.site-header {
  display: flex;
  min-height: 56px;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0 max(1.25rem, calc((100vw - 1180px) / 2));
  color: #fff;
  background: var(--site-nav-bg, var(--dark, var(--forest, #14213d)));
  font: 750 0.72rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Loaded last on lab pages — keep text tokens AA on paper. */
:root {
  --muted: #4a5363;
  --accent: #2647b0;
  --signal: #b4451f;
}

.site-header a {
  text-decoration: none;
}

.site-header .site-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  min-height: 44px;
  padding: 0.35rem 0;
  color: #fff;
  letter-spacing: 0.11em;
}

.site-header .site-brand:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.site-header nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0 0.7rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: #e8ebf4;
  white-space: nowrap;
}

.site-header nav a:hover {
  color: #fff;
  border-color: color-mix(in srgb, #fff 32%, transparent);
}

.site-header nav a:focus-visible {
  color: #fff;
  border-color: color-mix(in srgb, #fff 55%, transparent);
  outline: 2px solid #fff;
  outline-offset: 3px;
}

.site-header nav a[aria-current="page"] {
  color: #fff;
  border-color: color-mix(in srgb, #fff 55%, transparent);
  background: color-mix(in srgb, #fff 10%, transparent);
}

@media (max-width: 900px) {
  .site-header {
    flex-wrap: wrap;
    min-height: 0;
    padding-top: 0.65rem;
    padding-bottom: 0.65rem;
  }

  .site-header nav {
    flex-wrap: wrap;
    width: 100%;
    gap: 0.15rem;
  }

  .site-header nav a {
    min-height: 44px;
    padding: 0 0.55rem;
  }
}

/*
 * Hero callouts: short label + sentence.
 * Important: do NOT reuse .thesis — that class is the dark body callout block.
 */
.hero-aside.callout,
.hero-stat.callout {
  color: var(--ink, #161d2d);
  background: transparent;
  border-radius: 0;
  box-shadow: none;
  padding: 1.5rem 0;
  border-top: 5px solid var(--signal, #b4451f);
  border-bottom: 1px solid var(--line, #d9ddd9);
}

.hero-aside.callout strong,
.hero-stat.callout strong {
  display: block;
  color: var(--dark, var(--forest, #121a35));
  font: 800 clamp(1.35rem, 2.6vw, 1.95rem) / 1.15 Georgia, "Times New Roman",
    serif;
  letter-spacing: -0.03em;
}

.hero-aside.callout span,
.hero-stat.callout span {
  display: block;
  margin-top: 0.85rem;
  color: var(--muted, #4a5363);
  font-size: 0.9rem;
}

/* Disclosure labels failed AA at #e66a3c on paper; darken for small caps. */
.disclosure strong,
aside[role="note"] > strong {
  color: #b4451f !important;
}

@media print {
  .site-header {
    display: none;
  }
}
.toc a {
  align-items: baseline;
}

.token-table th:first-child,
.token-table td:first-child {
  width: 12rem;
  white-space: nowrap;
  text-align: right;
  font-variant-numeric: tabular-nums;
}