.card-scene{position:relative;width:100%;height:0;padding-bottom:140%;perspective:1000px}.card{position:absolute;top:0;left:0;width:100%;height:100%;cursor:pointer;transition:transform .6s;transform-style:preserve-3d;-webkit-user-select:none;-moz-user-select:none;user-select:none}.card.is-flipped{transform:rotateY(180deg)}.card-face{position:absolute;width:100%;height:100%;-webkit-backface-visibility:hidden;backface-visibility:hidden;border-radius:1rem;box-shadow:0 4px 8px rgba(0,0,0,.2);display:flex;justify-content:center;align-items:center}.card-face-front{background-image:radial-gradient(circle,#5c678f 0,#2a314e 100%);border:4px solid #aeb8d3;color:hsla(0,0%,100%,.5);font-size:5rem;font-family:Arial Black,sans-serif;text-shadow:0 0 15px hsla(0,0%,100%,.3)}.card-face-back{background-color:#f0f0f0;border:4px solid #f7ce68;transform:rotateY(180deg);padding:.5rem;position:relative}@media(max-width:480px){.card-face{border-radius:.5rem}.card-face-front{font-size:3rem;border-width:2px}.card-face-back{border-width:2px}}.game-container{justify-content:center;padding:2rem 1rem;gap:2rem;min-height:60vh}.finished-screen,.game-container,.selection-screen{display:flex;flex-direction:column;align-items:center}.finished-screen,.selection-screen{background-color:#1e293b;border:1px solid #334155;padding:3rem;width:90%;max-width:800px;border-radius:1rem;box-shadow:0 8px 16px rgba(0,0,0,.2);text-align:center;gap:1.5rem}.finished-screen h2,.selection-screen h2{font-size:2rem;color:#e2e8f0}.finished-screen p,.selection-screen p{color:#94a3b8}.difficulty-buttons{display:flex;gap:1rem;margin:1rem 0}.difficulty-buttons button{padding:.8rem 1.5rem;font-size:1rem;font-weight:600;border:1px solid #475569;background-color:#334155;color:#cbd5e1;border-radius:.8rem;cursor:pointer;transition:all .2s}.difficulty-buttons button:hover{border-color:#818cf8;color:#fff}.difficulty-buttons button.active{color:#fff;border-color:#c084fc;box-shadow:0 0 15px rgba(192,132,252,.4)}@media(max-width:480px){.difficulty-buttons{flex-direction:column;width:80%}}.start-button{padding:1rem 3rem;font-size:1.2rem;font-weight:700;color:#fff;background-image:linear-gradient(90deg,#38bdf8,#818cf8,#c084fc);border:none;border-radius:.8rem;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px rgba(129,140,248,.3)}.start-button:hover{transform:scale(1.05) translateY(-2px);box-shadow:0 8px 20px rgba(129,140,248,.4)}.start-button:active{transform:scale(1)}.game-stats{display:flex;justify-content:space-between;width:100%;max-width:1100px;font-size:1.5rem;font-weight:700;color:#e2e8f0}@media(max-width:900px){.game-stats{max-width:90%}}@media(max-width:480px){.game-stats{font-size:1.2rem}}.game-board{display:grid;grid-gap:1rem;gap:1rem;width:100%;max-width:1100px}.game-board.difficulty-easy{grid-template-columns:repeat(4,1fr)}.game-board.difficulty-normal{grid-template-columns:repeat(6,1fr)}.game-board.difficulty-hard{grid-template-columns:repeat(8,1fr)}@media(max-width:900px){.game-board.difficulty-normal{grid-template-columns:repeat(4,1fr)}.game-board.difficulty-hard{grid-template-columns:repeat(5,1fr)}}@media(max-width:480px){.game-board{gap:.5rem}.game-board.difficulty-easy,.game-board.difficulty-hard,.game-board.difficulty-normal{grid-template-columns:repeat(4,1fr)}}@keyframes spin{to{transform:translate(-50%,-50%) rotate(1turn)}}