.premium-card {
    background: #ffffff;
    border-radius: 1.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.premium-logo {
    transition: all 0.3s ease;
    filter: drop-shadow(0 4px 3px rgba(0, 0, 0, 0.07));
}

.premium-logo:hover {
    transform: scale(1.02);
}

.btn-primary {
    background: #1da3dd;
    transition: all 0.3s ease;
    padding: 0.875rem 2rem;
    font-weight: 600;
    border-radius: 0.75rem;
    width: 100%;
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(29, 163, 221, 0.2);
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    background: #1689b8;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(29, 163, 221, 0.4);
}

.btn-secondary {
    background: #1f2937;
    transition: all 0.3s ease;
    padding: 0.875rem 2rem;
    font-weight: 600;
    border-radius: 0.75rem;
    width: 100%;
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    display: inline-block;
}

.btn-secondary:hover {
    background: #111827;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2);
}

@media (max-width: 640px) {
    .btn-primary, .btn-secondary {
        padding: 0.75rem 1.5rem;
    }
}