:root{--primary: #9E7FFF;--secondary: #38bdf8;--accent: #f472b6;--background: #171717;--surface: #262626;--text: #FFFFFF;--text-secondary: #A3A3A3;--border: #2F2F2F;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--radius: 16px;--radius-sm: 8px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--background);color:var(--text);min-height:100vh;display:flex;justify-content:center;align-items:center;padding:24px;line-height:1.5}#app{width:100%;max-width:480px}.game-header{text-align:center;margin-bottom:32px}.game-header h1{font-size:2.5rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.subtitle{color:var(--text-secondary);font-size:1rem;font-weight:500}.game-container{display:flex;flex-direction:column;gap:24px}.scoreboard{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.score-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 12px;text-align:center;display:flex;flex-direction:column;gap:4px}.player-label{font-size:.875rem;color:var(--text-secondary);font-weight:500}.score-value{font-size:1.75rem;font-weight:700;color:var(--text)}.score-x .score-value{color:var(--primary)}.score-o .score-value{color:var(--accent)}.score-draws .score-value{color:var(--secondary)}.game-status{text-align:center;min-height:48px;display:flex;align-items:center;justify-content:center}.status-text{font-size:1.25rem;font-weight:600;color:var(--text);padding:12px 24px;background:var(--surface);border-radius:var(--radius-sm);border:1px solid var(--border)}.board-container{display:flex;justify-content:center}.board{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:100%;max-width:360px;aspect-ratio:1}.cell{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-sm);font-size:3rem;font-weight:700;color:var(--text);cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;min-height:80px}.cell:hover:not(:disabled){border-color:var(--primary);background:#9e7fff1a;transform:scale(1.02)}.cell:focus-visible{outline:3px solid var(--primary);outline-offset:2px}.cell:disabled{cursor:not-allowed}.cell.filled{cursor:default}.cell.player-x{color:var(--primary);border-color:#9e7fff4d}.cell.player-o{color:var(--accent);border-color:#f472b64d}.cell.winning{background:#10b98126;border-color:var(--success);animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.restart-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:14px 24px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--text);border:none;border-radius:var(--radius-sm);font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease}.restart-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px #9e7fff4d}.restart-btn:focus-visible{outline:3px solid var(--primary);outline-offset:2px}.restart-btn:active{transform:translateY(0)}.restart-icon{width:20px;height:20px}@media (max-width: 480px){.game-header h1{font-size:2rem}.cell{font-size:2.5rem;min-height:70px}.score-value{font-size:1.5rem}.status-text{font-size:1.125rem}}@media (prefers-reduced-motion: reduce){.cell.winning{animation:none}.cell:hover:not(:disabled){transform:none}.restart-btn:hover{transform:none}}