/* ═══════════════════════════════════════════════════════════════
   THE AUGMENTED SCHOLAR — REDESIGN LAYER v3
   Loads after main.css and refinements.css.

   1. Brand mark (SVG) in the header, correct in both modes
   2. Wider prose + article header aligned to the body grid
   3. Pillar hero: legible numeral, per-pillar accent
   4. /posts/ hub + cards without 0001 dates
   5. Metadata as designed chips, not a printout
   6. Start Here: a routing page, not a wall of text
   ═══════════════════════════════════════════════════════════════ */

/* ─── 0. TOKENS ─── */
:root {
  /* Prose runs wider — 680px left too much dead margin either side */
  --width-prose: 748px;

  /* Brand mark */
  --logo-plate:      var(--blue-800);
  --logo-plate-edge: transparent;
  --logo-ink:        #FBFAF7;
  --logo-accent:     var(--gold);

  /* Discipline tracks — Okabe-Ito derived, colour-vision safe */
  --track-computational: #0072B2;
  --track-wetlab:        #067A5B;
  --track-humanities:    #B5490B;
  --track-social:        #A65784;
}

[data-theme="dark"] {
  --logo-plate:      #1D3A5C;
  --logo-plate-edge: #2E5A8A;
  --logo-ink:        #EAF1FA;
  --logo-accent:     #E3C35B;

  /* Pillar accents have to lift off a dark ground */
  --pillar-1-color: #6FA3DC;
  --pillar-2-color: #A78BFA;
  --pillar-3-color: #34D399;
  --pillar-4-color: #FBBF24;
  --pillar-5-color: #FB7185;

  --track-computational: #56B4E9;
  --track-wetlab:        #34D399;
  --track-humanities:    #F0A860;
  --track-social:        #E4A3C7;
}

/* ─── 1. BRAND MARK ─── */
.nav-logo { gap: 10px; }
.brand-mark {
  display: block; flex-shrink: 0;
  transition: transform var(--transition-fast);
}
.nav-logo:hover .brand-mark { transform: translateY(-1px); }
.nav-logo .nav-logo-text { line-height: 1.15; }
@media (max-width: 560px) {
  .nav-logo-text { display: none; }
}

/* ─── 2. ARTICLE HEADER ALIGNED TO THE BODY GRID ───
   The header used .container--prose (centred on the viewport) while the body
   used a three-column grid (centred on the grid), so the title and the text
   sat on two different left edges. This mirrors the grid exactly. */
.article-header-inner {
  max-width: calc(220px + var(--width-prose) + 260px + var(--space-12) * 3);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: grid;
  grid-template-columns: 220px var(--width-prose) 260px;
  /* Column gap reproduces the body grid's geometry. Row gap must stay 0 —
     every child sits in column 2, so a row gap would add 48px between the
     title, lead, meta and everything else on top of their own margins. */
  column-gap: var(--space-12);
  row-gap: 0;
}
.article-header-inner > * { grid-column: 2; min-width: 0; }

@media (max-width: 1200px) {
  .article-header-inner { grid-template-columns: 180px minmax(0, 1fr) 240px; }
}
@media (max-width: 1024px) {
  .article-header-inner { grid-template-columns: minmax(0, 1fr); }
  .article-header-inner > * { grid-column: 1; }
}

/* ─── 3. METADATA CHIPS ─── */
.article-meta { margin: 14px 0 26px; }
.meta-chips { display: flex; flex-wrap: wrap; gap: 7px; align-items: center; }

.meta-chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-body);
  font-size: 0.8rem; font-weight: 500; line-height: 1; letter-spacing: 0;
  padding: 6px 11px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  text-decoration: none;
  white-space: nowrap;
}
.meta-chip svg { width: 13px; height: 13px; opacity: 0.75; }
a.meta-chip {
  transition: border-color var(--transition-fast),
              color var(--transition-fast),
              background var(--transition-fast);
}
a.meta-chip:hover {
  text-decoration: none;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.meta-chip--pillar {
  background: var(--blue-50); border-color: var(--blue-100);
  color: var(--blue-800); font-weight: 600;
}
.meta-chip--pillar:hover { background: var(--blue-100); color: var(--blue-800); }
.meta-chip--track {
  background: transparent; border-style: dashed;
  color: var(--color-text-subtle);
}
.meta-chip--track:hover { border-style: solid; }

.meta-disclosure {
  display: flex; align-items: flex-start; gap: 7px;
  margin: 12px 0 0;
  font-size: 0.8rem; line-height: 1.5;
  color: var(--color-text-subtle);
}
.meta-disclosure svg {
  width: 13px; height: 13px; margin-top: 3px;
  flex-shrink: 0; opacity: 0.8;
}
.meta-disclosure-label { font-weight: 600; color: var(--color-text-muted); }

/* ─── 4. PILLAR HERO ─── */
.pillar-hero {
  position: relative;
  padding: var(--space-16) 0 var(--space-12);
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}
.pillar-hero::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--pillar-accent, var(--blue-800));
}
.pillar-hero-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-10); align-items: center;
}
.pillar-eyebrow {
  display: flex; align-items: center; gap: 12px;
  margin: 0 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase;
}
.pillar-eyebrow-num { color: var(--pillar-accent, var(--blue-800)); font-weight: 600; }
.pillar-eyebrow-rule {
  flex: 0 0 32px; height: 1px;
  background: var(--pillar-accent, var(--blue-800)); opacity: 0.45;
}
.pillar-eyebrow-count { color: var(--color-text-subtle); }
.pillar-title { font-size: clamp(2rem, 4.2vw, 2.85rem); margin-bottom: var(--space-4); }
.pillar-description { max-width: 62ch; margin-bottom: var(--space-6); }

/* The numeral is an outline on purpose — decorative by design, rather than a
   solid colour faded until it reads as a rendering fault. Full-strength
   accent stroke, so it is equally legible on paper and on ink. */
.pillar-hero-mark {
  display: flex; flex-direction: column; align-items: center; gap: var(--space-2);
  color: var(--pillar-accent, var(--blue-800));
}
.pillar-hero-mark .pillar-icon { opacity: 0.9; }
.pillar-hero-numeral {
  font-family: var(--font-heading);
  font-size: clamp(3.5rem, 9vw, 6rem);
  font-weight: 800; line-height: 0.9;
  letter-spacing: var(--tracking-tight);
  color: transparent;
  -webkit-text-stroke: 2px var(--pillar-accent, var(--blue-800));
  paint-order: stroke fill;
}
@supports not ((-webkit-text-stroke: 2px currentColor)) {
  .pillar-hero-numeral { color: var(--pillar-accent, var(--blue-800)); opacity: 0.4; }
}
@media (max-width: 720px) {
  .pillar-hero-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .pillar-hero-mark { flex-direction: row; align-items: baseline; gap: var(--space-4); order: -1; }
  .pillar-hero-numeral { font-size: 3rem; }
}

/* ─── 5. /posts/ HUB ─── */
.hub-hero {
  padding: var(--space-16) 0 var(--space-12);
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}
.hub-hero-inner { max-width: 72ch; }
.hub-title {
  font-size: clamp(2.1rem, 4.5vw, 3rem); font-weight: 800;
  letter-spacing: var(--tracking-tight); margin-bottom: var(--space-4);
}
.hub-description {
  font-size: var(--text-lg); color: var(--color-text-muted);
  line-height: var(--leading-loose); margin-bottom: var(--space-6);
}
.hub-stats {
  display: flex; flex-wrap: wrap; gap: var(--space-8);
  margin: 0; padding: var(--space-5) 0 0;
  border-top: 1px solid var(--color-border);
}
.hub-stats li { display: flex; flex-direction: column; gap: 2px; }
.hub-stats strong {
  font-family: var(--font-heading); font-size: var(--text-2xl);
  font-weight: 800; color: var(--color-text); line-height: 1;
}
.hub-stats span { font-size: var(--text-xs); color: var(--color-text-subtle); letter-spacing: 0.03em; }

.hub-pillars { padding: var(--space-12) 0 0; }
.pillar-route-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(252px, 1fr));
  gap: var(--space-5);
}
.pillar-route {
  position: relative; display: flex; flex-direction: column;
  padding: var(--space-6) var(--space-5) var(--space-5);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none; overflow: hidden;
  transition: border-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
}
.pillar-route::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 3px;
  background: var(--pillar-accent); opacity: 0.85;
}
.pillar-route:hover {
  text-decoration: none; transform: translateY(-2px);
  border-color: var(--pillar-accent); box-shadow: var(--shadow-md);
}
.pillar-route-icon { color: var(--pillar-accent); margin-bottom: var(--space-3); }
.pillar-route-num {
  position: absolute; top: var(--space-4); right: var(--space-5);
  font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.08em;
  color: var(--pillar-accent); opacity: 0.7;
}
.pillar-route-title {
  font-family: var(--font-heading); font-size: var(--text-lg); font-weight: 700;
  color: var(--color-text); margin: 0 0 var(--space-2); line-height: 1.3;
}
.pillar-route-desc {
  font-size: var(--text-sm); color: var(--color-text-muted);
  line-height: 1.55; margin: 0 0 var(--space-4); flex: 1;
}
.pillar-route-meta { font-size: var(--text-xs); font-weight: 600; color: var(--pillar-accent); }

/* Cards: section cards show a count and an arrow, never a 0001 date */
.card-article-meta { align-items: center; }
.card-article-go { margin-left: auto; color: var(--color-text-subtle); }
.card-article:hover .card-article-go { color: var(--color-accent); }

/* ─── 6. START HERE ─── */
.start-hero {
  padding: var(--space-20) 0 var(--space-16);
  background:
    radial-gradient(120% 120% at 12% 0%, var(--blue-50) 0%, transparent 58%),
    var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}
.start-hero-inner { max-width: 68ch; }
.start-eyebrow {
  display: inline-block; margin: 0 0 var(--space-4);
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--gold-deep);
  padding: 5px 12px; border-radius: 999px;
  background: var(--gold-tint);
  border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
}
.start-title {
  font-family: var(--font-heading);
  font-size: clamp(2.15rem, 5vw, 3.15rem); font-weight: 800;
  line-height: 1.12; letter-spacing: var(--tracking-tight);
  color: var(--color-text); margin: 0 0 var(--space-5);
}
.start-lead {
  font-size: var(--text-lg); line-height: var(--leading-loose);
  color: var(--color-text-muted); margin: 0 0 var(--space-8);
}
.start-proof {
  display: flex; flex-wrap: wrap; gap: var(--space-8);
  margin: 0 0 var(--space-6); padding: var(--space-5) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.start-proof li { display: flex; flex-direction: column; gap: 3px; }
.start-proof strong {
  font-family: var(--font-heading); font-size: var(--text-3xl);
  font-weight: 800; line-height: 1; color: var(--blue-800);
}
.start-proof span { font-size: var(--text-xs); color: var(--color-text-subtle); letter-spacing: 0.04em; }
.start-promise { font-size: var(--text-sm); color: var(--color-text-muted); margin: 0; }
.start-promise em { color: var(--color-text); font-style: normal; font-weight: 600; }

.start-tracks, .start-steps, .start-popular, .start-pillars { padding: var(--space-16) 0; }
.start-steps, .start-pillars {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.start-cta { padding: var(--space-16) 0; }
.start-section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 1.95rem); font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text); margin: 0 0 var(--space-2);
}
.start-section-sub {
  font-size: var(--text-base); color: var(--color-text-muted);
  margin: 0 0 var(--space-8); max-width: 62ch;
}

/* Track selector — the main routing decision on the page */
.track-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(258px, 1fr));
  gap: var(--space-5);
}
.track-card {
  position: relative; display: flex; flex-direction: column;
  padding: var(--space-6);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none; overflow: hidden;
  transition: border-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
}
.track-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--track-accent);
}
.track-card:hover {
  text-decoration: none; transform: translateY(-3px);
  border-color: var(--track-accent); box-shadow: var(--shadow-lg);
}
.track-card-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; margin-bottom: var(--space-4);
  border-radius: var(--radius-md);
  color: var(--track-accent);
  background: color-mix(in srgb, var(--track-accent) 13%, transparent);
}
.track-card-name {
  font-family: var(--font-heading); font-size: var(--text-xl); font-weight: 700;
  color: var(--color-text); margin: 0 0 var(--space-1); line-height: 1.25;
}
.track-card-fields {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em;
  color: var(--track-accent); margin: 0 0 var(--space-3);
}
.track-card-blurb {
  font-size: var(--text-sm); line-height: 1.6;
  color: var(--color-text-muted); margin: 0 0 var(--space-5); flex: 1;
}
.track-card-cta {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--text-sm); font-weight: 600; color: var(--track-accent);
}
.track-card-cta span { transition: transform var(--transition-fast); }
.track-card:hover .track-card-cta span { transform: translateX(3px); }

/* First-steps ladder — concrete next actions, not a reading list */
.step-ladder {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: var(--space-5);
  max-width: 920px; /* keep the line length readable in a full-width container */
}
.step-rung {
  display: grid; grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-5); align-items: start;
  padding: var(--space-6);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.step-rung-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  font-family: var(--font-mono); font-size: 0.86rem; font-weight: 600;
  color: var(--blue-800);
  background: var(--blue-50); border: 1px solid var(--blue-100);
}
.step-rung-title {
  font-family: var(--font-heading); font-size: var(--text-lg); font-weight: 700;
  color: var(--color-text); margin: 0 0 var(--space-2);
}
.step-rung-detail {
  font-size: var(--text-sm); line-height: 1.65;
  color: var(--color-text-muted); margin: 0 0 var(--space-3);
}
.step-rung-link { font-size: var(--text-sm); font-weight: 600; text-decoration: none; }
.step-rung-link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* Pillar chips — the secondary route */
.start-pillar-row { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.start-pillar-chip {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 10px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: var(--text-sm); font-weight: 600;
  color: var(--color-text); text-decoration: none;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}
.start-pillar-chip svg { color: var(--pillar-accent, var(--blue-800)); }
.start-pillar-chip:hover {
  text-decoration: none; transform: translateY(-1px);
  border-color: var(--pillar-accent, var(--color-border-strong));
}
.start-pillar-chip--tools svg { color: var(--gold-deep); }
.start-pillar-chip--tools:hover { border-color: var(--gold); }
.start-pillar-count {
  font-family: var(--font-mono); font-size: 0.72rem;
  color: var(--color-text-subtle);
  padding: 2px 7px; border-radius: 999px; background: var(--color-bg-alt);
}

@media (max-width: 640px) {
  .start-proof { gap: var(--space-6); }
  .step-rung { grid-template-columns: 1fr; gap: var(--space-3); }
}

/* ─── Reduced motion ─── */
@media (prefers-reduced-motion: reduce) {
  .track-card, .pillar-route, .start-pillar-chip, .brand-mark,
  .track-card-cta span { transition: none; }
  .track-card:hover, .pillar-route:hover,
  .start-pillar-chip:hover, .nav-logo:hover .brand-mark { transform: none; }
}

/* ═══════════════════════════════════════════════════════════════
   7. MOBILE — nav drawer, touch targets, overflow safety
   The drawer never opened at all: theme.js looked up `mobile-nav-toggle`
   while the button is `mobile-menu-toggle`. Fixed in theme.js; these rules
   make the drawer usable now that it opens.
   ═══════════════════════════════════════════════════════════════ */

/* Hamburger: a real 44px touch target that becomes a close (X) when open */
.nav-mobile-toggle {
  width: 44px; height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  -webkit-tap-highlight-color: transparent;
}
.site-header .nav-mobile-toggle:hover,
.site-header .nav-mobile-toggle:focus-visible { background: rgba(255,255,255,0.1); }

.hamburger,
.hamburger::before,
.hamburger::after {
  transition: transform var(--transition-fast), background var(--transition-fast);
}
.nav-mobile-toggle.is-open .hamburger { background: transparent; }
.nav-mobile-toggle.is-open .hamburger::before { transform: translateY(6px) rotate(45deg); }
.nav-mobile-toggle.is-open .hamburger::after  { transform: translateY(-6px) rotate(-45deg); }

/* Drawer: scrollable, so a long menu on a short phone stays reachable */
.mobile-nav {
  max-height: calc(100vh - 64px);
  max-height: calc(100dvh - 64px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding-bottom: calc(var(--space-6) + env(safe-area-inset-bottom, 0px));
}
.mobile-nav ul { list-style: none; margin: 0; padding: 0; }
.mobile-nav-link { min-height: 48px; display: flex; align-items: center; }
.mobile-nav li:last-child > .mobile-nav-link { border-bottom: 0; }
.mobile-nav-cta {
  display: flex; width: 100%;
  justify-content: center;
  margin-top: var(--space-5);
  min-height: 48px;
}

/* Lock the page behind the open drawer */
body.nav-open { overflow: hidden; }

@media (min-width: 769px) {
  .mobile-nav { display: none !important; }
  body.nav-open { overflow: auto; }
}

/* ─── Header fits a 320px screen ─── */
@media (max-width: 768px) {
  .nav-container { gap: var(--space-3); padding-inline: var(--space-4); }
  .nav-actions { gap: var(--space-1); }
  .theme-toggle, .nav-search-btn { width: 44px; height: 44px; }
}

/* ─── Component overflow safety at phone widths ─── */
@media (max-width: 768px) {
  /* Long tool URLs and citation keys must not widen the page */
  .tool-meta-value, .card-article-title, .pillar-route-title { overflow-wrap: anywhere; }
  .meta-chip { white-space: normal; }

  .article-header-inner { padding-inline: var(--space-4); }
  .article-layout { padding-inline: var(--space-4); }

  /* Stacked, full-width cards read better than cramped columns */
  .track-grid, .pillar-route-grid { grid-template-columns: 1fr; }
  .start-proof, .hub-stats { gap: var(--space-5); }
  .start-hero { padding: var(--space-12) 0 var(--space-10); }
  .start-tracks, .start-steps, .start-popular, .start-pillars, .start-cta { padding: var(--space-12) 0; }
  .pillar-hero, .hub-hero { padding: var(--space-10) 0 var(--space-8); }

  /* The right sidebar drops below the article on mobile — sticky would
     otherwise pin it mid-scroll. */
  .article-right-sidebar .sidebar-sticky { position: static; }
}

@media (max-width: 480px) {
  .start-proof, .hub-stats { gap: var(--space-4) var(--space-6); }
  .start-proof strong { font-size: var(--text-2xl); }
  .step-rung { padding: var(--space-5); }
  .track-card { padding: var(--space-5); }
  .meta-chips { gap: 6px; }
  .meta-chip { font-size: 0.75rem; padding: 5px 9px; }
}

/* Nothing may cause a horizontal scrollbar on a phone */
html, body { overflow-x: hidden; }

/* ═══════════════════════════════════════════════════════════════
   8. "LOCAL ONLY" RIBBON
   Only rendered in `hugo server` (see partials/unreleased-banner.html).
   Deliberately loud — it must be impossible to mistake an unreleased
   section for a live one.
   ═══════════════════════════════════════════════════════════════ */
.unreleased-banner {
  background: repeating-linear-gradient(
    135deg, #7A2E0E 0 14px, #8A3A14 14px 28px);
  color: #FFF3E6;
  border-bottom: 2px solid #C2410C;
}
.unreleased-banner-inner {
  max-width: var(--width-content);
  margin-inline: auto;
  padding: 12px var(--space-6);
  display: flex; align-items: center; gap: var(--space-4);
}
.unreleased-tag {
  flex-shrink: 0;
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  background: #FFF3E6; color: #7A2E0E;
  padding: 5px 10px; border-radius: 4px;
}
.unreleased-text {
  margin: 0; font-size: 0.85rem; line-height: 1.45;
}
.unreleased-text strong { font-family: var(--font-mono); font-weight: 700; }
.unreleased-hint { display: block; opacity: 0.82; font-size: 0.8rem; }
.unreleased-hint code {
  font-family: var(--font-mono); font-size: 0.95em;
  background: rgba(255,255,255,0.14); padding: 1px 5px; border-radius: 4px;
}
@media (max-width: 640px) {
  .unreleased-banner-inner { flex-direction: column; align-items: flex-start; gap: var(--space-2); padding-inline: var(--space-4); }
}