.hero-section {
    background: url('https://via.placeholder.com/1920x1080') no-repeat center center/cover;
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card {
    border-radius: 15px;
}

.btn-lg {
    font-size: 1.2rem;
    font-weight: bold;
}

footer {
    font-size: 0.9rem;
}