:root {
  --bg0: #0b1014;
  --bg1: #121a22;
  --bg2: #1a2632;
  --ink: #e8eef4;
  --muted: #8a9aab;
  --accent: #d4a35c;
  --accent2: #5cb8a8;
  --danger: #c45c5c;
  --line: rgba(232, 238, 244, 0.12);
  --panel: rgba(18, 26, 34, 0.88);
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Literata", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  height: 100%;
  background: var(--bg0);
  color: var(--ink);
  font-family: var(--font-body);
  overflow: hidden;
}

#app {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  grid-template-columns: 1fr;
  height: 100%;
}

.chrome-top {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.65rem 1rem;
  background: linear-gradient(180deg, #15202a, #0e151c);
  border-bottom: 1px solid var(--line);
  z-index: 5;
}

.brand { display: flex; align-items: center; gap: 0.7rem; min-width: 12rem; }
.brand-mark {
  width: 2.2rem; height: 2.2rem;
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-weight: 800;
  background: radial-gradient(circle at 30% 30%, #2a3a48, #0a1016);
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 0.35rem;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.05rem;
}
.brand-sub { font-size: 0.72rem; color: var(--muted); font-family: var(--font-mono); }

.tabs { display: flex; gap: 0.35rem; flex: 1; }
.tab {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  border-radius: 0.3rem;
}
.tab:hover { color: var(--ink); border-color: var(--line); }
.tab.active {
  color: var(--bg0);
  background: var(--accent);
  border-color: var(--accent);
}

.tour-controls { display: flex; gap: 0.4rem; }
.btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  border: 1px solid var(--line);
  background: var(--bg2);
  color: var(--ink);
  padding: 0.45rem 0.85rem;
  border-radius: 0.3rem;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent2); }
.btn.primary { background: var(--accent2); color: #06221e; border-color: var(--accent2); }
.btn.ghost { background: transparent; }

.narration {
  padding: 0.7rem 1.1rem 0.85rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.narration-phase {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}
#narration-text {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.45;
  max-width: 68rem;
}
.math-panel {
  margin-top: 0.55rem;
  padding: 0.55rem 0.7rem;
  background: #0a1218;
  border-left: 3px solid var(--accent);
  border-radius: 0 0.25rem 0.25rem 0;
}
.math-panel.hidden { display: none; }
.math-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}
.math-panel pre, .math-inline {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #c5d4e0;
  white-space: pre-wrap;
}

#stage {
  position: relative;
  min-height: 0;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(92, 184, 168, 0.08), transparent 45%),
    radial-gradient(ellipse at 80% 80%, rgba(212, 163, 92, 0.07), transparent 50%),
    linear-gradient(165deg, #0c1319 0%, #15202b 45%, #0a1015 100%);
}

.view {
  display: none;
  position: absolute;
  inset: 0;
}
.view.active { display: block; }

#map-canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.map-hud {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  pointer-events: none;
}
.hud-chip {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: rgba(10, 16, 22, 0.75);
  border: 1px solid var(--line);
  padding: 0.3rem 0.55rem;
  border-radius: 0.25rem;
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  font-size: 0.72rem;
  color: var(--muted);
  font-family: var(--font-mono);
}
.legend .swatch {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 1px;
  margin-right: 0.25rem;
  vertical-align: middle;
}

.outro-veil {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, transparent 0%, rgba(5, 8, 12, 0.92) 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 2.5s ease;
}
.outro-veil.on { opacity: 1; }
.outro-veil.hidden { display: none; }

#view-data {
  overflow: auto;
  padding: 1rem;
}
.data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(11.5rem, 1fr));
  gap: 0.65rem;
}
.data-card {
  background: linear-gradient(160deg, rgba(30, 42, 54, 0.9), rgba(14, 20, 28, 0.95));
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  padding: 0.7rem 0.75rem;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
}
.data-card:hover {
  border-color: var(--accent2);
  transform: translateY(-1px);
}
.data-card h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
}
.data-card .meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  line-height: 1.35;
}
.bar-row {
  display: flex;
  height: 0.35rem;
  margin-top: 0.45rem;
  border-radius: 1px;
  overflow: hidden;
  background: #0a1016;
}
.bar-row span { display: block; height: 100%; }

.detail-drawer {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: min(28rem, 100%);
  background: rgba(10, 15, 20, 0.96);
  border-left: 1px solid var(--line);
  padding: 1rem 1.1rem;
  overflow: auto;
  z-index: 4;
}
.detail-drawer.hidden { display: none; }
.drawer-close {
  position: absolute;
  right: 0.7rem;
  top: 0.5rem;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 1.4rem;
  cursor: pointer;
}
.muted { color: var(--muted); }
#detail-title { font-family: var(--font-display); margin-top: 0.2rem; }
#hist-canvas, #tl-canvas { width: 100%; margin-top: 0.6rem; background: #070b10; border-radius: 0.25rem; }

#view-sources { overflow: auto; padding: 1rem; }
.sources-layout {
  display: grid;
  grid-template-columns: minmax(12rem, 18rem) 1fr;
  gap: 1rem;
  height: 100%;
  min-height: 20rem;
}
.sources-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.source-row {
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  background: rgba(16, 24, 32, 0.8);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}
.source-row .name { color: var(--ink); font-size: 0.78rem; margin-bottom: 0.2rem; word-break: break-all; }
.source-row .bar {
  height: 0.4rem;
  background: #0a1016;
  border-radius: 1px;
  overflow: hidden;
  margin: 0.3rem 0;
}
.source-row .bar i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--danger), var(--accent), var(--accent2));
}
.sources-viz {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-width: 0;
}
#beta-canvas {
  width: 100%;
  max-height: 22rem;
  background: #070b10;
  border-radius: 0.35rem;
  border: 1px solid var(--line);
}
.settle-feed {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
  max-height: 8rem;
  overflow: auto;
  border: 1px solid var(--line);
  padding: 0.5rem 0.65rem;
  border-radius: 0.3rem;
  background: rgba(8, 12, 16, 0.7);
}
.settle-feed .hit { color: var(--accent2); }
.settle-feed .miss { color: var(--danger); }

.chrome-bottom {
  border-top: 1px solid var(--line);
  background: #0d141b;
  padding: 0.55rem 1rem 0.7rem;
  z-index: 5;
}
.timeline-wrap { position: relative; margin-bottom: 0.35rem; }
#year-slider {
  width: 100%;
  accent-color: var(--accent2);
  cursor: pointer;
}
.ticks {
  position: absolute;
  left: 0; right: 0; top: 0; bottom: 0;
  pointer-events: none;
}
.tick {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: rgba(212, 163, 92, 0.55);
}
.transport {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}
.speed {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.speed select {
  background: var(--bg2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 0.25rem;
  padding: 0.2rem 0.35rem;
}
.year-readout {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--accent);
  min-width: 3.5rem;
}
.alpha-tag {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 0.2rem 0.45rem;
  border-radius: 0.2rem;
}

@media (max-width: 800px) {
  .chrome-top { flex-wrap: wrap; }
  .brand { min-width: auto; }
  .sources-layout { grid-template-columns: 1fr; }
  #narration-text { font-size: 0.95rem; }
}

/* --- transport presets, beacon gate, data toolbar (PLAN §9) --- */
.hidden { display: none !important; }

.speed-presets { display: flex; gap: 4px; }
.speed-btn { padding: 6px 10px; font-size: 12px; }
.speed-btn.active {
  background: var(--accent2);
  color: #06221e;
  border-color: var(--accent2);
}

.gate {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  animation: gate-in 0.35s ease;
}
.gate .btn { font-size: 14px; padding: 9px 14px; }
@keyframes gate-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.data-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 14px 0;
}
.data-toolbar .muted { font-size: 12.5px; color: var(--ink-dim, #8a9aab); }