/* ============================================================
   HARMONIC – Companion Page
   style.css
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600;700&display=swap');

:root {
  --font-sans: 'Geist', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Geist Mono', 'Courier New', monospace;

  --bg:          #f9fbff;
  --bg-alt:      #f2f6ff;
  --text:        #0e1929;
  --text-muted:  #4f6275;
  --accent:      #1d4ed8;
  --accent-light:#dce8fd;
  --border:      #c4d2e8;
  --nav-bg:      rgba(255,255,255,0.95);

  --radius:  6px;
  --section-gap: 1.25rem;

  --color-bg-secondary:   var(--bg-alt);
  --color-bg-card:        var(--bg);
  --color-bg-tertiary:    #d8e5f5;
  --color-border:         var(--border);
  --color-accent:         var(--accent);
  --color-accent-hover:   #1e40af;
  --color-text-primary:   var(--text);
  --color-text-secondary: var(--text-muted);
  --color-text-tertiary:  #9ca3af;
  --color-primary:        var(--text);
  --space-xs:  0.15rem;
  --space-sm:  0.3rem;
  --space-md:  0.5rem;
  --space-lg:  0.75rem;
  --space-xl:  1rem;
  --space-3xl: 1.5rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-full: 999px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --transition-base: 0.2s ease;
  --transition-fast: 0.15s ease;

  --sidebar-width: 260px;
  --topbar-height: 3rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: #ffffff;
  color: var(--text);
  line-height: 1.55;
  text-align: justify;
}

.page-wrapper {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  max-width: 1420px;
  margin-inline: auto;
  padding-inline-start: 4rem;
  padding-inline-end: 1.5rem;
}
.page-wrapper > main { flex: 1; min-width: 0; }

img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { text-align: left; }
h1 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); font-weight: 700; line-height: 1.2; }
h2 { font-size: clamp(1.3rem, 2.5vw, 1.9rem); font-weight: 600; line-height: 1.3; }
h3 { font-size: 1.15rem; font-weight: 600; }
h4 { font-size: 1rem;    font-weight: 600; }

p { margin-bottom: 0.5rem; }
p:last-child { margin-bottom: 0; }

/* Elements that should not be justified */
nav, button, .insight-nav, .study-tab-nav, .cap-table,
table, .hero-authors, .hero-conference, .hero-abstract-title,
.hero-title, .sidebar, .topbar, .results-table,
.gloss-def, .chart-card, .subsection-title {
  text-align: left;
}
.study-tab-nav, .insight-nav, .arch-tab-nav { text-align: center; }

code, .mono {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-alt);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.container {
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

section { padding-block: var(--section-gap); }
section:nth-of-type(even) { background: #f7f9fc; }

.section-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
  text-align: left;
}

.section-title {
  margin-bottom: 0.25rem;
  text-align: left;
}

.section-divider {
  width: 2.5rem;
  height: 2px;
  background: var(--border);
  margin-bottom: 0.75rem;
}

/* ---- Mobile topbar ---- */
#topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-height);
  z-index: 300;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  align-items: center;
  padding-inline: 1rem;
  gap: 0.75rem;
}
.topbar-toggle {
  display: flex; flex-direction: column; gap: 4px;
  background: none; border: none; cursor: pointer; padding: 4px; flex-shrink: 0;
}
.topbar-toggle span {
  display: block; width: 20px; height: 2px;
  background: var(--text); border-radius: 2px;
}
.topbar-brand { font-size: 0.9rem; font-weight: 700; color: var(--text); letter-spacing: 0.05em; }
.topbar-crumb { font-size: 0.8rem; color: var(--text-muted); }
.topbar-crumb::before { content: '/'; margin-inline: 0.4rem; }

/* ---- Sidebar ---- */
#sidebar {
  position: sticky;
  top: calc(50vh - 160px);
  width: var(--sidebar-width);
  flex-shrink: 0;
  max-height: calc(100vh - 3rem);
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 2px 20px rgba(30,60,120,0.09);
  overflow-y: auto;
  overflow-x: hidden;
  margin-block: 1.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.sidebar-leia-link {
  display: block;
  padding: 0.65rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: color 0.15s, background 0.15s;
}
.sidebar-leia-link i {
  margin-right: 0.35rem;
  font-size: 0.75rem;
}
.sidebar-leia-link:hover {
  color: var(--accent);
  background: var(--bg-alt);
  text-decoration: none;
}

.sidebar-nav { padding: 0.75rem 0; flex: 1; }

.sidebar-page-link {
  display: block;
  padding: 0.6rem 1.25rem 0.6rem 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  line-height: 1.4;
  text-align: right;
  border-right: 3px solid transparent;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.sidebar-page-link:hover {
  color: var(--accent);
  background: var(--bg-alt);
  text-decoration: none;
}
.sidebar-page-link.active {
  color: var(--accent);
  background: var(--accent-light);
  border-right-color: var(--accent);
  font-weight: 600;
}
#sidebar-backdrop {
  display: none; position: fixed; inset: 0; z-index: 190;
  background: rgba(0,0,0,0.35);
}

/* ---- Hero ---- */
#hero {
  padding-top: 1rem;
  padding-bottom: 1rem;
  background: linear-gradient(160deg, #eff4fc 0%, var(--bg) 70%);
}

.hero-title {
  max-width: 780px;
  margin-bottom: 0.6rem;
  line-height: 1.2;
}
.hero-title-main {
  display: block;
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.hero-title-sub {
  display: block;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0;
  line-height: 1.55;
}
@media (max-width: 640px) {
  .hero-title-main { font-size: 1.5rem; }
  .hero-title-sub  { font-size: 0.95rem; }
}

.hero-authors {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}
.author-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 0.15rem 1.25rem;
  margin-bottom: 0.25rem;
}
.author-name {
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
}
.author-affiliations {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 0.1rem 1.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.hero-conference {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 0.5rem;
}

/* ---- Pre-print & Cite buttons ---- */
.hero-buttons {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}
.btn-preprint,
.btn-cite {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  border: 1.5px solid var(--accent);
  text-decoration: none;
}
.btn-preprint {
  background: var(--accent);
  color: #fff;
}
.btn-preprint:hover {
  background: var(--color-accent-hover);
  text-decoration: none;
}
.btn-cite {
  background: transparent;
  color: var(--accent);
}
.btn-cite:hover {
  background: var(--accent-light);
}

.cite-block {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, margin 0.3s ease, border-color 0.3s ease;
  background: #f4f6fa;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  margin-top: 0;
}
.cite-block.open {
  max-height: 400px;
  margin-top: 0.6rem;
  border-color: var(--border);
}
.cite-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.cite-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.cite-copy-btn:hover {
  background: var(--accent-light);
  color: var(--accent);
}
.cite-block pre {
  margin: 0;
  padding: 0.6rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
}

.hero-abstract {
  max-width: 100%;
  margin-top: 1.5rem;
}
.hero-abstract-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin: 0 0 0.3rem;
}
.hero-abstract p {
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.6;
  text-align: justify;
  margin: 0;
}

/* ---- Architecture ---- */

/* Architecture mode tabs */
.arch-tab-nav {
  display: flex;
  gap: 0;
  margin-bottom: var(--space-sm);
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  border: 2px solid var(--color-border);
  background: var(--color-bg-secondary);
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}
.arch-tab-btn {
  flex: 1 1 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 0.9rem;
  font: 600 0.95rem/1.3 var(--font-sans);
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}
.arch-tab-btn + .arch-tab-btn {
  border-left: 2px solid var(--color-border);
}
.arch-tab-btn:hover {
  background: rgba(0,0,0,0.03);
  color: var(--color-text);
}
.arch-tab-btn.active {
  background: #fff;
  color: var(--color-accent);
  box-shadow: 0 1px 6px rgba(0,0,0,0.08);
}
.arch-tab-btn.active[data-arch="ontoagent"] { color: #1e40af; }
.arch-tab-btn.active[data-arch="llm"]       { color: #991b1b; }
.arch-tab-icon {
  font-size: 1.1rem;
  width: 1.6rem;
  text-align: center;
  flex-shrink: 0;
}
.arch-tab-label {
  font-weight: 700;
  font-size: 1rem;
}
.arch-tab-badge {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  opacity: 0.7;
}
.arch-tab-btn.active .arch-tab-badge { opacity: 1; }
@media (max-width: 640px) {
  .arch-tab-btn { flex-direction: column; gap: 0.25rem; padding: 0.7rem 0.5rem; }
  .arch-tab-badge { display: none; }
}

/* Architecture grid layout (diagram left, info panel right) */
.arch-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-md);
  align-items: start;
  max-width: 960px;
  margin: 0 auto;
}
@media (max-width: 860px) {
  .arch-layout {
    grid-template-columns: 1fr;
  }
}

/* Architecture diagram stack */
.arch-diagram-stack {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: visible;
  box-shadow: var(--shadow-md);
  background: #fff;
}
.arch-strategic-wrap {
  display: grid;
}
.arch-tactical-wrap {
  position: relative;
}
/* Stack both images in same grid cell so the taller one sets container height */
.arch-strategic-img {
  grid-area: 1 / 1;
  animation: archFadeIn 0.35s ease;
}
.arch-strategic-img img {
  width: 100%;
  display: block;
}
.arch-strategic-img[data-hidden] {
  visibility: hidden;
  pointer-events: none;
}
#arch-strategic-llm {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.arch-tactical-wrap img {
  width: 100%;
  display: block;
}

/* Hotspots (shared styles for strategic + tactical) */
.arch-strategic-img {
  position: relative;
}
.arch-diagram-stack .hotspot {
  position: absolute;
  width: 18px; height: 18px;
  margin-left: -9px; margin-top: -9px;
  cursor: pointer; z-index: 10;
  transition: all 0.2s ease;
}
.arch-diagram-stack .hotspot::before {
  content: ''; position: absolute; inset: 0;
  background: #ffd700; border: 2px solid #333; border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
  transition: all 0.2s ease;
}
.arch-diagram-stack .hotspot::after {
  content: ''; position: absolute; top: 50%; left: 50%;
  width: 6px; height: 6px; background: #065f46; border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.2s ease;
}
.arch-diagram-stack .hotspot:hover::before {
  background: #ffff00; transform: scale(1.15);
}
.arch-diagram-stack .hotspot.active::before {
  background: #ef4444; border-color: #991b1b;
  box-shadow: 0 0 10px rgba(239,68,68,0.7), 0 0 20px rgba(239,68,68,0.4), 0 0 30px rgba(239,68,68,0.2);
  transform: scale(1.2);
  animation: hotspotGlowRed 1.8s ease-in-out infinite;
}
.arch-diagram-stack .hotspot.active::after {
  background: #fff;
}
@keyframes hotspotGlowRed {
  0%, 100% { box-shadow: 0 0 10px rgba(239,68,68,0.7), 0 0 20px rgba(239,68,68,0.4), 0 0 30px rgba(239,68,68,0.2); }
  50%      { box-shadow: 0 0 14px rgba(239,68,68,0.9), 0 0 28px rgba(239,68,68,0.5), 0 0 42px rgba(239,68,68,0.25); }
}
/* Strategic hotspots use blue tint */
.hotspot.strategic::before {
  background: #60a5fa; border-color: #1e3a8a;
}
.hotspot.strategic::after {
  background: #1e3a8a;
}
.hotspot.strategic:hover::before {
  background: #93c5fd;
}
.hotspot.strategic.active::before {
  background: #ef4444; border-color: #991b1b;
  box-shadow: 0 0 10px rgba(239,68,68,0.7), 0 0 20px rgba(239,68,68,0.4), 0 0 30px rgba(239,68,68,0.2);
  transform: scale(1.2);
  animation: hotspotGlowRed 1.8s ease-in-out infinite;
}
.hotspot.strategic.active::after {
  background: #fff;
}
/* LLM strategic hotspots — warm amber/red tint */
.hotspot.strategic-llm::before {
  background: #fbbf24; border-color: #991b1b;
}
.hotspot.strategic-llm::after {
  background: #991b1b;
}
.hotspot.strategic-llm:hover::before {
  background: #fcd34d;
}
.hotspot.strategic-llm.active::before {
  background: #3b82f6; border-color: #1e3a8a;
  box-shadow: 0 0 10px rgba(59,130,246,0.7), 0 0 20px rgba(59,130,246,0.4), 0 0 30px rgba(59,130,246,0.2);
  transform: scale(1.2);
  animation: hotspotGlowBlue 1.8s ease-in-out infinite;
}
.hotspot.strategic-llm.active::after {
  background: #fff;
}
@keyframes hotspotGlowBlue {
  0%, 100% { box-shadow: 0 0 10px rgba(59,130,246,0.7), 0 0 20px rgba(59,130,246,0.4), 0 0 30px rgba(59,130,246,0.2); }
  50%      { box-shadow: 0 0 14px rgba(59,130,246,0.9), 0 0 28px rgba(59,130,246,0.5), 0 0 42px rgba(59,130,246,0.25); }
}

/* Architecture info panel (right side) */
.arch-info-panel {
  position: sticky;
  top: 80px;
  padding: var(--space-md);
  background: #f8faf8;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  line-height: 1.6;
  min-height: 120px;
  transition: all 0.25s ease;
}
.arch-info-hint {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #065f46;
  margin-bottom: 0.4rem;
}
.arch-info-hint i {
  color: #ffd700;
  font-size: 1rem;
}
.arch-info-hint-text {
  margin: 0;
  color: #777;
  font-size: 0.8rem;
}
.arch-info-content:not(:empty) {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
}
.arch-info-content h4 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  color: #065f46;
}
.arch-info-content p {
  margin: 0;
  color: #333;
}

@keyframes archFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.figure-caption {
  text-align: center; margin-top: var(--space-md); padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-card); border-radius: var(--radius-sm);
  color: var(--color-text-secondary); font-size: 0.85rem; line-height: 1.5;
}
.figure-caption p { margin: 0; }

/* ---- LLM Demo ---- */
.llm-demo-left {
  display: flex; flex-direction: column;
}
.llm-demo-tabs {
  display: flex; gap: 0; margin-bottom: var(--space-sm);
  border-radius: var(--radius-md); overflow: hidden;
  border: 2px solid var(--color-border);
}
.llm-demo-tab {
  flex: 1; padding: 0.55rem 0.75rem; font: 600 0.82rem/1.3 var(--font-sans);
  color: var(--color-text-secondary); background: var(--color-bg-secondary);
  border: none; cursor: pointer; transition: all 0.3s ease;
  display: flex; align-items: center; justify-content: center; gap: 0.4rem;
}
.llm-demo-tab + .llm-demo-tab { border-left: 2px solid var(--color-border); }
.llm-demo-tab:hover { background: rgba(0,0,0,0.03); }
.llm-demo-tab.active[data-llm-tab="success"] { background: #fff; color: #065f46; box-shadow: 0 1px 6px rgba(0,0,0,0.08); }
.llm-demo-tab.active[data-llm-tab="failure"] { background: #fff; color: #991b1b; box-shadow: 0 1px 6px rgba(0,0,0,0.08); }
.llm-demo-video-panel video {
  width: 100%; display: block; border-radius: 6px;
}

/* ---- Demo ---- */
.demo-overview-row {
  display: grid; grid-template-columns: 3fr 2fr; gap: var(--space-md);
  align-items: start; margin-bottom: var(--space-sm);
}
@media (max-width: 768px) {
  .demo-overview-row { grid-template-columns: 1fr; }
}
.demo-overview-text {
  font-size: 0.88rem; line-height: 1.6; color: var(--color-text-primary);
}
.demo-overview-text h4 { margin: 0 0 0.4rem; color: var(--color-accent); font-size: 0.95rem; }
.demo-overview-text h4:not(:first-child) { margin-top: 0.5rem; }
.demo-overview-text ul { margin: 0.4rem 0 0; padding-left: 1.2rem; }
.demo-overview-text li { margin-bottom: 0.4rem; }
.demo-intro-video {
  position: relative;
  border-radius: var(--radius-md); overflow: hidden;
  background: #1a1a2e;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: var(--space-sm);
}
.demo-intro-video video {
  width: 100%; display: block; border-radius: 6px;
}
.demo-intro-video-label {
  text-align: center; font-size: 0.75rem; color: #aaa;
  margin-top: 8px; font-weight: 500;
}
.demo-play-btn {
  position: absolute; bottom: 12px; left: 50%; transform: translateX(-50%);
  padding: 6px 18px; background: rgba(0,0,0,0.75); color: #fff;
  border: 1px solid rgba(255,255,255,0.3); border-radius: 20px;
  font-size: 0.8rem; font-weight: 500; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-sans); transition: all 0.2s ease;
  z-index: 5;
}
.demo-play-btn:hover { background: rgba(59,130,246,0.85); }
.scenario-card {
  background: var(--color-bg-secondary); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-md);
  position: relative; overflow: hidden;
}
.scenario-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 3px; height: 100%;
  background: var(--color-accent);
}
.scenario-label { display: inline-flex; align-items: center; gap: var(--space-xs); color: var(--color-accent); font-size: 0.8rem; font-weight: 600; margin-bottom: var(--space-xs); }
.scenario-text  { color: var(--color-text-primary); font-size: 0.9rem; line-height: 1.6; margin: 0; }
.scenario-text strong { color: var(--color-accent); }

/* Steps hint */
.demo-steps-hint {
  text-align: center; font-size: 0.78rem; color: var(--text-muted);
  margin: 0.4rem 0 0.3rem; padding: 0.35rem 0.75rem;
  background: var(--accent-light); border-radius: var(--radius-sm);
}
.demo-steps-hint i { margin-right: 0.3rem; color: var(--accent); }

/* Compact demo toolbar */
.demo-toolbar {
  display: flex; align-items: center; justify-content: center;
  gap: 6px; flex-wrap: wrap; padding: 8px 12px;
  background: var(--color-bg-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); margin-bottom: var(--space-md);
}
.demo-toolbar-sep {
  width: 1px; height: 20px; background: var(--color-border); margin: 0 4px;
}
.demo-btn {
  padding: 4px 10px; background: var(--color-bg-secondary);
  color: var(--color-text-primary); border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); font-size: 0.8rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition-fast);
  display: inline-flex; align-items: center; gap: 4px; font-family: var(--font-sans);
}
.demo-btn:hover:not(:disabled) { border-color: var(--color-accent); color: var(--color-accent); }
.demo-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.demo-btn.active { background: #d32f2f; color: #fff; border: none; }
.step-counter {
  font-size: 0.78rem; color: var(--color-text-secondary); padding: 4px 8px;
  background: var(--color-bg-tertiary); border-radius: var(--radius-sm);
}
.step-counter span { color: var(--color-accent); font-weight: 600; }
.step-nav-grid  { display: flex; flex-wrap: wrap; gap: 3px; }
.step-nav-btn {
  width: 26px; height: 26px; display: flex; align-items: center; justify-content: center;
  background: var(--color-bg-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); color: var(--color-text-secondary);
  font-size: 0.72rem; font-weight: 500; cursor: pointer; transition: all var(--transition-fast);
  font-family: var(--font-sans);
}
.step-nav-btn:hover    { border-color: var(--color-accent); color: var(--color-accent); }
.step-nav-btn.active   { background: var(--color-accent); color: #fff; border-color: transparent; }
.step-nav-btn.completed{ background: rgba(59,130,246,0.1); border-color: rgba(59,130,246,0.3); color: var(--color-accent); }

.demo-content {
  min-height: 50vh; max-height: 65vh; overflow-y: auto;
  background: #fffef5; border: 1px solid var(--color-border); border-radius: var(--radius-md);
}
.demo-step { display: none; padding: var(--space-lg) var(--space-xl); animation: fadeIn 0.3s ease; }
.demo-step.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.step-title { color: var(--color-text-primary); font-weight: 600; font-size: 1.1rem; margin-bottom: var(--space-md); display: flex; align-items: center; }
.step-number {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-accent); color: #fff;
  width: 24px; height: 24px; border-radius: 50%;
  font-size: 0.75rem; font-weight: 600; margin-right: 10px; flex-shrink: 0;
}
.step-content { font-size: 0.9rem; line-height: 1.6; color: var(--color-text-primary); }
.step-content p  { margin-bottom: var(--space-sm); }
.step-content h4 { color: var(--color-accent); font-size: 1rem; margin-bottom: var(--space-sm); margin-top: var(--space-md); }
.step-content ul { margin-bottom: var(--space-md); padding-left: 0; list-style: none; }
.step-content ul li { margin-bottom: 6px; padding-left: 8px; }
.step-content strong { color: var(--color-text-primary); }

.human-input {
  background: #fff8e1; border-left: 3px solid #f0b429;
  padding: 10px 12px; margin: var(--space-sm) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-style: italic; font-size: 0.9rem;
}
.robot-response {
  background: #fffde7; border-left: 3px solid #fdd835;
  padding: 10px 12px; margin: var(--space-sm) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 0.9rem;
}
.code-block, pre.code-block {
  background: #fefdf0; border: 1px solid #e8dfa0;
  border-radius: var(--radius-sm); padding: var(--space-sm) var(--space-md); margin: var(--space-sm) 0;
  font-family: 'Consolas', 'Monaco', monospace; font-size: 0.8rem; line-height: 1.4;
  overflow-x: auto; white-space: pre-wrap; word-wrap: break-word; color: #333;
}
pre.code-block code { background: transparent; border: none; padding: 0; }

/* OntoAgent script highlighting */
.code-kw   { color: #1755c4; font-weight: 700; }
.code-sect { color: #0d6b5c; font-weight: 700; }
.code-cm   { color: #5a8a40; font-style: italic; }
.code-id   { color: #92400e; }
.code-op   { color: #6d28d9; font-weight: 600; }
.code-proc { color: #1e40af; font-style: italic; }

/* ---- Results section ---- */
.results-table {
  width: auto; max-width: 700px;
  margin: 0 auto var(--space-xl);
  border-collapse: collapse;
  font-size: 0.82rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.results-table thead th {
  background: var(--bg-alt);
  padding: 0.5rem 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  text-align: center;
}
.results-table thead th:first-child { text-align: left; }
.results-table tbody td {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.results-table tbody td:first-child { text-align: left; font-weight: 500; }
.results-table tbody tr:last-child td { border-bottom: none; }
.results-table .study-header td {
  background: var(--accent-light);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--accent);
  font-style: italic;
  text-align: left;
}
.val-good { color: #16a34a; font-weight: 600; }
.val-bad  { color: #dc2626; font-weight: 600; }
.val-mid  { color: #d97706; font-weight: 600; }

/* Capability comparison table */
.cap-table {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-xl);
  font-size: 0.875rem;
}
.cap-table-head,
.cap-table-row {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr;
}
.cap-table-head {
  background: var(--bg-alt);
  border-bottom: 2px solid var(--border);
}
.cap-table-head > div {
  padding: 0.4rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.cap-table-head .cap-col-onto { color: #15803d; }
.cap-table-head .cap-col-llm  { color: #b91c1c; }
.cap-table-row { border-bottom: 1px solid var(--border); }
.cap-table-row:last-child { border-bottom: none; }
.cap-table-row:nth-child(even) { background: var(--bg-alt); }
.cap-table-row > div { padding: 0.5rem 0.75rem; line-height: 1.4; }
.cap-col-cap {
  display: flex; gap: 0.65rem; align-items: flex-start;
  border-right: 1px solid var(--border);
}
.cap-col-cap strong { display: block; color: var(--text); font-size: 0.875rem; margin-bottom: 0.2rem; }
.cap-col-cap p { margin: 0; font-size: 0.8rem; color: var(--text-muted); line-height: 1.45; }
.cap-row-icon { color: var(--accent); font-size: 0.95rem; margin-top: 0.2rem; flex-shrink: 0; }
.cap-col-onto { color: #166534; background: #f0fdf4; border-right: 1px solid var(--border); font-size: 0.82rem; }
.cap-col-llm  { color: #991b1b; background: #fef2f2; font-size: 0.82rem; }
.cap-pass { color: #16a34a; font-weight: 700; }
.cap-fail { color: #dc2626; font-weight: 700; }
.cap-part { color: #d97706; font-weight: 700; }

/* Finding callout */
.finding-callout {
  background: linear-gradient(135deg, #dbeafe 0%, #eff6ff 100%);
  border: 1px solid #93c5fd; border-left: 4px solid var(--accent);
  border-radius: var(--radius-md); padding: var(--space-sm);
  margin-bottom: var(--space-sm);
}
.finding-callout p { color: var(--text); margin-bottom: 0; }
.finding-stats { display: flex; gap: var(--space-xl); margin-top: var(--space-md); flex-wrap: wrap; }
.stat-item {
  display: flex; flex-direction: column; align-items: center;
  text-align: center; flex: 1; min-width: 140px;
}
.stat-number { font-size: 2.4rem; font-weight: 800; color: var(--accent); line-height: 1; }
.stat-label {
  font-size: 0.78rem; color: var(--text-muted); margin-top: 6px;
  max-width: 130px; line-height: 1.4;
}

.section-intro {
  font-size: 0.93rem; color: var(--text); line-height: 1.6;
  margin-bottom: var(--space-sm);
}
.subsection-title {
  font-size: 1.05rem; font-weight: 700; color: var(--text);
  margin: var(--space-md) 0 var(--space-sm);
  padding-bottom: 0.25rem; border-bottom: 2px solid var(--border);
}

/* ---- Study Tabs ---- */
.study-tabs {
  margin: var(--space-sm) 0;
}
.study-choose-label {
  text-align: center; font-size: 0.82rem; font-weight: 600;
  color: var(--text-muted); margin: 0 0 0.3rem;
  letter-spacing: 0.02em;
}
.study-choose-label i { margin-right: 0.35rem; color: var(--accent); }

.study-tab-nav {
  display: flex;
  gap: 8px;
  margin-bottom: var(--space-md);
  padding: 6px;
  background: var(--bg-alt);
  border-radius: var(--radius-md, 8px);
  border: 1px solid var(--border);
}
.study-tab-btn {
  flex: 1 1 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.55rem 0.75rem;
  font: 600 0.88rem/1.3 var(--font-sans);
  color: var(--text-muted);
  background: transparent;
  border: 2px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
}
.study-tab-btn:hover {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}
.study-tab-btn.active {
  background: #fff;
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(29,78,216,0.15);
}
/* Per-study color coding */
.study-tab-btn[data-study="study1"].active { border-color: #7c3aed; color: #7c3aed; }
.study-tab-btn[data-study="study1"].active .study-tab-num { background: #7c3aed; }
.study-tab-btn[data-study="study2"].active { border-color: #0891b2; color: #0891b2; }
.study-tab-btn[data-study="study2"].active .study-tab-num { background: #0891b2; }
.study-tab-btn[data-study="study3"].active { border-color: #c2410c; color: #c2410c; }
.study-tab-btn[data-study="study3"].active .study-tab-num { background: #c2410c; }
.study-tab-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  background: var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: all 0.25s ease;
}
.study-tab-btn.active .study-tab-num {
  background: var(--accent);
  color: #fff;
}
.study-tab-label {
  white-space: nowrap;
}
@media (max-width: 640px) {
  .study-tab-label { display: none; }
  .study-tab-btn::after {
    content: attr(data-study-short);
    font-size: 0.78rem;
  }
}

/* Study pane show/hide */
.study-pane {
  display: none;
  animation: studyFadeIn 0.35s ease;
  border-left: 3px solid var(--border);
  padding-left: var(--space-lg);
  margin-left: 2px;
}
.study-pane.active {
  display: block;
}
#study1.active { border-left-color: #7c3aed; }
#study2.active { border-left-color: #0891b2; }
#study3.active { border-left-color: #c2410c; }
.study-intro {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.55;
  max-width: none;
  text-align: justify;
  margin: var(--space-sm) 0 var(--space-sm);
}
@keyframes studyFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Chart Insight Controller ---- */
.chart-insight-wrapper {
  margin: var(--space-sm) 0;
}
.insight-panel {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md, 8px);
  margin-bottom: var(--space-md);
  overflow: hidden;
}
.insight-nav {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: thin;
}
.insight-btn {
  flex: 1 1 0;
  min-width: max-content;
  padding: 0.45rem 0.75rem;
  font: 500 0.82rem/1.2 var(--font-sans);
  color: var(--text-muted);
  background: var(--bg-alt);
  border: none;
  border-right: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  position: relative;
}
.insight-btn:last-child { border-right: none; }
.insight-btn:hover { background: #e8eeff; color: var(--text); }
.insight-btn.active {
  background: #fff;
  color: var(--accent);
  font-weight: 600;
  box-shadow: inset 0 -2.5px 0 var(--accent);
}
.insight-body {
  padding: 0.6rem 1rem;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text);
  min-height: 90px;
  animation: insightFade 0.35s ease;
}
.insight-body strong { color: var(--text); }
.insight-body .insight-stat {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
  padding: 0.15em 0.5em;
  border-radius: 4px;
  font-size: 0.88em;
}
.insight-body .insight-highlight {
  border-left: 3px solid var(--accent);
  padding-left: 0.75rem;
  margin: 0.6rem 0;
  color: var(--text-muted);
  font-style: italic;
}
@keyframes insightFade {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* LLM failure panels */
.llm-failure-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); margin: var(--space-lg) 0; }
.llm-panel { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.llm-panel-header { background: #fee2e2; padding: 0.6rem var(--space-md); font-size: 0.82rem; font-weight: 700; color: #991b1b; border-bottom: 1px solid #fca5a5; }
.llm-panel-body { padding: var(--space-md); }
.llm-action-log { padding: var(--space-md); background: #f8fafc; border-top: 1px solid #e2e8f0; border-bottom: 1px solid #e2e8f0; }
.llm-msg {
  font-size: 0.82rem; line-height: 1.55; padding: 7px 11px;
  border-radius: 5px; margin-bottom: 6px;
}
.llm-msg.human-input    { background: #fff8e1; color: #78350f; border-left: 3px solid #f59e0b; }
.llm-msg.robot-response { background: #eff6ff; color: #1e3a5f; border-left: 3px solid #60a5fa; }
.llm-msg.llm-bad        { background: #fff1f2; color: #9f1239; border-left: 3px solid #fb7185; }

/* ---- Video placeholder ---- */
.video-placeholder-wrap {
  position: relative; width: 100%; padding-bottom: 56.25%;
  background: #0f172a; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border);
}
.video-placeholder-wrap iframe,
.video-placeholder-wrap video {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none;
}
.video-placeholder-inner {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; color: #94a3b8; gap: 1rem;
}

/* ---- Prose Points (light background block) ---- */
.prose-points {
  background: #f5f7fa;
  border: 1px solid #e5e9f0;
  border-radius: 6px;
  padding: 0.75rem 1.25rem;
  margin-bottom: var(--space-sm);
}
.prose-points p {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.prose-points p:last-child {
  margin-bottom: 0;
}
.prose-points strong {
  color: var(--text);
}

/* Demo video section */
.demo-video-section { margin: var(--space-lg) 0; padding: var(--space-lg); background: var(--bg-alt); border-radius: var(--radius-md); border: 1px solid var(--border); }
.demo-video-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.4rem; }
.demo-video-title i { margin-right: 0.5rem; color: var(--color-accent); }
.demo-video-desc { color: var(--text-muted); font-size: 0.92rem; margin-bottom: var(--space-md); }
.full-width-video-container { margin: var(--space-md) 0; width: 100%; }
.full-demo-video { width: 100%; border-radius: var(--radius-sm); box-shadow: var(--shadow-md); }


/* ---- References ---- */
.references-details { margin-top: 0.5rem; }
.references-toggle {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.75rem 1rem; background: var(--accent-light);
  border: 1px solid var(--border); border-radius: var(--radius);
  cursor: pointer; font-size: 0.9rem; font-weight: 600;
  color: var(--accent); list-style: none; user-select: none;
  transition: background 0.15s;
}
.references-toggle::-webkit-details-marker { display: none; }
.references-toggle:hover { background: #d0e1fc; }
.references-toggle i { font-size: 0.75rem; transition: transform 0.2s; }
.references-details[open] .references-toggle i { transform: rotate(180deg); }

.references-list {
  list-style: none; counter-reset: refs;
  margin: 0.5rem 0 0 0; padding: 0;
}
.references-list li {
  counter-increment: refs;
  display: flex; align-items: flex-start; gap: 0.75rem;
  padding: 0.3rem 0; border-bottom: 1px solid var(--border);
  font-size: 0.85rem; color: var(--text); line-height: 1.5;
}
.references-list li:last-child { border-bottom: none; }
.references-list li::before {
  content: '[' counter(refs) ']';
  font-family: var(--font-mono); font-size: 0.82rem;
  color: var(--accent); font-weight: 700; flex-shrink: 0;
  min-width: 2.5rem; padding-top: 0.2rem; text-align: right;
}

/* ---- Glossary ---- */
.gloss-search-wrap { margin-bottom: 1rem; text-align: center; }
.gloss-search-input {
  width: 100%; max-width: 440px;
  padding: 0.65rem 1.1rem; border: 2px solid var(--border); border-radius: 24px;
  font-size: 0.92rem; font-family: var(--font-sans);
  background: #fff; color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.gloss-search-input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(21,79,200,0.12);
}
.gloss-container {
  max-width: 900px; margin-inline: auto;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-md); max-height: 640px;
  overflow-y: auto; padding: var(--space-sm);
  box-shadow: 0 4px 20px rgba(30,60,120,0.07);
}
.gloss-term {
  background: var(--bg-alt); border: 1px solid var(--border);
  border-radius: 6px; padding: 0.5rem 0.75rem; margin: 0.35rem 0;
  transition: box-shadow 0.15s, border-color 0.15s;
}
.gloss-term:hover { box-shadow: 0 4px 12px rgba(30,60,120,0.09); border-color: var(--accent); }
.gloss-inner { display: flex; align-items: flex-start; gap: 0.85rem; }
.gloss-badge {
  width: 36px; height: 36px; min-width: 36px;
  background: var(--accent); color: #fff; border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1rem;
}
.gloss-body { flex: 1; }
.gloss-title { font-size: 0.92rem; font-weight: 600; color: var(--text); margin: 0 0 0.35rem; }
.gloss-def { font-size: 0.83rem; line-height: 1.6; color: var(--text-muted); margin: 0; }

/* Alphabet nav */
.gloss-alpha-nav {
  display: flex; flex-wrap: wrap; gap: 0.3rem; justify-content: center;
  margin-bottom: 1rem;
}
.gloss-alpha-btn {
  border: 1px solid var(--border); background: #fff; color: var(--text);
  border-radius: var(--radius-sm); padding: 0.25rem 0.55rem;
  font-size: 0.78rem; font-weight: 500; cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.gloss-alpha-btn:hover { border-color: var(--accent); color: var(--accent); }
.gloss-alpha-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Letter headers */
.gloss-alpha-header {
  font-size: 0.95rem; font-weight: 700; color: var(--accent);
  margin: 0.6rem 0 0.15rem; padding-bottom: 0.15rem;
  border-bottom: 2px solid var(--accent-light);
}

/* Collapse wrap & toggle */
.gloss-collapse-wrap {
  max-height: 640px; overflow: hidden;
  transition: max-height 0.4s ease;
}
.gloss-collapse-wrap.expanded { max-height: none; }
.gloss-toggle-btn {
  display: flex; align-items: center; justify-content: center; gap: 0.4rem;
  margin: 0.4rem auto 0; padding: 0.35rem 1rem;
  border: 1px solid var(--border); border-radius: var(--radius-full);
  background: #fff; color: var(--text-muted); font-size: 0.8rem;
  cursor: pointer; transition: all var(--transition-fast);
}
.gloss-toggle-btn:hover { border-color: var(--accent); color: var(--accent); }
.gloss-toggle-btn i { transition: transform 0.3s ease; }
.gloss-collapse-wrap.expanded + .gloss-toggle-btn i { transform: rotate(180deg); }

/* ---- Modal ---- */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.8); align-items: center; justify-content: center; padding: 1rem;
}
.modal-overlay.active { display: flex; }
.modal {
  background: #fff; border-radius: var(--radius-md);
  max-width: 1000px; width: 100%; position: relative;
  max-height: 90vh; overflow-y: auto;
}
.modal-close {
  position: absolute; top: 0.75rem; right: 0.75rem;
  background: #f1f5f9; border: none; cursor: pointer;
  width: 32px; height: 32px; border-radius: 50%;
  font-size: 1.2rem; display: flex; align-items: center; justify-content: center;
  color: #64748b; z-index: 1;
}
.modal-close:hover { background: #e2e8f0; color: var(--text); }
.modal-body { padding: 1.5rem; }
.modal-body video { width: 100%; border-radius: var(--radius-sm); }
.modal-body img   { max-width: 90vw; max-height: 80vh; object-fit: contain; display: block; margin: auto; }
.modal-caption {
  text-align: center; padding: 0.75rem 1rem 1.25rem;
  color: var(--text-muted); font-size: 0.85rem;
}
.image-modal .modal { max-width: 90vw; background: #000; }

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--border);
  padding-block: 0.6rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---- Responsive ---- */
@media (max-width: 1100px) {
  .llm-failure-grid { grid-template-columns: 1fr; }
}
@media (max-width: 1024px) {
  .page-wrapper { display: block; padding-inline: 1rem; }
  #topbar { display: flex; }
  #hero { padding-top: calc(var(--topbar-height) + 2.5rem); }
  #sidebar {
    position: fixed; top: 0; left: 0;
    width: var(--sidebar-width); height: 100vh;
    max-height: none; margin: 0; border-radius: 0;
    border: none; border-right: 1px solid var(--border);
    box-shadow: 4px 0 20px rgba(0,0,0,0.12);
    transform: translateX(-100%);
    transition: transform 0.25s ease; z-index: 300;
  }
  #sidebar.open { transform: translateX(0); }
  #sidebar-backdrop.visible { display: block; }
}
@media (max-width: 768px) {
  :root { --section-gap: 2rem; }
  .rc-item dd { padding-left: 0; }
  .demo-toolbar { padding: 6px 8px; gap: 4px; }
  .step-nav-btn  { width: 24px; height: 24px; font-size: 0.7rem; }
  .demo-step     { padding: var(--space-md); }
  .finding-stats { flex-direction: column; align-items: center; gap: var(--space-md); }
  .cap-table-head, .cap-table-row { grid-template-columns: 1fr; }
  .cap-col-onto, .cap-col-llm { border-right: none; }
}