*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0d0d0f;--surface: #16161a;--surface2: #1e1e24;--border: #2a2a32;--text: #eeedf0;--text-soft: #a8a6b0;--text-muted: #5c5a66;--correct: #22c97a;--correct-dim: rgba(34, 201, 122, .12);--incorrect: #f04f4f;--incorrect-dim: rgba(240, 79, 79, .12);--font-display: "Anybody", sans-serif;--font-body: "Chivo", sans-serif;--header-h: 58px;--status-h: 30px}html,body,#root{height:100%}body{background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:15px}@media (max-width: 600px){html,body,#root{height:auto;min-height:100%}.app{height:auto;min-height:100vh;overflow-y:auto}.study-main{overflow-y:auto;padding-bottom:40px}.home-grid{overflow-y:visible}}.app{display:flex;flex-direction:column;height:100vh}.header{height:var(--header-h);background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;flex-shrink:0}.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-size:20px;font-weight:700;letter-spacing:-.02em;color:var(--text)}.logo-icon{background:var(--text);color:var(--bg);font-size:12px;font-weight:800;padding:4px 7px;border-radius:6px;letter-spacing:.02em}.header-sub{font-size:13px;color:var(--text-muted)}.back-btn{background:none;border:1px solid var(--border);color:var(--text-soft);font-family:var(--font-body);font-size:13px;font-weight:500;padding:6px 14px;border-radius:8px;cursor:pointer;transition:all .15s}.back-btn:hover{border-color:var(--text-soft);color:var(--text)}.study-title{font-family:var(--font-display);font-size:15px;font-weight:700;color:var(--text)}.card-counter{font-size:13px;font-weight:600;color:var(--text-muted);background:var(--surface2);border:1px solid var(--border);padding:4px 12px;border-radius:99px}.score-bar{display:flex;align-items:center;gap:12px;padding:8px 24px;background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0}.score-correct{font-size:12px;font-weight:700;color:var(--correct);min-width:36px}.score-incorrect{font-size:12px;font-weight:700;color:var(--incorrect);min-width:36px;text-align:right}.score-track{flex:1;height:6px;background:var(--surface2);border-radius:99px;overflow:hidden}.score-fill{height:100%;background:var(--correct);border-radius:99px;transition:width .4s ease}.home-grid{flex:1;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;padding:32px 24px;overflow-y:auto;align-content:start}.home-grid::-webkit-scrollbar{width:6px}.home-grid::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.deck-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:28px 24px;cursor:pointer;text-align:left;display:flex;flex-direction:column;gap:8px;position:relative;overflow:hidden;animation:deckIn .35s ease both;transition:transform .2s,box-shadow .2s,border-color .2s}@keyframes deckIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.deck-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--deck-color)}.deck-card:hover{transform:translateY(-3px);box-shadow:0 12px 40px #0000004d;border-color:var(--deck-color)}.deck-emoji{font-size:32px;line-height:1;margin-bottom:4px}.deck-name{font-family:var(--font-display);font-size:17px;font-weight:700;color:var(--text);letter-spacing:-.01em}.deck-meta{display:flex;align-items:center;gap:8px}.deck-count{font-size:12px;color:var(--text-muted);font-weight:500}.deck-mode-badge{font-size:10px;font-weight:700;letter-spacing:.08em;color:var(--deck-color);background:color-mix(in srgb,var(--deck-color) 15%,transparent);border:1px solid color-mix(in srgb,var(--deck-color) 40%,transparent);padding:1px 7px;border-radius:4px}.deck-arrow{position:absolute;bottom:24px;right:24px;font-size:18px;color:var(--deck-color);opacity:0;transform:translate(-6px);transition:opacity .2s,transform .2s}.deck-card:hover .deck-arrow{opacity:1;transform:translate(0)}.study-main{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;padding:24px;overflow:hidden}.study-main-mcq{justify-content:flex-start;padding-top:28px;overflow-y:auto}.study-main-mcq::-webkit-scrollbar{width:6px}.study-main-mcq::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.progress-dots{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;max-width:560px;flex-shrink:0}.dot{width:8px;height:8px;border-radius:50%;transition:background .3s}.dot-future{background:var(--surface2)}.dot-active{background:var(--text);width:20px;border-radius:4px}.dot-past{background:var(--correct)}.card-scene{width:100%;max-width:560px;height:260px;perspective:1000px;transition:filter .3s;flex-shrink:0}.card-scene.card-correct{filter:drop-shadow(0 0 20px rgba(34,201,122,.35))}.card-scene.card-incorrect{filter:drop-shadow(0 0 20px rgba(240,79,79,.35))}.card-inner{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.4,0,.2,1)}.card-inner.flipped{transform:rotateY(180deg)}.card-face{position:absolute;top:0;right:0;bottom:0;left:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:18px;border:1px solid var(--border);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 36px;gap:14px;text-align:center}.card-front{background:var(--surface)}.card-back{background:var(--surface2);transform:rotateY(180deg);border-color:var(--deck-color, var(--border))}.card-face-label{font-size:10px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--text-muted);position:absolute;top:18px;left:24px}.card-back .card-face-label{color:var(--deck-color, var(--text-muted))}.card-text{font-size:18px;font-weight:500;color:var(--text);line-height:1.5;max-width:440px}.flip-hint{position:absolute;bottom:16px;font-size:11px;color:var(--text-muted);letter-spacing:.05em}.mark-row{display:flex;gap:12px}.mark-btn{font-family:var(--font-display);font-size:14px;font-weight:700;padding:12px 32px;border-radius:10px;border:2px solid transparent;cursor:pointer;transition:all .15s}.mark-incorrect{background:var(--incorrect-dim);color:var(--incorrect);border-color:var(--incorrect)}.mark-incorrect:hover{background:var(--incorrect);color:#fff}.mark-correct{background:var(--correct-dim);color:var(--correct);border-color:var(--correct)}.mark-correct:hover{background:var(--correct);color:var(--bg)}.next-btn{font-family:var(--font-display);font-size:14px;font-weight:700;padding:12px 40px;border-radius:10px;border:none;background:var(--text);color:var(--bg);cursor:pointer;transition:opacity .15s,transform .15s;flex-shrink:0}.next-btn:hover{opacity:.88;transform:translateY(-1px)}.study-hint{font-size:12px;color:var(--text-muted);letter-spacing:.05em}.mcq-question-box{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:28px 32px;width:100%;max-width:640px;display:flex;flex-direction:column;flex-shrink:0}.mcq-question-text{font-size:16px;font-weight:500;color:var(--text);line-height:1.6}.mcq-options{display:flex;flex-direction:column;gap:10px;width:100%;max-width:640px;flex-shrink:0}.mcq-option{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px 18px;cursor:pointer;display:flex;align-items:flex-start;gap:14px;text-align:left;transition:border-color .15s,background .15s;font-family:var(--font-body)}.mcq-option:hover:not(:disabled){border-color:var(--deck-color);background:var(--surface2)}.mcq-option:disabled{cursor:default}.option-correct{border-color:var(--correct)!important;background:var(--correct-dim)!important}.option-wrong{border-color:var(--incorrect)!important;background:var(--incorrect-dim)!important}.option-dim{opacity:.4}.option-letter{font-family:var(--font-display);font-size:12px;font-weight:800;color:var(--text-muted);background:var(--surface2);border:1px solid var(--border);width:26px;height:26px;border-radius:6px;display:grid;place-items:center;flex-shrink:0;margin-top:1px}.option-correct .option-letter{background:var(--correct);color:var(--bg);border-color:var(--correct)}.option-wrong .option-letter{background:var(--incorrect);color:#fff;border-color:var(--incorrect)}.option-text{font-size:14px;font-weight:400;color:var(--text-soft);line-height:1.55;flex:1}.option-correct .option-text{color:var(--text);font-weight:500}.option-wrong .option-text{color:var(--text)}.option-tick{color:var(--correct);font-weight:700;font-size:16px;margin-left:auto;align-self:center}.option-cross{color:var(--incorrect);font-weight:700;font-size:16px;margin-left:auto;align-self:center}.result-screen{flex:1;display:flex;align-items:center;justify-content:center;padding:24px}.result-card{background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:48px 52px;text-align:center;max-width:400px;width:100%;animation:resultIn .4s ease}@keyframes resultIn{0%{opacity:0;transform:scale(.94) translateY(16px)}to{opacity:1;transform:scale(1) translateY(0)}}.result-deck{font-size:13px;color:var(--text-muted);margin-bottom:12px}.result-grade{font-family:var(--font-display);font-size:36px;font-weight:800;color:var(--text);letter-spacing:-.03em;margin-bottom:20px}.result-pct{font-family:var(--font-display);font-size:72px;font-weight:800;color:var(--deck-color, var(--correct));letter-spacing:-.04em;line-height:1;margin-bottom:28px}.result-counts{display:flex;align-items:center;justify-content:center;gap:32px;margin-bottom:36px}.result-stat{display:flex;flex-direction:column;align-items:center;gap:4px}.result-stat-num{font-family:var(--font-display);font-size:32px;font-weight:800}.correct-stat .result-stat-num{color:var(--correct)}.incorrect-stat .result-stat-num{color:var(--incorrect)}.result-stat-label{font-size:12px;color:var(--text-muted);font-weight:500;text-transform:uppercase;letter-spacing:.08em}.result-divider{width:1px;height:48px;background:var(--border)}.result-actions{display:flex;flex-direction:column;gap:10px}.btn-retry{background:var(--incorrect-dim);border:1px solid var(--incorrect);color:var(--incorrect);font-family:var(--font-display);font-size:14px;font-weight:700;padding:11px 24px;border-radius:10px;cursor:pointer;transition:all .15s}.btn-retry:hover{background:var(--incorrect);color:#fff}.btn-restart{background:var(--surface2);border:1px solid var(--border);color:var(--text);font-family:var(--font-display);font-size:14px;font-weight:700;padding:11px 24px;border-radius:10px;cursor:pointer;transition:all .15s}.btn-restart:hover{border-color:var(--text-soft)}.btn-home{background:none;border:none;color:var(--text-muted);font-family:var(--font-body);font-size:13px;font-weight:500;padding:8px;cursor:pointer;transition:color .15s;text-decoration:underline;text-underline-offset:3px}.btn-home:hover{color:var(--text)}.statusbar{height:var(--status-h);background:var(--surface);border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;font-size:11px;color:var(--text-muted);flex-shrink:0}@media (max-width: 600px){.home-grid{grid-template-columns:1fr;padding:20px 16px}.card-scene{height:220px}.card-text{font-size:15px}.result-card{padding:36px 24px}.result-pct{font-size:56px}.mcq-question-box{padding:20px}.mcq-question-text{font-size:14px}.mcq-option{padding:12px 14px}.option-text{font-size:13px}.statusbar span:last-child{display:none}}