:root{--bg: #141416;--bg1: #1c1c20;--bg2: #26262c;--bg3: #303038;--border: #2e2e36;--text: #f4f4f6;--muted: #a3a3ad;--faint: #6e6e78;--accent: #7e6cf5;--accent-2: #9a8bff;--accent-soft: rgba(126, 108, 245, .16);--on-accent: #ffffff;--gold: #ffce5c;--ok: #5fcf9e;--danger: #ff6b81;--card-shadow: 0 1px 0 rgba(255, 255, 255, .03);--lift-shadow: 0 18px 40px rgba(0, 0, 0, .4);--radius: 14px;--radius-sm: 11px;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--nav-h: 62px;--fbody: "Hanken Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--fdisp: "Space Grotesk", var(--fbody);--fmono: "Space Mono", ui-monospace, "SF Mono", 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14px;background:linear-gradient(180deg,#0009,#0000)}.ctrl-top .glass{width:40px;height:40px;flex-shrink:0;border-radius:11px;background:#ffffff14;border:1px solid rgba(255,255,255,.12);color:#fff;display:grid;place-items:center}.ctrl-top .glass:hover{background:#ffffff24}.ctrl-top .glass svg{width:20px;height:20px}.ctrl-top .titles{min-width:0;flex:1}.ctrl-top .titles .l1{font-family:var(--fmono);font-size:12px;color:#fff9;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ctrl-top .titles .l2{font-family:var(--fdisp);font-weight:600;font-size:18px;color:#fff;margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ctrl-top .top-actions{display:flex;align-items:center;gap:10px}.player-root button:focus{outline:none}.player-root button:focus-visible{outline:2px solid var(--accent-2);outline-offset:2px}.player-root .ctrl-tap,.player-root .ctrl-tap:focus,.player-root .ctrl-tap:focus-visible{outline:none}.ctrl-tap{flex:1;width:100%;background:none;border:none;display:grid;place-items:center;cursor:pointer}.ctrl-tap .tap-play{width:84px;height:84px;border-radius:50%;background:#0a0a0c8c;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.22);color:#fff;display:grid;place-items:center}.ctrl-tap .tap-play svg{width:38px;height:38px;margin-left:4px}.ctrl-bottom{padding:12px 22px calc(20px + var(--safe-bottom));background:linear-gradient(0deg,#000000a8,#0000)}.scrub-row{display:flex;align-items:center;gap:14px;margin-bottom:12px}.scrub-row .t{font-family:var(--fmono);font-size:12.5px;color:#ffffffc7;min-width:44px}.scrub-row .t.end{text-align:right}.seek{-webkit-appearance:none;-moz-appearance:none;appearance:none;flex:1;height:16px;background:transparent;cursor:pointer}.seek::-webkit-slider-runnable-track{height:5px;border-radius:4px;background:linear-gradient(to right,var(--accent) var(--p,0%),rgba(255,255,255,.2) var(--p,0%))}.seek::-moz-range-track{height:5px;border-radius:4px;background:#fff3}.seek::-moz-range-progress{height:5px;border-radius:4px;background:var(--accent)}.seek::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:#fff;margin-top:-4.5px;box-shadow:0 1px 6px #00000080}.seek::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:#fff;border:none}.ctrl-bar{display:flex;align-items:center;justify-content:space-between;gap:8px;overflow-x:auto;scrollbar-width:none}.ctrl-bar::-webkit-scrollbar{display:none}.ctrl-bar .grp{display:flex;align-items:center;flex:0 0 auto}.ctrl-bar .grp.left{gap:6px}.ctrl-bar .grp.right{gap:8px}.cbtn{width:40px;height:40px;flex-shrink:0;border-radius:11px;background:#ffffff14;border:1px solid rgba(255,255,255,.12);color:#fff;display:grid;place-items:center;position:relative}.cbtn:hover{background:#ffffff29}.cbtn:disabled{opacity:.34}.cbtn svg{width:22px;height:22px}.cbtn.skip{width:46px}.cbtn.skip svg{width:30px;height:30px;stroke-width:1.9}.cbtn.skip span{position:absolute;font-family:var(--fmono);font-size:9.5px;font-weight:700;top:55%;left:0;right:0;transform:translateY(-50%);text-align:center}.cbtn.active{color:var(--accent-2)}.cbtn.play{width:48px;height:48px;border-radius:50%;background:#fff;border:none;color:#111}.cbtn.play svg{width:24px;height:24px}.vol{display:flex;align-items:center;gap:9px}.vol .vbar{width:84px;height:5px;border-radius:4px;background:#ffffff38;-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer}.vol .vbar::-webkit-slider-runnable-track{height:5px;border-radius:4px;background:linear-gradient(to right,rgba(255,255,255,.85) var(--p,100%),rgba(255,255,255,.22) var(--p,100%))}.vol .vbar::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;border-radius:50%;background:#fff;margin-top:-3.5px}.vol .vbar::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:#fff;border:none}.rate-pill{padding:8px 12px;border-radius:9px;background:#ffffff14;border:1px solid rgba(255,255,255,.12);color:#fff;font-family:var(--fmono);font-size:13px;font-weight:700}.rate-pill:hover{background:#ffffff29}.pop{position:absolute;bottom:calc(78px + var(--safe-bottom));right:18px;z-index:8;background:#1c1c22f7;border:1px solid var(--border);border-radius:12px;padding:6px;min-width:156px;box-shadow:var(--lift-shadow)}.pop .pop-head{font-family:var(--fmono);font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--faint);padding:6px 12px}.pop .pop-item{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px;border-radius:8px;font-size:14px;color:#fff;background:none;border:none;width:100%;text-align:left}.pop .pop-item:hover{background:#ffffff14}.pop .pop-item.sel{color:var(--accent-2);font-weight:700}.center-toast{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:9;background:#0000009e;color:#fff;padding:10px 16px;border-radius:999px;font-family:var(--fmono);font-weight:700;font-size:14px;pointer-events:none;animation:fadeout .7s forwards}@keyframes fadeout{0%{opacity:1}70%{opacity:1}to{opacity:0}}.ldrawer-scrim{position:absolute;top:0;right:0;bottom:0;left:0;z-index:8;background:#0000006b}.ldrawer{position:absolute;top:0;right:0;bottom:0;z-index:9;width:min(392px,88vw);background:var(--bg1);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;box-shadow:-20px 0 50px #0006;animation:drawerIn .22s ease}@keyframes drawerIn{0%{transform:translate(102%)}to{transform:translate(0)}}.ldrawer .dh{padding:calc(20px + var(--safe-top)) 20px 16px;border-bottom:1px solid var(--border)}.ldrawer .dh .row{justify-content:space-between;align-items:flex-start}.ldrawer .dh .eyebrow{margin-bottom:4px}.ldrawer .dh .dt{font-family:var(--fdisp);font-weight:600;font-size:18px}.ldrawer .dh .close{width:34px;height:34px;flex-shrink:0;border-radius:9px;background:var(--bg2);border:1px solid var(--border);color:var(--muted);display:grid;place-items:center}.ldrawer .dlist{flex:1;overflow-y:auto;padding:10px}.ldrawer .dlist .lesson{padding:11px 12px}@media (max-width: 899px){.rail-art{max-width:230px}.course-rail h1{font-size:23px}}@media (max-width: 560px){.vol .vbar{display:none}.ctrl-bottom{padding-left:14px;padding-right:14px}.ctrl-bar .grp.left,.ctrl-bar .grp.right{gap:3px}.cbtn{width:37px;height:37px}.cbtn.skip{width:42px}.cbtn.skip svg{width:28px;height:28px}.cbtn.play{width:46px;height:46px}.rate-pill{padding:7px 9px}}@media (min-width: 900px){.bottom-nav,.topbar{display:none}.shell{padding-bottom:0;padding-left:244px}.side-nav{display:flex;flex-direction:column;position:fixed;inset:0 auto 0 0;width:244px;background:var(--bg);border-right:1px solid var(--border);padding:22px 14px;z-index:50}.side-nav .brand{padding:4px 8px 26px;font-size:20px}.side-nav .brand .mark{width:34px;height:34px;border-radius:9px}.side-nav .brand .mark svg{width:17px;height:17px}.side-nav nav{display:flex;flex-direction:column;gap:3px}.side-nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;color:var(--muted);font-weight:500;font-size:15px}.side-nav a:hover{background:var(--bg1);color:var(--text)}.side-nav a.active{background:var(--accent-soft);color:var(--accent-2);font-weight:600}.side-nav a svg{width:21px;height:21px}.side-nav .bottom{margin-top:auto;display:flex;flex-direction:column;gap:3px;padding-top:16px;border-top:1px solid var(--border)}.side-nav .acct{display:flex;align-items:center;gap:12px;padding:9px 12px;border-radius:10px;color:var(--text)}.side-nav .acct:hover{background:var(--bg1)}.side-nav .acct .av{width:30px;height:30px;border-radius:50%;background:var(--bg3);display:grid;place-items:center;font-family:var(--fmono);font-size:12px;font-weight:700;color:var(--muted)}.side-nav .acct .who{line-height:1.25;text-align:left}.side-nav .acct .who .n{display:block;font-size:13.5px;font-weight:600}.side-nav .acct .who .s{display:block;font-size:11.5px;color:var(--faint)}.content{padding:30px 34px 90px}.home-head h1{font-size:30px}.search-pill{display:flex;align-items:center;gap:12px;min-width:300px;max-width:380px;flex:1;padding:11px 16px;border-radius:12px;background:var(--bg1);border:1px solid var(--border);color:var(--faint);font-size:14.5px;cursor:pointer}.search-pill svg{width:18px;height:18px}.poster-card{width:186px}.cw-card{width:360px}.grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:26px 22px}.course-grid{grid-template-columns:360px minmax(0,720px);gap:60px}.course-rail{position:sticky;top:26px;max-width:none}.course-rail h1{font-size:26px}.content:has(.course-detail){height:100vh;overflow:hidden;padding-bottom:30px;display:flex;flex-direction:column}.content:has(.course-detail) .course-detail{flex:1;min-height:0;display:flex;flex-direction:column;margin:0 auto;width:100%}.content:has(.course-detail) .back-chip{align-self:flex-start;flex:0 0 auto}.content:has(.course-detail) .course-grid{flex:1;min-height:0;align-items:stretch}.content:has(.course-detail) .course-rail{position:static;overflow-y:auto;min-height:0;padding-right:4px}.content:has(.course-detail) .course-main{height:100%;min-height:0;display:flex;flex-direction:column}.content:has(.course-detail) .course-main .about{flex:0 0 auto}.content:has(.course-detail) .lessons-section{flex:1;min-height:0;display:flex;flex-direction:column}.content:has(.course-detail) .lessons-head{flex:0 0 auto;margin-top:26px}.content:has(.course-detail) .lessons-list{flex:1;min-height:0;overflow-y:auto;padding-right:6px}}@media (min-width: 1280px){.content{padding:32px 44px 90px}}