/* ============================================================
   TYPOGRAPHY.CSS — Font System
   Passberg.org Research Domain System

   Mode A: Institutional — Inter (default, active)
   Mode B: Technical     — JetBrains Mono (swap :root values below)

   To switch mode: comment out Mode A block, uncomment Mode B block.
   No HTML restructuring required.
   ============================================================ */

/* --- Mode A: Institutional (active) --- */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500&family=JetBrains+Mono:wght@300;400&display=swap');

:root {
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;
  --tracking-wide:    0.1em;
  --tracking-widest:  0.18em;
  --tracking-label:   0.22em;
}

/* --- Mode B: Technical (inactive — uncomment to activate)

:root {
  --font-primary: 'JetBrains Mono', 'Courier New', monospace;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;
  --tracking-wide:    0.06em;
  --tracking-widest:  0.12em;
  --tracking-label:   0.16em;
}

--- */

/* --- Base Body --- */

body {
  font-family: var(--font-primary);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Small Uppercase Label --- */

.label {
  font-size: 0.65rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--accent);
  font-family: var(--font-primary);
}

/* --- Heading: Landing definition line / Paper title --- */

h1 {
  font-size: 1.15rem;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--text);
}

/* --- Heading: Volume label --- */

h2 {
  font-size: 0.65rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--accent);
  font-family: var(--font-primary);
}

/* --- Heading: Volume title --- */

h3 {
  font-size: 0.92rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--text);
}

/* --- Body paragraph --- */

p {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* --- Abstract (paper view) --- */

p.abstract {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* --- DOI (monospace) --- */

.doi {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* --- Navigation --- */

nav a {
  font-size: 0.7rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  font-family: var(--font-primary);
}

/* --- Timeline year/name --- */

.timeline-year {
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text);
  font-family: var(--font-primary);
}