.app{max-width:600px;margin:0 auto;padding:2rem;min-height:100vh;display:flex;flex-direction:column;justify-content:center}header h1{font-size:3rem;font-weight:700;margin-bottom:2rem;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}main{display:flex;flex-direction:column;align-items:center;gap:2rem}.game-status{font-size:1.5rem;font-weight:600;padding:1rem 2rem;border-radius:12px;background:#667eea1a;border:2px solid rgba(102,126,234,.3);transition:all .3s ease;min-height:60px;display:flex;align-items:center;justify-content:center}.game-status.game-over{background:#764ba233;border-color:#764ba280;animation:pulse 1s ease-in-out}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.board{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem;padding:1rem;background:#667eea0d;border-radius:16px;box-shadow:0 8px 32px #0000001a}.cell{width:100px;height:100px;font-size:2.5rem;font-weight:700;border:none;border-radius:12px;background:#ffffff0d;color:inherit;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.cell:not(:disabled):hover{background:#667eea33;transform:scale(1.05)}.cell:disabled{cursor:not-allowed}.cell-x{color:#667eea;animation:fadeIn .3s ease}.cell-o{color:#764ba2;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}.reset-button{padding:1rem 2rem;font-size:1.125rem;font-weight:600;border:none;border-radius:12px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 16px #667eea66}.reset-button:hover{transform:translateY(-2px);box-shadow:0 6px 24px #667eea99}.reset-button:active{transform:translateY(0)}footer{margin-top:3rem;padding-top:2rem;border-top:1px solid rgba(255,255,255,.1)}footer p{font-size:.875rem;opacity:.6}@media (max-width: 480px){.app{padding:1rem}header h1{font-size:2rem}.cell{width:80px;height:80px;font-size:2rem}.game-status{font-size:1.25rem;padding:.75rem 1.5rem}.board{gap:.5rem;padding:.75rem}}@media (prefers-color-scheme: light){.board{background:#667eea14}.cell{background:#00000008}.cell:not(:disabled):hover{background:#667eea26}footer{border-top:1px solid rgba(0,0,0,.1)}}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}#root{width:100%;margin:0 auto;text-align:center}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}}