@import url('../visualisations/styles/shared-dark.css');

:root {
  --project-nav-height: 56px;
  --reader-sidebar-width: 330px;
  --home-context-width: 320px;
  --content-max: 860px;
  --df-accent-soft-strong: rgba(165, 28, 48, 0.22);
  --background-app: linear-gradient(180deg, #1c1f26 0%, #171a21 100%);
  --background-panel: #242830;
  --background-panel-soft: #1f232b;
  --background-elevated: #2b3039;
  --background-hover: rgba(241, 245, 249, 0.08);
  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-stronger: rgba(148, 163, 184, 0.26);
  --text-heading-site: var(--df-slate-50);
  --text-body-site: var(--df-slate-300);
  --text-secondary-site: var(--df-slate-400);
  --text-label-site: var(--df-slate-500);
  --text-inverse-site: var(--df-slate-950);
  --df-shadow-light: 0 1px 2px rgba(0, 0, 0, 0.22);
  --df-shadow-card: 0 14px 36px rgba(0, 0, 0, 0.28);
  --df-shadow-panel: 0 24px 60px rgba(0, 0, 0, 0.34);
  --df-radius-lg: 16px;
  --df-radius-xl: 22px;
}

html[data-theme="light"] {
  --background-app: linear-gradient(180deg, #f5f7fb 0%, #eef2f6 100%);
  --background-panel: #ffffff;
  --background-panel-soft: #f8fafc;
  --background-elevated: #f2f5f8;
  --background-hover: rgba(15, 23, 42, 0.04);
  --border-subtle: rgba(148, 163, 184, 0.28);
  --border-stronger: rgba(100, 116, 139, 0.38);
  --text-heading-site: var(--df-slate-900);
  --text-body-site: var(--df-slate-700);
  --text-secondary-site: var(--df-slate-600);
  --text-label-site: var(--df-slate-500);
  --text-inverse-site: var(--df-slate-50);
  --df-shadow-light: 0 1px 2px rgba(15, 23, 42, 0.06);
  --df-shadow-card: 0 16px 36px rgba(15, 23, 42, 0.08);
  --df-shadow-panel: 0 24px 60px rgba(15, 23, 42, 0.12);
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--background-app);
  color: var(--text-body-site);
  font-family: IBMSans, Geist, sans-serif;
}

body.has-project-nav {
  padding-top: var(--project-nav-height);
}

html.embed-mode body,
html.embed-mode body.has-project-nav {
  padding-top: 0 !important;
}

html.embed-mode .project-nav {
  display: none !important;
}

.project-nav-theme,
#themeToggle,
.theme-float-btn,
label[for="toggle-theme"],
#toggle-theme {
  display: none !important;
}

a {
  color: inherit;
}

.project-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1200;
  height: var(--project-nav-height);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 18px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(28, 31, 38, 0.94);
  backdrop-filter: blur(18px);
}

html[data-theme="light"] .project-nav {
  background: rgba(248, 250, 252, 0.94);
}

.project-nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--text-heading-site);
  text-decoration: none;
  max-width: 54vw;
}

.project-nav-brand-icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary-site);
  flex-shrink: 0;
}

.project-nav-brand-icon svg {
  display: block;
  width: 16px;
  height: 16px;
}

.project-nav-brand:hover .project-nav-brand-icon,
.project-nav-brand:focus-visible .project-nav-brand-icon {
  color: var(--text-heading-site);
}

.project-nav-brand-text {
  min-width: 0;
}

.project-nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.project-nav-link,
.nav-dropdown-item {
  font-size: 13px;
  font-weight: 400;
}

.project-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 32px;
  padding: 0 12px;
  border-radius: var(--df-radius-badge);
  color: var(--text-secondary-site);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

button.project-nav-link {
  appearance: none;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
}

.project-nav-link:hover {
  background: var(--background-hover);
  color: var(--text-heading-site);
}

.project-nav-link.active {
  background: transparent;
  border-color: var(--df-accent);
  color: var(--df-accent-active-text);
  font-weight: 500;
}

.project-nav-dropdown {
  position: relative;
}

.project-nav-menu {
  display: none;
  position: absolute;
  top: calc(100% - 1px);
  right: 0;
  min-width: 280px;
  padding: 6px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--df-radius-card);
  background: var(--background-panel);
  box-shadow: var(--df-shadow-panel);
  max-height: min(70vh, 420px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  -webkit-overflow-scrolling: touch;
  z-index: 1400;
}

.project-nav-dropdown.open .project-nav-menu {
  display: block;
}

.nav-dropdown-item {
  display: block;
  padding: 10px 12px;
  border-radius: var(--df-radius-badge);
  color: var(--text-secondary-site);
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.nav-dropdown-item:hover {
  transform: translateX(2px);
  background: var(--background-hover);
  color: var(--text-heading-site);
}

.nav-dropdown-item.active {
  background: transparent;
  color: var(--df-accent-active-text);
  border: 1px solid var(--df-accent);
  font-weight: 500;
}

.project-nav-theme {
  margin-left: 8px;
  width: 32px;
  height: 32px;
  border-radius: var(--df-radius-badge);
  border: 1px solid var(--border-subtle);
  background: var(--background-panel-soft);
  color: var(--text-secondary-site);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--df-shadow-light);
}

.project-nav-theme:hover {
  color: var(--text-heading-site);
  border-color: var(--border-stronger);
}

.theme-icon-sun {
  display: none;
}

html[data-theme="light"] .theme-icon-sun {
  display: inline;
}

html[data-theme="light"] .theme-icon-moon {
  display: none;
}

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 14px;
  border-radius: var(--df-radius-badge);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.button-disabled {
  opacity: 0.7;
  cursor: default;
  pointer-events: none;
}

.button-primary {
  background: var(--df-accent);
  border: 1px solid var(--df-accent);
  color: white;
}

.button-primary:hover {
  transform: translateY(-1px);
  background: var(--df-accent-secondary);
  border-color: var(--df-accent-secondary);
}

.button-secondary {
  background: transparent;
  border: 1px solid var(--border-stronger);
  color: var(--text-heading-site);
}

.button-secondary:hover {
  transform: translateY(-1px);
  background: var(--background-hover);
}

.project-home-main {
  padding: 20px;
}

.home-shell {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  gap: 0;
  min-height: calc(100vh - var(--project-nav-height) - 40px);
  border-top: 1px solid var(--border-subtle);
}

.home-rail,
.reader-sidebar {
  border-right: 1px solid var(--border-subtle);
}

.home-rail,
.reader-sidebar {
  padding: 28px 22px;
}

.site-logo {
  display: block;
  width: 188px;
  height: auto;
  margin-bottom: 28px;
}

.site-logo-inline {
  width: 170px;
  margin: 0;
}

.home-project-leads-label {
  margin: 16px 0 8px;
}

.home-project-leads {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
}

.sidebar-credit-home {
  margin-top: 8px;
}

.home-project-lead-link {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: var(--df-radius-badge);
  background: transparent;
  color: var(--text-heading-site);
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.home-project-lead-link:visited {
  color: var(--text-heading-site);
}

.home-project-lead-link:hover,
.home-project-lead-link:focus-visible,
.home-project-lead-link:active {
  background: transparent;
  border-color: var(--df-accent);
  color: var(--text-heading-site);
  box-shadow: 0 0 0 1px rgba(165, 28, 48, 0.28);
}

.sidebar-classification-link {
  display: inline-block;
  width: fit-content;
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease, opacity 0.15s ease;
}

.sidebar-classification-link:visited {
  color: inherit;
}

.sidebar-classification-link:hover,
.sidebar-classification-link:focus-visible {
  color: var(--text-heading-site);
  opacity: 1;
}

.home-rail-kicker,
.reader-sidebar-kicker,
.home-rail-section-label,
.reader-sidebar-section-label,
.section-heading-kicker,
.pair-card-eyebrow,
.pair-visual-eyebrow,
.article-header-kicker,
.article-hero-eyebrow,
.article-tail-eyebrow {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-label-site);
}

.home-rail-section-label,
.reader-sidebar-section-label {
  margin: 22px 0 10px;
}

.home-rail-list,
.reader-sidebar-section,
.reader-sidebar-branding-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.home-rail-list-item,
.reader-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--df-radius-badge);
  border: 1px solid transparent;
  text-decoration: none;
  color: var(--text-secondary-site);
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.home-rail-list-item:hover,
.reader-list-item:hover {
  transform: translateX(2px);
  background: var(--background-hover);
  color: var(--text-heading-site);
}

.home-rail-list-item.active,
.reader-list-item.active {
  background: transparent;
  border-color: var(--df-accent);
  color: var(--df-accent-active-text);
  font-weight: 500;
}

.home-rail-list-item-placeholder {
  opacity: 0.78;
}

.home-rail-dot,
.reader-list-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--df-accent);
  flex-shrink: 0;
}

.home-rail-number,
.reader-list-number {
  min-width: 24px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-label-site);
}

.home-rail-branding,
.reader-sidebar-branding {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.home-rail-branding-text,
.reader-sidebar-branding-text {
  font-size: 13px;
  line-height: 1.4;
  color: var(--text-secondary-site);
}

.home-main {
  padding: 24px 24px 36px;
}

.home-main-panel {
  padding: 4px 0 18px;
  margin-bottom: 10px;
}

.home-main-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin: 10px 0 18px;
}

.home-main-head h2,
.section-heading-row h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 300;
  color: var(--text-heading-site);
}

.home-main-actions,
.pair-card-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.home-main-summary,
.section-heading-text,
.pair-card-text,
.pair-visual-text,
.reader-sidebar-text,
.article-hero-text,
.context-card-text {
  color: var(--text-secondary-site);
}

.home-main-summary + .home-main-summary {
  margin-top: 12px;
}

.section-heading-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 10px;
}

.section-heading-text {
  max-width: 360px;
}

.pair-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
}

.pair-card {
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100%;
  background: var(--background-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--df-radius-card);
  box-shadow: none;
  overflow: hidden;
  padding: 0;
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.pair-card-link:hover {
  border-color: var(--border-stronger);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
  transform: translateY(-2px);
}

.pair-card-preview {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  margin: 0;
  border-bottom: 1px solid var(--border-subtle);
  background: transparent;
}

.pair-card-preview-frame {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  pointer-events: none;
  transform-origin: center center;
  transform: translate(calc(-50% + var(--preview-shift-x, 0%)), calc(-50% + var(--preview-shift-y, 0%))) scale(var(--preview-scale, 1));
}

.pair-card-preview-copy {
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at top right, rgba(165, 28, 48, 0.08), transparent 42%),
    linear-gradient(180deg, rgba(248, 250, 252, 0.96) 0%, rgba(241, 245, 249, 1) 100%);
}

.pair-card-preview-copy::before,
.pair-card-preview-copy::after {
  display: none;
}

.pair-card-preview-copy-inner {
  position: relative;
  z-index: 3;
  display: grid;
  gap: 6px;
  text-align: center;
  padding: 0 24px;
}

.pair-card-preview-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-label-site);
}

.pair-card-preview-title {
  font-size: 22px;
  line-height: 1.12;
  font-weight: 600;
  color: var(--text-heading-site);
}

.pair-card-top {
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 12px;
  padding: 16px 18px 18px;
}

.pair-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.pair-card-title-block {
  display: grid;
  align-content: start;
  gap: 6px;
  min-height: 90px;
}

.pair-card-title-block h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-heading-site);
}

.pair-card-byline {
  font-size: 12px;
  line-height: 1.4;
  color: var(--text-label-site);
}

.pair-card-meta {
  padding: 6px 8px;
  border-radius: var(--df-radius-badge);
  border: 1px solid var(--border-subtle);
  color: var(--text-label-site);
  font-size: 12px;
  white-space: nowrap;
}

.pair-card-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  min-height: 126px;
}

.reader-shell {
  display: grid;
  grid-template-columns: var(--reader-sidebar-width) minmax(0, 1fr);
  min-height: calc(100vh - var(--project-nav-height));
}

.reader-sidebar-inner {
  position: sticky;
  top: calc(var(--project-nav-height) + 20px);
  max-height: calc(100vh - var(--project-nav-height) - 40px);
  overflow-y: auto;
}

.reader-sidebar-text {
  margin: 18px 0;
}

.reader-sidebar-meta {
  padding: 14px 0 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.reader-meta-label {
  margin-bottom: 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-label-site);
}

.reader-meta-value {
  color: var(--text-heading-site);
  font-weight: 500;
}

.reader-sidebar-section + .reader-sidebar-section {
  margin-top: 22px;
}

.reader-main {
  padding: 28px 28px 54px;
}

.reader-article {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 12px 0 40px;
}

.article-header h1 {
  margin: 10px 0 12px;
  font-size: 48px;
  font-weight: 600;
  line-height: 1.02;
  color: var(--text-heading-site);
}

.article-byline {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-heading-site);
}

.article-byline a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.article-byline a:hover {
  border-bottom-color: currentColor;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0 18px;
  color: var(--text-label-site);
  font-size: 13px;
}

.article-excerpt {
  margin: 0 0 24px;
  max-width: 58ch;
  font-size: 22px;
  line-height: 1.4;
  color: var(--text-secondary-site);
  font-weight: 300;
}

.article-hero-embed,
.article-tail-card {
  margin: 28px 0;
  padding: 20px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--df-radius-lg);
}

.article-hero-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.article-hero-header h3,
.article-tail-card h3 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  color: var(--text-heading-site);
}

.article-hero-frame {
  overflow: hidden;
  border-radius: var(--df-radius-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--df-shadow-light);
}

.article-hero-frame iframe {
  display: block;
  width: 100%;
  height: 520px;
  border: 0;
  background: var(--df-slate-950);
}

.article-body h2,
.article-body h3 {
  margin: 28px 0 10px;
  color: var(--text-heading-site);
}

.article-body h2 {
  font-size: 28px;
  font-weight: 400;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
}

.article-body p,
.article-body li {
  font-size: 18px;
  line-height: 1.6;
  font-weight: 400;
  color: var(--text-body-site);
}

.article-body p + p {
  margin-top: 14px;
}

.article-body ul {
  margin: 12px 0 18px 20px;
}

.article-divider {
  margin: 24px 0;
  border: 0;
  border-top: 1px solid var(--border-subtle);
}

.article-tail-card p {
  margin: 10px 0 16px;
}

.sidebar-page-link {
  display: inline-block;
  text-decoration: none;
}

.sidebar-page-link:hover,
.sidebar-page-link:focus-visible {
  color: var(--text-heading-site);
}

.page-reader-page .reader-article {
  padding-top: 10px;
}

.has-project-nav .sidebar-left,
.has-project-nav .main-viz,
.has-project-nav .detail-panel {
  top: var(--project-nav-height);
}

.has-project-nav .main-content {
  padding-top: calc(48px + var(--project-nav-height));
}

/* Home page hero embed (topic network) */
.home-hero-embed {
  margin: 28px 0 8px;
  border: 1px solid var(--border-subtle, #e2e8f0);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface-raised, #f8fafc);
}
.home-hero-frame {
  width: 100%;
  height: 480px;
  border: none;
  display: block;
}
.home-hero-caption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text-secondary, #64748b);
  border-top: 1px solid var(--border-subtle, #e2e8f0);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.home-hero-caption a {
  font-weight: 500;
  color: var(--df-accent);
  text-decoration: none;
}

@media (max-width: 1240px) {
  .home-shell {
    grid-template-columns: 330px minmax(0, 1fr);
  }
}

@media (max-width: 1100px) {
  .pair-grid,
  .reader-shell,
  .home-shell {
    grid-template-columns: 1fr;
  }

  .home-rail,
  .reader-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--border-subtle);
  }

  .reader-sidebar-inner {
    position: static;
  }
}

@media (max-width: 780px) {
  .project-nav {
    padding: 0 12px;
  }

  .project-nav-brand {
    max-width: 40vw;
    font-size: 12px;
  }

  .project-nav-link {
    padding: 0 8px;
    font-size: 12px;
  }

  .project-home-main,
  .reader-main,
  .home-main {
    padding: 16px;
  }

  .home-rail,
  .reader-sidebar {
    padding: 20px 16px;
  }

  .home-main-panel,
  .article-hero-embed,
  .article-tail-card {
    padding: 18px;
    border-radius: 12px;
  }

  .pair-card-top {
    padding: 16px;
    grid-template-rows: auto auto 1fr;
  }

  .pair-card-preview {
    margin: 0;
  }

  .reader-article {
    padding: 0;
  }

  .article-header h1 {
    font-size: 34px;
  }

  .article-excerpt {
    font-size: 18px;
  }

  .article-body p,
  .article-body li {
    font-size: 17px;
  }

  .home-main-head,
  .section-heading-row,
  .article-hero-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .pair-grid {
    grid-template-columns: 1fr;
  }

  .article-hero-frame iframe {
    height: 360px;
  }

  .site-logo-inline {
    width: 150px;
  }

  .home-hero-frame {
    height: 360px;
  }
}

@media (max-width: 480px) {
  .project-nav-brand {
    max-width: 36vw;
    font-size: 11px;
  }

  .project-nav-link {
    padding: 0 6px;
    font-size: 11px;
  }

  .project-nav-menu {
    min-width: 0;
    width: calc(100vw - 24px);
    right: -6px;
  }

  .project-home-main,
  .reader-main,
  .home-main {
    padding: 12px;
  }

  .home-rail,
  .reader-sidebar {
    padding: 16px 12px;
  }

  .article-header h1 {
    font-size: 26px;
  }

  .article-byline {
    font-size: 16px;
  }

  .article-excerpt {
    font-size: 16px;
  }

  .home-main-head h2,
  .section-heading-row h2 {
    font-size: 20px;
  }

  .pair-card-title-block h2 {
    font-size: 16px;
  }

  .pair-card-title-block {
    min-height: 60px;
  }

  .pair-card-text {
    font-size: 13px;
    min-height: 80px;
  }

  .pair-card-top {
    padding: 12px;
  }

  .home-hero-frame {
    height: 280px;
  }

  .article-hero-frame iframe {
    height: 280px;
  }

  .article-hero-embed,
  .article-tail-card {
    padding: 14px;
    border-radius: 10px;
  }

  .article-hero-header h3,
  .article-tail-card h3 {
    font-size: 18px;
  }

  .article-body h2 {
    font-size: 22px;
  }

  .article-body p,
  .article-body li {
    font-size: 16px;
    font-weight: 400;
  }

  .site-logo {
    width: 150px;
  }
}