/* Shared site navigation for the interactive lab and field guide. */
.site-header {
  --ink: #171713;
  --muted: #6c6d66;
  --paper: #f1efe7;
  --panel: #fbfaf5;
  --line: #d4d0c3;
  --line-strong: #aaa69a;
  min-height: 68px;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  position: sticky;
  top: 0;
  z-index: 10;
  isolation: isolate;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

html[data-theme="dark"] .site-header {
  --ink: #f1f0e8;
  --muted: #a8aaa2;
  --paper: #171916;
  --panel: #20231f;
  --line: #3a4039;
  --line-strong: #687066;
  background: rgba(23, 25, 22, .94);
}

.site-header .site-brand {
  min-height: 0;
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  text-decoration: none;
  font: 400 14px/1.6 "Manrope", system-ui, sans-serif;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-header .site-brand span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--panel);
  background: var(--ink);
  border-radius: 0;
  font: 500 11px/1 "DM Mono", monospace;
  letter-spacing: 0;
}

.site-header .site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-header .site-nav a {
  min-height: 32px;
  padding: 7px 9px;
  display: inline-flex;
  align-items: center;
  border: 1px solid transparent;
  border-radius: 0;
  color: var(--muted);
  background: transparent;
  font: 600 10px/1.4 "DM Mono", monospace;
  letter-spacing: .04em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header .site-nav a:hover {
  color: var(--ink);
  border-color: var(--line);
  background: var(--panel);
}

.site-header .site-nav a[aria-current="page"] {
  color: var(--ink);
  border-color: var(--line);
  background: var(--panel);
  font-weight: 600;
}

.site-header .github-repo {
  margin-left: 0;
}

.site-header .theme-toggle {
  min-width: 0;
  min-height: 32px;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--muted);
  background: transparent;
  font: 500 10px/1.4 "DM Mono", monospace;
  letter-spacing: .04em;
  white-space: nowrap;
}

.site-header .theme-toggle:hover,
.site-header .theme-toggle[aria-pressed="true"] {
  color: var(--ink);
  border-color: var(--line-strong);
  background: var(--panel);
}

@media (max-width: 1180px) {
  .site-header .github-repo {
    display: none;
  }
}

@media (max-width: 900px) {
  .site-header {
    min-height: 0;
    padding: 10px 20px;
    flex-wrap: wrap;
    gap: 10px;
  }
}

@media (max-width: 720px) {
  .site-header {
    padding: 10px 14px;
  }

  .site-header .site-brand strong {
    font-size: 13px;
  }

  .site-header .site-nav a {
    padding-inline: 7px;
    font-size: 9px;
  }

  .site-header .theme-toggle {
    padding-inline: 7px;
    font-size: 9px;
  }
}

@media (max-width: 540px) {
  .site-header .site-brand strong {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}