header {
        background: #1a1a1a;
        padding: 1rem 0;
    }
    header ul {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        justify-content: center;
        gap: 2rem;
    }
    header a {
        color: lightblue;
        text-decoration: none;
        font-weight: bold;
        padding: 0.5rem 1rem;
        transition: color 0.3s;
    }
    header a:hover {
        color: red;
    }
    body {
        background-color: lavender;
    }