/*
 * MQ Theme for reveal.js — PSYC4411
 * Macquarie University branded theme
 * 16:9 widescreen (1920×1080 design)
 */

/* ===== Google Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* ===== CSS Variables ===== */
:root {
  --mq-red: #A71930;
  --mq-red-dark: #8B1428;
  --mq-red-light: #D4533B;
  --mq-gold: #C8972C;
  --mq-charcoal: #2D2D2D;
  --mq-dark: #1A1A2E;
  --mq-blue: #4A90D9;
  --mq-green: #5BA55B;
  --mq-orange: #E8873D;
  --mq-purple: #7B68A8;
  --mq-grey: #8C8C8C;
  --mq-light-grey: #F5F5F5;
  --mq-white: #FFFFFF;
  --mq-near-black: #1a1a1a;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ===== Base Slide ===== */
.reveal {
  font-family: var(--font-main);
  font-size: 32px;
  font-weight: 400;
  color: var(--mq-charcoal);
}

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

.reveal .slides section {
  padding: 40px 60px;
  box-sizing: border-box;
}

/* ===== Typography ===== */
.reveal h1 {
  font-size: 2.4em;
  font-weight: 800;
  color: var(--mq-red);
  margin-bottom: 0.3em;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.reveal h2 {
  font-size: 1.8em;
  font-weight: 700;
  color: var(--mq-red);
  margin-bottom: 0.4em;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.reveal h3 {
  font-size: 1.3em;
  font-weight: 600;
  color: var(--mq-charcoal);
  margin-bottom: 0.3em;
  line-height: 1.2;
}

.reveal h4 {
  font-size: 1.0em;
  font-weight: 600;
  color: var(--mq-grey);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5em;
}

.reveal p {
  font-size: 0.95em;
  line-height: 1.55;
  margin-bottom: 0.5em;
  font-weight: 400;
}

.reveal strong {
  font-weight: 700;
  color: var(--mq-charcoal);
}

.reveal em {
  color: var(--mq-grey);
}

/* ===== Lists ===== */
.reveal ul, .reveal ol {
  margin-left: 0.5em;
  margin-bottom: 0.5em;
}

.reveal li {
  font-size: 0.95em;
  line-height: 1.45;
  margin-bottom: 0.3em;
  padding-left: 0.2em;
}

.reveal li li {
  font-size: 0.88em;
  color: var(--mq-grey);
}

.reveal ul {
  list-style: none;
}

.reveal ul > li::before {
  content: "▸";
  color: var(--mq-red);
  font-weight: 700;
  display: inline-block;
  width: 1em;
  margin-left: -1em;
}

/* ===== Title Slide ===== */
.reveal .title-slide {
  text-align: center;
  padding: 80px 60px;
}

.reveal .title-slide h1 {
  color: var(--mq-white);
  font-size: 2.6em;
  margin-bottom: 0.2em;
}

.reveal .title-slide h2 {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.2em;
  font-weight: 400;
  margin-bottom: 1em;
}

.reveal .title-slide .subtitle {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.7em;
  font-weight: 300;
}

.reveal .title-slide .course-code {
  display: inline-block;
  background: var(--mq-red);
  color: white;
  padding: 0.2em 0.8em;
  border-radius: 4px;
  font-size: 0.65em;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.5em;
}

/* ===== Section Divider Slides ===== */
.reveal .section-divider {
  text-align: center;
  padding: 80px 60px;
}

.reveal .section-divider h2 {
  color: var(--mq-white);
  font-size: 2.2em;
  font-weight: 800;
  margin-bottom: 0.3em;
}

.reveal .section-divider p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85em;
  font-weight: 300;
}

.reveal .section-divider .section-icon {
  font-size: 3em;
  margin-bottom: 0.3em;
  opacity: 0.8;
}

/* ===== Discussion / Think About It Slides ===== */
.reveal .think-slide {
  text-align: center;
  padding: 80px 80px;
}

.reveal .think-slide h2 {
  color: var(--mq-gold);
  font-size: 1.4em;
  font-weight: 700;
  margin-bottom: 0.6em;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.reveal .think-slide p {
  color: var(--mq-white);
  font-size: 1.2em;
  line-height: 1.55;
  font-weight: 400;
  max-width: 900px;
  margin: 0 auto;
}

/* ===== Image Slides ===== */
.reveal .image-full {
  text-align: center;
  padding: 30px 40px;
}

.reveal .image-full img {
  max-height: 520px;
  max-width: 95%;
  object-fit: contain;
  border-radius: 8px;
}

.reveal .image-full h2 {
  margin-bottom: 0.2em;
}

/* ===== Two Column Layout ===== */
.reveal .two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.reveal .two-col-wide-left {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 40px;
  align-items: start;
}

.reveal .two-col-wide-right {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 40px;
  align-items: start;
}

.reveal .col img {
  max-width: 100%;
  border-radius: 8px;
}

/* ===== Highlight Boxes ===== */
.reveal .highlight-box {
  background: rgba(167, 25, 48, 0.08);
  border-left: 4px solid var(--mq-red);
  padding: 16px 24px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
}

.reveal .highlight-box p {
  margin-bottom: 0;
  font-size: 0.95em;
}

.reveal .info-box {
  background: rgba(74, 144, 217, 0.08);
  border-left: 4px solid var(--mq-blue);
  padding: 16px 24px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
}

.reveal .key-insight {
  background: rgba(200, 151, 44, 0.1);
  border-left: 4px solid var(--mq-gold);
  padding: 16px 24px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
}

/* ===== Tags / Badges ===== */
.reveal .tag {
  display: inline-block;
  padding: 0.15em 0.6em;
  border-radius: 20px;
  font-size: 0.6em;
  font-weight: 600;
  letter-spacing: 0.03em;
  vertical-align: middle;
}

.tag-red { background: rgba(167, 25, 48, 0.12); color: var(--mq-red); }
.tag-blue { background: rgba(74, 144, 217, 0.12); color: var(--mq-blue); }
.tag-green { background: rgba(91, 165, 91, 0.12); color: var(--mq-green); }
.tag-orange { background: rgba(232, 135, 61, 0.12); color: var(--mq-orange); }
.tag-purple { background: rgba(123, 104, 168, 0.12); color: var(--mq-purple); }

/* ===== Code Blocks ===== */
.reveal code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--mq-light-grey);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  color: var(--mq-red-dark);
}

.reveal pre {
  background: var(--mq-near-black);
  border-radius: 8px;
  padding: 20px;
  font-size: 0.55em;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.reveal pre code {
  background: none;
  color: #e0e0e0;
  padding: 0;
}

/* ===== Prompt Comparison ===== */
.reveal .prompt-bad {
  background: rgba(220, 53, 69, 0.08);
  border: 2px solid rgba(220, 53, 69, 0.3);
  border-radius: 8px;
  padding: 18px 24px;
  margin: 8px 0;
  font-family: var(--font-mono);
  font-size: 0.8em;
}

.reveal .prompt-good {
  background: rgba(91, 165, 91, 0.08);
  border: 2px solid rgba(91, 165, 91, 0.3);
  border-radius: 8px;
  padding: 18px 24px;
  margin: 8px 0;
  font-family: var(--font-mono);
  font-size: 0.8em;
}

/* ===== End Slide ===== */
.reveal .end-slide {
  text-align: center;
  padding: 80px 60px;
}

.reveal .end-slide h1 {
  color: var(--mq-white);
  font-size: 2.2em;
}

.reveal .end-slide p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8em;
}

/* ===== Fragment Tweaks ===== */
.reveal .fragment.fade-in-then-semi-out.visible:not(.current-fragment) {
  opacity: 0.4;
}

/* ===== Misc ===== */
.reveal .small {
  font-size: 0.75em;
  color: var(--mq-grey);
}

.reveal .attribution {
  font-size: 0.6em;
  color: var(--mq-grey);
  text-align: right;
  margin-top: 1em;
}

.reveal .spacer {
  height: 12px;
}

.reveal .spacer-lg {
  height: 24px;
}

/* Icon styling for Phosphor icons */
.reveal .ph {
  vertical-align: -0.15em;
  margin-right: 0.15em;
}

/* ===== Hide default progress bar & slide number (replaced by nav bar) ===== */
.reveal .progress {
  display: none;
}

.reveal .slide-number {
  display: none;
}

/* ===== Edge Controls ===== */
.reveal .controls {
  color: var(--mq-red);
}

/* ===== Custom Slide Navigation Bar ===== */
.slide-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  z-index: 50;
  display: flex;
  align-items: stretch;
  transition: height 0.3s ease, box-shadow 0.3s ease;
  background: rgba(45, 45, 45, 0.12);
  cursor: pointer;
}

.slide-nav:hover {
  height: 40px;
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.25);
  background: rgba(26, 26, 46, 0.92);
}

.slide-nav-pill {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: background 0.2s, color 0.2s;
  border: none;
  outline: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 500;
  color: transparent;
  background: transparent;
  cursor: pointer;
  user-select: none;
}

/* On hover of bar, show pill numbers */
.slide-nav:hover .slide-nav-pill {
  color: rgba(255, 255, 255, 0.45);
}

.slide-nav:hover .slide-nav-pill:hover {
  color: var(--mq-white);
  background: rgba(255, 255, 255, 0.12);
}

/* Active slide pill */
.slide-nav-pill.active {
  background: var(--mq-red);
}

.slide-nav:hover .slide-nav-pill.active {
  color: var(--mq-white);
  background: var(--mq-red);
  font-weight: 700;
}

/* Progress fill — visible even when bar is collapsed */
.slide-nav-pill.visited {
  background: rgba(167, 25, 48, 0.25);
}

.slide-nav:hover .slide-nav-pill.visited {
  background: rgba(167, 25, 48, 0.15);
}

/* Tooltip on hover */
.slide-nav-pill .nav-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--mq-charcoal);
  color: var(--mq-white);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
  margin-bottom: 4px;
}

.slide-nav-pill:hover .nav-tooltip {
  opacity: 1;
}

/* ===== Scrollbar ===== */
.reveal ::-webkit-scrollbar {
  width: 6px;
}

.reveal ::-webkit-scrollbar-track {
  background: transparent;
}

.reveal ::-webkit-scrollbar-thumb {
  background: var(--mq-grey);
  border-radius: 3px;
}

/* ===== Links ===== */
.reveal a {
  color: var(--mq-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(74, 144, 217, 0.3);
  transition: border-color 0.2s;
}

.reveal a:hover {
  border-bottom-color: var(--mq-blue);
}

.reveal .section-divider a,
.reveal .title-slide a,
.reveal .think-slide a,
.reveal .end-slide a {
  color: rgba(255, 255, 255, 0.8);
  border-bottom-color: rgba(255, 255, 255, 0.3);
}

/* ===== HTML Diagrams ===== */

/* --- AI Hierarchy (nested boxes) --- */
.hierarchy-diagram {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px 0;
}

.hierarchy-layer {
  border-radius: 16px;
  padding: 14px 20px;
  text-align: center;
  transition: opacity 0.5s;
}

.hierarchy-layer .layer-label {
  font-weight: 700;
  font-size: 0.85em;
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.hierarchy-layer .layer-examples {
  font-size: 0.65em;
  opacity: 0.7;
  margin-bottom: 8px;
}

/* --- Flow Diagrams (horizontal step flows) --- */
.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: nowrap;
}

.flow-step {
  padding: 18px 26px;
  border-radius: 12px;
  text-align: center;
  font-weight: 700;
  font-size: 0.85em;
  min-width: 140px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.flow-step .step-subtitle {
  font-weight: 400;
  font-size: 0.8em;
  margin-top: 4px;
  opacity: 0.8;
}

.flow-arrow {
  font-size: 1.8em;
  color: var(--mq-grey);
  margin: 0 8px;
  font-weight: 300;
}

.flow-return {
  display: block;
  text-align: center;
  font-size: 0.65em;
  color: var(--mq-grey);
  margin-top: 8px;
}

/* --- Cycle-back arrow (curved arrow beneath flow diagram) --- */
.flow-cycle {
  position: relative;
  margin: 0 auto;
  height: 36px;
}

.flow-cycle svg {
  display: block;
  margin: 0 auto;
}

.flow-cycle-label {
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6em;
  color: var(--mq-grey);
  white-space: nowrap;
  font-weight: 500;
}

/* Compact variant for nested diagram */
.flow-cycle.compact {
  height: 24px;
}

.flow-cycle.compact .flow-cycle-label {
  font-size: 0.45em;
}

/* --- Comparison Diagrams --- */
.compare-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: start;
}

.compare-side {
  text-align: center;
}

.compare-side h3 {
  margin-bottom: 16px;
}

.compare-box {
  border-radius: 12px;
  padding: 16px 22px;
  margin: 8px 0;
  font-size: 0.85em;
  font-weight: 600;
  text-align: center;
}

.compare-arrow {
  font-size: 1.6em;
  color: var(--mq-grey);
  text-align: center;
  padding: 4px 0;
}

.compare-vs {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4em;
  font-weight: 800;
  color: var(--mq-grey);
  opacity: 0.4;
}

/* --- Venn Diagram --- */
.venn-container {
  position: relative;
  height: 800px;
  margin: 0 auto;
  max-width: 1300px;
}

.venn-circle {
  position: absolute;
  width: 740px;
  height: 740px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 70px 90px;
  box-sizing: border-box;
}

.venn-circle h3 {
  font-size: 1.4em;
  margin-bottom: 8px;
}

.venn-circle p {
  font-size: 1.0em;
  line-height: 1.4;
}

.venn-overlap {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 2;
  font-weight: 700;
  font-size: 1.2em;
  width: 260px;
}

/* --- Tool Cards --- */
.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.tool-card {
  background: var(--mq-light-grey);
  border-radius: 12px;
  padding: 16px 20px;
  border-left: 4px solid var(--mq-blue);
  transition: transform 0.2s;
}

.tool-card h4 {
  font-size: 0.9em;
  color: var(--mq-charcoal);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 4px;
}

.tool-card p {
  font-size: 0.75em;
  margin-bottom: 0;
  color: var(--mq-grey);
}

.tool-card a {
  font-size: 0.75em;
}

/* --- Three Column Layout --- */
.reveal .three-col {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}

/* Ensure content inside stretched columns stays top-aligned */
.reveal .three-col > .col > .highlight-box,
.reveal .three-col > .col > .info-box,
.reveal .three-col > .col > div[style] {
  height: 100%;
  box-sizing: border-box;
}

/* --- HTML Timeline --- */
.timeline {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 0 10px;
  margin: 8px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 16px;
  left: 20px;
  right: 20px;
  height: 4px;
  background: linear-gradient(90deg, var(--mq-grey) 0%, var(--mq-red) 100%);
  border-radius: 2px;
  z-index: 0;
}

.timeline-event {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 1;
  flex: 1;
  min-width: 0;
}

.timeline-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  margin-bottom: 8px;
  flex-shrink: 0;
}

.timeline-year {
  font-weight: 700;
  font-size: 0.7em;
  color: var(--mq-charcoal);
  margin-bottom: 2px;
}

.timeline-text {
  font-size: 0.6em;
  color: var(--mq-grey);
  text-align: center;
  line-height: 1.3;
  max-width: 160px;
}

/* --- Coloured Bullet Variants --- */
.reveal ul > li.bullet-blue::before { color: var(--mq-blue); }
.reveal ul > li.bullet-orange::before { color: var(--mq-orange); }
.reveal ul > li.bullet-grey::before { color: var(--mq-grey); }
.reveal ul > li.bullet-green::before { color: var(--mq-green); }
.reveal ul > li.bullet-red::before { color: var(--mq-red); }
.reveal ul > li.bullet-purple::before { color: var(--mq-purple); }

/* --- Timeline Slide Bullet Spacing --- */
.reveal ul.timeline-bullets > li {
  margin-bottom: 0.65em;
}

/* ===== Back to Repo Link ===== */
.back-to-repo {
  position: fixed;
  top: 16px;
  left: 24px;
  z-index: 50;
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 600;
  color: var(--mq-grey);
  background: rgba(255, 255, 255, 0.85);
  padding: 4px 14px;
  border-radius: 6px;
  letter-spacing: 0.02em;
  backdrop-filter: blur(4px);
  text-decoration: none;
  transition: opacity 0.3s, color 0.3s, background 0.3s;
  opacity: 0.7;
}
.back-to-repo:hover {
  opacity: 1;
  color: var(--mq-red);
  text-decoration: none;
}

/* ===== Live Clock ===== */
.live-clock {
  position: fixed;
  top: 16px;
  right: 24px;
  z-index: 50;
  font-family: var(--font-main);
  font-size: 18px;
  font-weight: 600;
  color: var(--mq-grey);
  background: rgba(255, 255, 255, 0.85);
  padding: 4px 14px;
  border-radius: 6px;
  letter-spacing: 0.02em;
  backdrop-filter: blur(4px);
  pointer-events: none;
  user-select: none;
  transition: opacity 0.3s;
}

/* Invert clock on dark slides */
.reveal .section-divider ~ .live-clock,
.reveal .title-slide ~ .live-clock,
.reveal .think-slide ~ .live-clock,
.reveal .end-slide ~ .live-clock {
  color: rgba(255, 255, 255, 0.5);
  background: rgba(0, 0, 0, 0.3);
}

/* ===== Minimum Text Size Convention =====
 * No text should render below ~19px (0.6em at 32px base).
 * Exceptions: bold uppercase labels in nested diagrams (0.65em)
 * and nav bar UI elements. Always test readability from 3m away.
 */

/* ===== Print / PDF ===== */
@media print {
  .reveal .slides section {
    page-break-after: always;
  }
}