body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    padding: 15px;
}

nav {
    display: flex;
    justify-content: center;
    background-color: #333;
}

nav a {
    color: white;
    padding: 14px 20px;
    text-decoration: none;
}

nav a:hover {
    background-color: #ddd;
    color: black;
}

section {
    padding: 20px;
}

.responsive {
    max-width: 100%;
    height: auto;
}

/* Media Queries for responsive design */

/* Phones and small devices */
@media (max-width: 600px) {
    nav {
        flex-direction: column;
    }

    nav a {
        padding: 10px;
        text-align: center;
    }

    header {
        font-size: 18px;
    }

    section {
        padding: 10px;
    }
}

/* Tablets and medium devices */
@media (max-width: 768px) {
    nav a {
        padding: 12px;
    }

    header {
        font-size: 20px;
    }

    section {
        padding: 15px;
    }
}