:root{color-scheme:light;font-family:Arial,sans-serif;line-height:1.5}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#f0f4f8;color:#2d3748}.app{display:flex;flex-direction:column;align-items:center;padding:20px}h1{color:#2d3748;margin-bottom:10px}.info{font-size:18px;color:#2d3748;margin-bottom:15px}.game-board{display:grid;grid-template-columns:repeat(4,100px);gap:12px;background:#fff;padding:20px;border-radius:10px;box-shadow:0 4px 12px #0000001a}.card{width:100px;height:100px;background:#3182ce;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:40px;color:#fff;cursor:pointer;transition:all .2s ease;border:none;padding:0;transform:rotateY(180deg);transform-style:preserve-3d}.card.flipped{background:#fff;color:#2d3748;transform:rotateY(0);border:2px solid #3182ce}.card.matched{background:#48bb78;color:#fff;cursor:default;transform:rotateY(0)}.new-game-btn{margin-top:20px;padding:10px 25px;font-size:16px;background:#3182ce;color:#fff;border:none;border-radius:6px;cursor:pointer}.new-game-btn:hover{background:#2b6cb0}