:root{--primary-color:#8b5cf6;--accent-color:#a78bfa;--bg-color:#fff;--text-color:#1f2937;--text-secondary:#6b7280;--border-color:#e5e7eb;--hover-color:#f5f3ff;--winning-bg:#ede9fe}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.5}#root{flex-direction:column;min-height:100vh;display:flex}.app-header{background-color:var(--primary-color);color:#fff;padding:1rem;box-shadow:0 2px 4px #0000001a}.app-header h1{font-size:1.5rem;font-weight:600}.app-content{flex:1;padding:1rem}.game-container{max-width:500px;margin:0 auto;padding:2rem 1rem}.game-status{text-align:center;margin-bottom:2rem}.game-status h2{color:var(--text-color);margin-bottom:.5rem;font-size:1.75rem;font-weight:700}.current-player{color:var(--text-secondary);margin-bottom:.5rem;font-size:1.25rem}.player-x{color:var(--primary-color);font-weight:600}.player-o{color:var(--accent-color);font-weight:600}.winner-message{margin-bottom:1rem;font-size:1.5rem;font-weight:700}.winner-message.x-wins{color:var(--primary-color)}.winner-message.o-wins{color:var(--accent-color)}.winner-message.draw{color:var(--text-secondary)}.game-board{grid-template-columns:repeat(3,1fr);gap:.75rem;max-width:400px;margin-bottom:2rem;margin-left:auto;margin-right:auto;display:grid}.game-cell{aspect-ratio:1;border:3px solid var(--border-color);cursor:pointer;-webkit-user-select:none;user-select:none;background-color:#fff;border-radius:.5rem;justify-content:center;align-items:center;font-size:3rem;font-weight:700;transition:all .2s;display:flex}.game-cell:hover:not(.filled):not(.disabled){background-color:var(--hover-color);border-color:var(--primary-color);transform:scale(1.05)}.game-cell.filled{cursor:default}.game-cell.disabled{cursor:not-allowed;opacity:.6}.game-cell.winning{background-color:var(--winning-bg);border-color:var(--accent-color);animation:.5s ease-in-out pulse}.game-cell .cell-x{color:var(--primary-color)}.game-cell .cell-o{color:var(--accent-color)}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.game-controls{text-align:center}.reset-button{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:.5rem;padding:.75rem 2rem;font-size:1rem;font-weight:600;transition:all .2s;box-shadow:0 2px 4px #0000001a}.reset-button:hover{background-color:#7c3aed;transform:translateY(-2px);box-shadow:0 4px 6px #00000026}.reset-button:active{transform:translateY(0);box-shadow:0 2px 4px #0000001a}@media (width<=640px){.game-container{padding:1rem}.game-status h2{font-size:1.5rem}.current-player{font-size:1.125rem}.winner-message{font-size:1.25rem}.game-board{gap:.5rem}.game-cell{border-width:2px;font-size:2.5rem}}