body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #333;
    color: #fff;
    padding: 20px;
    text-align: center;
}

h1, h2 {
    margin: 0;
}

nav ul {
    list-style-type: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin-right: 10px;
}

a {
    color: #fff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

section {
    padding: 20px;
    background-color: #fff;
    margin: 20px;
    border-radius: 8px;
}

footer {
    padding: 20px;
    background-color: #fff;
    margin: 20px;
    border-radius: 8px;
    text-align: center;
}

form {
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 5px;
}

input[type="text"], input[type="email"] {
    width: 80%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
}

input[type="submit"] {
    background-color: #5c7a8e;
    color: white;
    border: none;
    padding: 10px;
    cursor: pointer;
    border-radius: 4px;
}

input[type="submit"]:hover {
    background-color: #4a5d6a;
}

@media only screen and (max-width: 768px) {
    body {
        font-size: 14px;
    }
    header {
        padding: 10px;
    }
    section, footer {
        margin: 10px;
    }
}