.board{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:15px}.side{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.tile{height:90px;border-radius:12px;background:#ddd;cursor:pointer;transition:.08s}.blue{background:#4e73df}.red{background:#e74a3b}.purple{background:#9b59b6}.gray{background:#ddd}.side:first-child{box-shadow:-6px 0 0 #cdd4ff inset}.side:last-child{box-shadow:6px 0 0 #ffd2d2 inset}.tutorial{font-size:24px;font-weight:700;height:120px;display:flex;align-items:center;justify-content:center}