*{box-sizing:border-box;margin:0;padding:0}body{color:#fff;background:#0a0a0a;justify-content:center;align-items:center;min-height:100vh;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;display:flex}#root{width:100%;max-width:1200px}.app{flex-direction:column;align-items:center;gap:30px;display:flex}.game-header{background:#0f172ae6;border:1px solid #ffffff1a;border-radius:20px;flex-direction:column;align-items:center;gap:20px;width:100%;max-width:600px;padding:30px;display:flex;box-shadow:0 10px 30px #00000080}.game-header h1{color:#fff;text-align:center;font-size:2.5rem}.stats{justify-content:center;gap:30px;width:100%;display:flex}.stat-item{flex-direction:column;align-items:center;gap:5px;display:flex}.stat-label{color:#a1a1aa;text-transform:uppercase;letter-spacing:1px;font-size:.9rem;font-weight:600}.stat-value{color:#818cf8;font-size:2rem;font-weight:700}.reset-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border:none;border-radius:10px;padding:12px 30px;font-size:1.1rem;font-weight:600;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 15px #0003}.reset-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0000004d}.reset-btn:active{transform:translateY(0)}.win-message{text-align:center;background:#0f172af2;border:1px solid #ffffff1a;border-radius:15px;padding:30px 50px;animation:.5s ease-out slideDown;box-shadow:0 10px 30px #00000080}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.win-message h2{margin-bottom:10px;font-size:2rem}.win-message p{color:#a1a1aa;font-size:1.2rem}.cards-grid{grid-template-columns:repeat(4,1fr);gap:15px;width:100%;max-width:600px;display:grid}.card{aspect-ratio:1;cursor:pointer;transform-style:preserve-3d;transition:transform .6s;position:relative}.card-front,.card-back{backface-visibility:hidden;border-radius:15px;justify-content:center;align-items:center;width:100%;height:100%;transition:opacity .3s,transform .3s;display:flex;position:absolute;box-shadow:0 4px 15px #0003}.card-front{color:#fff;z-index:1;background:linear-gradient(#0f172a,#0b0f1a);border:2px solid #ffffff1a;font-size:3rem;font-weight:700}.card-back{z-index:0;background:#1e1e1e;border:2px solid #ffffff1a;font-size:4rem}.card.flipped .card-front{opacity:0;pointer-events:none;transform:scale(.9)}.card.flipped .card-back{opacity:1}.card.matched{pointer-events:none}.card.matched .card-back{background:#7ed32133;border:2px solid #7ed32180;box-shadow:0 0 20px #7ed32166}.card:hover:not(.matched):not(.flipped) .card-front{transform:scale(1.05)}.card:active:not(.matched){transform:scale(.95)}@media (width<=768px){.game-header h1{font-size:2rem}.cards-grid{gap:10px}.card-front,.card-back{font-size:2.5rem}.card-back{font-size:3rem}.stats{gap:20px}.stat-value{font-size:1.5rem}}@media (width<=480px){.game-header{padding:20px}.game-header h1{font-size:1.5rem}.card-front,.card-back{font-size:2rem}.card-back{font-size:2.5rem}}