body {
    background: #f0f2f5;
}

.hero {
    background: linear-gradient(135deg, #0d6efd, #6610f2);
    color: white;
    padding: 50px 20px;
    text-align: center;
    border-radius: 0 0 20px 20px;
    margin-bottom: 40px;
}

.card {
    border: none;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform .2s, box-shadow .2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.15);
}

.btn-sultcode {
    background: #0d6efd;
    border: none;
}

.btn-sultcode:hover {
    background: #0b5ed7;
}

.spinner {
    display: none;
}