/* Palette per dataviz reference (light/dark selected, not flipped) */
:root {
  color-scheme: light;
  --surface-1: #fcfcfb;
  --page: #f9f9f7;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;
  --series-2: #eb6834;
  --series-3: #1baf7a;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --surface-1: #1a1a19;
    --page: #0d0d0d;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
    --series-2: #d95926;
    --series-3: #199e70;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--page);
  color: var(--text-primary);
  font-size: 14px;
}

#layout { display: flex; height: 100vh; }

#sidebar {
  width: 320px;
  flex: none;
  overflow-y: auto;
  background: var(--surface-1);
  border-right: 1px solid var(--border);
  padding: 16px;
}
#sidebar h1 { font-size: 20px; margin: 0 0 2px; }
.tagline { color: var(--text-secondary); margin: 0 0 14px; font-size: 12.5px; }
#sidebar section { border-top: 1px solid var(--grid); padding: 12px 0; }
#sidebar h2 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted); margin: 0 0 8px; font-weight: 600;
}

.field { display: block; margin: 8px 0; color: var(--text-secondary); }
.field select, .field input[type="range"] { width: 100%; margin-top: 4px; }
.field select {
  background: var(--surface-1); color: var(--text-primary);
  border: 1px solid var(--baseline); border-radius: 6px; padding: 5px 6px;
}
#dist-val { float: right; color: var(--text-primary); font-weight: 600; }

.row { display: flex; gap: 8px; }
.seg { border: 1px solid var(--baseline); border-radius: 8px; overflow: hidden; }
.seg-btn {
  flex: 1; padding: 7px 0; border: none; background: transparent;
  color: var(--text-secondary); cursor: pointer; font: inherit;
}
.seg-btn.active { background: var(--series-1); color: #fff; }

.tool-btn, .primary {
  font: inherit; cursor: pointer; border-radius: 8px;
  border: 1px solid var(--baseline);
  background: var(--surface-1); color: var(--text-primary);
  padding: 7px 10px;
}
.tool-btn:hover { border-color: var(--text-muted); }
.tool-btn.active { outline: 2px solid var(--series-1); }
.primary {
  width: calc(100% - 90px); background: var(--series-1); color: #fff;
  border: none; font-weight: 600; padding: 10px;
}
.primary:disabled { opacity: 0.5; cursor: default; }
#btn-shuffle { width: 80px; margin-left: 6px; }

.hint { color: var(--text-muted); font-size: 12px; margin: 6px 0; }

.chips { display: flex; flex-wrap: wrap; gap: 4px 10px; margin-bottom: 8px; }
.chips label { color: var(--text-secondary); white-space: nowrap; }

#via-list { list-style: none; padding: 0; margin: 6px 0 0; }
#via-list li {
  display: flex; align-items: center; gap: 6px; padding: 3px 0;
  color: var(--text-secondary);
}
#via-list button { margin-left: auto; }

#results { margin-top: 10px; }
.route-card {
  border: 1px solid var(--grid); border-radius: 10px; padding: 10px;
  margin-bottom: 8px; cursor: pointer;
}
.route-card:hover { border-color: var(--text-muted); }
.route-card.selected { border-color: var(--series-1); outline: 1px solid var(--series-1); }
.route-card .rc-head { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.rc-key { width: 14px; height: 3px; border-radius: 2px; flex: none; }
.rc-stats { color: var(--text-secondary); font-size: 12.5px; margin-top: 4px; }
.rc-bars { margin-top: 6px; }
.rc-bar-row { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--text-muted); margin: 2px 0; }
.rc-bar-row .bar-label { width: 74px; flex: none; }
.rc-bar-track { flex: 1; height: 5px; border-radius: 3px; background: var(--grid); overflow: hidden; }
.rc-bar-fill { height: 100%; border-radius: 3px; background: var(--series-1); }
.rc-bar-row .bar-val { width: 34px; text-align: right; color: var(--text-secondary); }

#main { flex: 1; position: relative; display: flex; flex-direction: column; }
#map { flex: 1; background: var(--page); }

#heat-ctl {
  position: absolute; top: 10px; left: 54px; z-index: 900;
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 10px; display: flex; gap: 8px; align-items: center;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
#heat-ctl label { color: var(--text-secondary); }
#heat-opacity { width: 90px; }

#chart-panel {
  height: 220px; flex: none; background: var(--surface-1);
  border-top: 1px solid var(--border); display: flex; flex-direction: column;
}
#chart-panel.hidden { display: none; }
#chart-head {
  display: flex; align-items: center; gap: 12px; padding: 8px 14px 0;
}
#chart-title { font-weight: 600; }
#chart-stats { color: var(--text-secondary); font-size: 12.5px; flex: 1; }
#chart-close {
  border: none; background: none; color: var(--text-muted);
  font-size: 18px; cursor: pointer; padding: 0 4px;
}
#chart { flex: 1; position: relative; padding: 4px 8px 6px; }
#chart svg { display: block; width: 100%; height: 100%; }

.viz-tooltip {
  position: absolute; pointer-events: none; z-index: 950;
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: 6px; padding: 5px 8px; font-size: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.18); white-space: nowrap;
}
.viz-tooltip .tt-value { font-weight: 600; color: var(--text-primary); }
.viz-tooltip .tt-label { color: var(--text-secondary); }

.poi-popup { font-family: inherit; }
.poi-popup .pp-name { font-weight: 600; margin-bottom: 2px; }
.poi-popup .pp-type { color: var(--text-muted); font-size: 11.5px; margin-bottom: 6px; }

.leaflet-container { font: inherit; }
.marker-label { font-weight: 700; color: #fff; }

/* current-location indicator */
.loc-dot {
  position: relative; width: 14px; height: 14px; border-radius: 50%;
  background: #2a78d6; border: 2.5px solid #fff;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.45);
}
.loc-dot::after {
  content: ''; position: absolute; inset: -3px; border-radius: 50%;
  border: 2px solid #2a78d6;
  animation: locpulse 2.2s ease-out infinite;
}
@keyframes locpulse {
  0%   { transform: scale(1);   opacity: 0.8; }
  70%  { transform: scale(2.6); opacity: 0; }
  100% { transform: scale(2.6); opacity: 0; }
}
.locate-btn { font-size: 17px; line-height: 26px; }