@import url("https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&family=Outfit:wght@400;500;600;700;800&display=swap");:root{color-scheme:dark;--bg:#090c16;--panel:#111525;--panel-2:#171b2c;--border:#272c41;--text:#f5f5fb;--muted:#949bb0;--purple:#9568f8;--purple-bright:#b18dff}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:DM Sans,sans-serif}body{-webkit-font-smoothing:antialiased}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh;display:flex}.sidebar{position:-webkit-sticky;position:sticky;top:0;width:252px;height:100vh;flex-shrink:0;background:#0d1120;border-right:1px solid var(--border);padding:27px 17px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:12px;padding:0 9px;cursor:pointer}.brand-icon{height:43px;width:43px;background:linear-gradient(135deg,#7042d8,#b18dff);border-radius:13px;display:grid;place-items:center;color:white;box-shadow:0 8px 25px #7546e54d}.brand strong{display:block;font-family:Outfit,sans-serif;font-size:16px;letter-spacing:-.5px}.brand small{display:block;color:#777f99;font-size:9px;letter-spacing:1.7px;margin-top:3px}.nav-group{margin-top:47px}.nav-label{margin:0 15px 14px;font-size:10px;letter-spacing:2px;color:#6f7791;font-weight:800}.nav-item{width:100%;display:flex;align-items:center;gap:13px;text-align:left;border:none;border-radius:12px;background:transparent;color:#a1a9bc;font-weight:600;padding:14px 16px;margin-bottom:7px}.nav-item:hover{background:#181c2e;color:white}.nav-item.active{background:#302450;color:#cebaff}.sidebar-bottom{margin-top:auto}.side-help{border-radius:16px;background:linear-gradient(145deg,#291f4e,#171b32);border:1px solid #443467;padding:20px 16px;display:flex;flex-direction:column;gap:12px}.side-help svg{color:#c4a9ff}.side-help strong{font-size:14px}.side-help span{font-size:12px;color:#aaa6ca;line-height:1.6}.main-content{flex:1 1;min-width:0}.topbar{height:78px;border-bottom:1px solid #22273b;display:flex;justify-content:space-between;align-items:center;padding:0 43px}.desktop-location{color:#858da5;font-size:13px;font-weight:600}.mobile-brand{display:none}.profile{display:flex;align-items:center;gap:12px;color:#dce0ef;font-size:13px;font-weight:700}.avatar{height:38px;width:38px;border-radius:50%;background:#413068;border:2px solid #6a4ab0;display:grid;place-items:center;color:#e4d7ff}.page-content{width:min(1260px,100%);padding:35px 43px 70px;margin:0 auto}.hero{display:flex;justify-content:space-between;overflow:hidden;min-height:268px;padding:35px 40px;border-radius:22px;border:1px solid #51378c;background:radial-gradient(circle at 75% 50%,#6640bd70,transparent 40%),linear-gradient(115deg,#21183f,#32205e 65%,#18172d)}.hero,.hero-copy{position:relative}.hero-copy{z-index:2}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:#d9c3ff;font-weight:800;letter-spacing:1.8px;font-size:10px}.hero h1{font-family:Outfit,sans-serif;font-size:clamp(34px,4vw,46px);font-weight:700;line-height:1.15;letter-spacing:-1.6px;margin:17px 0 12px}.hero h1 span{color:#c6aaff}.hero p{max-width:400px;color:#b6a9d3;font-size:13px;line-height:1.7}.hero-stat{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px}.hero-stat span{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;color:#e0d4f4}.hero-art{display:flex;flex:0 0 250px;align-items:center;justify-content:center}.art-orbit{height:160px;width:160px;border:1px solid #aa87ef70;border-radius:42px;display:grid;place-items:center;color:#d9c2ff;transform:rotate(-11deg);background:linear-gradient(145deg,#7957c9,#302152);box-shadow:0 0 75px #9d61ff48}.art-orbit svg{transform:rotate(11deg)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:38px 0 23px}.section-kicker{color:#a981f7;font-weight:800;font-size:11px;letter-spacing:1.7px}.section-head h2{font-family:Outfit,sans-serif;font-size:24px;letter-spacing:-.5px;margin:8px 0 0}.search{display:flex;align-items:center;gap:10px;padding:0 14px;height:43px;width:255px;border-radius:11px;background:#14182a;border:1px solid var(--border);color:#7d86a1}.search input{border:0;outline:0;background:transparent;min-width:0;width:100%;color:white;font-size:13px}.search input::placeholder{color:#79829b}.batch-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:21px;gap:21px}.batch-card{color:inherit;text-align:left;background:#141829;border-radius:17px;border:1px solid #292e44;overflow:hidden;padding:0;transition:transform .15s,border-color .15s}.batch-card:hover{transform:translateY(-4px);border-color:#8659ed}.batch-cover{height:148px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;color:#ffffffb5}.batch-cover svg{z-index:1;filter:drop-shadow(0 10px 18px #0005)}.shade-0{background:linear-gradient(135deg,#44339a,#251c4e)}.shade-1{background:linear-gradient(135deg,#14697c,#173047)}.shade-2{background:linear-gradient(135deg,#a04a5d,#48233c)}.shade-3{background:linear-gradient(135deg,#a06d37,#493326)}.cover-glow{position:absolute;height:160px;width:160px;border:28px solid #ffffff12;border-radius:50%;right:-20px;top:-20px}.batch-tag{position:absolute;left:15px;bottom:15px;border-radius:6px;padding:5px 8px;color:#e8ddff;background:#0f102e76;font-size:9px;font-weight:800;letter-spacing:1px}.batch-info{padding:22px}.batch-type{color:#a58add;font-size:9px;font-weight:800;letter-spacing:1.4px}.batch-info h3{margin:10px 0;font-size:17px;font-family:Outfit,sans-serif;line-height:1.4}.batch-info p{color:#8e96ae;font-size:12px;min-height:34px;line-height:1.6}.batch-meta{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0;color:#a8aec1;font-size:11px}.batch-meta span{display:flex;align-items:center;gap:5px}.card-action{border-top:1px solid #2b3045;padding-top:17px;display:flex;justify-content:space-between;color:#bb9aff;font-size:12px;font-weight:800}.back-link{border:none;background:transparent;color:#a99bcb;display:flex;align-items:center;gap:7px;padding:0;font-size:13px;margin:2px 0 26px}.page-heading h1{margin:8px 0;font-family:Outfit,sans-serif;font-size:clamp(27px,4vw,37px);letter-spacing:-1px}.page-heading p{color:var(--muted);font-size:13px;line-height:1.7}.subtle{color:#858da5;font-size:12px}.subject-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:14px;gap:14px}.subject-card{display:flex;align-items:center;text-align:left;gap:16px;padding:20px;background:#15192a;border:1px solid var(--border);border-radius:15px;color:white}.subject-card:hover{border-color:#9568f8}.subject-card>div:nth-child(2){flex:1 1;min-width:0}.subject-icon{width:51px;height:51px;border-radius:13px;display:grid;place-items:center;flex-shrink:0}.subject-card h3{margin:0 0 7px;font-size:15px;line-height:1.4}.subject-card p{margin:0;color:var(--muted);font-size:12px}.lecture-list{margin-top:29px;display:flex;flex-direction:column;gap:10px}.lecture-row{display:flex;align-items:center;gap:16px;text-align:left;color:white;width:100%;padding:16px 18px;background:#15192a;border:1px solid var(--border);border-radius:13px}.lecture-row:hover{border-color:#9568f8}.lecture-number{display:grid;place-items:center;height:43px;width:43px;border-radius:11px;background:#29203f;color:#c2a3ff;font-size:13px;font-weight:800;flex-shrink:0}.lecture-details{flex:1 1;min-width:0}.lecture-details h3{font-size:14px;margin:0 0 6px;line-height:1.45}.lecture-details p{margin:0;font-size:12px;color:#8993aa}.play-icon{color:#b899fa}.player-heading{margin-bottom:27px}.player-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;grid-gap:20px;gap:20px;align-items:start}.player-main{min-width:0}.video-container{width:100%;aspect-ratio:16/9;border:1px solid #32344b;border-radius:16px;overflow:hidden;background:#030409}.video-container video{display:block;width:100%;height:100%;object-fit:contain;background:black}.no-video{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;text-align:center}.no-video-icon{height:65px;width:65px;display:grid;place-items:center;border-radius:16px;color:#b698ff;background:#211b3a;margin-bottom:15px}.no-video h3{font-size:16px;margin:0 0 8px}.no-video p{max-width:330px;font-size:12px;line-height:1.7;color:#9198b2;margin:0}.lesson-tools{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:20px 0}.lesson-tools h3{margin:0 0 6px;font-size:17px}.lesson-tools p{margin:0;color:var(--muted);font-size:12px}.primary-button{background:#8756e7;border:0;color:white;border-radius:10px;padding:12px 16px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:800;font-size:12px;white-space:nowrap}.primary-button:hover{background:#996cf6}.note-panel{background:#141829;border:1px solid var(--border);border-radius:15px;overflow:hidden}.tab-header{padding:11px 15px 0;border-bottom:1px solid var(--border)}.tab,.tab-header{display:flex;gap:8px}.tab{align-items:center;border:0;border-bottom:2px solid transparent;color:#9199b1;background:transparent;padding:12px 13px;font-size:12px;font-weight:700}.active-tab{color:#c09eff;border-bottom-color:#9868f4}.notes-content{padding:23px}.notes-content h3{margin:0 0 9px;font-size:16px}.notes-content p{color:#939bb2;line-height:1.6;font-size:12px}.notes-content textarea{margin-top:14px;width:100%;min-height:175px;resize:vertical;border:1px solid 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#282c40;padding:15px;color:#d9dce9}.playlist-row.selected,.playlist-row:hover{background:#2a2244}.playlist-index{display:grid;place-items:center;height:27px;width:27px;flex-shrink:0;border-radius:7px;background:#27213c;color:#b59af4;font-size:11px;font-weight:800}.playlist-row strong{display:block;font-size:12px;line-height:1.5;font-weight:700}.playlist-row small{display:block;color:#8e95aa;margin-top:5px}.empty-state{min-height:320px;border:1px dashed #353950;background:#111525;border-radius:18px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px;text-align:center;color:#b39ae9}.empty-state h3{color:white;margin:17px 0 4px}.empty-state p{max-width:380px;color:#949bb0;font-size:13px;line-height:1.7}.spinner{width:32px;height:32px;border:3px solid #403357;border-top-color:#ac89fc;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}@media (max-width:1150px){.batch-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.player-layout{grid-template-columns:minmax(0,1fr)}.playlist{max-height:300px}}@media (max-width:780px){.sidebar{display:none}.topbar{height:64px;padding:0 20px}.desktop-location{display:none}.mobile-brand{display:flex;align-items:center;gap:10px;font-size:14px;color:#d8c6ff}.page-content{padding:20px 17px 55px}.hero{padding:26px 24px;min-height:235px}.hero-art{display:none}.section-head{align-items:stretch;flex-direction:column}.search{width:100%}.subject-grid{grid-template-columns:1fr}}@media (max-width:520px){.batch-grid{grid-template-columns:1fr}.hero h1{font-size:34px}.hero-stat{gap:12px}.profile span{display:none}.lesson-tools{flex-direction:column;align-items:stretch}.primary-button{width:100%}.batch-cover{height:155px}.lecture-row{padding:14px 12px;gap:11px}.lecture-details h3{font-size:12px}.video-container{border-radius:10px}}:root{--lecture-tg-top:0px;--lecture-tg-bottom:0px}.app-shell{box-sizing:border-box;min-height:100dvh;padding-top:max(16px,calc(var(--lecture-tg-top) + 12px));padding-bottom:max(12px,var(--lecture-tg-bottom))}body,html{overflow-x:hidden}