#gameCanvas {
    background-color: var(--bs-dark);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

.skin-btn.active {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

#gameOver {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--bs-dark);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    z-index: 1000;
}