/* Bourdon landing page (formerly Continuo, renamed 2026-05-05)
 *
 * Aesthetic choices:
 *  - Plain HTML+CSS, no JavaScript, no web-font fetch (system font stack).
 *  - Single accent color (deep navy #1f3a52).
 *  - Single column, max-width 700px, centered.
 *  - Long-form prose-driven; no marketing-page flourish.
 *  - Reads cleanly on phone, tablet, desktop without media queries:
 *    the 700px cap + relative units handle reflow naturally.
 */

:root {
  --bg: #fafaf7;
  --ink: #1a1a1a;
  --muted: #555;
  --accent: #1f3a52;
  --rule: #d8d4c8;
  --code-bg: #f1eee5;
  --max-col: 42rem;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

main {
  max-width: var(--max-col);
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
}

/* Hero */

.hero {
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0 0 0.75rem 0;
}

h1 {
  font-size: 3.2rem;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  color: var(--accent);
}

.tagline {
  font-size: 1.15rem;
  color: var(--muted);
  margin: 0;
  font-style: italic;
}

/* Sections */

section {
  margin-top: 3rem;
}

h2 {
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  font-weight: 600;
  margin: 0 0 1rem 0;
  color: var(--accent);
}

p {
  margin: 0 0 1rem 0;
}

p.note {
  color: var(--muted);
  font-size: 0.95rem;
  border-left: 3px solid var(--rule);
  padding-left: 1rem;
  margin-top: 1.25rem;
}

ul {
  margin: 0 0 1rem 0;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

strong { color: var(--ink); }
em { font-style: italic; }
code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9em;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover { text-decoration-thickness: 2px; }

/* Test sections -- dated eyebrows */
/* Each evidence section (OMNIvour, cross-account, cross-machine) gets a small
 * date marker above its h2. Reuses the .eyebrow type rhythm but sits inline-flush
 * with the heading rather than the hero treatment. */

.testdate {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.7rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  margin: 0 0 0.4rem 0;
}

.testdate + h2 {
  margin-top: 0;
}

/* Blockquote citation treatment */
/* Quoted evidence (Codex self-attribution, Codex.app probe responses) reads
 * as primary-source citation, not poetic flourish. Left-rule. Slight muted
 * tone. Cite line aligns right under the quote. */

blockquote {
  margin: 1.25rem 0;
  padding: 0.25rem 0 0.25rem 1.25rem;
  border-left: 3px solid var(--rule);
  color: var(--ink);
  font-style: normal;
  font-size: 0.97rem;
}

blockquote p {
  margin: 0 0 0.6rem 0;
}

blockquote p:last-child {
  margin-bottom: 0;
}

blockquote cite {
  display: block;
  margin-top: 0.75rem;
  font-style: normal;
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.01em;
}

blockquote cite::before {
  content: "\2014\00a0";  /* em-dash followed by non-breaking space */
}

/* Metric figures */
/* A single empirical anchor pulled out of prose for a beat of pause.
 * Two-column tabular layout: label on the left, measured value on the right.
 * Tabular-nums so the numbers align. Accent color carries the value. */

figure.metric {
  margin: 1.5rem 0;
  padding: 0.9rem 1.1rem;
  background: var(--code-bg);
  border-left: 3px solid var(--accent);
  border-radius: 0 3px 3px 0;
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  font-size: 0.95rem;
}

figure.metric .label {
  flex: 1;
  color: var(--muted);
}

figure.metric .value {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

figure.metric .value .delta {
  color: var(--muted);
  font-weight: 400;
  padding: 0 0.25em;
}

/* Footer philosophy line */
/* "No tracking. No JavaScript. No web fonts. Just text." is the page's
 * design philosophy stated in seven words. Give it its own beat. */

p.philosophy {
  margin-top: 1.25rem;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  font-style: italic;
}

/* Diagrams */

pre.diagram {
  background: var(--code-bg);
  padding: 1rem 1.25rem;
  border-radius: 4px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  overflow-x: auto;
  margin: 1rem 0;
  color: var(--ink);
  border-left: 3px solid var(--accent);
}

/* Comparison table */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.93rem;
}

thead th {
  text-align: left;
  border-bottom: 2px solid var(--accent);
  padding: 0.6rem 0.75rem;
  font-weight: 600;
}

tbody td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

tbody tr:last-child td {
  background: var(--code-bg);
  border-bottom: none;
}

/* Status section links */

p.links {
  font-size: 0.95rem;
  margin-top: 1rem;
}

/* Footer */

footer {
  margin-top: 5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9rem;
  color: var(--muted);
}

footer p { margin-bottom: 0.5rem; }

footer p.meta {
  margin-top: 1rem;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

/* Smaller screens -- table needs to stay readable */

@media (max-width: 37.5em) {
  main { padding: 2.5rem 1rem 4rem; }
  h1 { font-size: 2.4rem; }
  table { font-size: 0.85rem; }
  thead th, tbody td { padding: 0.5rem 0.4rem; }
}