body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    color: #222;
    background-color: #f9f9f9;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

header, footer {
    background-color: #fff;
    padding: 1rem 2rem;
    border-bottom: 1px solid #e0e0e0;
}

footer {
    border-top: 1px solid #e0e0e0;
    border-bottom: none;
    text-align: center;
    margin-top: 2rem;
}

main {
    padding: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

h1, h2, h3 {
    color: #111;
}

a {
    color: #0056b3;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.metrics-hero {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1.5rem;
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.metric-card h3 {
    margin-top: 0;
    font-size: 1.1rem;
    color: #444;
}

.metric-card .value {
    font-size: 2rem;
    font-weight: bold;
    color: #0056b3;
    margin-bottom: 0.5rem;
}

.metric-card .note {
    font-size: 0.85rem;
    color: #666;
}

dl.faq-list {
    margin-top: 1.5rem;
}

dl.faq-list dt {
    font-weight: bold;
    margin-top: 1.5rem;
}

dl.faq-list dd {
    margin-left: 0;
    margin-bottom: 1.5rem;
    color: #444;
}