:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --ink: #10151c;
  --ink-2: #48525f;
  --ink-3: #7b8694;
  --line: #e6eaef;
  --line-2: #d6dce4;
  --accent: #2563eb;
  --accent-soft: #eff4ff;
  --good: #0f9960;
  --warn-soft: #fff8e6;
  --warn-line: #f0dfb5;
  --warn-ink: #7a5308;
  --bad: #d33d33;
  --bad-soft: #fdefee;
  --r: 10px;
  --r-sm: 7px;
  --shadow: 0 1px 2px rgba(16, 21, 28, 0.05), 0 4px 12px rgba(16, 21, 28, 0.06);
  --shadow-lg: 0 2px 6px rgba(16, 21, 28, 0.10), 0 12px 28px rgba(16, 21, 28, 0.12);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font: 14px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  color: var(--ink);
  background: var(--bg);
}

#shell { display: flex; height: 100%; }

#panel {
  width: 388px;
  min-width: 388px;
  overflow-y: auto;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 22px 22px 32px;
}

#map { flex: 1; min-width: 0; position: relative; }

header h1 {
  margin: 0 0 18px;
  font-size: 20px;
  font-weight: 640;
  letter-spacing: -0.02em;
}

/* ------------------------------------------------------- map tool bar */
.toolbar {
  position: absolute;
  z-index: 500;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 3px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line-2);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}
.tool {
  position: relative;
  display: flex; align-items: center; gap: 6px;
  padding: 7px 12px;
  font: inherit; font-size: 13px; font-weight: 520;
  color: var(--ink-2);
  background: transparent; border: 0; border-radius: 8px;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
}
.tool:hover { background: #eef1f5; color: var(--ink); }
/* Hairline between the pan tool, the three shape tools and the start pin, so
   five buttons still read as three groups. */
.tool-sep {
  flex: 0 0 auto; align-self: stretch;
  width: 1px; margin: 3px 2px;
  background: var(--line-2);
}
.tool.active { background: var(--accent); color: #fff; }
.tool svg {
  width: 17px; height: 17px; flex: 0 0 auto;
  fill: none; stroke: currentColor; stroke-width: 1.7;
  stroke-linecap: round; stroke-linejoin: round;
}
.tool .check {
  width: 14px; height: 14px; stroke-width: 3;
  color: var(--good); margin-left: 1px;
}
.tool.active .check { color: #b6f5d5; }

/* ------------------------------------------------------------- start pin */
.start-pin svg {
  width: 60px; height: 60px;
  fill: var(--accent);
  stroke: #fff; stroke-width: 1.6;
  stroke-linejoin: round;
  filter: drop-shadow(0 2px 4px rgba(16, 21, 28, 0.35));
}
.start-pin circle { fill: #fff; stroke: none; }

/* ---------------------------------------------------------------- tiles */
.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.tiles + .tiles { margin-top: 8px; }
.tile {
  padding: 9px 11px;
  background: #f7f9fb;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  min-width: 0;
}
.tile.accent { background: var(--accent-soft); border-color: #dbe6fe; }
.tile-label {
  display: block; font-size: 10.5px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-3);
}
.tile-value {
  display: block; margin-top: 2px;
  font-size: 15px; font-weight: 560;
  font-variant-numeric: tabular-nums;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.tiles.four .tile-value { font-size: 17px; }
.muted { color: var(--ink-3); font-weight: 400; }

/* --------------------------------------------------------------- blocks */
.block { margin-top: 24px; }
.block h2 {
  margin: 0 0 12px;
  font-size: 11px; font-weight: 650;
  text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--ink-3);
}

.hint { margin: 10px 0 0; font-size: 12.5px; color: var(--ink-2); }

/* -------------------------------------------------------------- buttons */
.primary {
  display: block;
  width: 100%; margin-top: 22px; padding: 12px;
  font: inherit; font-size: 15px; font-weight: 580;
  color: #fff; background: var(--accent);
  border: 0; border-radius: var(--r);
  cursor: pointer; box-shadow: var(--shadow);
  transition: background 0.12s ease, opacity 0.12s ease;
}
.primary:hover:not(:disabled) { background: #1d4fd7; }
.primary:disabled { opacity: 0.4; cursor: not-allowed; box-shadow: none; }

/* --------------------------------------------------------------- inputs */
.field { display: block; }
.field + .field, .field + .switch, .segmented + .field { margin-top: 16px; }
.block > .field:not(:last-child) { margin-bottom: 16px; }
.field > span {
  display: block; font-size: 12px; color: var(--ink-2); margin-bottom: 5px;
}
.field input {
  width: 100%; font: inherit; padding: 8px 10px;
  color: var(--ink); background: #fff;
  border: 1px solid var(--line-2); border-radius: var(--r-sm);
  font-variant-numeric: tabular-nums;
}
.field input:focus {
  outline: 0; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}
.field input.invalid {
  border-color: var(--bad); box-shadow: 0 0 0 3px rgba(211, 61, 51, 0.12);
}

/* ---------------------------------------------------------- segmented */
.segmented {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3px;
  padding: 3px;
  background: #eef1f5; border-radius: var(--r-sm);
}
.segmented label { display: block; position: relative; cursor: pointer; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span {
  display: block; padding: 7px 6px; text-align: center;
  font-size: 13px; font-weight: 520; color: var(--ink-2);
  border-radius: 5px;
  transition: background 0.12s ease, color 0.12s ease, box-shadow 0.12s ease;
}
.segmented label:hover span { color: var(--ink); }
.segmented input:checked + span {
  background: #fff; color: var(--ink); font-weight: 580;
  box-shadow: 0 1px 2px rgba(16, 21, 28, 0.10);
}
.segmented input:focus-visible + span {
  box-shadow: 0 0 0 2px var(--accent);
}

/* --------------------------------------------------------------- switch */
.switch {
  display: flex; gap: 10px; align-items: center;
  margin-bottom: 16px; cursor: pointer; user-select: none;
}
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch .track {
  flex: 0 0 auto; position: relative;
  width: 36px; height: 21px; border-radius: 11px;
  background: #c8d0da; transition: background 0.16s ease;
}
.switch .track::after {
  content: ""; position: absolute; top: 3px; left: 3px;
  width: 15px; height: 15px; border-radius: 50%; background: #fff;
  transition: transform 0.16s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.22);
}
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(15px); }
.switch input:focus-visible + .track {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}
.switch-label { font-size: 13.5px; font-weight: 520; }

/* -------------------------------------------------------------- notices */
.warn, .error {
  padding: 10px 12px; border-radius: var(--r-sm);
  font-size: 12.5px; border: 1px solid;
}
.warn { margin-top: 10px; background: var(--warn-soft); border-color: var(--warn-line); color: var(--warn-ink); }
.error { margin-top: 12px; background: var(--bad-soft); border-color: #f6cdc9; color: var(--bad); }

/* ------------------------------------------------------------- progress */
.progress { margin-top: 14px; }
.bar { height: 5px; border-radius: 3px; background: #e6eaef; overflow: hidden; }
.fill {
  height: 100%; width: 0; border-radius: 3px;
  background: var(--accent); transition: width 0.3s ease;
}
.fill.indeterminate { width: 34%; animation: slide 1.15s ease-in-out infinite alternate; }
@keyframes slide { from { margin-left: 0; } to { margin-left: 66%; } }
.progress-text { margin-top: 7px; font-size: 12.5px; color: var(--ink-2); }

.hidden { display: none !important; }

.leaflet-container { background: #e7ebef; }

/* Leaflet gives every drawn path `cursor: pointer`, which would say "click me"
   right where you are trying to start the next shape. While a draw tool is
   active the whole map keeps the drawing cursor, paths included. */
#map.drawing,
#map.drawing .leaflet-container,
#map.drawing .leaflet-interactive { cursor: crosshair; }
#map.pinning,
#map.pinning .leaflet-container,
#map.pinning .leaflet-interactive { cursor: pointer; }
/* ... but the panels floating on top of the map are still controls. */
#map .toolbar, #map .legend { cursor: default; }
#map .tool, #map .legend-item { cursor: pointer; }

/* Keep Leaflet's own controls clear of the centred toolbar. */
.leaflet-top.leaflet-left { margin-top: 2px; }

/* -------------------------------------------------------------- route arrows */
/* Leaflet owns the marker element's transform for positioning, so the rotation
   has to go on something inside it. */
.route-arrow i {
  display: block;
  width: 14px; height: 14px;
  transform-origin: 50% 50%;
}
.route-arrow svg {
  width: 14px; height: 14px;
  fill: none; stroke: currentColor; stroke-width: 2.2;
  stroke-linecap: round; stroke-linejoin: round;
  filter: drop-shadow(0 0 1.5px rgba(255, 255, 255, 0.95));
}

/* ------------------------------------------------------------ session legend */
.legend {
  position: absolute;
  z-index: 500;
  top: 14px;
  right: 14px;
  width: 200px;
  max-height: calc(100% - 28px);
  padding: 4px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line-2);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}
.legend-item {
  display: flex; align-items: center; gap: 9px;
  width: 100%; padding: 6px 8px;
  font: inherit; text-align: left;
  color: var(--ink);
  background: transparent; border: 0; border-radius: 8px;
  transition: background 0.12s ease;
}
.legend-item:hover, .legend-item.active { background: #eef1f5; }
/* Pinned by a click, so it survives the pointer moving away. */
.legend-item.pinned { background: var(--accent-soft); }
.legend-item.pinned .legend-name { font-weight: 680; }
.legend-item:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.legend-item .swatch {
  flex: 0 0 auto;
  width: 11px; height: 11px; border-radius: 3px;
  box-shadow: inset 0 0 0 1px rgba(16, 21, 28, 0.18);
}
.legend-text { min-width: 0; }
.legend-name {
  display: block; font-size: 12.5px; font-weight: 480;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.legend-item.active .legend-name { font-weight: 680; }
.legend-meta {
  display: block; font-size: 11px; color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 860px) {
  #shell { flex-direction: column; }
  #panel {
    width: 100%; min-width: 0; border-right: 0;
    border-bottom: 1px solid var(--line); max-height: 56%;
  }
  #map { min-height: 44vh; }
  .toolbar { top: 10px; }
  .tool span { display: none; }
  .tool { padding: 8px 10px; }
  .tool-sep { margin: 3px 0; }
  /* Below the toolbar rather than beside it - there is no room for both. */
  .legend { top: 56px; right: 10px; width: 168px; max-height: calc(100% - 70px); }
}