/* ============================================
   OUT-OF-WORLD DESIGN SYSTEM
   For analytical/meta pages outside the narrative frame.
   Default: light mode (white background).
   Toggle: dark mode uses standard site colors.
   Only colors change between modes — fonts, sizes,
   spacing, and layout are identical.
   ============================================ */

/* ─── LIGHT MODE (DEFAULT) ─── */
:root {
  /* Backgrounds */
  --ow-bg:         #ffffff;
  --ow-bg2:        #f5f4f1;
  --ow-bg3:        #eae8e4;
  --ow-bg4:        #e0ddd8;

  /* Accents — tuned for white backgrounds */
  --ow-accent:     #6c47d6;    /* deep violet — the primary data accent */
  --ow-accent2:    #0e8a6f;    /* dark teal — secondary accent */
  --ow-accent-dim: rgba(108,71,214,0.10);
  --ow-accent-glow:rgba(108,71,214,0.05);
  --ow-ember:      #d45a14;    /* warm orange for highlights */
  --ow-gold:       #b8860b;    /* dark gold for tertiary */

  /* Text */
  --ow-text:       #1a1a1a;
  --ow-text-soft:  #3a3a3a;
  --ow-muted:      #6b6b6b;
  --ow-muted2:     #999999;

  /* Rules & borders */
  --ow-rule:       1px solid rgba(0,0,0,0.10);
  --ow-rule-accent:1px solid rgba(108,71,214,0.20);

  /* Charts */
  --ow-chart-grid: rgba(0,0,0,0.06);
  --ow-chart-tick: #6b6b6b;
  --ow-chart-line1:#6c47d6;
  --ow-chart-line2:#0e8a6f;
  --ow-chart-fill1:rgba(108,71,214,0.08);
  --ow-chart-fill2:rgba(14,138,111,0.08);
  --ow-tooltip-bg: #ffffff;
  --ow-tooltip-border:#6c47d6;
  --ow-tooltip-title:#6b6b6b;
  --ow-tooltip-body:#1a1a1a;

  /* Number line reference colors */
  --ow-nl-ref:     #0e8a6f;
  --ow-nl-ref2:    #6c47d6;
  --ow-nl-ref3:    #d45a14;
  --ow-nl-sim:     #b8860b;

  /* Slider */
  --ow-slider-track:rgba(0,0,0,0.12);
  --ow-slider-thumb-bg:#ffffff;
  --ow-slider-thumb-border:#6c47d6;
  --ow-slider-thumb-shadow:rgba(108,71,214,0.15);

  /* Cube visuals */
  --ow-cube-bg:    rgba(108,71,214,0.08);
  --ow-cube-border:rgba(108,71,214,0.25);
  --ow-cube-top:   rgba(108,71,214,0.12);
  --ow-cube-right: rgba(108,71,214,0.06);
  --ow-cube-sim-bg:rgba(108,71,214,0.18);

  /* Toggle button */
  --ow-toggle-border:rgba(0,0,0,0.15);
  --ow-toggle-text: #6b6b6b;
  --ow-toggle-hover:#6c47d6;
  --ow-toggle-active-bg:rgba(108,71,214,0.06);

  /* Misc */
  --ow-radius:     8px;
}

/* ─── DARK MODE ─── */
/* Activated by [data-theme="dark"] on <html> or <body> */
[data-theme="dark"] {
  /* Backgrounds — standard site colors */
  --ow-bg:         #0a0e17;
  --ow-bg2:        #111827;
  --ow-bg3:        #1a1f2e;
  --ow-bg4:        #222840;

  /* Accents — standard site accents */
  --ow-accent:     #00d4aa;    /* site teal */
  --ow-accent2:    #ff5e1a;    /* site hot orange */
  --ow-accent-dim: rgba(0,212,170,0.12);
  --ow-accent-glow:rgba(0,212,170,0.06);
  --ow-ember:      #ff5e1a;
  --ow-gold:       #f5c542;

  /* Text */
  --ow-text:       #e8e6e1;
  --ow-text-soft:  #c0bdb6;
  --ow-muted:      #8a8d96;
  --ow-muted2:     #555a66;

  /* Rules & borders */
  --ow-rule:       1px solid rgba(255,255,255,0.08);
  --ow-rule-accent:1px solid rgba(0,212,170,0.20);

  /* Charts */
  --ow-chart-grid: rgba(255,255,255,0.06);
  --ow-chart-tick: #8a8d96;
  --ow-chart-line1:#00d4aa;
  --ow-chart-line2:#ff5e1a;
  --ow-chart-fill1:rgba(0,212,170,0.08);
  --ow-chart-fill2:rgba(255,94,26,0.08);
  --ow-tooltip-bg: #111827;
  --ow-tooltip-border:#00d4aa;
  --ow-tooltip-title:#8a8d96;
  --ow-tooltip-body:#e8e6e1;

  /* Number line */
  --ow-nl-ref:     #00d4aa;
  --ow-nl-ref2:    #f5c542;
  --ow-nl-ref3:    #ff5e1a;
  --ow-nl-sim:     #f5c542;

  /* Slider */
  --ow-slider-track:rgba(255,255,255,0.12);
  --ow-slider-thumb-bg:#0a0e17;
  --ow-slider-thumb-border:#00d4aa;
  --ow-slider-thumb-shadow:rgba(0,212,170,0.15);

  /* Cube visuals */
  --ow-cube-bg:    rgba(0,212,170,0.08);
  --ow-cube-border:rgba(0,212,170,0.25);
  --ow-cube-top:   rgba(0,212,170,0.12);
  --ow-cube-right: rgba(0,212,170,0.05);
  --ow-cube-sim-bg:rgba(0,212,170,0.18);

  /* Toggle */
  --ow-toggle-border:rgba(255,255,255,0.15);
  --ow-toggle-text: #8a8d96;
  --ow-toggle-hover:#00d4aa;
  --ow-toggle-active-bg:rgba(0,212,170,0.06);
}

/* ─── SHARED STRUCTURAL STYLES ─── */
/* These do NOT change between light and dark mode. */

.ow-body {
  font-family: 'Source Serif 4', Georgia, serif;
  background: var(--ow-bg);
  color: var(--ow-text);
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

/* Header */
.ow-header {
  padding: 2rem 2.5rem 1.5rem;
  border-bottom: var(--ow-rule);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  transition: border-color 0.3s;
}

.ow-header-left {
  flex: 1;
}

.ow-breadcrumb {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--ow-muted);
  margin-bottom: 1rem;
  text-transform: uppercase;
  transition: color 0.3s;
}

.ow-breadcrumb a {
  color: var(--ow-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.ow-breadcrumb a:hover { color: var(--ow-accent); }

.ow-breadcrumb .ow-bc-active { color: var(--ow-accent); }

.ow-page-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 400;
  color: var(--ow-text);
  letter-spacing: 0.02em;
  margin-bottom: 0.5rem;
  line-height: 1.15;
  transition: color 0.3s;
}

.ow-page-title em {
  color: var(--ow-accent);
  font-style: normal;
}

.ow-page-desc {
  font-size: 1rem;
  color: var(--ow-muted);
  max-width: 580px;
  line-height: 1.7;
  transition: color 0.3s;
}

/* Theme toggle */
.ow-theme-toggle {
  background: transparent;
  border: 1px solid var(--ow-toggle-border);
  border-radius: 4px;
  color: var(--ow-toggle-text);
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  padding: 0.45rem 0.75rem;
  cursor: pointer;
  transition: all 0.25s;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.ow-theme-toggle:hover {
  border-color: var(--ow-toggle-hover);
  color: var(--ow-toggle-hover);
}

/* Layout: controls LEFT, main RIGHT */
.ow-layout {
  display: grid;
  grid-template-columns: 290px 1fr;
  min-height: calc(100vh - 140px);
}

@media (max-width: 900px) {
  .ow-layout { grid-template-columns: 1fr; }
}

/* Controls sidebar */
.ow-controls {
  background: var(--ow-bg2);
  border-right: var(--ow-rule);
  padding: 2rem 1.75rem;
  overflow-y: auto;
  position: sticky;
  top: 0;
  height: 100vh;
  transition: background 0.3s, border-color 0.3s;
}

@media (max-width: 900px) {
  .ow-controls {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: var(--ow-rule);
  }
}

.ow-controls-header {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ow-accent);
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: var(--ow-rule);
  transition: color 0.3s, border-color 0.3s;
}

.ow-control-group {
  margin-bottom: 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: var(--ow-rule);
  transition: border-color 0.3s;
}

.ow-control-group:last-of-type { border-bottom: none; margin-bottom: 0; }

.ow-group-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ow-accent2);
  margin-bottom: 1.1rem;
  transition: color 0.3s;
}

.ow-slider-row { margin-bottom: 1.1rem; }

.ow-slider-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.45rem;
}

.ow-slider-top label {
  font-size: 0.9rem;
  color: var(--ow-text-soft);
  line-height: 1.3;
  transition: color 0.3s;
}

.ow-slider-top .ow-val {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.85rem;
  color: var(--ow-accent);
  white-space: nowrap;
  margin-left: 0.5rem;
  transition: color 0.3s;
}

.ow-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 2px;
  background: var(--ow-slider-track);
  outline: none;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.3s;
}

.ow-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 15px;
  height: 15px;
  background: var(--ow-slider-thumb-bg);
  border: 2px solid var(--ow-slider-thumb-border);
  border-radius: 50%;
  cursor: pointer;
  transition: box-shadow 0.2s, background 0.3s, border-color 0.3s;
}

.ow-slider::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 5px var(--ow-slider-thumb-shadow);
}

.ow-log-toggle {
  width: 100%;
  background: transparent;
  border: 1px solid var(--ow-toggle-border);
  border-radius: 4px;
  color: var(--ow-toggle-text);
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.6rem 1rem;
  cursor: pointer;
  transition: all 0.25s;
  text-align: left;
}

.ow-log-toggle:hover {
  border-color: var(--ow-toggle-hover);
  color: var(--ow-toggle-hover);
}

.ow-log-toggle.active {
  border-color: var(--ow-accent);
  color: var(--ow-accent);
  background: var(--ow-toggle-active-bg);
}

/* Main content */
.ow-main {
  padding: 2rem 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  overflow-y: auto;
}

/* Stats grid */
.ow-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.ow-stat-card {
  background: var(--ow-bg2);
  border: 1px solid var(--ow-accent-dim);
  border-radius: var(--ow-radius);
  padding: 1.75rem 1.5rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.35s, background 0.3s;
}

.ow-stat-card:hover { border-color: var(--ow-accent); }

.ow-stat-card.primary {
  border-left: 3px solid var(--ow-accent);
}

.ow-stat-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ow-muted);
  margin-bottom: 0.85rem;
  transition: color 0.3s;
}

.ow-stat-value {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  line-height: 1;
  letter-spacing: -0.02em;
  transition: color 0.3s;
}

.ow-stat-card.primary .ow-stat-value { color: var(--ow-accent); }
.ow-stat-card:not(.primary) .ow-stat-value { color: var(--ow-text); }

.ow-stat-unit {
  font-size: 0.85rem;
  color: var(--ow-muted);
  margin-top: 0.6rem;
  transition: color 0.3s;
}

/* Charts */
.ow-chart-panel {
  background: var(--ow-bg2);
  border: 1px solid var(--ow-accent-dim);
  border-radius: var(--ow-radius);
  overflow: hidden;
  transition: background 0.3s, border-color 0.3s;
}

.ow-chart-header {
  padding: 1.1rem 1.5rem 0.75rem;
  border-bottom: var(--ow-rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  transition: border-color 0.3s;
}

.ow-chart-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ow-muted);
  transition: color 0.3s;
}

.ow-chart-unit {
  font-size: 0.8rem;
  color: var(--ow-muted2);
  transition: color 0.3s;
}

.ow-chart-container {
  padding: 1rem 1.25rem 1.25rem;
  height: 200px;
}

/* Scale section */
.ow-scale-section {
  border: 1px solid var(--ow-accent-dim);
  border-radius: var(--ow-radius);
  background: var(--ow-bg2);
  overflow: hidden;
  transition: background 0.3s, border-color 0.3s;
}

.ow-scale-header {
  padding: 1.25rem 1.75rem;
  border-bottom: var(--ow-rule);
  background: var(--ow-accent-glow);
  transition: background 0.3s, border-color 0.3s;
}

.ow-scale-header h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ow-muted);
  margin-bottom: 0.3rem;
  transition: color 0.3s;
}

.ow-scale-header p {
  font-size: 0.9rem;
  color: var(--ow-muted2);
  transition: color 0.3s;
}

.ow-scale-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 700px) {
  .ow-scale-body { grid-template-columns: 1fr; }
}

/* Number line */
.ow-number-line-wrap {
  grid-column: 1 / -1;
  padding: 1.75rem;
  border-bottom: var(--ow-rule);
  transition: border-color 0.3s;
}

.ow-nl-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ow-accent2);
  margin-bottom: 1.25rem;
  transition: color 0.3s;
}

.ow-nl-container {
  position: relative;
  height: 80px;
  margin-bottom: 0.5rem;
}

.ow-nl-track {
  position: absolute;
  bottom: 28px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--ow-accent-dim);
  transition: background 0.3s;
}

.ow-nl-marker {
  position: absolute;
  bottom: 22px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.ow-nl-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid;
  background: var(--ow-bg);
  flex-shrink: 0;
  transition: background 0.3s;
}

.ow-nl-line {
  width: 1px;
  height: 12px;
  background: currentColor;
  opacity: 0.5;
}

.ow-nl-label-text {
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.58rem;
  white-space: nowrap;
  text-align: center;
  line-height: 1.3;
  letter-spacing: 0.06em;
}

.ow-nl-marker.sim-marker .ow-nl-dot {
  width: 10px;
  height: 10px;
}

.ow-nl-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  margin-top: 0.5rem;
}

.ow-legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--ow-muted);
  transition: color 0.3s;
}

.ow-legend-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Cube comparison */
.ow-cube-col {
  padding: 1.5rem 1.75rem;
  border-right: var(--ow-rule);
  transition: border-color 0.3s;
}

.ow-sub-header {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ow-accent2);
  margin-bottom: 1.25rem;
  transition: color 0.3s;
}

.ow-cube-intro {
  font-size: 0.88rem;
  color: var(--ow-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
  transition: color 0.3s;
}

.ow-cube-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  align-items: end;
  margin-bottom: 1.25rem;
}

.ow-cube-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.ow-cube-visual {
  background: var(--ow-cube-bg);
  border: 1px solid var(--ow-cube-border);
  border-radius: 2px;
  width: 100%;
  flex-shrink: 0;
  position: relative;
  transition: background 0.3s, border-color 0.3s;
}

.ow-cube-visual::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 5px;
  right: -5px;
  height: 5px;
  background: var(--ow-cube-top);
  border: 1px solid var(--ow-cube-border);
  border-bottom: none;
  clip-path: polygon(0 100%, 15% 0, 100% 0, 85% 100%);
  transition: background 0.3s, border-color 0.3s;
}

.ow-cube-visual::after {
  content: '';
  position: absolute;
  top: -5px;
  right: -5px;
  bottom: 0;
  width: 5px;
  background: var(--ow-cube-right);
  border: 1px solid var(--ow-cube-border);
  border-left: none;
  clip-path: polygon(0 8%, 100% 0, 100% 100%, 0 100%);
  transition: background 0.3s, border-color 0.3s;
}

.ow-cube-item.sim-cube .ow-cube-visual {
  background: var(--ow-cube-sim-bg);
  border-color: var(--ow-accent);
}

.ow-cube-item.sim-cube .ow-cube-visual::before {
  background: var(--ow-cube-sim-bg);
  border-color: var(--ow-accent);
}

.ow-cube-item.sim-cube .ow-cube-visual::after {
  background: var(--ow-cube-bg);
  border-color: var(--ow-accent);
}

.ow-cube-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  color: var(--ow-muted);
  text-align: center;
  line-height: 1.3;
  transition: color 0.3s;
}

.ow-cube-item.sim-cube .ow-cube-label { color: var(--ow-accent); }

.ow-cube-note {
  font-size: 0.85rem;
  color: var(--ow-muted);
  line-height: 1.6;
  padding-top: 0.75rem;
  border-top: var(--ow-rule);
  transition: color 0.3s, border-color 0.3s;
}

.ow-cube-note strong {
  color: var(--ow-text-soft);
  font-weight: 600;
}

/* Analogies */
.ow-analogy-col {
  padding: 1.5rem 1.75rem;
}

.ow-analogy-cards {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ow-analogy-card {
  background: var(--ow-bg3);
  border: 1px solid var(--ow-accent-dim);
  border-radius: 6px;
  padding: 1rem 1.1rem;
  transition: background 0.3s, border-color 0.3s;
}

.ow-analogy-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ow-muted2);
  margin-bottom: 0.4rem;
  transition: color 0.3s;
}

.ow-analogy-value {
  font-size: 1rem;
  color: var(--ow-text);
  margin-bottom: 0.25rem;
  line-height: 1.3;
  transition: color 0.3s;
}

.ow-analogy-value strong {
  color: var(--ow-accent);
  font-weight: 600;
}

.ow-analogy-sub {
  font-size: 0.82rem;
  color: var(--ow-muted);
  line-height: 1.4;
  transition: color 0.3s;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .ow-header {
    padding: 1.5rem;
    flex-direction: column;
    gap: 1rem;
  }

  .ow-main {
    padding: 1.5rem;
  }

  .ow-stats-grid {
    grid-template-columns: 1fr;
  }
}
