:root{--bg:#070a08;--panel:#111512;--panel2:#171b18;--line:#283029;--muted:#8f9991;--text:#f4f7f4;--green:#55f875;--green2:#25cf58;--danger:#ff6b78;--shadow:0 28px 90px #0009}*{box-sizing:border-box}html{color-scheme:dark}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 'DM Sans',sans-serif;min-height:100vh}.aurora{position:fixed;inset:0;background:radial-gradient(circle at 15% 10%,#17331f 0,transparent 30%),radial-gradient(circle at 92% 65%,#0d4a2655 0,transparent 35%);pointer-events:none}.grid{position:fixed;inset:0;background-image:linear-gradient(#ffffff08 1px,transparent 1px),linear-gradient(90deg,#ffffff08 1px,transparent 1px);background-size:64px 64px;mask-image:linear-gradient(to bottom,#0009,transparent);pointer-events:none}.glass{background:#111512df;border:1px solid #ffffff12;box-shadow:var(--shadow);backdrop-filter:blur(24px)}button,input,textarea,select{font:inherit}.boot{position:fixed;inset:0;display:grid;place-content:center;text-align:center;gap:8px;z-index:20;background:var(--bg)}.boot strong{font:800 25px Manrope}.boot span{color:var(--muted)}.brand-mark{display:grid;place-items:center;width:45px;height:45px;border-radius:14px;background:linear-gradient(135deg,#75ff8c,#20c953);color:#071008;font:800 22px Manrope;box-shadow:0 0 35px #40f46b55}.boot .brand-mark{margin:auto}.shell{position:relative;z-index:1;padding:18px;max-width:1880px;margin:auto}.topbar{height:76px;border-radius:22px;display:grid;grid-template-columns:280px minmax(280px,660px) 1fr;gap:24px;align-items:center;padding:0 18px;margin-bottom:16px}.brand{display:flex;align-items:center;gap:12px;color:var(--text);text-decoration:none;font:800 18px Manrope}.brand>span:last-child{display:grid;line-height:1.05}.brand>span>span{color:var(--green)}.brand small{font:600 8px 'JetBrains Mono';letter-spacing:.32em;color:var(--muted);margin-top:6px}.search{height:44px;background:#090c0a;border:1px solid var(--line);border-radius:13px;display:flex;align-items:center;padding:0 13px;gap:10px}.search input{flex:1;background:transparent;border:0;outline:0;color:var(--text)}kbd{border:1px solid var(--line);border-radius:6px;padding:3px 7px;color:#7e8880;font:10px 'JetBrains Mono'}.account{justify-self:end;display:flex;align-items:center;gap:10px}.account>span:nth-child(2){display:grid}.account small{color:var(--muted)}.account a{color:var(--green);text-decoration:none;margin-left:14px}.avatar{width:38px;height:38px;border-radius:12px;background:#193f23;color:var(--green);display:grid;place-items:center;font-weight:800}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 430px;gap:16px;align-items:start}.lesson-stage{background:#0d100e;border:1px solid var(--line);border-radius:26px;overflow:hidden;min-height:calc(100vh - 112px)}.crumb{height:60px;padding:0 28px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);font:600 11px 'JetBrains Mono';letter-spacing:.12em;color:var(--green)}.crumb span+span{color:var(--muted)}.crumb .icon-btn{margin-left:auto}.icon-btn{border:1px solid var(--line);background:#141815;color:var(--text);width:36px;height:36px;border-radius:11px;cursor:pointer}.media{aspect-ratio:16/7.2;background:#050706;display:grid;place-items:center;border-bottom:1px solid var(--line);overflow:hidden}.media iframe,.media video{width:100%;height:100%;border:0}.media-empty{text-align:center;display:grid;justify-items:center;gap:8px}.media-empty>span{width:68px;height:68px;border-radius:50%;display:grid;place-items:center;background:var(--green);color:#071008;font-size:25px;box-shadow:0 0 60px #51f77666}.media-empty small{color:var(--muted)}.notice-view,.text-view{width:min(780px,90%);padding:40px}.notice-view{border:1px solid #4be76d55;background:#102416;border-radius:24px}.text-view h2,.notice-view h2{font:800 32px Manrope;margin:0 0 12px}.lesson-head{display:flex;justify-content:space-between;gap:25px;padding:32px 34px}.lesson-head h1{font:800 clamp(30px,3vw,48px)/1.08 Manrope;margin:6px 0 10px;letter-spacing:-.04em}.lesson-head p{color:var(--muted);max-width:760px;margin:0}.lesson-head>div>p:first-child{font:600 11px 'JetBrains Mono';letter-spacing:.18em;color:var(--green)}button{cursor:pointer}.primary,.secondary{border-radius:12px;border:1px solid transparent;padding:13px 18px;font-weight:750;align-self:center}.primary{background:var(--green);color:#061008;box-shadow:0 10px 30px #40ef6640}.secondary{background:#171b18;color:var(--text);border-color:var(--line)}.lesson-tabs{padding:0 34px;border-bottom:1px solid var(--line);display:flex;gap:24px}.lesson-tabs button{padding:15px 2px;border:0;border-bottom:2px solid transparent;background:transparent;color:var(--muted);font-weight:700}.lesson-tabs button.active{color:var(--text);border-color:var(--green)}.lesson-tabs span{background:#1b3c23;color:var(--green);border-radius:99px;padding:2px 7px;margin-left:5px}.tab-panel{padding:30px 34px}.prose{font-size:17px;max-width:900px}.prose h2{font:800 28px Manrope}.prose p,.prose li{color:#b8c0ba}.resources{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.resources a{padding:10px 14px;background:#161b17;border:1px solid var(--line);border-radius:10px;color:var(--green);text-decoration:none}.field{display:grid;gap:8px}.field span{font-weight:700}.field small{color:var(--muted);font-weight:400;margin-left:8px}textarea,input,select{background:#090c0a;border:1px solid var(--line);border-radius:12px;color:var(--text);padding:13px;outline:0;width:100%}textarea:focus,input:focus,select:focus{border-color:#4deb6b88;box-shadow:0 0 0 3px #4deb6b12}.comment-form{display:grid;gap:12px;background:#131713;border:1px solid var(--line);border-radius:18px;padding:18px}.comment-author{display:grid;grid-template-columns:minmax(180px,300px) 1fr;align-items:end;gap:16px}.comment-author label{display:grid;gap:6px}.comment-author small{color:var(--muted);padding-bottom:12px}.comment-form .primary{justify-self:end}.comments{display:grid;gap:12px;margin-top:18px}.comment{padding:17px;background:#111512;border:1px solid var(--line);border-radius:16px}.comment header{display:flex;align-items:center;gap:10px}.comment header strong{font:700 15px Manrope}.comment time{color:var(--muted);font-size:12px}.comment p{margin:10px 0 0;color:#c7cec8}.comment .reply{margin:12px 0 0 34px;border-left:2px solid #2f8f46;padding-left:14px}.lesson-nav{display:flex;justify-content:space-between;padding:20px 34px 34px}.course-rail{border-radius:26px;position:sticky;top:18px;height:calc(100vh - 36px);display:flex;flex-direction:column;overflow:hidden}.rail-head{padding:22px;display:flex;justify-content:space-between;border-bottom:1px solid var(--line)}.rail-head span{font:600 10px 'JetBrains Mono';letter-spacing:.18em;color:var(--green)}.rail-head h2{font:800 22px Manrope;margin:5px 0 0}.progress-card{margin:16px;display:flex;align-items:center;gap:15px;background:#0a0d0b;border:1px solid var(--line);border-radius:17px;padding:14px}.ring{width:66px;height:66px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--green) 0%,#252b26 0);position:relative}.ring:after{content:"";position:absolute;inset:7px;background:#0a0d0b;border-radius:50%}.ring strong{z-index:1;font:800 15px Manrope}.progress-card>div:last-child{display:grid;flex:1}.progress-card small{color:var(--muted)}.progress-card button{color:var(--green);background:transparent;border:0;text-align:left;padding:5px 0;font-weight:700}.rail-filters{display:flex;gap:6px;padding:0 16px 14px}.rail-filters button{border:1px solid var(--line);background:transparent;color:var(--muted);border-radius:9px;padding:7px 10px;font-size:12px}.rail-filters button.active{background:#183720;color:var(--green);border-color:#2d7740}.modules{overflow:auto;padding:0 10px 15px;scrollbar-width:thin;scrollbar-color:#3add61 transparent}.module{border:1px solid var(--line);border-radius:15px;margin:0 6px 10px;overflow:hidden;background:#0b0e0c}.module>button{width:100%;display:flex;align-items:center;gap:12px;background:#151916;border:0;color:var(--text);text-align:left;padding:14px}.module-index{font:700 11px 'JetBrains Mono';color:var(--green)}.module>button span:nth-child(2){display:grid;flex:1}.module>button small{color:var(--muted)}.lesson-list{display:grid}.lesson-item{display:grid;grid-template-columns:28px 1fr auto;gap:10px;align-items:center;padding:12px 14px;border:0;border-top:1px solid #ffffff0b;background:transparent;color:#cbd1cc;text-align:left}.lesson-item:hover,.lesson-item.active{background:#193720;color:white}.lesson-item .state{width:24px;height:24px;border:1px solid #354039;border-radius:8px;display:grid;place-items:center;font-size:10px}.lesson-item.done .state{background:var(--green);color:#071008;border-color:var(--green)}.lesson-item b{font-size:13px}.lesson-item small{color:var(--muted)}.lesson-item>small{font:10px 'JetBrains Mono'}.rail-foot{margin-top:auto;border-top:1px solid var(--line);padding:14px 16px;display:grid;gap:9px}.rail-foot a{font-size:12px;color:var(--muted);text-decoration:none;display:flex;justify-content:space-between}.rail-foot b{color:var(--green)}.studio{border:1px solid #3ac85b;background:#12371c;color:var(--green);border-radius:11px;padding:11px;font-weight:750}.open-rail{display:none}.studio-modal{width:min(760px,94vw);max-height:90vh;border:1px solid var(--line);border-radius:24px;background:#101411;color:var(--text);box-shadow:var(--shadow);padding:0}.studio-modal::backdrop{background:#000b;backdrop-filter:blur(10px)}.modal-head{display:flex;justify-content:space-between;padding:24px;border-bottom:1px solid var(--line)}.modal-head span{color:var(--green);font:600 10px 'JetBrains Mono';letter-spacing:.18em}.modal-head h2{margin:5px 0;font:800 28px Manrope}.modal-head p{margin:0;color:var(--muted)}.modal-head button{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#171b18;color:white}.studio-body{padding:24px;overflow:auto}.studio-switch{display:flex;gap:8px;margin-bottom:18px}.studio-switch button{padding:10px 14px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--muted)}.studio-switch .active{background:#183720;color:var(--green)}.studio-body form{display:grid;gap:14px}.studio-body label{display:grid;gap:6px;font-weight:700}.row{display:flex;gap:12px}.row>*{flex:1}.check{display:flex!important;grid-template-columns:20px 1fr;align-items:center}.check input{width:auto}.toast{position:fixed;left:50%;bottom:25px;transform:translate(-50%,30px);opacity:0;background:#151a16;border:1px solid #3b7749;border-radius:12px;padding:12px 18px;transition:.25s;z-index:50}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:1100px){.topbar{grid-template-columns:1fr auto}.search{grid-row:2;grid-column:1/-1}.topbar{height:auto;padding:14px}.workspace{grid-template-columns:1fr}.course-rail{position:fixed;right:10px;top:10px;bottom:10px;height:auto;width:min(430px,calc(100vw - 20px));z-index:30;transform:translateX(110%);transition:.35s}.course-rail.open{transform:none}.open-rail{display:block;position:fixed;right:18px;bottom:18px;z-index:20;background:var(--green);color:#071008;border:0;border-radius:14px;padding:13px 17px;font-weight:800}.account>span:nth-child(2),.account a{display:none}}
@media(max-width:650px){.shell{padding:8px}.topbar{border-radius:17px}.lesson-stage{border-radius:18px}.lesson-head{display:grid;padding:23px 18px}.lesson-tabs,.tab-panel,.lesson-nav{padding-left:18px;padding-right:18px}.lesson-tabs{overflow:auto}.media{aspect-ratio:16/10}.comment-author,.row{display:grid;grid-template-columns:1fr}.account{display:none}.search kbd{display:none}.brand{font-size:16px}.lesson-head h1{font-size:32px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}