*,:before,:after{box-sizing:border-box}:root{--primary:#6366f1;--primary-dark:#4f46e5;--primary-light:#818cf8;--accent:#ec4899;--accent-dark:#db2777;--background:#fff;--surface:#f9fafb;--surface-hover:#f3f4f6;--border:#e5e7eb;--text-primary:#111827;--text-secondary:#6b7280;--success:#10b981;--warning:#f59e0b}body{-webkit-font-smoothing:antialiased;background:var(--surface);color:var(--text-primary);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.screen{flex-direction:column;min-height:100vh;display:flex}.header{background:var(--primary);color:#fff;padding:1rem 1.5rem;box-shadow:0 2px 4px #0000001a}.header h1{margin:0;font-size:1.5rem;font-weight:600}.game-container{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:2rem;padding:2rem 1rem;display:flex}.score-board{background:var(--background);border:2px solid var(--border);border-radius:12px;width:100%;max-width:400px;padding:1.5rem;box-shadow:0 1px 3px #0000001a}.score-title{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;margin:0 0 1rem;font-size:.875rem;font-weight:600}.score-grid{grid-template-columns:repeat(3,1fr);gap:1rem;display:grid}.score-item{text-align:center}.score-label{color:var(--text-secondary);margin-bottom:.25rem;font-size:.75rem;font-weight:500}.score-value{margin:0;font-size:2rem;font-weight:700}.score-value.player{color:var(--primary)}.score-value.computer{color:var(--accent)}.score-value.draw{color:var(--text-secondary)}.game-board-wrapper{flex-direction:column;align-items:center;gap:1.5rem;width:100%;max-width:400px;display:flex}.status-message{text-align:center;justify-content:center;align-items:center;min-height:2rem;font-size:1.25rem;font-weight:600;display:flex}.status-message.turn-x{color:var(--primary)}.status-message.turn-o{color:var(--accent)}.status-message.winner{color:var(--success);font-size:1.5rem}.status-message.draw{color:var(--warning)}.board{aspect-ratio:1;background:var(--border);border-radius:12px;grid-template-columns:repeat(3,1fr);gap:.5rem;width:100%;padding:.5rem;display:grid;box-shadow:0 4px 6px #0000001a}.cell{background:var(--background);cursor:pointer;color:var(--text-primary);-webkit-user-select:none;user-select:none;border:none;border-radius:8px;justify-content:center;align-items:center;font-size:3rem;font-weight:700;transition:all .2s;display:flex}.cell:hover:not(:disabled){background:var(--surface-hover);transform:scale(1.05)}.cell:active:not(:disabled){transform:scale(.95)}.cell:disabled{cursor:not-allowed}.cell.x{color:var(--primary)}.cell.o{color:var(--accent)}.cell.winning{background:var(--success);color:#fff;animation:.6s ease-in-out pulse}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.controls{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.button{cursor:pointer;border:none;border-radius:8px;padding:.75rem 1.5rem;font-family:inherit;font-size:1rem;font-weight:600;transition:all .2s}.button-primary{background:var(--primary);color:#fff}.button-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 6px #6366f140}.button-primary:active{transform:translateY(0)}.button-secondary{background:var(--surface);color:var(--text-primary);border:2px solid var(--border)}.button-secondary:hover{background:var(--surface-hover);border-color:var(--primary)}.button-danger{background:var(--accent);color:#fff}.button-danger:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:0 4px 6px #ec489940}.button-danger:active{transform:translateY(0)}@media (width<=480px){.game-container{gap:1.5rem;padding:1rem .5rem}.cell{font-size:2rem}.score-board{padding:1rem}.score-value{font-size:1.5rem}}