/* Shared by the explorer, the documentation and the references page.

   Iceland: glacial meltwater and black basalt in daylight, basalt and the aurora at night. The
   trace and the selected line carry the only information colour encodes; measured lines are marked
   in neutral ink, so they read as a third thing without a third hue. */
:root {
  /* Iceland, in daylight: glacial meltwater, black basalt, a glacier-blue trace and volcanic rust
     for the selected line. The two mark colours are validated for colour-vision deficiency
     (protan dE 18.8) and every text colour clears 4.5:1 on both surfaces. */
  --ground: #e9eff3; --surface: #ffffff; --surface-2: #f4f8fa;
  --ink: #0e1f28; --ink-2: #3c525d; --ink-3: #5c7480;
  --rule: #cfdde4; --rule-2: #e3ecf0;
  --accent: #0070a0; --accent-soft: #dceaf2;
  --trace: #0070a0; --trace-fill: rgba(0, 112, 160, 0.13); --pick: #c0306a; --mark: #2b3f49;
  /* the three kinds of line: measured to sub-Doppler precision, measured in an FTS atlas, model only.
     The two measured hues and the selection pass the CVD check (worst ΔE 10, protan); the model-only
     lines are grey on purpose, the unmeasured background the measurements stand out from. */
  --cls-precision: #b87400; --cls-atlas: #0070a0; --cls-model: #8a9ba5;
  --good: #1b6b4a; --good-bg: #dcefe5; --warn: #7a5109; --warn-bg: #f7eed8;
  --bad: #a63328; --bad-bg: #f8e3e0; --none: #55636b; --none-bg: #e6ecef;
  --display: "Barlow Semi Condensed", "Arial Narrow", sans-serif;
  --body: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  /* Iceland at night: basalt, with the aurora for the marks -- green trace, violet selection.
     Green against violet separates far better than green against orange under deuteranopia
     (dE 14.1), which is why the dark palette is not simply the light one inverted. */
  --ground: #0b1114; --surface: #131c20; --surface-2: #19242a;
  --ink: #e4eef1; --ink-2: #a7bcc3; --ink-3: #8ba2ab;
  --rule: #28363d; --rule-2: #1e2a30;
  --accent: #6fd3ac; --accent-soft: #14312a;
  --trace: #39a882; --trace-fill: rgba(57, 168, 130, 0.20); --pick: #d9588a; --mark: #d3dee2;
  --cls-precision: #bd8a1c; --cls-atlas: #3a98cc; --cls-model: #6f8590;
  --good: #57c795; --good-bg: #123027; --warn: #dfae5b; --warn-bg: #33280f;
  --bad: #ef8279; --bad-bg: #3a1b1c; --none: #9fb2ba; --none-bg: #232f35;
} }
:root[data-theme="dark"] {
  /* Iceland at night: basalt, with the aurora for the marks -- green trace, violet selection.
     Green against violet separates far better than green against orange under deuteranopia
     (dE 14.1), which is why the dark palette is not simply the light one inverted. */
  --ground: #0b1114; --surface: #131c20; --surface-2: #19242a;
  --ink: #e4eef1; --ink-2: #a7bcc3; --ink-3: #8ba2ab;
  --rule: #28363d; --rule-2: #1e2a30;
  --accent: #6fd3ac; --accent-soft: #14312a;
  --trace: #39a882; --trace-fill: rgba(57, 168, 130, 0.20); --pick: #d9588a; --mark: #d3dee2;
  --cls-precision: #bd8a1c; --cls-atlas: #3a98cc; --cls-model: #6f8590;
  --good: #57c795; --good-bg: #123027; --warn: #dfae5b; --warn-bg: #33280f;
  --bad: #ef8279; --bad-bg: #3a1b1c; --none: #9fb2ba; --none-bg: #232f35;
}

/* navigation between the three pages */
.site-nav { display: flex; gap: 2px; align-items: baseline; }
.site-nav a { font: 500 13px/1 var(--body); color: var(--ink-2); text-decoration: none; padding: 5px 9px; border-radius: 6px; }
.site-nav a:hover { color: var(--accent); background: var(--surface-2); }
.site-nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }