* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.7;
    color: #1a1a1a;
    background: #fafafa;
}
.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 48px 24px;
}
h1 {
    font-size: 2rem;
    margin-bottom: 4px;
}
.updated {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 40px;
}
h2 {
    font-size: 1.25rem;
    margin-top: 36px;
    margin-bottom: 12px;
    color: #111;
}
h3 {
    font-size: 1.05rem;
    margin-top: 16px;
    margin-bottom: 8px;
}
p, li {
    margin-bottom: 12px;
    color: #333;
}
ul, ol {
    padding-left: 24px;
}
a {
    color: #1a73e8;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.section {
    margin-bottom: 8px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}
th, td {
    text-align: left;
    padding: 10px 12px;
    border: 1px solid #ddd;
}
th {
    background: #f0f0f0;
    font-weight: 600;
}
td:first-child {
    white-space: nowrap;
}
nav {
    margin-bottom: 32px;
    font-size: 0.9rem;
}
nav a {
    margin-right: 16px;
}
.footnote {
    font-size: 0.85rem;
    color: #666;
}
.card-list {
    list-style: none;
    padding: 0;
    margin-top: 24px;
}
.card-list li {
    margin-bottom: 16px;
}
.card-list a {
    display: block;
    padding: 20px 24px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 500;
    transition: border-color 0.15s;
}
.card-list a:hover {
    border-color: #1a73e8;
    text-decoration: none;
}
.card-list .desc {
    display: block;
    font-size: 0.85rem;
    font-weight: 400;
    color: #666;
    margin-top: 4px;
}