*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;display:flex;justify-content:center;align-items:center}.container{width:100%;max-width:500px;padding:20px}.card{background:#fff;border-radius:16px;box-shadow:0 10px 40px #0003;padding:24px;margin-bottom:20px}h1{text-align:center;color:#333;margin-bottom:20px;font-size:2rem}h2{color:#333;margin-bottom:16px;font-size:1.5rem}.btn{display:inline-block;padding:12px 24px;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;text-align:center}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-secondary{background:#f0f0f0;color:#333}.btn-success{background:linear-gradient(135deg,#11998e,#38ef7d);color:#fff}.btn-warning{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff}.btn-block{display:block;width:100%}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.input{width:100%;padding:12px 16px;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;transition:border-color .2s;margin-bottom:16px}.input:focus{outline:none;border-color:#667eea}.game-board{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:20px 0}.cell{aspect-ratio:1;display:flex;justify-content:center;align-items:center;font-size:3rem;font-weight:700;border:2px solid #e0e0e0;border-radius:12px;background:#f9f9f9;cursor:pointer;transition:all .2s ease}.cell:hover:not(.occupied){background:#f0f0f0;transform:scale(1.02)}.cell.occupied{cursor:default}.cell.x{color:#667eea}.cell.o{color:#f5576c}.status{text-align:center;font-size:1.25rem;font-weight:600;padding:16px;border-radius:8px;margin:16px 0}.status.waiting{background:#fff3cd;color:#856404}.status.playing{background:#d1ecf1;color:#0c5460}.status.winner{background:#d4edda;color:#155724}.status.draw{background:#e2e3e5;color:#383d41}.timer{text-align:center;font-size:2rem;font-weight:700;color:#f5576c;margin:16px 0}.timer.warning{animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.room-list{list-style:none}.room-item{padding:16px;border:2px solid #e0e0e0;border-radius:8px;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center}.room-info{flex:1}.room-info h3{margin-bottom:4px;color:#333}.room-info p{color:#666;font-size:.9rem}.badge{display:inline-block;padding:4px 8px;border-radius:4px;font-size:.75rem;font-weight:600;margin-right:8px}.badge-classic{background:#d1ecf1;color:#0c5460}.badge-timed{background:#fff3cd;color:#856404}.leaderboard-table{width:100%;border-collapse:collapse}.leaderboard-table th,.leaderboard-table td{padding:12px;text-align:left;border-bottom:1px solid #e0e0e0}.leaderboard-table th{background:#f9f9f9;font-weight:600;color:#333}.leaderboard-table tr:last-child td{border-bottom:none}.rank-1{background:linear-gradient(135deg,gold,#ffed4e)}.rank-2{background:linear-gradient(135deg,silver,#e8e8e8)}.rank-3{background:linear-gradient(135deg,#cd7f32,#daa06d)}.text-center{text-align:center}.mt-2{margin-top:16px}.mb-2{margin-bottom:16px}.flex-row{display:flex;gap:12px}.flex-row>*{flex:1}@media (max-width: 480px){.container{padding:12px}.card{padding:16px}h1{font-size:1.5rem}.cell{font-size:2.5rem}.flex-row{flex-direction:column}}