body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.5;
    background: #f9fafb;
    color: #111827;
    font-size: 16px;
}

header {
    background: #0b5cff;
    color: white;
    padding: 30px 15px;
    border-bottom: 4px solid #0a4bd6;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2rem;
}

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 15px;
}

section {
    background: white;
    padding: 18px;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.08);
    margin-bottom: 20px;
}

section h2 {
    margin-top: 0;
    color: #0b5cff;
    font-size: 1.2rem;
}

footer {
    font-size: 0.9em;
    color: #6b7280;
    margin: 30px auto;
    text-align: center;
    max-width: 900px;
    padding: 15px;
}

/* Mobielvriendelijk */
@media (max-width: 600px) {
    header h1 {
        font-size: 1.6rem;
    }
    section {
        padding: 14px;
    }
    section h2 {
        font-size: 1.1rem;
    }
    body {
        font-size: 15px;
    }
}