:root {
  --bg: #10110f;
  --bg-panel: #151714;
  --bg-panel-2: #1b1d19;
  --ink: #e5e6df;
  --ink-dim: #9a9e95;
  --ink-faint: #6f746b;
  --accent: #e7c56b;
  --signal: #d97757;
  --line: #2c302a;
  --grid: #20231f;
  --grid-major: #292d27;
  --serif: "Charter", "Bitstream Charter", "Georgia", serif;
  --sans: "Helvetica Neue", "Nimbus Sans", Arial, sans-serif;
  --mono: "SFMono-Regular", "SF Mono", "Menlo", "Consolas", monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
* { scrollbar-width: thin; scrollbar-color: #3b4038 var(--bg); }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: var(--bg); }
*::-webkit-scrollbar-thumb { background: #3b4038; border: 2px solid var(--bg); }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 13px/1.55 var(--sans); font-weight: 400;
  display: flex; flex-direction: column; overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- header ---------- */
#topbar {
  display: grid; grid-template-columns: 232px minmax(0, 1fr); align-items: end; gap: 18px;
  padding: 15px 14px 12px 18px; border-bottom: 1px solid var(--line);
  background: var(--bg);
  flex: none;
}
#brand-kicker {
  display: block; margin-bottom: 5px; color: var(--signal); font: 600 9px/1 var(--mono);
  letter-spacing: .14em;
}
#brand h1 { font: 500 18px/1.1 var(--sans); margin: 0; letter-spacing: -.015em; }
#brand-sub { margin: 3px 0 0; font-size: 10.5px; color: var(--ink-faint); letter-spacing: .025em; }
#map-tabs {
  display: flex; align-items: center; gap: 18px; flex-wrap: nowrap;
  min-width: 0; overflow-x: auto; overflow-y: hidden; padding-bottom: 3px;
  scrollbar-width: none;
}
#map-tabs::-webkit-scrollbar { display: none; }
.map-tab {
  display: inline-flex; align-items: baseline; gap: 6px; position: relative;
  border: 0; background: none; color: var(--ink-dim);
  padding: 3px 0 5px; font: 500 11.5px/1.2 var(--sans); cursor: pointer;
  transition: color .15s ease; flex: none;
}
.map-tab::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: transparent;
}
.map-tab:hover { color: var(--ink); }
.map-tab.active { color: var(--ink); }
.map-tab.active::after { background: var(--signal); }
.tab-index { color: var(--ink-faint); font: 9px/1 var(--mono); letter-spacing: .02em; }
.map-tab.active .tab-index { color: var(--signal); }

/* ---------- layout ---------- */
#layout { flex: 1; display: grid; grid-template-columns: 232px 1fr 348px; min-height: 0; }
#side-left { border-right: 1px solid var(--line); overflow-y: auto; padding: 17px 14px; }
#side-right { border-left: 1px solid var(--line); overflow-y: auto; padding: 17px 18px; }
#stage { min-width: 0; display: flex; }

.panel { background: transparent; }
.panel h2 {
  font: 600 9.5px var(--mono); text-transform: uppercase; letter-spacing: .1em;
  color: var(--ink-faint); margin: 0 0 9px;
}
#side-left .panel { margin-bottom: 22px; }
.legend-subhead { margin-top: 17px !important; }

/* layers */
.layer-toggle { display: flex; align-items: center; gap: 9px; padding: 3px 0; cursor: pointer; color: var(--ink-dim); font-size: 12px; }
.layer-toggle:hover { color: var(--ink); }
.layer-toggle input {
  appearance: none; width: 11px; height: 11px; margin: 0; border: 1px solid #555b51;
  background: transparent; position: relative; flex: none;
}
.layer-toggle input:checked { border-color: var(--accent); background: var(--accent); }
.layer-toggle input:checked::after {
  content: ""; position: absolute; width: 5px; height: 2px; left: 2px; top: 2px;
  border: solid #141511; border-width: 0 0 1.5px 1.5px; transform: rotate(-45deg);
}

/* legend */
.legend-row { display: flex; align-items: center; gap: 9px; font-size: 10.5px; line-height: 1.45; color: var(--ink-dim); padding: 2px 0; }
.legend-row b { color: var(--ink); font-weight: 500; }
.legend-symbol { width: 30px; text-align: center; flex: none; color: var(--accent); }
.lg-sharp { stroke: #cfd8e6; stroke-width: 2.5; }
.lg-cross { stroke: #cfd8e6; stroke-width: 2; stroke-dasharray: 8 5; }
.lg-conj  { stroke: #cfd8e6; stroke-width: 2; stroke-dasharray: 2 5; stroke-linecap: round; }
.lg-front { stroke: #cfd8e6; stroke-width: 2; stroke-dasharray: 12 3 3 3; }
.sw { width: 30px; height: 10px; display: inline-block; flex: none; }
.sw-est   { background: rgba(91,156,245,.38); border: 1px solid rgba(91,156,245,.8); }
.sw-eff   { background: rgba(91,156,245,.20); border: 1px solid rgba(91,156,245,.55); }
.sw-conj  { background: repeating-linear-gradient(45deg, rgba(91,156,245,.30) 0 3px, transparent 3px 7px); border: 1px dashed rgba(91,156,245,.7); }
.sw-terra { background: #0a0e14; border: 1px dotted #55617a; }

/* map index (left) */
#map-index .idx-group { margin-bottom: 12px; }
#map-index .idx-head { font: 500 10px var(--mono); color: var(--ink-faint); letter-spacing: .04em; margin: 7px 0 3px; }
#map-index .idx-item {
  display: block; width: 100%; text-align: left; background: none; border: none;
  color: var(--ink-dim); font: 400 11.5px/1.35 var(--sans); padding: 3px 3px; cursor: pointer;
}
#map-index .idx-item:hover { background: var(--bg-panel-2); color: var(--ink); }
#map-index .idx-item .dot { display: inline-block; width: 5px; height: 5px; border-radius: 50%; margin: 0 8px 1px 0; }

/* ---------- stage ---------- */
#plot-wrap { position: relative; flex: 1; min-width: 0; }
#plot { position: absolute; inset: 0; width: 100%; height: 100%; display: block; cursor: grab; }
#plot.dragging { cursor: grabbing; }

#tooltip {
  position: absolute; pointer-events: none; z-index: 30;
  background: rgba(21,23,20,.96); border: 1px solid #3b4038;
  padding: 7px 10px; font-size: 11.5px; max-width: 300px; color: var(--ink);
  box-shadow: 0 10px 28px rgba(0,0,0,.36);
}
#tooltip .tt-name { font-weight: 600; margin-bottom: 2px; }
#tooltip .tt-values { color: var(--accent); font-family: var(--mono); font-size: 11px; }
#tooltip .tt-note { color: var(--ink-dim); margin-top: 3px; }

#readout {
  position: absolute; left: 12px; bottom: 10px; z-index: 20; pointer-events: none;
  font: 10px var(--mono); color: var(--ink-dim);
  background: rgba(16,17,15,.82); padding: 3px 7px;
}
#plot-controls { position: absolute; right: 12px; top: 10px; z-index: 20; display: flex; gap: 6px; }
#plot-controls button {
  background: rgba(21,23,20,.92); color: var(--ink-dim); border: 1px solid var(--line);
  padding: 4px 9px; font: 10px var(--mono); cursor: pointer;
}
#plot-controls button:hover { color: var(--ink); border-color: #50564c; }

/* ---------- svg elements ---------- */
.grid-line { stroke: var(--grid); stroke-width: 1; }
.grid-line.major { stroke: var(--grid-major); }
.axis-tick { fill: var(--ink-dim); font: 10px var(--mono); }
.axis-title { fill: var(--ink); font: italic 13px var(--serif); letter-spacing: .01em; }

.region { cursor: pointer; transition: fill-opacity .15s; }
.region-label {
  font: 500 11.5px var(--sans); letter-spacing: .11em; text-transform: uppercase;
  pointer-events: none; text-anchor: middle;
}
.region-label .sub { font: italic 400 10.5px var(--serif); letter-spacing: .03em; text-transform: none; }

.seam-hit { stroke: transparent; stroke-width: 14; fill: none; cursor: pointer; }
.seam { fill: none; pointer-events: none; }
.seam-label {
  font: italic 11.5px var(--serif); pointer-events: none; text-anchor: middle;
  paint-order: stroke; stroke: rgba(16,17,15,.85); stroke-width: 3px;
}

.landmark { cursor: pointer; }
.landmark-label {
  font: 11px var(--sans); fill: var(--ink-dim); pointer-events: none;
  paint-order: stroke; stroke: rgba(16,17,15,.9); stroke-width: 3px;
}
.landmark:hover + .landmark-label, .landmark.selected + .landmark-label { fill: #fff; }

.path-line { fill: none; cursor: pointer; }
.path-label {
  font: italic 11.5px var(--serif); pointer-events: none;
  paint-order: stroke; stroke: rgba(16,17,15,.85); stroke-width: 3px;
}
.waypoint-label {
  font: 10px var(--sans); fill: var(--ink-dim); pointer-events: none;
  paint-order: stroke; stroke: rgba(16,17,15,.9); stroke-width: 2.5px;
}

.selected-outline { stroke: #fff; stroke-width: 1.5; stroke-dasharray: 4 3; fill: none; pointer-events: none; }

/* disagreements */
.disagree-pulse { fill: none; stroke: #ef715d; stroke-width: 1.5; opacity: .72; stroke-dasharray: 2 2; }
.disagree-label { fill: #ff8a80; font-weight: 600; }
.badge-disagree { border-color: #ff5252 !important; color: #ff8a80 !important; }
#info-panel .claim { padding: 8px 10px; margin: 6px 0; background: var(--bg-panel-2); }
#info-panel .claimA { border-left: 3px solid #ffd166; }
#info-panel .claimB { border-left: 3px solid #64b5f6; }
#info-panel .claim-head { font-weight: 700; font-size: 12px; letter-spacing: .04em; margin-bottom: 3px; }
#info-panel .claimA .claim-head { color: #ffd166; }
#info-panel .claimB .claim-head { color: #64b5f6; }

/* ---------- info panel ---------- */
#info-panel { font-size: 12.5px; }
#info-panel .kind-badge {
  display: inline-block; font: 600 9px var(--mono); letter-spacing: .1em; text-transform: uppercase;
  padding: 2px 0 3px; margin-bottom: 9px;
  background: none; color: var(--signal); border-bottom: 1px solid var(--signal);
}
#info-panel h3 { font: 500 20px/1.18 var(--sans); letter-spacing: -.02em; margin: 0 0 4px; color: var(--ink); }
#info-panel .tagline { font-style: italic; color: var(--ink-dim); margin: 0 0 15px; font-family: var(--serif); font-size: 13px; }
#info-panel .desc { color: var(--ink); }
#info-panel .desc p { margin: 0 0 10px; }
#info-panel h4 {
  font: 600 9.5px var(--mono); text-transform: uppercase; letter-spacing: .09em;
  color: var(--ink-faint); margin: 18px 0 7px; border-top: 1px solid var(--line); padding-top: 11px;
}
#info-panel .eq {
  font-family: var(--mono); font-size: 12.5px; color: var(--accent);
  background: var(--bg-panel-2); border-left: 2px solid #5b604f;
  padding: 6px 9px; margin: 5px 0; overflow-x: auto; white-space: nowrap;
}
#info-panel ul { margin: 4px 0; padding-left: 18px; color: var(--ink); }
#info-panel li { margin: 3px 0; }
#info-panel .chip {
  display: inline-block; background: var(--bg-panel-2); border: 1px solid var(--line);
  padding: 2px 7px; margin: 2px 3px 2px 0; font-size: 10.5px; color: var(--ink-dim);
}
#info-panel .xlink { color: #7fb3ff; cursor: pointer; text-decoration: underline dotted; }
#info-panel .values { font-family: var(--mono); font-size: 12px; color: var(--accent); }
#info-panel .fail { border-left: 3px solid #e5533d; padding-left: 10px; color: var(--ink); }
#info-panel .crossing { border-left: 3px solid var(--accent); padding-left: 10px; color: var(--ink); }
#info-panel .note { color: var(--ink-dim); font-size: 12px; }
#info-panel em { font-family: var(--serif); }

@media (max-width: 1100px) {
  #layout { grid-template-columns: 200px 1fr 280px; }
  #topbar { grid-template-columns: 200px minmax(0, 1fr); }
  #map-tabs { gap: 11px; }
  .map-tab { font-size: 10.5px; }
}

@media (max-width: 1000px) {
  #layout { grid-template-columns: minmax(0, 1fr) 280px; }
  #side-left { display: none; }
  #topbar { grid-template-columns: 170px minmax(0, 1fr); }
}

@media (max-width: 720px) {
  body { overflow: auto; }
  #topbar { display: block; }
  #map-tabs { margin-top: 13px; }
  #layout { grid-template-columns: 1fr; grid-template-rows: minmax(620px, 72vh) auto; min-height: 0; }
  #stage { min-height: 620px; }
  #side-right {
    display: block; border-left: 0; border-top: 1px solid var(--line);
    overflow: visible; padding: 20px 18px 32px;
  }
}