*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:#0a0a0a;min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px;color:#fff}#root{width:100%;max-width:1200px}.app{display:flex;flex-direction:column;align-items:center;gap:30px}.game-header{display:flex;flex-direction:column;align-items:center;gap:20px;background:#0f172ae6;padding:30px;border-radius:20px;box-shadow:0 10px 30px #00000080;width:100%;max-width:600px;border:1px solid rgba(255,255,255,.1)}.game-header h1{font-size:2.5rem;color:#fff;text-align:center}.stats{display:flex;gap:30px;justify-content:center;width:100%}.stat-item{display:flex;flex-direction:column;align-items:center;gap:5px}.stat-label{font-size:.9rem;color:#a1a1aa;font-weight:600;text-transform:uppercase;letter-spacing:1px}.stat-value{font-size:2rem;font-weight:700;color:#818cf8}.reset-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 30px;font-size:1.1rem;font-weight:600;border-radius:10px;cursor:pointer;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{background:#0f172af2;padding:30px 50px;border-radius:15px;text-align:center;box-shadow:0 10px 30px #00000080;border:1px solid rgba(255,255,255,.1);animation:slideDown .5s ease-out}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.win-message h2{font-size:2rem;margin-bottom:10px}.win-message p{font-size:1.2rem;color:#a1a1aa}.cards-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;max-width:600px;width:100%}.card{aspect-ratio:1;position:relative;cursor:pointer;transform-style:preserve-3d;transition:transform .6s}.card-front,.card-back{position:absolute;width:100%;height:100%;display:flex;align-items:center;justify-content:center;border-radius:15px;box-shadow:0 4px 15px #0003;backface-visibility:hidden;transition:opacity .3s,transform .3s}.card-front{background:linear-gradient(to bottom,#0f172a,#0b0f1a);color:#fff;font-weight:700;font-size:3rem;z-index:1;border:2px solid rgba(255,255,255,.1)}.card-back{background:#1e1e1e;font-size:4rem;z-index:0;border:2px solid rgba(255,255,255,.1)}.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;box-shadow:0 0 20px #7ed32166;border:2px solid rgba(126,211,33,.5)}.card:hover:not(.matched):not(.flipped) .card-front{transform:scale(1.05)}.card:active:not(.matched){transform:scale(.95)}@media(max-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(max-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}}