/* imodels documentation styling.
 *
 * Every page links this file, generated and hand-written alike, so the two
 * cannot drift apart. pdoc's own stylesheet still handles the two-column
 * layout; this file sets the palette, the type and the navbar on top of it.
 */

:root {
  --ink: #1b1f23;
  --muted: #6a737d;
  --line: #e3e6e8;
  --line-soft: #eef1f2;
  --accent: #0b6ea8;
  --accent-dark: #084d75;
  --surface: #ffffff;
  --surface-alt: #f7f9fa;
  --code-bg: #f4f6f8;
}

body {
  color: var(--ink);
  background: var(--surface);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  line-height: 1.62;
}

/* one link colour everywhere, rather than a different one per page */
a, a:visited { color: var(--accent); text-decoration: none; }
a:hover, a:focus { color: var(--accent-dark); text-decoration: underline; }

h1, h2, h3, h4, h5 { color: var(--ink); font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 2.1em; line-height: 1.15; }
h2 { font-size: 1.5em; margin: 1.9em 0 0.6em; padding-bottom: 0.25em;
     border-bottom: 1px solid var(--line-soft); }
h3 { font-size: 1.15em; margin: 1.5em 0 0.5em; }

/* ---------- navbar ---------- */
#site-header {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.35rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
}
#site-header .nav-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  color: var(--muted); background: transparent;
  border: 1px solid transparent; flex: 0 0 auto;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
#site-header .nav-icon:hover {
  background: var(--surface-alt); color: var(--accent);
  border-color: var(--line); text-decoration: none;
}
#site-header .nav-icon svg { width: 18px; height: 18px; display: block; }
/* the logo sits on the right, next to the github icon, at icon scale */
#site-logo { flex: 0 0 auto; line-height: 0; margin-left: auto; opacity: 0.9;
             transition: opacity 0.15s ease; }
#site-logo:hover { opacity: 1; }
#site-logo img { height: 22px; width: auto; display: block; }
#site-tagline {
  margin: 0; min-width: 0;
  font-size: 0.8rem; line-height: 1.35; color: var(--muted);
}
@media (max-width: 760px) {
  #site-tagline { display: none; }
  #site-header { gap: 0.6rem; }
  #site-logo { margin-left: auto; }
}

/* ---------- layout ---------- */
#content { padding: 1.6em 2em 4em; }
#sidebar { padding: 1.6em 1.4em; background: var(--surface-alt);
           border-right: 1px solid var(--line); }
#sidebar h1, #sidebar h3 { font-size: 0.78rem; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--muted); font-weight: 600;
  border-bottom: 1px solid var(--line); padding-bottom: 0.35em; }
#sidebar .toc ul, #sidebar #index { font-size: 0.88rem; }
#sidebar li { margin: 0.18em 0; }

/* ---------- tables ---------- */
#content table, .article table {
  border-collapse: collapse; margin: 1.2em 0; font-size: 0.92em;
}
#content table th, #content table td,
.article table th, .article table td {
  border: 1px solid var(--line); padding: 6px 11px; text-align: left;
}
#content table th, .article table th {
  background: var(--surface-alt); font-weight: 600;
}
#content table tr:nth-child(even) td, .article table tr:nth-child(even) td {
  background: #fbfcfd;
}

/* ---------- code ---------- */
code { background: var(--code-bg); border-radius: 3px; padding: 1px 5px;
       font-size: 0.9em; }
pre { background: var(--code-bg); border: 1px solid var(--line);
      border-radius: 4px; margin: 1.1em 0; }
pre code { background: transparent; padding: 0; }

/* headings inside a <details> summary must not drop below the arrow */
summary > h1, summary > h2, summary > h3, summary > h4, summary > h5 {
  display: inline; margin: 0;
}
summary { cursor: pointer; }

/* ---------- footer ---------- */
#footer { border-top: 1px solid var(--line); color: var(--muted);
          font-size: 0.8rem; }