:root{--accent: #6c5ce7;--accent-glow: rgba(108, 92, 231, .35);--success: #00b894;--success-glow: rgba(0, 184, 148, .25);--danger: #ff6b6b;--danger-glow: rgba(255, 107, 107, .25);--warning: #fdcb6e;--surface: rgba(255, 255, 255, .04);--surface-hover: rgba(255, 255, 255, .07);--border: rgba(255, 255, 255, .08);--text: #f0f0f0;--text-dim: rgba(255, 255, 255, .5);--radius: .75rem;--radius-sm: .5rem}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#0b0b14;color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}.shell{min-height:100vh;display:flex;justify-content:center;padding:1.5rem}.lobby{width:100%;max-width:540px;display:flex;flex-direction:column;gap:1.25rem;padding:2rem 0;animation:fadeUp .4s ease}@keyframes fadeUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.lobby-header{text-align:center;margin-bottom:.5rem}.logo-icon{font-size:2.5rem;margin-bottom:.5rem}h1{margin:0;font-size:2rem;font-weight:800;letter-spacing:-.03em;background:linear-gradient(135deg,#a29bfe,#6c5ce7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{margin:.35rem 0 0;color:var(--text-dim);font-size:.95rem}.lobby-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem}.lobby-card h2{margin:0 0 1rem;font-size:.85rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-dim);font-weight:600}.player-inputs{display:flex;align-items:center;gap:.75rem}.input-group{flex:1;display:flex;flex-direction:column;gap:.35rem}.input-group label{font-size:.8rem;font-weight:600;color:var(--text-dim);text-transform:uppercase;letter-spacing:.05em}.input-group input{background:#ffffff0f;border:1px solid var(--border);border-radius:var(--radius-sm);padding:.65rem .85rem;color:var(--text);font-size:.95rem;font-family:inherit;outline:none;transition:border-color .2s,box-shadow .2s}.input-group input::placeholder{color:#ffffff40}.input-group input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.vs-badge{font-weight:800;font-size:1.1rem;color:var(--accent);padding-top:1.4rem;flex-shrink:0}.subject-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(90px,1fr));gap:.5rem}.subject-btn{display:flex;flex-direction:column;align-items:center;gap:.35rem;padding:.75rem .5rem;border-radius:var(--radius-sm);border:1px solid var(--border);background:transparent;color:var(--text-dim);cursor:pointer;font-size:.8rem;font-weight:600;font-family:inherit;transition:all .2s}.subject-btn:hover{background:var(--surface-hover);color:var(--text)}.subject-btn.active{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 0 20px var(--accent-glow)}.subject-icon{font-size:1.4rem}.rounds-selector{display:flex;gap:.5rem}.round-btn{flex:1;padding:.65rem;border-radius:var(--radius-sm);border:1px solid var(--border);background:transparent;color:var(--text-dim);font-size:1rem;font-weight:700;font-family:inherit;cursor:pointer;transition:all .2s}.round-btn:hover{background:var(--surface-hover);color:var(--text)}.round-btn.active{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 0 20px var(--accent-glow)}.start-btn{width:100%;padding:1rem;border:none;border-radius:var(--radius);background:linear-gradient(135deg,#6c5ce7,#a29bfe);color:#fff;font-size:1.1rem;font-weight:700;font-family:inherit;cursor:pointer;transition:transform .15s,box-shadow .2s;box-shadow:0 4px 24px var(--accent-glow);letter-spacing:.02em}.start-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 32px var(--accent-glow)}.start-btn:active:not(:disabled){transform:translateY(0)}.start-btn:disabled{opacity:.4;cursor:not-allowed}.secondary-btn{padding:.85rem 2rem;border:1px solid var(--border);border-radius:var(--radius);background:transparent;color:var(--text-dim);font-size:1rem;font-weight:600;font-family:inherit;cursor:pointer;transition:all .2s}.secondary-btn:hover{background:var(--surface-hover);color:var(--text);border-color:#ffffff26}.battle{width:100%;max-width:640px;display:flex;flex-direction:column;gap:1.25rem;padding:1rem 0 2rem;animation:fadeUp .3s ease}.battle-top{display:flex;flex-direction:column;gap:.75rem}.player-indicator{display:flex;align-items:center;justify-content:space-between;gap:.5rem}.player-tag{display:flex;align-items:center;gap:.5rem;padding:.45rem .75rem;border-radius:var(--radius-sm);border:1px solid var(--border);font-weight:700;font-size:.85rem;transition:all .3s;opacity:.5}.player-tag.active{opacity:1;border-color:var(--accent);box-shadow:0 0 16px var(--accent-glow)}.turn-label{font-size:.75rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.1em;font-weight:600}.score-badge{display:flex;align-items:center;gap:.3rem;font-size:.8rem}.score-value{font-weight:800;color:var(--accent)}.score-label{color:var(--text-dim);font-size:.7rem}.streak-fire{font-size:.7rem;margin-left:.25rem;animation:pulse .8s ease infinite alternate}@keyframes pulse{0%{opacity:.7}to{opacity:1}}.progress-bar{width:100%;height:4px;background:var(--border);border-radius:2px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),#a29bfe);border-radius:2px;transition:width .4s ease}.question-counter{text-align:center;font-size:.8rem;color:var(--text-dim);font-weight:600}.question-area{display:flex;flex-direction:column;gap:1.25rem}.question-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;text-align:center}.question-card h2{margin:0;font-size:1.15rem;font-weight:700;line-height:1.5}.timer-and-options{display:flex;flex-direction:column;align-items:center;gap:1.25rem}.timer-container{height:56px;display:flex;align-items:center;justify-content:center}.timer-ring{position:relative;width:56px;height:56px}.timer-ring svg{width:100%;height:100%;transform:rotate(-90deg)}.timer-bg{fill:none;stroke:var(--border);stroke-width:2.5}.timer-fg{fill:none;stroke-width:2.5;stroke-linecap:round;transition:stroke-dasharray 1s linear}.timer-text{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:800}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:.65rem;width:100%}@media(max-width:500px){.options-grid{grid-template-columns:1fr}}.option-btn{display:flex;align-items:center;gap:.75rem;padding:.85rem 1rem;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:.95rem;font-family:inherit;cursor:pointer;transition:all .2s;text-align:left}.option-btn:hover:not(:disabled){background:var(--surface-hover);border-color:#ffffff26;transform:translateY(-1px)}.option-btn.selected{border-color:var(--accent);background:#6c5ce726;box-shadow:0 0 16px var(--accent-glow)}.option-btn.correct{border-color:var(--success);background:#00b89426;box-shadow:0 0 16px var(--success-glow)}.option-btn.wrong{border-color:var(--danger);background:#ff6b6b26;box-shadow:0 0 16px var(--danger-glow)}.option-btn.dimmed{opacity:.35}.option-letter{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:#ffffff14;font-weight:700;font-size:.8rem;flex-shrink:0}.option-btn.correct .option-letter{background:var(--success);color:#fff}.option-btn.wrong .option-letter{background:var(--danger);color:#fff}.result-banner{display:flex;align-items:flex-start;gap:.75rem;padding:1rem 1.25rem;border-radius:var(--radius-sm);animation:fadeUp .3s ease}.result-banner.success{background:#00b8941a;border:1px solid rgba(0,184,148,.25)}.result-banner.fail{background:#ff6b6b1a;border:1px solid rgba(255,107,107,.25)}.result-icon{font-size:1.3rem;flex-shrink:0}.result-banner strong{font-size:1rem}.explanation{margin:.25rem 0 0;font-size:.85rem;color:var(--text-dim);line-height:1.5}.results{width:100%;max-width:600px;display:flex;flex-direction:column;gap:1.5rem;padding:2rem 0;animation:fadeUp .4s ease}.results-header{text-align:center}.trophy{font-size:3rem;margin-bottom:.5rem;animation:bounce .6s ease}@keyframes bounce{0%{transform:scale(.5);opacity:0}60%{transform:scale(1.15)}to{transform:scale(1);opacity:1}}.results-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}@media(max-width:500px){.results-grid{grid-template-columns:1fr}}.result-player-card{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-align:center}.result-player-card.winner{border-color:var(--accent);box-shadow:0 0 24px var(--accent-glow)}.crown{position:absolute;top:-.75rem;left:50%;transform:translate(-50%);font-size:1.5rem}.result-player-card h2{margin:.5rem 0 1rem;font-size:1.15rem}.stat-row{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.stat{display:flex;flex-direction:column;gap:.15rem}.stat-value{font-size:1.3rem;font-weight:800;color:var(--accent)}.stat-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);font-weight:600}.breakdown{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem}.breakdown h3{margin:0 0 1rem;font-size:.85rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-dim);font-weight:600}.breakdown-table{display:flex;flex-direction:column;gap:.35rem}.breakdown-header,.breakdown-row{display:grid;grid-template-columns:2rem 1fr 1fr;gap:.5rem;align-items:center;padding:.4rem 0;font-size:.85rem}.breakdown-header{color:var(--text-dim);font-weight:600;font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border);padding-bottom:.6rem;margin-bottom:.2rem}.breakdown-row{border-bottom:1px solid rgba(255,255,255,.03)}.breakdown-row:last-child{border-bottom:none}.bd-correct{color:var(--success);font-weight:700}.bd-wrong{color:var(--danger);font-weight:700}.breakdown-row small{color:var(--text-dim);font-weight:400}.results-actions{display:flex;gap:.75rem}.results-actions .start-btn{flex:1}