body {
    background-color: #f8f9fa;
}

header h1 {
    font-weight: 700;
}

#selection .btn {
    transition: all 0.3s ease;
}

#selection .btn:hover {
    transform: translateY(-5px);
}

.card {
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.card-title {
    color: #333;
    font-weight: 600;
}