.btn-custom {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: white;
    transition: all 0.3s ease;
}
.btn-custom:hover {
    background-color: #0d1b2a;
    border-color: #0d1b2a;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.2);
}