.rollercoin-card {
    background: linear-gradient(145deg, #252841 0%, #1f2135 100%);
    border: 2px solid #3d4162;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.rollercoin-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(3, 225, 228, 0.5), transparent);
}