:root{--bg:#070710;--panel:rgba(18,16,31,.78);--panel2:rgba(255,255,255,.075);--line:rgba(255,255,255,.14);--text:#fffaff;--muted:#b9b1c7;--violet:#8d46ff;--pink:#ff69d2;--cyan:#54d7ff;--gold:#f2c86b;--green:#54df98;color-scheme:dark;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}body{margin:0;min-height:100vh;color:var(--text);background:radial-gradient(circle at 18% 8%,rgba(141,70,255,.28),transparent 30%),radial-gradient(circle at 88% 2%,rgba(84,215,255,.16),transparent 28%),linear-gradient(180deg,#10091a,var(--bg) 46%,#030306)}button,input,select,textarea{font:inherit}button{border:0;color:inherit;cursor:pointer}.app-shell{width:min(1180px,100%);margin:0 auto;padding:16px 14px 96px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}.brand{display:flex;align-items:center;gap:10px;padding:6px 8px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.06)}.brand img{width:48px;height:48px;object-fit:contain}.brand span{display:grid;text-align:left}.brand strong{font-size:1.05rem}.brand small,.section-head span,.muted{color:var(--muted)}.profile{width:46px;height:46px;border-radius:16px;background:linear-gradient(135deg,var(--violet),var(--pink));font-weight:900}
.announcement{position:relative;min-height:310px;overflow:hidden;border:1px solid var(--line);border-radius:28px;background:#0b0713;box-shadow:0 24px 70px rgba(0,0,0,.42)}.slides{height:100%;display:flex;transition:transform .55s ease}.slide{position:relative;min-width:100%;min-height:310px;padding:34px;display:flex;align-items:end;overflow:hidden}.slide:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,5,10,.86),rgba(5,5,10,.38) 45%,rgba(5,5,10,.18));z-index:1}.slide img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.slide-content{position:relative;z-index:2;max-width:570px}.pill{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border:1px solid rgba(242,200,107,.36);border-radius:999px;color:var(--gold);background:rgba(242,200,107,.09);font-size:.74rem;font-weight:900;text-transform:uppercase}h1,h2,h3,h4,p{margin-top:0;letter-spacing:0}.slide h1{margin:12px 0 10px;font-size:clamp(2.1rem,7vw,5rem);line-height:.92;max-width:760px}.slide p{max-width:520px;color:#e6dded;line-height:1.48}.slide-dots{position:absolute;z-index:3;right:22px;bottom:20px;display:flex;gap:8px}.slide-dots button{width:34px;height:6px;border-radius:99px;background:rgba(255,255,255,.28)}.slide-dots button.active{background:#fff}
.quick-tabs{position:sticky;top:0;z-index:10;display:grid;grid-template-columns:repeat(6,max-content);gap:8px;overflow-x:auto;margin:16px 0 24px;padding:8px;border:1px solid var(--line);border-radius:18px;background:rgba(7,7,16,.82);backdrop-filter:blur(16px)}.quick-tabs button{min-height:40px;padding:0 14px;border-radius:12px;background:transparent;color:var(--muted);font-weight:850}.quick-tabs button.active{background:rgba(255,255,255,.11);color:#fff}.panel{display:none}.panel.active{display:block}
.dashboard{display:grid;grid-template-columns:1fr repeat(3,150px);gap:14px}.continue-card,.stat-card,.course-card,.subject-card,.lesson-row,.admin-form,.subject-hero,.admin-hero{border:1px solid var(--line);background:var(--panel2);border-radius:22px}.continue-card{position:relative;min-height:230px;overflow:hidden;padding:24px}.continue-card h1{max-width:530px;margin:12px 0 10px;font-size:clamp(1.9rem,5vw,3.8rem);line-height:.95}.continue-card p{max-width:440px;color:var(--muted)}.continue-card img{position:absolute;right:8px;bottom:-12px;width:230px;max-width:42%;filter:drop-shadow(0 20px 35px rgba(141,70,255,.36))}.primary{min-height:44px;padding:0 18px;border-radius:14px;background:linear-gradient(135deg,var(--violet),var(--pink));color:white;font-weight:900}.stat-card{min-height:110px;padding:18px;display:grid;align-content:center}.stat-card strong{font-size:2.1rem}.stat-card span{color:var(--muted)}
.section-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:28px 0 14px}.section-head h2{margin:0;font-size:1.35rem}.section-head button{min-height:36px;padding:0 12px;border-radius:12px;background:rgba(255,255,255,.08);border:1px solid var(--line)}.subject-rail{display:grid;grid-auto-flow:column;grid-auto-columns:220px;gap:12px;overflow-x:auto;padding-bottom:6px}.subject-card{padding:16px;min-height:132px;display:grid;align-content:space-between;text-align:left}.subject-card i{width:42px;height:42px;display:grid;place-items:center;border-radius:14px;background:rgba(255,255,255,.1);font-style:normal;font-weight:900}.subject-card strong{font-size:1.08rem}.subject-card span{color:var(--muted);font-size:.88rem}
.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.course-card{overflow:hidden}.course-cover{position:relative;min-height:190px;background:linear-gradient(135deg,rgba(141,70,255,.24),rgba(84,215,255,.14))}.course-cover img{width:100%;height:210px;object-fit:cover;padding:0;filter:drop-shadow(0 18px 25px rgba(0,0,0,.25))}.course-body{padding:16px}.course-body h3{margin-bottom:8px}.course-body p{min-height:44px;color:var(--muted);line-height:1.4}.meta{display:flex;justify-content:space-between;gap:8px;margin-bottom:12px;color:var(--muted);font-size:.84rem}.bar{height:8px;overflow:hidden;border-radius:999px;background:rgba(255,255,255,.11);margin:12px 0}.bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--green),var(--gold),var(--pink))}.skeleton-card{position:relative}.skeleton-card:after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,transparent,rgba(255,255,255,.14),transparent);animation:sheen 1.4s infinite;pointer-events:none}@keyframes sheen{from{transform:translateX(-100%)}to{transform:translateX(100%)}}.card-actions{display:grid;grid-template-columns:1fr max-content 44px;gap:8px}.card-actions button{min-height:44px;border-radius:14px;font-weight:900}.watch{background:#fff;color:#180d22}.materials,.ghost-action{padding:0 12px;background:rgba(84,215,255,.12);border:1px solid rgba(84,215,255,.25);color:#d8f7ff}.fav{background:rgba(255,255,255,.09);border:1px solid var(--line);color:var(--pink)}
.search input,.admin-form input,.admin-form select,.admin-form textarea{width:100%;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.08);color:#fff;outline:0}.search input{min-height:42px;padding:0 14px;min-width:min(460px,54vw)}.subject-hero,.admin-hero{position:relative;overflow:hidden;min-height:250px;padding:24px;display:flex;align-items:end}.subject-hero img,.admin-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.78}.subject-hero:after,.admin-hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,7,16,.9),rgba(7,7,16,.22))}.subject-hero div,.admin-hero div{position:relative;z-index:1;max-width:620px}.subject-hero h2,.admin-hero h2{margin:12px 0 10px;font-size:clamp(2rem,6vw,4rem);line-height:.94}.subject-hero p,.admin-hero p{color:#e6dded;line-height:1.5}.subject-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:16px}
.lesson-stack{display:grid;gap:10px}.drawer-section-title{margin:12px 0 2px;color:var(--gold);font-weight:900;text-transform:uppercase;font-size:.78rem}.lesson-row{width:100%;min-height:72px;padding:12px;display:grid;grid-template-columns:1fr max-content;align-items:center;gap:12px;text-align:left}.lesson-row strong{display:block}.lesson-row span{color:var(--muted);font-size:.9rem}.lesson-row button{width:44px;height:44px;border-radius:14px;background:var(--violet);font-weight:900}.more-row{border-style:dashed;background:rgba(84,215,255,.07)}.more-row strong{color:#d8f7ff}.more-row button{background:rgba(84,215,255,.18);color:#d8f7ff}.material-row button{background:linear-gradient(135deg,var(--cyan),var(--green));color:#061016}.admin-form{display:grid;gap:14px;padding:16px;margin-top:16px}.admin-form p{color:var(--muted);margin-bottom:0}.admin-form label{display:grid;gap:8px;color:var(--muted);font-weight:750}.admin-form input,.admin-form select{min-height:46px;padding:0 12px}.admin-form textarea{min-height:110px;padding:12px;resize:vertical}.import-box h3{margin:0}.ghost-action{min-height:44px;border-radius:14px;font-weight:900}
.drawer{position:fixed;inset:0;z-index:30;display:none}.drawer.open{display:block}.drawer-bg{position:absolute;inset:0;background:rgba(0,0,0,.68);backdrop-filter:blur(12px)}.drawer-panel{position:absolute;inset:18px;margin:auto;width:min(980px,calc(100% - 28px));height:min(760px,calc(100% - 28px));display:grid;grid-template-columns:360px 1fr;overflow:hidden;border:1px solid var(--line);border-radius:26px;background:#100b19;box-shadow:0 28px 90px rgba(0,0,0,.58)}.close{position:absolute;z-index:2;right:14px;top:14px;width:44px;height:44px;border-radius:15px;background:rgba(0,0,0,.44);font-size:1.55rem}.drawer-cover{width:100%;height:100%;min-height:360px;object-fit:contain;background:radial-gradient(circle at 50% 50%,rgba(141,70,255,.28),transparent 52%),linear-gradient(135deg,rgba(141,70,255,.22),rgba(84,215,255,.1))}.drawer-body{padding:24px;overflow:auto}.drawer-body h2{margin:12px 0 8px;font-size:2rem}.drawer-body p{color:var(--muted);line-height:1.5}.progress{display:grid;grid-template-columns:48px 1fr;gap:10px;align-items:center;margin:16px 0}.progress i{height:9px;border-radius:999px;background:rgba(255,255,255,.12);overflow:hidden}.progress i:before{content:"";display:block;width:var(--w,0%);height:100%;background:linear-gradient(90deg,var(--green),var(--gold),var(--pink))}.favorite-toggle{width:100%;min-height:44px;margin-bottom:16px;border-radius:14px;background:rgba(255,255,255,.09);border:1px solid var(--line);font-weight:900}
.toast{position:fixed;left:50%;bottom:22px;z-index:40;transform:translateX(-50%) translateY(18px);opacity:0;max-width:min(420px,calc(100% - 28px));padding:12px 16px;border-radius:14px;border:1px solid var(--line);background:rgba(18,16,31,.96);transition:.2s ease;pointer-events:none}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.watcher{position:fixed;inset:0;z-index:35;display:none}.watcher.open{display:block}.watcher-bg{position:absolute;inset:0;background:rgba(0,0,0,.74)}.watcher-panel{position:absolute;inset:18px;width:min(1240px,calc(100% - 28px));height:min(760px,calc(100% - 28px));margin:auto;display:grid;grid-template-columns:1fr 360px;grid-template-rows:1fr auto;border:1px solid var(--line);border-radius:24px;background:#0e0a16;overflow:hidden;box-shadow:0 28px 90px rgba(0,0,0,.55)}.player-box{position:relative;display:grid;place-items:center;min-height:360px;background:radial-gradient(circle at 50% 50%,rgba(141,70,255,.34),transparent 40%),linear-gradient(135deg,#070710,#171027)}.player-box video{position:absolute;inset:0;width:100%;height:100%;display:none;background:#000;object-fit:contain}.player-box video.ready{display:block}.player-fallback{position:absolute;inset:0;display:none;place-items:center;text-align:center;padding:22px}.player-fallback.show{display:grid}.player-fallback img{width:min(360px,58%);filter:drop-shadow(0 24px 40px rgba(141,70,255,.42))}.player-fallback p{max-width:420px;margin:0 auto;color:#e9dff3;font-weight:800}.play-orb{position:absolute;z-index:2;width:86px;height:86px;display:grid;place-items:center;border-radius:50%;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);font-size:2rem;backdrop-filter:blur(10px)}.watch-info{padding:18px;border-top:1px solid var(--line)}.watch-info h2{margin:10px 0 8px;font-size:1.65rem}.watch-info p{color:var(--muted)}.watch-list{grid-column:2;grid-row:1/3;overflow:auto;border-left:1px solid var(--line);padding:18px;background:rgba(255,255,255,.04)}.watch-list h3{margin:0 0 12px}.watch-list .lesson-row.current{border-color:rgba(242,200,107,.65);background:rgba(242,200,107,.12)}
@media(max-width:900px){.dashboard{grid-template-columns:repeat(3,1fr)}.continue-card{grid-column:1/-1}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.drawer-panel{grid-template-columns:1fr;height:min(860px,calc(100% - 28px))}.drawer-cover{height:260px;min-height:260px}.watcher-panel{grid-template-columns:1fr;grid-template-rows:auto auto 1fr}.watch-list{grid-column:auto;grid-row:auto;border-left:0;border-top:1px solid var(--line)}}@media(max-width:640px){.announcement,.slide{min-height:430px}.slide{padding:22px;align-items:center}.slide:before{background:linear-gradient(180deg,rgba(5,5,10,.82),rgba(5,5,10,.38))}.dashboard,.course-grid,.subject-list{grid-template-columns:1fr}.continue-card img{width:170px;max-width:48%;opacity:.55}.search{width:100%}.search input{min-width:100%}.subject-hero,.admin-hero{min-height:360px;align-items:center}.drawer-panel,.watcher-panel{inset:0;width:100%;height:100%;border-radius:0}.player-box{min-height:260px}}