:root{--font: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--brand: #6d4efc;--brand-2: #8b6cff;--brand-deep: #5a37e6;--brand-050: #efeafe;--brand-100: #ded4fd;--grad-brand: linear-gradient(135deg, #8b5cf6 0%, #6d4efc 100%);--hero-grad: linear-gradient(165deg, #1a1738 0%, #221f4d 55%, #2b2566 100%);--gloss-overlay: linear-gradient(180deg, rgba(255,255,255,.28) 0%, rgba(255,255,255,.06) 46%, rgba(255,255,255,0) 60%);--gloss-inset: inset 0 1px 0 rgba(255,255,255,.45);--ask: #2f7cf6;--ask-050: #e7f0ff;--quiz: #8b5cf6;--quiz-050: #f0e9ff;--good: #16a34a;--good-050: #e7f7ee;--good-deep: #0f7a42;--coral: #e35a3e;--coral-050: #fceae4;--bg: #f5f5fb;--surface: #ffffff;--surface-2: #f2f2f9;--line: #ececf4;--line-2: #e0e0ee;--ink: #191932;--ink-2: #4a4a63;--muted: #7c7c93;--faint: #a7a7be;--sh-sm: 0 1px 2px rgba(24,24,50,.05);--sh: 0 2px 4px rgba(24,24,50,.04), 0 14px 30px -18px rgba(24,24,50,.22);--sh-lg: 0 3px 8px rgba(24,24,50,.06), 0 26px 50px -24px rgba(24,24,50,.3);--r: 22px;--r-md: 16px;--r-sm: 12px}@media (prefers-color-scheme: dark){:root{--brand: #9b83ff;--brand-2: #b3a1ff;--brand-deep: #c4b6ff;--brand-050: #211b3d;--brand-100: #2c2450;--grad-brand: linear-gradient(135deg, #9b7bff 0%, #7c5cf6 100%);--hero-grad: linear-gradient(165deg, #14122b 0%, #1b1840 55%, #221d52 100%);--ask: #6ea6ff;--ask-050: #16233d;--quiz: #b39bff;--quiz-050: #241c40;--good: #3ecb82;--good-050: #12281c;--good-deep: #8fe6b6;--coral: #ff7a5c;--coral-050: #35201a;--bg: #0e0d1a;--surface: #17162a;--surface-2: #1e1c36;--line: #262441;--line-2: #322f52;--ink: #eeeef7;--ink-2: #c3c2d8;--muted: #9494ad;--faint: #6f6e88;--sh-sm: 0 1px 2px rgba(0,0,0,.4);--sh: 0 2px 4px rgba(0,0,0,.35), 0 16px 34px -18px rgba(0,0,0,.7);--sh-lg: 0 3px 8px rgba(0,0,0,.45), 0 30px 55px -24px rgba(0,0,0,.8)}}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--ink);font-family:var(--font);letter-spacing:-.01em;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent;border:none}button:active{transform:translateY(1px)}input{font-family:inherit}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation:none!important;transition:none!important}}.app{max-width:540px;margin:0 auto;height:100%;display:flex;flex-direction:column;background:var(--bg);position:relative}.screen{flex:1;display:flex;flex-direction:column;min-height:0}.screen.center{justify-content:center;align-items:center;padding:calc(24px + env(safe-area-inset-top)) 24px calc(24px + env(safe-area-inset-bottom));gap:26px}.muted{color:var(--muted)}.pad{padding:16px}.auth{position:relative;flex:1;min-height:0;overflow:hidden;background:var(--hero-grad);display:flex;align-items:center;justify-content:center;padding:calc(24px + env(safe-area-inset-top)) 24px calc(24px + env(safe-area-inset-bottom))}.splash{position:relative;flex:1;min-height:0;overflow:hidden;background:#0e0d1a;display:flex;align-items:center;justify-content:center}.splash-video{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover}.splash-skip{position:absolute;z-index:2;top:calc(14px + env(safe-area-inset-top));right:16px;background:#00000073;color:#fff;border:1px solid rgba(255,255,255,.28);border-radius:100px;padding:9px 18px;font-weight:700;font-size:.85rem;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);min-height:40px}.auth-orb{position:absolute;border-radius:50%;filter:blur(46px);pointer-events:none}.auth-orb.o1{width:280px;height:280px;background:#7c5cff;opacity:.55;top:-90px;right:-70px}.auth-orb.o2{width:240px;height:240px;background:#3b7bff;opacity:.45;bottom:-80px;left:-80px}.auth-orb.o3{width:180px;height:180px;background:#c05bff;opacity:.3;top:42%;left:58%}.auth-inner{position:relative;z-index:2;width:100%;max-width:380px;display:flex;flex-direction:column;align-items:center;animation:rise .5s ease}.auth-logo{width:92px;height:92px;border-radius:26px;display:grid;place-items:center;font-size:44px;margin-bottom:18px;background:var(--gloss-overlay),linear-gradient(135deg,#9b7bff,#6d4efc);box-shadow:0 20px 44px -12px #7c5cf6bf,inset 0 1px #ffffff80}.auth-title{color:#fff;font-size:2.6rem;font-weight:800;letter-spacing:-.03em;margin:0}.auth-title span{color:#b49bff}.auth-tag{color:#ffffffb8;font-weight:500;margin:6px 0 26px;text-align:center}.auth-card{width:100%;background:#ffffff17;border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(18px) saturate(1.3);-webkit-backdrop-filter:blur(18px) saturate(1.3);border-radius:24px;padding:24px;box-shadow:0 26px 64px -26px #000000a6,inset 0 1px #ffffff26}.auth-card label{display:block;color:#ffffffe0;font-weight:700;margin-bottom:10px;font-size:.92rem}.auth-card input{width:100%;text-align:center;text-transform:uppercase;letter-spacing:.2em;font-weight:800;font-size:1.35rem;color:#fff;padding:15px;border-radius:14px;border:1.5px solid rgba(255,255,255,.22);background:#ffffff14;min-height:56px}.auth-card input::placeholder{color:#ffffff6b;font-weight:700}.auth-card input:focus{outline:none;border-color:#b49bff;box-shadow:0 0 0 4px #b49bff40}.auth-card button{width:100%;margin-top:16px;padding:16px;font-size:1.05rem;font-weight:800;border-radius:14px;color:#fff;min-height:56px;background:var(--gloss-overlay),linear-gradient(135deg,#8b5cf6,#6d4efc);box-shadow:0 16px 32px -10px #7c5cf6cc,inset 0 1px #fff6}.auth-card button:disabled{opacity:.5;box-shadow:none}.auth-card button:not(:disabled):hover{filter:brightness(1.06)}.auth-card .hint{text-align:center;color:#fff9;font-size:.82rem;margin:14px 0 0}.auth-card .hint b{color:#cabcff}.auth-card .hint a{color:#cabcff;font-weight:700;text-decoration:none;cursor:pointer}.pending-note{margin:8px 0 2px;padding:9px 13px;border-radius:12px;background:#ffffff21;border:1px solid rgba(255,255,255,.22);color:#ffffffeb;font-size:.82rem;font-weight:600;line-height:1.4}.class-list{display:flex;flex-direction:column;gap:8px}.auth-card .class-row{width:100%;margin:0;min-height:56px;padding:12px 14px;border-radius:13px;display:flex;align-items:center;justify-content:space-between;gap:10px;text-align:left;color:#fff;background:#ffffff1a;border:1px solid rgba(255,255,255,.22);box-shadow:none;font-size:.95rem}.auth-card .class-row span{display:flex;flex-direction:column}.auth-card .class-row small{color:#fff9;font-size:.76rem;font-weight:600;margin-top:2px}.auth-card .class-row .chev{color:#ffffff8c;font-size:1.3rem}.auth-card .class-row:active{transform:scale(.985)}.auth-card .join-code{font:800 1.7rem/1 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.22em;text-align:center;color:#fff;padding:16px 10px;border-radius:14px;background:#ffffff1f;border:1px dashed rgba(255,255,255,.4)}.class-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(84px,1fr));gap:10px}.auth-card .class-chip{width:auto;margin:0;min-height:74px;padding:10px 6px;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;color:#fff;background:#ffffff1a;border:1px solid rgba(255,255,255,.22);box-shadow:inset 0 1px #ffffff2e;transition:transform .12s ease,background .12s ease}.auth-card .class-chip b{font-size:1.5rem;font-weight:800;line-height:1}.auth-card .class-chip span{font-size:.68rem;font-weight:600;color:#ffffff9e}.auth-card .class-chip:not(:disabled):active{transform:scale(.96)}.auth-card .class-chip:not(:disabled):hover{background:#ffffff2e}.auth-card .err{color:#ff9a8a;text-align:center;margin-top:10px;font-weight:600}.auth-feats{display:flex;gap:10px;margin-top:22px}.feat{display:flex;flex-direction:column;align-items:center;gap:4px;color:#ffffffd1;font-size:.72rem;font-weight:700;background:#ffffff0f;border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:10px 16px}.feat b{font-size:1.15rem;font-weight:400}.brand{text-align:center}.logo{font-size:40px;width:84px;height:84px;margin:0 auto 16px;display:grid;place-items:center;border-radius:24px;background:var(--grad-brand);box-shadow:0 12px 26px -10px var(--brand)}.brand h1{margin:0 0 4px;font-size:2.4rem;font-weight:800;letter-spacing:-.03em}.brand h1 span{color:var(--brand)}.tag{margin:0;color:var(--muted);font-weight:500}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px;width:100%;box-shadow:var(--sh-lg)}.login label{display:block;font-weight:700;margin-bottom:10px}.login input{width:100%;font-size:1.3rem;font-weight:700;letter-spacing:.18em;text-align:center;padding:16px;border:2px solid var(--line-2);border-radius:var(--r-md);text-transform:uppercase;background:var(--surface-2);color:var(--ink)}.login input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-050)}.login button{width:100%;margin-top:16px;padding:16px;font-size:1.05rem;font-weight:700;border-radius:var(--r-md);color:#fff;background:var(--grad-brand);box-shadow:0 12px 24px -10px var(--brand);min-height:52px}.login button:disabled{opacity:.5;box-shadow:none}.hint{text-align:center;color:var(--muted);font-size:.85rem;margin:14px 0 0}.hint b{color:var(--brand-deep)}.err{color:var(--coral);font-size:.9rem;margin-top:10px;text-align:center;font-weight:600}.home{flex:1;display:flex;flex-direction:column;min-height:0;background:var(--bg)}.home-scroll{flex:1;overflow-y:auto;padding-bottom:calc(96px + env(safe-area-inset-bottom))}.hero{background:var(--hero-grad);color:#fff;padding:calc(18px + env(safe-area-inset-top)) 20px 22px;border-radius:0 0 28px 28px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(139,92,246,.35),transparent 70%);top:-120px;right:-60px}.hero-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;position:relative}.hero-lang{border:1px solid rgba(255,255,255,.16);background:#ffffff1a;color:#fff;border-radius:100px;padding:9px 14px;font-size:.85rem;font-weight:700;font-family:var(--font);min-height:40px;-moz-appearance:none;appearance:none;-webkit-appearance:none}.hero-lang option{color:#000}.hero-right{display:flex;align-items:center;gap:12px}.bell{position:relative;width:44px;height:44px;border-radius:50%;background:#ffffff1a;color:#fff;display:grid;place-items:center;font-size:1.1rem}.bell .dot{position:absolute;top:10px;right:11px;width:8px;height:8px;background:#ff4d6d;border-radius:50%;border:2px solid #201d47}.avatar{width:46px;height:46px;border-radius:50%;background:var(--grad-brand);display:grid;place-items:center;font-size:1.3rem;border:2px solid rgba(255,255,255,.25)}.greet{font-size:.98rem;opacity:.9;font-weight:500;position:relative}.hero-title{font-size:1.7rem;font-weight:800;margin:4px 0 18px;line-height:1.15;letter-spacing:-.02em;position:relative}.hero-title span{color:#b49bff}.search{position:relative;margin-bottom:14px}.search input{width:100%;padding:15px 46px;border-radius:100px;border:1px solid rgba(255,255,255,.14);background:#ffffff1a;color:#fff;font-size:1rem;min-height:52px}.search input::placeholder{color:#fff9}.search input:focus{outline:none;border-color:#b49bffb3;background:#ffffff24}.search .si{position:absolute;left:16px;top:50%;transform:translateY(-50%);opacity:.75}.search .mic{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:36px;height:36px;border-radius:50%;background:transparent;color:#fffc;font-size:1rem}.search .mic.on{background:var(--coral);color:#fff;animation:pulse 1s infinite}@keyframes pulse{0%,to{transform:translateY(-50%) scale(1)}50%{transform:translateY(-50%) scale(1.12)}}.subj-tabs{display:flex;gap:12px}.subj{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:13px;border-radius:100px;font-weight:700;font-size:1rem;background:#ffffff14;color:#ffffffbf;border:1px solid rgba(255,255,255,.12);min-height:50px}.subj.on{background:var(--grad-brand);color:#fff;border-color:transparent;box-shadow:0 10px 22px -10px var(--brand)}.body{padding:18px 16px 0}.conti{display:flex;align-items:center;gap:14px;background:linear-gradient(135deg,var(--brand-050),var(--surface));border:1px solid var(--brand-100);border-radius:var(--r);padding:16px;box-shadow:var(--sh);margin-bottom:22px;position:relative;overflow:hidden}.conti-badge{flex:none;width:66px;height:74px;border-radius:var(--r-md);background:var(--grad-brand);color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 10px 20px -8px var(--brand)}.conti-badge .ch{font-size:.62rem;font-weight:700;letter-spacing:.1em;opacity:.9}.conti-badge .no{font-size:1.7rem;font-weight:800;line-height:1}.conti-main{flex:1;min-width:0}.conti-label{color:var(--brand);font-weight:700;font-size:.78rem}.conti-title{font-weight:800;font-size:1.1rem;margin:1px 0}.conti-sub{color:var(--muted);font-size:.82rem}.conti-bar{height:7px;border-radius:100px;background:var(--brand-100);margin:10px 0 5px;overflow:hidden}.conti-bar i{display:block;height:100%;border-radius:100px;background:var(--grad-brand)}.conti-pct{font-size:.74rem;color:var(--muted);font-weight:600}.conti-pct b{color:var(--brand-deep)}.conti-go{margin-top:10px;display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:100px;background:var(--grad-brand);color:#fff;font-weight:700;font-size:.85rem;box-shadow:0 10px 20px -10px var(--brand)}.sec-title{font-size:1.15rem;font-weight:800;margin:0 0 14px;letter-spacing:-.02em;display:inline-block}.sec-title:after{content:"";display:block;width:34px;height:3px;border-radius:3px;background:var(--grad-brand);margin-top:5px}.chapters{display:flex;flex-direction:column;gap:14px}.chap{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--sh)}.chap:active{transform:scale(.995)}.chap-top{display:flex;gap:13px;align-items:flex-start}.chap-badge{flex:none;width:58px;height:62px;border-radius:var(--r-md);background:linear-gradient(140deg,var(--c),var(--c2));color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 8px 18px -8px var(--c2)}.chap-badge .ch{font-size:.58rem;font-weight:700;letter-spacing:.1em;opacity:.9}.chap-badge .no{font-size:1.5rem;font-weight:800;line-height:1}.chap-main{flex:1;min-width:0}.chap-title{font-weight:800;font-size:1.05rem;line-height:1.25}.chap-desc{color:var(--muted);font-size:.84rem;margin-top:3px;line-height:1.4}.chap-right{flex:none;display:flex;flex-direction:column;align-items:center;gap:8px}.chev{color:var(--faint);font-size:1.5rem;line-height:1}.ring{position:relative;width:54px;height:54px;display:grid;place-items:center}.ring svg{position:absolute;top:0;right:0;bottom:0;left:0}.ring-pct{font-size:.72rem;font-weight:800}.ring-label{font-size:.62rem;color:var(--muted);font-weight:600;text-align:center}.chap-bottom{display:flex;align-items:center;gap:12px;margin-top:14px}.lessons-block{flex:0 0 72px}.lessons-count{font-size:.68rem;color:var(--muted);font-weight:700;margin-bottom:5px;white-space:nowrap}.lbar{height:6px;border-radius:100px;background:var(--surface-2);overflow:hidden}.lbar i{display:block;height:100%;border-radius:100px;background:linear-gradient(90deg,var(--c),var(--c2))}.chap-actions{flex:1;min-width:0;display:flex;align-items:center;gap:6px}.pill{flex:1;min-width:0;height:44px;display:inline-flex;align-items:center;justify-content:center;gap:5px;padding:0 5px;border-radius:15px;font-weight:700;font-size:.78rem;line-height:1;white-space:nowrap;box-shadow:var(--sh-sm)}.pill svg{flex:none}.pill.learn{background:var(--cs);color:var(--c2)}.pill.ask{background:var(--ask-050);color:var(--ask)}.pill.quiz{background:var(--quiz-050);color:var(--quiz)}.pill:active{transform:scale(.95)}.tabbar{position:absolute;left:0;right:0;bottom:0;display:flex;align-items:flex-end;justify-content:space-around;background:var(--surface);border-top:1px solid var(--line);padding:8px 8px calc(8px + env(safe-area-inset-bottom));box-shadow:0 -8px 24px -18px #1818324d}.tab-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;background:transparent;color:var(--faint);font-size:.68rem;font-weight:600;padding:6px 0}.tab-item .ti{font-size:1.25rem;line-height:1}.tab-item.on{color:var(--brand)}.fab{flex:none;width:64px;margin:0 4px;display:flex;flex-direction:column;align-items:center;gap:3px;background:transparent;color:var(--brand);font-size:.68rem;font-weight:700}.fab .fab-circle{width:56px;height:56px;border-radius:50%;background:var(--grad-brand);color:#fff;display:grid;place-items:center;font-size:1.5rem;margin-top:-26px;box-shadow:0 12px 24px -8px var(--brand);border:4px solid var(--surface);overflow:hidden}.fab .fab-circle img{width:100%;height:100%;object-fit:cover}.chap-bk{background:transparent;font-size:1.05rem;padding:2px 4px;opacity:.35;filter:grayscale(1);line-height:1}.chap-bk.on{opacity:1;filter:none}.stats{display:flex;gap:10px;margin-bottom:18px}.stat{flex:1;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:14px 8px;text-align:center;box-shadow:var(--sh-sm)}.stat b{display:block;font-size:1.5rem;font-weight:800;color:var(--brand-deep);letter-spacing:-.02em}.stat span{font-size:.72rem;color:var(--muted);font-weight:700}.rows{display:flex;flex-direction:column;gap:10px}.row-card{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:12px;box-shadow:var(--sh-sm)}.row-main{flex:1;min-width:0;display:flex;align-items:center;gap:12px;background:transparent;text-align:left;padding:0}.row-badge{flex:none;width:40px;height:40px;border-radius:11px;background:linear-gradient(140deg,var(--c),var(--c2));color:#fff;font-weight:800;font-size:.9rem;display:grid;place-items:center}.row-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}.row-title{font-weight:700;font-size:.95rem;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.row-sub{font-size:.72rem;color:var(--muted);font-weight:600}.row-bk{background:transparent;font-size:1.05rem;padding:6px}.prof-card{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--sh);margin-bottom:16px}.prof-avatar{width:56px;height:56px;border-radius:50%;background:var(--grad-brand);display:grid;place-items:center;font-size:1.6rem}.prof-name{font-weight:800;font-size:1.15rem}.prof-sub{color:var(--muted);font-size:.85rem;font-weight:600}.prof-group{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;margin-bottom:16px;box-shadow:var(--sh-sm)}.prof-row{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line);font-weight:600;font-size:.95rem;color:var(--ink);min-height:52px;text-decoration:none}.prof-row:last-child{border-bottom:none}.prof-row.link{color:var(--brand-deep)}.prof-row .chev{color:var(--faint);font-size:1.3rem}.prof-val{color:var(--muted);font-weight:600}.prof-select{border:1px solid var(--line-2);border-radius:100px;padding:7px 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