@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
/* Calm study theme: ONE accent (indigo) + neutral greys. Semantic colors only for correct / wrong / warning. */
:root{--pri:#6a5cf0;--pri-tx:#b2a9ff;--pri-soft:rgba(139,127,255,.13);--pri-line:rgba(139,127,255,.38);--on-pri:#fff;
 --violet:var(--pri);--pink:var(--pri);--coral:var(--pri);--teal:var(--pri);--blue:var(--pri);--cat:#9a93e6;--amber:#fbbf24;--warn:#fbbf24;
 --spectrum:var(--pri);--accent:var(--pri);--bg:#15171e;--bg2:none;
 --s1:#1d2029;--s2:#252935;--s3:#323746;--bd:#333949;--tx:#eceef4;--mu:#a6adbf;--sh:0 6px 20px rgba(0,0,0,.35);--sh2:none;
 --r:16px;--r2:12px;--ok:#4ade80;--no:#f87171;--ok-bg:rgba(74,222,128,.14);--no-bg:rgba(248,113,113,.14);--warn-bg:rgba(251,191,36,.14);color-scheme:dark}
html[data-theme=light]{--pri:#5b4bdb;--pri-tx:#4a3bc4;--pri-soft:rgba(91,75,219,.08);--pri-line:rgba(91,75,219,.32);--cat:#6c63c9;--amber:#b45309;--warn:#b45309;
 --bg:#f8f8fb;--s1:#ffffff;--s2:#f1f2f7;--s3:#e4e6ee;--bd:#dcdfe8;--tx:#1a1d29;--mu:#596072;--sh:0 6px 20px rgba(26,29,41,.08);--sh2:none;
 --ok:#15803d;--no:#b91c1c;--ok-bg:rgba(21,128,61,.10);--no-bg:rgba(185,28,28,.09);--warn-bg:rgba(180,83,9,.10);color-scheme:light}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--tx);font:16px/1.5 Inter,-apple-system,BlinkMacSystemFont,"SF Pro Text",system-ui,sans-serif;-webkit-text-size-adjust:100%}
body{background-image:var(--bg2);background-attachment:fixed;min-height:100vh}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em}h2{font-size:24px;margin:0}h3{font-size:18px;margin:.2em 0 .5em}
a{color:#a99dff}html[data-theme=light] a{color:#4c39d6}
button,select,summary,a,label{touch-action:manipulation;-webkit-tap-highlight-color:color-mix(in srgb,var(--pri) 25%,transparent)}button{cursor:pointer;font-family:inherit;color:inherit}
:focus-visible{outline:3px solid #f59e0b;outline-offset:2px;border-radius:10px}
/* header */
header{position:sticky;top:0;z-index:6;display:flex;align-items:center;gap:10px;padding:calc(var(--sat,env(safe-area-inset-top)) + 8px) max(14px,env(safe-area-inset-right)) 8px max(14px,env(safe-area-inset-left));
 background:rgba(13,11,31,.82);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--bd)}
html[data-theme=light] header{background:rgba(255,255,255,.85)}
header::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:3px;background:var(--spectrum);opacity:.9}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--tx);min-height:44px;background:none;border:0;padding:0}
.logo svg{width:34px;height:34px;filter:drop-shadow(0 3px 8px color-mix(in srgb,var(--pri) 40%,transparent))}
.wm{font-weight:800;font-size:19px;letter-spacing:-.02em;line-height:1}.wm b{background:var(--spectrum);-webkit-background-clip:text;background-clip:text;color:transparent}
.wm small{display:block;font-size:10.5px;font-weight:600;color:var(--mu);letter-spacing:.04em;text-transform:uppercase;margin-top:3px}
.hsp{flex:1}.ibtn{min-width:44px;min-height:44px;border-radius:14px;border:1px solid var(--bd);background:var(--s2);font-size:18px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 12px}
.ibtn .lbl{display:none;font-size:14px;color:var(--mu)}
/* nav */
main{padding:12px 12px calc(92px + env(safe-area-inset-bottom));max-width:760px;margin:0 auto}
nav{position:fixed;bottom:0;left:0;right:0;display:flex;background:rgba(23,20,46,.94);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-top:1px solid var(--bd);padding:4px 4px calc(4px + env(safe-area-inset-bottom));z-index:9}
html[data-theme=light] nav{background:rgba(255,255,255,.95)}
nav button{flex:1;min-height:52px;background:none;border:0;color:var(--mu);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;border-radius:14px;font-size:11px;font-weight:600;transition:all .2s}
nav button svg{width:23px;height:23px;transition:transform .2s}nav button.on{color:var(--tx)}
nav button.on svg{transform:translateY(-1px) scale(1.08);stroke:url(#gr)}nav button.on .nl{background:var(--accent);-webkit-background-clip:text;background-clip:text;color:transparent}
nav button.on::before{content:"";position:absolute;top:1px;left:50%;transform:translateX(-50%);width:28px;height:3px;border-radius:3px;background:var(--accent)}
nav button{position:relative}
/* page head */
.phead{display:flex;align-items:center;gap:10px;margin:4px 0 10px;grid-column:1/-1;column-span:all}
.back{min-width:44px;min-height:44px;border-radius:14px;border:1px solid var(--bd);background:var(--s2);font-size:20px}
.crumbs{font-size:12.5px;color:var(--mu);font-weight:600}.crumbs a{color:var(--mu);text-decoration:none}.crumbs a:hover{color:var(--tx)}
.ptitle{font-size:23px;font-weight:800;margin:0;letter-spacing:-.02em}
/* cards & controls */
.card{background:var(--s1);border:1px solid var(--bd);border-radius:var(--r);padding:14px;margin:10px 0;box-shadow:var(--sh2)}
.muted{color:var(--mu);font-size:13.5px}.weak{color:#fff;background:var(--pri);font-size:10.5px;font-weight:800;letter-spacing:.06em;padding:3px 8px;border-radius:99px}
.btn{min-height:44px;background:var(--accent);color:#fff;border:0;border-radius:14px;padding:10px 16px;font-weight:700;font-size:15px;box-shadow:0 6px 16px color-mix(in srgb,var(--pri) 28%,transparent);transition:transform .12s,filter .2s}
.btn:hover{filter:brightness(1.08)}.btn:active{transform:scale(.97)}
.btn.ghost{background:var(--s2);color:var(--tx);border:1px solid var(--bd);box-shadow:none}
.btn.teal{background:var(--pri);box-shadow:0 6px 16px color-mix(in srgb,var(--pri) 30%,transparent)}.btn.amber{background:var(--pri);box-shadow:0 6px 16px color-mix(in srgb,var(--pri) 30%,transparent)}
.row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px;align-items:center}
.mini{min-height:40px;font-size:13px;font-weight:600;border:1px solid var(--bd);background:var(--s2);color:var(--tx);border-radius:99px;padding:6px 13px;transition:all .15s}
.mini:hover{border-color:var(--violet)}.mini.vid{background:var(--pri-soft);border-color:var(--pri)}
.chips{display:flex;gap:8px;overflow-x:auto;padding:4px 2px 10px;-webkit-overflow-scrolling:touch;scrollbar-width:none}.chips::-webkit-scrollbar{display:none}
.chip{flex:none;min-height:44px;border:1px solid var(--bd);background:var(--s2);color:var(--tx);border-radius:99px;padding:8px 14px;font-size:14px;font-weight:600;transition:all .15s}
.chip:active{transform:scale(.96)}.chip.on{background:var(--c,var(--violet));border-color:transparent;color:#fff;box-shadow:0 6px 14px color-mix(in srgb,var(--c,var(--pri)) 45%,transparent)}
/* segmented mode control */
.seglbl{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--mu);margin:2px 2px 6px;display:flex;justify-content:space-between}
.seglbl b{color:var(--tx);text-transform:none;letter-spacing:0}
#modes.segs{display:flex;gap:6px;overflow-x:auto;padding:6px;background:var(--s1);border:1px solid var(--bd);border-radius:20px;margin-bottom:8px;scrollbar-width:none;box-shadow:var(--sh2)}
#modes .seg{flex:none;min-width:66px;min-height:56px;border-radius:14px;border:1px solid transparent;background:transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:6px 8px;font-size:11.5px;font-weight:700;color:var(--mu);box-shadow:none}
#modes .seg .i{font-size:19px;line-height:1}#modes .seg:hover{background:var(--s2);color:var(--tx)}
#modes .seg.on{background:var(--c);color:#fff;box-shadow:0 6px 16px color-mix(in srgb,var(--c) 50%,transparent);transform:translateY(-1px)}
/* chat */
.msg{padding:12px 14px;border-radius:18px;margin:10px 0;overflow-wrap:break-word}.u{background:var(--accent);color:#fff;margin-left:15%;border-bottom-right-radius:6px;box-shadow:0 6px 16px color-mix(in srgb,var(--pri) 25%,transparent)}
.a{background:var(--s1);border:1px solid var(--bd);border-top:3px solid var(--c,var(--violet));box-shadow:var(--sh2)}
.a .tag{display:inline-flex;gap:6px;align-items:center;font-size:11px;text-transform:uppercase;letter-spacing:.06em;font-weight:800;color:#fff;background:var(--c,var(--violet));padding:3px 9px;border-radius:99px;margin-bottom:6px}
.a td,.a th{border:1px solid var(--bd);padding:5px 7px;vertical-align:top}.a th{background:var(--s2)}
.typing{color:var(--mu);font-style:italic;display:flex;gap:10px;align-items:center}.typing::before{content:"";width:18px;height:18px;border-radius:50%;border:3px solid var(--s3);border-top-color:var(--pink);animation:spin .8s linear infinite;flex:none}
@keyframes spin{to{transform:rotate(360deg)}}
.diagram{background:#fff;border-radius:14px;padding:10px;overflow-x:auto;margin:10px 0;-webkit-overflow-scrolling:touch;color:#222}.diagram svg{max-width:100%;height:auto;min-width:280px}
form.ask{position:sticky;bottom:calc(68px + env(safe-area-inset-bottom));display:flex;gap:8px;background:var(--bg);padding:8px 0;z-index:3}
input,textarea,select{font:inherit;font-size:16px;background:var(--s1);color:var(--tx);border:1px solid var(--bd);border-radius:14px;padding:10px 12px;width:100%;min-height:44px}
input:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 3px color-mix(in srgb,var(--pri) 25%,transparent)}
.opt{display:block;width:100%;min-height:48px;text-align:left;margin:8px 0;background:var(--s2);color:var(--tx);border:1px solid var(--bd);border-radius:14px;padding:11px 13px;font-size:15px;transition:all .15s}
.opt:hover{border-color:var(--violet)}.opt.ok{background:rgba(34,197,94,.18);border-color:var(--ok)}.opt.no{background:rgba(244,63,94,.16);border-color:var(--no)}
.bar{height:10px;background:var(--s3);border-radius:9px;overflow:hidden}.bar i{display:block;height:100%;background:var(--spectrum);border-radius:9px;transition:width .6s}
label.ck{display:flex;gap:10px;align-items:flex-start;padding:6px 0;min-height:44px}label.ck input{width:22px;height:22px;min-height:0;flex:none;accent-color:var(--pink);margin-top:2px}
/* topics */
details.tcard{border-left:5px solid var(--c);padding:0;overflow:hidden}details.tcard>summary{list-style:none;display:flex;gap:12px;align-items:center;padding:12px 14px;min-height:56px;cursor:pointer}
details.tcard>summary::-webkit-details-marker{display:none}.tico{width:40px;height:40px;border-radius:12px;flex:none;display:grid;place-items:center;font-size:20px;background:color-mix(in srgb,var(--c) 22%,transparent);border:1px solid color-mix(in srgb,var(--c) 50%,transparent)}
.tmeta{flex:1;min-width:0}.tmeta b{display:block}.tbar{height:5px;border-radius:5px;background:var(--s3);margin-top:6px;overflow:hidden}.tbar i{display:block;height:100%;background:var(--c)}
details.tcard>summary::after{content:"›";font-size:24px;color:var(--mu);transition:transform .2s}details.tcard[open]>summary::after{transform:rotate(90deg)}
details.tcard .tbody{padding:0 14px 14px}details.tcard .card{box-shadow:none;background:var(--s2)}
/* home */
.hero{position:relative;overflow:hidden;border-radius:24px;padding:18px;color:#fff;background:var(--pri);box-shadow:0 14px 34px color-mix(in srgb,var(--pri) 35%,transparent);margin:6px 0 12px}
.hero::after{content:"";position:absolute;right:-40px;top:-40px;width:180px;height:180px;background:var(--pri);opacity:.22;border-radius:40%;filter:blur(2px);animation:spin 24s linear infinite;z-index:0;pointer-events:none}
.hero>*{position:relative;z-index:1}
.hero h2{font-size:22px;position:relative}.hero p{margin:.4em 0 0;opacity:.95;position:relative}
.cd{display:flex;align-items:baseline;gap:8px;margin-top:10px;position:relative}.cd b{font-size:40px;font-weight:800;line-height:1}.cd span{font-weight:600;opacity:.95}
.hero .row{position:relative}.hero .btn{background:#fff;color:var(--pri);box-shadow:0 6px 16px rgba(0,0,0,.15)}.hero .btn.ghost{background:rgba(255,255,255,.18);color:#fff;border-color:rgba(255,255,255,.4)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}.qs{min-height:84px;border-radius:18px;border:0;color:#fff;text-align:left;padding:12px;font-weight:700;font-size:14.5px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:var(--sh2);transition:transform .12s}
.qs:active{transform:scale(.97)}.qs .i{font-size:24px}.qs small{font-weight:500;opacity:.92;font-size:12px}
.rings{display:flex;gap:10px;justify-content:space-around;flex-wrap:wrap}.ring{display:flex;flex-direction:column;align-items:center;gap:4px;font-size:12px;font-weight:700;color:var(--mu)}
.ring svg{width:76px;height:76px}.ring .v{font-size:15px;fill:var(--tx);font-weight:800}
.weakrow{display:flex;align-items:center;gap:10px;padding:8px 0;border-top:1px solid var(--bd)}.weakrow:first-of-type{border-top:0}.weakrow .tmeta{font-size:14.5px}
.empty{text-align:center;padding:26px 14px}.empty .big{font-size:40px}.empty b{display:block;font-size:17px;margin:6px 0}
/* search */
#srch{position:fixed;inset:0;z-index:30;background:rgba(8,6,20,.6);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:none;padding:calc(env(safe-area-inset-top) + 10px) 12px 12px}
#srch.open{display:block}#srch .box{max-width:680px;margin:0 auto;background:var(--s1);border:1px solid var(--bd);border-radius:22px;box-shadow:var(--sh);overflow:hidden;max-height:calc(100vh - 40px);display:flex;flex-direction:column}
#srch .sh{display:flex;gap:8px;padding:10px;border-bottom:1px solid var(--bd)}#srch .res{overflow-y:auto;padding:6px 10px 12px}
.sgrp{font-size:11px;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--mu);margin:10px 4px 4px}
.sitem{display:flex;gap:10px;align-items:center;width:100%;text-align:left;min-height:48px;border:0;background:none;border-radius:12px;padding:8px;color:var(--tx);font-size:14.5px}.sitem:hover,.sitem:focus{background:var(--s2)}
.sitem .tico{width:32px;height:32px;font-size:16px}.sitem small{display:block;color:var(--mu);font-size:12px}
/* video player */
#stage:empty{display:none}.stage-empty{display:none}
body.vplaying #stage{position:fixed;left:0;right:0;top:0;bottom:calc(64px + env(safe-area-inset-bottom));z-index:8;background:var(--bg);background-image:var(--bg2);overflow-y:auto;padding:calc(var(--sat,env(safe-area-inset-top)) + 8px) 12px 12px;-webkit-overflow-scrolling:touch}
.player{max-width:760px;margin:0 auto}.ptop{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:6px}
.dots{display:flex;gap:5px;margin:6px 0 10px}.dots i{flex:1;height:5px;border-radius:5px;background:var(--s3)}.dots i.done{background:var(--accent)}.dots i.cur{background:var(--pri)}
.scene{background:var(--s1);border:1px solid var(--bd);border-radius:var(--r);padding:14px;min-height:220px;box-shadow:var(--sh2)}.scene.enter{animation:sin .45s ease-out}
@keyframes sin{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}
.snum{font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--amber);font-weight:800}.scene h3{margin:4px 0 8px;font-size:21px}
.sb{padding-left:18px}.sb li{margin:6px 0;transition:all .35s}.sb li.todo{opacity:.4}.sb li.seen{opacity:.8}.sb li.hi{opacity:1;background:var(--pri-soft);border-radius:8px;padding:3px 7px;margin-left:-7px;transform:translateX(4px)}
.cap{background:#0a0816;color:#fff;border-radius:14px;padding:11px 13px;margin:10px 0;min-height:48px;font-size:16px;line-height:1.4;border:1px solid #2e2a55}
.ctl{display:flex;gap:10px;align-items:center;justify-content:center}.pc{min-width:54px;min-height:48px;border-radius:14px;border:1px solid var(--bd);background:var(--s2);color:var(--tx);font-size:20px}.pc.main{background:var(--accent);border-color:transparent;color:#fff;min-width:76px}
.ctl select{width:auto;min-height:48px;padding:6px 12px;-webkit-appearance:none;appearance:none;background:var(--s2);color:var(--tx);font-weight:700;text-align:center}
.scene .diagram.big svg{min-width:0}
#toast{position:fixed;left:50%;bottom:calc(92px + env(safe-area-inset-bottom));transform:translateX(-50%) translateY(20px);background:var(--accent);color:#fff;padding:10px 16px;border-radius:14px;font-size:14px;font-weight:600;opacity:0;pointer-events:none;transition:all .25s;z-index:40;max-width:90vw;text-align:center;box-shadow:var(--sh)}
#toast.show{opacity:1;transform:translateX(-50%)}
@media (max-width:1023px){.scene .diagram.big svg{max-height:30vh}.scene{min-height:0}
 .ctl{position:sticky;bottom:-12px;background:var(--bg);padding:8px 0 12px;z-index:2}.cap{position:sticky;bottom:56px;z-index:2;margin-bottom:0}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
/* ---------- desktop ---------- */
@media (min-width:1024px){
  body{padding-left:236px;font-size:16.5px}
  header{padding:12px 32px}.ibtn .lbl{display:inline}#sbtn{min-width:280px;justify-content:flex-start}
  nav{top:0;bottom:0;right:auto;width:236px;flex-direction:column;justify-content:flex-start;gap:4px;padding:84px 14px 14px;border-top:0;border-right:1px solid var(--bd)}
  nav::before{content:"";position:absolute;top:0;bottom:0;right:-1px;width:3px;background:var(--pri);opacity:.8}
  nav button{flex:none;flex-direction:row;gap:12px;justify-content:flex-start;padding:10px 14px;min-height:48px;font-size:15px}
  nav button:hover{background:var(--s2);color:var(--tx)}nav button.on{background:var(--s2);box-shadow:inset 0 0 0 1px var(--bd)}
  nav button.on::before{width:4px;height:26px;left:0;top:11px;transform:none}
  main{max-width:1200px;padding:18px 32px 40px}
  .v-tutor{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:24px;align-items:start}
  .tpane{min-width:0}form.ask{bottom:0}#modes.segs{flex-wrap:wrap;overflow:visible}
  #stage,body.vplaying #stage{position:sticky;top:96px;left:auto;right:auto;bottom:auto;z-index:1;display:block;max-height:calc(100vh - 116px);overflow-y:auto;background:var(--s1);border:1px solid var(--bd);border-radius:22px;padding:16px;box-shadow:var(--sh)}
  .stage-empty{display:block}.diagram svg{min-width:0}
  .diagram.big svg{width:100%;max-height:66vh}.scene{min-height:320px}.scene h3{font-size:24px}.sb li{font-size:18px}.cap{font-size:18px}
  .v-topics .tlist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px;align-items:start}
  .v-resources .rlist{columns:2;column-gap:18px}.v-resources .card{break-inside:avoid;margin-top:0}
  .v-home .hgrid{display:grid;grid-template-columns:1.2fr 1fr;gap:16px;align-items:start}.grid2{grid-template-columns:repeat(4,1fr)}.hero{padding:26px}.hero h2{font-size:28px}
  .v-practice .card{max-width:860px}#toast{bottom:28px;left:calc(50% + 118px)}
}
@media (min-width:1400px){.v-topics .tlist{grid-template-columns:repeat(3,minmax(0,1fr))}.v-resources .rlist{columns:3}}
@media (min-width:1024px){.diagram svg{width:100%;max-width:100%!important}.diagram.big svg{width:100%!important;max-width:none!important;height:auto;max-height:none}
 .v-tutor .tpane #modes.segs{position:sticky;top:76px;z-index:4;background:var(--s1)}}
/* v9 single-answer tutor */
.qhead{display:flex;flex-direction:column;gap:2px;padding:12px 16px;border-radius:16px;background:var(--pri-soft);border:1px solid color-mix(in srgb,var(--pri) 35%,transparent);margin:10px 0 6px}
.qhead .muted{font-size:12px;text-transform:uppercase;letter-spacing:.06em}
.qhead b{font-size:17px;line-height:1.35}
#ans{animation:ansIn .25s ease;border-left:4px solid var(--c,var(--pri))}
@keyframes ansIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.skel{display:grid;gap:8px;margin-top:12px}.skel i{display:block;height:12px;border-radius:6px;background:var(--pri-soft);background-size:200% 100%;animation:sk 1.2s linear infinite}
.skel i:nth-child(2){width:85%}.skel i:nth-child(3){width:60%}
@keyframes sk{to{background-position:-200% 0}}
.seg.cached::after{content:'';position:absolute;top:6px;right:6px;width:7px;height:7px;border-radius:50%;background:var(--c);box-shadow:0 0 0 2px var(--bg,#0f0b1e)}
.seg{position:relative}
details.prevq{margin:14px 0 4px;border-radius:14px;border:1px dashed color-mix(in srgb,var(--pri) 40%,transparent);padding:4px 10px}
details.prevq summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:600}
details.prevq .prev-item{display:block;width:100%;text-align:left;margin:6px 0;min-height:44px}
.vlabel{text-align:center;margin-top:6px;font-size:12px}
.ahint{font-size:12.5px;margin:-2px 0 8px}

.tscroll{position:relative;overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%;margin:10px 0;border:1px solid var(--bd);border-radius:12px;background:linear-gradient(to right,var(--s1) 30%,transparent) left/40px 100% no-repeat local,linear-gradient(to left,var(--s1) 30%,transparent) right/40px 100% no-repeat local,radial-gradient(farthest-side at 100% 50%,rgba(0,0,0,.28),transparent) right/14px 100% no-repeat scroll}
table{border-collapse:separate;border-spacing:0;font-size:13.5px;line-height:1.4}
table th,table td{word-break:normal!important;overflow-wrap:normal!important;hyphens:manual;-webkit-hyphens:manual;min-width:8.5rem;padding:8px 10px;vertical-align:top;text-align:left;border-bottom:1px solid var(--bd)}
table tr>:first-child{min-width:7.5rem;font-weight:700;position:sticky;left:0;z-index:1;background:var(--s2);box-shadow:1px 0 0 var(--bd)}
table th{background:var(--s2);font-weight:700}
.tscroll table{width:100%}
.chip,.mini,.card,button,h1,h2,h3,h4{word-break:normal;overflow-wrap:break-word;hyphens:manual}
@media(min-width:900px){table{font-size:14px}}
/* ===== v12: videos, figures, polish ===== */
:root{--sp:12px;--r:18px;--r2:12px;--fs-s:13px;--fs-m:15px;--ease:cubic-bezier(.2,.8,.2,1)}
.qs.wide{grid-column:1/-1;min-height:72px}
.watch{margin:14px 0 6px}.watch h4{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:0 0 10px;font-size:16px}.watch h4 small{font-weight:500;color:var(--mu);font-size:12px;flex-basis:100%}
.wico{width:30px;height:30px;border-radius:10px;display:inline-grid;place-items:center;background:var(--pri);font-size:16px}
.vgrid{display:grid;grid-template-columns:1fr;gap:12px}
.vcard{margin:0;background:var(--s1);border:1px solid var(--bd);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh2);transition:transform .2s var(--ease),box-shadow .2s}
.vcard:hover{transform:translateY(-2px);box-shadow:var(--sh)}
.vframe{position:relative;aspect-ratio:16/9;background:#000;cursor:pointer;overflow:hidden}.vframe img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s var(--ease)}.vframe:hover img{transform:scale(1.04)}
.vframe iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.vplay{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:58px;height:58px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:22px;padding-left:4px;background:var(--pri);box-shadow:0 8px 24px color-mix(in srgb,var(--pri) 50%,transparent)}
.vlen{position:absolute;right:8px;bottom:8px;background:rgba(0,0,0,.75);color:#fff;font-size:12px;font-weight:700;border-radius:6px;padding:2px 6px}
.vcard figcaption{padding:10px 12px 12px;display:flex;flex-direction:column;gap:3px}.vcard figcaption b{font-size:14px;line-height:1.3}.vcard figcaption span{font-size:12px;color:var(--mu)}
.figlink{display:flex;align-items:center;gap:8px;width:100%;margin:10px 0;min-height:48px;padding:10px 14px;border-radius:14px;border:1px solid color-mix(in srgb,var(--c) 50%,transparent);background:color-mix(in srgb,var(--c) 16%,var(--s1));color:var(--tx);font-weight:700;font-size:14px;text-align:left;transition:transform .15s,background .2s}
.figlink:hover{transform:translateX(3px);background:color-mix(in srgb,var(--c) 26%,var(--s1))}
.figtabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:10px 0}
.figtab{display:flex;gap:10px;align-items:center;text-align:left;padding:10px;border-radius:14px;border:1px solid var(--bd);background:var(--s1);min-height:60px;transition:all .2s var(--ease)}
.figtab .fi{width:36px;height:36px;flex:none;border-radius:11px;display:grid;place-items:center;font-size:18px;background:color-mix(in srgb,var(--c) 22%,transparent)}
.figtab b{display:block;font-size:13px;line-height:1.25}.figtab small{display:block;font-size:11px;color:var(--mu)}
.figtab.on{border-color:var(--c);background:color-mix(in srgb,var(--c) 18%,var(--s1));box-shadow:0 6px 18px color-mix(in srgb,var(--c) 30%,transparent)}
.figbox{border-top:4px solid var(--c);padding:16px}.figbox.fin{animation:fin .35s var(--ease)}
@keyframes fin{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.pop{animation:fin .3s var(--ease)}
.fsvg{width:100%;height:auto;display:block;margin:10px 0;max-height:52vh}.fbg{fill:var(--s2);stroke:var(--bd)}.ax{fill:var(--mu);font-size:10px;font-weight:600}.lb{font-size:10px;font-weight:700}
.dot{stroke:#fff;stroke-width:3;transition:all .25s var(--ease)}.dot.ok{fill:#22c55e}.dot.warn{fill:#f59e0b}.dot.act{fill:var(--pri)}.dot.stop{fill:#f43f5e}
.sl{margin:10px 0}.sl label{display:block;font-size:14px;margin-bottom:4px}.sl small{color:var(--mu)}
input[type=range]{width:100%;accent-color:var(--c,var(--pri));height:28px}
.verdict{padding:12px 14px;border-radius:14px;font-weight:700;font-size:14.5px;transition:background .25s}
.verdict.ok,.fnode.ok{background:rgba(34,197,94,.16);border-left:5px solid #22c55e}.verdict.warn,.fnode.warn{background:rgba(245,158,11,.16);border-left:5px solid #f59e0b}
.verdict.act,.fnode.act{background:rgba(59,130,246,.16);border-left:5px solid var(--pri)}.verdict.stop{background:rgba(244,63,94,.16);border-left:5px solid #f43f5e}
.small{font-size:12.5px;margin-top:10px}
.flow{display:flex;flex-direction:column;gap:0}.fnode{position:relative;padding:12px 14px;border-radius:14px;background:var(--s2);border:1px solid var(--bd);margin-bottom:18px}
.fnode:not(:last-child)::after{content:"";position:absolute;left:28px;bottom:-19px;width:3px;height:18px;background:var(--pri);border-radius:2px}
.fnode.start{background:var(--pri-soft)}.fnode.done{padding:8px 14px;font-size:13px;color:var(--mu)}.fnode p{margin:6px 0 0;font-size:14px}
.btn.sm{min-height:40px;padding:8px 13px;font-size:14px}.btn.ghost{background:var(--s3);color:var(--tx);box-shadow:none;border:1px solid var(--bd)}
.vs{fill:none;stroke-width:6;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:10 8;animation:flow 1.4s linear infinite}.vs.ox{stroke:#ef4444}.vs.mix{stroke:var(--pri)}.vs.de{stroke:var(--pri)}
@keyframes flow{to{stroke-dashoffset:-36}}.ch{fill:color-mix(in srgb,#e11d48 22%,transparent);stroke:#e11d48;stroke-width:2}.lung{fill:color-mix(in srgb,var(--pri) 18%,transparent);stroke:var(--pri)}.plac{fill:rgba(249,115,22,.22);stroke:var(--pri)}
.hot{cursor:pointer}.hot circle{fill:#f59e0b;stroke:#fff;stroke-width:2.5;transition:all .2s;transform-box:fill-box;transform-origin:center;animation:pulse 2s infinite}.hot text{fill:#1b1640;font-weight:800;font-size:12px;pointer-events:none}
.hot.on circle,.hot:hover circle{fill:#22c55e;animation:none;transform:scale(1.2)}@keyframes pulse{50%{transform:scale(1.12)}}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--mu)}.legend i{display:inline-block;width:12px;height:12px;border-radius:4px;margin-right:5px;vertical-align:-1px}
.reveal{margin:12px 0;padding:12px 14px;border-radius:14px;background:var(--s2);border:1px solid var(--bd);min-height:64px}.reveal p{margin:6px 0 0;font-size:14px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.labs{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0}.lab{padding:6px 11px;border-radius:99px;font-size:13px;font-weight:700;background:var(--s2);border:1px solid var(--bd);opacity:.45;transition:all .3s var(--ease)}
.lab.on{opacity:1;background:color-mix(in srgb,var(--c) 22%,var(--s1));border-color:var(--c);transform:scale(1.04)}
.stepcard{display:flex;gap:12px;align-items:flex-start;padding:14px;border-radius:16px;background:var(--s2);min-height:120px;margin-bottom:10px}.stepcard .big{font-size:34px;line-height:1}.stepcard p{margin:6px 0 0;font-size:14.5px}
.dots{display:flex;gap:6px;flex:1;justify-content:center}.dots i{width:8px;height:8px;border-radius:50%;background:var(--bd);transition:all .25s}.dots i.on{width:22px;border-radius:5px;background:var(--c,var(--pri))}
.tline{display:flex;overflow-x:auto;gap:4px;padding-bottom:4px;scrollbar-width:none}.tick{flex:none;font-size:12px;font-weight:700;padding:6px 9px;border-radius:99px;border:1px solid var(--bd);background:var(--s2);transition:all .2s}.tick.on{background:color-mix(in srgb,var(--pri) 30%,var(--s1));border-color:var(--pri)}
.mgrid{display:grid;gap:10px;margin-top:12px}.mcard{padding:12px 14px;border-radius:14px;background:color-mix(in srgb,var(--c) 12%,var(--s1));border-left:5px solid var(--c)}.mcard p{margin:6px 0 0;font-size:14px}
table.vax{border-collapse:separate;border-spacing:3px;font-size:12px;min-width:640px}table.vax th{font-size:11px;white-space:nowrap;padding:4px;color:var(--mu)}table.vax td{text-align:center;padding:0;min-width:40px;height:34px;border-radius:8px;background:var(--s2)}
table.vax th:first-child{position:sticky;left:0;background:var(--s1);z-index:1}.vxn{border:0;background:none;font-weight:800;font-size:12.5px;padding:4px;color:var(--tx)}
.vd{width:100%;height:34px;border:0;border-radius:8px;background:var(--c);color:#fff;font-weight:800;transition:transform .15s}.vd:hover{transform:scale(1.08)}tr.hl td{background:color-mix(in srgb,var(--pri) 22%,var(--s2))}
.figfoot{margin-top:14px}
/* AI diagram styling + zoom */
.diagram[data-ok]{cursor:zoom-in;border-radius:16px;background:var(--s2);padding:10px;position:relative;transition:box-shadow .2s}.diagram[data-ok]:hover{box-shadow:0 0 0 2px var(--pri)}
.diagram[data-ok]::after{content:"⤢ Tap to zoom";position:absolute;right:8px;top:8px;font-size:11px;font-weight:700;background:color-mix(in srgb,var(--pri) 90%,transparent);color:#fff;border-radius:99px;padding:2px 8px}
.diagram .node rect,.diagram .node polygon,.diagram .node circle{rx:12px;ry:12px;stroke-width:2px!important}
.diagram .node:nth-child(6n+1) rect{fill:#ede9fe!important;stroke:var(--pri)!important}.diagram .node:nth-child(6n+2) rect{fill:#fce7f3!important;stroke:var(--pri)!important}.diagram .node:nth-child(6n+3) rect{fill:#ffedd5!important;stroke:var(--pri)!important}
.diagram .node:nth-child(6n+4) rect{fill:#ccfbf1!important;stroke:var(--pri)!important}.diagram .node:nth-child(6n+5) rect{fill:#dbeafe!important;stroke:var(--pri)!important}.diagram .node:nth-child(6n) rect{fill:#fef3c7!important;stroke:#f59e0b!important}
.diagram .node polygon{fill:#fef9c3!important;stroke:#eab308!important}.diagram .edgePath path,.diagram .flowchart-link{stroke-width:2.2px!important}
#zoom{position:fixed;inset:0;z-index:40;background:rgba(10,8,25,.78);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:none;align-items:center;justify-content:center;padding:16px}#zoom.open{display:flex;animation:fin .25s}
#zoom .zbox{background:var(--s1);border-radius:20px;padding:14px;width:min(1100px,100%);max-height:90vh;overflow:auto;-webkit-overflow-scrolling:touch}#zoom .zx{float:right}#zoom .zd svg{width:100%!important;max-width:none!important;height:auto;min-width:560px}
/* polish: consistent radius, type, spacing, icons */
.card,.vcard,.figtab,.reveal,.fnode{border-radius:var(--r)}.mini,.btn,.figtab,.qs,.tico,.card{transition:transform .15s var(--ease),box-shadow .2s,background .2s,border-color .2s}
.btn:hover,.mini:hover{transform:translateY(-1px)}.mini:hover{border-color:var(--pri)}
.tico,.fi,.wico{line-height:1;font-family:"Apple Color Emoji","Segoe UI Emoji","Noto Color Emoji",sans-serif}
.qs .i{width:36px;height:36px;display:grid;place-items:center;border-radius:11px;background:rgba(255,255,255,.2);font-size:20px;line-height:1}
.muted{line-height:1.45}p{line-height:1.55}h3{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.card h3{font-size:17px}.ptitle{font-size:24px;margin:2px 0}
.empty{text-align:center;padding:26px 16px}.empty .big{font-size:40px;line-height:1;margin-bottom:8px}.empty b{display:block;font-size:16px;margin-bottom:4px}
main{overflow-wrap:break-word}img,svg,iframe{max-width:100%}
html[data-theme=light] .hot text{fill:#1b1640}html[data-theme=light] table.vax th:first-child{background:#fff}
@media (min-width:700px){.vgrid{grid-template-columns:repeat(2,1fr)}.figtabs{grid-template-columns:repeat(3,1fr)}.mgrid{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1024px){.vgrid{grid-template-columns:repeat(3,1fr)}.v-figures{display:block}.figtabs{grid-template-columns:repeat(6,1fr)}.figtab{flex-direction:column;align-items:flex-start;min-height:100px}
 .figbox{max-width:1100px}.fsvg{max-height:420px}.grid2 .qs.wide{grid-column:1/-1}#stage .watch .vgrid{grid-template-columns:1fr}}
@media (max-width:1023px){#tabs .nl{font-size:10px;letter-spacing:-.01em;white-space:nowrap}#tabs button{min-width:0;padding-left:0;padding-right:0}}
@media (min-width:1024px){.bwrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:24px;align-items:center}.figbox .fsvg{max-height:380px}}
@media (min-width:1024px){#chat .watch.dup{display:none}#stage .watch{margin:0}#stage .vgrid{grid-template-columns:1fr 1fr!important}#stage .vcard:first-child{grid-column:1/-1}}
table.vax th,table.vax td{min-width:44px!important;padding:3px!important;border-bottom:0;vertical-align:middle;text-align:center}table.vax tr>:first-child{min-width:78px!important;text-align:left;box-shadow:none}table.vax{width:auto!important}
/* ---------- Study Studio (v13) ---------- */
.shero{display:flex;gap:14px;align-items:center;padding:16px;border-radius:22px;margin:4px 0 12px;background:var(--pri-soft);border:1px solid var(--bd)}
.shero h2{margin:0 0 4px;font-size:21px}.shero p{margin:0;color:var(--mu);font-size:14px;line-height:1.45}
.ava{display:inline-block;width:var(--z);height:var(--z);flex:none;filter:drop-shadow(0 6px 12px color-mix(in srgb,var(--pri) 35%,transparent))}.ava svg{width:100%;height:100%;overflow:visible}
.ava svg{animation:bob 3.2s var(--ease,ease) infinite}.ava .eyes{transform-origin:40px 46px;animation:blink 4.5s infinite}
.ava.wave svg{animation:wave 2.4s ease-in-out infinite;transform-origin:50% 90%}.ava.think .pu{transform:translate(1.5px,-2px)}.ava.think svg{animation:bob 1.4s ease-in-out infinite}
.ava.talk .mouth{animation:talk .28s ease-in-out infinite alternate;transform-origin:40px 59px}.ava .ray{animation:ray 2s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(-4px)}}@keyframes blink{0%,92%,100%{transform:scaleY(1)}95%{transform:scaleY(.1)}}@keyframes wave{0%,100%{transform:rotate(0)}25%{transform:rotate(-6deg)}75%{transform:rotate(6deg)}}
@keyframes talk{from{transform:scaleY(.5)}to{transform:scaleY(1.6)}}@keyframes ray{50%{opacity:.35}}
@media (prefers-reduced-motion:reduce){.ava svg,.ava *{animation:none!important}}
.stabs{display:flex;gap:8px;overflow-x:auto;padding:2px 2px 10px;scrollbar-width:none}.stabs::-webkit-scrollbar{display:none}
.stab{flex:none;min-height:42px;padding:8px 14px;border-radius:999px;border:1px solid var(--bd);background:var(--s2);color:var(--tx);font-weight:700;font-size:14px;white-space:nowrap}
.stab.on{background:var(--accent);color:#fff;border-color:transparent;box-shadow:0 6px 16px color-mix(in srgb,var(--pri) 25%,transparent)}.pill{display:inline-block;padding:1px 7px;border-radius:999px;background:rgba(255,255,255,.22);font-size:12px;margin-left:2px}.stab:not(.on) .pill{background:var(--s3)}
.lgrid{display:grid;gap:12px}.lcard{display:block;text-align:left;width:100%;padding:14px;border-radius:18px;background:var(--s1);border:1px solid var(--bd);border-left:5px solid var(--c);color:var(--tx);box-shadow:var(--sh2)}
.lc-top{display:flex;gap:10px;align-items:center}.lic{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:22px;background:color-mix(in srgb,var(--c,var(--pri)) 22%,transparent);flex:none}
.lc-t{flex:1;min-width:0}.lc-t b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lc-t small{color:var(--mu)}.lpct{font-weight:800;font-size:18px;color:var(--c)}
.lc-st{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:8px;font-size:13px;color:var(--mu)}.lc-st b{color:var(--tx)}.lcard .tbar{margin-top:10px}
.sempty{padding:22px 10px;text-align:center}.sempty b{display:block;margin:8px 0 4px;font-size:17px}
.upc textarea,.upc input:not([type=file]),.cform input{width:100%;box-sizing:border-box;background:var(--s2);color:var(--tx);border:1px solid var(--bd);border-radius:14px;padding:12px;font:inherit;font-size:16px;margin:8px 0}
.drop{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;padding:22px 14px;border:2px dashed color-mix(in srgb,var(--pri) 60%,transparent);border-radius:18px;background:color-mix(in srgb,var(--pri) 8%,transparent);cursor:pointer;transition:all .2s}
.drop.hov,.drop:hover{background:color-mix(in srgb,var(--pri) 12%,transparent);border-color:var(--pri)}.dic{font-size:30px}.drop b{overflow-wrap:anywhere}
.or{text-align:center;color:var(--mu);font-size:13px;margin:12px 0 2px}.small{font-size:12.5px}
.sethead{display:flex;gap:12px;align-items:center;padding:12px 14px;border-radius:18px;background:var(--s1);border:1px solid var(--bd);border-top:4px solid var(--c);margin-bottom:10px}.sethead b{display:block;font-size:17px}.sethead .tbar{margin:6px 0 4px}
.sprog{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;padding:10px 12px;border-radius:14px;background:var(--s2);margin-bottom:10px;font-weight:600}.sprog .bar{flex-basis:100%}
.note{border-left:4px solid var(--c)}.note h2{font-size:17px;margin:0 0 6px}.notes{display:grid;gap:12px}
.fcwrap{max-width:620px;margin:0 auto}.fcmeta{text-align:center;margin-bottom:8px}
.fc{display:block;width:100%;height:260px;perspective:1200px;background:none;border:0;padding:0;color:var(--tx)}.fcin{position:relative;width:100%;height:100%;transition:transform .55s var(--ease,ease);transform-style:preserve-3d}.fc.flip .fcin{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:22px;padding:22px;display:flex;flex-direction:column;justify-content:center;gap:10px;font-size:18px;line-height:1.45;box-shadow:var(--sh);overflow:auto;text-align:center}
.face.front{background:var(--s1);border:1px solid var(--bd);border-top:6px solid var(--c)}.face.back{transform:rotateY(180deg);background:var(--pri);border:1px solid var(--bd)}
.face small{letter-spacing:.12em;font-weight:800;color:var(--c);font-size:11px}.tap{font-size:12px}
.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:12px 0}.grade{min-height:56px;border-radius:14px;border:1px solid var(--bd);background:var(--s2);color:var(--tx);border-bottom:4px solid var(--c)}.grade b{display:block}.grade small{color:var(--mu)}
.qhead{display:flex;align-items:center;gap:8px;margin-bottom:8px}.qhead .mini{margin-left:auto}
.qz{position:relative;border-left:4px solid var(--bd)}.qz.ok{border-left-color:#22c55e}.qz.bad{border-left-color:#ef4444}.qn{font-weight:800;color:var(--pri-tx);font-size:12px;letter-spacing:.08em}.qs2{margin:4px 0 10px;line-height:1.5}
.opts{display:grid;gap:8px}.opt{display:flex;gap:10px;align-items:flex-start;text-align:left;min-height:46px;padding:10px 12px;border-radius:12px;border:1px solid var(--bd);background:var(--s2);color:var(--tx);font-size:15px}
.ol{flex:none;width:24px;height:24px;border-radius:8px;display:grid;place-items:center;background:var(--s3);font-weight:800;font-size:13px}.opt.right{border-color:#22c55e;background:color-mix(in srgb,#22c55e 16%,var(--s2))}.opt.wrong{border-color:#ef4444;background:color-mix(in srgb,#ef4444 14%,var(--s2))}
.why{margin-top:10px;padding:10px 12px;border-radius:12px;background:var(--s2);font-size:14.5px;line-height:1.5}
.chatwrap{display:flex;flex-direction:column;gap:8px}.tutorhead{display:flex;gap:12px;align-items:center;padding:10px 12px;border-radius:18px;background:var(--pri-soft);border:1px solid var(--bd)}.tutorhead b{display:block;font-size:17px}
.clog{max-height:52vh;overflow:auto;padding:2px}.clog .msg.a{background:var(--s1);border:1px solid var(--bd)}.sugs{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none}.sugs .chip{flex:none;white-space:nowrap}
.cform{display:flex;gap:8px;align-items:center}.cform input{margin:0}
.plantop{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}.cdbig{display:flex;align-items:baseline;gap:10px;padding:14px 16px;border-radius:18px;background:var(--accent);color:#fff}.cdbig b{font-size:34px}
.tasks{list-style:none;padding:0;margin:0;display:grid;gap:8px}.tasks li{display:flex;gap:10px;align-items:center}
.weeks{display:grid;gap:6px;margin-top:12px}.wk{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:14px;background:var(--s1);border:1px solid var(--bd);border-left:4px solid var(--c);cursor:pointer}
.wk input{width:20px;height:20px;accent-color:var(--pri);flex:none}.wd{width:54px;flex:none;color:var(--mu);font-size:13px;font-weight:700}.wn{flex:1;min-width:0}.wn em{font-style:normal;font-size:11px;font-weight:800;color:#fff;background:var(--pri);border-radius:999px;padding:1px 7px;margin-left:4px}
.wk.dn{opacity:.55}.wk.dn .wn{text-decoration:line-through}.wk.now{box-shadow:0 0 0 2px var(--pri)}
@media (min-width:1024px){.v-studio{max-width:1100px}.lgrid{grid-template-columns:repeat(2,1fr)}.weeks{grid-template-columns:repeat(3,1fr)}.notes{grid-template-columns:repeat(2,1fr)}.fc{height:300px}.clog{max-height:58vh}.shero{padding:20px 22px}}
.grades[hidden],.sprog[hidden]{display:none!important}@media (max-width:430px){#tabs .nl{font-size:9px;letter-spacing:-.02em}#tabs button svg{width:21px;height:21px}}
/* ===== v16: What's new (guideline updates) ===== */
.wn{border-color:color-mix(in srgb,var(--pri) 45%,var(--bd));background:var(--pri)}
.wnh{display:flex;align-items:center;justify-content:space-between;gap:8px}.wnh h3{margin:0}
.wnbadge{background:var(--pri);color:#fff;font-size:12px;font-weight:800;padding:3px 9px;border-radius:999px;white-space:nowrap}
.wnsub{margin:4px 0 8px;font-size:13px}
.wnrow{display:flex;align-items:center;gap:10px;width:100%;min-height:52px;padding:9px 10px;margin:6px 0;border:1px solid var(--bd);border-radius:14px;background:var(--s1);color:var(--tx);text-align:left;cursor:pointer;font:inherit}
.wnrow:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--pri) 60%,var(--bd))}
.wndate{flex:0 0 auto;font-size:11.5px;font-weight:800;color:var(--pri);background:color-mix(in srgb,var(--pri) 18%,transparent);padding:3px 8px;border-radius:999px;white-space:nowrap}
html:not([data-theme=light]) .wndate{color:var(--pri)}
.wnt{display:flex;flex-direction:column;min-width:0;flex:1;word-break:normal;overflow-wrap:break-word}.wnt b{font-size:14px;line-height:1.3}.wnt small{color:var(--mu);font-size:12px;margin-top:2px}
.wnarr{font-size:20px;color:var(--mu)}.wnall{margin-top:4px}
.upd h3{margin:8px 0 2px;line-height:1.3}.updtop{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.updkind{font-size:11.5px;font-weight:700;color:var(--mu);border:1px solid var(--bd);padding:2px 8px;border-radius:999px}
.updorg{font-size:12.5px;margin-bottom:6px}.updpts{padding-left:20px;margin:8px 0}.updpts li{margin:6px 0;line-height:1.45;word-break:normal;overflow-wrap:break-word}
.upd table caption{caption-side:top;text-align:left;font-weight:700;padding:8px 10px;font-size:13px}
.upd table td{white-space:normal}
.updsrc,.csrc{font-size:12.5px;color:var(--mu);margin:8px 0;word-break:normal;overflow-wrap:anywhere}
.updsrc a,.csrc a{font-weight:700}
.upd.flash{animation:fin .5s var(--ease);box-shadow:0 0 0 2px color-mix(in srgb,var(--pri) 70%,transparent),var(--sh2)}
.updlink{--c:var(--pri)}
.hcol>.card:first-child{margin-top:0}