body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

header {
    background: #4CAF50;
    color: white;
    padding: 10px 0;
    text-align: center;
}

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

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

h2 {
    color: #333;
}

button {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
}

button a {
    color: white;
    text-decoration: none;
}

form {
    max-width: 400px;
    margin: 20px auto;
}

footer {
    text-align: center;
    padding: 10px 0;
    background: #333;
    color: white;
}