:root {
    color-scheme: light dark;
    --bg: #ffffff;
    --fg: #1c1c1e;
    --fg-secondary: #6c6c70;
    --link: #007aff;
    --rule: #e5e5ea;
    --code-bg: #f2f2f7;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --fg: #f2f2f7;
        --fg-secondary: #98989d;
        --link: #0a84ff;
        --rule: #2c2c2e;
        --code-bg: #1c1c1e;
    }
}
* { box-sizing: border-box; }
body {
    margin: 0;
    padding: 16px 18px 48px;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", "Yu Gothic", sans-serif;
    color: var(--fg);
    background: var(--bg);
    line-height: 1.7;
    font-size: 15px;
    word-wrap: break-word;
}
h1 {
    font-size: 22px;
    margin: 8px 0 4px;
    line-height: 1.4;
}
h2 {
    font-size: 17px;
    margin: 28px 0 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--rule);
    scroll-margin-top: 12px;
}
p, ul, ol { margin: 8px 0 12px; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
.meta {
    color: var(--fg-secondary);
    font-size: 13px;
    margin-bottom: 16px;
}
a { color: var(--link); text-decoration: none; }
.section-label {
    margin: 16px 0 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--fg-secondary);
}
.note {
    background: var(--code-bg);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 14px;
    margin: 12px 0;
}
.note-title {
    margin: 0 0 6px;
    font-weight: 600;
}
.note-list {
    margin: 0;
}