body {
    font-family: Arial, sans-serif;
    background-color: #f7f7f7;
    color: #333;
    margin: 0;
    padding: 0;
    /*border: 10px solid red;*/
}

header {
    background-color: #0077cc;
    color: white;
    padding: 20px;
    text-align: center;
}

nav {
    background-color: #eee;
    padding: 10px;
    text-align: center;
}

nav a {
    margin: 0 15px;
    text-decoration: none;
    color: #0077cc;
}

nav a:hover {
    text-decoration: underline;
}

main {
    padding: 30px;
    max-width: 800px;
    margin: auto;
    background: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
    border-radius: 10px;
}

footer {
    background-color: #f1f1f1;
    color: #555;
    text-align: center;
    padding: 10px;
    margin-top: 30px;
    font-size: 0.9em;
}