:root{
 --bg:#070914;--panel:rgba(16,19,40,.72);--panel2:rgba(23,27,55,.86);--text:#f6f7ff;--muted:#9ca6c7;
 --line:rgba(255,255,255,.09);--cyan:#55f3e4;--violet:#a37cff;--pink:#ff75c9;--green:#7cf7a3;
 --orange:#ffad69;--blue:#72b6ff;--lime:#a9f75f;--shadow:0 30px 80px rgba(0,0,0,.35);
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 60% -10%,#171b47 0,#070914 44%);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;min-height:100vh}
a{color:inherit;text-decoration:none}.bg-orb{position:fixed;border-radius:50%;filter:blur(85px);opacity:.18;pointer-events:none;z-index:-1}.orb-a{width:420px;height:420px;background:#7d5cff;top:8%;right:8%}.orb-b{width:360px;height:360px;background:#00e6c7;bottom:2%;left:25%}
.sidebar{position:fixed;left:0;top:0;bottom:0;width:235px;border-right:1px solid var(--line);background:rgba(7,9,20,.68);backdrop-filter:blur(22px);padding:28px 18px;display:flex;flex-direction:column;z-index:50}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:36px}.brand strong{display:block}.brand small{color:var(--muted)}
.brand-cube{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;background:linear-gradient(145deg,#7d5cff,#25e6d0);box-shadow:0 10px 35px rgba(88,87,255,.32);transform:rotate(-7deg);font-weight:900}.brand-cube span{transform:rotate(7deg)}
nav{display:grid;gap:7px}nav a{display:flex;gap:12px;align-items:center;padding:12px 13px;border-radius:14px;color:var(--muted);font-size:14px}nav a svg{width:19px}nav a:hover,nav a.active{background:rgba(255,255,255,.07);color:#fff}
.apk-btn{margin-top:auto;border:1px solid rgba(125,92,255,.35);background:linear-gradient(145deg,rgba(125,92,255,.22),rgba(31,230,203,.08));border-radius:18px;padding:14px;display:flex;align-items:center;gap:11px}.apk-btn svg{color:#8e7bff}.apk-btn small,.side-foot{color:var(--muted);font-size:11px}.apk-btn b{display:block;font-size:13px}.side-foot{margin-top:16px;line-height:1.7;padding-left:5px}
main{margin-left:235px;padding:0 5vw}.hero{min-height:72vh;display:grid;grid-template-columns:1.2fr .75fr;gap:7vw;align-items:center;padding-top:40px}
.eyebrow,.kicker{font-size:11px;letter-spacing:.16em;font-weight:800;color:#aeb6d6}.live-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#69f19d;box-shadow:0 0 0 5px rgba(105,241,157,.1);margin-right:8px}
.hero h1{font-size:clamp(48px,6vw,88px);line-height:.94;letter-spacing:-.055em;margin:16px 0 22px;max-width:900px}.hero h1 span{background:linear-gradient(90deg,#a88cff,#5ce3f1,#73f0a5);-webkit-background-clip:text;color:transparent}
.hero p{font-size:17px;line-height:1.7;color:var(--muted);max-width:640px}.hero-actions{display:flex;gap:12px;margin-top:28px}
.primary-btn,.ghost-btn{border:0;border-radius:14px;padding:13px 18px;font:inherit;font-weight:750;display:inline-flex;align-items:center;justify-content:center;gap:9px;cursor:pointer}.primary-btn{background:linear-gradient(135deg,#896aff,#4ddfd2);color:#071016;box-shadow:0 12px 30px rgba(76,215,208,.16)}.ghost-btn{background:rgba(255,255,255,.07);border:1px solid var(--line);color:#fff}.primary-btn svg,.ghost-btn svg{width:17px}.full{width:100%}
.now-card{min-height:360px;padding:28px;border:1px solid rgba(255,255,255,.12);border-radius:30px;background:linear-gradient(145deg,rgba(36,40,80,.78),rgba(13,16,34,.78));box-shadow:var(--shadow);transform-style:preserve-3d;position:relative;overflow:hidden}.now-card:before{content:"";position:absolute;width:190px;height:190px;border-radius:50%;background:#765cff;filter:blur(55px);opacity:.22;right:-25px;top:-30px}.now-top{display:flex;justify-content:space-between;color:#c4c9e2;font-size:11px;letter-spacing:.14em}.clock{font-size:54px;font-weight:850;letter-spacing:-.04em;margin-top:54px}.date{color:var(--muted);margin-top:4px}.divider{height:1px;background:var(--line);margin:28px 0 18px}.now-card small{color:var(--muted)}.now-card h3{font-size:22px;margin:7px 0}.countdown{color:#6ff1c5;font-weight:700}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:90px}.stat-row article{background:rgba(255,255,255,.045);border:1px solid var(--line);border-radius:18px;padding:18px;display:flex;align-items:center;gap:13px}.stat-row svg{color:#8d82ff}.stat-row b{display:block;font-size:18px}.stat-row span{font-size:12px;color:var(--muted)}
.section{padding:90px 0 15px}.section.compact{padding-top:50px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}.section-head h2{font-size:38px;letter-spacing:-.03em;margin:7px 0 0}.section-head p{color:var(--muted);max-width:430px;line-height:1.6}
.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.subject-card{min-height:245px;background:linear-gradient(145deg,rgba(25,29,58,.84),rgba(12,15,31,.9));border:1px solid var(--line);border-radius:24px;padding:22px;display:flex;flex-direction:column;box-shadow:0 14px 35px rgba(0,0,0,.15);transform-style:preserve-3d;transition:.25s}.subject-card:hover{transform:translateY(-6px) rotateX(2deg);border-color:rgba(255,255,255,.18)}.card-icon{width:48px;height:48px;border-radius:15px;display:grid;place-items:center;background:rgba(255,255,255,.07)}.card-icon.big{width:72px;height:72px;border-radius:22px}.type{font-size:10px;letter-spacing:.12em;color:var(--muted);margin-top:24px}.subject-card h3{font-size:20px;margin:8px 0}.subject-card p{color:var(--muted);margin:0}.card-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;font-size:12px;color:#cad0e9}
.accent-cyan .card-icon,.accent-cyan .file-icon{color:var(--cyan)}.accent-green .card-icon,.accent-green .file-icon{color:var(--green)}.accent-lime .card-icon,.accent-lime .file-icon{color:var(--lime)}.accent-orange .card-icon,.accent-orange .file-icon{color:var(--orange)}.accent-blue .card-icon,.accent-blue .file-icon{color:var(--blue)}.accent-violet .card-icon,.accent-violet .file-icon{color:var(--violet)}.accent-pink .card-icon,.accent-pink .file-icon{color:var(--pink)}
.day-tabs,.folder-tabs{display:flex;gap:9px;overflow:auto;padding-bottom:8px}.day-tabs button,.folder-tabs button{white-space:nowrap;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--muted);border-radius:12px;padding:10px 14px;cursor:pointer}.day-tabs button.active,.folder-tabs button.active{color:#06100f;background:#6ce4d5;border-color:transparent;font-weight:800}
.timeline{display:grid;gap:10px;margin-top:14px}.lecture-row{display:grid;grid-template-columns:120px 1fr auto;gap:18px;align-items:center;border:1px solid var(--line);background:rgba(255,255,255,.035);border-radius:16px;padding:16px}.lecture-time b{display:block}.lecture-time span,.lecture-row p{font-size:12px;color:var(--muted);margin:2px 0}.kind{font-size:10px;border:1px solid var(--line);border-radius:999px;padding:6px 9px;color:#c6cce4}
.upload-section{display:grid;grid-template-columns:.8fr 1fr;gap:9vw;align-items:start;padding-bottom:90px}.upload-copy h2{font-size:45px;margin:8px 0 18px}.upload-copy p{color:var(--muted);line-height:1.7}.safe-note{margin-top:24px;display:flex;gap:10px;color:#8ee6be;font-size:13px}.upload-card{background:rgba(18,22,46,.82);border:1px solid var(--line);border-radius:24px;padding:24px;display:grid;gap:15px;box-shadow:var(--shadow)}label{display:grid;gap:8px;font-size:12px;color:#c7cee9}input,select{width:100%;background:#0d1022;border:1px solid var(--line);border-radius:12px;color:#fff;padding:12px 13px;font:inherit;outline:none}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.file-drop{border:1px dashed rgba(255,255,255,.22);border-radius:16px;padding:22px;text-align:center;place-items:center;cursor:pointer}.file-drop input{display:none}.file-drop svg{color:#7ee9d8}.file-drop span{font-size:11px;color:var(--muted)}.status{font-size:12px;color:#82e8be}.status.error{color:#ff8799}footer{border-top:1px solid var(--line);padding:30px 0 42px;color:var(--muted);font-size:12px}
.subject-main{margin:0 auto;max-width:1180px;padding:35px 24px 80px}.back-link{display:inline-flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:22px}.back-link svg{width:17px}.subject-hero{display:flex;align-items:center;gap:22px;padding:34px;border:1px solid var(--line);border-radius:28px;background:linear-gradient(145deg,rgba(34,39,77,.82),rgba(12,15,31,.88));box-shadow:var(--shadow)}.subject-hero h1{font-size:44px;margin:6px 0}.subject-hero p{color:var(--muted)}
.syllabus-panel{margin-top:20px;border:1px solid rgba(86,234,215,.2);background:linear-gradient(145deg,rgba(31,67,71,.28),rgba(13,17,33,.75));border-radius:22px;padding:23px}.panel-title{display:flex;align-items:center;gap:12px}.panel-title>svg{color:#66ead7}.panel-title span{font-size:10px;color:var(--muted)}.panel-title h2{margin:2px 0}.syllabus-panel>p{color:#bbc3dd;line-height:1.65}
.file-list{display:grid;gap:10px;margin-top:15px}.file-item{display:grid;grid-template-columns:45px 1fr auto;align-items:center;gap:14px;border:1px solid var(--line);border-radius:15px;padding:13px;background:rgba(255,255,255,.035)}.file-icon{width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.06);display:grid;place-items:center}.file-item h4{margin:0 0 3px}.file-item p{margin:0;color:var(--muted);font-size:11px}.download-mini{padding:8px 11px;border-radius:10px;background:rgba(255,255,255,.07);font-size:11px}.empty{color:var(--muted);border:1px dashed var(--line);border-radius:14px;padding:20px;text-align:center}
.upload-dialog{border:1px solid var(--line);background:transparent;padding:0;border-radius:24px;color:#fff;max-width:520px;width:calc(100% - 30px)}.upload-dialog::backdrop{background:rgba(2,3,10,.72);backdrop-filter:blur(8px)}.dialog-close{position:absolute;right:16px;top:13px;background:none;border:0;color:#fff;font-size:26px;cursor:pointer}
@media(max-width:980px){.sidebar{left:12px;right:12px;bottom:12px;top:auto;width:auto;height:68px;border:1px solid var(--line);border-radius:21px;padding:8px 10px;flex-direction:row;align-items:center;justify-content:space-around;background:rgba(8,10,24,.9)}.brand,.side-foot{display:none}.sidebar nav{display:flex;flex:1;justify-content:space-around}.sidebar nav a{padding:11px}.sidebar nav a span{display:none}.apk-btn{margin:0 0 0 6px;padding:11px 13px}.apk-btn div{display:none}.apk-btn svg{width:20px}main{margin:0;padding:0 18px 95px}.hero{grid-template-columns:1fr;gap:28px;padding:70px 0 40px}.hero h1{font-size:52px}.now-card{min-height:300px}.clock{margin-top:35px}.stat-row{grid-template-columns:1fr 1fr;margin-bottom:30px}.subject-grid{grid-template-columns:1fr 1fr}.upload-section{grid-template-columns:1fr;gap:28px}.section{padding-top:65px}.section-head{align-items:start;flex-direction:column;gap:10px}.section-head h2{font-size:32px}.section-head p{margin:0}.subject-main{padding-bottom:100px}.subject-hero{align-items:flex-start}.subject-hero h1{font-size:36px}}
@media(max-width:620px){.hero h1{font-size:43px}.hero p{font-size:15px}.subject-grid{grid-template-columns:1fr}.stat-row{grid-template-columns:1fr 1fr;gap:9px}.stat-row article{padding:13px}.subject-card{min-height:205px}.lecture-row{grid-template-columns:90px 1fr}.lecture-row .kind{display:none}.form-row{grid-template-columns:1fr}.upload-copy h2{font-size:36px}.subject-hero{padding:24px;gap:14px}.subject-hero .big{width:54px;height:54px;flex:0 0 54px}.subject-hero h1{font-size:28px}.file-item{grid-template-columns:40px 1fr}.file-item .download-mini{grid-column:2;width:max-content}.hero-actions{flex-wrap:wrap}}

/* 12-hour live clock readability */
.clock{font-variant-numeric:tabular-nums;white-space:nowrap}
@media(max-width:620px){.clock{font-size:42px}}