.card,.card-inner{position:relative}body{margin:0;font-family:'Segoe UI',sans-serif;background:#f4f4f9;display:flex;justify-content:center;min-height:100vh}.game-container{width:100%;max-width:600px;padding:10px;display:flex;flex-direction:column}.game-header{display:flex;flex-wrap:wrap;gap:10px;background:#fff;padding:15px;border-radius:12px;box-shadow:0 4px 6px rgba(0,0,0,.05);margin-bottom:15px;font-weight:700;font-size:1rem;align-items:center}.header-row-top{display:flex;width:100%;justify-content:space-between;align-items:center;border-bottom:1px solid #eee;padding-bottom:10px;margin-bottom:5px}.header-row-bottom{display:flex;width:100%;justify-content:space-between;align-items:center;font-size:.9rem;color:#555}#timer{font-family:monospace;font-size:1.1rem;color:#333;transition:color .3s}.timer-danger{color:#e74c3c!important;animation:1s infinite pulse;font-weight:800}.btn{border:none;background:#3498db;color:#fff;width:36px;height:36px;border-radius:50%;font-size:1.2rem;cursor:pointer;flex-shrink:0;line-height:35px;}select{padding:5px;border-radius:4px;border:1px solid #ddd}.best-score-block{cursor:help;border-bottom:1px dashed #ccc}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;perspective:1000px}.grid.large{grid-template-columns:repeat(4,1fr)}.card{height:90px;cursor:pointer;user-select:none;-webkit-tap-highlight-color:transparent}.card.hidden{opacity:0;pointer-events:none;transform:scale(.8);transition:.5s}.card-inner{width:100%;height:100%;transition:transform .6s cubic-bezier(.4, 0, .2, 1);transform-style:preserve-3d}.card-back,.card.flipped .card-inner{transform:rotateY(180deg)}.card-back,.card-front{position:absolute;width:100%;height:100%;backface-visibility:hidden;display:flex;align-items:center;justify-content:center;border-radius:12px;font-weight:700;box-shadow:0 2px 5px rgba(0,0,0,.1)}.card-front{background:linear-gradient(135deg,#2c3e50,#4ca1af);color:rgba(255,255,255,.8);font-size:2rem}.card-back{background:#fff;color:#333;border:2px solid #eee;padding:2px;text-align:center;font-size:1.1rem;word-break:break-word;line-height:1.2}@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.1)}}