body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f5f5f5;
    color: #333;
}

header {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem;
}

main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

section {
    background: white;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
}

button {
    padding: 0.75rem 1rem;
    border: none;
    background: #3498db;
    color: white;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background: #2980b9;
}

footer {
    text-align: center;
    padding: 1rem;
    background: #ddd;
}