:root {
    --bg: #ffffff;
    --fg: #1f2330;
    --muted: #5b6075;
    --accent: #4a5fc1;
    --border: #e5e7f0;
    --code-bg: #f6f7fb;
}
* { box-sizing: border-box; }
html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
                 "Malgun Gothic", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.65;
    font-size: 16px;
}
.wrap {
    max-width: 800px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}
header.site {
    border-bottom: 1px solid var(--border);
    padding-bottom: 24px;
    margin-bottom: 32px;
}
header.site h1 {
    margin: 0 0 4px;
    font-size: 22px;
    font-weight: 700;
}
header.site .sub {
    color: var(--muted);
    font-size: 14px;
}
nav.top {
    margin-top: 12px;
    font-size: 14px;
}
nav.top a {
    color: var(--accent);
    margin-right: 16px;
    text-decoration: none;
}
nav.top a:hover { text-decoration: underline; }
h1.doc { font-size: 28px; margin: 0 0 8px; }
.meta {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 32px;
}
h2 {
    font-size: 18px;
    margin-top: 36px;
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}
h3 {
    font-size: 16px;
    margin-top: 22px;
    margin-bottom: 6px;
}
p, ul, ol { margin: 8px 0 12px; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 14px;
}
th, td {
    border: 1px solid var(--border);
    padding: 8px 12px;
    text-align: left;
    vertical-align: top;
}
th { background: var(--code-bg); font-weight: 600; }
code {
    background: var(--code-bg);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 14px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
.placeholder {
    background: #fff6c8;
    padding: 1px 6px;
    border-radius: 4px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 13px;
    color: #5a4400;
}
footer.site {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 13px;
}