/* Light is the palette of the default blog theme, dark is the palette of
   the dark one, so a site that mixes docs and posts stays one thing.
   --panel is the only addition: the docs layout has raised surfaces
   (hover rows, table headers, callouts) that the blog templates lack. */
:root {
    --bg:       #ffffff;
    --panel:    #f7fafc;
    --border:   #e2e8f0;
    --text:     #1a202c;
    --muted:    #718096;
    --accent:   #2b6cb0;
    --code-bg:  #f7fafc;
    --cal-note:      #2b6cb0;
    --cal-tip:       #276749;
    --cal-important: #553c9a;
    --cal-warning:   #975a16;
    --cal-caution:   #9b2c2c;
}
/* Dark applies when the system asks for it and the reader has not chosen
   otherwise, or when the reader chose it outright. The two blocks carry
   the same values; only the condition differs. */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg:      #0f1117;
        --panel:   #191d28;
        --border:  #2a2d3a;
        --text:    #e2e8f0;
        --muted:   #8b98ab;
        --accent:  #60a5fa;
        --code-bg: #141720;
        --cal-note:      #63b3ed;
        --cal-tip:       #68d391;
        --cal-important: #b794f4;
        --cal-warning:   #f6ad55;
        --cal-caution:   #fc8181;
    }
}
:root[data-theme="dark"] {
    --bg:      #0f1117;
    --panel:   #191d28;
    --border:  #2a2d3a;
    --text:    #e2e8f0;
    --muted:   #8b98ab;
    --accent:  #60a5fa;
    --code-bg: #141720;
    --cal-note:      #63b3ed;
    --cal-tip:       #68d391;
    --cal-important: #b794f4;
    --cal-warning:   #f6ad55;
    --cal-caution:   #fc8181;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); line-height: 1.7;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
        Helvetica, Arial, sans-serif; }

/* top bar */
.topbar { display: flex; align-items: center; justify-content: space-between;
    gap: 0.5rem; padding: 0.9rem 1.5rem;
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; background: var(--bg); z-index: 10; }
.brand { font-weight: 600; color: var(--text); text-decoration: none; }
/* Plain text beside the site name, not a badge. margin-right pushes
   everything after it to the far end. Empty when config.toml sets no
   version, and then it is not there at all. */
.version { margin-right: auto; font-size: 0.78rem; color: var(--muted); }
.version:empty { display: none; }
.theme-toggle { font: inherit; font-size: 0.8rem; cursor: pointer;
    color: var(--muted); background: none; padding: 0.25rem 0.6rem;
    border: 1px solid var(--border); border-radius: 5px; }
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
/* Each label shows only in the scheme it switches away from. */
.theme-toggle .in-dark { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .in-light { display: none; }
    :root:not([data-theme="light"]) .theme-toggle .in-dark { display: inline; }
}
:root[data-theme="dark"] .theme-toggle .in-light { display: none; }
:root[data-theme="dark"] .theme-toggle .in-dark { display: inline; }
:root[data-theme="light"] .theme-toggle .in-light { display: inline; }
:root[data-theme="light"] .theme-toggle .in-dark { display: none; }

/* two columns, one on a phone */
.layout { display: grid; grid-template-columns: 240px minmax(0, 1fr);
    gap: 3rem; max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }

/* sidebar */
/* Two parts: the tree takes the height that is going and scrolls, the
   footer under it stays where it is. Reading the attribution should not
   mean scrolling an article to the end. */
.sidebar { position: sticky; top: 4.5rem; align-self: start;
    max-height: calc(100vh - 6rem); font-size: 0.9rem;
    display: flex; flex-direction: column; }
.sidebar > ul { overflow-y: auto; flex: 1; min-height: 0; }
.sidebar ul { list-style: none; }
.sidebar > ul > li { margin-bottom: 1.2rem; }
.sidebar ul ul { margin: 0.3rem 0 0 0; padding-left: 0.8rem;
    border-left: 1px solid var(--border); }
.sidebar ul ul li { margin: 0.15rem 0; }
/* Scoped to the tree: the attribution below it is an ordinary link, not
   another row in the navigation. */
.sidebar > ul a, .sidebar > ul span { display: block;
    padding: 0.2rem 0.5rem; border-radius: 4px;
    text-decoration: none; color: var(--muted); }
.sidebar > ul > li > a, .sidebar > ul > li > span {
    color: var(--text); font-weight: 600; }
.sidebar > ul a:hover { background: var(--panel); color: var(--accent); }
.sidebar > ul a.active { background: var(--panel); color: var(--accent);
    font-weight: 600; }

/* content */
main { min-width: 0; }
article h1 { font-size: 2rem; line-height: 1.25; margin-bottom: 1.2rem; }
article h2 { font-size: 1.35rem; margin: 2.2rem 0 0.8rem;
    padding-top: 0.6rem; border-top: 1px solid var(--border); }
article h3 { font-size: 1.1rem; margin: 1.6rem 0 0.5rem; }
article p, article ul, article ol { margin-bottom: 1.1rem; }
article ul, article ol { padding-left: 1.4rem; }
article a { color: var(--accent); }
article time { display: block; color: var(--muted); font-size: 0.85rem;
    margin: -0.6rem 0 1.6rem; }
.lede { color: var(--muted); font-size: 1.1rem; }
table { border-collapse: collapse; width: 100%; margin-bottom: 1.2rem;
    display: block; overflow-x: auto; }
th, td { border: 1px solid var(--border); padding: 0.5rem 0.8rem;
    text-align: left; }
th { background: var(--panel); }
pre { background: var(--code-bg); border: 1px solid var(--border);
    border-radius: 6px; padding: 1rem; overflow-x: auto;
    margin-bottom: 1.2rem; font-size: 0.88rem; line-height: 1.5; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.88em; }
:not(pre) > code { background: var(--code-bg); padding: 0.15em 0.4em;
    border-radius: 4px; }
blockquote { border-left: 3px solid var(--accent); background: var(--panel);
    padding: 0.8rem 1rem; margin-bottom: 1.2rem; color: var(--muted); }

/* table of contents on the landing page */
.contents { margin-top: 2.5rem; }
.contents h2 { font-size: 0.85rem; text-transform: uppercase;
    letter-spacing: 0.06em; color: var(--muted); margin-bottom: 0.8rem; }
.contents ul { list-style: none; }
.contents > ul > li { padding: 0.7rem 0;
    border-bottom: 1px solid var(--border); }
.contents > ul > li > a, .contents > ul > li > span {
    font-weight: 600; font-size: 1.05rem; color: var(--text);
    text-decoration: none; }
.contents > ul > li > a:hover { color: var(--accent); }
.contents ul ul { display: flex; flex-wrap: wrap; gap: 0.3rem 1.2rem;
    margin-top: 0.35rem; }
.contents ul ul a { color: var(--muted); text-decoration: none;
    font-size: 0.9rem; }
.contents ul ul a:hover { color: var(--accent); }

/* footer navigation */
.post-nav { display: flex; gap: 1rem; margin-top: 3rem; }
.post-nav a { flex: 1; max-width: 50%; padding: 0.8rem 1rem;
    border: 1px solid var(--border); border-radius: 6px;
    color: var(--accent); text-decoration: none; font-size: 0.9rem; }
.post-nav a:hover { background: var(--panel); }
.post-nav a:empty { display: none; }
.post-nav .prev::before { content: "\2190  "; }
.post-nav .next { margin-left: auto; text-align: right; }
.post-nav .next::after { content: "  \2192"; }
/* empty when config.toml sets no edit_url */
.edit { display: inline-block; margin-top: 2rem; font-size: 0.85rem;
    color: var(--muted); }
.edit[href=""] { display: none; }

/* Callouts. The label is CSS, not markup. */
.callout { border-left: 3px solid var(--border);
    background: var(--panel); padding: 0.9rem 1rem;
    margin-bottom: 1.2rem; border-radius: 0 5px 5px 0; }
.callout::before { display: block; font-size: 0.72rem;
    font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.06em; margin-bottom: 0.35rem; }
.callout > :last-child { margin-bottom: 0; }
.callout-note { border-left-color: var(--cal-note); }
.callout-note::before { content: "Note"; color: var(--cal-note); }
.callout-tip { border-left-color: var(--cal-tip); }
.callout-tip::before { content: "Tip"; color: var(--cal-tip); }
.callout-important { border-left-color: var(--cal-important); }
.callout-important::before { content: "Important"; color: var(--cal-important); }
.callout-warning { border-left-color: var(--cal-warning); }
.callout-warning::before { content: "Warning"; color: var(--cal-warning); }
.callout-caution { border-left-color: var(--cal-caution); }
.callout-caution::before { content: "Caution"; color: var(--cal-caution); }

/* Pinned to the foot of the sidebar, outside the part that scrolls.
   No rule above it: in a column this narrow the gap says enough.
   Empty when built_with is off, and then it takes no room. */
.site-footer { flex-shrink: 0; margin-top: 1.4rem; font-size: 0.75rem;
    line-height: 1.4; letter-spacing: 0.01em; color: var(--muted); }
.site-footer:empty { display: none; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }

/* Phone layout. This block has to come last: it unsets the sticky
   positioning above, and at equal specificity the later rule wins. */
@media (max-width: 800px) {
    .layout { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 1.5rem; }
    .sidebar { position: static; max-height: none; overflow: visible;
        border-bottom: 1px solid var(--border);
        padding-bottom: 1.2rem; margin-bottom: 0.5rem; }
    .sidebar > ul { overflow: visible; }
    .sidebar > ul > li { margin-bottom: 0.9rem; }
    .site-footer { margin-top: 0.9rem; }
    article h1 { font-size: 1.6rem; }
    .post-nav { flex-direction: column; }
    .post-nav a { max-width: none; }
    .post-nav .next { margin-left: 0; }
}