/* ============================================================
   quantum-relaxation-ordering — shared stylesheet
   Stewards: Colla, A. & Warring, U.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:ital,wght@0,300;0,400;0,600;1,300;1,400&family=IBM+Plex+Mono:wght@300;400;500&family=Barlow+Condensed:wght@300;400;600;700&display=swap');

/* ── Variables ────────────────────────────────────────────── */
:root {
  --navy:       #0d1b2a;
  --navy-mid:   #162032;
  --navy-light: #1e2f45;
  --amber:      #d4860a;
  --amber-pale: #f0c46a;
  --cream:      #f5f0e8;
  --cream-dark: #ede7d9;
  --ink:        #1a1a1a;
  --ink-mid:    #3a3a3a;
  --ink-light:  #666;
  --rule:       #c8bfaf;
  --green-ok:   #2d6a4f;
  --red-alert:  #8b2020;
  --font-body:  'Crimson Pro', Georgia, serif;
  --font-mono:  'IBM Plex Mono', 'Courier New', monospace;
  --font-head:  'Barlow Condensed', sans-serif;
  --max-w:      860px;
  --col-gap:    2.4rem;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--ink);
  background: var(--cream);
}

/* ── Header / Nav ─────────────────────────────────────────── */
header {
  background: var(--navy);
  color: var(--cream);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.5rem;
  gap: 1rem;
}
.site-title {
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber-pale);
  white-space: nowrap;
  text-decoration: none;
}
.site-title strong {
  font-weight: 700;
  color: #fff;
}
nav {
  display: flex;
  gap: 0.15rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}
nav a {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #a8b8cc;
  text-decoration: none;
  padding: 0.3rem 0.6rem;
  border-radius: 2px;
  transition: color 0.15s, background 0.15s;
}
nav a:hover, nav a.active {
  color: #fff;
  background: var(--navy-light);
}

/* ── Status Banner ────────────────────────────────────────── */
.status-banner {
  background: var(--navy-mid);
  border-bottom: 1px solid var(--amber);
  padding: 0.4rem 1.5rem;
}
.status-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  align-items: center;
}
.status-chip {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--amber-pale);
  letter-spacing: 0.04em;
}
.status-chip .label {
  color: #6a8099;
  margin-right: 0.35em;
}
.status-chip.open { color: #7ec8a0; }
.status-chip.pending { color: #f0c46a; }
.status-chip.embargo { color: #c07a7a; }

/* ── Page Layout ──────────────────────────────────────────── */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

/* ── Section Headings ─────────────────────────────────────── */
.page-title {
  font-family: var(--font-head);
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--navy);
  line-height: 1.15;
  margin-bottom: 0.3rem;
}
.page-subtitle {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--ink-light);
  letter-spacing: 0.04em;
  margin-bottom: 2rem;
}
.section-rule {
  border: none;
  border-top: 2px solid var(--amber);
  margin: 2.5rem 0 1.8rem;
}
.section-rule.thin {
  border-top-width: 1px;
  border-color: var(--rule);
}
h2 {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 0.8rem;
}
h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink-mid);
  margin: 1.5rem 0 0.5rem;
  letter-spacing: 0.02em;
}
p { margin-bottom: 1rem; }
a { color: var(--amber); text-decoration: none; border-bottom: 1px solid var(--amber-pale); }
a:hover { color: var(--navy); border-color: var(--navy); }

/* ── Math / Code Blocks ───────────────────────────────────── */
.math-block {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  background: var(--navy);
  color: var(--amber-pale);
  border-left: 3px solid var(--amber);
  padding: 1rem 1.2rem;
  margin: 1.2rem 0;
  border-radius: 0 4px 4px 0;
  overflow-x: auto;
  line-height: 1.9;
}
code {
  font-family: var(--font-mono);
  font-size: 0.83em;
  background: var(--cream-dark);
  padding: 0.1em 0.35em;
  border-radius: 2px;
  color: var(--navy);
}
pre {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--navy);
  color: #c9d8e8;
  padding: 1.2rem 1.4rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1.2rem 0;
  line-height: 1.7;
}
pre .kw  { color: var(--amber-pale); }
pre .cm  { color: #5a7a99; font-style: italic; }
pre .st  { color: #7ec8a0; }
pre .nm  { color: #c9a0e0; }

/* ── Callout Boxes ────────────────────────────────────────── */
.callout {
  padding: 1rem 1.3rem;
  border-radius: 3px;
  margin: 1.5rem 0;
  border-left: 4px solid;
}
.callout.measure {
  background: #eef4fb;
  border-color: var(--navy);
}
.callout.measure .callout-label {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 0.4rem;
}
.callout.status-note {
  background: #fdf6e3;
  border-color: var(--amber);
}
.callout.embargo-note {
  background: #fdf0f0;
  border-color: var(--red-alert);
}
.callout.embargo-note .callout-label { color: var(--red-alert); }
.callout.open-invite {
  background: #edf7f2;
  border-color: var(--green-ok);
}
.callout-label {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
  color: var(--amber);
}

/* ── Reference List ───────────────────────────────────────── */
.ref-list { list-style: none; padding: 0; }
.ref-list li {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 0.5rem;
  align-items: start;
}
.ref-list li:last-child { border-bottom: none; }
.ref-key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--amber);
  padding-top: 0.1em;
}
.ref-body { font-size: 1rem; line-height: 1.5; }
.ref-body .ref-title { font-style: italic; }
.ref-body .ref-note {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-light);
  margin-top: 0.2rem;
}

/* ── Metadata / Stewards ──────────────────────────────────── */
.meta-block {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-light);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.8rem 1rem;
  margin-bottom: 2rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 1.2rem;
  background: var(--cream-dark);
}
.meta-block dt { color: var(--ink-mid); font-weight: 500; }
.meta-block dd { color: var(--ink); }

/* ── Chart Container ──────────────────────────────────────── */
.chart-wrap {
  background: var(--navy);
  border-radius: 6px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  position: relative;
}
.chart-caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #6a8099;
  margin-top: 0.8rem;
  line-height: 1.5;
}

/* ── Stage Cards (research programme) ────────────────────── */
.stage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 1.2rem 0;
}
.stage-card {
  background: var(--navy);
  color: var(--cream);
  border-radius: 4px;
  padding: 1.1rem 1.2rem;
}
.stage-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--amber);
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}
.stage-card h4 {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.4rem;
}
.stage-card p {
  font-size: 0.88rem;
  color: #8aaabb;
  line-height: 1.5;
  margin: 0;
}

/* ── Footer ───────────────────────────────────────────────── */
footer {
  background: var(--navy);
  color: #5a7a99;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 1.2rem 1.5rem;
  text-align: center;
  letter-spacing: 0.04em;
  line-height: 1.8;
}
footer a { color: var(--amber-pale); border: none; }
footer a:hover { color: #fff; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .page-title { font-size: 1.8rem; }
  .header-inner { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  nav { gap: 0.1rem; }
  .stage-grid { grid-template-columns: 1fr; }
}