/* styles.css — site-wide theme overrides for the Cosmo/Darkly Bootstrap base.
 * Scope: regular HTML pages (paper chapters, notebook, replication).
 * Presentation slides have their own presentation.css. */

/* ─── Shared palette (mirrors presentation.css for visual continuity) ─── */
:root {
  --max-content-width: 70ch;
  --bg-paper:    #fbf9f4;
  --ink:         #1a1f2e;
  --ink-soft:    #4a5066;
  --ink-mute:    #8c8e98;
  --serif:       "EB Garamond", "Charter", "Georgia", serif;
  --sans:        "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --mono:        "JetBrains Mono", "SF Mono", "Menlo", monospace;
  --accent:      #7a1f2b;
  --accent-soft: rgba(122, 31, 43, 0.08);
  --accent-gold: #a87a3d;
  --accent-glow: rgba(168, 122, 61, 0.18);
  --rule:        #d8d2c4;
  --rule-soft:   #ece6d8;
  --highlight:   #fdf3d8;
}

/* Lazy-load Google Fonts on the HTML pages too, so the serif citations match. */
@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;1,400;1,500&family=Inter:wght@300;400;500;600&display=swap');

main.content {
  max-width: var(--max-content-width);
}

/* Tighter line-spacing on tables. */
table {
  font-size: 0.94rem;
}

/* Slightly larger inline code so it visually separates from prose. */
p code, li code {
  font-size: 0.92em;
  padding: 1px 4px;
  border-radius: 3px;
}

/* Pull-quotes / callouts read as document chrome, not as paragraphs. */
.callout {
  border-radius: 6px;
}

/* Hide the dollar-sign prompt the default bootstrap monospace block adds
   in front of bash code — it confuses copy-paste. */
.sourceCode.bash::before {
  content: none !important;
}

/* ─── In-text citation refinement ────────────────────────────────────── */

/* Quarto renders `[@key]` as `<a href="#ref-key" class="citation">…</a>`.
 * Subtle accent + hover, so citations stand apart from regular links. */
a.citation {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted rgba(122, 31, 43, 0.4);
  white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease;
  padding: 0 1px;
  border-radius: 2px;
}

a.citation:hover {
  background: var(--accent-soft);
  border-bottom-color: var(--accent);
}

/* Quarto's hover-tooltip for citations (`citations-hover: true` in _quarto.yml) */
.csl-bib-body .hanging-indent,
.csl-bib-body div {
  break-inside: avoid;
}

/* ─── References section — chapter-end bibliography ──────────────────── */

#refs,
.references,
div.csl-bib-body {
  font-family: var(--serif);
  font-size: 0.92em;
  line-height: 1.55;
  margin-top: 0.6em;
  border-top: 1px solid var(--rule);
  padding-top: 1.2em;
}

#refs .csl-entry,
.references .csl-entry,
div.csl-bib-body > div {
  padding-left: 2em;
  text-indent: -2em;
  margin: 0 0 0.7em 0;
  color: #1a1f2e;
  scroll-margin-top: 80px;       /* leaves room for sticky navbars when jumping */
  transition: background 0.4s ease, border-left-color 0.4s ease;
  border-left: 3px solid transparent;
  padding-top: 0.15em;
  padding-bottom: 0.15em;
}

#refs .csl-entry a,
.references .csl-entry a {
  color: var(--accent);
  word-break: break-word;
  border-bottom: none;
}

#refs .csl-entry a:hover,
.references .csl-entry a:hover {
  text-decoration: underline;
}

/* ─── Click-to-highlight effect (`:target`) ──────────────────────────── */

/* When a citation link is clicked, the browser jumps to #ref-<key> on
 * the same page. The :target pseudo-class lets us flash the entry. */
#refs .csl-entry:target,
.references .csl-entry:target,
div.csl-bib-body > div:target {
  background: var(--accent-glow);
  border-left-color: var(--accent-gold);
  padding-left: calc(2em + 0.7em);
  margin-left: -0.7em;
  animation: ref-pulse 1.6s ease-out;
}

@keyframes ref-pulse {
  0%   { background: var(--accent-glow); }
  60%  { background: var(--accent-glow); }
  100% { background: transparent; }
}

/* ─── References heading — quiet academic style ──────────────────────── */

h2#references,
h2[id="references"],
section[id="references"] > h2,
h2:has(+ #refs),
h2:has(+ .references) {
  font-family: var(--serif);
  font-weight: 500;
  font-style: italic;
  font-size: 1.5rem;
  color: #1a1f2e;
  letter-spacing: -0.01em;
  margin-top: 2.4em;
  margin-bottom: 0.8em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--rule);
}

/* ─── Hover-popup styling — Quarto's citation tooltip ────────────────── */

.quarto-citation-popup,
.tippy-box {
  font-family: var(--serif) !important;
  font-size: 0.9rem !important;
  line-height: 1.5 !important;
  background: #1a1f2e !important;
  color: #fbf9f4 !important;
  border-radius: 4px !important;
  max-width: 420px !important;
}

.tippy-box[data-theme~='quarto'] {
  background-color: #1a1f2e;
  color: #fbf9f4;
}

/* ═══════════════════════════════════════════════════════════════════════
 * Navbar — refined academic / Nobel-laureate aesthetic.
 * Type-driven, restrained, paper-toned. Strong but quiet hierarchy.
 *
 * Structure: layout rules apply in both modes. Color rules are split
 * into LIGHT and DARK sections, each setting Bootstrap's own
 * `--bs-navbar-*` CSS variables at the navbar root so descendants
 * inherit correct contrast regardless of which `.navbar-light` or
 * `.navbar-dark` utility class Bootstrap may apply.
 * ═══════════════════════════════════════════════════════════════════════ */

/* ─── Layout (theme-agnostic) ──────────────────────────────────────── */
.navbar {
  border-bottom: 1px solid var(--rule);
  box-shadow: none !important;
  padding: 1.1em 0 !important;
  min-height: 0;
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.navbar.fixed-top {
  backdrop-filter: blur(10px) saturate(120%);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
}

.navbar > .container,
.navbar > .container-fluid {
  align-items: baseline;
  max-width: 1240px;
}

/* ─── LIGHT MODE colors ────────────────────────────────────────────── */
.navbar,
.navbar.navbar-light,
html:not([data-bs-theme="dark"]) .navbar,
[data-bs-theme="light"] .navbar {
  background: rgba(251, 249, 244, 0.96) !important;
  background-color: rgba(251, 249, 244, 0.96) !important;
  border-bottom-color: var(--rule);

  --bs-navbar-color: #1a1f2e;            /* full ink — strongly visible */
  --bs-navbar-hover-color: #7a1f2b;      /* oxblood */
  --bs-navbar-active-color: #1a1f2e;
  --bs-navbar-brand-color: #1a1f2e;
  --bs-navbar-brand-hover-color: #7a1f2b;
  --bs-navbar-disabled-color: #8c8e98;
  --bs-navbar-toggler-border-color: var(--rule);
}

/* ─── DARK MODE colors ─────────────────────────────────────────────── */
[data-bs-theme="dark"] .navbar,
[data-bs-theme="dark"] .navbar.navbar-dark,
[data-bs-theme="dark"] .navbar.navbar-light {
  background: rgba(14, 34, 51, 0.96) !important;
  background-color: rgba(14, 34, 51, 0.96) !important;
  border-bottom-color: rgba(255, 255, 255, 0.1);

  --bs-navbar-color: #fbf9f4;            /* cream — strongly visible on navy */
  --bs-navbar-hover-color: #a87a3d;      /* gold accent */
  --bs-navbar-active-color: #ffffff;
  --bs-navbar-brand-color: #fbf9f4;
  --bs-navbar-brand-hover-color: #a87a3d;
  --bs-navbar-disabled-color: rgba(251, 249, 244, 0.45);
  --bs-navbar-toggler-border-color: rgba(255, 255, 255, 0.15);
}

/* ─── Brand: author / project name in italic serif ─────────────────── */
.navbar-brand,
.navbar-title {
  font-family: var(--serif) !important;
  font-style: italic !important;
  font-size: 1.32rem !important;
  font-weight: 500 !important;
  letter-spacing: -0.012em;
  color: var(--bs-navbar-brand-color) !important;
  line-height: 1;
  padding: 0 !important;
  margin: 0 1.4em 0 0 !important;
  border-bottom: none !important;
  transition: color 0.18s ease;
}

.navbar-brand:hover,
.navbar-title:hover {
  color: var(--bs-navbar-brand-hover-color) !important;
}

/* Hide the navbar logo icon if any — text-only is cleaner */
.navbar-brand .navbar-logo {
  display: none;
}

/* ─── Nav links: small caps with letter-spacing ────────────────────── */
.navbar-nav {
  align-items: center;
  gap: 0;
}

.navbar-nav .nav-item {
  margin: 0;
}

.navbar-nav .nav-link {
  font-family: var(--sans) !important;
  font-size: 0.78rem !important;
  font-weight: 600 !important;
  letter-spacing: 0.13em !important;
  text-transform: uppercase;
  color: var(--bs-navbar-color) !important;
  margin: 0 0.15em;
  padding: 0.45em 0.7em !important;
  position: relative;
  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  transition: color 0.18s ease;
  opacity: 1 !important;
}

.navbar-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 0.7em;
  right: 0.7em;
  bottom: 0.15em;
  height: 1px;
  background: var(--bs-navbar-hover-color);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.22s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
  color: var(--bs-navbar-hover-color) !important;
  background: transparent !important;
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link:focus::after,
.navbar-nav .nav-link.active::after {
  transform: scaleX(1);
}

.navbar-nav .nav-link.active {
  color: var(--bs-navbar-active-color) !important;
}

.navbar-nav .nav-link.active::after {
  background: var(--accent-gold);
  transform: scaleX(1);
}

[data-bs-theme="dark"] .navbar-nav .nav-link.active::after {
  background: var(--accent-gold);
}

/* ─── Right-side icons (GitHub, dark-mode toggle, search) ──────────── */
.quarto-navbar-tools,
.navbar .navbar-nav.ms-auto {
  margin-left: auto;
}

.quarto-navbar-tools .quarto-navigation-tool {
  color: var(--bs-navbar-color) !important;
  font-size: 0.95rem !important;
  padding: 0.3em 0.5em !important;
  transition: color 0.18s ease;
  opacity: 1 !important;
}

.quarto-navbar-tools .quarto-navigation-tool:hover {
  color: var(--bs-navbar-hover-color) !important;
  background: transparent !important;
}

/* ─── Search input — quieter, more typographic ─────────────────────── */
.navbar .aa-DetachedSearchButton,
.navbar .aa-Input {
  border-color: var(--rule);
  background: transparent;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--bs-navbar-color);
}

[data-bs-theme="dark"] .navbar .aa-DetachedSearchButton {
  border-color: rgba(255, 255, 255, 0.15);
}

/* ─── Mobile collapse: keep type elegant on smaller screens ────────── */
.navbar-toggler {
  border-color: var(--bs-navbar-toggler-border-color);
  color: var(--bs-navbar-color);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 2px var(--accent-soft);
}

/* ─── Page footer — quiet, typographic ─── */
.nav-footer,
.page-footer {
  background: var(--bg-paper) !important;
  border-top: 1px solid var(--rule) !important;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.82rem;
  color: var(--ink-mute);
  padding: 1.2em 0 !important;
  margin-top: 4em;
}

.nav-footer a,
.page-footer a {
  color: var(--ink-soft);
  border-bottom: none;
}

.nav-footer a:hover,
.page-footer a:hover {
  color: var(--accent);
}