:root{
  --ink:#16233B; --text:#27303F; --muted:#637083; --line:#DDE3EC; --bg:#F4F6FB; --surface:#FFFFFF;
  --blue:#2B59FF; --blue-soft:#E9EEFF; --yellow:#FFD93B; --yellow-soft:#FFF5C7; --yellow-deep:#E0B400;
  --coral:#FF6B57; --coral-soft:#FFE6E1; --mint:#19B88A; --mint-soft:#DDF6EC; --violet:#7A5AF8; --violet-soft:#ECE7FF;
  --amber:#B45309; --amber-soft:#FDEFD3; --green:#157A55; --red:#B42318; --red-soft:#FBE7E4;
  --r-sm:8px; --r:14px; --r-lg:22px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:var(--sans);color:var(--text);background:var(--bg);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3{color:var(--ink);letter-spacing:-.025em;line-height:1.12}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums}
.muted{color:var(--muted)} .small{font-size:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:2px solid var(--ink);background:var(--surface);padding:10px 18px;border-radius:99px;font-weight:700;font-size:15px;color:var(--ink);text-decoration:none;transition:transform .12s,box-shadow .12s;box-shadow:0 3px 0 var(--ink)}
.btn:hover{text-decoration:none;transform:translateY(-1px);box-shadow:0 4px 0 var(--ink)}
.btn:active{transform:translateY(3px);box-shadow:0 0 0 var(--ink)}
.btn.primary{background:var(--yellow)}
.btn.dark{background:var(--ink);color:#fff}
.btn.blue{background:var(--blue);color:#fff}
.btn.plain{border-color:var(--line);box-shadow:none;font-weight:600}
.btn.plain:hover{transform:none;border-color:#B8C2D2;box-shadow:none}
.btn.sm{padding:7px 14px;font-size:14px}
.tag{display:inline-block;font-size:12.5px;font-weight:700;padding:2px 9px;border-radius:99px;background:var(--blue-soft);color:var(--blue);white-space:nowrap}
.tag.amber{background:var(--amber-soft);color:var(--amber)}
.tag.sn{background:var(--yellow);color:#3D3000}
.tag.grey{background:#EAEEF4;color:var(--muted)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.sid{display:inline-block;flex:none;transform:rotate(-6deg)}
.sid .eye{animation:blink 5.5s infinite;transform-origin:center;transform-box:fill-box}
@keyframes blink{0%,94%,100%{transform:scaleY(1)}97%{transform:scaleY(.1)}}

/* ---------- public ---------- */
.pub{background:#fff}
.dots{background-image:radial-gradient(#D5DCE8 1.2px,transparent 1.2px);background-size:22px 22px}
.pub-nav{display:flex;align-items:center;gap:22px;max-width:1140px;margin:0 auto;padding:18px 24px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:21px;color:var(--ink);letter-spacing:-.035em}
.logo:hover{text-decoration:none}
.logo:hover .sid{transform:rotate(6deg);transition:transform .2s}
.pub-nav .sp{flex:1}
.pub-nav a.l{color:var(--text);font-size:15px;font-weight:600}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
.hero{display:grid;grid-template-columns:1fr 1.05fr;gap:40px;align-items:center;padding:36px 0 64px}
.hero h1{font-size:clamp(38px,5.2vw,62px);font-weight:820;letter-spacing:-.04em}
.hero .lead{font-size:19px;color:var(--muted);margin:20px 0 28px;max-width:32em}
.cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.niche{margin-top:22px;display:flex;gap:10px;align-items:center;font-size:14.5px;color:var(--muted)}
.stage{position:relative;height:440px}
.slide{position:absolute;left:14%;top:70px;width:64%;aspect-ratio:16/10;background:#fff;border:2px solid var(--ink);border-radius:12px;padding:22px 24px;box-shadow:8px 8px 0 var(--blue-soft)}
.slide h4{font-size:19px;color:var(--ink);margin:0 0 14px}
.slide li{color:#8A95A6;font-size:14px;margin-bottom:7px}
.slide ul{margin:0;padding-left:18px}
.slide .pg{position:absolute;right:16px;bottom:10px;font-size:12px;color:#9AA4B4}
.rec{position:absolute;left:14%;top:22px;display:flex;gap:8px;align-items:center;background:var(--ink);color:#fff;padding:6px 14px;border-radius:99px;font-size:13.5px;font-weight:700}
.rec i{width:9px;height:9px;border-radius:50%;background:var(--coral);animation:pulse 1.4s infinite}
@keyframes pulse{50%{opacity:.25}}
.sticky-w{position:absolute;width:212px;filter:drop-shadow(0 8px 10px rgba(22,35,59,.16));transform:rotate(var(--rot));animation:pop .5s cubic-bezier(.2,1.4,.4,1) both;animation-delay:var(--d)}
.sticky{background:var(--c);padding:12px 14px 16px;font-size:13.5px;line-height:1.4;color:var(--ink);clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%)}
.sticky b{display:block;font-size:12.5px;margin-bottom:3px;opacity:.7}
@keyframes pop{from{opacity:0;transform:rotate(var(--rot)) scale(.5) translateY(14px)}to{opacity:1;transform:rotate(var(--rot)) scale(1)}}
.said{padding:64px 0;background:var(--ink);color:#fff}
.said h2{color:#fff;font-size:32px;max-width:20em}
.said p{color:#B5C0D4;margin-top:10px;max-width:38em}
.cloud{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.bub{padding:10px 16px;border-radius:18px 18px 18px 4px;background:#253655;color:#D5DDEB;font-size:15.5px}
.bub.flag{background:var(--yellow);color:#2B2300;font-weight:700}
.bub.flag::after{content:" caught";font-size:12px;font-weight:800;background:var(--ink);color:var(--yellow);padding:2px 8px;border-radius:99px;margin-left:8px}
.sect{padding:72px 0}
.sect h2{font-size:34px;max-width:18em}
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;margin-top:32px}
.bx{border-radius:var(--r-lg);padding:24px;min-height:210px;display:flex;flex-direction:column;gap:8px;border:2px solid var(--ink)}
.bx h3{font-size:20px}
.bx p{font-size:15px;color:#3B4658}
.bx .art{margin-top:auto;padding-top:14px}
.b1{grid-column:span 4;background:var(--yellow-soft)} .b2{grid-column:span 2;background:var(--blue-soft)}
.b3{grid-column:span 2;background:var(--coral-soft)} .b4{grid-column:span 2;background:var(--mint-soft)} .b5{grid-column:span 2;background:var(--violet-soft)}
.b6{grid-column:span 6;background:#fff;flex-direction:row;align-items:center;gap:28px;min-height:0}
.mini{background:#fff;border:1.5px solid var(--ink);border-radius:10px;padding:10px 12px;font-size:13.5px;color:var(--ink)}
.chat{display:grid;gap:6px;max-width:320px;flex:none}
.chat .m{background:#EEF1F6;border-radius:14px 14px 14px 4px;padding:8px 12px;font-size:14px;width:fit-content}
.chat .m.me{background:var(--blue);color:#fff;border-radius:14px 14px 4px 14px;margin-left:auto}
.ways{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
.ways .card{padding:22px;border-width:2px;border-color:var(--ink);border-radius:var(--r-lg)}
.ways svg{margin-bottom:10px}
.end{background:var(--yellow);padding:56px 0;text-align:center}
.end h2{font-size:36px;margin:14px auto 22px;max-width:16em}
footer.f{padding:26px 0 44px;color:var(--muted);font-size:14px;background:#fff}

/* ---------- app shell ---------- */
.shell{display:grid;grid-template-columns:256px 1fr;min-height:100vh}
.side{background:#fff;border-right:1px solid var(--line);padding:20px 14px;display:flex;flex-direction:column;gap:4px;position:sticky;top:0;height:100vh}
.side .logo{padding:2px 8px 16px}
.side .new{margin:4px 4px 14px}
.side a.n{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--r-sm);color:var(--text);font-size:15px;font-weight:600}
.side a.n:hover{background:var(--bg);text-decoration:none}
.side a.n.on{background:var(--ink);color:#fff}
.side a.n .ct{margin-left:auto;font-weight:500;opacity:.7}
.cdot{width:11px;height:11px;border-radius:4px;flex:none}
.side .lbl{font-size:13px;color:var(--muted);padding:16px 10px 6px}
.streak{margin-top:auto;background:var(--yellow-soft);border-radius:var(--r);padding:14px}
.streak b{color:var(--ink)}
.days{display:flex;gap:6px;margin-top:10px}
.days span{flex:1;text-align:center;font-size:11.5px;font-weight:700;padding:5px 0;border-radius:6px;background:#fff;color:var(--muted)}
.days span.d{background:var(--ink);color:var(--yellow)}
.main{padding:32px 40px 80px;min-width:0}
.main>.inner{max-width:1000px}
.crumb{font-size:14px;color:var(--muted);margin-bottom:8px}
.page-h{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.page-h h1{font-size:32px;font-weight:800}
.hello{display:flex;gap:14px;align-items:center}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:20px}
.stat{padding:16px 18px;border-radius:var(--r);display:flex;flex-direction:column}
.stat b{font-size:30px;color:var(--ink);line-height:1.1;font-weight:800}
.stat span{font-size:14px;color:#3B4658}
.grid2{display:grid;grid-template-columns:1.25fr 1fr;gap:20px;align-items:start}
.list{list-style:none;margin:0;padding:0}
.list li{display:flex;gap:14px;align-items:center;padding:13px 18px;border-top:1px solid var(--line)}
.list li:first-child{border-top:0}
.grow{flex:1;min-width:0}
.list .t{font-weight:700;color:var(--ink)}
.sec-h{font-size:17px;padding:16px 18px 4px}
.count{flex:none;width:58px;height:58px;border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.05;background:var(--amber-soft);color:var(--amber)}
.count b{font-size:22px;font-weight:800}
.count span{font-size:11.5px;font-weight:700}
.courses{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin-top:12px}
.courses a{display:block;color:inherit;overflow:hidden;border-radius:var(--r);border:1px solid var(--line);background:#fff;transition:transform .12s}
.courses a:hover{text-decoration:none;transform:translateY(-3px)}
.courses .top{height:64px;padding:14px 16px;color:#fff;font-weight:800;font-size:19px;letter-spacing:-.02em}
.courses .bot{padding:12px 16px 14px}

/* ---------- lecture ---------- */
.tl{position:relative;height:46px;margin:6px 0 4px}
.tl .track{position:absolute;left:0;right:0;top:17px;height:14px;border-radius:9px;background:#E3E8F0;overflow:hidden;display:flex}
.tl .seg{height:100%;border:0;border-right:2px solid var(--bg);padding:0;cursor:pointer;opacity:.45}
.tl .seg:hover,.tl .seg.on{opacity:1}
.tl .mk{position:absolute;top:2px;width:20px;height:20px;margin-left:-10px;border:0;background:none;padding:0}
.tl .mk::before{content:"!";position:absolute;inset:0;border-radius:50%;background:var(--yellow);border:2px solid var(--ink);font-size:12px;font-weight:800;line-height:16px;color:var(--ink);text-align:center}
.tl .head{position:absolute;top:12px;width:5px;height:24px;margin-left:-2px;background:var(--ink);border-radius:3px;transition:left .25s}
.tl-ends{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted)}
.tabs{display:flex;gap:6px;margin:22px 0 20px;overflow-x:auto;padding-bottom:2px}
.tabs button{border:2px solid transparent;background:#E7EBF2;padding:8px 16px;font-weight:700;color:var(--muted);border-radius:99px;white-space:nowrap}
.tabs button.on{color:#fff;background:var(--ink)}
.alert{display:flex;gap:12px;align-items:flex-start;padding:12px 16px;background:var(--amber-soft);border-radius:var(--r-sm);margin-bottom:8px;font-size:15px}
.alert .ts{margin-left:auto}
.ts{border:0;background:none;padding:0;color:var(--blue);font-weight:700;font-size:13.5px;font-variant-numeric:tabular-nums;white-space:nowrap}
.ts:hover{text-decoration:underline}
.nsec{padding:20px 22px;margin-bottom:14px}
.nsec h3{font-size:19px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.pt{display:grid;grid-template-columns:52px 1fr;gap:10px;padding:10px 0;border-top:1px solid var(--line);margin-top:10px;align-items:start}
.pt.off .body{background:var(--yellow-soft);padding:9px 12px 12px;transform:rotate(-.4deg);clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%)}
.pt .zh{color:var(--muted);font-size:14.5px;margin-top:4px}
.pt.found{background:var(--blue-soft);box-shadow:-10px 0 0 var(--blue-soft),10px 0 0 var(--blue-soft)}   /* the point a search result opened */
.tools{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-bottom:16px;font-size:14.5px;font-weight:600}
.tools label{display:flex;gap:7px;align-items:center;cursor:pointer}
.seg-line{display:grid;grid-template-columns:52px 1fr;gap:10px;padding:9px 10px;border-radius:var(--r-sm)}
.seg-line.hit{background:var(--yellow-soft)}
.fc{max-width:560px;margin:0 auto;text-align:center;perspective:1200px}
.flip{position:relative;width:100%;height:250px;border:0;background:none;padding:0;transform-style:preserve-3d;transition:transform .45s}
.flip.on{transform:rotateY(180deg)}
.flip .f{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:32px;border-radius:var(--r-lg);border:2px solid var(--ink);backface-visibility:hidden;-webkit-backface-visibility:hidden;font-size:21px;font-weight:700;color:var(--ink);line-height:1.35;background:#fff;box-shadow:6px 6px 0 var(--violet-soft)}
.flip .f.b{transform:rotateY(180deg);background:var(--violet-soft);font-weight:600;font-size:18px;box-shadow:6px 6px 0 #fff}
.fc .ctl{display:flex;gap:10px;justify-content:center;margin-top:20px;flex-wrap:wrap}
.pips{display:flex;gap:5px;justify-content:center;margin-bottom:14px}
.pips i{width:26px;height:6px;border-radius:9px;background:#DCE2EC}
.pips i.k{background:var(--mint)} .pips i.c{background:var(--ink)}
.qz{max-width:640px;margin:0 auto}
.qz .opt{display:block;width:100%;text-align:left;padding:13px 16px;margin-top:10px;border:2px solid var(--line);border-radius:var(--r);background:var(--surface);font-weight:600}
.qz .opt:hover:not(:disabled){border-color:var(--ink)}
.qz .opt.ok{background:var(--mint-soft);border-color:var(--mint);color:var(--green)}
.qz .opt.no{background:var(--red-soft);border-color:var(--red);color:var(--red)}
.qz .why{margin-top:14px;padding:12px 16px;background:#EEF1F6;border-radius:var(--r-sm);font-size:15px;display:flex;gap:12px;align-items:flex-start}
.result{position:relative;overflow:hidden;padding:36px 28px;text-align:center;border-radius:var(--r-lg);border:2px solid var(--ink)}
.conf{position:absolute;top:-12px;width:9px;height:14px;animation:fall 1.8s ease-in forwards}
@keyframes fall{to{transform:translateY(340px) rotate(540deg);opacity:0}}
.shared-bar{background:var(--yellow);color:var(--ink);padding:9px 0;font-size:14.5px;font-weight:600}
.shared-bar .wrap{display:flex;gap:10px;align-items:center}
.sticky-cta{position:sticky;bottom:0;background:#fff;border-top:2px solid var(--ink);padding:14px 0;margin-top:40px}
.sticky-cta .wrap{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap}

/* ---------- new / live ---------- */
.choice{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:18px 0}
.choice button{padding:18px;text-align:left;border:2px solid var(--line);background:var(--surface);border-radius:var(--r)}
.choice button.on{border-color:var(--ink);box-shadow:4px 4px 0 var(--yellow)}
.choice b{display:block;color:var(--ink);margin-bottom:4px}
.field{display:block;margin-bottom:16px}
.field>span{display:block;font-size:14px;font-weight:700;color:var(--ink);margin-bottom:6px}
.field input,.field select{width:100%;font:inherit;padding:10px 12px;border:1.5px solid var(--line);border-radius:var(--r-sm);background:var(--surface);color:var(--text)}
.drop{border:2px dashed #B8C2D2;border-radius:var(--r);padding:24px;text-align:center;color:var(--muted);background:var(--surface)}
.live-top{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.dot{width:14px;height:14px;border-radius:50%;background:var(--coral);animation:pulse 1.4s infinite}
.paused .dot{animation:none;background:var(--muted)}
.clock{font-size:44px;font-weight:820;color:var(--ink);letter-spacing:-.03em}
.live-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;margin-top:20px;align-items:start}
.stream{padding:8px 12px;min-height:320px;max-height:460px;overflow:auto}
.catch{padding:20px;background:var(--yellow-soft);border:2px solid var(--ink);border-radius:var(--r-lg)}
.note-demo{font-size:13px;color:var(--muted);margin-top:10px}

.modal{position:fixed;inset:0;background:rgba(22,35,59,.5);display:flex;align-items:center;justify-content:center;padding:20px;z-index:20}
.modal .box{background:var(--surface);border-radius:var(--r-lg);border:2px solid var(--ink);padding:26px;max-width:480px;width:100%}
.modal h3{font-size:22px;margin-bottom:8px}
.copy{display:flex;gap:8px;margin:16px 0}
.copy input{flex:1;font:inherit;font-size:14.5px;padding:9px 12px;border:1.5px solid var(--line);border-radius:var(--r-sm);background:var(--bg);min-width:0}
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:99px;font-size:14.5px;font-weight:600;z-index:30}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;padding-top:12px}
  .stage{height:auto;padding-top:56px}
  .slide{position:relative;left:0;top:0;width:100%}
  .rec{left:0;top:8px}
  .sticky-w{position:relative;left:auto!important;right:auto!important;top:auto!important;bottom:auto!important;width:86%;margin:12px 0 0 auto}
  .sticky-w:nth-of-type(odd){margin-left:0}
  .bento{grid-template-columns:1fr}.bx{grid-column:auto!important}.b6{flex-direction:column;align-items:flex-start}
  .ways,.choice,.grid2,.live-grid,.stats{grid-template-columns:1fr}
  .pub-nav a.l{display:none}
  .tl-ends span:nth-child(2){display:none}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ---------- additions: auth, states, slides view, recording ---------- */
button:disabled{opacity:.55;cursor:not-allowed}
.btn{white-space:nowrap}
.center{min-height:70vh;display:flex;align-items:center;justify-content:center;padding:24px}
.auth{max-width:430px;width:100%;padding:28px;border:2px solid var(--ink);border-radius:var(--r-lg);background:#fff;box-shadow:8px 8px 0 var(--yellow)}
.err{color:var(--red);font-size:14.5px;font-weight:600;margin:-4px 0 14px}
.pill-rec{display:inline-flex;gap:8px;align-items:center;background:var(--ink);color:#fff;padding:7px 16px;border-radius:99px;font-weight:700;font-size:14px;margin-bottom:16px}
.pill-rec:hover{text-decoration:none}
.pill-rec i{width:9px;height:9px;border-radius:50%;background:var(--coral);animation:pulse 1.4s infinite}
.lvl{width:130px;height:7px;border-radius:9px;background:#E3E8F0;overflow:hidden;margin-top:5px}
.lvl b{display:block;height:100%;width:0;background:var(--mint);transition:width .1s}
.ubar{height:10px;border-radius:9px;background:#E3E8F0;overflow:hidden}
.ubar b{display:block;height:100%;background:var(--ink)}
.srow{display:grid;grid-template-columns:200px 1fr;gap:20px;padding:18px 0;border-top:1px solid var(--line);align-items:start}
.srow:first-child{border-top:0}
.srow .pt:first-child{border-top:0;margin-top:0;padding-top:0}
.thumb{aspect-ratio:16/10;border:2px solid var(--ink);border-radius:10px;background:#fff;padding:12px;display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);box-shadow:4px 4px 0 var(--blue-soft);overflow:hidden}
.thumb b{color:var(--ink);font-size:14.5px;line-height:1.25}
.thumb img{width:calc(100% + 24px);height:calc(100% + 24px);margin:-12px;object-fit:cover}
.sk{height:16px;border-radius:8px;background:linear-gradient(90deg,#E7EBF2,#F4F6FB,#E7EBF2);background-size:200% 100%;animation:sk 1.2s infinite;margin-bottom:12px}
@keyframes sk{to{background-position:-200% 0}}
.mock-pill{position:fixed;left:12px;bottom:12px;background:#fff;border:1.5px solid var(--ink);border-radius:99px;padding:3px 11px;font-size:12px;font-weight:700;z-index:15;color:var(--ink)}
.hits{border-top:1px solid var(--line)}   /* "Found in the notes" on the home page */
.hits h3{font-size:13.5px;color:var(--muted);padding:12px 18px 0}
.hits .list li{align-items:flex-start}
.hits .snip{color:var(--ink);display:block}
.hits mark{background:var(--yellow-soft);color:inherit;border-radius:3px;padding:0 1px}
.hits-note{padding:10px 18px 14px;border-top:1px solid var(--line);margin:0}
.search{font:inherit;font-size:14.5px;padding:7px 14px;border:1.5px solid var(--line);border-radius:99px;min-width:230px;background:#fff;color:var(--text)}
.filechip{display:flex;gap:10px;align-items:center;justify-content:space-between;padding:11px 14px;border:1.5px solid var(--ink);border-radius:var(--r-sm);background:var(--yellow-soft);font-size:14.5px}
.side button.n{display:flex;align-items:center;gap:10px;padding:9px 10px;border:0;background:none;border-radius:var(--r-sm);color:var(--muted);font-size:14.5px;font-weight:600;text-align:left}
.side button.n:hover{background:var(--bg)}
.addcard{border:2px dashed #B8C2D2;border-radius:var(--r);background:none;font-weight:700;color:var(--muted);min-height:118px}
.addcard:hover{border-color:var(--ink);color:var(--ink)}
@media (max-width:900px){.sticky-cta span{display:none}.sticky-cta .btn{width:100%}.srow{grid-template-columns:1fr}.thumb{max-width:240px}.search{min-width:0;width:100%}}

/* ---------- additions: editing, language, plans, review pack, print ---------- */
html[lang=zh-Hant] .bub.flag::after{content:" 已記下"}
html[lang=zh-Hant] .hero h1{letter-spacing:-.01em;line-height:1.25;font-size:clamp(30px,3.9vw,46px)}
.field textarea{width:100%;font:inherit;padding:10px 12px;border:1.5px solid var(--line);border-radius:var(--r-sm);background:var(--surface);color:var(--text);resize:vertical}
.pt-acts{display:flex;gap:14px;margin-top:6px}
.lang{border:1.5px solid var(--line);background:#fff;border-radius:99px;padding:4px 11px;font-size:13px;font-weight:700;color:var(--ink)}
.lang:hover{border-color:var(--ink)}
.choice{grid-template-columns:repeat(2,1fr)}
.offline-bar{display:none;position:fixed;top:0;left:0;right:0;z-index:40;background:var(--ink);color:#fff;text-align:center;font-size:14px;font-weight:600;padding:6px 12px}
body.is-offline .offline-bar{display:block}
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-top:16px}
.plan{border:2px solid var(--line);border-radius:var(--r);padding:16px;display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.plan.cur{border-color:var(--ink);box-shadow:4px 4px 0 var(--yellow)}
.plan b{color:var(--ink);font-size:17px}
.plan .price{font-size:20px;font-weight:800;color:var(--ink)}
.plan ul{margin:0;padding-left:18px;font-size:14px;flex:1}
.pk h2{font-size:21px;margin:26px 0 12px}
.pk details{border-top:1px solid var(--line);padding:12px 0}
.pk details:first-child{border-top:0}
.pk summary{cursor:pointer;font-weight:700;color:var(--ink)}
.pk ol{margin:8px 0 0;padding-left:24px}
.keys{font-size:13px;color:var(--muted);margin-top:14px}
@media (max-width:900px){.choice{grid-template-columns:1fr}.keys{display:none}}
@media print{
  .side,.tabs,.tools,.tl,.tl-ends,.mock-pill,.btn,.toast,.pill-rec,.crumb,.sticky-cta,.shared-bar,.pub-nav,.pt-acts,.offline-bar,#overlay,.noprint{display:none!important}
  .shell{display:block}.main{padding:0}body,.pub{background:#fff!important}
  .card,.nsec,.alert{break-inside:avoid}
  .pt.found{background:none;box-shadow:none}
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .pk details>*{display:block}
}

/* ---------- recording playback ---------- */
.player{position:sticky;bottom:16px;z-index:6;margin-top:26px;display:grid;grid-template-columns:auto auto 1fr auto auto auto;align-items:center;gap:0 10px;padding:7px 12px 7px 7px;background:#fff;border:2px solid var(--ink);border-radius:99px;box-shadow:0 4px 0 var(--ink)}
.player .pp{width:44px;height:44px;border-radius:50%;border:2px solid var(--ink);background:var(--yellow);display:grid;place-items:center;padding:0;color:var(--ink)}
.player .ptime{font-size:14px;color:var(--muted);font-weight:600;white-space:nowrap}
.player .ptime b{color:var(--ink);font-weight:800}
.player .pb{border:0;background:none;padding:0 6px;border-radius:99px;font-weight:700;font-size:13.5px;color:var(--ink);min-width:42px;height:36px}
.player .pb:hover{background:var(--bg)}
.player .pb.rate{background:#EAEEF4}
.pbar{-webkit-appearance:none;appearance:none;width:100%;min-width:0;height:28px;margin:0;padding:0;background:none;cursor:pointer;--p:0%}
.pbar::-webkit-slider-runnable-track{height:8px;border-radius:9px;background:linear-gradient(to right,var(--ink) var(--p),#E3E8F0 var(--p))}
.pbar::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;margin-top:-5px;border-radius:50%;background:var(--yellow);border:2px solid var(--ink)}
.pbar::-moz-range-track{height:8px;border-radius:9px;background:#E3E8F0}
.pbar::-moz-range-progress{height:8px;border-radius:9px;background:var(--ink)}
.pbar::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--yellow);border:2px solid var(--ink)}
.player.off{display:block;border-radius:var(--r);padding:12px 16px;font-size:14.5px;font-weight:600;box-shadow:none}
.pub .player{bottom:92px}
.tag.red{background:var(--red-soft);color:var(--red)}
.seg-line{align-items:start}
.qz .opt:disabled{opacity:1;cursor:default}
.qz .opt:disabled:not(.ok):not(.no){color:var(--muted)}
.live-top{position:relative}
.live-actions{display:flex;gap:14px;flex-wrap:wrap}
.choice .n,.discard-m{display:none}

/* ---------- phones and small tablets: top bar, bottom navigation, thumb-reach actions ---------- */
.mtop,.mnav{display:none}
@media (max-width:900px){
  .shell{display:block}
  .side,.desk,.pill-rec{display:none}
  .mtop{display:flex;align-items:center;gap:10px;background:#fff;border-bottom:1px solid var(--line);padding:calc(6px + env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) 6px max(16px,env(safe-area-inset-left))}
  .mtop .logo{font-size:19px}
  .mtop .sp{flex:1}
  .mtop .ico{width:44px;height:44px;margin-right:-8px;display:grid;place-items:center;border-radius:50%;color:var(--ink)}
  .mtop .ico.on{background:var(--ink);color:#fff}
  .mtag{font-size:11.5px;font-weight:700;border:1.5px solid var(--ink);border-radius:99px;padding:1px 9px;color:var(--ink);white-space:nowrap}
  .main{padding:18px max(16px,env(safe-area-inset-right)) calc(108px + env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}
  .mnav{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;position:fixed;left:0;right:0;bottom:0;z-index:12;background:#fff;border-top:2px solid var(--ink);padding:6px 10px calc(6px + env(safe-area-inset-bottom))}
  .mnav a.t{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;min-height:52px;font-size:11.5px;font-weight:700;color:var(--muted)}
  .mnav a.t:hover{text-decoration:none}
  .mnav a.t.on{color:var(--ink)}
  .mnav .go{margin:0 6px 3px}
  .shell~.mock-pill{display:none}
  .shared-bar~.mock-pill{bottom:calc(84px + env(safe-area-inset-bottom))}
  .btn{min-height:44px}
  .btn.sm{min-height:38px}
  .page-h{margin-bottom:16px}
  .page-h h1{font-size:26px}
  .hello{gap:12px}
  .hello>svg{width:44px;height:44px}
  .stats{grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:16px}
  .stat{padding:12px}
  .stat b{font-size:24px}
  .stat span{font-size:12.5px;line-height:1.3;margin-top:2px}
  .list li{padding:13px 14px;gap:12px}
  .hits h3,.hits-note{padding-left:14px;padding-right:14px}
  .sec-h{padding:14px 14px 4px}
  .courses{grid-template-columns:1fr 1fr;gap:10px}
  .courses .top{height:52px;padding:13px 12px;font-size:16px}
  .courses .bot{padding:10px 12px 12px}
  .addcard{min-height:104px}
  .search,.field input,.field select,.copy input{font-size:16px} /* iOS zooms the page when a field under 16px is focused */
  .tl{height:58px}
  .tl .track{top:24px;height:18px}
  .tl .mk{top:2px;width:32px;height:32px;margin-left:-16px}
  .tl .mk::before{inset:6px}
  .tl .head{top:18px;height:30px}
  .tabs{position:sticky;top:0;z-index:7;background:var(--bg);margin:10px -16px 12px;padding:8px 16px;scrollbar-width:none}
  .tabs::-webkit-scrollbar{display:none}
  .tabs button{min-height:40px}
  .ts{position:relative}
  .ts::after{content:"";position:absolute;inset:-9px -8px} /* larger tap area, same look */
  .pt{grid-template-columns:48px 1fr;gap:8px}
  .nsec{padding:16px 14px}
  .alert{padding:11px 12px;gap:10px}
  .tools{gap:10px 18px}
  .main input[type=checkbox]{width:18px;height:18px;flex:none}
  .srow{gap:10px;padding:14px 0}
  .thumb{max-width:none}
  .thumb.noimg{aspect-ratio:auto;flex-direction:row;align-items:baseline;gap:8px;padding:8px 12px;box-shadow:none;border-width:1.5px}
  .flip{height:230px}
  .flip .f{font-size:19px;padding:24px}
  .flip .f.b{font-size:16.5px}
  .fc .ctl{gap:8px}
  .fc .ctl .btn{flex:1;padding-left:8px;padding-right:8px}
  .player{bottom:calc(72px + env(safe-area-inset-bottom));grid-template-columns:auto 1fr auto auto auto;grid-template-areas:"bar bar bar bar bar" "pp time back fwd rate";gap:0 6px;border-radius:20px;padding:2px 10px 8px;box-shadow:0 3px 0 var(--ink)}
  .player .pbar{grid-area:bar}
  .player .pp{grid-area:pp;width:40px;height:40px}
  .player .ptime{grid-area:time;padding-left:4px}
  .player .back{grid-area:back}
  .player .fwd{grid-area:fwd}
  .player .rate{grid-area:rate}
  .player .pb{height:40px;min-width:46px}
  .pub .player{bottom:calc(86px + env(safe-area-inset-bottom))}
  .choice{grid-template-columns:repeat(3,1fr);gap:8px;margin:14px 0}
  .choice button{padding:13px 6px;text-align:center}
  .choice b{margin:0}
  .choice .w,.choice .d{display:none}
  .choice .n{display:inline}
  .main form.card{padding:16px}
  .main form .btn.blue{width:100%;min-height:50px}
  .live-top{gap:8px 12px}
  .clock{font-size:42px}
  .discard-m{display:inline;position:absolute;right:0;top:-31px;color:var(--muted)}
  .live-actions{position:fixed;left:0;right:0;bottom:0;z-index:12;flex-wrap:nowrap;gap:8px;background:#fff;border-top:2px solid var(--ink);padding:10px max(12px,env(safe-area-inset-right)) calc(10px + env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left))}
  .live-actions .discard{display:none}
  .live-actions .btn{min-height:50px}
  .live-actions .btn.dark{flex:1}
  .live-grid{margin-top:14px;gap:14px}
  .stream{min-height:180px;max-height:44vh}
  .catch{order:-1;display:grid;grid-template-columns:1fr auto;align-items:center;gap:10px 12px;padding:14px}
  .catch>p{display:none}
  .catch>.btn{grid-column:2;grid-row:1}
  .catch .recap{grid-column:1/-1;margin-top:2px!important}
  .modal{align-items:flex-end;padding:0}
  .modal .box{max-width:none;max-height:88vh;overflow:auto;border-width:2px 0 0;border-radius:22px 22px 0 0;padding:22px 18px calc(22px + env(safe-area-inset-bottom))}
  .toast{top:calc(10px + env(safe-area-inset-top));bottom:auto;width:max-content;max-width:calc(100% - 32px);text-align:center;border-radius:18px}
}

/* ---------- the new design's additions on phones and in print ---------- */
@media (max-width:900px){
  .choice{grid-template-columns:repeat(auto-fit,minmax(74px,1fr))}
  .pub-nav{gap:10px;flex-wrap:wrap}
  body.is-offline .toast{top:calc(44px + env(safe-area-inset-top))}
  .pk h2{font-size:19px;margin-top:22px}
  .pk .alert{flex-wrap:wrap}
  .pk .alert>span:last-child{margin-left:0!important;white-space:normal!important}
}
@media print{.mtop,.mnav,.player,.live-actions{display:none!important}.main{padding:0!important}}

/* ---------- 繁 / 简 switch next to 中文解釋 ---------- */
.seg2{display:inline-flex;margin-left:-8px;border:1.5px solid var(--line);border-radius:99px;overflow:hidden;background:#fff}
.seg2 button{border:0;background:none;padding:2px 11px;font-size:13.5px;font-weight:700;color:var(--muted)}
.seg2 button.on{background:var(--ink);color:#fff}
@media (max-width:900px){.seg2 button{padding:6px 14px}}
@media print{.seg2{display:none!important}}