:root{--app-background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--card-width: 115px;--card-height: 161px;--game-board-bg: rgba(255, 255, 255, .1);--game-board-radius: 15px;--controls-bg: rgba(255, 255, 255, .1);--controls-radius: 15px;--btn-base-start: #4a90e2;--btn-base-end: #357ab8;--btn-text: #ffffff;--btn-primary-start: #4CAF50;--btn-primary-end: #45a049;--btn-primary-text: #ffffff}.app{text-align:center;padding:20px;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:var(--app-background);min-height:100vh;color:#fff}.app-header{display:flex;align-items:center;justify-content:center;padding-top:10px;margin-bottom:10px}.brand-logo{max-width:200px;max-height:200px}.app h1{font-size:2.5rem;margin-bottom:30px;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.card{width:var(--card-width);height:var(--card-height);perspective:1000px;margin:5px;display:inline-block;cursor:pointer;transition:transform .2s}.card:hover{transform:scale(1.05)}.card-inner{position:relative;width:100%;height:100%;transition:transform .6s;transform-style:preserve-3d;border-radius:8px}.card.flipped .card-inner{transform:rotateY(180deg)}.card-front,.card-back{position:absolute;width:100%;height:100%;border-radius:8px;backface-visibility:hidden;display:flex;justify-content:center;align-items:center;border:2px solid #ddd;box-shadow:0 4px 8px #0003}.card-front{background-color:#4a90e2}.card-back{background-color:#fff;transform:rotateY(180deg)}.card-logo,.card-image{max-width:80%;max-height:80%;object-fit:contain;border-radius:4px}.game-board{display:flex;flex-wrap:wrap;justify-content:center;max-width:700px;margin:20px auto;padding:20px;background-color:var(--game-board-bg);border-radius:var(--game-board-radius);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.game-controls{display:flex;flex-direction:column;align-items:center;gap:15px;background-color:var(--controls-bg);padding:20px;border-radius:var(--controls-radius);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);max-width:700px;margin:20px auto}.game-stats{display:flex;gap:30px;font-weight:700;flex-wrap:wrap;justify-content:center}.stat-item{display:flex;flex-direction:column;align-items:center;gap:5px}.stat-label{font-size:.9rem;opacity:.8}.stat-value{font-size:1.2rem;font-weight:700}.stat-value.warning{color:#ff6b6b;animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}.progress-bar{width:100%;max-width:400px}.progress-label{font-size:.9rem;margin-bottom:8px;opacity:.9}.progress-track{width:100%;height:10px;background-color:#fff3;border-radius:5px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#4caf50,#8bc34a);transition:width .3s ease;border-radius:5px}.progress-text{font-size:.8rem;margin-top:5px;opacity:.8}.button{padding:12px 24px;border:none;border-radius:8px;background:linear-gradient(45deg,var(--btn-base-start),var(--btn-base-end));color:var(--btn-text);cursor:pointer;font-size:16px;font-weight:700;transition:all .3s ease;box-shadow:0 4px 15px #0003}.button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0000004d}.button:active{transform:translateY(0)}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#000000b3;display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{padding:30px;border-radius:15px;text-align:center;max-width:400px;width:90%;box-shadow:0 10px 30px #0000004d;color:#fff}.modal-header h2{margin:0 0 20px;font-size:1.8rem}.modal-body p{margin:0 0 25px;font-size:1.1rem;line-height:1.5}.modal-actions{display:flex;gap:15px;justify-content:center;flex-wrap:wrap}.button.primary{background:linear-gradient(45deg,var(--btn-primary-start),var(--btn-primary-end));color:var(--btn-primary-text)}.button.secondary{background:linear-gradient(45deg,#757575,#616161)}@media (max-width: 768px){.game-stats{flex-direction:column;gap:15px}.modal-actions{flex-direction:column}.app h1{font-size:2rem}.card{width:calc(var(--card-width) * .9);height:calc(var(--card-height) * .9)}.game-board,.game-controls{max-width:500px}}