*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#010102;--card:#0f1011;--surface2:#141516;--accent:#5e6ad2;--accent-h:#828fff;--focus:#5e6ad273;--success:#27a644;--danger:#eb5757;--warning:#d9a441;--text:#f7f8f8;--text2:#8a8f98;--border:#23252a;--border-strong:#34343a;--radius:12px;--sm:8px}body{background:var(--bg);color:var(--text);letter-spacing:-.011em;-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Segoe UI,Roboto,system-ui,sans-serif;font-size:16px;line-height:1.5}a{color:inherit;text-decoration:none}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.container{max-width:800px;margin:0 auto;padding:0 16px 64px}nav{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:100;background:#010102b8;position:sticky;top:0}.nav-inner{align-items:center;gap:8px;max-width:800px;height:56px;margin:0 auto;padding:0 16px;display:flex}.nav-brand{letter-spacing:-.02em;cursor:pointer;color:var(--text);margin-right:auto;font-size:1.05rem;font-weight:600}.nav-link{border-radius:var(--sm);color:var(--text2);cursor:pointer;padding:6px 12px;font-size:.875rem;font-weight:500;transition:background .12s,color .12s}.nav-link:hover,.nav-link.active{background:var(--surface2);color:var(--text)}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:inset 0 1px #ffffff05}.btn{border-radius:var(--sm);cursor:pointer;letter-spacing:0;border:1px solid #0000;justify-content:center;align-items:center;gap:6px;padding:9px 18px;font-size:.875rem;font-weight:500;line-height:1.2;transition:background .12s,border-color .12s,transform 80ms,color 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16px;font-size:.9rem}.alert-error{color:#f2777a;background:#eb57571f;border-color:#eb57574d}.alert-success{color:#4fc06c;background:#27a6441f;border-color:#27a6444d}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:36px;height:36px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.center{justify-content:center;align-items:center;padding:60px;display:flex}.quiz-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;align-items:flex-start;gap:16px;margin-bottom:12px;padding:20px;transition:border-color .15s,background .15s,transform .1s;display:flex}.quiz-card:hover{background:var(--surface2);border-color:var(--border-strong);transform:translateY(-1px)}.quiz-icon{flex-shrink:0;font-size:2rem}.quiz-info{flex:1}.quiz-title{letter-spacing:-.02em;color:var(--text);margin-bottom:6px;font-size:1.05rem;font-weight:600}.quiz-meta{color:var(--text2);flex-wrap:wrap;gap:12px;font-size:.82rem;display:flex}.progress-bg{background:var(--border);border-radius:99px;height:6px}.progress-fill{background:var(--accent);border-radius:99px;height:100%;transition:width .3s}.timer{font-variant-numeric:tabular-nums;border-radius:var(--sm);background:var(--card);border:1px solid var(--border);color:var(--text);padding:5px 14px;font-size:1.3rem;font-weight:600}.timer.warning{color:var(--warning);background:#d9a4411a;border-color:#d9a44180}.timer.danger{color:#f2777a;background:#eb57571a;border-color:#eb575780}.option{border-radius:var(--sm);border:1px solid var(--border);cursor:pointer;-webkit-user-select:none;user-select:none;color:var(--text);align-items:center;gap:12px;margin-bottom:10px;padding:12px 16px;font-size:.95rem;transition:border-color .12s,background .12s;display:flex}.option:hover{border-color:var(--border-strong);background:#5e6ad214}.option.selected{border-color:var(--accent);background:#5e6ad226}.option.correct{border-color:var(--success);background:#27a64426}.option.wrong{border-color:var(--danger);background:#eb575726}.option-letter{background:var(--surface2);border:1px solid var(--border);width:28px;height:28px;color:var(--text2);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.78rem;font-weight:600;transition:all .12s;display:flex}.option.selected .option-letter{background:var(--accent);color:#fff;border-color:var(--accent)}.option.correct .option-letter{background:var(--success);color:#fff;border-color:var(--success)}.option.wrong .option-letter{background:var(--danger);color:#fff;border-color:var(--danger)}.score-circle{border:6px solid var(--accent);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:120px;height:120px;margin:0 auto 24px;display:flex}.score-num{letter-spacing:-.03em;color:var(--text);font-size:2.2rem;font-weight:700}.score-deno{color:var(--text2);font-size:.85rem}.lb-row{border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:12px 0;display:flex}.lb-rank{text-align:center;width:32px;color:var(--text2);font-size:1rem;font-weight:600}.lb-name{color:var(--text);flex:1;font-weight:500}.lb-score{color:var(--accent-h);font-weight:600}.lb-time{color:var(--text2);text-align:right;width:60px;font-size:.82rem}.tab-bar{border-bottom:1px solid var(--border);margin-bottom:24px;display:flex}.tab-item{cursor:pointer;color:var(--text2);border-bottom:2px solid #0000;margin-bottom:-1px;padding:10px 20px;font-size:.9rem;transition:color .12s}.tab-item:hover{color:var(--text)}.tab-item.active{color:var(--text);border-bottom-color:var(--accent);font-weight:500}