/* ═══════════════════════════════════════════════════════════════════
   Won't Somebody Think of the Poor Billionaires?
   Full-page treemap — minimal chrome.
   ═══════════════════════════════════════════════════════════════════ */

:root {
  --bg:           #09090f;
  --bg-card:      #111119;
  --border:       rgba(255,255,255,0.06);
  --text:         #eeeef6;
  --text-dim:     #8888a8;
  --text-muted:   #555570;
  --accent:       #818cf8;
  --accent-dim:   rgba(129,140,248,0.10);
  --gold:         #fbbf24;
  --gold-dim:     rgba(251,191,36,0.10);
  --rose:         #fb7185;
  --font:         'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', var(--font);
  --font-mono:    'JetBrains Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body.viz-page {
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--text); }

/* ─── Header ─────────────────────────────────────────────────────── */
#header {
  text-align: center;
  padding: 1.25rem 1.5rem 0.75rem;
  flex-shrink: 0;
  background: rgba(9, 9, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--text);
}

h1 em { font-style: italic; color: var(--gold); }
h1 .q { color: var(--text-muted); }

.subtitle {
  margin-top: 0.45rem;
  font-size: clamp(0.72rem, 1.5vw, 0.88rem);
  color: var(--text-dim);
  font-weight: 400;
}
.subtitle strong { color: var(--text); font-weight: 600; }

/* ─── Chart ──────────────────────────────────────────────────────── */
#chart-wrap {
  flex: 1;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0.5rem;
  position: relative;
  min-height: 0;
  overflow: hidden;
}

#chart-wrap svg {
  border-radius: 8px;
  overflow: hidden;
  opacity: 0;
  animation: chartFadeIn 0.35s ease-out forwards;
}

@keyframes chartFadeIn {
  to { opacity: 1; }
}

.chart-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Treemap rects */
#chart-wrap rect {
  cursor: pointer;
  transition: opacity 0.12s ease;
}

/* ─── Tooltip ─────────────────────────────────────────────────────── */
.tip {
  position: fixed;
  background: rgba(9,9,15,0.94);
  border: 1px solid rgba(129,140,248,0.3);
  border-radius: 10px;
  padding: 0.6rem 0.85rem;
  font-size: 0.78rem;
  color: var(--text);
  pointer-events: none;
  z-index: 50;
  display: none;
  flex-direction: column;
  gap: 0.15rem;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
  max-width: 240px;
  line-height: 1.4;
}

.tip-musk { border-color: rgba(251,191,36,0.4); }
.tip-name { font-weight: 700; font-size: 0.85rem; }
.tip-val  { color: var(--accent); font-family: var(--font-mono); font-weight: 600; font-size: 0.95rem; }
.tip-musk .tip-val { color: var(--gold); }
.tip-rank { color: var(--text-muted); font-size: 0.72rem; }
.tip-pct  { color: var(--text-dim); font-size: 0.72rem; }

/* ─── Footer Wrap ────────────────────────────────────────────────── */
#footer-wrap {
  width: 100%;
  background: rgba(9, 9, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
}

/* ─── Fact Box ───────────────────────────────────────────────────── */
#fact-container {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0.6rem 1.5rem 0.2rem;
}

.fact-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 1rem;
}

.fact-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.fact-label {
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
}

#fact-text {
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--text-dim);
}

#fact-text strong {
  color: var(--gold);
}

#fact-text a {
  text-decoration: underline;
  text-underline-offset: 2px;
  font-weight: 500;
}

#fact-next-btn {
  background: var(--accent-dim);
  border: 1px solid rgba(129,140,248,0.25);
  color: var(--accent);
  padding: 0.35rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
  font-family: var(--font);
}

#fact-next-btn:hover {
  background: var(--accent);
  color: #09090f;
  border-color: var(--accent);
}

/* Glossary triggers */
.glossary-trigger {
  text-decoration: underline dotted var(--accent);
  cursor: help;
  color: var(--text);
  position: relative;
  display: inline-block;
}

.glossary-trigger:hover {
  color: var(--gold);
}

/* Tooltip element */
.glossary-tooltip {
  position: absolute;
  bottom: 140%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(17, 17, 25, 0.98);
  border: 1px solid rgba(129, 140, 248, 0.4);
  border-radius: 8px;
  padding: 0.55rem 0.75rem;
  font-size: 0.72rem;
  color: var(--text-dim);
  width: 240px;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease, transform 0.15s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.8);
  line-height: 1.45;
  text-align: left;
  font-weight: 400;
}

.glossary-tooltip strong {
  color: var(--accent) !important;
  display: block;
  margin-bottom: 0.15rem;
}

.glossary-trigger:hover .glossary-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

/* ─── Footer ─────────────────────────────────────────────────────── */
#footer {
  width: 100%;
  padding: 0.5rem 1rem 0.6rem;
  text-align: center;
  font-size: 0.65rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

#footer a { font-weight: 500; }

/* ─── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 640px) {
  #header { padding: 0.8rem 0.75rem 0.5rem; }
  #header h1 { font-size: 1.25rem; }
  #fact-container { padding: 0.4rem 0.5rem 0.2rem; }
  .fact-box { gap: 0.6rem; padding: 0.5rem 0.75rem; flex-direction: column; text-align: center; }
  #fact-text { font-size: 0.75rem; }
  #fact-next-btn { width: 100%; padding: 0.4rem; font-size: 0.7rem; }
  #chart-wrap { padding: 0.25rem; }
  #footer { padding: 0.4rem 0.5rem 0.5rem; gap: 0.5rem; }
  .glossary-tooltip { width: 200px; bottom: 130%; }
}