:root {
  --app-shell-bg: radial-gradient(circle at top, rgba(91, 140, 255, 0.08), transparent 28%), var(--wu-bg);
  --app-shell-gap: 20px;
  --app-sidebar-width: 248px;
  --app-sidebar-collapsed-width: 76px;
  --app-sidebar-mobile-width: min(86vw, 320px);
  --app-context-width: 360px;
  --app-radius-lg: 24px;
  --app-radius-md: 18px;
  --app-radius-sm: 12px;
  --app-shadow: 0 18px 45px rgba(7, 12, 20, 0.08);
  --app-border-subtle: color-mix(in srgb, var(--wu-border) 88%, transparent);
  --app-transition: 180ms ease;
  --app-font-ui: "IBM Plex Sans", "Segoe UI", sans-serif;
  --app-font-display: "Fraunces", "Georgia", serif;
  --app-font-mono: "JetBrains Mono", "SFMono-Regular", monospace;
}

* {
  box-sizing: border-box;
}

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

body.app-shell-body {
  margin: 0;
  min-height: 100vh;
  overflow: hidden;
  font-family: var(--app-font-ui);
  background: var(--app-shell-bg);
  color: var(--wu-text);
}

body.app-shell-body.has-open-sidebar-drawer {
  overflow: hidden;
}

.app-skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 200;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--wu-accent);
  color: var(--wu-accent-contrast);
}

.app-skip-link:focus {
  top: 16px;
}

.app-shell {
  --app-sidebar-track-width: var(--app-sidebar-width);
  position: relative;
  display: grid;
  grid-template-columns: var(--app-sidebar-track-width) minmax(0, 1fr);
  height: 100vh;
  min-height: 100vh;
  overflow: hidden;
}

.app-shell[data-sidebar-collapsed="true"],
.app-shell[data-sidebar-autohide="true"] {
  --app-sidebar-track-width: var(--app-sidebar-collapsed-width);
}

.app-sidebar-backdrop {
  display: none;
}

.app-sidebar {
  position: relative;
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: var(--app-sidebar-width);
  height: 100vh;
  min-height: 100vh;
  overflow: auto;
  padding: 24px 18px;
  background: color-mix(in srgb, var(--wu-nav-bg) 94%, transparent);
  border-right: 1px solid var(--app-border-subtle);
  backdrop-filter: blur(14px);
  transition: transform var(--app-transition), width var(--app-transition), padding var(--app-transition);
}

.app-shell[data-sidebar-collapsed="true"] .app-sidebar {
  width: var(--app-sidebar-collapsed-width);
  padding: 20px 10px;
}

.app-shell[data-sidebar-autohide="true"] .app-sidebar {
  width: var(--app-sidebar-width);
  transform: translateX(calc(-1 * (var(--app-sidebar-width) - var(--app-sidebar-collapsed-width))));
}

.app-shell[data-sidebar-autohide="true"] .app-sidebar:hover,
.app-shell[data-sidebar-autohide="true"] .app-sidebar:focus-within {
  transform: translateX(0);
}

.app-sidebar-controls {
  display: flex;
  justify-content: flex-end;
}

.app-sidebar-toggle {
  min-height: 44px;
  min-width: 44px;
  border-radius: 12px;
  border: 2px solid color-mix(in srgb, var(--wu-accent) 80%, black);
  background: var(--wu-accent);
  color: var(--wu-accent-contrast);
  font-size: 1.2rem;
  font-weight: 700;
  cursor: pointer;
}

.app-sidebar-mobile-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  border-radius: 12px;
  border: 2px solid color-mix(in srgb, var(--wu-accent) 80%, black);
  background: var(--wu-accent);
  color: var(--wu-accent-contrast);
  font-size: 1.15rem;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
  flex: 0 0 auto;
}

.app-brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.app-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--wu-accent), color-mix(in srgb, var(--wu-accent) 62%, white));
  color: var(--wu-accent-contrast);
  font-weight: 700;
}

.app-brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.app-brand-copy span {
  color: var(--wu-text-muted);
  font-size: 0.86rem;
}

.app-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.app-nav-link,
.app-auth-link {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  min-height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  color: var(--wu-nav-text);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background var(--app-transition), border-color var(--app-transition);
}

.app-nav-link::before {
  content: attr(data-short);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--wu-border) 82%, transparent);
  color: inherit;
  font-size: 0.8rem;
  font-weight: 700;
}

.app-nav-link-text {
  white-space: nowrap;
}

.app-nav-link:hover,
.app-auth-link:hover {
  background: var(--wu-nav-hover);
}

.app-nav-link.is-active {
  background: var(--wu-nav-active-bg);
  color: var(--wu-nav-active-text);
  border-color: color-mix(in srgb, var(--wu-nav-active-bg) 65%, var(--wu-border));
}

.app-sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
}

.app-sidebar-pref-toggle,
.app-theme-toggle {
  min-height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--wu-border);
  background: transparent;
  color: var(--wu-text);
  text-align: left;
  cursor: pointer;
}

.app-workspace {
  display: flex;
  flex-direction: column;
  gap: var(--app-shell-gap);
  padding: 24px;
  min-height: 100vh;
  height: 100vh;
  overflow: auto;
}

.app-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.app-header-minimal {
  min-height: 0;
  padding: 0;
  align-items: center;
}

.app-header-minimal .app-header-actions,
.app-header-minimal .app-header-minimal-spacer {
  min-width: 0;
}

.app-shell[data-page="editor"] .app-workspace {
  gap: 10px;
  overflow: hidden;
}

.app-shell[data-page="editor"] .app-content-frame {
  display: flex;
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
  height: auto;
  overflow: hidden;
}

.app-shell[data-page="editor"] .app-main {
  display: flex;
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
  height: auto;
  overflow: hidden;
}

.app-shell[data-page="editor"] .app-main > * {
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
}

.app-sidebar-toggle:focus-visible,
.app-sidebar-mobile-toggle:focus-visible,
.app-sidebar-pref-toggle:focus-visible,
.app-theme-toggle:focus-visible,
.app-nav-link:focus-visible,
.app-auth-link:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--wu-accent) 75%, white);
  outline-offset: 2px;
}

.app-shell[data-sidebar-collapsed="true"] .app-brand-copy,
.app-shell[data-sidebar-collapsed="true"] .app-nav-link-text,
.app-shell[data-sidebar-collapsed="true"] .app-sidebar-pref-toggle,
.app-shell[data-sidebar-collapsed="true"] .app-theme-toggle,
.app-shell[data-sidebar-collapsed="true"] .app-auth-link {
  display: none;
}

.app-shell[data-sidebar-collapsed="true"] .app-nav-link {
  justify-content: center;
  padding: 0;
}

.app-shell[data-sidebar-collapsed="true"] .app-brand-link {
  justify-content: center;
}

.app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-brand-copy,
.app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-nav-link-text,
.app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-sidebar-pref-toggle,
.app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-theme-toggle,
.app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-auth-link {
  display: none;
}

.app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-nav-link {
  justify-content: center;
  padding: 0;
}

.app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-brand-link {
  justify-content: center;
}

.app-eyebrow,
.section-kicker,
.hero-kicker {
  margin: 0 0 6px;
  color: var(--wu-text-muted);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.app-page-title,
.hero-title,
.surface-head h2,
.context-panel-header h2 {
  margin: 0;
  font-family: var(--app-font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.app-page-title {
  font-size: clamp(1.8rem, 2.2vw, 2.6rem);
}

.app-content-frame {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--app-shell-gap);
}

.app-content-frame .app-context-panel {
  display: none;
}

.app-content-frame.has-context {
  grid-template-columns: minmax(0, 1fr) minmax(300px, var(--app-context-width));
}

.app-content-frame.has-context .app-context-panel {
  display: block;
}

.app-main,
.app-context-panel,
.surface-card,
.hero-card,
.stat-card,
.empty-state,
.error-state,
.loading-state,
.research-card,
.project-chip {
  border: 1px solid var(--app-border-subtle);
  border-radius: var(--app-radius-md);
  background: color-mix(in srgb, var(--wu-bg-elevated) 96%, transparent);
  box-shadow: var(--app-shadow);
}

.page-stack {
  display: flex;
  flex-direction: column;
  gap: var(--app-shell-gap);
}

.hero-card,
.surface-card,
.app-context-panel {
  padding: 22px;
}

.hero-card {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--wu-accent) 12%, transparent), transparent 50%),
    color-mix(in srgb, var(--wu-bg-elevated) 96%, transparent);
}

.hero-copy {
  max-width: 64ch;
  margin: 10px 0 0;
  color: var(--wu-text-muted);
  line-height: 1.55;
}

.hero-meta {
  min-width: 180px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
}

.stats-grid,
.split-grid {
  display: grid;
  gap: var(--app-shell-gap);
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.split-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stat-card {
  padding: 18px;
}

.stat-card strong {
  display: block;
  font-size: 1.6rem;
  margin-top: 10px;
}

.surface-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-link,
.card-link {
  color: var(--wu-accent);
  text-decoration: none;
}

.card-stack,
.milestone-stack,
.ranked-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.research-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.app-tablist {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
}

.app-tab {
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--wu-border);
  background: transparent;
  color: var(--wu-text);
  cursor: pointer;
}

.app-tab[aria-selected="true"] {
  background: var(--wu-nav-active-bg);
  color: var(--wu-nav-active-text);
  border-color: color-mix(in srgb, var(--wu-nav-active-text) 22%, var(--wu-border));
}

.research-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.research-filters input {
  min-height: 40px;
  min-width: 180px;
  padding: 0 12px;
  border-radius: 12px;
  border: 1px solid var(--wu-border);
  background: var(--wu-bg);
  color: var(--wu-text);
}

.app-button-secondary,
.context-close-button {
  min-height: 40px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--wu-border);
  background: transparent;
  color: var(--wu-text);
  cursor: pointer;
}

.research-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
}

.research-card.is-selected {
  border-color: color-mix(in srgb, var(--wu-accent) 45%, var(--wu-border));
  box-shadow: 0 18px 45px rgba(7, 12, 20, 0.14);
}

.research-card-header,
.research-card-meta,
.chip-row,
.detail-chip-row,
.detail-metadata {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.research-card-title {
  margin: 0;
  font-size: 1rem;
}

.research-card-body,
.research-card-meta,
.detail-copy,
.empty-state p,
.error-state p,
.loading-state p {
  color: var(--wu-text-muted);
  line-height: 1.5;
}

.meta-pill,
.tag-chip,
.project-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--wu-border);
  font-size: 0.82rem;
}

.project-chip {
  background: color-mix(in srgb, var(--wu-bg) 90%, transparent);
}

.bar-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 52px;
  gap: 10px;
  align-items: center;
}

.bar-track {
  height: 12px;
  border-radius: 999px;
  background: var(--wu-surface-inset);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--wu-accent), color-mix(in srgb, var(--wu-accent) 52%, white));
}

.app-context-panel {
  position: sticky;
  top: 24px;
  max-height: calc(100vh - 48px);
  overflow: auto;
}

.context-panel-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.context-panel-header .section-kicker {
  color: var(--wu-accent);
}

.detail-section + .detail-section {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--wu-border);
}

.detail-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 10px;
}

.detail-summary-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--app-border-subtle);
  border-radius: 14px;
  background: color-mix(in srgb, var(--wu-accent) 6%, var(--wu-bg-elevated));
}

.detail-summary-count {
  font-size: 1.35rem;
  font-weight: 700;
}

.detail-summary-label {
  color: var(--wu-text-muted);
  text-transform: capitalize;
}

.detail-nav-card {
  cursor: pointer;
}

.detail-nav-card .research-card {
  border-style: solid;
}

.detail-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.relationship-group-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.relationship-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.relationship-group-title {
  margin: 0;
  font-size: 0.92rem;
}

.detail-list-item {
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--wu-surface-inset);
}

.relationship-item-copy {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.relationship-item-meta {
  color: var(--wu-text-muted);
  font-size: 0.82rem;
}

.empty-state,
.error-state,
.loading-state {
  padding: 18px;
}

.surface-note {
  padding: 14px 16px;
  border-radius: var(--app-radius-sm);
  border: 1px dashed var(--wu-border);
  color: var(--wu-text-muted);
}

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

@media (max-width: 1024px) {
  body.app-shell-body {
    overflow: auto;
  }

  .app-shell {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 140;
    width: var(--app-sidebar-mobile-width);
    height: 100vh;
    border-right: 1px solid var(--app-border-subtle);
    transform: translateX(calc(-1 * var(--app-sidebar-mobile-width) - 12px));
    box-shadow: 0 18px 46px rgba(7, 12, 20, 0.24);
  }

  .app-shell[data-sidebar-mobile-open="true"] .app-sidebar {
    transform: translateX(0);
  }

  .app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-brand-copy,
  .app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-nav-link-text,
  .app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-sidebar-pref-toggle,
  .app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-theme-toggle,
  .app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-auth-link {
    display: flex;
  }

  .app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-nav-link {
    justify-content: flex-start;
    padding: 0 14px;
  }

  .app-shell[data-sidebar-autohide="true"] .app-sidebar:not(:hover):not(:focus-within) .app-brand-link {
    justify-content: flex-start;
  }

  .app-shell[data-sidebar-mobile-open="true"] .app-sidebar-backdrop {
    position: fixed;
    inset: 0;
    display: block;
    z-index: 120;
    border: 0;
    padding: 0;
    background: rgba(9, 12, 18, 0.45);
    cursor: pointer;
  }

  .app-sidebar-mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .app-sidebar-controls {
    justify-content: flex-start;
  }

  .app-shell[data-sidebar-collapsed="true"] .app-brand-copy,
  .app-shell[data-sidebar-collapsed="true"] .app-nav-link-text,
  .app-shell[data-sidebar-collapsed="true"] .app-sidebar-pref-toggle,
  .app-shell[data-sidebar-collapsed="true"] .app-theme-toggle,
  .app-shell[data-sidebar-collapsed="true"] .app-auth-link,
  .app-shell[data-sidebar-autohide="true"] .app-brand-copy,
  .app-shell[data-sidebar-autohide="true"] .app-nav-link-text,
  .app-shell[data-sidebar-autohide="true"] .app-sidebar-pref-toggle,
  .app-shell[data-sidebar-autohide="true"] .app-theme-toggle,
  .app-shell[data-sidebar-autohide="true"] .app-auth-link,
  .app-brand-copy,
  .app-nav-link-text,
  .app-sidebar-pref-toggle,
  .app-theme-toggle,
  .app-auth-link {
    display: flex;
  }

  .app-shell[data-sidebar-collapsed="true"] .app-nav-link,
  .app-shell[data-sidebar-autohide="true"] .app-nav-link,
  .app-nav-link {
    justify-content: flex-start;
    padding: 0 14px;
  }

  .app-shell[data-sidebar-collapsed="true"] .app-brand-link,
  .app-shell[data-sidebar-autohide="true"] .app-brand-link,
  .app-brand-link {
    justify-content: flex-start;
  }

  .app-workspace {
    min-height: auto;
    height: auto;
    padding: 18px;
    overflow: visible;
  }

  .app-header {
    align-items: center;
  }

  .app-content-frame {
    display: block;
  }

  .app-content-frame.has-context .app-context-panel {
    display: block;
    position: static;
    max-height: none;
  }
}

@media (max-width: 900px) {
  .stats-grid,
  .split-grid {
    grid-template-columns: 1fr;
  }

  .hero-card {
    flex-direction: column;
  }
}