:root {
    color-scheme: light dark;
    --bg: #fff;
    --bg-nav: #1a1a2e;
    --bg-nav-end: #16213e;
    --bg-code: #f4f4f8;
    --bg-inline-code: #eeeef2;
    --bg-topic: #e2e2e8;
    --bg-th: #f4f4f8;
    --text: #2a2a2a;
    --text-muted: #6a6a7a;
    --text-topic: #555;
    --text-nav: #e0e0e8;
    --link: #3b5998;
    --link-nav: #c8c8e0;
    --border: #d8d8e0;
    --border-blockquote: #3b5998;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f0f14;
        --bg-nav: #0a0a12;
        --bg-nav-end: #12121e;
        --bg-code: #1a1a24;
        --bg-inline-code: #1e1e2a;
        --bg-topic: #1e1e2a;
        --bg-th: #1a1a24;
        --text: #d4d4dc;
        --text-muted: #7a7a8e;
        --text-topic: #9a9ab0;
        --text-nav: #b8b8d0;
        --link: #7b9fe0;
        --link-nav: #9898c0;
        --border: #2a2a3a;
        --border-blockquote: #7b9fe0;
    }
}
* { box-sizing: border-box; }
body {
    font-family: "Helvetica Neue", helvetica, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    transition: background 0.2s, color 0.2s;
}
h1, h2, h3 {
    font-family: Georgia, 'Times New Roman', Times, serif;
    line-height: 1.3;
}
h1 { margin-top: 0; }
nav {
    background: linear-gradient(to bottom, var(--bg-nav), var(--bg-nav-end));
    color: var(--text-nav);
    border-bottom: 1px solid var(--border);
}
nav p {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0;
    padding: 10px 2em;
    max-width: 800px;
}
nav a {
    color: var(--link-nav);
    text-decoration: none;
    font-weight: 500;
}
nav a:hover { text-decoration: underline; }
section.body {
    padding: 1.5em 2em;
    max-width: 800px;
    margin: 0 auto;
}
@media (max-width: 600px) {
    section.body { padding: 1em; }
    nav p { padding: 10px 1em; }
}
a {
    color: var(--link);
    text-decoration: none;
}
a:hover { text-decoration: underline; }
.topic {
    display: inline-block;
    background-color: var(--bg-topic);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75em;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}
.topic a {
    text-decoration: none;
    color: var(--text-topic);
}
.date {
    color: var(--text-muted);
    font-size: 0.85em;
    margin-left: 0.3em;
}
.created {
    border-top: 1px solid var(--border);
    padding-top: 0.75em;
    margin-top: 2em;
    font-size: 0.8em;
    color: var(--text-muted);
}
pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    background: var(--bg-code);
    padding: 1em;
    border-radius: 6px;
    overflow-x: auto;
    border: 1px solid var(--border);
    font-size: 0.9em;
    line-height: 1.5;
}
code {
    background: var(--bg-inline-code);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.88em;
}
pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    font-size: inherit;
}
table {
    border-collapse: collapse;
    margin: 1em 0;
}
th, td {
    padding: 0.4em 0.8em;
    border: 1px solid var(--border);
}
th { background: var(--bg-th); }
blockquote {
    margin: 1em 0;
    border-left: 4px solid var(--border-blockquote);
    padding: 0.5em 1em;
    color: var(--text-muted);
    background: var(--bg-code);
    border-radius: 0 6px 6px 0;
}
img { max-width: 100%; border-radius: 4px; }
hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1.5em 0;
}