body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
    color: #333;
    background: #fff;
}
header {
    margin-bottom: 2rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 1rem;
}
h1 { font-size: 2rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.5rem; margin-top: 2rem; }
.button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    margin: 0.5rem 0.5rem 0.5rem 0;
    background: #000;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
}
.button:hover { background: #333; }
footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid #eee;
    font-size: 0.9rem;
    display: flex;
    gap: 1rem;
}
a { color: #0066cc; text-decoration: none; }
a:hover { text-decoration: underline; }