/* =================================================================
   Presentation stylesheet — Reveal.js overrides
   Harvard / Nobel-tier scholarly register · pure typographic
   Centered slides · generous whitespace · no decoration · no emoji
   ================================================================= */

:root {
  --paper:       #fbfaf6;
  --paper-soft:  #f5f3ec;
  --paper-warm:  #f8f5ec;
  --ink:         #14110f;
  --ink-soft:    #3a3633;
  --ink-mute:    #7a736d;
  --ink-faint:   #a8a098;
  --rule:        #ddd5c6;
  --rule-soft:   #eae3d3;
  --accent:      #a98439;
  --accent-soft: #c7a974;
  --accent-deep: #8a6a2c;

  --serif: "Cormorant Garamond", "EB Garamond", "Garamond", "Cambria",
           "Georgia", "Times New Roman", serif;
  --sans:  "Inter", "Helvetica Neue", "Helvetica", "Arial",
           system-ui, -apple-system, sans-serif;
  --mono:  "JetBrains Mono", "SF Mono", "Menlo", "Consolas", monospace;
}

/* ===== Base canvas ===== */

html, body { background: var(--paper); }

.reveal-viewport,
.reveal {
  background: var(--paper) !important;
}

.reveal {
  font-family: var(--serif);
  color: var(--ink);
  font-weight: 400;
  font-feature-settings: "kern" 1, "liga" 1, "onum" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Slide canvas — centered ===== */

.reveal .slides {
  text-align: center;
}

.reveal .slides > section,
.reveal .slides > section > section {
  padding: 3.5rem 5.5rem !important;
  line-height: 1.55;
  height: 100%;
}

/* ===== Typography ===== */

.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4 {
  font-family: var(--serif);
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.014em;
  text-transform: none;
  margin: 0 0 0.8em;
  line-height: 1.14;
  text-shadow: none;
  text-align: center;
}

.reveal h1 {
  font-size: 2.45em;
  letter-spacing: -0.025em;
}

.reveal h2 {
  font-size: 1.8em;
  margin-top: 0;
  padding-bottom: 0;
  border-bottom: none;
  margin-bottom: 0.4em;
}

/* Subtle gold rule under each section title */
.reveal h2::after {
  content: "";
  display: block;
  width: 2.8rem;
  height: 1px;
  background: var(--accent);
  margin: 0.55em auto 0.7em;
}

.reveal h3 {
  font-size: 1.25em;
  font-style: italic;
  color: var(--ink-soft);
  margin-top: 1em;
}

.reveal p,
.reveal li {
  font-family: var(--serif);
  font-size: 1.05em;
  line-height: 1.6;
  color: var(--ink);
  max-width: 36em;
  margin-left: auto;
  margin-right: auto;
}

.reveal strong { font-weight: 600; color: var(--ink); }
.reveal em     { font-style: italic; }

.reveal a {
  color: var(--accent-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}

.reveal a:hover { color: var(--ink); border-bottom-color: var(--accent); }

.reveal ul, .reveal ol {
  margin: 0.8em auto;
  padding-left: 1.4em;
  text-align: left;
  max-width: 38em;
}

.reveal li {
  margin-bottom: 0.55em;
  max-width: none;
  text-align: left;
}

.reveal li::marker { color: var(--ink-mute); }

.reveal blockquote {
  background: transparent;
  border: none;
  border-left: 2px solid var(--accent);
  padding: 0.5em 1.4em;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.25em;
  color: var(--ink);
  line-height: 1.45;
  margin: 1.2em auto;
  box-shadow: none;
  text-align: left;
  max-width: 42em;
}

/* ===== Title slide ===== */

.reveal .title-slide {
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100%;
}

.reveal .title-slide h1 {
  font-size: 2.6em;
  margin-top: 0.5em;
  letter-spacing: -0.025em;
}

.reveal .eyebrow {
  display: block;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.62em;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 1.2em;
  text-align: center;
}

.reveal .title-rule {
  width: 3.5rem;
  height: 1px;
  background: var(--accent);
  margin: 1.6em auto;
}

.reveal .byline {
  font-family: var(--sans);
  font-size: 0.64em;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  line-height: 1.7;
  text-align: center;
}

.reveal .byline-meta {
  display: block;
  margin-top: 0.5em;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1em;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink-mute);
}

/* ===== Stat row — used on impact slides ===== */

.reveal .stat-row {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 1.8em auto 1.2em;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 1.5em 0;
  max-width: 44em;
}

.reveal .stat-row .stat {
  text-align: center;
  flex: 1;
}

.reveal .stat-row .stat-num {
  display: block;
  font-family: var(--serif);
  font-size: 2.6em;
  font-weight: 500;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.02em;
  margin-bottom: 0.25em;
}

.reveal .stat-row .stat-label {
  display: block;
  font-family: var(--sans);
  font-size: 0.46em;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  line-height: 1.4;
}

/* ===== Tables ===== */

.reveal table {
  font-family: var(--sans);
  font-size: 0.74em;
  width: auto;
  margin: 1em auto;
  border-collapse: collapse;
  min-width: 60%;
  max-width: 92%;
}

.reveal table th,
.reveal table td {
  padding: 0.6em 1em;
  text-align: left;
  vertical-align: top;
  border: none;
  border-bottom: 1px solid var(--rule-soft);
}

.reveal table thead th {
  font-weight: 600;
  font-size: 0.82em;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--ink-soft);
  border-bottom: 1.5px solid var(--ink);
  padding-bottom: 0.8em;
}

.reveal table tbody tr:hover { background: var(--paper-warm); }

/* Right-align numeric columns */
.reveal table td:nth-child(n+2),
.reveal table th:nth-child(n+2) {
  text-align: right;
}

.reveal table td:first-child {
  font-family: var(--serif);
  font-size: 1.05em;
  color: var(--ink);
}

/* ===== Code ===== */

.reveal code,
.reveal pre {
  font-family: var(--mono);
}

.reveal code {
  background: var(--paper-soft);
  color: var(--ink-soft);
  padding: 0.08em 0.32em;
  border-radius: 2px;
  font-size: 0.82em;
}

.reveal pre {
  background: var(--paper-soft);
  border: 1px solid var(--rule);
  padding: 1em 1.3em;
  font-size: 0.7em;
  line-height: 1.55;
  box-shadow: none;
  margin: 1em auto;
  max-width: 42em;
  text-align: left;
}

.reveal pre code { background: transparent; padding: 0; }

/* ===== Figures ===== */

.reveal figure {
  margin: 0.6em auto;
  text-align: center;
}

.reveal figure img,
.reveal .slide img {
  max-width: 78%;
  max-height: 60vh;
  border: 1px solid var(--rule);
  background: var(--paper);
  filter: grayscale(4%) contrast(1.02);
  margin: 0 auto;
}

.reveal figcaption {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.62em;
  color: var(--ink-mute);
  margin-top: 0.6em;
  line-height: 1.45;
  max-width: 36em;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Progress, slide number, controls ===== */

.reveal .progress {
  height: 2px !important;
  background: var(--rule-soft);
  color: var(--accent) !important;
}

.reveal .progress span {
  background: var(--accent) !important;
}

.reveal .slide-number {
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  background: transparent;
  bottom: 1.6rem;
  right: 2.2rem;
}

.reveal .slide-number a { color: var(--ink-mute); border-bottom: none; }

.reveal .controls { display: none !important; }

/* ===== Callout ===== */

.reveal .callout {
  background: var(--paper-soft);
  border-left: 2px solid var(--accent);
  border-radius: 0;
  padding: 1.1em 1.4em;
  font-size: 0.95em;
  margin: 1.2em auto;
  text-align: left;
  max-width: 42em;
}

.reveal .callout-title {
  font-family: var(--sans);
  font-size: 0.62em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 0.5em;
}

.reveal .callout p { max-width: none; }

/* ===== Footer ===== */

.reveal .footer {
  font-family: var(--sans);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  bottom: 1.6rem;
  left: 2.2rem;
  text-align: left;
}

/* ===== Custom deck controls — Exit · Download PDF · Download PPTX ===== */

.deck-controls {
  position: fixed;
  top: 1.4rem;
  right: 2rem;
  z-index: 50;
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-family: var(--sans);
}

.deck-controls a {
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0.55rem 1rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease;
  text-decoration: none;
}

.deck-controls a:hover {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}

.deck-controls a.deck-exit {
  color: var(--ink);
  border-color: var(--ink-soft);
}

.deck-controls a.deck-exit:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper);
}

@media print {
  .deck-controls { display: none !important; }
}

/* ===== Print-PDF tweaks ===== */

.reveal.pdf-export .progress,
.reveal.pdf-export .slide-number {
  display: none !important;
}

/* ===== Acknowledgement / closing slide ===== */

.reveal .closing {
  text-align: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.15em;
  color: var(--ink-soft);
  max-width: 36em;
  margin: 1.5em auto;
  line-height: 1.55;
}