body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f0f4f8;
    color: #333;
}
header {
    background-color: #0074D9;
    color: white;
    text-align: center;
    padding: 2em 1em;
}
header .logo {
    height: 60px;
    margin-bottom: 1em;
}
main {
    padding: 2em 1em;
    max-width: 800px;
    margin: auto;
}
section {
    margin-bottom: 2em;
}
footer {
    text-align: center;
    padding: 1em;
    background: #e2e8f0;
    color: #555;
}
a {
    color: #0074D9;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}