/* =============================================
   Nauta Research Labs — Clean Research Lab Theme
   Light mode default + dark mode toggle
   ============================================= */

/* ---------- Design tokens ---------- */
:root {
  /* Light mode (default) */
  --bg: #F7F8FA;
  --bg-card: #FFFFFF;
  --bg-subtle: #F0F1F5;
  --bg-hero: #FAFBFC;

  --text: #111827;
  --text-secondary: #374151;
  --text-muted: #6B7280;
  --text-faint: #9CA3AF;

  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-light: rgba(37, 99, 235, 0.08);
  --accent-border: rgba(37, 99, 235, 0.2);

  --teal: #14B8A6;
  --teal-light: rgba(20, 184, 166, 0.08);

  --border: #E5E7EB;
  --border-subtle: #F3F4F6;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.05), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.05), 0 4px 6px rgba(0,0,0,0.03);

  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --max: 1120px;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Severity colors */
  --red: #DC2626;
  --red-light: rgba(220, 38, 38, 0.08);
  --red-border: rgba(220, 38, 38, 0.2);
  --orange: #EA580C;
  --orange-light: rgba(234, 88, 12, 0.08);
  --orange-border: rgba(234, 88, 12, 0.2);
  --green: #16A34A;
  --green-light: rgba(22, 163, 74, 0.08);
  --green-border: rgba(22, 163, 74, 0.2);
}

/* ---------- Dark mode ---------- */
[data-theme="dark"] {
  --bg: #0F172A;
  --bg-card: #1E293B;
  --bg-subtle: #1E293B;
  --bg-hero: #0F172A;

  --text: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --text-faint: #64748B;

  --accent: #60A5FA;
  --accent-hover: #93C5FD;
  --accent-light: rgba(96, 165, 250, 0.12);
  --accent-border: rgba(96, 165, 250, 0.25);

  --teal: #2DD4BF;
  --teal-light: rgba(45, 212, 191, 0.12);

  --border: #334155;
  --border-subtle: #1E293B;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.3), 0 2px 4px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.3), 0 4px 6px rgba(0,0,0,0.2);

  --red-light: rgba(220, 38, 38, 0.15);
  --red-border: rgba(220, 38, 38, 0.3);
  --orange-light: rgba(234, 88, 12, 0.15);
  --orange-border: rgba(234, 88, 12, 0.3);
  --green-light: rgba(22, 163, 74, 0.15);
  --green-border: rgba(22, 163, 74, 0.3);
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a { color: var(--accent); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--accent-hover); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

img { max-width: 100%; height: auto; display: block; }

/* ---------- Layout ---------- */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 248, 250, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background-color 0.3s ease;
}

[data-theme="dark"] header {
  background: rgba(15, 23, 42, 0.85);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  min-width: 0;
}

.brandMark {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  overflow: hidden;
  flex-shrink: 0;
}

.brandMark img {
  width: 36px;
  height: 36px;
  display: block;
  object-fit: contain;
}

.brand .name {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.brand .name strong {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  color: var(--text);
}

.brand .name span {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Nav */
.nav-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

nav {
  display: flex;
  gap: 2px;
  align-items: center;
}

nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

nav a:hover,
nav a.active {
  color: var(--accent);
  background: var(--accent-light);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  cursor: pointer;
  color: var(--text);
}

.nav-toggle svg { display: block; }

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  cursor: pointer;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-light);
}

.theme-toggle svg { display: block; width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

/* ---------- Main ---------- */
main { padding: 32px 0 48px; }

/* ---------- Hero ---------- */
.hero {
  padding: 48px 0 40px;
  text-align: left;
}

.hero-content { max-width: 680px; }

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 16px;
  font-family: var(--font-mono);
}

.hero-tag .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  max-width: 70ch;
  color: var(--text);
}

.hero .lead {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 65ch;
  margin: 0 0 24px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  line-height: 1.4;
}

.btn:hover {
  border-color: var(--accent-border);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
  font-weight: 600;
}

.btn.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #FFFFFF;
  box-shadow: var(--shadow-md);
}

.btn.secondary {
  border-color: var(--accent-border);
  color: var(--accent);
  background: var(--bg-card);
}

.btn.secondary:hover {
  background: var(--accent-light);
  border-color: var(--accent);
}

.btn.small {
  padding: 6px 12px;
  font-size: 13px;
}

/* ---------- Sections ---------- */
section { padding: 40px 0; }

.section-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 8px;
  font-family: var(--font-mono);
}

.section-title {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  color: var(--text);
}

.section-desc {
  margin: 0 0 32px;
  color: var(--text-secondary);
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.7;
}

/* Section link */
.section-link {
  margin-top: 24px;
  text-align: left;
}

.text-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  transition: gap 0.15s ease;
}

.text-link:hover { opacity: 0.8; }

/* Section alternate background */
.section-alt {
  background: var(--bg-subtle);
  padding: 48px 0;
  margin: 48px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

/* Link arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  margin-top: 12px;
  transition: gap 0.15s ease;
}

.link-arrow:hover { gap: 8px; }

/* ---------- Cards ---------- */
.card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
  padding: 24px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent-border);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

.card ul {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 14px;
}

.card li { margin: 4px 0; }

/* Card grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* Icon box for cards */
.icon-box {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  margin-bottom: 12px;
  flex-shrink: 0;
}

.icon-box svg { color: var(--accent); }

.icon-box.teal { background: var(--teal-light); }
.icon-box.teal svg { color: var(--teal); }

/* ---------- Tags / chips ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.tag:hover,
.tag.active {
  border-color: var(--accent-border);
  background: var(--accent-light);
  color: var(--accent);
}

/* Pill tags (small inline tags inside cards) */
.pill-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--accent-light);
  color: var(--accent);
  letter-spacing: 0.02em;
}

/* ---------- Stat strip ---------- */
.stat-strip {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 40px 0;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.4;
}

/* ---------- Publication list ---------- */
.pub-list { margin-top: 24px; }

.pub-item {
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  margin-bottom: 16px;
  transition: box-shadow 0.2s ease;
}

.pub-item:hover { box-shadow: var(--shadow-md); }

.pub-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 4px;
  color: var(--text);
}

.pub-authors {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 4px;
}

.pub-venue {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
  margin: 0 0 8px;
}

.pub-abstract {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 8px 0;
  display: none;
}

.pub-abstract.show { display: block; }

.pub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  align-items: center;
}

.pub-links .btn { padding: 5px 12px; font-size: 12px; }

.abstract-toggle {
  cursor: pointer;
}

/* ---------- Project cards ---------- */
.project-card .tags { margin-top: auto; }

/* ---------- People cards ---------- */
.people-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
  padding: 24px;
  text-align: center;
  transition: box-shadow 0.2s ease;
}

.people-card:hover { box-shadow: var(--shadow-md); }

.people-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}

.people-card h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 600;
}

.people-role {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  margin: 0 0 12px;
}

.people-bio {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 16px;
}

.people-links {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Filter bar ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  align-items: center;
}

.filter-bar .search-input {
  flex: 1;
  min-width: 200px;
  max-width: 320px;
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

.filter-bar .search-input::placeholder { color: var(--text-faint); }

.filter-bar .search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.filter-bar select {
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  outline: none;
}

/* ---------- Charts section ---------- */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.chart-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
  padding: 20px;
}

.chart-card img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
  margin: 12px 0 8px;
}

.chart-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.chart-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.chart-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-top: 2px;
}

.chip {
  display: inline-flex;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--text-muted);
  white-space: nowrap;
}

.chart-note {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

/* ---------- Intel section (AI Governance) ---------- */
.intel-block { margin-bottom: 40px; }

.intel-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.intel-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.intel-header h3 {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 600;
}

.intel-header p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 70ch;
}

.intel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.intel-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
  padding: 20px;
}

.interactive-chart { position: relative; margin: 12px 0; }

.chart-svg {
  width: 100%;
  height: auto;
  display: block;
}

.chart-bar {
  transition: opacity 0.2s ease;
  cursor: pointer;
}

.chart-bar-group:hover .chart-bar { opacity: 1 !important; filter: brightness(1.1); }

.timeline-node { cursor: pointer; }
.timeline-node:hover circle { filter: brightness(1.2); }

.chart-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  color: var(--text);
  font-size: 12px;
  max-width: 280px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 10;
  line-height: 1.5;
  box-shadow: var(--shadow-lg);
}

.chart-tooltip.visible { opacity: 1; }

/* Stat row */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.stat-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  padding: 16px;
  text-align: center;
}

/* ---------- Bridge model ---------- */
.framework-visual { margin-top: 20px; }

.framework-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.03em;
  margin: 0 0 6px;
}

.bridge-model {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: stretch;
  margin-top: 16px;
}

.bridge-col { display: flex; flex-direction: column; gap: 8px; }

.bridge-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.bridge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.4;
  transition: transform 0.15s ease;
}

.bridge-item:hover { transform: translateY(-1px); }

.gap-item {
  background: var(--red-light);
  border: 1px solid var(--red-border);
  color: var(--text);
}

.solution-item {
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  color: var(--text);
}

.bridge-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
}

.gap-item .bridge-icon { background: var(--red-light); color: var(--red); }
.bridge-icon.sol { background: var(--accent-light); color: var(--accent); }

.bridge-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 4px;
}

.bridge-center-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  text-align: center;
  line-height: 1.3;
}

.bridge-arrow-svg { width: 50px; height: 24px; }

/* ---------- Pipeline flow ---------- */
.pipeline-flow {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin-top: 20px;
  overflow-x: auto;
}

.pipeline-stage {
  flex: 1;
  min-width: 160px;
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.pipeline-stage:hover {
  border-color: var(--accent-border);
  box-shadow: var(--shadow-md);
}

.pipeline-num {
  width: 28px;
  height: 28px;
  border-radius: var(--radius);
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.pipeline-stage h4 {
  margin: 4px 0 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.pipeline-method {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.pipeline-stage p {
  margin: 2px 0 0;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.5;
  flex: 1;
}

.pipeline-ref {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
  padding-top: 6px;
  border-top: 1px dashed var(--border);
}

.pipeline-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 18px;
  padding: 0 8px;
  opacity: 0.5;
}

/* Pipeline outcomes */
.pipeline-outcomes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.outcome-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--accent-border);
  background: var(--accent-light);
}

.outcome-card svg { flex-shrink: 0; margin-top: 2px; }
.outcome-card strong { display: block; font-size: 13px; margin-bottom: 4px; color: var(--text); }
.outcome-card span { color: var(--text-secondary); font-size: 12px; line-height: 1.4; }

/* ---------- Source row ---------- */
.source-row {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 12px;
  flex-wrap: wrap;
}

.source-chip {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ---------- Framework panels ---------- */
.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.panel {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
  padding: 24px;
}

.panel h3 { margin: 0 0 8px; font-size: 16px; font-weight: 600; color: var(--text); }

.panel ul {
  margin: 10px 0 0;
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 14px;
}

.panel li { margin: 5px 0; }

/* ---------- Contact ---------- */
.contact-box { max-width: 640px; }

form.contactForm {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}

form.contactForm .full { grid-column: span 2; }

input, textarea, select {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  padding: 10px 14px;
  font-size: 14px;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea { min-height: 120px; resize: vertical; }

input:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

input::placeholder, textarea::placeholder { color: var(--text-faint); }

/* ---------- Footer ---------- */
footer {
  margin-top: 48px;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links a { color: var(--text-secondary); font-size: 13px; }
.footer-links a:hover { color: var(--accent); }

/* ---------- Blog / Article ---------- */
.article-wrap {
  max-width: 72ch;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 32px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  align-items: center;
}

.prose {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.75;
  color: var(--text);
}

.prose h2 {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 700;
  margin: 40px 0 12px;
  letter-spacing: -0.01em;
  color: var(--text);
}

.prose h3 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  margin: 28px 0 8px;
  color: var(--text);
}

.prose h4 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 8px;
  color: var(--text);
}

.prose p {
  margin: 0 0 16px;
  color: var(--text);
}

.prose ul, .prose ol {
  margin: 0 0 16px;
  padding-left: 20px;
}

.prose li { margin: 4px 0; }

.prose strong { font-weight: 600; color: var(--text); }

.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.prose a:hover { color: var(--accent-hover); }

/* TOC */
.toc {
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin: 24px 0;
}

.toc-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 500;
}

.toc ol { margin: 0; padding-left: 20px; color: var(--text-secondary); font-size: 14px; font-family: var(--font-sans); }
.toc a { color: var(--text-secondary); text-decoration: none; }
.toc a:hover { color: var(--accent); }

/* Callout */
.callout {
  border: 1px solid var(--accent-border);
  background: var(--accent-light);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin: 20px 0;
  font-family: var(--font-sans);
  font-size: 14px;
}

.callout strong { display: block; margin-bottom: 6px; color: var(--text); }
.callout ul { margin: 0; padding-left: 18px; color: var(--text-secondary); }

.callout-warning {
  border-color: var(--orange-border);
  background: var(--orange-light);
}

/* Equation / model boxes */
.equation-box,
.model-box {
  margin: 20px 0;
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  font-family: var(--font-sans);
  font-size: 14px;
}

.equation-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.equation-box p { color: var(--text-secondary); margin: 8px 0; font-family: var(--font-sans); font-size: 14px; }
.equation-box ul, .equation-box ol { margin: 8px 0 0; padding-left: 18px; color: var(--text-secondary); font-family: var(--font-sans); font-size: 14px; }

.model-box h4 { margin: 0 0 8px; font-size: 15px; }
.model-box p { margin: 8px 0; color: var(--text-secondary); font-family: var(--font-sans); font-size: 14px; }
.model-box ol { margin: 8px 0 0; padding-left: 18px; color: var(--text-secondary); font-family: var(--font-sans); font-size: 14px; }

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
  font-family: var(--font-sans);
}

.table th, .table td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}

.table th {
  background: var(--accent-light);
  color: var(--text);
  font-weight: 600;
}

.table td { color: var(--text-secondary); }

/* Figures */
.figure {
  margin: 20px 0;
  padding: 12px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.graph-container {
  background: #FFFFFF;
  border-radius: var(--radius);
  padding: 10px;
  border: 1px solid var(--border-subtle);
  overflow: hidden;
}

[data-theme="dark"] .graph-container {
  background: #1E293B;
}

.graph-container svg { display: block; width: 100%; height: auto; }

.figure-caption, .caption {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 12px;
  font-family: var(--font-sans);
}

/* Severity pills */
.severity-medium, .severity-high, .severity-critical {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.severity-medium { color: var(--teal); background: var(--teal-light); border: 1px solid rgba(20, 184, 166, 0.3); }
.severity-high { color: var(--orange); background: var(--orange-light); border: 1px solid var(--orange-border); }
.severity-critical { color: var(--red); background: var(--red-light); border: 1px solid var(--red-border); }

/* Framework flow (article inline) */
.framework-flow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--accent-border);
  background: var(--accent-light);
  margin: 20px 0;
  font-family: var(--font-sans);
}

.flow-step {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 13px;
  color: var(--text);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.flow-arrow { color: var(--accent); font-size: 16px; line-height: 1; }

/* Defense cards */
.defense-layer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 16px 0 20px;
}

.defense-card {
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.defense-card h5 { margin: 0 0 6px; font-size: 14px; color: var(--text); }
.defense-card p { margin: 0; color: var(--text-secondary); font-size: 13px; }

/* References */
.references { margin-top: 32px; padding-top: 16px; border-top: 1px solid var(--border); }
.references ol { color: var(--text-secondary); padding-left: 20px; font-family: var(--font-sans); font-size: 14px; }
.references li { margin-bottom: 8px; }

/* MathJax */
.prose mjx-container { max-width: 100%; overflow-x: auto; overflow-y: hidden; padding-bottom: 2px; }
.prose mjx-container[display="true"] { margin: 12px 0 !important; }

/* ---------- Founder Profile ---------- */
.founder-profile {
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.founder-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px;
  border-bottom: 1px solid var(--border);
  background: var(--accent-light);
  flex-wrap: wrap;
}

.founder-info h3 { margin: 0 0 2px; font-size: 18px; }

.founder-title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

.founder-badges { display: flex; gap: 6px; flex-wrap: wrap; }

.founder-badge {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--accent-border);
  background: var(--accent-light);
  color: var(--accent);
  font-size: 11px;
  font-family: var(--font-mono);
}

.founder-grid { display: grid; grid-template-columns: 1fr 1fr; }

.founder-col { padding: 24px; }
.founder-col:first-child { border-right: 1px solid var(--border); }

.founder-col h4 {
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--accent);
}

.founder-col p {
  margin: 0 0 12px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

.founder-experience {
  padding: 24px;
  border-top: 1px solid var(--border);
}

.founder-experience h4 {
  margin: 0 0 16px;
  font-size: 15px;
  color: var(--accent);
}

.exp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.exp-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  transition: border-color 0.2s ease;
}

.exp-item:hover { border-color: var(--accent-border); }

.exp-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  flex-shrink: 0;
}

.exp-item strong { display: block; font-size: 13px; margin-bottom: 4px; color: var(--text); }
.exp-item span { color: var(--text-secondary); font-size: 12px; line-height: 1.4; }

.founder-cta {
  padding: 24px;
  border-top: 1px solid var(--border);
  background: var(--accent-light);
  display: flex;
  align-items: center;
  gap: 20px;
}

.founder-cta p { margin: 0; color: var(--text-secondary); font-size: 14px; line-height: 1.6; flex: 1; }

/* SVG color overrides for light/dark */
.chart-svg text { fill: var(--text-muted); }

/* ---------- Copy citation button ---------- */
.copy-cite {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 10px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-sans);
}

.copy-cite:hover {
  border-color: var(--accent-border);
  color: var(--accent);
  background: var(--accent-light);
}

.copy-cite.copied {
  color: var(--green);
  border-color: var(--green-border);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .charts-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .pipeline-outcomes { grid-template-columns: repeat(2, 1fr); }
  .defense-layer { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .wrap { padding: 0 16px; }

  .topbar { flex-wrap: wrap; }

  nav { display: none; }
  nav.open { display: flex; flex-direction: column; width: 100%; gap: 0; order: 3; }
  nav.open a { padding: 10px 0; }

  .nav-toggle { display: flex; }

  .hero { padding: 32px 0 24px; }
  .hero h1 { font-size: 28px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
  .intel-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
  .panel-grid { grid-template-columns: 1fr; }

  .bridge-model { grid-template-columns: 1fr; gap: 12px; }
  .bridge-center { flex-direction: row; padding: 8px 0; }
  .bridge-arrow-svg { transform: rotate(90deg); width: 30px; }

  .pipeline-flow { flex-direction: column; }
  .pipeline-arrow { transform: rotate(90deg); padding: 4px 0; }
  .pipeline-outcomes { grid-template-columns: 1fr; }
  .defense-layer { grid-template-columns: 1fr; }

  .founder-grid { grid-template-columns: 1fr; }
  .founder-col:first-child { border-right: none; border-bottom: 1px solid var(--border); }
  .exp-grid { grid-template-columns: 1fr; }
  .founder-header { flex-direction: column; align-items: flex-start; }
  .founder-cta { flex-direction: column; align-items: flex-start; }

  form.contactForm { grid-template-columns: 1fr; }
  form.contactForm .full { grid-column: span 1; }

  .footer-row { flex-direction: column; align-items: flex-start; gap: 12px; }

  .filter-bar .search-input { max-width: 100%; }
}

@media (max-width: 480px) {
  .stat-row { grid-template-columns: 1fr; }
  .cta-row { flex-direction: column; align-items: stretch; }
  .cta-row .btn { justify-content: center; }
}

/* ---------- Utilities ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.text-center { text-align: center; }

/* Print */
@media print {
  header, footer, .theme-toggle, .nav-toggle { display: none !important; }
  body { background: white; color: black; }
  .card, .panel, .pub-item { box-shadow: none; border: 1px solid #ccc; }
}