body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f5f5f5;
    color: #333;
}
.container {
    width: 90%;
    max-width: 1000px;
    margin: auto;
    padding: 20px;
}
header {
    background: #003366;
    color: white;
    padding: 10px 0;
}
header h1 {
    margin: 0;
    padding-left: 20px;
}
nav {
    text-align: right;
    margin-top: -30px;
    margin-right: 20px;
}
nav a {
    color: white;
    margin-left: 15px;
    text-decoration: none;
    font-weight: bold;
}
main .intro {
    margin-top: 20px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
footer {
    background: #222;
    color: white;
    text-align: center;
    padding: 10px 0;
    margin-top: 20px;
}