body {
    font-family: Arial, sans-serif;
    background-color: #e0e0e0;
    margin: 20px;
    padding: 0;
    text-align: center;
}
.container {
    width: 80%;
    margin: auto;
    background: white;
    padding: 20px;
    border: 2px solid black;
}
h1, h2 {
    color: black;
}
a {
    text-decoration: none;
    color: blue;
}
nav {
    background: lightgray;
    padding: 10px;
}
nav a {
    margin: 0 15px;
    font-weight: bold;
}