body {
    background-color: #c0c0c0; /* color Windows 98 */
    font-family: Verdana, Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.container {
    width: 700px;
    margin: 50px auto;
    background: #ffffff;
    padding: 20px;
    border: 3px ridge #000;
}

h1 {
    font-size: 28px;
    margin: 0;
    text-align: center;
    color: #000080; /* azul Windows */
}

.subtitle {
    text-align: center;
    font-size: 12px;
    color: #555;
    margin-bottom: 20px;
}

nav {
    text-align: center;
    margin: 20px 0;
}

nav a {
    display: inline-block;
    background: #e0e0e0;
    padding: 8px 12px;
    margin: 5px;
    border: 2px outset #aaa;
    text-decoration: none;
    color: #000;
    font-size: 14px;
}

nav a:hover {
    background: #fff;
    border: 2px inset #aaa;
}