body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
}

header {
    background-color: #f8f8f8;
    padding: 10px 20px;
    border-bottom: 1px solid #ddd;
}

header h1 {
    margin: 0;
    display: inline;
}

header nav ul {
    list-style: none;
    padding: 0;
    display: inline;
    float: right;
}

header nav ul li {
    display: inline;
    margin-left: 20px;
}

h2 {
    margin-bottom: 20px;
}

form {
    max-width: 400px;
    margin: 0 auto;
}

label {
    display: block;
    margin-bottom: 5px;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
}

button {
    padding: 10px 20px;
}