.grid{display:grid;gap:10px;margin-top:10px}.card{perspective:700px;height:90px}.inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:.35s}.card.open .inner{transform:rotateY(180deg)}.face{position:absolute;width:100%;height:100%;display:flex;align-items:center;justify-content:center;border-radius:12px;font-size:22px;backface-visibility:hidden}.front{background:#4e73df}.back{background:#fff;color:#333;transform:rotateY(180deg)}.done .back{background:#1cc88a;color:#fff}.leaderboard{margin-top:15px;font-size:14px;text-align:left;display:inline-block}