@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/ibm-plex-sans-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/ibm-plex-sans-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Source Serif 4";
  src: url("../fonts/source-serif-4-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

:root,
[data-theme="light"] {
  --bg: #f6f4f0;
  --paper: #fffcf7;
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --accent: #2171b5;
  --map-empty: #f0f0f0;
  --map-stroke: #fff;
  --map-ocean: #d9e6f2;
  --warn: #9a3412;
  --sup: #d97706;
  --cus: #7c3aed;
  --mat: #0f766e;
  --shadow: 0 8px 24px rgba(28, 25, 23, 0.08);
}
[data-theme="dark"] {
  --bg: #1c1917;
  --paper: #292524;
  --ink: #f5f5f4;
  --muted: #a8a29e;
  --line: #44403c;
  --accent: #6baed6;
  --map-empty: #3f3c3a;
  --map-stroke: #1c1917;
  --map-ocean: #292524;
  --warn: #fdba74;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
}
a { color: var(--accent); }
.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}
.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0 12px;
}
.site-header h1 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.65rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.02em;
}
.site-header nav {
  display: flex;
  gap: 14px;
  font-size: 0.92rem;
  font-weight: 500;
}
.site-header nav a { color: var(--ink); text-decoration: none; }
.site-header nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--accent); }
#theme-toggle {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  padding: 4px 10px;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}
.lede {
  color: var(--muted);
  max-width: 42rem;
  margin: 0 0 16px;
  font-size: 0.98rem;
}

.sticky {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  padding: 8px 0 10px;
  border-bottom: 1px solid var(--line);
}
.views { display: flex; gap: 8px; margin: 0 0 8px; }
.views button {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  padding: 6px 12px;
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
}
.views button.active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 16%, var(--paper));
}
#lock-note { font-size: 0.85rem; color: var(--muted); margin: 0 0 8px; }
#filters {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px 16px;
}
#filters fieldset {
  border: 1px solid var(--line);
  background: var(--paper);
  margin: 0;
  padding: 8px 12px 10px;
}
#filters legend { padding: 0 4px; font-size: 0.75rem; color: var(--muted); font-weight: 500; }
#filters label { display: block; font-size: 0.88rem; }
#filters.locked { opacity: 0.55; }
#filter-drawer { display: none; cursor: pointer; }

.stage {
  margin: 16px 0 8px;
  background: var(--paper);
  border: 1px solid var(--line);
}
#map { width: 100%; height: auto; display: block; cursor: grab; touch-action: none; }
#map:active { cursor: grabbing; }
#map path.country { cursor: grab; }
#map path.nloop, #map g.arc { cursor: grab; }
#map path.sphere { pointer-events: all; }

#legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  padding: 10px 14px 14px;
  font-size: 0.82rem;
  color: var(--muted);
}
#legend .chips { display: flex; gap: 10px; align-items: center; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.chip i, .swatch {
  width: 14px;
  height: 10px;
  display: inline-block;
  border: 1px solid var(--line);
}
.chip.b1 i { background: #c6dbef; }
.chip.b2 i { background: #6baed6; }
.chip.b3 i { background: #2171b5; }
.swatch.sup { background: var(--sup); }
.swatch.cus { background: var(--cus); }
.swatch.mat { background: var(--mat); border-style: dashed; }

.meta-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 8px 0 24px;
  color: var(--muted);
  font-size: 0.9rem;
}
.meta-row h2 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.05rem;
  color: var(--ink);
  margin: 0 0 6px;
}
footer.site-footer {
  border-top: 1px solid var(--line);
  padding: 20px 0 40px;
  color: var(--muted);
  font-size: 0.88rem;
}

#tooltip {
  position: fixed;
  z-index: 10;
  max-width: 360px;
  max-height: 50vh;
  overflow: auto;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 10px 12px;
  font-size: 0.82rem;
  box-shadow: var(--shadow);
}
#tooltip h3 { margin: 0 0 4px; font-size: 0.92rem; }
#tooltip .count, #tooltip .meta, #tooltip .src { color: var(--muted); margin: 0 0 6px; }
#tooltip blockquote {
  margin: 4px 0;
  padding-left: 8px;
  border-left: 2px solid var(--accent);
}
#tooltip .warn { color: var(--warn); }
#tooltip .ent { margin-bottom: 8px; }
#tooltip .ent strong { display: block; }
#tooltip.sheet {
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  top: auto !important;
  max-width: none;
  max-height: 40vh;
  border-radius: 12px 12px 0 0;
}

.prose { max-width: 42rem; padding: 8px 0 48px; }
.prose h2 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.25rem;
  margin: 1.6em 0 0.4em;
}
.prose table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.prose th, .prose td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose code { font-size: 0.85em; }
.error { color: var(--warn); padding: 12px; }

@media (max-width: 800px) {
  .site-header { flex-wrap: wrap; align-items: center; }
  .site-header h1 { font-size: 1.35rem; }
  .site-header nav { gap: 10px; font-size: 0.85rem; }
  #filter-drawer { display: block; font-size: 0.9rem; margin-bottom: 8px; }
  #filters { display: none; }
  #filter-drawer[open] + #filters {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .meta-row { grid-template-columns: 1fr; }
  .wrap { padding: 0 12px; }
  .stage { margin-left: -12px; margin-right: -12px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}