body {
    font-family: Arial, sans-serif;
    background: #f8f9fa;
    color: #222;
    margin: 0;
    padding: 0;
}
header {
    background: #2d3748;
    color: #fff;
    padding: 2rem 1rem 1rem 1rem;
    text-align: center;
}
main {
    max-width: 700px;
    margin: 2rem auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.07);
    padding: 2rem;
}
section {
    margin-bottom: 2rem;
}
footer {
    text-align: center;
    color: #888;
    padding: 1rem;
    background: #e2e8f0;
    border-top: 1px solid #cbd5e1;
    font-size: 0.95rem;
}
a {
    color: #3182ce;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}