body {
    font-family: Arial, sans-serif;
    background: #f6f7fb;
    margin: 0;
    padding: 0;
    color: #222;
}

.container {
    max-width: 900px;
    margin: 40px auto;
    background: #fff;
    padding: 28px;
    border-radius: 10px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}

h1 {
    margin-top: 0;
}

nav {
    margin: 20px 0;
    padding: 12px 14px;
    background: #f2f3f7;
    border-radius: 8px;
}

nav a {
    text-decoration: none;
    font-weight: bold;
    margin-right: 12px;
    color: #2b4cff;
}

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

hr {
    border: 0;
    border-top: 1px solid #e6e6e6;
    margin: 22px 0;
}

footer {
    color: #666;
    font-size: 0.9em;
}