/* bonSQL website. Colours from the logo: navy #0E2A55, database blue #1E7FE0, light blue #3EC6F8.
   The header and hero stay navy in both themes; the page body follows the visitor's light or dark setting. */
:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --fg: #172233;
  --muted: #586579;
  --line: #dce3ed;
  --navy: #0e2a55;
  --navy-deep: #091d3d;
  --accent: #1e7fe0;
  --sky: #3ec6f8;
  --link: #1460b8;
  --tag-bg: #fff3d1;
  --tag-fg: #6f4c00;
  --code-bg: #edf1f7;
  --absent: #8a95a6;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1624;
    --surface: #141e2e;
    --fg: #e3e9f2;
    --muted: #9ba8bb;
    --line: #26334a;
    --link: #74bcff;
    --tag-bg: #3a2d0e;
    --tag-fg: #f0c96a;
    --code-bg: #1b2638;
    --absent: #7d899b;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}
img { max-width: 100%; height: auto; }
a { color: var(--link); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--surface); padding: 0.5rem 1rem; z-index: 10; }
.wrap { max-width: 68rem; margin: 0 auto; padding-inline: 1.25rem; }

/* header */
.site-header { background: var(--navy); color: #fff; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-block: 0.7rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: #fff; text-decoration: none; }
.wordmark { font-size: 1.45rem; font-weight: 700; letter-spacing: -0.01em; }
.wordmark span { color: var(--sky); }
.site-header nav { display: flex; gap: 0.25rem; flex-wrap: wrap; }
.site-header nav a { color: #dce7f7; text-decoration: none; padding: 0.35rem 0.75rem; border-radius: 6px; }
.site-header nav a:hover { background: rgba(255, 255, 255, 0.1); color: #fff; }
.site-header nav a[aria-current="page"] { color: #fff; box-shadow: inset 0 -2px 0 var(--sky); border-radius: 0; }

/* home */
.hero { background: linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%); color: #fff; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2rem; align-items: center; padding-block: 3.5rem 4rem; }
.hero h1 { font-size: clamp(2rem, 4.5vw, 3rem); line-height: 1.15; margin: 0 0 1rem; text-wrap: balance; }
.lede { font-size: 1.2rem; color: #d3def0; max-width: 38rem; margin: 0 0 1.5rem; }
.fineprint { color: #a9b9d3; font-size: 0.9rem; margin: 1rem 0 0; }
.hero-mark img { width: 160px; height: 160px; opacity: 0.95; }
.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin: 0; }
.button { display: inline-block; padding: 0.6rem 1.2rem; border-radius: 6px; border: 1px solid rgba(255, 255, 255, 0.45);
  color: #fff; text-decoration: none; font-weight: 600; }
.button:hover { background: rgba(255, 255, 255, 0.1); }
.button.primary { background: var(--accent); border-color: var(--accent); }
.button.primary:hover { background: #2a8cf0; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1.5rem 2rem; padding-block: 3rem 1rem; }
.feature h2 { font-size: 1.05rem; margin: 0 0 0.35rem; }
.feature h2::before { content: ""; display: inline-block; width: 0.55rem; height: 0.55rem; background: var(--accent);
  border-radius: 2px; margin-right: 0.55rem; vertical-align: 0.12em; }
.feature p { margin: 0; color: var(--muted); }
.home-body { padding-block: 1rem 3rem; }

/* prose */
.page { padding-block: 2.25rem 3.5rem; }
.prose > * { max-width: 46rem; }
.prose > pre, .prose > table { max-width: 52rem; }
.prose h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 1rem; text-wrap: balance; }
.prose h2 { font-size: 1.3rem; margin: 2rem 0 0.5rem; text-wrap: balance; }
.prose h3 { font-size: 1.05rem; margin: 1.5rem 0 0.35rem; }
.prose li + li { margin-top: 0.25rem; }
.prose code { font-family: Consolas, "Cascadia Mono", ui-monospace, monospace; font-size: 0.92em; background: var(--code-bg);
  padding: 0.1em 0.35em; border-radius: 4px; }
.prose pre { background: var(--code-bg); padding: 0.9rem 1rem; border-radius: 6px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; }
.prose table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; }
.prose th, .prose td { text-align: left; vertical-align: top; padding: 0.45rem 0.75rem 0.45rem 0; border-bottom: 1px solid var(--line); }
.prose th { font-weight: 600; white-space: nowrap; }
.prose kbd { font-family: inherit; font-size: 0.88em; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 4px;
  padding: 0.05em 0.4em; background: var(--surface); white-space: nowrap; }
.prose img { display: block; margin: 1rem 0 1.25rem; border: 1px solid var(--line); border-radius: 6px;
  box-shadow: 0 1px 3px rgba(9, 29, 61, 0.12); }
.prose blockquote { margin: 1rem 0; padding: 0.1rem 1rem; border-left: 3px solid var(--accent); color: var(--muted); }

/* help */
.help-index { padding-block: 2.25rem 3.5rem; }
.help-group { margin-top: 2rem; }
.help-group h2 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted);
  border-bottom: 1px solid var(--line); padding-bottom: 0.4rem; margin: 0 0 0.6rem; }
.help-group ul { list-style: none; margin: 0; padding: 0; columns: 2 22rem; column-gap: 2.5rem; }
.help-group li { break-inside: avoid; padding: 0.3rem 0; }
.help-group .sum { display: block; color: var(--muted); font-size: 0.9rem; line-height: 1.4; }
.help-group.absent a { color: var(--absent); }
.tag { font-size: 0.72rem; font-weight: 600; background: var(--tag-bg); color: var(--tag-fg); padding: 0.1rem 0.45rem;
  border-radius: 999px; margin-left: 0.35rem; vertical-align: 0.1em; white-space: nowrap; }
.crumbs { font-size: 0.9rem; color: var(--muted); margin: 0 0 0.5rem; }
.notice { background: var(--tag-bg); color: var(--tag-fg); padding: 0.75rem 1rem; border-radius: 6px; }
.related-h { font-size: 1rem; }
.related { padding-left: 1.2rem; }

/* gallery */
.gallery-page { padding-block: 2.25rem 3.5rem; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 30rem), 1fr)); gap: 2rem 1.75rem; margin-top: 1.5rem; }
.shot { margin: 0; min-width: 0; }
.shot img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 6px;
  box-shadow: 0 1px 3px rgba(9, 29, 61, 0.12); }
.shot figcaption { color: var(--muted); font-size: 0.92rem; margin-top: 0.5rem; }
.shot .alt { margin-left: 0.4rem; white-space: nowrap; }

/* footer */
.site-footer { border-top: 1px solid var(--line); color: var(--muted); padding-block: 1.75rem 2.5rem; font-size: 0.92rem; }
.site-footer p { margin: 0 0 0.5rem; max-width: 52rem; }
.site-footer .small { font-size: 0.82rem; }

@media (max-width: 40rem) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); padding-block: 2.5rem 3rem; }
  .hero-mark { display: none; }
}