/* ============================================================
   Harvard Law School — Shared Design System (light default)
   Adapted from AI Through Dragonfly Eyes shared.css
   Light is the default; dark mode opts in via html[data-theme="dark"].
   ============================================================ */

/* IBM Plex Sans — self-hosted via local woff2 (see fonts.css). */
@font-face {
  font-family: 'IBM Plex Sans';
  src: url('ibm-plex-sans.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('inter.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ---- CSS Custom Properties ---- */
:root {
  /* ══ Canonical Dragonfly --df- Tokens ══ */

  /* ── Neutrals (Tailwind Slate scale) ── */
  --df-slate-950: #0f172a;
  --df-slate-900: #0f172a;
  --df-slate-800: #1e293b;
  --df-slate-700: #334155;
  --df-slate-600: #475569;
  --df-slate-500: #64748b;
  --df-slate-400: #94a3b8;
  --df-slate-300: #cbd5e1;
  --df-slate-200: #e2e8f0;
  --df-slate-100: #f1f5f9;
  --df-slate-50:  #f8f9fb;
  --df-white:     #fff;

  /* ── Accent (Harvard Crimson override) ── */
  --df-accent: #A51C30;
  --df-accent-dim: rgba(165, 28, 48, 0.08);
  --df-accent-secondary: #8F1728;
  --df-accent-soft: rgba(165, 28, 48, 0.14);
  --df-accent-active-text: #7a1e2c;

  /* ── Curated lens palette (shared across all essay visualisations) ──────
     ONE ordered, sanctioned set so the whole suite reads as one family.
     Crimson (--df-accent) is the brand SPINE/FOCAL only — never just one
     category among peers. Categories draw from this fixed order:
       1 indigo · 2 teal · 3 gold · 4 plum   (the curated 5 with crimson)
       5 orange · 6 sky · 7 green · 8 cobalt  (extend in this order if needed)
     Per hue, three roles:
       --df-lens-X       vivid fill/stroke hue (theme-aware: brightens on dark)
       --df-lens-X-text  label text in that hue (AA on the current surface)
     Editorial technique: fill = hue at low alpha, stroke = full hue,
       label = the -text token. (Matches topic-network.) */
  --df-lens-indigo:  #446BB7;  --df-lens-indigo-text:  #3A5BA0;
  --df-lens-teal:    #0BAEA3;  --df-lens-teal-text:    #07756E;
  --df-lens-gold:    #EFD038;  --df-lens-gold-text:    #8A6D00;
  --df-lens-plum:    #92448A;  --df-lens-plum-text:    #7A3873;
  --df-lens-orange:  #FF9413;  --df-lens-orange-text:  #B45309;
  --df-lens-sky:     #1B99D6;  --df-lens-sky-text:     #0F6F9E;
  --df-lens-green:   #0ABF67;  --df-lens-green-text:   #0A6B42;
  --df-lens-cobalt:  #1575BF;  --df-lens-cobalt-text:  #0F5D99;
  /* crimson-as-spine label colour (use --df-accent for fills/strokes) */
  --df-lens-crimson-text: #8a1626;

  /* ── Typography ── */
  --df-font-primary:   'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --df-font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --df-text-h1:    32px;
  --df-text-h2:    22px;
  --df-text-h3:    17px;
  --df-text-h4:    15px;
  --df-text-base:  15px;
  --df-text-sm:    13px;
  --df-text-xs:    12px;
  --df-text-xxs:   11px;
  --df-text-label-size: 10.5px;
  --df-text-micro: 10px;
  --df-weight-normal: 400;
  --df-weight-medium: 500;
  --df-weight-semi:   600;
  --df-weight-bold:   700;
  --df-leading-base:    1.7;
  --df-leading-tight:   1.3;
  --df-leading-snug:    1.5;
  --df-leading-sidebar: 1.45;
  --df-leading-relaxed: 1.6;
  --df-leading-compact: 1.4;
  --df-tracking-label:   2.5px;
  --df-tracking-section: 2px;
  --df-tracking-heading: -0.02em;
  --df-tracking-wide:    0.5px;
  --df-tracking-wider:   0.08em;

  /* ── Spacing & Layout ── */
  --df-sidebar-width:       260px;
  --df-sidebar-right-width: 240px;
  --df-content-max-width:   768px;
  --df-detail-panel-width:  380px;
  --df-section-gap:    52px;
  --df-page-padding:   48px;
  --df-page-padding-x: 56px;
  --df-card-padding:   20px;

  /* ── Border Radii ── */
  --df-radius-card:  10px;
  --df-radius-md:    8px;
  --df-radius-sm:    6px;
  --df-radius-badge: 4px;
  --df-radius-xs:    3px;

  /* ── Shadows ── */
  --df-shadow-light:   0 1px 3px rgba(0, 0, 0, 0.08);
  --df-shadow-card:    0 2px 8px rgba(0, 0, 0, 0.04);
  --df-shadow-tooltip: 0 4px 12px rgba(0, 0, 0, 0.08);
  --df-shadow-panel:   0 4px 16px rgba(0, 0, 0, 0.08);
  --df-shadow-panel-left: -4px 0 20px rgba(0, 0, 0, 0.06);

  /* ── Z-Index ── */
  --df-z-sidebar: 100;
  --df-z-detail:  150;
  --df-z-tooltip: 160;
  --df-z-toggle:  200;

  /* ── Transitions ── */
  --df-transition-fast:     0.15s ease;
  --df-transition-standard: 0.2s ease;
  --df-transition-sidebar:  0.3s ease;

  /* ── Semantic Text ── */
  --df-text-heading:   var(--df-slate-950);
  --df-text:           var(--df-slate-800);
  --df-text-secondary: var(--df-slate-600);
  --df-text-muted:     var(--df-slate-500);
  --df-text-label:     var(--df-slate-700);

  /* ── Semantic Surfaces ── */
  --df-bg:       var(--df-white);
  --df-bg-panel: var(--df-slate-50);
  --df-bg-hover: var(--df-slate-100);

  /* ── Semantic Borders ── */
  --df-border:       var(--df-slate-200);
  --df-border-light: var(--df-slate-300);

  /* ══ Backward Compatibility Aliases ══ */
  --slate-50:  var(--df-slate-50);
  --slate-100: var(--df-slate-100);
  --slate-200: var(--df-slate-200);
  --slate-300: var(--df-slate-300);
  --slate-400: var(--df-slate-400);
  --slate-500: var(--df-slate-500);
  --slate-600: var(--df-slate-600);
  --slate-700: var(--df-slate-700);
  --slate-800: var(--df-slate-800);
  --slate-900: var(--df-slate-900);
  --slate-950: var(--df-slate-950);
  --dragonfly-dark-grey: #404041;
  --dragonfly-gunmetal: #26272e;
  --text-heading: var(--df-text-heading);
  --text-body: var(--df-text);
  --text-secondary: var(--df-text-secondary);
  --text-muted: var(--df-text-muted);
  --text-label: var(--df-text-label);
  --border: var(--df-border);
  --border-strong: var(--df-border-light);
  --surface: var(--df-bg);
  --surface-raised: var(--df-bg-panel);
  --surface-dark: var(--df-bg-hover);
  --accent-blue: var(--df-accent);
  --accent-blue-dim: var(--df-accent-dim);
  --shadow-sm: var(--df-shadow-light);
  --shadow-subtle: var(--df-shadow-card);
  --shadow-md: var(--df-shadow-tooltip);
  --shadow-lg: var(--df-shadow-panel);
  --shadow-xl: var(--df-shadow-panel);
  --radius-sm: var(--df-radius-sm);
  --radius-md: var(--df-radius-card);
  --radius-lg: 16px;

  /* Transitions */
  --ease-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* Layout */
  --sidebar-width: 280px;
  --detail-width: var(--df-detail-panel-width);
  --sidebar-surface: #ffffff;
  --sidebar-border: rgba(148, 163, 184, 0.28);
}

/* ---- Dark Theme Overrides ---- */
html[data-theme="dark"] {
  --df-bg: #1c1f26;
  --df-bg-panel: #242830;
  --df-bg-hover: rgba(241, 245, 249, 0.08);
  --df-accent: #E55C73;          /* lifted for WCAG AA on dark slate */
  --df-accent-secondary: #C8485E;
  --df-accent-dim: rgba(229, 92, 115, 0.12);
  --df-accent-soft: rgba(229, 92, 115, 0.20);
  --df-accent-active-text: #f0a5b2;

  /* Lens palette lifted for the dark canvas — fill/stroke hues brighten so
     they stay vivid on #1c1f26/#242830; -text tokens flip to the same bright
     value (all ≥4.5:1 on dark panels, WCAG AA). Crimson handled above. */
  --df-lens-indigo:  #7C97CB;  --df-lens-indigo-text:  #7C97CB;
  --df-lens-teal:    #2EC6BA;  --df-lens-teal-text:    #2EC6BA;
  --df-lens-gold:    #EFD038;  --df-lens-gold-text:    #EFD038;
  --df-lens-plum:    #C383BC;  --df-lens-plum-text:    #C383BC;
  --df-lens-orange:  #FF9413;  --df-lens-orange-text:  #FF9413;
  --df-lens-sky:     #34A9E0;  --df-lens-sky-text:     #34A9E0;
  --df-lens-green:   #1FC97A;  --df-lens-green-text:   #1FC97A;
  --df-lens-cobalt:  #409DE5;  --df-lens-cobalt-text:  #409DE5;
  --df-lens-crimson-text: #E55C73;
  --df-text-heading: var(--df-slate-50);
  --df-text: var(--df-slate-300);
  --df-text-secondary: var(--df-slate-400);
  --df-text-muted: var(--df-slate-500);
  --df-text-label: var(--df-slate-500);
  --df-border: rgba(148, 163, 184, 0.14);
  --df-border-light: rgba(148, 163, 184, 0.26);
  --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-tooltip: 0 4px 12px rgba(0, 0, 0, 0.32);
  --df-shadow-panel: 0 24px 60px rgba(0, 0, 0, 0.34);

  --sidebar-surface: #242830;
  --sidebar-border: rgba(148, 163, 184, 0.14);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ---- Base Typography ---- */
html { scroll-behavior: smooth; }

body {
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#themeToggle,
.theme-float-btn,
#toggle-theme {
  display: none !important;
}

h1, h2, h3, h4 { color: var(--text-heading); line-height: 1.3; }

h1 { font-size: 32px; font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: 22px; font-weight: 700; }
h3 { font-size: 17px; font-weight: 600; }
h4 { font-size: 15px; font-weight: 600; }

p { margin-bottom: 14px; color: var(--text-body); }
strong { font-weight: 600; color: var(--text-heading); }

/* ---- Links ---- */
a { color: var(--slate-600); text-decoration: none; transition: color var(--duration-fast) var(--ease-out); }
a:hover { color: var(--text-heading); }


/* ============================================================
   LAYOUT SYSTEM
   ============================================================ */

/* ---- Left Sidebar (fixed, always visible) ---- */
.sidebar-left {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-surface);
  border-right: 1px solid var(--sidebar-border);
  padding: 32px 24px 24px;
  overflow-y: auto;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
}

/* ---- Main Visualization Area (fixed, for SVG pages) ---- */
.main-viz {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  bottom: 0;
  overflow: hidden;
  transition: right 300ms var(--ease-out);
}

/* When detail panel is open, shrink main viz */
.main-viz.detail-open {
  right: var(--detail-width);
}

/* ---- Main Content Area (scrollable, for content pages) ---- */
.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  padding: 48px 56px 80px;
  transition: margin-right 300ms var(--ease-out);
}

.main-content.detail-open {
  margin-right: var(--detail-width);
}

.content-inner {
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
}

/* ---- Detail Panel (slides in from right) ---- */
.detail-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: var(--detail-width);
  background: var(--surface);
  border-left: 1px solid var(--border);
  z-index: 500;
  overflow-y: auto;
  transform: translateX(100%);
  opacity: 0;
  transition: transform var(--duration-slow) var(--ease-out),
              opacity var(--duration-normal) var(--ease-out);
}

.detail-panel.open {
  transform: translateX(0);
  opacity: 1;
  box-shadow: var(--shadow-md);
}


/* ============================================================
   LEFT SIDEBAR COMPONENTS
   ============================================================ */

/* Logo */
.sidebar-logo {
  display: block;
  width: 148px;
  height: auto;
  padding-bottom: 0;
  margin-bottom: 0;
}

.sidebar-project-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-credit {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 2px;
}

.sidebar-credit-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.sidebar-credit-link {
  display: inline-flex;
  align-items: center;
  width: fit-content;
}

.sidebar-credit-link:hover .sidebar-logo {
  opacity: 0.88;
}

.sidebar-header-divider {
  margin: 18px 0 18px;
}

/* Site Navigation */
.sidebar-nav-label {
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--text-label);
  margin-bottom: 8px;
}

.sidebar-nav-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-bottom: 0;
  border-left: 1px solid var(--border);
  padding-left: 0;
}

.sidebar-nav-item {
  display: block;
  padding: 5px 10px 5px 14px;
  font-size: 13px;
  font-weight: 400;
  color: var(--slate-400);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  line-height: 1.45;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease, background var(--duration-fast) ease;
}

.sidebar-nav-item:hover {
  color: var(--text-heading);
  background: rgba(15, 23, 42, 0.04);
}

.sidebar-nav-item.active {
  color: var(--accent-blue);
  border-left-color: var(--accent-blue);
  background: var(--accent-blue-dim);
  font-weight: 500;
}

/* Divider */
.sidebar-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 12px 0 20px;
}

/* Page context */
.sidebar-classification {
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--text-label);
  margin-bottom: 0;
}

.sidebar-classification-link {
  display: inline-block;
  width: fit-content;
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) ease, opacity var(--duration-fast) ease;
}

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

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

.sidebar-page-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.3;
  margin-bottom: 4px;
}

.sidebar-page-subtitle {
  font-size: 13px;
  color: var(--slate-500);
  margin-bottom: 4px;
}

.sidebar-page-author {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.sidebar-page-author a {
  color: var(--text-heading);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-fast) ease, color var(--duration-fast) ease;
}

.sidebar-page-author a:hover {
  border-bottom-color: currentColor;
}

.sidebar-page-date {
  font-size: 13px;
  color: var(--slate-500);
  margin-bottom: 16px;
}

.sidebar-page-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 16px;
}

/* Table of Contents / Section label */
.sidebar-section-label {
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--text-label);
  margin-bottom: 10px;
  margin-top: 4px;
}

/* TOC items */
.toc-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.toc-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--slate-400);
  cursor: pointer;
  transition: background var(--duration-fast) ease, color var(--duration-fast) ease;
  line-height: 1.45;
}

.toc-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-heading);
}

.toc-item.active {
  background: var(--accent-blue-dim);
  color: var(--text-heading);
}

.toc-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.toc-number {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  width: 18px;
  flex-shrink: 0;
}

.toc-text {
  font-size: 13px;
  font-weight: 400;
  color: inherit;
}

.toc-section-header {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-top: 14px;
  margin-bottom: 6px;
  padding-left: 2px;
}


/* ============================================================
   DETAIL PANEL CONTENT
   ============================================================ */

.detail-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--surface-raised);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  z-index: 10;
  transition: background var(--duration-fast);
}
.detail-close:hover { background: var(--slate-700); }

.detail-header {
  padding: 24px 48px 18px 24px;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.detail-body {
  padding: 20px 24px 32px;
}

.detail-section {
  margin-bottom: 24px;
}

.detail-section-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.detail-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-body);
}

.detail-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}


/* ============================================================
   REUSABLE COMPONENTS
   ============================================================ */

/* ---- Page Header ---- */
.page-header {
  margin-bottom: 48px;
}

.page-header h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.page-header .subtitle {
  font-size: 14px;
  font-weight: 300;
  color: var(--slate-500);
}

.page-header .meta-line {
  font-size: 13px;
  color: var(--slate-500);
  margin-top: 4px;
}

/* ---- Section Labels ---- */
.section-label {
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* ---- Cards ---- */
.card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: box-shadow var(--duration-normal) var(--ease-out), border-color var(--duration-fast);
}

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

.card-accent {
  border-left: 3px solid var(--accent-color, var(--slate-400));
}

/* ---- Callout ---- */
.callout {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-left: 3px solid var(--df-accent);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 18px 0 22px;
}

.callout p { margin-bottom: 6px; color: var(--text-body); }
.callout p:last-child { margin-bottom: 0; }

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.badge-narrative {
  color: white;
  background: var(--badge-color, var(--slate-500));
}

.badge-outline {
  color: var(--badge-color, var(--slate-400));
  background: transparent;
  border: 1px solid currentColor;
}

.badge-gain { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(52, 211, 153, 0.3); }
.badge-loss { background: rgba(239, 68, 68, 0.15); color: #f87171; border: 1px solid rgba(248, 113, 113, 0.3); }
.badge-unmirrored { background: rgba(100, 116, 139, 0.15); color: #94a3b8; border: 1px solid rgba(148, 163, 184, 0.3); }

/* ---- Filter Buttons ---- */
.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  font-family: inherit;
}

.filter-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-body);
}

.filter-btn.active {
  background: var(--slate-200);
  color: var(--slate-900);
  border-color: var(--slate-200);
}

.filter-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ---- Tooltip ---- */
.tooltip {
  position: fixed;
  pointer-events: none;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  box-shadow: var(--shadow-lg);
  max-width: 320px;
  z-index: 2000;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
  font-size: 13px;
  line-height: 1.5;
}

.tooltip.visible { opacity: 1; }
.tooltip-title { font-weight: 600; margin-bottom: 4px; color: var(--text-heading); }
.tooltip-subtitle { font-size: 12px; color: var(--text-secondary); }

/* ---- Search Box ---- */
.search-box {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 13px;
  color: var(--text-body);
  background: var(--surface);
  transition: border-color var(--duration-fast);
  margin-bottom: 16px;
}
.search-box:focus {
  outline: none;
  border-color: var(--slate-500);
}
.search-box::placeholder { color: var(--text-muted); }

/* ---- Legend ---- */
.legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-body);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-line {
  width: 24px;
  height: 2px;
  flex-shrink: 0;
}

.legend-line-dashed {
  background: repeating-linear-gradient(
    90deg, currentColor 0, currentColor 4px, transparent 4px, transparent 8px
  );
  height: 2px;
  width: 24px;
}

/* ---- Stats Row ---- */
.stats-row {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.stat-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  text-align: center;
  flex: 1;
  min-width: 80px;
}

.stat-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.2;
}

.stat-label {
  font-size: 9.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-top: 2px;
}


/* ============================================================
   ANIMATIONS
   ============================================================ */

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.animate-in {
  animation: fadeIn var(--duration-normal) var(--ease-out) forwards;
}


/* ============================================================
   SCROLLBAR
   ============================================================ */

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(15, 23, 42, 0.18); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(15, 23, 42, 0.32); }

html[data-theme="dark"] ::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.12); }
html[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); }


/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Sidebar toggle (mobile) — ≥44px touch target (WCAG 2.5.5) */
.sidebar-toggle {
  display: none;
  align-items: center;
  gap: 7px;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 44px;
  padding: 10px 16px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-body);
  box-shadow: var(--shadow-sm);
  font-family: inherit;
}

/* ============================================================
   DETAIL PANEL — Empty State
   ============================================================ */

.detail-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 48px 32px;
  text-align: center;
}

.detail-empty-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.3;
}

.detail-empty-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.detail-empty-hint {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.55;
  max-width: 240px;
}


/* ============================================================
   ONBOARDING BLOCK
   ============================================================ */

.onboarding-block {
  margin-bottom: 16px;
}

.onboarding-block summary {
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-label);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.onboarding-block summary::-webkit-details-marker { display: none; }

.onboarding-block summary::before {
  content: '▸';
  font-size: 10px;
  color: var(--text-muted);
  transition: transform var(--duration-fast) var(--ease-out);
}

.onboarding-block[open] summary::before {
  transform: rotate(90deg);
}

.onboarding-content {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: 10px;
  padding-left: 16px;
  border-left: 2px solid var(--border);
}


/* ============================================================
   ZOOM CONTROLS & FOCUS RESET
   ============================================================ */

.zoom-reset-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 50;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  box-shadow: var(--shadow-sm);
}

.zoom-reset-btn:hover {
  color: var(--text-heading);
  border-color: var(--border-strong);
}

.focus-reset-btn {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  background: var(--accent-blue);
  border: none;
  border-radius: 20px;
  padding: 6px 16px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  box-shadow: var(--shadow-md);
  display: none;
}

.focus-reset-btn.visible {
  display: block;
}

.focus-reset-btn:hover {
  background: var(--df-accent-secondary);
}


/* ============================================================
   ZONE / CLUSTER ANNOTATIONS
   ============================================================ */

.zone-annotation {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  fill: var(--text-muted);
  pointer-events: none;
  text-anchor: middle;
  opacity: 0.6;
  transition: opacity 0.5s var(--ease-out);
}

.zone-annotation.faded {
  opacity: 0;
}


@media (max-width: 1400px) {
  /* Detail panel overlays instead of pushing */
  .main-viz.detail-open {
    right: 0;
  }
  .main-content.detail-open {
    margin-right: 0;
  }
  .detail-panel.open {
    box-shadow: var(--shadow-xl);
  }
}

@media (max-width: 1000px) {
  .sidebar-left {
    transform: translateX(-100%);
  }
  .sidebar-left.open {
    transform: translateX(0);
  }
  .sidebar-toggle {
    display: flex;
  }
  .main-viz {
    left: 0;
  }
  .main-content {
    margin-left: 0;
    padding: 48px 24px;
  }
}

@media (max-width: 600px) {
  .main-content {
    padding: 24px 14px;
  }
  .detail-panel {
    width: 100%;
    max-width: 100%;
  }
}


/* ============================================================
   EMBED MODE
   ============================================================ */

html.embed-mode .project-nav,
html.embed-mode .sidebar-left,
html.embed-mode .detail-panel,
html.embed-mode .sidebar-toggle,
html.embed-mode .zoom-reset-btn,
html.embed-mode .focus-reset-btn {
  display: none !important;
}

html.embed-mode .main-viz {
  top: 0; left: 0; right: 0; bottom: 0;
}