/* The documentation site's stylesheet. html.sh wraps mandoc's HTML for
 * each man page in the layout styled here; the classes below the layout
 * (Sh, Ss, Pp, Bd-indent, Bl-tag, Bl-bullet, tbl) are the ones mandoc
 * gives man(7) pages, and the only ones these pages use.
 *
 * Colours are tokens, set once for light and once for dark. */

:root {
  --bg: #ffffff;
  --surface: #f5f7fa;
  --fg: #1c2127;
  --muted: #5d6773;
  --border: #e2e6eb;
  --accent: #2160c4;
  --accent-soft: #e8f0fc;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --bar: 3.5rem;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b;
    --surface: #1c2025;
    --fg: #e4e7eb;
    --muted: #9aa4af;
    --border: #2b3037;
    --accent: #7eaaf5;
    --accent-soft: #1d2a3d;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

html { scroll-padding-top: calc(var(--bar) + 1rem); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 var(--sans);
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px;
    text-underline-offset: 0.15em; text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent); }
a:hover { text-decoration-color: currentColor; }

/* ---- Layout ----------------------------------------------------------- */

.topbar {
  position: sticky; top: 0; z-index: 10;
  height: var(--bar);
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner, .layout, .site-footer-inner, .landing {
  max-width: 72rem; margin: 0 auto; padding: 0 1.25rem;
}
.topbar-inner { height: 100%; display: flex; align-items: center; gap: 1.5rem; }
.brand { font-weight: 650; color: var(--fg); text-decoration: none; white-space: nowrap; }
.brand .version { font-weight: 500; color: var(--muted); font-size: 0.85em; margin-left: 0.35rem; }
.topnav { display: flex; gap: 0.25rem; margin-left: auto; overflow-x: auto; }
.topnav a {
  color: var(--muted); text-decoration: none; padding: 0.35rem 0.65rem; border-radius: 6px;
  font-size: 0.925rem; white-space: nowrap;
}
.topnav a:hover { color: var(--fg); background: var(--surface); }
.topnav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }

.layout { display: grid; grid-template-columns: 13rem minmax(0, 1fr); gap: 3rem; }

.toc {
  position: sticky; top: var(--bar); align-self: start;
  max-height: calc(100vh - var(--bar)); overflow-y: auto;
  padding: 2rem 0 2rem; font-size: 0.875rem;
}
.toc-title { margin: 0 0 0.5rem; color: var(--muted); font-size: 0.75rem;
             font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc ul ul { padding-left: 0.85rem; }
.toc a { display: block; padding: 0.2rem 0.5rem; margin-left: -0.5rem; border-radius: 5px;
         color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--fg); background: var(--surface); }
/* Section names are capitals in a man page: shown in sentence case. The
 * site's own headings (keep-case) are written as they should appear. */
.toc .toc-sh:not(.keep-case) > a { text-transform: lowercase; }
.toc .toc-sh:not(.keep-case) > a::first-letter { text-transform: uppercase; }

.page { padding: 2.25rem 0 4rem; max-width: 46rem; }
.page.wide { max-width: 60rem; }
.page-title { font-size: 2rem; line-height: 1.2; margin: 0; font-weight: 700; letter-spacing: -0.01em; }
.page-title .mansect { color: var(--muted); font-weight: 500; }
.page-desc { margin: 0.4rem 0 0; color: var(--muted); font-size: 1.125rem; }
.page-desc::first-letter { text-transform: uppercase; }

.site-footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 0.85rem; }
.site-footer-inner { padding-top: 1.25rem; padding-bottom: 2rem; }

@media (max-width: 56rem) {
  /* The bar wraps, the links below the name, and scrolls away with the
   * page: its height now depends on the width, so it cannot stick. */
  :root { --bar: 0rem; }
  .topbar { position: static; height: auto; }
  .topbar-inner { flex-wrap: wrap; gap: 0.25rem 0.75rem; padding-top: 0.6rem; padding-bottom: 0.6rem; }
  .topnav { flex-wrap: wrap; margin-left: -0.65rem; width: calc(100% + 0.65rem); overflow: visible; }
  .layout { display: block; }
  .toc { display: none; }
  .page { padding-top: 1.5rem; }
  .page-title { font-size: 1.6rem; }
  table.tbl td:first-child { white-space: normal; }
}

/* ---- The man page, as mandoc writes it -------------------------------- */

.manual-text { margin-top: 1rem; }

section.Sh { margin-top: 2.25rem; }
h1.Sh {
  font-size: 1.35rem; line-height: 1.3; font-weight: 650; margin: 0 0 0.6rem;
  padding-top: 1.25rem; border-top: 1px solid var(--border);
  text-transform: lowercase;
}
h1.Sh::first-letter { text-transform: uppercase; }
h1.Sh.keep-case { text-transform: none; }
section.Sh:first-child { margin-top: 1.5rem; }
h2.Ss { font-size: 1.075rem; font-weight: 650; margin: 1.75rem 0 0.4rem; }
a.permalink { color: inherit; text-decoration: none; }
h1.Sh a.permalink:hover::after, h2.Ss a.permalink:hover::after {
  content: " #"; color: var(--muted); font-weight: 400;
}

.Pp { margin: 0.7rem 0; }
.Pp:empty { display: none; }
b { font-weight: 620; }

.Bd-indent { margin: 0.9rem 0; }
pre {
  margin: 0; padding: 0.85rem 1rem; overflow-x: auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  font: 0.85rem/1.55 var(--mono); tab-size: 4;
}

dl.Bl-tag { margin: 0.75rem 0; }
dl.Bl-tag > dt {
  margin-top: 1rem; font-family: var(--mono); font-size: 0.9rem;
}
dl.Bl-tag > dt:first-child { margin-top: 0; }
dl.Bl-tag > dt b { font-weight: 600; }
dl.Bl-tag > dt i { color: var(--muted); }
dl.Bl-tag > dd { margin: 0.15rem 0 0 1.5rem; }
dl.Bl-tag > dd > .Pp:first-child { margin-top: 0; }
.dt-where { font-family: var(--sans); font-size: 0.8rem; color: var(--muted); margin-left: 0.5rem; }
.steps { color: var(--muted); font-size: 0.875rem; }
.where { margin-top: -0.25rem; color: var(--muted); font-size: 0.875rem; }

ul.Bl-bullet { margin: 0.7rem 0; padding-left: 1.25rem; }
ul.Bl-bullet > li { margin: 0.35rem 0; }
ul.Bl-bullet > li::marker { color: var(--muted); }

table.tbl {
  display: block; max-width: 100%; overflow-x: auto;
  border-collapse: collapse; margin: 0.9rem 0; font-size: 0.925rem;
}
table.tbl td { padding: 0.4rem 1.25rem 0.4rem 0; border-bottom: 1px solid var(--border);
               vertical-align: top; }
table.tbl tr:last-child td { border-bottom: 0; }
table.tbl td:first-child { color: var(--muted); white-space: nowrap; }

/* ---- The landing page ------------------------------------------------- */

.landing { padding-top: 3.5rem; padding-bottom: 4rem; }
.hero { max-width: 44rem; }
.hero h1 { font-size: 2.6rem; line-height: 1.1; margin: 0; letter-spacing: -0.02em; }
.hero .tagline { font-size: 1.25rem; color: var(--muted); margin: 0.75rem 0 0; }
.hero .tagline::first-letter { text-transform: uppercase; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.75rem; }
.button {
  display: inline-block; padding: 0.55rem 1rem; border-radius: 8px; font-weight: 600;
  text-decoration: none; border: 1px solid var(--border); color: var(--fg); background: var(--bg);
}
.button:hover { background: var(--surface); }
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.button.primary:hover { background: color-mix(in srgb, var(--accent) 88%, var(--fg)); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
         gap: 1rem; margin-top: 3rem; }
.card {
  display: block; padding: 1.1rem 1.25rem; border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); box-shadow: var(--shadow); color: var(--fg); text-decoration: none;
}
.card:hover { border-color: var(--accent); }
.card-title { font-family: var(--mono); font-weight: 600; font-size: 1rem; color: var(--accent); }
.card-desc { margin: 0.35rem 0 0; color: var(--muted); }
.card-desc::first-letter { text-transform: uppercase; }
.card-cmd { margin: 0.75rem 0 0; font: 0.8rem var(--mono); color: var(--muted); }

.shot { margin: 1rem 0 1.5rem; }
.landing .shot { margin-top: 3rem; max-width: 40rem; }
.shot img { display: block; width: 100%; height: auto;
            border-radius: 12px; border: 1px solid var(--border); }
.shot figcaption { margin-top: 0.6rem; color: var(--muted); font-size: 0.9rem; }
.shots-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
              gap: 0 1.25rem; align-items: start; }
.note { margin-top: 2.5rem; color: var(--muted); font-size: 0.9rem; }