:root{--bg:#e9ebef;--bar:#ffffff;--ink:#1d2330;--mut:#6b7385;--line:#dde1e8;--acc:#2f6bff;--accbg:#e8efff}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font:14px/1.4 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);display:flex;flex-direction:column;overflow:hidden}
svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

.bar{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:8px 12px;background:var(--bar);border-bottom:1px solid var(--line);z-index:5;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.group{display:flex;align-items:center;gap:4px;min-width:0}
.name{max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--mut);margin-left:6px}
.sep{width:1px;height:22px;background:var(--line);margin:0 6px}
button,select,input,.btn{font:inherit;color:inherit}
.btn{display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 12px;border-radius:8px;border:1px solid var(--line);background:var(--surf);cursor:pointer;white-space:nowrap}
.btn:hover{background:var(--hov)}
.btn.primary{background:var(--acc);border-color:var(--acc);color:#fff}
.btn.primary:hover{filter:brightness(1.07)}
.btn:disabled{opacity:.45;cursor:default}
.tool,.icon,.zoomlbl{height:34px;min-width:34px;border:0;border-radius:8px;background:transparent;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:18px}
.zoomlbl{font-size:13px;min-width:52px;color:var(--mut)}
.tool:hover,.icon:hover,.zoomlbl:hover{background:var(--hov)}
.tool.on{background:var(--accbg);color:var(--acc)}
.icon:disabled{opacity:.35;cursor:default}
.swatches{display:flex;gap:4px;margin:0 2px}
.sw{width:22px;height:22px;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px var(--line);cursor:pointer;padding:0}
.sw.on{box-shadow:0 0 0 2px var(--acc)}
select{height:30px;border:1px solid var(--line);border-radius:7px;background:var(--surf);padding:0 6px}
#pagenum{width:48px;height:30px;text-align:center;border:1px solid var(--line);border-radius:7px}
.of{color:var(--mut);margin:0 6px 0 4px;white-space:nowrap}

#viewer{flex:1;overflow:auto;position:relative;overscroll-behavior:contain}
#pages{display:flex;flex-direction:column;align-items:center;gap:14px;padding:18px 12px 60px;width:max-content;min-width:100%}
.page{position:relative;background:var(--surf);box-shadow:0 1px 4px rgba(20,30,50,.18);flex:none}
.page canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.page .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#b9bfcb;font-size:28px;font-weight:600;letter-spacing:.02em;pointer-events:none}
.page .ph::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,transparent 30%,rgba(230,234,242,.7) 50%,transparent 70%);background-size:220% 100%;animation:shim 1.3s linear infinite}
.page.drawn .ph{display:none}
@keyframes shim{from{background-position:120% 0}to{background-position:-120% 0}}
.page svg.ann{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none}
body.drawing .page svg.ann{pointer-events:auto;touch-action:none;cursor:crosshair}
body.t-text .page svg.ann{cursor:text}
body.t-erase .page svg.ann{cursor:cell}
.ann .hl{mix-blend-mode:multiply}
.ann text{font-family:Helvetica,Arial,sans-serif;white-space:pre}
.note-edit{position:absolute;z-index:3;min-width:140px;min-height:34px;padding:2px 4px;border:1.5px dashed var(--acc);background:rgba(255,255,255,.92);font-family:Helvetica,Arial,sans-serif;resize:both;outline:none;line-height:1.2}

.welcome{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:20px}
.drop{max-width:560px;width:100%;background:var(--surf);border:2px dashed #c5cbd8;border-radius:18px;padding:40px 34px;text-align:center}
.drop.over{border-color:var(--acc);background:var(--accbg)}
.drop .big{font-size:26px;font-weight:700}
.drop p{color:var(--mut);margin:6px 0 22px}
.drop ul{list-style:none;padding:0;margin:0;text-align:left;display:grid;gap:8px;color:var(--ink2)}
.link{color:var(--acc);cursor:pointer;text-decoration:underline}
body.loaded .welcome{display:none}

.toast{position:fixed;left:50%;bottom:22px;transform:translate(-50%,20px);background:#1d2330;color:#fff;padding:10px 16px;border-radius:10px;opacity:0;transition:.25s;pointer-events:none;z-index:20;max-width:90vw}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media (max-width:760px){
  .bar{padding:6px}
  .name,#size,.btn span{display:none}
  .tools{order:3;width:100%;justify-content:flex-start;overflow-x:auto;scrollbar-width:none;gap:2px}
  .tools::-webkit-scrollbar{display:none}
  .sw{width:20px;height:20px;flex:none}
  .tool,.icon{flex:none}
  .sep{margin:0 3px}
}

/* ---------- v2: notes column ---------- */
.main{flex:1;display:flex;min-height:0;position:relative}
#viewer{min-width:0}
.btn .count{font-size:11px;background:var(--acc);color:#fff;border-radius:9px;padding:1px 6px;margin-left:2px}
.btn .count:empty{display:none}
.btn[aria-pressed="true"]{background:var(--accbg);border-color:#c5d5ff;color:var(--acc)}
.btn.small{height:30px;padding:0 10px;font-size:13px;border-radius:7px}
.icon.sm{height:28px;min-width:28px;border-radius:6px}
.icon.sm svg{width:15px;height:15px}
.notes{display:none;width:var(--nw,440px);flex:none;flex-direction:column;background:#f7f8fa;border-left:1px solid var(--line);position:relative;min-width:300px;max-width:70vw}
body.notes-open.loaded .notes{display:flex}
.resize{position:absolute;left:-4px;top:0;bottom:0;width:8px;cursor:col-resize;z-index:2}
.nhead{display:flex;align-items:center;gap:4px;padding:8px 10px;background:var(--surf);border-bottom:1px solid var(--line)}
.ntitle{flex:1;display:flex;flex-direction:column;min-width:0;line-height:1.25;margin-left:2px}
.ntitle b{font-size:15px}.ntitle span{font-size:12px;color:var(--mut)}
.icon:disabled{opacity:.3}
.nstrip{flex:1;display:flex;gap:16px;overflow-x:auto;overflow-y:hidden;scroll-snap-type:x mandatory;padding:16px;scroll-padding:16px;overscroll-behavior-x:contain;min-height:0}
.npage{flex:0 0 calc(100% - 28px);scroll-snap-align:start;background:var(--surf);border:1px solid var(--line);border-radius:14px;box-shadow:0 2px 10px rgba(20,30,50,.06);display:flex;flex-direction:column;min-height:0;overflow:hidden}
.nph{display:flex;align-items:center;gap:8px;padding:8px 8px 8px 16px;font-size:12px;color:var(--mut);border-bottom:1px solid #f0f2f5}
.nph .when{flex:1;text-align:right;font-size:11px;color:#9aa2b2}
.blocks{flex:1;overflow-y:auto;padding:12px 16px;display:flex;flex-direction:column;gap:12px}
.blocks .hint{color:var(--mut);font-size:13px;margin:8px 0}
.npf{display:flex;gap:4px;padding:8px 10px;border-top:1px solid #f0f2f5}
.npf button{flex:1;height:36px;border:0;background:transparent;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;gap:6px;font-size:13px;color:var(--ink2);cursor:pointer}
.npf button:hover{background:var(--hov)}
.npf svg{width:16px;height:16px}
.blk{position:relative;border-radius:10px}
.blk .bmenu{position:absolute;top:-10px;right:-6px;display:none;background:var(--surf);border:1px solid var(--line);border-radius:8px;box-shadow:0 2px 6px rgba(0,0,0,.08);z-index:1}
.blk:hover .bmenu,.blk:focus-within .bmenu{display:flex}
.blk-text textarea{width:100%;box-sizing:border-box;border:0;outline:0;resize:none;font:15px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:transparent;padding:4px 2px;min-height:30px;overflow:hidden}
.blk-text:focus-within{background:#fafbfd;box-shadow:0 0 0 2px #e3ebff}
.imgbtn{display:block;width:100%;padding:0;border:0;background:#f3f5f8;border-radius:10px;overflow:hidden;cursor:zoom-in}
.imgbtn img{display:block;width:100%;height:auto;max-height:420px;object-fit:contain}
.cap{width:100%;box-sizing:border-box;border:0;outline:0;font-size:13px;color:var(--mut);padding:6px 2px;background:transparent}
.vcard{display:flex;gap:12px;align-items:stretch;border:1px solid var(--line);border-radius:12px;padding:8px;background:var(--surf)}
.vthumb{position:relative;flex:none;width:150px;height:86px;border:0;border-radius:8px;background:#1d2330 center/cover no-repeat;cursor:pointer;color:#fff}
.vplay{position:absolute;inset:0;margin:auto;width:38px;height:38px;border-radius:50%;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center}
.vplay svg{width:18px;height:18px;margin-left:2px}
.vtime{position:absolute;right:6px;bottom:6px;background:rgba(0,0,0,.75);font-size:11px;padding:2px 6px;border-radius:5px}
.vtxt{display:flex;flex-direction:column;gap:3px;min-width:0;padding-top:2px}
.vtxt b{font-size:14px;line-height:1.3}
.vtxt small{font-size:12px;color:var(--mut)}
.vtxt .link{margin-top:auto;display:inline-flex;align-items:center;gap:4px;border:0;background:none;padding:0;font-size:12px;cursor:pointer;width:max-content}
.vtxt .link svg{width:13px;height:13px}
.vform{display:flex;flex-direction:column;gap:10px;border:1px dashed #c5cbd8;border-radius:12px;padding:12px;background:#fbfcfe}
.fl{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--mut)}
.fl input{height:36px;border:1px solid var(--line);border-radius:8px;padding:0 10px;font-size:14px;color:var(--ink);background:var(--surf)}
.fl.sm input{width:80px}
.vrow{display:flex;gap:8px;align-items:flex-end;flex-wrap:wrap}
.or{font-size:12px;color:var(--mut)}
.verr{color:#b42318;font-size:12px;align-self:center}
.npage.add{background:transparent;border:2px dashed var(--line);box-shadow:none;align-items:center;justify-content:center}
.npage.add.empty{background:var(--surf);border-style:solid;border-width:1px;border-color:var(--line)}
.addbtn{border:0;background:none;display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--mut);font-size:14px;cursor:pointer;padding:30px}
.addbtn .plus{width:52px;height:52px;border-radius:50%;background:var(--surf);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:28px;color:var(--acc)}
.addin{padding:28px;text-align:center;max-width:340px}
.addin .big{font-size:18px;font-weight:700;margin-bottom:6px}
.addin p{color:var(--mut);font-size:13px;margin:0 0 18px}
.quick{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.quick button{height:78px;border:1px solid var(--line);background:var(--surf);border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;font-size:13px;cursor:pointer}
.quick button:hover{border-color:var(--acc);color:var(--acc)}
.quick svg{width:22px;height:22px;color:var(--acc)}
.ndots{display:flex;justify-content:center;gap:6px;padding:0 0 12px;min-height:8px}
.dot{width:8px;height:8px;border-radius:4px;border:0;padding:0;background:#c9d0dc;cursor:pointer}
.dot.on{width:22px;background:var(--acc)}
.dot.plus{background:transparent;box-shadow:inset 0 0 0 1.5px #c9d0dc}
.dot.plus.on{background:var(--acc);box-shadow:none}
.notes.over{outline:3px dashed var(--acc);outline-offset:-6px}

/* badge on the PDF page edge */
.nbadge{position:absolute;right:-12px;top:96px;z-index:2;width:34px;min-height:52px;border:0;border-radius:10px 0 0 10px;background:var(--acc);color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font:700 13px system-ui,sans-serif;cursor:pointer;box-shadow:0 2px 8px rgba(47,107,255,.35);padding:6px 0}
.nbadge svg{width:15px;height:15px}
.nbadge[hidden]{display:none}

/* menu */
.menuwrap{position:relative}
.menu{position:absolute;right:0;top:40px;z-index:30;background:var(--surf);border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 28px rgba(20,30,50,.16);padding:6px;min-width:250px;display:flex;flex-direction:column}
.menu[hidden]{display:none}
.menu button,.menu .mi{border:0;background:none;text-align:left;padding:10px 12px;border-radius:8px;font-size:14px;cursor:pointer}
.menu button:hover,.menu .mi:hover{background:#f2f4f8}
.mstatus{font-size:12px;color:var(--mut);padding:8px 12px 6px;border-top:1px solid #f0f2f5;margin-top:4px;line-height:1.4}
.mstatus button{padding:4px 0;color:var(--acc);font-size:12px}

/* modal (video player, image) */
.modal{position:fixed;inset:0;z-index:40;background:rgba(15,20,30,.6);display:flex;align-items:center;justify-content:center;padding:20px}
.modal[hidden]{display:none}
.mbox{background:var(--surf);border-radius:14px;width:min(960px,100%);max-height:100%;display:flex;flex-direction:column;overflow:hidden}
.mtop{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 8px 8px 16px;border-bottom:1px solid var(--line)}
.mbody{background:#000;display:flex;align-items:center;justify-content:center;min-height:120px}
.ytwrap{width:100%;aspect-ratio:16/9;position:relative}
.ytwrap iframe,.ytwrap>div{position:absolute;inset:0;width:100%;height:100%;border:0}
.mbody video{width:100%;max-height:70vh;display:block}
.mimg{max-width:100%;max-height:78vh;display:block;background:var(--surf)}
.merr{color:#fff;padding:30px;text-align:center}
.merr a{color:#9fc0ff}
.mbar{display:flex;align-items:center;gap:8px;padding:10px 12px;flex-wrap:wrap}
.mbar:empty{display:none}
.picked{font-size:13px;color:var(--mut);flex:1}
.toast button{margin-left:12px;background:none;border:0;color:#9fc0ff;font-weight:700;cursor:pointer;font-size:14px}
.toast.show{pointer-events:auto}

@media (max-width:760px){
  .notes{position:absolute;inset:0;width:auto!important;max-width:none;z-index:10}
  .resize{display:none}
  .npage{flex-basis:calc(100% - 20px)}
  .menu{right:-40px}
  #notesbtn span{display:none}
  #zin,#zout,.bar .group:last-child .sep{display:none}
  .bar{justify-content:flex-start}
  .bar>.group:nth-child(3){margin-left:auto}
  .btn{padding:0 9px}
}

/* ---------- v3: free-form note pages ---------- */
.pscroll{flex:1;overflow-y:auto;overflow-x:hidden;min-height:0}
.pwrap{position:relative;width:calc(420px * var(--s,1));overflow:hidden}
.paper{position:absolute;left:0;top:0;width:420px;transform:scale(var(--s,1));transform-origin:0 0;background:var(--paper) radial-gradient(#e1e5ec 0.9px,transparent 1px) 10px 10px/21px 21px}
.nink{position:absolute;left:0;top:0;width:100%;height:100%;pointer-events:none;overflow:visible;z-index:2}
.nink .hl{mix-blend-mode:multiply}
.items{position:absolute;inset:0;z-index:1}
.it{position:absolute;touch-action:none;cursor:move;border-radius:4px}
.it-text .tx{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.4;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;min-height:1.4em;padding:1px 2px}
.it-text textarea{display:block;width:100%;box-sizing:border-box;border:0;outline:0;resize:none;font:inherit;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:inherit;line-height:1.4;padding:1px 2px;background:rgba(47,107,255,.06);overflow:hidden;cursor:text;touch-action:auto}
.it-text.editing{outline:1.5px dashed var(--acc);outline-offset:3px}
.it-img img{display:block;width:100%;height:auto;border-radius:4px;user-select:none;-webkit-user-drag:none;pointer-events:none}
.it-vid{background:var(--surf)}
.it-vid .vbox{position:relative;aspect-ratio:16/9;background:#111;border-radius:6px;overflow:hidden}
.it-vid .vbox iframe,.it-vid .vbox video{position:absolute;inset:0;width:100%;height:100%;border:0}
.it-vid .vthumb{position:absolute;inset:0;width:100%;height:100%;border-radius:0}
.it-vid .merr{color:#fff;font-size:13px;padding:16px;text-align:center}
.it-vid .merr a{color:#9fc0ff}
.vbar{display:flex;align-items:center;gap:2px;font-size:12px;padding:5px 2px 0;color:#5d6577;cursor:default}
.vcap{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.vcap b{color:var(--ink);font-weight:600}
.vb{border:0;background:none;width:28px;height:28px;border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--ink2);flex:none}
.vb:hover{background:var(--hov)}
.vb svg{width:15px;height:15px}
.it.sel{outline:1.5px solid var(--acc);outline-offset:4px}
.it .ix,.it .rh{display:none}
body:not(.drawing) .it.sel:not(.editing) .ix,body:not(.drawing) .it.sel:not(.editing) .rh{display:flex}
.ix{position:absolute;top:-17px;right:-17px;width:26px;height:26px;border-radius:13px;border:1px solid #f1c4c4;background:var(--surf);color:#b42318;align-items:center;justify-content:center;cursor:pointer;z-index:3;padding:0;box-shadow:0 1px 4px rgba(0,0,0,.12)}
.ix svg{width:13px;height:13px}
.rh{position:absolute;right:-9px;bottom:-9px;width:16px;height:16px;border-radius:4px;background:var(--acc);border:2px solid #fff;cursor:nwse-resize;z-index:3;box-shadow:0 1px 3px rgba(0,0,0,.25)}
.phint{position:absolute;top:36%;left:40px;right:40px;text-align:center;color:var(--mut2);font-size:14px;line-height:1.6;pointer-events:none;margin:0}
body.drawing:not(.t-text):not(.t-image):not(.t-video) .paper{touch-action:none;cursor:crosshair}
body.drawing:not(.t-text):not(.t-image):not(.t-video) .paper .it{pointer-events:none}
body.t-text .paper{cursor:text}
body.t-text .paper .it:not(.it-text){pointer-events:none}
body.t-image .paper,body.t-video .paper{cursor:copy}
body.t-image .paper .it,body.t-video .paper .it:not(.it-vid){pointer-events:none}
.addin .btn{margin:0 auto}
.mform{background:var(--surf);width:100%;box-sizing:border-box;padding:18px 18px 4px;display:flex;flex-direction:column;gap:12px}
.mform .verr{margin:0;min-height:16px}
.mbody:has(.mform){background:var(--surf)}

/* ---------- v3.1: fonts, text bar, drag handle ---------- */
@font-face{font-family:'Inter';src:url(lib/fonts/inter-latin-400-normal.woff2) format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'Inter';src:url(lib/fonts/inter-latin-700-normal.woff2) format('woff2');font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'Inter';src:url(lib/fonts/inter-latin-400-italic.woff2) format('woff2');font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:'Inter';src:url(lib/fonts/inter-latin-700-italic.woff2) format('woff2');font-weight:700;font-style:italic;font-display:swap}
@font-face{font-family:'Lora';src:url(lib/fonts/lora-latin-400-normal.woff2) format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'Lora';src:url(lib/fonts/lora-latin-700-normal.woff2) format('woff2');font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'Lora';src:url(lib/fonts/lora-latin-400-italic.woff2) format('woff2');font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:'Lora';src:url(lib/fonts/lora-latin-700-italic.woff2) format('woff2');font-weight:700;font-style:italic;font-display:swap}
@font-face{font-family:'Caveat';src:url(lib/fonts/caveat-latin-400-normal.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'Caveat';src:url(lib/fonts/caveat-latin-700-normal.woff2) format('woff2');font-weight:700;font-display:swap}
@font-face{font-family:'Patrick Hand';src:url(lib/fonts/patrick-hand-latin-400-normal.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'Kalam';src:url(lib/fonts/kalam-latin-400-normal.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'Kalam';src:url(lib/fonts/kalam-latin-700-normal.woff2) format('woff2');font-weight:700;font-display:swap}
@font-face{font-family:'JetBrains Mono';src:url(lib/fonts/jetbrains-mono-latin-400-normal.woff2) format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'JetBrains Mono';src:url(lib/fonts/jetbrains-mono-latin-700-normal.woff2) format('woff2');font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'JetBrains Mono';src:url(lib/fonts/jetbrains-mono-latin-400-italic.woff2) format('woff2');font-weight:400;font-style:italic;font-display:swap}
.it-text .tx,.it-text textarea{font-family:inherit!important;font-weight:inherit;font-style:inherit;text-decoration:inherit}
.tbar{display:flex;align-items:center;gap:4px;flex-wrap:wrap;padding:6px 10px;background:var(--surf);border-bottom:1px solid var(--line)}
.tbar[hidden]{display:none}
.tbar select{height:30px;font-size:13px}
#tfont{min-width:104px}
.tb{height:30px;min-width:30px;border:1px solid transparent;border-radius:7px;background:transparent;cursor:pointer;font-size:14px;display:inline-flex;align-items:center;justify-content:center;padding:0 6px}
.tb:hover{background:var(--hov)}
.tb[aria-pressed="true"]{background:var(--accbg);color:var(--acc);border-color:#c5d5ff}
.tb svg{width:16px;height:16px}
.tb.wide{font-size:12px;color:var(--mut);margin-left:auto}
.tcolors{display:flex;gap:3px;margin:0 2px}
.tc{width:18px;height:18px;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px var(--line);cursor:pointer;padding:0}
.tc.on{box-shadow:0 0 0 2px var(--acc)}
.dh{position:absolute;left:-22px;top:-1px;width:18px;height:24px;display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1;color:var(--mut2);cursor:grab;pointer-events:auto!important;opacity:.35;border-radius:5px;user-select:none;touch-action:none;z-index:3}
.it:hover .dh,.it.sel .dh,.it.editing .dh,.dh:hover{opacity:1;background:var(--hov)}
.dh:active{cursor:grabbing}
.it-img .dh,.it-vid .dh{top:4px}

.brand{display:inline-flex;width:34px;height:34px;margin-right:4px}.brand svg{width:34px;height:34px;stroke:none}

/* ---------- v3.3: home screen (study desk) ---------- */
.welcome.home{position:static;display:block;padding:28px 24px 64px}
.hwrap{max-width:1120px;margin:0 auto}
.hhead{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}
.hhead h1{font-size:26px;margin:0;letter-spacing:-.01em}
.hlabel{font-size:12px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--mut);margin:0 0 12px}
.hsec{margin-top:34px}
.ccard{width:100%;display:flex;gap:22px;align-items:center;text-align:left;background:var(--surf);border:1px solid var(--line);border-radius:16px;padding:18px;cursor:pointer;font:inherit;color:inherit;box-shadow:0 2px 10px rgba(20,30,50,.05)}
.ccard:hover{border-color:#c5d5ff;box-shadow:0 6px 18px rgba(47,107,255,.12)}
.cbody{display:flex;flex-direction:column;gap:8px;min-width:0;flex:1}
.cname{font-size:20px;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cbtn{align-self:flex-start;margin-top:6px;pointer-events:none}
.cbtn svg{width:18px;height:18px}
.thumb{display:flex;align-items:center;justify-content:center;background:#f3f5f8;border-radius:8px;overflow:hidden;width:100%;aspect-ratio:3/4;border:1px solid #e8ebf0}
.thumb img{width:100%;height:100%;object-fit:cover;object-position:top}
.thumb svg{width:44%;height:auto;stroke:none}
.thumb.big{width:120px;flex:none}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:16px}
.fcard{position:relative}
.fopen{width:100%;display:flex;flex-direction:column;gap:6px;text-align:left;background:var(--surf);border:1px solid var(--line);border-radius:12px;padding:10px;cursor:pointer;font:inherit;color:inherit}
.fopen:hover{border-color:#c5d5ff;box-shadow:0 4px 14px rgba(47,107,255,.12)}
.fname{font-weight:600;font-size:14px;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}
.fmeta{font-size:12px;color:var(--mut)}
.prog{display:block;height:4px;border-radius:2px;background:var(--hov);overflow:hidden}
.prog i{display:block;height:100%;background:var(--acc);border-radius:2px}
.prog.wide{max-width:420px;height:6px;border-radius:3px}
.fx{position:absolute;top:6px;right:6px;width:26px;height:26px;border-radius:13px;border:1px solid var(--line);background:var(--surf);color:var(--mut);cursor:pointer;display:none;font-size:16px;line-height:1}
.fcard:hover .fx,.fx:focus{display:block}
.fhead{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.fhead .hlabel{margin:0}
.fcount{font-size:12px;color:var(--mut)}
.fsearch{margin-left:auto;height:34px;border:1px solid var(--line);border-radius:8px;padding:0 10px;font:inherit;font-size:14px;width:200px}
.fgroup{font-weight:700;font-size:14px;margin:20px 0 10px;color:var(--ink)}
.fsetup{display:flex;align-items:center;gap:20px;background:var(--surf);border:1px dashed #c5cbd8;border-radius:16px;padding:20px 22px}
.fsetup h3{margin:0 0 4px;font-size:17px}
.fsetup p{margin:0;color:var(--mut);font-size:14px;line-height:1.5}
.fsetup .btn{flex:none}
.ficon{width:46px;flex:none}
.ficon svg{width:46px;height:auto;stroke:none}
.fallow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--surf);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.fallow p{margin:0;flex:1;min-width:220px;color:var(--mut);font-size:14px}
.hnote{color:var(--mut);font-size:14px}
.firstrun{background:var(--surf);border:1px solid var(--line);border-radius:16px;padding:24px}
.firstrun h2{margin:0 0 6px;font-size:20px}
.firstrun p{margin:0;color:var(--mut)}
.home .drop{max-width:none;margin-top:34px;padding:18px;border-radius:12px;font-size:14px;color:var(--mut);text-align:center;background:transparent}
.home .drop .mut{color:var(--mut)}
.hfoot{text-align:center;font-size:13px;color:var(--mut);margin-top:18px}
@media (max-width:760px){
  .welcome.home{padding:18px 12px 48px}
  .ccard{flex-direction:column;align-items:stretch}
  .thumb.big{width:90px}
  .ccard{flex-direction:row}
  .cname{font-size:16px;white-space:normal}
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .fsetup{flex-direction:column;align-items:flex-start}
  .fsearch{width:100%;margin-left:0}
}

body:not(.loaded) #tools,body:not(.loaded) #zout,body:not(.loaded) #zfit,body:not(.loaded) #zin,body:not(.loaded) #pagenum,body:not(.loaded) .of,body:not(.loaded) #notesbtn,body:not(.loaded) #save,body:not(.loaded) .bar .sep{display:none}
.ccard.fopen{flex-direction:row;align-items:center;gap:22px;padding:18px;border-radius:16px}
.ccard .cbody{align-items:flex-start}
@media (max-width:760px){.ccard.fopen{gap:14px;padding:12px}}
.ccard .prog.wide{width:100%;max-width:420px}

/* ---------- v3.4: one-line toolbar, pop-ups ---------- */
.bar{flex-wrap:nowrap}
.bar .tools{flex:1;justify-content:center;min-width:0}
.popwrap{position:relative;display:inline-flex}
.colorbtn{height:34px;display:inline-flex;align-items:center;gap:6px;padding:0 6px 0 8px;border:1px solid var(--line);border-radius:9px;background:var(--surf);cursor:pointer}
.colorbtn:hover{background:var(--hov)}
.colorbtn .dot{width:18px;height:18px;border-radius:50%;box-shadow:inset 0 0 0 1px rgba(0,0,0,.12)}
.colorbtn .thick{width:16px;background:var(--ink2);border-radius:4px}
.colorbtn .chev{width:14px;height:14px;color:var(--mut)}
.pop{position:absolute;top:42px;left:0;z-index:40;background:var(--surf);border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 30px rgba(20,30,50,.16);padding:10px 12px;min-width:220px}
.pop.right{left:auto;right:0;min-width:0}
.pop[hidden]{display:none}
.poplbl{margin:2px 0 6px;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--mut)}
.pop .swatches{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 10px}
.pop .sw{width:24px;height:24px}
.sizes{display:flex;gap:6px}
.sizes button{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;padding:8px 4px;border:1px solid var(--line);border-radius:8px;background:var(--surf);font-size:12px;cursor:pointer}
.sizes button i{display:block;width:28px;background:var(--ink2);border-radius:4px}
.sizes button.on{border-color:var(--acc);background:var(--accbg);color:var(--acc)}
.tbar{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:thin}
.tbar select{flex:none}
#tfont{min-width:0;width:108px}
#tsize{width:58px}
.tcolorbtn .dot{width:16px;height:16px;border-radius:50%;box-shadow:inset 0 0 0 1px rgba(0,0,0,.15);display:block}
.tbar .popwrap{margin-left:auto}
.tbar .pop{top:36px}
.tbar .tcolors{display:flex;gap:6px}
.tbar .tc{width:22px;height:22px}
#tdefault svg{width:16px;height:16px}
@media (max-width:1120px){#save .lbl,#notesbtn>span{display:none}.bar .sep{margin:0 3px}}
@media (max-width:960px){.bar{flex-wrap:wrap}.bar .tools{order:3;flex-basis:100%;justify-content:flex-start;overflow-x:auto}}
/* v3.4 note items: edges, bigger grab handle, wide pages */
.pscroll{overflow-x:auto}
.pwrap{overflow:visible}
.paper{background-color:#fff}
.it .re,.it .be{display:none;position:absolute;z-index:3}
.re{right:-6px;top:20%;bottom:20%;width:10px;cursor:ew-resize}
.be{bottom:-6px;left:20%;right:20%;height:10px;cursor:ns-resize}
.re::after,.be::after{content:"";position:absolute;background:var(--acc);border-radius:3px;border:2px solid #fff;box-shadow:0 1px 3px rgba(0,0,0,.25)}
.re::after{left:1px;top:50%;width:6px;height:22px;margin-top:-11px}
.be::after{top:1px;left:50%;height:6px;width:22px;margin-left:-11px}
body:not(.drawing) .it.sel:not(.editing) .re,body:not(.drawing) .it.sel:not(.editing) .be{display:block}
.dh{left:-28px;top:-3px;width:24px;height:30px;font-size:19px;opacity:.5}
.paper:hover .dh{opacity:.6}
.it:hover .dh,.it.sel .dh,.it.editing .dh,.dh:hover{opacity:1;background:#e9eef7;color:#2f6bff}
body.t-text .paper .it-text:not(.editing){cursor:move}
/* v3.5: PDF text notes – no outline on letters, floating style bar */
svg.ann,svg.nink{stroke:none;fill:none}
svg.ann text{stroke:none}
.note-edit{font-weight:400}
.ptbar{position:fixed;z-index:35;display:flex;align-items:center;gap:4px;background:var(--surf);border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 24px rgba(20,30,50,.16);padding:5px 8px}
.ptbar[hidden]{display:none}
.ptbar select{height:30px;font-size:13px}
#pfont{width:108px}#psize{width:58px}
.ptbar .tcolors{display:flex;gap:4px;margin:0 4px}
.ptbar .tc{width:18px;height:18px}
#pdefault svg{width:16px;height:16px}

/* ======================= v4: new look (logo A) ======================= */
@font-face{font-family:'Space Grotesk';src:url(lib/fonts/space-grotesk-latin-500-normal.woff2) format('woff2');font-weight:500;font-display:swap}
@font-face{font-family:'Space Grotesk';src:url(lib/fonts/space-grotesk-latin-600-normal.woff2) format('woff2');font-weight:600;font-display:swap}
@font-face{font-family:'Space Grotesk';src:url(lib/fonts/space-grotesk-latin-700-normal.woff2) format('woff2');font-weight:700;font-display:swap}
:root{--bg:#EEF0F5;--bar:#F6F7FB;--ink:#1C2230;--mut:#5B6478;--line:#E6E9F1;--acc:#3157F4;--acc2:#2443C9;--accbg:#E9EEFF;--card:0 1px 2px rgba(28,34,48,.06),0 10px 28px rgba(28,34,48,.07)}
body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
.acc{color:var(--acc)}

/* top bar */
.bar{background:var(--bar);border-bottom:0;box-shadow:none;padding:10px 14px;min-height:64px;gap:12px}
.brand{width:36px;height:36px}.brand svg{width:36px;height:36px}
.bar .tools{flex:0 1 auto;margin:0 auto;background:var(--surf);border-radius:14px;padding:4px;gap:2px;box-shadow:var(--card)}
.tool,.icon{border-radius:10px}
.tool{width:40px;height:40px;color:var(--ink2)}
.tool:hover{background:var(--hov)}
.tool.on{background:var(--accbg);color:var(--acc)}
.bar .tools .sep{background:var(--line);height:24px;margin:0 4px}
.colorbtn{border:0;background:var(--surf2);height:40px;border-radius:10px;padding:0 8px 0 10px}
.btn{border:0;border-radius:10px;height:40px;box-shadow:inset 0 0 0 1px var(--line);background:var(--surf);font-weight:600;font-size:13.5px}
.btn:hover{background:var(--surf2)}
.btn.primary{background:var(--acc);color:#fff;box-shadow:0 6px 16px rgba(49,87,244,.26)}
.btn.primary:hover{background:var(--acc2)}
.btn[aria-pressed="true"]{background:var(--accbg);color:var(--acc2);box-shadow:none}
.zoomlbl{color:var(--mut)}
#pagenum{height:36px;border-radius:9px;border-color:var(--line)}
.name{font-weight:600;color:var(--ink);font-size:14px}
#outlinebtn[aria-pressed="true"]{background:var(--accbg);color:var(--acc)}
body:not(.loaded) #outlinebtn{display:none}

/* reading area */
#viewer{background:var(--bg)}
.page{box-shadow:0 2px 6px rgba(28,34,48,.08),0 18px 40px rgba(28,34,48,.10);border-radius:3px}
.nbadge{background:var(--acc);border-radius:12px 0 0 12px;box-shadow:0 4px 12px rgba(49,87,244,.35)}

/* chapters panel */
.outline{display:none;width:250px;flex:none;flex-direction:column;background:var(--bar);box-shadow:1px 0 0 var(--line)}
body.outline-open.loaded .outline{display:flex}
.ohead{display:flex;align-items:center;justify-content:space-between;padding:14px 12px 8px 18px;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mut2)}
.olist{flex:1;overflow-y:auto;padding:0 10px 16px;display:flex;flex-direction:column;gap:2px}
.oitem{display:flex;justify-content:space-between;align-items:center;gap:8px;min-height:36px;padding:6px 10px;border:0;border-radius:9px;background:transparent;text-align:left;font:inherit;font-size:13px;color:var(--ink2);cursor:pointer}
.oitem span{overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.oitem small{color:var(--mut2);font-size:11px;flex:none}
.oitem:hover{background:var(--surf)}
.oitem.on{background:var(--surf);color:var(--ink);font-weight:600;box-shadow:0 1px 2px rgba(28,34,48,.08)}
.oitem.d1{padding-left:22px;font-size:12.5px}.oitem.d2{padding-left:34px;font-size:12px}
.oitem:disabled{opacity:.5;cursor:default}
.onote{color:var(--mut);font-size:13px;padding:6px 10px}
@media (max-width:760px){.outline{position:absolute;inset:0 auto 0 0;width:85%;z-index:11;box-shadow:0 0 40px rgba(0,0,0,.2)}}

/* notes column */
.notes{background:var(--bar);border-left:0;box-shadow:-1px 0 0 var(--line)}
.nhead{background:transparent;border-bottom:0;padding:10px 12px}
.ntitle b{font-family:'Space Grotesk',Inter,sans-serif;font-size:16px;font-weight:600}
.npage{border:0;border-radius:14px;box-shadow:var(--card)}
.nph{border-bottom-color:var(--line)}
.paper{background:var(--surf) radial-gradient(#E4E8F0 0.9px,transparent 1.1px) 10px 10px/20px 20px}
.tbar{background:transparent;border-bottom:0;padding:4px 12px 8px}
.tbar select,.ptbar select{border-radius:8px;border-color:var(--line)}
.ptbar,.pop,.menu{border:0;box-shadow:0 1px 2px rgba(28,34,48,.08),0 14px 36px rgba(28,34,48,.16)}
.dot.on{background:var(--acc)}

/* study desk */
.welcome.home{background:var(--bar)}
.hwrap{max-width:1200px}
.hhead{align-items:flex-end;margin:6px 0 24px}
.hgreet{display:flex;flex-direction:column;gap:4px}
.hgreet span{font-size:14px;color:var(--mut)}
.hhead h1{font-family:'Space Grotesk',Inter,sans-serif;font-size:32px;font-weight:600;letter-spacing:-.02em}
.hrow{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:20px;align-items:stretch}
.hrow #hlatest.empty{display:none}
.hrow:has(#hlatest.empty){grid-template-columns:1fr}
.hlabel{color:var(--mut2)}
.ccard{border:0;border-radius:20px;box-shadow:var(--card);padding:22px;gap:24px}
.ccard.fopen{padding:22px}
.ccard:hover{box-shadow:0 1px 2px rgba(28,34,48,.06),0 14px 34px rgba(49,87,244,.14)}
.thumb{border:0;border-radius:10px;box-shadow:0 2px 10px rgba(28,34,48,.14);background:var(--surf)}
.thumb.big{width:150px}
.cname{font-family:'Space Grotesk',Inter,sans-serif;font-size:24px;font-weight:600;letter-spacing:-.01em}
.cbtn{height:46px;padding:0 20px;border-radius:12px;font-size:15px}
.prog{background:var(--line)}
.latest{background:var(--surf);border-radius:20px;box-shadow:var(--card);padding:10px;display:flex;flex-direction:column;gap:4px;height:calc(100% - 26px);box-sizing:border-box}
.lnote{display:flex;gap:12px;align-items:flex-start;text-align:left;border:0;background:transparent;border-radius:12px;padding:10px;cursor:pointer;font:inherit;color:inherit}
.lnote:hover{background:var(--surf2)}
.lpage{flex:none;min-width:40px;font-size:11px;font-weight:700;color:var(--acc2);background:var(--accbg);border-radius:8px;text-align:center;padding:5px 4px}
.ltext{display:flex;flex-direction:column;gap:2px;min-width:0}
.lt{font:18px/1.25 'Patrick Hand',cursive;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lt.video{font:600 14px/1.3 Inter,sans-serif}
.lplay{display:none}
.lsrc{font-size:12px;color:var(--mut2)}
.fopen{border:0;border-radius:14px;box-shadow:var(--card);padding:10px}
.fopen:hover{box-shadow:0 1px 2px rgba(28,34,48,.06),0 12px 28px rgba(49,87,244,.14)}
.fsetup,.fallow,.firstrun{border:0;border-radius:18px;box-shadow:var(--card);background:var(--surf)}
.home .drop{border-color:var(--line)}
.fsearch{border-radius:10px;border-color:var(--line);height:38px}
.fgroup{font-family:'Space Grotesk',Inter,sans-serif;font-size:15px}
@media (max-width:900px){.hrow{grid-template-columns:1fr}.latest{height:auto}}
.welcome.home{min-height:100%;box-sizing:border-box}
.wordmark{display:none;font-family:'Space Grotesk',Inter,sans-serif;font-weight:600;font-size:20px;letter-spacing:-.02em;margin-left:4px}
body:not(.loaded) .wordmark{display:inline}
body:not(.loaded) .bar label.btn.primary{display:none}
@media (max-width:960px){.bar .tools{flex:1 1 100%;margin:0;overflow-x:auto;justify-content:flex-start}.bar .tools>*{flex:none}}

/* ---------- v4.1: tool cursors (pen never scrolls the PDF) ---------- */
body.drawing .page svg.ann,body.drawing:not(.t-text):not(.t-image):not(.t-video) .paper{touch-action:none}
body:not(.drawing) .page{cursor:grab}
body.panning,body.panning *{cursor:grabbing!important}
/* pen, highlighter, eraser: hide the pointer, the page draws its own dot (#tdot) */
body.t-pen .page svg.ann,body.t-hl .page svg.ann,body.t-erase .page svg.ann,
body.t-pen .paper,body.t-hl .paper,body.t-erase .paper,
body.t-pen .paper *,body.t-hl .paper *,body.t-erase .paper *{cursor:none!important}
body.t-text .page svg.ann{cursor:text}
body.t-image .page svg.ann,body.t-video .page svg.ann{cursor:not-allowed}
#tdot{position:fixed;left:0;top:0;z-index:9999;pointer-events:none;display:none;border-radius:50%;box-sizing:border-box;box-shadow:0 0 0 1.5px #fff,0 0 0 2.5px rgba(29,35,48,.55)}
#tdot.d-hl{border-radius:3px;opacity:.55}
#tdot.d-erase{border:2px solid #1d2330;box-shadow:0 0 0 1.5px #fff}

/* ---------- v4.3: text without boxes, Select tool ---------- */
.note-edit{border:0!important;background:transparent!important;padding:0!important;margin:0;resize:none!important;outline:none!important;min-width:2ch!important;min-height:0!important;line-height:1.2;overflow:hidden;white-space:pre;field-sizing:content;caret-color:var(--acc);box-shadow:none}
.it-text.editing{outline:none}
.it-text textarea{background:transparent}
.it.editing .dh,.it.editing .ix,.it.editing .rh,.it.editing .re,.it.editing .be{display:none!important}
body.t-text .page svg.ann text{cursor:move}
body.t-select .page svg.ann{cursor:default}
body.t-select .page svg.ann .psel,body.t-select .page svg.ann text,body.t-select .page svg.ann path{cursor:move}
svg.ann .psel,svg.nink .msel{filter:drop-shadow(0 0 1.5px #3157F4) drop-shadow(0 0 3px rgba(49,87,244,.6))}
.it.msel{box-shadow:0 0 0 2px rgba(49,87,244,.55),0 0 10px rgba(49,87,244,.25);border-radius:6px}
.selbox{position:absolute;z-index:4;border:1.5px solid #3157F4;background:rgba(49,87,244,.08);border-radius:3px;pointer-events:none}
body.t-select .paper{touch-action:none;cursor:default}
body.t-select .paper .it{pointer-events:auto!important;cursor:move}
body.t-select .paper .it *{pointer-events:none!important}

/* ---------- v4.4: plain text on note pages – no handle, no frame ---------- */
.it-text .dh,.it-text .re,.it-text .be,.it-text .rh,.it-text .ix{display:none!important}
.it-text.sel{outline:none}
.it-text.sel .tx{background:rgba(49,87,244,.08);border-radius:4px;width:fit-content;max-width:100%}
.it:not(.it-text) .dh{opacity:0}
.it:not(.it-text):hover .dh{opacity:1}

/* ---------- v4.5: text fits its words; text style bar lives in the top toolbar ---------- */
.it-text{width:max-content!important;max-width:400px}
.it-text textarea{width:auto;min-width:1ch;max-width:400px;field-sizing:content;white-space:pre-wrap}
.it-text .tx{min-width:1ch}
.it-text.msel{box-shadow:none}
.it-text.msel .tx{background:rgba(49,87,244,.1);border-radius:4px}
#tbar.flyout select{height:32px;border:1px solid var(--line);border-radius:8px;background:var(--surf);font-size:13px;padding:0 4px;color:#1d2330}
#tbar.flyout #tfont{width:112px}
#tbar.flyout #tsize{width:54px}
#tbar.flyout .tb{height:32px;min-width:30px;border-radius:8px}
#tbar.flyout .tb[aria-pressed="true"]{background:var(--accbg);color:var(--acc)}
#tbar.flyout .popwrap{margin-left:0}
#tbar.flyout .pop{top:42px;left:auto;right:0}
#tbar.flyout .tcolors{display:grid;grid-template-columns:repeat(6,22px);gap:8px}
#tbar.flyout .tcolorbtn .dot{width:16px;height:16px;border-radius:50%;display:block;box-shadow:0 0 0 1px rgba(0,0,0,.12)}
/* room for the text style controls */
@media (max-width:1300px){#tbar.flyout #tfont{width:96px}#tbar.flyout #tsize{width:50px}#tbar.flyout .tb{min-width:28px}}

/* ---------- v4.6: visible divider between PDF and notes ---------- */
.notes{max-width:calc(100vw - 340px)}
.resize{left:-8px;width:16px;cursor:col-resize;z-index:6;touch-action:none;display:flex;align-items:center;justify-content:center}
.resize::before{content:'';position:absolute;top:0;bottom:0;left:7px;width:2px;background:transparent;transition:background .15s}
.resize .grip{position:relative;width:10px;height:44px;border-radius:6px;background:var(--surf);box-shadow:0 0 0 1px var(--line),0 2px 6px rgba(28,34,48,.12);
  background-image:radial-gradient(circle,#9aa3b5 1.2px,transparent 1.4px);background-size:10px 8px;background-position:center 2px;transition:.15s}
.resize:hover::before,body.resizing .resize::before{background:var(--acc)}
.resize:hover .grip,body.resizing .resize .grip{box-shadow:0 0 0 1.5px var(--acc),0 2px 8px rgba(49,87,244,.3);height:56px}
body.resizing,body.resizing *{cursor:col-resize!important;user-select:none}

/* ---------- v4.7: download notes ---------- */
.menu .mhead{margin:4px 12px 2px;font-size:11px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--mut2)}
.menu .msep{border:0;border-top:1px solid var(--line);margin:6px 4px}

/* ---------- v4.9: tall (9:16) videos ---------- */
.it-vid.tall .vbox{aspect-ratio:9/16}
.ytwrap.tall{aspect-ratio:9/16;width:auto;height:min(76vh,720px);max-width:100%;margin:0 auto}
.mform .ck{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink2);cursor:pointer}
.mform .ck input{width:16px;height:16px;accent-color:var(--acc)}

/* ---------- v4.11: zoom on the notes, pinch zoom ---------- */
.nzoom{height:28px;padding:0 8px;border:1px solid var(--line);border-radius:8px;background:var(--surf);font:600 12px Inter,sans-serif;color:var(--acc);cursor:pointer}
.nzoom[hidden]{display:none}
#viewer,.pscroll{touch-action:pan-x pan-y}

/* zoomed out: the note page shows as a sheet on grey, so its edges are clear */
.nz-out .pscroll{background:#E6E9F0;padding:16px 12px 24px}
.nz-out .pwrap{margin:0 auto;box-shadow:0 0 0 1px #d5dae4,0 4px 14px rgba(28,34,48,.12);border-radius:3px;background:var(--surf)}

/* ---------- v4.14: Pages tab with thumbnails ---------- */
.otabs{display:flex;gap:2px;background:#E6E9F0;border-radius:9px;padding:2px}
.otabs button{border:0;background:transparent;border-radius:7px;padding:5px 12px;font:600 12px Inter,sans-serif;color:var(--mut);cursor:pointer;text-transform:none;letter-spacing:0}
.otabs button[aria-selected="true"]{background:var(--surf);color:var(--ink);box-shadow:0 1px 2px rgba(28,34,48,.1)}
.ohead{padding:12px 10px 10px 12px}
.tlist{flex:1;overflow-y:auto;padding:4px 12px 20px;display:grid;grid-template-columns:1fr 1fr;gap:12px 10px;align-content:start}
.tlist[hidden],.olist[hidden]{display:none}
.thumb-p{position:relative;display:flex;flex-direction:column;align-items:center;gap:5px;border:0;background:transparent;padding:0;cursor:pointer;font:inherit}
.thumb-p .tim{display:block;width:100%;background:var(--surf);border-radius:4px;box-shadow:0 0 0 1px var(--line),0 1px 3px rgba(28,34,48,.08);overflow:hidden}
.thumb-p .tim canvas{display:block;width:100%;height:auto}
.thumb-p .tno{font-size:11px;color:var(--mut2);font-weight:600}
.thumb-p:hover .tim{box-shadow:0 0 0 2px #c9d3f7}
.thumb-p.on .tim{box-shadow:0 0 0 2.5px var(--acc)}
.thumb-p.on .tno{color:var(--acc)}
.thumb-p .tcount{position:absolute;top:6px;right:6px;min-width:20px;height:20px;padding:0 5px;box-sizing:border-box;border-radius:10px;background:var(--acc);color:#fff;font:700 11px/20px Inter,sans-serif;text-align:center}
.thumb-p .tcount[hidden]{display:none}

/* ---------- v4.15: tape ---------- */
svg.ann path.tape{pointer-events:visibleStroke;cursor:pointer;stroke-opacity:1;filter:drop-shadow(0 1px 1px rgba(0,0,0,.18))}
svg.ann path.tape.open{stroke-opacity:.16;filter:none}
body.t-tape .page svg.ann,body.t-tape .paper{cursor:var(--cur-hl)}
#tdot.d-tape{border-radius:3px;opacity:.85}
body.t-tape .page svg.ann,body.t-tape .page svg.ann *{cursor:none!important}

/* ---------- v4.16: clip tool ---------- */
body.t-clip .page svg.ann{cursor:crosshair}
.selbox.clipbox{border:2px dashed #3157F4;background:rgba(49,87,244,.06)}
/* 11 tools: keep the top bar on one line */
@media (max-width:1320px){.bar #save span,.bar #notesbtn>span{display:none}.bar #save,.bar #notesbtn{padding:0 10px}.bar .tools .tool{min-width:31px}}
@media (max-width:1100px){.bar label.btn.primary span{display:none}.bar label.btn.primary{padding:0 10px}}

/* ---------- v4.17: shapes ---------- */
.shapes{display:flex;gap:6px}
.shapes button{flex:1;height:36px;border:1px solid var(--line);border-radius:8px;background:var(--surf);cursor:pointer;display:flex;align-items:center;justify-content:center}
.shapes button.on{border-color:var(--acc);background:var(--accbg);color:var(--acc)}
.shapes button svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
body.t-shape .page svg.ann,body.t-shape .paper{cursor:crosshair}
@media (max-width:1220px){.bar .tools .tool{min-width:29px}}

/* shape choice: a small bar that drops down under the Shapes button while that tool is on */
.shapes.flyout{position:fixed;z-index:40;display:none;align-items:center;gap:2px;padding:5px 6px;background:var(--surf);border-radius:12px;
  box-shadow:0 0 0 1px rgba(49,87,244,.25),0 10px 28px rgba(28,34,48,.18)}
body.t-shape .shapes.flyout{display:flex}
.shapes.flyout::before{content:'';position:absolute;top:-6px;left:var(--caret,24px);width:12px;height:12px;background:var(--surf);transform:rotate(45deg);
  box-shadow:-1px -1px 0 rgba(49,87,244,.25)}
.shapes.flyout .slbl{font:600 11px Inter,sans-serif;color:var(--mut2);padding:0 6px 0 4px;letter-spacing:.02em}
.shapes.flyout button{position:relative;flex:none;width:34px;height:34px;border:0;border-radius:8px;background:transparent;color:var(--ink2);cursor:pointer;display:flex;align-items:center;justify-content:center}
.shapes.flyout button:hover{background:var(--hov)}
.shapes.flyout button.on{background:var(--accbg);color:var(--acc)}
.shapes.flyout button svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
body.t-shape .shapes.flyout{animation:flyin .18s ease-out}
@keyframes flyin{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* file name always visible: it shrinks (…) instead of disappearing, so nothing jumps */
.bar>.group:first-child{min-width:0;flex:0 1 auto}
.bar>.group:not(:first-child){flex:none}
.bar .name{display:block;min-width:24px;flex:0 1 auto}
@media (max-width:760px){.bar .name{display:none}}
body.loaded .bar label.btn.primary span{display:none}
body.loaded .bar label.btn.primary{padding:0 10px}
.bar .name{min-width:90px}
@media (max-width:1500px){.bar #save span,.bar #notesbtn>span{display:none}.bar #save,.bar #notesbtn{padding:0 10px}}
@media (max-width:1400px){#zout,#zin{display:none}}

/* text style: drops down under the Text button (like Shapes) – the top bar never changes */
body.t-text .tools > .popwrap:has(#colorbtn){visibility:hidden}
#tbar.flyout{position:fixed;z-index:40;display:none;align-items:center;gap:2px;padding:5px 6px;margin:0;background:var(--surf);border:0;border-radius:12px;flex-wrap:nowrap;overflow:visible;
  box-shadow:0 0 0 1px rgba(49,87,244,.25),0 10px 28px rgba(28,34,48,.18);animation:flyin .18s ease-out}
body.t-text #tbar.flyout,#tbar.flyout.on{display:flex}
#tbar.flyout::before{content:'';position:absolute;top:-6px;left:var(--caret,24px);width:12px;height:12px;background:var(--surf);transform:rotate(45deg);box-shadow:-1px -1px 0 rgba(49,87,244,.25)}

/* ---------- v4.20: pen presets (drop down under Pen / Highlighter) ---------- */
.presets.flyout{position:fixed;z-index:40;display:none;align-items:center;gap:2px;padding:5px 6px;background:var(--surf);border-radius:12px;
  box-shadow:0 0 0 1px rgba(49,87,244,.25),0 10px 28px rgba(28,34,48,.18);animation:flyin .18s ease-out}
body.t-pen .presets.flyout,body.t-hl .presets.flyout{display:flex}
.presets.flyout::before{content:'';position:absolute;top:-6px;left:var(--caret,24px);width:12px;height:12px;background:var(--surf);transform:rotate(45deg);box-shadow:-1px -1px 0 rgba(49,87,244,.25)}
.presets.flyout .slbl{font:600 11px Inter,sans-serif;color:var(--mut2);padding:0 6px 0 4px}
.preset{position:relative;width:46px;height:34px;border:0;border-radius:8px;background:transparent;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0 8px}
.preset i{display:block;width:100%;border-radius:4px}
.preset small{position:absolute;right:3px;bottom:1px;font:600 9px Inter,sans-serif;color:var(--mut2)}
.preset:hover{background:var(--hov)}
.preset.on{background:var(--accbg);box-shadow:inset 0 0 0 1.5px var(--acc)}

/* ---------- v4.21: stamps (in the Shapes drop-down) ---------- */
.shapes.flyout .ssep{width:1px;height:22px;background:var(--line);margin:0 4px 0 6px}
.shapes.flyout .stb i{display:flex;width:22px;height:22px;border-radius:50%;color:#fff;font:700 13px/22px Inter,sans-serif;align-items:center;justify-content:center;font-style:normal;box-shadow:0 0 0 1.5px #fff,0 1px 3px rgba(0,0,0,.2)}
svg.ann g.stamp{filter:drop-shadow(0 1px 1.5px rgba(0,0,0,.25))}
body:not(.drawing) svg.ann g.stamp{pointer-events:none}

/* ---------- v4.22: Revise tab (v4.23 look) ---------- */
.otabs button{padding:5px 9px}
.rlist{flex:1;overflow-y:auto;padding:2px 10px 20px;display:flex;flex-direction:column;gap:12px}
.rlist[hidden]{display:none}
.rhead{display:flex;align-items:center;justify-content:space-between;padding:2px 4px 0;font-size:13px;color:var(--mut)}
.rhead b{color:var(--ink);font-size:15px}
.rnav{display:flex;gap:4px}
.rnav button{width:32px;height:30px;border:1px solid var(--line);background:var(--surf);border-radius:8px;font-size:18px;line-height:1;color:var(--ink2);cursor:pointer}
.rnav button:hover{border-color:var(--acc);color:var(--acc)}
.rchips{display:flex;flex-wrap:wrap;gap:5px}
.rchip{display:inline-flex;align-items:center;gap:5px;height:28px;border:1px solid var(--line);background:var(--surf);border-radius:14px;padding:0 9px 0 7px;font:600 12px Inter,sans-serif;color:var(--ink2);cursor:pointer}
.rchip em{font-style:normal;font-weight:700;font-size:11px;color:var(--mut2)}
.rchip.on{background:var(--ink);border-color:var(--ink);color:#fff}.rchip.on em{color:#c9cfdb}
.rchip:first-child{padding-left:10px}
.rg{display:inline-flex;align-items:center;justify-content:center;width:17px;height:17px;border-radius:50%;color:#fff;font:700 10px/1 Inter,sans-serif;flex:none}
.rg.rgt{border-radius:3px;width:16px;height:9px;background:#f5a623}
.rg.rgh{border-radius:3px;width:16px;height:9px;background:#ffe14d}
.rg.rgn{border-radius:3px;width:12px;height:14px;background:var(--acc)}
.rrows{display:flex;flex-direction:column;gap:6px}
.rrow{display:flex;gap:10px;align-items:center;text-align:left;border:0;background:var(--surf);border-radius:12px;padding:8px 10px 8px 8px;cursor:pointer;font:inherit;
  box-shadow:0 1px 2px rgba(28,34,48,.06),0 0 0 1px var(--line)}
.rrow:hover{box-shadow:0 2px 8px rgba(28,34,48,.08),0 0 0 1px #d5dbe7}
.rrow.on{box-shadow:0 0 0 2px var(--acc)}
.rnum{flex:none;width:46px;height:46px;border-radius:10px;background:var(--accbg);color:var(--acc);display:flex;flex-direction:column;align-items:center;justify-content:center;font:700 17px/1 'Space Grotesk',Inter,sans-serif}
.rnum small{font:600 9px Inter,sans-serif;text-transform:uppercase;letter-spacing:.06em;opacity:.75;margin-bottom:2px}
.rrow.on .rnum{background:var(--acc);color:#fff}
.rbody{min-width:0;display:flex;flex-direction:column;gap:5px}
.rc{font-size:12.5px;font-weight:600;color:var(--ink2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-transform:capitalize}
.rb{display:flex;flex-wrap:wrap;gap:4px;align-items:center}
.rb small{font:700 10px Inter,sans-serif;color:var(--mut);margin:0 3px 0 -1px}
.rtag{font:600 10.5px Inter,sans-serif;padding:2px 6px;border-radius:6px}
.rtag.rtag-t{background:#fdebc8;color:#8a5800}.rtag.rtag-h{background:#fff4b8;color:#6e5f00}.rtag.rtag-n{background:var(--accbg);color:var(--acc)}
.rempty{text-align:center;padding:30px 12px;color:var(--mut);font-size:13px;line-height:1.5}
.rempty .rei{width:46px;height:46px;margin:0 auto 10px;border-radius:50%;background:#fff3d6;color:#f2a900;font-size:22px;line-height:46px}
.rempty b{color:var(--ink)}

/* Revise filters: an even grid of small tiles (icon + count, name below) */
.rchips{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.rchip{height:auto;display:flex;flex-direction:column;align-items:flex-start;gap:3px;padding:7px 8px!important;border-radius:10px;border:1px solid var(--line);background:var(--surf);text-align:left}
.rchip .rtop{display:flex;align-items:center;gap:6px;width:100%}
.rchip em{font:700 15px/1 'Space Grotesk',Inter,sans-serif;color:var(--ink);font-style:normal}
.rchip .rlbl{font:600 10.5px Inter,sans-serif;color:var(--mut);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.rchip:hover{border-color:#c9d3f7}
.rchip.on{background:var(--accbg);border-color:var(--acc);box-shadow:inset 0 0 0 1px var(--acc)}
.rchip.on em{color:var(--acc)}.rchip.on .rlbl{color:var(--acc)}
.rg.rga{background:var(--ink2);color:var(--surf);font-size:11px}

/* ---------- v4.26: revision rounds ---------- */
.rprog{height:6px;border-radius:3px;background:var(--line);overflow:hidden;margin:-4px 4px 0}
.rprog i{display:block;height:100%;background:linear-gradient(90deg,#2e7d32,#57b45c);border-radius:3px}
.rprogl{font-size:11px;color:var(--mut2);margin:-8px 4px 0}
.rg.rgd{background:#7c3aed;font-size:9px}
.rrow{position:relative;padding-right:44px}
.rv{font-size:11px;color:var(--mut)}
.rv.rnew{color:var(--mut2);font-style:italic}
.rv.rdue{color:#b45309;font-weight:600}
.rdone{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:28px;height:28px;border-radius:50%;border:1.5px solid var(--line);color:#b7bfcc;
  display:flex;align-items:center;justify-content:center;font:700 14px/1 Inter,sans-serif;background:var(--surf)}
.rdone:hover{border-color:#2e7d32;color:#2e7d32}
.rdone.on{background:#2e7d32;border-color:#2e7d32;color:#fff}

/* ---------- v4.27: Quick look ---------- */
.qlbtn{width:100%;height:36px;border:0;border-radius:10px;background:linear-gradient(90deg,#3157F4,#5b7bff);color:#fff;font:600 12.5px Inter,sans-serif;cursor:pointer;box-shadow:0 2px 8px rgba(49,87,244,.3)}
.qlbtn:hover{filter:brightness(1.06)}
.qlook{position:fixed;inset:0;z-index:60;background:rgba(20,26,40,.45);display:flex;justify-content:center;padding:24px 16px}
.qlook[hidden]{display:none}
.qlpanel{width:min(820px,100%);background:var(--bg);border-radius:16px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.qlpanel header{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--surf);border-bottom:1px solid var(--line)}
.qlpanel header b{font:700 16px 'Space Grotesk',Inter,sans-serif}
.qlpanel header select{height:32px;border:1px solid var(--line);border-radius:8px;padding:0 6px;max-width:300px;font-size:13px}
.qlcount{margin-left:auto;font-size:12px;color:var(--mut2)}
.qlbody{flex:1;overflow-y:auto;padding:6px 18px 30px}
.qlbody h4{margin:18px 2px 8px;font:700 12px Inter,sans-serif;color:var(--acc);text-transform:uppercase;letter-spacing:.04em}
.qlcut{position:relative;background:var(--surf);border-radius:10px;overflow:hidden;margin-bottom:10px;min-height:40px;cursor:pointer;box-shadow:0 1px 2px rgba(28,34,48,.06),0 0 0 1px var(--line)}
.qlcut:hover{box-shadow:0 0 0 2px #c9d3f7}
.qlcut canvas{display:block;width:100%;height:auto}
.qltape{position:absolute;border:0;border-radius:2px;cursor:pointer;box-shadow:0 1px 2px rgba(0,0,0,.2);padding:0}
.qltape.open{opacity:.15}
/* v4.28: keep the mark tags inside the Revise cards */
.rrow{overflow:hidden}
.rbody{flex:1 1 auto;min-width:0}
.rrow .rb{justify-content:flex-start}
.rtag{white-space:nowrap}

/* Quick look: a small button in the Revise header, next to ‹ › */
.rhead{gap:6px}
.rnav .qlbtn{width:auto;height:30px;padding:0 10px;border:1px solid #c9d3f7;border-radius:8px;background:var(--accbg);color:var(--acc);font:600 12px Inter,sans-serif;box-shadow:none;cursor:pointer;white-space:nowrap}
.rnav .qlbtn:hover{background:var(--acc);color:#fff;border-color:var(--acc);filter:none}
.rhead>div:first-child{white-space:nowrap}
.rnav{gap:4px}.rnav button[data-go]{width:28px}
.rnav .qlbtn{padding:0 8px}

/* ---------- v4.30: Revise button in the top bar ---------- */
.revbtn .count.due{background:#e65100;color:#fff}
.revbtn .count.due:empty{display:none}
.revbtn[aria-pressed="true"]{background:var(--accbg);color:var(--acc);border-color:#c9d3f7}
@media (max-width:1500px){.bar #revbtn>span{display:none}.bar #revbtn{padding:0 10px}}
#revbtn.pulse{animation:revpulse 1s ease-in-out 4}
@keyframes revpulse{0%,100%{box-shadow:0 0 0 0 rgba(230,81,0,0)}50%{box-shadow:0 0 0 6px rgba(230,81,0,.25)}}

/* ---------- v4.31: roomier Revise panel ---------- */
body.side-rv .outline{width:300px}
.rlist{gap:16px;padding:6px 14px 0}
.rsec{display:flex;flex-direction:column;gap:8px}
.rlab{font:700 10.5px Inter,sans-serif;text-transform:uppercase;letter-spacing:.07em;color:var(--mut2);padding:0 2px}
.rlabrow{display:flex;align-items:center;justify-content:space-between;margin-bottom:-6px}
.rsum{background:var(--surf);border-radius:12px;padding:12px 14px;box-shadow:0 0 0 1px var(--line)}
.rsumtop{display:flex;align-items:baseline;justify-content:space-between;font-size:12.5px;color:var(--mut)}
.rsumtop b{font:700 22px/1 'Space Grotesk',Inter,sans-serif;color:var(--ink)}
.rsum .rprog{margin:0;height:7px}
.rprogl{display:none}
.rchips{gap:8px}
.rchip{padding:9px 10px!important;gap:4px}
.rnav{gap:4px}
.rnav button[data-go]{width:30px;height:28px;border:1px solid var(--line);background:var(--surf);border-radius:8px;font-size:17px;line-height:1;color:var(--ink2);cursor:pointer}
.rrows{gap:8px}
.rrow{padding:10px 46px 10px 10px;gap:12px}
.rbody{gap:6px}
.rfoot{position:sticky;bottom:0;margin:0 -14px;padding:12px 14px 14px;background:linear-gradient(180deg,rgba(246,247,251,0),var(--bar) 35%)}
.rfoot .qlbtn{width:100%;height:42px;display:flex;align-items:center;justify-content:center;gap:8px;border:1px solid #c9d3f7;border-radius:12px;background:var(--surf);color:var(--acc);
  font:700 13px Inter,sans-serif;box-shadow:0 4px 14px rgba(49,87,244,.12);cursor:pointer}
.rfoot .qlbtn small{font-weight:500;color:var(--mut2);font-size:11.5px}
.rfoot .qlbtn:hover{background:var(--accbg)}

/* ---------- v4.32: bookmarks ---------- */
.bmlist{padding:4px 12px 10px;border-bottom:1px solid var(--line);margin-bottom:6px}
.bmlist[hidden]{display:none}
.bmhead{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-bottom:6px}
.bmhead span{font:700 10.5px Inter,sans-serif;text-transform:uppercase;letter-spacing:.07em;color:var(--mut2)}
.bmadd{border:1px solid #c9d3f7;background:var(--accbg);color:var(--acc);border-radius:8px;height:26px;padding:0 8px;font:600 11.5px Inter,sans-serif;cursor:pointer;white-space:nowrap}
.bmadd:hover{background:var(--acc);color:#fff}
.bmrow{display:flex;align-items:center;gap:8px;padding:5px 4px 5px 6px;border-radius:8px;cursor:pointer}
.bmrow:hover{background:var(--surf)}
.bmn{flex:none;min-width:22px;height:20px;border-radius:5px;background:#f2a900;color:#fff;font:700 10.5px/20px Inter,sans-serif;text-align:center;padding:0 4px}
.bmt{flex:1;min-width:0;font-size:13px;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-transform:capitalize}
.bmin{flex:1;min-width:0;height:26px;border:1px solid var(--acc);border-radius:6px;padding:0 6px;font:13px Inter,sans-serif}
.bmed,.bmx{flex:none;width:22px;height:22px;border:0;background:transparent;border-radius:5px;color:var(--mut2);cursor:pointer;opacity:0;font-size:13px}
.bmrow:hover .bmed,.bmrow:hover .bmx{opacity:1}
.bmed:hover,.bmx:hover{background:var(--hov);color:var(--ink)}
.bmempty{font-size:12px;color:var(--mut2);margin:2px 2px 0}
.bmrib{position:absolute;top:-2px;right:28px;width:18px;height:28px;border:0;padding:0;cursor:pointer;z-index:3;background:#f2a900;
  clip-path:polygon(0 0,100% 0,100% 100%,50% 75%,0 100%);filter:drop-shadow(0 1px 1px rgba(0,0,0,.25));pointer-events:auto}
.bmrib:hover{background:#ffb300}
.bmhead span{white-space:nowrap}

/* ---------- v4.34: night mode ---------- */
:root{--surf:#fff;--surf2:#F6F7FB;--hov:#F1F3F8;--ink2:#3A4254;--mut2:#8A93A6;--paper:#fff}
body.dark{--bg:#12151c;--bar:#1a1e27;--surf:#222733;--surf2:#1e2330;--hov:#2b3140;--ink:#e6e9f0;--ink2:#c9cfdb;--mut:#9aa3b5;--mut2:#7d8699;--line:#323949;
  --acc:#6d8bff;--accbg:#27304d;--paper:#ECE8DF;color-scheme:dark}
body.dark .page{box-shadow:0 0 0 1px #2b3140,0 4px 18px rgba(0,0,0,.5)}
body.dark .paper{background-color:var(--paper)}
body.dark .npage,body.dark .welcome .card,body.dark .ccard{background:var(--surf)}
body.dark .tool{color:var(--ink2)}
body.dark select,body.dark input{background:var(--surf);color:var(--ink);border-color:var(--line)}
body.dark .pop,body.dark .menu,body.dark .flyout,body.dark .modal .box{background:var(--surf);color:var(--ink)}
body.dark .flyout::before{background:var(--surf)}
body.dark .bmrib{filter:none}
/* dark PDF pages (optional): flip the page picture, keep your marks' colours readable */
body.dark.darkpages .page canvas{filter:invert(.9) hue-rotate(180deg) brightness(1.05)}
body.dark.darkpages .ann .hl{mix-blend-mode:screen;stroke-opacity:.35}
body.dark.darkpages .qlcut canvas,body.dark.darkpages .thumb-p canvas{filter:invert(.9) hue-rotate(180deg)}
body.dark .nz-out .pwrap{background:var(--paper)}
.menu .mtog{display:flex;align-items:center;justify-content:space-between;gap:12px}
.menu .mtog i{width:30px;height:18px;border-radius:9px;background:var(--line);position:relative;flex:none;transition:.15s}
.menu .mtog i::after{content:'';position:absolute;left:2px;top:2px;width:14px;height:14px;border-radius:50%;background:#fff;transition:.15s;box-shadow:0 1px 2px rgba(0,0,0,.3)}
.menu .mtog[aria-checked="true"] i{background:var(--acc)}
.menu .mtog[aria-checked="true"] i::after{left:14px}
.menu .mtog[disabled]{opacity:.45}
body.dark.darkpages .ann .hl{mix-blend-mode:normal;stroke-opacity:.42}
body:not(.loaded) #revbtn{display:none}

/* ---------- v4.35: comments ---------- */
svg.ann g.cmt{pointer-events:auto;cursor:pointer}
.shapes.flyout .stb i{font-size:11px}
.cmpop{position:fixed;z-index:70;width:290px;background:var(--surf);border-radius:12px;box-shadow:0 0 0 1px rgba(255,152,0,.35),0 14px 36px rgba(28,34,48,.22);overflow:hidden;animation:flyin .15s ease-out}
.cmhead{display:flex;align-items:center;gap:8px;padding:8px 10px;background:#fff3e0;border-bottom:1px solid #ffe0b2}
.cmhead b{font-size:13px;color:#8a4b00}.cmhead span{font-size:11px;color:#a06a2a;margin-right:auto}
.cmhead button{height:26px;padding:0 9px;border-radius:7px;border:1px solid #ffcc80;background:#fff;font:600 11.5px Inter,sans-serif;cursor:pointer;color:#8a4b00}
.cmhead .cmok{background:#ff9800;border-color:#ff9800;color:#fff}
.cmhead .cmdel:hover{border-color:#c62828;color:#c62828}
.cmpop textarea{display:block;width:100%;min-height:110px;border:0;outline:0;resize:vertical;padding:10px 12px;font:13.5px/1.45 Inter,sans-serif;background:var(--surf);color:var(--ink)}
body.dark .cmhead{background:#3a2c17;border-color:#5a4220}body.dark .cmhead b,body.dark .cmhead span{color:#ffcc80}
svg.ann g.stamp.cmt{pointer-events:auto!important}

/* ---------- v4.36: Search (OCR) ---------- */
.otabs .otab-s{display:flex;align-items:center;padding:5px 8px}
.otabs .otab-s svg{width:15px;height:15px}
body.side-sr .outline{width:300px}
.slist{flex:1;overflow-y:auto;padding:4px 12px 20px;display:flex;flex-direction:column;gap:12px}
.slist[hidden]{display:none}
.sbox{display:flex;align-items:center;gap:4px;background:var(--surf);border:1.5px solid var(--line);border-radius:10px;padding:0 4px 0 9px;height:38px}
.sbox:focus-within{border-color:var(--acc);box-shadow:0 0 0 3px var(--accbg)}
.sbox svg{width:16px;height:16px;color:var(--mut2);flex:none}
.sbox input{flex:1;min-width:0;border:0;outline:0;background:transparent;font:14px Inter,sans-serif;color:var(--ink)}
.sbox #scount{font:600 11.5px Inter,sans-serif;color:var(--mut2);white-space:nowrap}
.snav{width:26px;height:28px;border:0;background:transparent;border-radius:6px;font-size:17px;color:var(--ink2);cursor:pointer}
.snav:hover{background:var(--hov)}
.sstat{background:var(--surf);border-radius:10px;padding:10px 12px;box-shadow:0 0 0 1px var(--line);font-size:12.5px;color:var(--mut)}
.sstat .sline{display:flex;align-items:center;justify-content:space-between;gap:8px}
.sstat b{color:var(--ink)}
.sstat .btn.small{height:28px;padding:0 10px;font-size:12px}
.sbar{height:5px;border-radius:3px;background:var(--line);margin-top:8px;overflow:hidden}
.sbar i{display:block;height:100%;background:var(--acc);border-radius:3px;transition:width .4s}
.snote{font-size:12px;color:var(--mut2);margin:8px 0 0;line-height:1.45}
.sok{color:#2e7d32;font-weight:600}
.sres{display:flex;flex-direction:column;gap:3px}
.shitrow{display:flex;gap:8px;align-items:baseline;text-align:left;border:0;background:transparent;border-radius:8px;padding:7px 8px;cursor:pointer;font:inherit;color:var(--ink2)}
.shitrow:hover{background:var(--surf)}
.shitrow.on{background:var(--surf);box-shadow:inset 0 0 0 1.5px var(--acc)}
.shitrow .sp{flex:none;font:700 11px Inter,sans-serif;color:var(--acc);min-width:34px}
.shitrow .ss{font-size:12.5px;line-height:1.4;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.shitrow mark{background:#ffe14d;color:#1d2330;border-radius:2px;padding:0 1px}
.shit{position:absolute;z-index:2;background:rgba(255,193,7,.35);outline:1.5px solid rgba(230,150,0,.8);border-radius:2px;pointer-events:none}
.shit.on{background:rgba(255,120,0,.4);outline:2.5px solid #ff6d00;animation:shitp 1s ease-out 1}
@keyframes shitp{0%{outline-offset:6px}100%{outline-offset:0}}

/* ---------- v4.37: side panel keeps one width on every tab ---------- */
body .outline{width:300px}
@media (max-width:760px){body .outline{width:85%}}
.ohead{gap:8px}
.otabs{flex:1 1 auto;min-width:0}
.otabs button{flex:1 1 auto}
#oclose{flex:none}
body.dark .otabs{background:var(--hov)}
/* clip modes drop down under the Clip button */
.clipm.flyout{position:fixed;z-index:40;display:none;align-items:center;gap:2px;padding:5px 6px;background:var(--surf);border-radius:12px;
  box-shadow:0 0 0 1px rgba(49,87,244,.25),0 10px 28px rgba(28,34,48,.18);animation:flyin .18s ease-out}
body.t-clip .clipm.flyout{display:flex}
.clipm.flyout::before{content:'';position:absolute;top:-6px;left:var(--caret,24px);width:12px;height:12px;background:var(--surf);transform:rotate(45deg);box-shadow:-1px -1px 0 rgba(49,87,244,.25)}
.clipm .slbl{font:600 11px Inter,sans-serif;color:var(--mut2);padding:0 6px 0 4px}
.clipm button{height:32px;padding:0 10px;border:0;border-radius:8px;background:transparent;color:var(--ink2);font:600 12px Inter,sans-serif;cursor:pointer;white-space:nowrap}
.clipm button:hover{background:var(--hov)}
.clipm button.on{background:var(--accbg);color:var(--acc)}

/* ---------- v4.38: snappier tool switching; night-mode fixes ---------- */
/* pages and thumbnails off screen are skipped by the browser when styles change (big PDFs) */
.page{content-visibility:auto}
.thumb-p{content-visibility:auto;contain-intrinsic-size:auto 160px}
.tool,.tool svg{transition:none}
/* night mode: menu hover, text-style selects, tool bar pill */
.menu button:hover,.menu .mi:hover{background:var(--hov)}
.menu button,.menu .mi{color:var(--ink)}
#tbar.flyout select{color:var(--ink);background:var(--surf);border-color:var(--line)}
body.dark #tbar.flyout select option{background:var(--surf);color:var(--ink)}
body.dark .bar .tools{background:var(--surf)}
body.dark .colorbtn{background:var(--surf2)}
body.dark .tb{color:var(--ink2)}
body.dark .tb[aria-pressed="true"]{background:var(--accbg);color:var(--acc)}
body.dark .mhead{color:var(--mut2)}

/* v4.39 night mode: anything still using light hover / pressed colours */
body.dark .icon[aria-expanded="true"],body.dark .colorbtn[aria-expanded="true"]{background:var(--hov)}
body.dark .zoomlbl,body.dark .pagenum input,body.dark #pagenum{color:var(--ink);background:var(--surf);border-color:var(--line)}
body.dark .btn{background:var(--surf);color:var(--ink);border-color:var(--line)}
body.dark .btn:hover{background:var(--hov)}
body.dark .btn.primary{background:var(--acc);border-color:var(--acc);color:#fff}
body.dark .sizes button{background:var(--surf);color:var(--ink2);border-color:var(--line)}
body.dark .sizes button.on{background:var(--accbg)}
body.dark .poplbl{color:var(--mut2)}
body.dark .otabs button{color:var(--mut)}
body.dark .otabs button[aria-selected="true"]{background:var(--surf);color:var(--ink)}
body.dark .bmadd{background:var(--accbg);border-color:#3a4870;color:var(--acc)}
body.dark .thumb-p .tim{box-shadow:0 0 0 1px var(--line)}

/* your own chapters (bookmarks) inside the chapter list */
.oitem.bm{position:relative}
.oitem.bm i{flex:none;font-style:normal;color:#f2a900;font-size:12px;margin-right:6px}
.oitem.bm .bmed,.oitem.bm .bmx{font-style:normal;position:absolute;top:50%;transform:translateY(-50%);width:22px;height:22px;border-radius:5px;display:none;align-items:center;justify-content:center;color:var(--mut2);background:var(--surf)}
.oitem.bm .bmed{right:32px}.oitem.bm .bmx{right:8px}
.oitem.bm:hover .bmed,.oitem.bm:hover .bmx{display:flex}
.oitem.bm:hover small{visibility:hidden}
.oitem.bm .bmed:hover,.oitem.bm .bmx:hover{background:var(--hov);color:var(--ink)}
.oitem.bm.edit{display:flex;align-items:center;gap:4px}
.oitem.bm.edit .bmin{flex:1}
.bmlist{border-bottom:0;margin-bottom:0;padding-bottom:2px}
.oitem.bm span{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.oitem.bm.edit{padding:4px 6px 4px 10px;background:var(--surf);box-shadow:0 0 0 1.5px var(--acc)}
.bmdel{flex:none;height:26px;padding:0 9px;border:1px solid var(--line);border-radius:7px;background:var(--surf);color:#c62828;font:600 11.5px Inter,sans-serif;cursor:pointer}
.bmdel:hover{background:#c62828;color:#fff;border-color:#c62828}

/* ---------- v4.41: Search button in the top bar ---------- */
.searchbtn svg{width:16px;height:16px}
.searchbtn[aria-pressed="true"]{background:var(--accbg);color:var(--acc);border-color:#c9d3f7}
body:not(.loaded) #searchbtn{display:none}
@media (max-width:1500px){.bar #searchbtn>span{display:none}.bar #searchbtn{padding:0 10px}}

/* ---------- v4.43: flashcards from tape ---------- */
.rfoot{display:flex;gap:8px}
.rfoot .qlbtn{flex:1}
.rfoot .fcbtn{flex:1.2;height:42px;display:flex;align-items:center;justify-content:center;gap:7px;border:0;border-radius:12px;background:var(--acc);color:#fff;font:700 13px Inter,sans-serif;cursor:pointer;box-shadow:0 4px 14px rgba(49,87,244,.3)}
.rfoot .fcbtn:hover{filter:brightness(1.07)}
.fcdue{min-width:18px;height:18px;border-radius:9px;background:#e65100;color:#fff;font:700 11px/18px Inter,sans-serif;padding:0 5px}
.fcdue:empty{display:none}
.qlook.fcmode{align-items:flex-start}
.fcpanel{max-width:780px;height:auto;max-height:100%}
.fcprog{font:700 12px Inter,sans-serif;color:var(--acc);background:var(--accbg);border-radius:10px;padding:3px 9px}
.fcbar{height:4px;background:var(--line)}.fcbar i{display:block;height:100%;background:var(--acc);transition:width .3s}
.fcbody{padding:22px 24px 20px;display:flex;flex-direction:column;align-items:center;gap:14px}
.fccard{position:relative;width:100%;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 1px 3px rgba(28,34,48,.1),0 0 0 1px var(--line)}
.fccard canvas{display:block;width:100%;height:auto}
.fccard .qltape{transition:opacity .25s}
.fchint{margin:0;font-size:14px;color:var(--mut)}
.fcbtns{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.fcbtns .btn{height:44px;padding:0 20px;font-size:14px;border-radius:12px}
.fcbtns kbd{font:600 10.5px Inter,sans-serif;opacity:.6;margin-left:6px;border:1px solid currentColor;border-radius:4px;padding:0 4px}
.fcno{border-color:#f3c0c0!important;color:#c62828!important}.fcno:hover{background:#c62828!important;color:#fff!important}
.fcyes{border-color:#b9dfbb!important;color:#2e7d32!important}.fcyes:hover{background:#2e7d32!important;color:#fff!important}
.fcopen{border:0;background:transparent;color:var(--mut2);font-size:12px;text-decoration:underline;cursor:pointer}
.fcend{padding:40px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px}
.fcend .fcbig{font-size:44px}.fcend b{font-size:18px}.fcend p{margin:0 0 10px;color:var(--mut)}
.fcbtns .btn[hidden]{display:none}
.fccard{align-self:center}

/* v4.44 flashcard context */
.fcctx{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:-4px}
.fcseg{display:inline-flex;align-items:center;gap:2px;font:600 11.5px Inter,sans-serif;color:var(--mut);background:var(--surf2);border-radius:9px;padding:3px 3px 3px 9px}
.fcseg button{border:0;background:transparent;color:var(--mut);font:700 11.5px Inter,sans-serif;width:26px;height:22px;border-radius:7px;cursor:pointer}
.fcseg button:first-of-type{margin-left:6px}
.fcseg button.on{background:var(--surf);color:var(--acc);box-shadow:0 1px 2px rgba(0,0,0,.12)}
.fcmore{border:1px solid var(--line);background:var(--surf);color:var(--ink2);font:600 12px Inter,sans-serif;height:28px;padding:0 11px;border-radius:9px;cursor:pointer}
.fcmore:hover:not(:disabled){border-color:var(--acc);color:var(--acc)}
.fcmore:disabled{opacity:.5;cursor:default}
.fcbody{overflow:auto}
.fcbody{position:relative}.fccard.fcdraw{position:absolute;visibility:hidden;left:0;top:0}

/* v4.45 line icons instead of emoji */
.ei{width:1.15em;height:1.15em;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;vertical-align:-.2em;margin-right:.4em;flex:none}
.stb i .ei{margin:0;width:15px;height:15px;color:#fff}
.rg .ei{margin:0;width:12px;height:12px;color:#fff;stroke-width:2.3;vertical-align:middle}
.fcbtn span .ei{margin:0;width:17px;height:17px}
.fcbig .ei{width:56px;height:56px;margin:0;color:#2e7d32;stroke-width:1.6}
.qlpanel header b .ei,.fcpanel header b .ei{color:var(--acc)}
.cmhead b .ei{color:#ff9800}
.clipm button .ei{width:15px;height:15px}
.qlbtn span .ei{margin:0;width:16px;height:16px}
.mtog span{display:inline-flex;align-items:center}

/* v4.46 menu items only with a PDF open; folder loading */
body:not(.loaded) .menu .mdoc{display:none}
.floading{display:inline-flex;align-items:center;gap:8px}
.spin{width:14px;height:14px;border-radius:50%;border:2px solid var(--line);border-top-color:var(--acc);animation:wmspin .8s linear infinite}
@keyframes wmspin{to{transform:rotate(360deg)}}
.card.skel{pointer-events:none;padding:12px;display:flex;flex-direction:column;gap:10px}
.skel .sk-th{aspect-ratio:3/4;border-radius:8px}
.skel .sk-l{height:11px;border-radius:6px;width:85%}.skel .sk-l.s{width:50%}
.skel .sk-th,.skel .sk-l{background:linear-gradient(90deg,var(--surf2) 0%,var(--hov) 50%,var(--surf2) 100%);background-size:200% 100%;animation:wmshim 1.3s ease-in-out infinite}
@keyframes wmshim{from{background-position:100% 0}to{background-position:-100% 0}}
.card.skel{background:var(--surf);border:1px solid var(--line);border-radius:12px}

/* v4.47 make PDF faster */
.fastbox{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:60;width:min(420px,calc(100vw - 32px));background:var(--surf);color:var(--ink);border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.18);padding:16px 18px;display:flex;flex-direction:column;gap:8px}
.fastbox b{display:flex;align-items:center;gap:9px;font-size:14px}
.fastbox p{margin:0;font-size:12.5px;color:var(--mut)}
.fastbar{height:6px;border-radius:3px;background:var(--hov);overflow:hidden}.fastbar i{display:block;height:100%;width:0;background:var(--acc);transition:width .3s}
.fastrow{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--mut)}
.fastopt{display:flex;gap:8px;margin-top:4px}
.fastopt .btn{flex:1;height:auto;padding:10px 12px;display:flex;flex-direction:column;align-items:flex-start;gap:3px;text-align:left;border-radius:10px}
.fastopt .btn b{font-size:13px}.fastopt .btn span{font-size:11.5px;color:var(--mut);font-weight:400;line-height:1.35}
.fastopt .btn:hover{border-color:var(--acc)}
.fastopt .btn.pick{border-color:var(--acc);background:var(--accbg)}
.fastopt .btn{min-width:0;white-space:normal}

/* v4.51 friendlier file names */
.ftag{font-style:normal;font:700 10px Inter,sans-serif;letter-spacing:.03em;text-transform:uppercase;color:#1b7a3a;background:#e3f5e8;border-radius:5px;padding:2px 5px;vertical-align:2px;margin-left:4px}
body.dark .ftag{color:#7fd69a;background:rgba(46,160,90,.18)}
.cbody{min-width:0}
.ccard .cname{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;white-space:normal;overflow:hidden;overflow-wrap:anywhere}
.bar .name .ftag{font-size:9px;vertical-align:1px}

/* ---------- v4.52 menu bar: File · Edit · View · Search · Revise · Help ---------- */
.menubar{display:flex;align-items:center;gap:14px;height:44px;padding:0 14px;background:var(--bar);position:relative;z-index:12}
.menubar .mleft{display:flex;align-items:center;gap:8px;flex:none}
.menubar .brand,.menubar .brand svg{width:30px;height:30px;margin:0}
.menubar .wordmark{display:none;font-family:'Space Grotesk',Inter,sans-serif;font-weight:700;font-size:19px;margin-right:10px}
body:not(.loaded) .menubar .wordmark{display:inline}
.mms{display:flex;align-items:center;gap:1px}
.mm{position:relative}
.mmb{border:0;background:none;color:var(--ink2,var(--ink));font:500 13.5px Inter,sans-serif;height:30px;padding:0 10px;border-radius:7px;cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.mmb:hover,.mm.open>.mmb{background:var(--hov);color:var(--ink)}
.mcount:empty{display:none}
.mcount{font:700 10.5px Inter,sans-serif;min-width:17px;height:17px;padding:0 5px;border-radius:9px;background:#f57c00;color:#fff;display:inline-flex;align-items:center;justify-content:center}
.mdrop{position:absolute;left:0;top:34px;min-width:260px;background:var(--surf);color:var(--ink);border-radius:12px;padding:6px;display:flex;flex-direction:column;z-index:50;
  box-shadow:0 0 0 1px var(--line),0 14px 36px rgba(28,34,48,.18);animation:flyin .12s ease-out}
.mdrop[hidden]{display:none}
.mdrop hr{border:0;border-top:1px solid var(--line);margin:5px 6px}
.mdrop .mhead{margin:6px 12px 2px;font:700 10.5px Inter,sans-serif;letter-spacing:.06em;text-transform:uppercase;color:var(--mut)}
.mi2{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%;border:0;background:none;color:inherit;text-align:left;font:400 13.5px Inter,sans-serif;padding:8px 12px;border-radius:8px;cursor:pointer}
.mi2:hover{background:var(--hov)}
.mi2 kbd{font:500 11.5px Inter,sans-serif;color:var(--mut);background:none;border:0;padding:0}
.mi2 > span{display:inline-flex;align-items:center}
.mdrop .mtog i{flex:none}
.mdrop .mstatus{margin:4px 12px 6px;font-size:12px;color:var(--mut)}
body:not(.loaded) .menubar .mdoc{display:none}
.menubar .name{flex:1;min-width:0;max-width:none;margin:0;text-align:center;font:600 14px Inter,sans-serif;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.menubar .mright{display:flex;align-items:center;gap:4px;flex:none}
.menubar .mright .icon{width:30px;height:30px}
.menubar #pagenum{height:30px}
/* tools row under it */
body:not(.loaded) .bar{display:none}
.bar{min-height:56px;padding:6px 14px 8px}
.bar .legacy{display:none!important}
.bar>.group:first-child{flex:none}
.bar>.group:first-child label.btn.primary{display:none}
/* keyboard shortcuts */
.keysbox{position:fixed;inset:0;z-index:80;background:rgba(15,20,30,.38);display:flex;align-items:center;justify-content:center;padding:20px}
.keyspanel{background:var(--surf);color:var(--ink);border-radius:16px;width:min(760px,100%);max-height:90vh;overflow:auto;padding:18px 22px 22px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.keyspanel header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.keyspanel header b{font:600 17px 'Space Grotesk',Inter,sans-serif}
.kcols{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.khead{margin:0 0 6px;font:700 10.5px Inter,sans-serif;letter-spacing:.06em;text-transform:uppercase;color:var(--mut)}
.krow{display:flex;justify-content:space-between;gap:10px;margin:0;padding:5px 0;font-size:13px;border-bottom:1px solid var(--line)}
.krow kbd{font:600 11.5px Inter,sans-serif;background:var(--surf2);border-radius:5px;padding:2px 6px;white-space:nowrap}
.kabout{font-size:13.5px;color:var(--mut);margin:0 0 14px}
@media (max-width:760px){.kcols{grid-template-columns:1fr}.menubar .name{display:none}.menubar .wordmark{display:none!important}}
.mdrop .mtog i{width:30px;height:18px;border-radius:9px;background:var(--line);position:relative;flex:none;transition:.15s}
.mdrop .mtog i::after{content:'';position:absolute;left:2px;top:2px;width:14px;height:14px;border-radius:50%;background:#fff;transition:.15s;box-shadow:0 1px 2px rgba(0,0,0,.3)}
.mdrop .mtog[aria-checked="true"] i{background:var(--acc)}
.mdrop .mtog[aria-checked="true"] i::after{left:14px}
.mdrop .mtog[disabled]{opacity:.45}
.mmb:focus{outline:none}.mmb:focus-visible{box-shadow:0 0 0 2px var(--acc)}

/* ---------- v4.53 tools in a slim strip down the left edge ---------- */
body.loaded .bar{position:fixed;left:0;top:44px;bottom:0;width:56px;min-height:0;z-index:11;flex-direction:column;justify-content:flex-start;align-items:center;gap:6px;padding:8px 0 10px;flex-wrap:nowrap}
body.loaded .main{margin-left:56px}
body.loaded .bar>.group{flex-direction:column;gap:4px;flex:none;margin:0}
body.loaded .bar>.group:last-child{margin-top:auto}
body.loaded .bar .tools{flex-direction:column;flex:none;margin:0;padding:4px;gap:2px;width:46px;align-items:center;overflow:visible}
body.loaded .bar .tools .tool,body.loaded .bar .tools .icon{width:38px;height:38px;min-width:0}
body.loaded .bar .tools .sep{width:24px;height:1px;margin:4px 0}
body.loaded .bar .colorbtn{width:38px;height:38px;padding:0;justify-content:center;gap:0}
body.loaded .bar .colorbtn .thick,body.loaded .bar .colorbtn .chev{display:none}
body.loaded .bar .popwrap{position:relative}
body.loaded .bar .popwrap .pop{top:-8px;left:48px}
body.loaded .bar #notesbtn{width:40px;height:40px;padding:0;justify-content:center}
body.loaded .bar #notesbtn>span,body.loaded .bar #notesbtn .count{display:none}
@media (max-height:720px){body.loaded .bar .tools .tool,body.loaded .bar .tools .icon,body.loaded .bar .colorbtn{width:34px;height:34px}body.loaded .bar .tools{gap:0}body.loaded .bar .tools .sep{margin:2px 0}}
/* flyouts open to the right of the strip */
.flyout.side::before{top:var(--caret,14px)!important;left:-6px!important}

/* ---------- focus mode: whole screen for the PDF ---------- */
body.focus .menubar{display:none}
body.focus.loaded .bar{top:0}
body.focus.outline-open .outline{display:none}
.focusx{position:fixed;top:10px;right:14px;z-index:60;display:none;align-items:center;gap:6px;height:30px;padding:0 12px;border:0;border-radius:15px;background:rgba(20,26,40,.72);color:#fff;font:600 12px Inter,sans-serif;cursor:pointer;opacity:.25;transition:opacity .2s}
.focusx:hover{opacity:1}
body.focus .focusx{display:inline-flex}
.focusx{top:auto;right:auto;bottom:14px;left:50%;transform:translateX(-50%)}

/* ---------- v4.54 roomier notes column ---------- */
.nhead{padding:6px 8px 6px 6px;gap:2px;min-height:44px}
.nhead .ntitle b{font-size:14px}.nhead .ntitle span{font-size:11.5px}
.nstrip{padding:8px 8px 4px;gap:8px;scroll-padding:8px;scrollbar-width:none}
.nstrip::-webkit-scrollbar{display:none}
.npage{flex:0 0 100%;border-radius:10px}
.npage.add:not(.empty){flex-basis:100%}
.ndots{padding:2px 0 8px;min-height:6px}
.ndots .dot{width:6px;height:6px}
.nz-out .pscroll{padding:10px 8px 16px}
/* whole PDF without notes: a slim strip instead of an empty column */
.nslim{display:none}
body .notes .nslim.x{display:flex;flex-direction:column;align-items:center;gap:10px;margin:10px 6px;padding:14px 0;border:1px dashed var(--line);border-radius:12px;background:none;color:var(--mut);cursor:pointer;font:600 12px Inter,sans-serif}
.nslim svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.nslim span{writing-mode:vertical-rl;letter-spacing:.04em}
.nslim:hover{border-color:var(--acc);color:var(--acc);background:var(--accbg)}

/* ---------- note tab on the PDF page edge ---------- */
.nbadge{right:auto;left:100%;top:22px;width:auto;min-height:0;height:auto;padding:7px 7px 7px 6px;margin-left:-1px;border-radius:0 9px 9px 0;flex-direction:column;gap:2px;
  background:var(--surf);color:var(--acc);box-shadow:1px 1px 0 var(--line),0 3px 10px rgba(28,34,48,.12);font:700 12px Inter,sans-serif;transition:background .15s,color .15s,padding .15s}
.nbadge svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.nbadge b{font-size:12px;line-height:1}
.nbadge span{display:none;writing-mode:vertical-rl;font-size:10.5px;font-weight:600;letter-spacing:.03em;margin-top:2px}
.nbadge:hover span,.nbadge.on span{display:block}
.nbadge:hover{background:var(--accbg)}
.nbadge.on{background:var(--acc);color:#fff;box-shadow:0 4px 12px rgba(49,87,244,.35)}
body.dark .nbadge{background:var(--surf2)}
body.dark .nbadge.on{background:var(--acc)}
.nbadge{left:auto;right:0;margin:0;border-radius:9px 0 0 9px;padding:7px 6px 7px 7px;box-shadow:-1px 1px 0 var(--line),0 3px 10px rgba(28,34,48,.14)}

/* v4.55 empty page: lighter, with jumps to pages that have notes */
#ndel[hidden],.nhead .icon[hidden]{display:none}
.npage.add.empty{background:none;border:0;box-shadow:none;justify-content:flex-start;padding-top:12vh}
.addin .addbig{width:64px;height:64px;border-radius:50%;border:1.5px dashed var(--acc);background:var(--accbg);color:var(--acc);font-size:30px;cursor:pointer;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;transition:transform .12s}
.addin .addbig:hover{transform:scale(1.06);border-style:solid}
.addin .big{font:600 16px 'Space Grotesk',Inter,sans-serif}
.addin p{font-size:12.5px;margin-bottom:14px}
.near{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;font-size:12px;color:var(--mut)}
.near button{border:1px solid var(--line);background:var(--surf);color:var(--ink2);font:600 11.5px Inter,sans-serif;border-radius:12px;padding:3px 9px;cursor:pointer}
.near button:hover{border-color:var(--acc);color:var(--acc)}
.npage.add.empty~*,.nstrip:has(.npage.add.empty:only-child)+.ndots{display:none}

/* note tab = a little yellow sticky note poking out of the page edge */
.nbadge{left:auto;right:-13px;top:26px;margin:0;padding:6px 6px 8px;min-width:30px;border-radius:3px 7px 7px 3px;flex-direction:column;align-items:center;gap:1px;
  background:#FFD54A;color:#3b2f00;box-shadow:0 2px 6px rgba(0,0,0,.22);font:700 12px Inter,sans-serif;transform-origin:left center;transition:transform .12s,box-shadow .12s}
.nbadge::after{content:'';position:absolute;right:0;bottom:0;border-style:solid;border-width:0 0 7px 7px;border-color:transparent transparent rgba(0,0,0,.18) transparent;border-radius:0 0 7px 0}
.nbadge svg{width:13px;height:13px;stroke:#3b2f00}
.nbadge span{display:none}
.nbadge:hover{transform:translateX(3px);box-shadow:0 3px 10px rgba(0,0,0,.28)}
.nbadge.on{background:#FFC61A;box-shadow:0 0 0 2px var(--acc),0 3px 10px rgba(0,0,0,.25)}
body.dark .nbadge,body.dark .nbadge.on{background:#FFD54A;color:#3b2f00}
/* pages use content-visibility (clips anything outside them) – so the sticky note sits just inside the edge */
.nbadge{right:8px;top:10px;border-radius:3px 3px 8px 3px}
.nbadge:hover{transform:translateY(-1px) rotate(-2deg)}
.nbadge span,.nbadge:hover span,.nbadge.on span{display:none}

/* ---------- v4.57 notes strip: folds when the page has no notes or the notes are closed ---------- */
.notes{transition:width .18s ease}
body.loaded:not(.notes-open) .notes,body.loaded.notes-open.notes-pageempty .notes{display:flex;width:52px!important;min-width:0}
body.loaded:not(.notes-open) .notes>*:not(.nslim),body.loaded.notes-pageempty .notes>*:not(.nslim){display:none!important}
body.loaded:not(.notes-open) .notes .nslim,body.loaded.notes-pageempty .notes .nslim{display:flex;flex-direction:column;align-items:center;gap:10px;margin:10px 6px;padding:14px 0;border:1px dashed var(--line);border-radius:12px;background:none;color:var(--mut);cursor:pointer;font:600 12px Inter,sans-serif}
body.loaded:not(.notes-open):not(.notes-pageempty) .notes .nslim{border-style:solid;border-color:var(--acc);color:var(--acc);background:var(--accbg)}
@media (max-width:760px){body.loaded:not(.notes-open) .notes{display:none}}

/* ---------- page note tab: the blue tab again, flush with the page's right edge ---------- */
html body .page .nbadge{position:absolute;left:auto;right:0;top:20px;width:30px;height:auto;min-width:0;min-height:0;margin:0;padding:8px 0 7px;border:0;border-radius:9px 0 0 9px;
  background:var(--acc);color:#fff;display:flex;flex-direction:column;align-items:center;gap:3px;transform:none;overflow:visible;
  box-shadow:-2px 2px 8px rgba(49,87,244,.35);font:700 12px Inter,sans-serif;opacity:.88;transition:width .12s,opacity .12s,box-shadow .12s}
html body .page .nbadge[hidden]{display:none}
html body .page .nbadge::after,html body .page .nbadge i,html body .page .nbadge span{display:none}
html body .page .nbadge svg{display:block;width:15px;height:15px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
html body .page .nbadge b{font-size:12px;line-height:1;color:#fff}
html body .page .nbadge:hover{width:34px;opacity:1}
html body .page .nbadge.on{opacity:1;width:34px;box-shadow:-3px 3px 12px rgba(49,87,244,.5)}

/* ---------- movable text bar ---------- */
.tgrip{display:inline-flex;align-items:center;justify-content:center;width:16px;height:30px;margin-right:2px;color:var(--mut);cursor:grab;font-size:14px;user-select:none;touch-action:none}
.tgrip:hover{color:var(--acc)}
#tbar.moved::before{display:none}
#tbar.dragging{cursor:grabbing;opacity:.92}

/* ---------- v4.58 one options bar for every tool (top of the PDF by default, movable) ---------- */
.flyout::before,.flyout.side::before,#tbar.flyout::before{display:none!important}
.flyout{box-shadow:0 0 0 1px var(--line),0 10px 28px rgba(28,34,48,.16)!important}
.ograb{display:inline-flex;align-items:center;justify-content:center;width:16px;align-self:stretch;margin:0 2px 0 -2px;color:var(--mut);cursor:grab;font-size:14px;user-select:none;touch-action:none;flex:none}
.ograb:hover{color:var(--acc)}
.ograb:active{cursor:grabbing}
.tgrip{display:none}

/* v4.59 pin the notes column open */
body.loaded.notes-open.notes-pinned.notes-pageempty .notes{width:var(--nw,440px)!important;min-width:300px}
body.loaded.notes-open.notes-pinned.notes-pageempty .notes>.nhead,body.loaded.notes-open.notes-pinned.notes-pageempty .notes>.nstrip{display:flex!important}
body.loaded.notes-open.notes-pinned.notes-pageempty .notes>.ndots{display:none!important}
body.loaded.notes-open.notes-pinned.notes-pageempty .notes .nslim{display:none!important}
body.loaded.notes-open.notes-pinned.notes-pageempty .notes .resize{display:flex!important}
.nslimpin{display:none}
body.loaded:not(.notes-pinned).notes-pageempty .notes .nslimpin,body.loaded:not(.notes-open) .notes .nslimpin{display:flex!important;margin:0 auto 10px;width:34px;height:34px}
.npin svg{width:17px;height:17px}
.npin[aria-pressed="true"]{color:var(--acc);background:var(--accbg)}
.npin[aria-pressed="true"] svg{fill:var(--acc)}

/* ---------- v4.60 Lectures ---------- */
.lclist{display:flex;flex-direction:column;min-height:0;flex:1;position:relative}
.lclist[hidden]{display:none}
.lchead{padding:4px 12px 8px}
.lcsearch{display:flex;align-items:center;gap:8px;height:38px;padding:0 10px;border:1px solid var(--line);border-radius:10px;background:var(--surf)}
.lcsearch:focus-within{border-color:var(--acc);box-shadow:0 0 0 3px var(--accbg)}
.lcsearch svg{width:16px;height:16px;fill:none;stroke:var(--mut);stroke-width:2;flex:none}
.lcsearch input{flex:1;min-width:0;border:0;outline:0;background:none;color:var(--ink);font:400 13.5px Inter,sans-serif}
.lcres{flex:1;overflow:auto;padding:0 8px 10px}
.lcsec{margin:10px 6px 6px;font:700 10.5px Inter,sans-serif;letter-spacing:.06em;text-transform:uppercase;color:var(--mut)}
.lcsec span{font-weight:600;color:var(--mut2,var(--mut));margin-left:4px}
.lcrow{display:flex;gap:10px;padding:8px 6px;border-radius:10px}
.lcrow:hover{background:var(--hov)}
.lcth{position:relative;flex:none;width:108px;height:61px;border:0;padding:0;border-radius:7px;overflow:hidden;background:var(--surf2);cursor:pointer}
.lcth img{width:100%;height:100%;object-fit:cover;display:block}
.lcdur{position:absolute;right:4px;bottom:4px;background:rgba(0,0,0,.78);color:#fff;font:600 10px Inter,sans-serif;padding:1px 4px;border-radius:3px}
.lcph{display:flex;width:100%;height:100%;align-items:center;justify-content:center}
.lcph svg{width:24px;height:24px;fill:#fff}
.lcph.dr{background:linear-gradient(135deg,#1fa463,#4285f4)}.lcph.vm{background:#1ab7ea}.lcph.fl{background:#7a5af8}.lcph.ln{background:#8a93a6}.lcph.yt{background:#e62117}
.lcinfo{flex:1;min-width:0}
.lctitle{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;border:0;background:none;padding:0;text-align:left;color:var(--ink);font:600 12.5px/1.35 Inter,sans-serif;cursor:pointer}
.lctitle:hover{color:var(--acc)}
.lcmeta{display:flex;flex-wrap:wrap;align-items:center;gap:4px;margin:4px 0 0;font-size:11px;color:var(--mut)}
.lcch{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:120px}
.lctag{font:700 9.5px Inter,sans-serif;letter-spacing:.02em;padding:2px 6px;border-radius:5px;white-space:nowrap}
.lctag.yt{background:#fde7e6;color:#c4170f}.lctag.dr{background:#e3f4ea;color:#137a43}.lctag.vm{background:#e2f6fd;color:#0b7fa6}.lctag.fl{background:#efeafe;color:#5b3fd6}.lctag.ln{background:var(--surf2);color:var(--ink2)}.lctag.sv{background:#fff4d6;color:#8a6200}
body.dark .lctag.yt{background:rgba(230,33,23,.2);color:#ff8a83}body.dark .lctag.dr{background:rgba(31,164,99,.2);color:#7fdca7}body.dark .lctag.vm{background:rgba(26,183,234,.18);color:#7fd6f5}body.dark .lctag.sv{background:rgba(255,196,0,.16);color:#ffd36b}
.lcdesc{margin:3px 0 0;font-size:11.5px;color:var(--mut);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lctags{display:flex;flex-wrap:wrap;gap:4px;margin:3px 0 0;font-size:10.5px;color:var(--acc)}
.lcacts{display:flex;gap:4px;margin-top:5px;opacity:0;transition:opacity .12s}
.lcrow:hover .lcacts,.lcrow:focus-within .lcacts{opacity:1}
.lcacts button{border:1px solid var(--line);background:var(--surf);color:var(--ink2);font:600 11px Inter,sans-serif;border-radius:7px;padding:3px 8px;cursor:pointer}
.lcacts button:hover{border-color:var(--acc);color:var(--acc)}
.lcload,.lcnone{display:flex;align-items:center;gap:8px;margin:6px;font-size:12.5px;color:var(--mut)}
.lcnokey{margin:6px;padding:12px;border:1px dashed var(--line);border-radius:10px;font-size:12.5px;color:var(--mut)}
.lcnokey p{margin:0 0 8px}
.lcempty{margin:30px 14px;text-align:center;color:var(--mut);font-size:12.5px}
.lcempty b{display:block;color:var(--ink);font-size:14px;margin-bottom:6px}
.lcfoot{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px 10px;border-top:1px solid var(--line)}
.lcset{border:0;background:none;color:var(--mut);font:500 11.5px Inter,sans-serif;cursor:pointer;text-decoration:underline}
.lcsheet{position:absolute;inset:0;background:var(--bar,var(--surf));z-index:3;overflow:auto;padding:10px 14px}
.lcform{display:flex;flex-direction:column;gap:10px;font-size:12.5px}
.lcform>b{font:600 15px 'Space Grotesk',Inter,sans-serif}
.lcform label{display:flex;flex-direction:column;gap:4px;font-weight:600;color:var(--ink2)}
.lcform label i{font-weight:400;color:var(--mut);font-style:normal}
.lcform input,.lcform textarea{font:400 13px Inter,sans-serif;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--surf);color:var(--ink);resize:vertical}
.lcform input:focus,.lcform textarea:focus{outline:0;border-color:var(--acc)}
.lcsrcnote{margin:0;color:var(--mut);font-size:11.5px;line-height:1.5}
.lcerr{margin:0;color:#c62828;font-size:12px}
.lcbtns{display:flex;justify-content:flex-end;gap:8px}
.lchelp{margin:0;color:var(--mut);line-height:1.5}
ol.lchelp{padding-left:18px}
.lchelp a{color:var(--acc)}
/* docked player */
.lplayer{position:fixed;right:24px;bottom:24px;width:420px;min-width:260px;max-width:90vw;z-index:45;background:#0f1218;border-radius:12px;overflow:hidden;box-shadow:0 18px 50px rgba(0,0,0,.35);resize:horizontal;display:flex;flex-direction:column}
.lplayer[hidden]{display:none}
.lplayer.drag{opacity:.9}
.lphead{display:flex;align-items:center;gap:6px;height:36px;padding:0 6px 0 10px;background:#1a1f29;color:#e8ebf2;cursor:grab;user-select:none}
.lphead b{flex:1;min-width:0;font:600 12px Inter,sans-serif;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lpbtn{border:0;background:rgba(255,255,255,.08);color:#e8ebf2;font:600 11.5px Inter,sans-serif;height:26px;padding:0 9px;border-radius:7px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center}
.lpbtn.ic{width:26px;padding:0;justify-content:center}
.lpbtn:hover{background:rgba(255,255,255,.18)}
#lpnote{background:var(--acc)}
.lpbody{aspect-ratio:16/9;width:100%;background:#000}
.lpbody iframe,.lpbody video,.lpbody #lpyt{width:100%;height:100%;border:0;display:block}

/* v4.61 Lectures easier to find + tidier rows */
.mmb.mlink{gap:6px;color:var(--acc);font-weight:600}
.mmb.mlink .ei{margin:0;width:17px;height:17px}
.mmb.mlink:hover{background:var(--accbg);color:var(--acc)}
.lchtitle{margin:2px 2px 8px;font:600 15px 'Space Grotesk',Inter,sans-serif;color:var(--ink)}
.lchtitle span{font:400 11.5px Inter,sans-serif;color:var(--mut);margin-left:6px}
.lcsearch{padding:0 4px 0 10px}
.lcgo{flex:none;height:30px;padding:0 12px;border:0;border-radius:7px;background:var(--acc);color:#fff;font:600 12px Inter,sans-serif;cursor:pointer}
.lcgo:hover{filter:brightness(1.08)}
.lcacts{opacity:1;flex-wrap:nowrap;gap:4px;margin-top:6px}
.lcacts button{white-space:nowrap;padding:3px 7px;font-size:11px;line-height:1.3}
.lcacts button.pri{background:var(--accbg);border-color:transparent;color:var(--acc)}
.lcacts button.ic{width:26px;padding:3px 0;text-align:center}
.lcacts button.warn{width:auto;padding:3px 7px;border-color:#e57373;color:#c62828}
.lcrow{border:1px solid transparent}
.lcrow:hover{border-color:var(--line)}
.lcth{width:96px;height:54px}
/* v4.62 side tabs as words: Chapters · Pages · Revise · Find · Lectures */
.ohead{padding-left:10px;padding-right:6px;gap:4px}
.otabs button{padding:5px 4px;font-size:11.5px;min-width:0;white-space:nowrap}
.otabs .otab-s{padding:5px 4px}
#oclose{flex:none;width:26px;height:26px}
/* v4.63 calmer side panel: 3 tabs; Find and Lectures open as their own panel with a back arrow */
.otabs [data-tab="lc"],.otabs [data-tab="sr"]{display:none}
.otabs button{padding:5px 10px;font-size:12px}
.otabs[hidden]{display:none}
.otool{flex:1;display:flex;align-items:center;gap:6px;min-width:0}
.otool[hidden]{display:none}
.otool b{font:600 15px 'Space Grotesk',Inter,sans-serif;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#oback svg{width:16px;height:16px}
.otool b{text-transform:none;letter-spacing:0}
/* v4.64 restore chooser */
.rbk{display:flex;flex-direction:column;gap:6px;min-width:min(520px,80vw)}
.rbkhint{margin:0 0 6px;font-size:12.5px;color:var(--mut)}
.rbksec{margin:10px 0 2px;font:700 10.5px Inter,sans-serif;letter-spacing:.06em;text-transform:uppercase;color:var(--mut)}
.rbksec span{margin-left:4px;font-weight:600}
.rbkrow{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px;border:1px solid var(--line);border-radius:10px}
.rbkrow.this{border-color:var(--acc);background:var(--accbg)}
.rbkrow div{display:flex;flex-direction:column;min-width:0}
.rbkrow b{font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rbkrow span{font-size:11.5px;color:var(--mut)}
.rbknone{margin:0;padding:10px 12px;border:1px dashed var(--line);border-radius:10px;font-size:12.5px;color:var(--mut)}
#mbody:has(.rbk){background:var(--surf);color:var(--ink);padding:16px 20px;display:block;overflow:auto;max-height:65vh}
.rbk{min-width:min(560px,80vw)}

/* v4.68 lecture player: resize from any edge or corner; video fills */
.lplayer{resize:none;height:auto;min-height:170px}
.lplayer[style*="height"] .lpbody{aspect-ratio:auto;flex:1;min-height:0}
.lprz{position:absolute;z-index:2}
.lprz.n,.lprz.s{left:10px;right:10px;height:8px;cursor:ns-resize}.lprz.n{top:-3px}.lprz.s{bottom:-3px}
.lprz.e,.lprz.w{top:10px;bottom:10px;width:8px;cursor:ew-resize}.lprz.e{right:-3px}.lprz.w{left:-3px}
.lprz.ne,.lprz.nw,.lprz.se,.lprz.sw{width:16px;height:16px}
.lprz.ne{top:-3px;right:-3px;cursor:nesw-resize}.lprz.sw{bottom:-3px;left:-3px;cursor:nesw-resize}
.lprz.nw{top:-3px;left:-3px;cursor:nwse-resize}.lprz.se{bottom:-3px;right:-3px;cursor:nwse-resize}
.lprz.se::after{content:'';position:absolute;right:6px;bottom:6px;width:8px;height:8px;border-right:2px solid rgba(255,255,255,.5);border-bottom:2px solid rgba(255,255,255,.5)}
.lplayer.drag iframe{pointer-events:none}

/* v4.68 focus view */
.page.fhide{display:none!important}
.fbar{position:fixed;left:50%;top:52px;transform:translateX(-50%);z-index:30;display:flex;align-items:center;gap:6px;padding:6px 6px 6px 14px;background:var(--surf);color:var(--ink);border-radius:22px;box-shadow:0 0 0 1px var(--line),0 8px 24px rgba(28,34,48,.16);font-size:12.5px}
.fbar b{font:600 13px 'Space Grotesk',Inter,sans-serif;color:var(--acc)}
.fbar .fcnt{color:var(--mut);margin-right:6px}
.fbar button{border:0;background:var(--surf2);color:var(--ink2);font:600 12px Inter,sans-serif;height:28px;padding:0 11px;border-radius:14px;cursor:pointer}
.fbar button.on{background:var(--acc);color:#fff}
.fbar button.fx{background:none;color:var(--mut)}
.fbar button.fx:hover{color:var(--ink)}
body.focus .fbar{top:10px}
.fvbtn{display:block;width:100%;margin-top:8px;border:1px dashed var(--acc);background:var(--accbg);color:var(--acc);font:600 12.5px Inter,sans-serif;height:36px;border-radius:10px;cursor:pointer}
.fvbtn:hover{border-style:solid}
/* v4.68 chapter progress */
.oitem>span{display:flex;flex-direction:column;gap:3px;min-width:0}
.oprog{display:block;height:4px;border-radius:2px;background:var(--line);overflow:hidden;width:100%;max-width:180px}
.oprog i{display:block;height:100%;background:var(--acc);border-radius:2px}
.opct{font:600 10.5px Inter,sans-serif;font-style:normal;color:var(--mut)}
.opct.full{color:#2e7d32}
.opct b{color:#f57c00;font-weight:700}
.oprog{background:linear-gradient(90deg,var(--acc) var(--p),var(--line) var(--p))!important;min-width:60px}
.oitem .oprog{height:4px!important;min-height:4px;flex:none}
/* v4.69 focus view: bar over the PDF, exit always visible; button inside the Revise footer */
.fbar{z-index:46;flex-wrap:wrap;justify-content:center;row-gap:4px}
.fbar button.fx{background:var(--surf2);color:var(--ink)}
.fbar button.fx:hover{background:#fde7e6;color:#c62828}
.rfoot{flex-wrap:wrap}
.rfoot .fvbtn{flex:1 0 100%;margin-top:0;height:34px;font-size:12px}
.fvbtn.on{border-style:solid;background:var(--acc);color:#fff}
.fbar button.fexit{display:inline-flex!important;align-items:center;background:var(--surf2);color:var(--ink)}
.fbar button.fexit:hover{background:#fde7e6;color:#c62828}
/* v4.70 focus bar: counts on each choice, round ✕ */
.fbar button span{font-weight:500;opacity:.7;margin-left:2px}
.fbar button:disabled{opacity:.4;cursor:default}
.fbar button.fexit{width:28px;padding:0;justify-content:center;border-radius:50%;font-size:13px}
.fbar .fcnt{display:none}
/* v4.71 lecture row buttons never squeeze; delete asks in place */
.lcacts button{flex:none}
.lcacts.ask{align-items:center;gap:6px}
.lcacts.ask span{font-size:11.5px;color:var(--ink2);font-weight:600;margin-right:2px}
.lcacts button.danger{background:#c62828;border-color:#c62828;color:#fff}
.lcacts button.danger:hover{background:#b71c1c;color:#fff}
.lcacts.ask span{white-space:nowrap}
/* v4.72 delete question on its own line, buttons under it with room to spare */
.lcacts.ask{flex-wrap:wrap;row-gap:5px}
.lcacts.ask span{flex:1 0 100%}
/* v4.73 lecture rows never wider than the panel */
.lcres{overflow-x:hidden}
.lcrow{min-width:0}
.lcinfo{min-width:0;overflow:hidden}
.lcacts{flex-wrap:wrap;row-gap:4px}
.lctitle{word-break:break-word}
.lcth{width:84px;height:47px}.lcrow{gap:9px;padding:8px 4px}.lcacts button{padding:3px 6px}
.lcacts button.ic{width:28px;padding:3px 0;text-align:center}.lcacts{flex-wrap:nowrap}.lcacts.ask{flex-wrap:wrap}
/* v4.75 Revise footer: list fades out above it, soft divider */
.rfoot{position:sticky;bottom:0;z-index:2;background:var(--bar)!important;border-top:1px solid var(--line);box-shadow:0 -10px 18px -12px rgba(28,34,48,.18);padding-top:12px}
.rfoot::before{content:'';position:absolute;left:0;right:0;top:-29px;height:28px;pointer-events:none;background:linear-gradient(180deg,transparent,var(--bar))}
body.dark .rfoot{box-shadow:0 -10px 18px -12px rgba(0,0,0,.6)}

/* ---------- v4.76 lasso ---------- */
svg.lasso{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:6;overflow:visible}
svg.lasso path{fill:rgba(49,87,244,.08);stroke:#3157F4;stroke-width:1.5;stroke-dasharray:5 4}
.lsframe{position:absolute;z-index:7;border:1.5px dashed #3157F4;border-radius:4px;pointer-events:none}
.lsframe .lsh{position:absolute;right:-7px;bottom:-7px;width:13px;height:13px;border-radius:50%;background:#fff;border:2px solid #3157F4;cursor:nwse-resize;pointer-events:auto;box-shadow:0 1px 3px rgba(0,0,0,.25)}
.lsbar{position:absolute;left:50%;bottom:calc(100% + 8px);transform:translateX(-50%);display:flex;align-items:center;gap:4px;padding:5px 6px;background:var(--surf);border-radius:20px;box-shadow:0 0 0 1px var(--line),0 6px 18px rgba(28,34,48,.18);pointer-events:auto;white-space:nowrap}
.lsbar [data-lc]{width:18px;height:18px;border-radius:50%;border:2px solid var(--surf);box-shadow:0 0 0 1px var(--line);background:var(--c);cursor:pointer;padding:0}
.lsbar [data-lc]:hover{transform:scale(1.15)}
.lsbar i{width:1px;height:16px;background:var(--line);margin:0 2px}
.lsbar .lsdel{border:0;background:none;cursor:pointer;font-size:14px;padding:0 4px}
.lsbar span{font:600 11px Inter,sans-serif;color:var(--mut);padding:0 4px 0 2px}
/* v4.77 note tab: same blue tab in night mode */
body.dark .page .nbadge{background:var(--acc);color:#fff;border:0}
body.dark .page .nbadge.on{box-shadow:-3px 3px 12px rgba(0,0,0,.5)}
/* v4.79 clip: rectangle / free shape */
.clipm .cshape{display:inline-flex;gap:2px;padding:2px;background:var(--surf2);border-radius:8px;margin-right:6px}
.clipm .cshape button{width:30px;height:28px;padding:0;display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:6px;background:none;color:var(--mut);cursor:pointer}
.clipm .cshape button .ei{margin:0;width:17px;height:17px}
.clipm .cshape button.on{background:var(--surf);color:var(--acc);box-shadow:0 1px 2px rgba(0,0,0,.12)}
svg.lasso.clip path{fill:rgba(255,213,74,.12);stroke:#f57c00}
/* v4.80 revision PDF chooser */
.fastopt .btn b em{font-style:normal;font-weight:700;font-size:11px;background:var(--acc,#3157f4);color:#fff;border-radius:9px;padding:0 6px;margin-left:4px}
.fastopt .btn[disabled]{opacity:.45;cursor:default}
.revnc{display:flex;align-items:center;gap:7px;font-size:12.5px;margin:10px 2px 0;cursor:pointer}
.revnc input{accent-color:var(--acc,#3157f4)}
.revbox .fastopt{flex-direction:column}.revbox .fastopt .btn{flex-direction:row;align-items:center;justify-content:space-between;padding:9px 12px}
/* v4.81 stamps & tape on note pages */
svg.nink path.tape{stroke-opacity:1;filter:drop-shadow(0 1px 1px rgba(0,0,0,.18));transition:stroke-opacity .15s}
svg.nink path.tape.open{stroke-opacity:.16;filter:none}
svg.nink g.stamp{filter:drop-shadow(0 1px 1.5px rgba(0,0,0,.25))}
svg.nink path.nlasso{fill:rgba(49,87,244,.08);stroke:#3157F4;stroke-width:1.5;stroke-dasharray:5 4;vector-effect:non-scaling-stroke}
svg.nink .msel,svg.nink path.tape.msel,svg.nink g.stamp.msel{filter:drop-shadow(0 0 1.5px #3157F4) drop-shadow(0 0 3px rgba(49,87,244,.7))!important}
/* v4.87 PDF tabs */
.wtabs{display:none;align-items:flex-end;gap:2px;height:32px;padding:0 10px 0 64px;background:var(--bar);border-bottom:1px solid var(--line);overflow-x:auto;overflow-y:hidden;scrollbar-width:none;flex:none;position:relative;z-index:11}
.wtabs::-webkit-scrollbar{display:none}
body.loaded.hastabs .wtabs{display:flex}
body.loaded.hastabs .bar{top:76px}
body.focus .wtabs{display:none!important}
body.focus.loaded.hastabs .bar{top:0}
.wtab{display:flex;align-items:center;gap:6px;height:27px;padding:0 6px 0 12px;max-width:220px;min-width:90px;flex:0 1 auto;border-radius:8px 8px 0 0;color:var(--mut);font-size:12.5px;cursor:pointer;user-select:none;border:1px solid transparent;border-bottom:0;white-space:nowrap}
.wtab:hover{background:rgba(127,127,127,.08);color:var(--ink)}
.wtab.on{background:var(--bg);color:var(--ink);font-weight:600;border-color:var(--line);margin-bottom:-1px;height:28px}
.wtn{overflow:hidden;text-overflow:ellipsis;min-width:0;flex:1}
.wtab .ftag{flex:none}
.wtx{flex:none;width:20px;height:20px;border:0;background:none;border-radius:5px;display:grid;place-items:center;color:inherit;opacity:.55;cursor:pointer;padding:0}
.wtx:hover{opacity:1;background:rgba(127,127,127,.18)}
.wtx svg,.wtadd svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round}
.wtab:not(.on):not(:hover) .wtx{opacity:0}
.wtadd{flex:none;align-self:center;width:26px;height:26px;border:0;background:none;border-radius:7px;color:var(--mut);display:grid;place-items:center;cursor:pointer;margin-left:2px}
.wtadd:hover{background:rgba(127,127,127,.12);color:var(--ink)}
.wtdue{flex:none;width:7px;height:7px;border-radius:50%;background:#f57c00;margin-right:-1px}
a.mi2{text-decoration:none;color:inherit}
/* v4.91 Notebook mode */
.nmode{display:flex;flex:none;background:rgba(127,127,127,.12);border-radius:8px;padding:2px;gap:2px;margin-left:4px}
.nmode button{border:0;background:none;font:600 11.5px Inter,sans-serif;color:var(--mut);padding:4px 8px;border-radius:6px;cursor:pointer;white-space:nowrap}
.nmode button.on{background:var(--bar,#fff);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.12)}
.pgchip{position:absolute;left:0;top:-15px;height:14px;padding:0 5px;border:0;border-radius:4px;background:#e8efff;color:#3157f4;font:700 9.5px/14px Inter,sans-serif;cursor:pointer;z-index:2;opacity:.85}
.pgchip:hover{opacity:1;background:#3157f4;color:#fff}
body.dark .pgchip{background:rgba(49,87,244,.25);color:#9db4ff}
.ntitle{min-width:0}.ntitle #nsub,.ntitle #ntitle{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.inkchips{position:absolute;inset:0;pointer-events:none;z-index:3}
.inkchips .pgchip{top:auto;pointer-events:auto}
body.notebook #ntitle{display:none}body.notebook #nsub{font-weight:600;color:var(--ink)}.ntitle{flex:1 1 auto;min-width:52px}
.nchips{display:none}
body.notebook .nchips{display:grid}
.nchips[aria-pressed="true"]{color:var(--acc)}
body.nochips .npage .pgchip{display:none}
.nchips{border:1px solid var(--line);background:none;border-radius:8px;height:28px;padding:0 7px 0 5px;align-items:center;gap:4px;cursor:pointer;color:var(--mut);font:600 11px Inter,sans-serif;flex:none}
body.notebook .nchips{display:flex}
.nchips .chipico{height:16px;padding:0 5px;border-radius:4px;font:700 9.5px/16px Inter,sans-serif;background:#e8efff;color:#3157f4}
.nchips[aria-pressed="false"] .chipico{background:rgba(127,127,127,.15);color:var(--mut);text-decoration:line-through}
.nchips[aria-pressed="true"]{color:var(--ink)}
.nchips:hover{background:rgba(127,127,127,.08)}
.nchips{padding:0 5px}
/* v4.95 eraser options */
.erasem.flyout{display:none}
body.t-erase .erasem.flyout{display:flex}
.erasem .esz{display:flex;gap:2px;margin-left:6px;padding-left:8px;border-left:1px solid var(--line)}
.erasem .esz button{width:30px;padding:0;display:grid;place-items:center}
.erasem .esz i{display:block;border-radius:50%;background:currentColor}
.erasem.whole .esz{opacity:.35;pointer-events:none}
/* v4.96 Organize pages */
.orgwrap{position:fixed;inset:0;z-index:300;background:rgba(20,24,34,.45);display:flex;align-items:center;justify-content:center;padding:24px}
.orgbox{width:min(1180px,100%);height:min(860px,100%);background:var(--surf,#fff);border-radius:16px;display:flex;flex-direction:column;box-shadow:0 20px 60px rgba(0,0,0,.3);overflow:hidden}
.orghead{display:flex;align-items:center;gap:12px;padding:14px 16px 12px 20px;border-bottom:1px solid var(--line)}
.orghead b{font:600 17px Inter,sans-serif}
.orgsub{color:var(--mut);font-size:13px}
.orgsel{margin-left:auto}
.orgx svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.orggrid{flex:1;overflow:auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px;padding:18px 20px;align-content:start;background:var(--bg)}
.orgc{background:var(--surf,#fff);border-radius:12px;padding:10px 10px 6px;box-shadow:0 0 0 1px var(--line);cursor:grab;user-select:none;position:relative;transition:box-shadow .12s,opacity .12s}
.orgc:hover{box-shadow:0 0 0 1px var(--acc),0 4px 14px rgba(28,34,48,.12)}
.orgc.drag{opacity:.35}
.orgc.over::before{content:'';position:absolute;left:-10px;top:8px;bottom:8px;width:4px;border-radius:2px;background:var(--acc)}
.orgc.over.after::before{left:auto;right:-10px}
.orgt{height:170px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.orgimg{display:block;transition:transform .2s;box-shadow:0 1px 4px rgba(0,0,0,.18);background:#fff;min-width:60px;min-height:80px}
.orgimg canvas{display:block;max-width:130px;max-height:150px}
.orgc.del .orgimg{opacity:.3}
.orgdel{position:absolute;inset:auto 0 50% 0;text-align:center;font:700 12px Inter,sans-serif;color:#c62828}
.orgb{display:flex;align-items:center;gap:2px;margin-top:6px}
.orgn{font:600 12.5px Inter,sans-serif;margin-right:auto;padding-left:2px}
.orgn s{color:var(--mut);font-weight:400}
.orgb button{width:28px;height:28px;border:0;background:none;border-radius:7px;display:grid;place-items:center;color:var(--mut);cursor:pointer}
.orgb button:hover{background:var(--hov,rgba(127,127,127,.12));color:var(--ink)}
.orgb button.on{color:#c62828;background:rgba(198,40,40,.1)}
.orgb svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.orgfoot{display:flex;align-items:center;gap:8px;padding:12px 16px 12px 20px;border-top:1px solid var(--line);min-height:62px}
.orgfoot #orginfo{color:var(--mut);font-size:13px}
.orgsp{flex:1}
.orgopt{flex:1;margin:0!important}
.orgprog{flex:1;display:flex;flex-direction:column;gap:7px;padding:2px 4px}
.orgprow{display:flex;justify-content:space-between;font-size:13px}
.orgprow b{font-weight:600}
.orgprow span{color:var(--mut);font-variant-numeric:tabular-nums}
.orgprog .fastbar{margin:0}
.orgprog .fastbar i{transition:width .25s ease}
/* v4.99 how small */
.fastlvl{display:flex;gap:6px;margin:2px 0 8px}
.fastlvl .btn{flex:1;height:auto;padding:8px 10px;display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;border-radius:10px}
.fastlvl .btn b{font-size:12.5px}.fastlvl .btn span{font-size:11px;color:var(--mut);font-weight:400;line-height:1.3}
.fastlvl .btn.pick{border-color:var(--acc);background:var(--accbg);box-shadow:inset 0 0 0 1px var(--acc)}
.fastlvl .btn{flex:1 1 0;min-width:0;white-space:normal}
.fastlvl .btn span{overflow-wrap:anywhere}
.fastok{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#2e7d32;color:#fff;font-size:12px;margin-right:8px;vertical-align:-3px}
.fastbox:has(.fastlvl){width:min(540px,calc(100vw - 32px))}
/* v4.101 split */
.splitbox{width:min(560px,100%);height:auto}
.splitin{padding:18px 20px 6px;display:flex;flex-direction:column;gap:8px}
.splitin label{font:600 13px Inter,sans-serif}.splitin label span{color:var(--mut);font-weight:400}
.splitin input{height:40px;border:1px solid var(--line);border-radius:10px;padding:0 12px;font:15px Inter,sans-serif;background:var(--bg);color:var(--ink)}
.splitin input:focus{outline:2px solid var(--acc);outline-offset:-1px}
.sphelp,.spnote{margin:0;font-size:12.5px;color:var(--mut)}
.sperr{margin:0;font-size:12.5px;color:#c62828}
.spmode{margin:6px 0 4px!important}
.orgx{margin-left:auto}.orgsel+.orgx{margin-left:0}
/* v4.102 merge */
.mglist{list-style:none;margin:4px 0;padding:0;display:flex;flex-direction:column;gap:6px;max-height:46vh;overflow:auto}
.mgrow{display:flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:10px;padding:7px 8px 7px 10px;background:var(--bg)}
.mgn{width:22px;height:22px;border-radius:50%;background:var(--accbg);color:var(--acc);font:700 11.5px/22px Inter,sans-serif;text-align:center;flex:none}
.mgname{flex:1;min-width:0;display:flex;flex-direction:column}
.mgname b{font:600 13px Inter,sans-serif;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mgname small{color:var(--mut);font-size:11.5px}
.mgrow button{width:28px;height:28px;border:0;border-radius:7px;background:none;color:var(--mut);cursor:pointer;font-size:14px}
.mgrow button:hover:not(:disabled){background:var(--hov);color:var(--ink)}
.mgrow button:disabled{opacity:.3;cursor:default}
.mgadd{align-self:flex-start;display:inline-flex;align-items:center;gap:6px;cursor:pointer}
.mgadd svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round}
/* v4.103 Ribbon (Word-style) */
.menubar .mms{display:none}
.rtabs{display:flex;align-items:center;gap:2px;margin-left:6px}
.rtab{height:32px;padding:0 13px;border:0;background:none;border-radius:8px;font:500 13.5px Inter,sans-serif;color:var(--ink2,var(--ink));cursor:pointer;position:relative;white-space:nowrap}
.rtab:hover{background:var(--hov)}
.rtab.on{color:var(--acc);background:var(--accbg)}
.rtab.on::after{content:'';position:absolute;left:12px;right:12px;bottom:-6px;height:3px;border-radius:2px;background:var(--acc)}
body.ribmin .rtab.on::after{display:none}
.rcount{display:inline-block;min-width:17px;height:17px;padding:0 5px;margin-left:5px;border-radius:9px;background:#f57c00;color:#fff;font:700 10.5px/17px Inter,sans-serif;text-align:center;vertical-align:1px}
.rcount:empty{display:none}
.rmin{width:28px;height:28px;border:0;background:none;border-radius:7px;display:grid;place-items:center;color:var(--mut);cursor:pointer;margin-left:2px}
.rmin:hover{background:var(--hov);color:var(--ink)}
.rmin svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.ribbon{flex:none;background:var(--bar);border-top:1px solid var(--line);border-bottom:1px solid var(--line);position:relative;z-index:12;overflow-x:auto;overflow-y:hidden;scrollbar-width:thin}
.rpanel{display:flex;align-items:stretch;padding:5px 10px 0;min-height:82px}
.rpanel[hidden]{display:none}
.rgrp{display:flex;flex-direction:column;align-items:center;padding:0 8px;border-right:1px solid var(--line)}
.rgrp:last-child{border-right:0}
.rbtns{display:flex;align-items:flex-start;gap:2px;flex:1}
.rbtn{display:flex;flex-direction:column;align-items:center;gap:4px;width:70px;min-height:58px;padding:6px 3px 4px;border:0;background:none;border-radius:8px;cursor:pointer;color:var(--ink);font:500 11.5px/1.2 Inter,sans-serif;text-align:center}
.rbtn svg{width:24px;height:24px;flex:none;fill:none;stroke:var(--acc);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.rbtn:hover{background:var(--hov)}
.rbtn:active{transform:scale(.97)}
.rbtn.on{background:var(--accbg)}
.rbtn:disabled{opacity:.4;cursor:default}
.rbtn[hidden]{display:none}
.rcol{display:flex;flex-direction:column;gap:1px;justify-content:center;align-self:center}
.rbtn.rs{flex-direction:row;width:auto;min-height:0;gap:7px;padding:4px 9px 4px 6px;font-weight:500;font-size:12px;text-align:left;white-space:nowrap}
.rbtn.rs svg{width:17px;height:17px}
.rgl{font:500 10.5px Inter,sans-serif;color:var(--mut2,var(--mut));padding:2px 0 5px;white-space:nowrap}
body:not(.loaded) #ribbon .mdoc,body:not(.loaded) #rtabs .mdoc{display:none}
body.ribmin .ribbon{display:none}
body.ribmin .ribbon.pop{display:block;position:absolute;left:0;right:0;top:44px;z-index:70;box-shadow:0 12px 28px rgba(28,34,48,.18);animation:flyin .15s ease-out}
body.focus .ribbon,body.focus .rtabs{display:none!important}
body.loaded .bar,body.loaded.hastabs .bar{top:var(--toph,44px)}
body.focus.loaded .bar,body.focus.loaded.hastabs .bar{top:0}
.rpanel{height:94px;min-height:0}
body:not(.t-erase) .erasem.flyout{display:none!important}
/* v4.104 compact top: PDF tabs in the menu bar, slim ribbon, zoom pill, hide while reading */
.menubar{gap:10px}
.menubar .wtabs{display:none;flex:1;min-width:0;height:44px;padding:0 0 0 4px;background:none;border:0;align-items:flex-end;align-self:stretch}
body.loaded.hastabs .menubar .wtabs{display:flex}
body.loaded.hastabs .menubar .name{display:none}
.menubar .wtab{height:32px;margin-bottom:0;border-radius:9px 9px 0 0}
.menubar .wtab.on{height:34px;background:var(--bg);border-color:var(--line);margin-bottom:-1px}
body.loaded.hastabs .bar{top:var(--toph,44px)}
.ribbon{border-top:1px solid var(--line);overflow:visible}
.ribrow{display:flex;align-items:center;gap:6px;padding:0 10px;min-height:38px;flex-wrap:wrap}
.rtabs{margin-left:0}
.rtab{height:30px;padding:0 11px;font-size:13px}
.rtab.on::after{bottom:-4px}
.rmode{margin-left:auto;position:relative;flex:none}
.rmodeb{width:30px;height:28px;border:0;background:none;border-radius:7px;display:grid;place-items:center;color:var(--mut);cursor:pointer}
.rmodeb:hover{background:var(--hov);color:var(--ink)}
.rmodeb svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.rmodem{position:absolute;right:0;top:32px;z-index:80;width:240px;background:var(--surf);border-radius:12px;box-shadow:0 0 0 1px var(--line),0 12px 30px rgba(28,34,48,.18);padding:6px;display:flex;flex-direction:column;gap:2px}
.rmodem[hidden]{display:none}
.rmodem button{display:flex;flex-direction:column;align-items:flex-start;gap:1px;border:0;background:none;border-radius:8px;padding:7px 10px;text-align:left;cursor:pointer;color:var(--ink)}
.rmodem button:hover{background:var(--hov)}
.rmodem button.on{background:var(--accbg)}
.rmodem b{font:600 12.5px Inter,sans-serif}.rmodem span{font-size:11.5px;color:var(--mut)}
/* full: big buttons on their own line */
body.ribfull .rpanels{order:3;flex-basis:100%;margin:0 -10px;border-top:1px solid var(--line)}
/* slim: the tab's buttons on the same line, small */
body.ribslim .rpanels{flex:1;min-width:0;overflow-x:auto;scrollbar-width:none;display:flex;align-items:center;border-left:1px solid var(--line);padding-left:6px}
body.ribslim .rpanels::-webkit-scrollbar{display:none}
body.ribslim .rpanel{height:auto;min-height:0;padding:0;align-items:center}
body.ribslim .rgrp{flex-direction:row;padding:0 4px;border-right:1px solid var(--line);align-self:center;height:24px;align-items:center}
body.ribslim .rgl{display:none}
body.ribslim .rbtns,body.ribslim .rcol{flex-direction:row;align-items:center;gap:1px}
body.ribslim .rbtn{flex-direction:row;width:auto;min-height:0;gap:6px;padding:4px 8px 4px 6px;font-size:12px;white-space:nowrap;text-align:left}
body.ribslim .rbtn svg{width:16px;height:16px}
body.ribslim .rbtn span br{display:none}
/* folded: only tab names; a tab opens its buttons below, over the page */
body.ribmin .ribbon{display:block}
body.ribmin .rpanels{display:none}
body.ribmin .ribbon.rpop .rpanels{display:block;position:absolute;left:0;right:0;top:100%;z-index:70;background:var(--bar);border-bottom:1px solid var(--line);box-shadow:0 12px 28px rgba(28,34,48,.18);animation:flyin .15s ease-out}
body.ribmin .ribbon.pop{box-shadow:none}
/* zoom + page pill */
.zpill{position:fixed;z-index:30;transform:translateX(-50%);display:none;align-items:center;gap:3px;padding:4px 8px;border-radius:20px;background:var(--surf);box-shadow:0 0 0 1px var(--line),0 6px 18px rgba(28,34,48,.16);opacity:.92;transition:opacity .15s}
body.loaded .zpill{display:flex}
.zpill:hover{opacity:1}
.zpill .icon{width:28px;height:28px;border-radius:50%}
.zpill .zoomlbl{min-width:52px}
.zpill .sep{width:1px;height:18px;background:var(--line);margin:0 4px}
.zpill #pagenum{width:46px;height:28px;text-align:center;border-radius:14px}
.zpill .of{font-size:12.5px;color:var(--mut);padding-right:4px}
body.focus .zpill{opacity:.6}
/* hide the top while reading */
body.tophide .menubar,body.tophide .ribbon{display:none}
body.tophide::before{content:'';position:fixed;left:0;right:0;top:0;height:4px;background:var(--acc);opacity:.45;z-index:90}
body.loaded.hastabs .menubar{background:var(--bg)}
.menubar .wtab.on{background:var(--bar)}
body.dark.loaded.hastabs .menubar{background:var(--bg)}
.rtabs{min-height:38px}
.rmode{height:38px;display:flex;align-items:center}
body.ribmin .ribbon.pop{position:relative;top:auto;left:auto;right:auto;box-shadow:none;animation:none;display:block}
body.ribfull .ribrow{align-items:flex-start;align-content:flex-start}body.ribfull .rtabs{height:38px}
body.ribmin .ribbon.rpop{z-index:65}
/* v4.105 back to v4.103 layout + slim ribbon, PDF tab row only with 2+ PDFs */
body.loaded.hastabs .menubar{background:var(--bar)}
body.loaded.hastabs .menubar .name{display:block}
.menubar .rtabs{margin-left:4px;min-height:0;height:44px}
.menubar .rtab.on::after{bottom:-7px}
.menubar .rmode{height:44px}
.ribrow{min-height:0;padding:0 10px}
body.ribslim .rpanels{border-left:0;padding-left:0;height:38px}
body.ribfull .rpanels{order:0;margin:0 -10px;border-top:0}
body.ribmin .ribbon{border:0;height:0}
body.ribmin .ribbon.rpop .rpanels{top:0}
.wtabs{padding-left:64px}
.menubar{position:relative;z-index:25}
/* v4.106 the zoom pill hides while you read */
.zpill #zout,.zpill #zin{display:inline-flex!important}
body.loaded .zpill{opacity:0;pointer-events:none;transform:translate(-50%,10px);transition:opacity .2s,transform .2s}
body.loaded.pillshow .zpill,body.loaded .zpill:focus-within,body.loaded .zpill:hover{opacity:.96;pointer-events:auto;transform:translate(-50%,0)}
/* v4.107 group names on one line: every group fills the ribbon height, name pinned to the bottom */
body.ribfull .rpanel,body.ribmin .rpanel{height:96px;align-items:stretch;padding-top:4px}
body.ribfull .rgrp,body.ribmin .rgrp{justify-content:space-between}
body.ribfull .rbtns,body.ribmin .rbtns{align-items:center}
body.ribfull .rcol,body.ribmin .rcol{gap:0}
body.ribfull .rbtn.rs,body.ribmin .rbtn.rs{padding:3px 9px 3px 6px;min-height:24px}
body.ribfull .rgl,body.ribmin .rgl{padding:0 0 5px;line-height:13px}
body.ribfull .rbtns,body.ribmin .rbtns{align-items:flex-start;padding-top:2px}body.ribfull .rcol,body.ribmin .rcol{align-self:center}
/* v4.110 auto-backup switch + saved times */
.rstatus{display:flex;flex-direction:column;gap:1px;padding:2px 8px 0 8px;font:500 11px/1.35 Inter,sans-serif;color:var(--mut);white-space:nowrap}
.rstatus span::before{content:'';display:inline-block;width:6px;height:6px;border-radius:50%;background:#43a047;margin-right:6px;vertical-align:1px}
.rstatus span:nth-child(2)::before{background:var(--acc)}
.rlink{border:0;background:none;padding:0;font:inherit;color:var(--acc);cursor:pointer;text-decoration:underline}
.rbtn.rs[role=switch]::after{content:'';width:24px;height:14px;border-radius:7px;background:rgba(127,127,127,.35);margin-left:auto;flex:none;box-shadow:inset -10px 0 0 2px var(--bar);transition:.15s}
.rbtn.rs[role=switch].on::after{background:var(--acc);box-shadow:inset 10px 0 0 2px var(--bar)}
.rbtn.rs[role=switch]{gap:7px}
body.ribslim .rstatus{flex-direction:row;gap:10px;padding:0 8px}
.savechip{flex:none;display:flex;align-items:center;gap:6px;height:28px;padding:0 10px;border:0;border-radius:14px;background:none;color:var(--mut);font:500 12px Inter,sans-serif;cursor:pointer;white-space:nowrap}
.savechip:hover{background:var(--hov);color:var(--ink)}
.savechip i{width:7px;height:7px;border-radius:50%;background:#43a047}
.savechip i.bk{background:var(--acc);box-shadow:0 0 0 2px var(--accbg)}
.savechip i.warn{background:#f57c00}
body:not(.loaded) .savechip{display:none}
/* v4.111 PowerPoint-style top: blue title row (Quick Access · name · search · saved), ribbon tabs in the row below */
.menubar,body.loaded.hastabs .menubar{background:#3157F4;color:#fff;height:42px;gap:12px;padding:0 12px;z-index:30}
body.dark .menubar,body.dark.loaded.hastabs .menubar{background:#1f2f7a}
.menubar .brand svg rect:first-child{fill:#fff}
.menubar .brand svg rect:nth-child(2){fill:#3157F4}
.menubar .wordmark{color:#fff}.menubar .wordmark .acc{color:#FFD54A}
body.loaded .menubar .wordmark{display:none}
.menubar .name,body.loaded.hastabs .menubar .name{color:#fff;font-weight:600;font-size:13.5px;flex:0 1 auto;min-width:0;max-width:26vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:block}
.menubar .name .ftag{background:rgba(255,255,255,.22);color:#fff}
.qat{display:flex;align-items:center;gap:1px;position:relative}
.qbtn{width:30px;height:30px;border:0;background:none;border-radius:7px;display:grid;place-items:center;color:#fff;cursor:pointer;padding:0}
.qbtn:hover{background:rgba(255,255,255,.18)}
.qbtn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.qbtn.qmore{width:20px}.qbtn.qmore svg{width:14px;height:14px}
.qmenu{position:absolute;left:0;top:36px;z-index:90;width:280px;max-height:70vh;overflow:auto;background:var(--surf);color:var(--ink);border-radius:12px;box-shadow:0 0 0 1px var(--line),0 14px 34px rgba(28,34,48,.22);padding:8px}
.qmenu[hidden]{display:none}
.qmenu>b{display:block;font:600 13px Inter,sans-serif;padding:4px 8px 6px}
.qmg{font:600 10.5px Inter,sans-serif;color:var(--mut);text-transform:uppercase;letter-spacing:.04em;padding:8px 8px 3px}
.qmi{display:flex;align-items:center;gap:8px;padding:5px 8px;border-radius:7px;font-size:12.5px;cursor:pointer}
.qmi:hover{background:var(--hov)}
.qmi svg{width:16px;height:16px;fill:none;stroke:var(--acc);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.qmi input{accent-color:var(--acc);margin:0}
.qreset{margin:8px 8px 2px;border:0;background:none;color:var(--acc);font:500 12px Inter,sans-serif;cursor:pointer;padding:0}
.csearch{position:relative;flex:1;max-width:420px;margin:0 auto;display:flex;align-items:center;gap:7px;height:28px;padding:0 10px;border-radius:7px;background:rgba(255,255,255,.2);transition:background .15s}
.csearch:focus-within{background:#fff;box-shadow:0 0 0 2px rgba(255,255,255,.5)}
.csearch>svg{width:15px;height:15px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;flex:none}
.csearch:focus-within>svg{stroke:#3157F4}
.csearch input{flex:1;min-width:0;border:0;background:none;outline:0;color:#fff;font:13px Inter,sans-serif;height:100%}
.csearch input::placeholder{color:rgba(255,255,255,.85)}
.csearch:focus-within input{color:#1C2230}.csearch:focus-within input::placeholder{color:#8a93a6}
.csearch kbd{font:500 10px Inter,sans-serif;color:rgba(255,255,255,.75);border:1px solid rgba(255,255,255,.35);border-radius:4px;padding:1px 4px}
.csearch:focus-within kbd{display:none}
.cres{position:absolute;left:0;right:0;top:34px;z-index:95;background:var(--surf);color:var(--ink);border-radius:10px;box-shadow:0 0 0 1px var(--line),0 14px 34px rgba(28,34,48,.22);padding:6px}
.cres[hidden]{display:none}
.clbl{font:600 10.5px Inter,sans-serif;color:var(--mut);text-transform:uppercase;letter-spacing:.04em;padding:6px 8px 3px}
.copt{display:flex;align-items:center;gap:9px;width:100%;border:0;background:none;border-radius:7px;padding:7px 8px;text-align:left;font:500 13px Inter,sans-serif;color:var(--ink);cursor:pointer}
.copt svg{width:17px;height:17px;fill:none;stroke:var(--acc);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.copt span{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.copt small{color:var(--mut);font-size:11px}
.copt.on,.copt:hover{background:var(--accbg)}
.cnone{padding:8px;color:var(--mut);font-size:12.5px}
.menubar .savechip{color:#fff;background:rgba(255,255,255,.12)}
.menubar .savechip:hover{background:rgba(255,255,255,.24);color:#fff}
.savechip i{background:#7CF0A0}.savechip i.bk{background:#fff;box-shadow:0 0 0 2px rgba(255,255,255,.35)}.savechip i.warn{background:#FFB74D}.savechip i.offd{background:rgba(255,255,255,.45)}
.savepop{position:absolute;right:12px;top:40px;z-index:95;width:290px;background:var(--surf);color:var(--ink);border-radius:12px;box-shadow:0 0 0 1px var(--line),0 14px 34px rgba(28,34,48,.22);padding:12px;display:flex;flex-direction:column;gap:10px}
.savepop[hidden]{display:none}
.sprow{display:flex;gap:10px;align-items:flex-start}
.sprow>i{width:9px;height:9px;border-radius:50%;margin-top:5px;flex:none;background:#43a047}
.sprow>i.b{background:var(--acc)}.sprow>i.o{background:#f57c00}.sprow>i.n{background:rgba(127,127,127,.45)}
.sprow b{display:block;font:600 12.5px Inter,sans-serif}.sprow span{font-size:12px;color:var(--mut)}
.spsw{display:flex;align-items:center;justify-content:space-between;border:1px solid var(--line);border-radius:9px;background:none;padding:8px 10px;font:600 12.5px Inter,sans-serif;color:var(--ink);cursor:pointer}
.spsw i{width:30px;height:17px;border-radius:9px;background:rgba(127,127,127,.35);position:relative;transition:.15s}
.spsw i::after{content:'';position:absolute;left:2px;top:2px;width:13px;height:13px;border-radius:50%;background:#fff;transition:.15s;box-shadow:0 1px 2px rgba(0,0,0,.25)}
.spsw.on i{background:var(--acc)}.spsw.on i::after{left:15px}
.spbtns{display:flex;gap:6px}
/* ribbon tab row (below the title) */
.ribbon{border-top:0}
.ribrow{min-height:36px;padding:0 10px}
.ribbon .rtabs{height:36px;margin:0;align-self:flex-start}
.ribbon .rtab{height:28px;align-self:center}
.ribbon .rtab.on::after{bottom:-4px}
.ribbon .rmode{height:36px;align-self:flex-start;margin-left:auto}
body.ribslim .rpanels{border-left:1px solid var(--line);padding-left:6px;height:36px;margin-left:6px}
body.ribfull .ribrow{align-items:flex-start}
body.ribfull .rpanels{order:3;flex-basis:100%;margin:0 -10px;border-top:1px solid var(--line)}
body.ribmin .ribbon{height:auto;border-bottom:1px solid var(--line)}
body.ribmin .ribbon.rpop .rpanels{top:100%}
.menubar .rmodem{top:34px}
.ribbon .rmodem{top:34px}
body.tophide .menubar,body.tophide .ribbon{display:none}
body:not(.loaded) .csearch{max-width:320px}
body:not(.loaded) .qat{display:none}
.csearch input,body.dark .csearch input{background:transparent!important;border:0!important;box-shadow:none!important}
/* v4.112 search box truly centred, real logo, quieter save status */
.menubar{position:relative}
.csearch{position:absolute;left:50%;top:7px;transform:translateX(-50%);width:min(440px,34vw);max-width:none;margin:0}
.menubar .name,body.loaded.hastabs .menubar .name{max-width:max(80px,calc(50vw - 17vw - 230px))}
.menubar .brand svg rect:first-child{fill:#3157F4}
.menubar .brand svg rect:nth-child(2){fill:#fff}
.menubar .brand svg{border-radius:9px;box-shadow:0 0 0 1.5px rgba(255,255,255,.55)}
.menubar .savechip{margin-left:auto;background:none;padding:0 6px;height:28px;gap:6px;color:rgba(255,255,255,.88);font:500 12.5px Inter,sans-serif;border-radius:6px}
.menubar .savechip:hover{background:rgba(255,255,255,.14);color:#fff}
.menubar .savechip svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.menubar .savechip.warn{color:#FFD08A}
.menubar .savechip i{display:none}
/* v4.114 study desk: recent list beside Continue reading (same height), folders like on the computer */
.hrow{align-items:stretch}
.hrow>#hcontinue,.hrow>#hlatest{display:flex;flex-direction:column;min-width:0}
.hrow>#hcontinue>.ccard{flex:1}
.rlist{flex:1;height:auto;min-height:0;max-height:none;overflow:auto;padding:8px;gap:2px}


.rrowx{position:relative}
.ritem{display:flex;align-items:center;gap:12px;width:100%;border:0;background:none;border-radius:12px;padding:8px 10px;text-align:left;cursor:pointer;font:inherit;color:inherit}
.ritem:hover{background:var(--hov)}
.rthumb{width:34px;height:44px;flex:none;border-radius:5px;overflow:hidden;background:var(--bg);box-shadow:0 0 0 1px var(--line);display:grid;place-items:center}
.rthumb img{width:100%;height:100%;object-fit:cover;object-position:top}
.rthumb svg{width:20px;height:20px}
.rbody{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.rname{font:600 14px Inter,sans-serif;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rmeta{font-size:12px;color:var(--mut);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rbody .prog{width:70%;margin:2px 0 0}
.rgo{flex:none;font:700 11.5px Inter,sans-serif;color:var(--acc);background:var(--accbg);border-radius:8px;padding:3px 8px;margin-right:22px}
.rrowx .fx{position:absolute;right:6px;top:50%;transform:translateY(-50%);opacity:0}
.rrowx:hover .fx{opacity:1}
.crumbs{display:flex;align-items:center;gap:4px;flex-wrap:wrap;margin:2px 0 14px}
.crumb{border:0;background:none;font:600 13.5px Inter,sans-serif;color:var(--mut);padding:5px 8px;border-radius:8px;cursor:pointer}
.crumb:hover{background:var(--hov);color:var(--ink)}
.crumb.on{color:var(--ink)}
.crumb.back{font-size:15px;color:var(--acc);background:var(--accbg);padding:4px 10px;margin-right:4px}
.csep{color:var(--mut2,var(--mut));font-size:13px}
.ftiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;margin:0 0 18px}
.ftile{display:flex;align-items:center;gap:12px;border:0;background:var(--surf);border-radius:14px;box-shadow:var(--card);padding:12px 14px;text-align:left;cursor:pointer;font:inherit;color:inherit;transition:transform .12s,box-shadow .12s}
.ftile:hover{transform:translateY(-1px);box-shadow:var(--card),0 0 0 1.5px var(--acc)}
.ftile svg{width:28px;height:28px;flex:none;fill:#FFD54A;stroke:#E0A800;stroke-width:1.3;stroke-linejoin:round}
.ftn{flex:1;min-width:0;font:600 13.5px Inter,sans-serif;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ftc{font-size:12px;color:var(--mut);white-space:nowrap}
.hrow>#hlatest{height:0;min-height:100%}          /* the list takes the height of Continue reading and scrolls inside */
@media (max-width:900px){.hrow>#hlatest{height:auto;min-height:0}.rlist{max-height:360px}}
.rlist .ritem.fopen{flex-direction:row;align-items:center;justify-content:flex-start;height:auto;min-height:0;box-shadow:none;background:none;border-radius:12px;padding:8px 10px;width:100%;gap:12px;transform:none}
.rlist .ritem.fopen:hover{background:var(--hov);transform:none;box-shadow:none}
.rlist .rthumb img{max-height:none}