:root {
  color-scheme: light;
  --parchment: #f7f3e9;
  --paper: #fffcf7;
  --ink: #2c2416;
  --ink-light: #665640;
  --sienna: #a0522d;
  --sienna-dark: #813e20;
  --line: #dbd1c0;
  --control-line: #b4a895;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 20px;
  --spacing-xl: 28px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--parchment);
  color: var(--ink);
  font: 14px/1.45 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  accent-color: var(--sienna);
  caret-color: var(--sienna-dark);
}
::selection { background: #e9c9a6; color: var(--ink); }
html { scrollbar-color: #a99a82 var(--parchment); scrollbar-width: thin; }
.container { max-width: 1440px; margin: 0 auto; padding: var(--spacing-xl); }
.header { margin-bottom: var(--spacing-lg); }
h1, h2, h3, p { margin: 0; }
h1 { font-size: 24px; font-weight: 600; line-height: 1.3; text-wrap: balance; }
.version { font-size: 14px; font-weight: 400; color: var(--ink-light); white-space: nowrap; }
.subtitle { margin-top: var(--spacing-xs); color: var(--ink-light); }
h2 { font-size: 16px; font-weight: 600; line-height: 1.4; }
h3 { font-size: 17px; font-weight: 500; }
.workspace { display: grid; grid-template-columns: 408px minmax(0, 1fr); gap: var(--spacing-lg); align-items: start; }
.panel { min-width: 0; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: var(--spacing-lg); }
.panel-header { margin-bottom: var(--spacing-md); }
.fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--spacing-md); }
.full-width { grid-column: 1 / -1; }
label { display: block; min-width: 0; position: relative; font-size: 13px; font-weight: 500; color: var(--ink-light); }
.unit { float: right; font-weight: 400; }
input, select, button { font: inherit; line-height: 1.4; }
input, select {
  display: block;
  width: 100%;
  min-width: 0;
  height: 34px;
  margin-top: var(--spacing-xs);
  padding: 0 var(--spacing-sm);
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--control-line);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}
select { padding-right: var(--spacing-xl); }
input::placeholder { color: #746650; opacity: 1; }
input:hover, select:hover { border-color: var(--ink-light); }
input:focus, select:focus { border-color: var(--sienna); }
input:focus-visible, select:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--sienna-dark); outline-offset: 3px;
}
input[type='file'] { height: 38px; padding: 3px; font-size: 13px; overflow: hidden; }
input[type='file']::file-selector-button {
  height: 30px;
  padding: 0 var(--spacing-sm);
  margin-right: var(--spacing-sm);
  background: #eee5d6;
  color: var(--ink);
  border: 0;
  border-radius: 2px;
  font: inherit;
  cursor: pointer;
}
input[type='color'] { cursor: pointer; padding: 3px; }
.appearance-fields { grid-template-columns: 64px minmax(0, 1fr) minmax(0, 1fr); }
.field-help, small { color: var(--ink-light); font-size: 12px; font-weight: 400; line-height: 1.5; }
small { display: block; margin-top: var(--spacing-xs); }
.field-help { margin-top: calc(-1 * var(--spacing-xs)); }
.settings-group { margin-top: var(--spacing-md); border-top: 1px solid var(--line); }
summary {
  padding: var(--spacing-md) 0;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  color: var(--ink);
}
summary::marker { color: var(--sienna); font-size: 11px; }
summary:hover { color: var(--sienna-dark); }
.settings-group[open] > .fields { padding-bottom: var(--spacing-sm); }
.settings-group + .settings-group { margin-top: 0; }
.actions { margin-top: var(--spacing-md); }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 6px var(--spacing-md);
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color .15s ease-out, border-color .15s ease-out;
}
.primary { width: 100%; height: 38px; background: var(--sienna); color: #fff; }
.primary:hover { background: var(--sienna-dark); }
.secondary { background: transparent; border-color: var(--control-line); color: var(--sienna-dark); white-space: nowrap; }
.secondary:hover { background: #f2e8da; border-color: var(--sienna); }
.button:disabled { background: #e8e0d0; color: var(--ink-light); border-color: transparent; cursor: not-allowed; }
.loading-status { margin-top: var(--spacing-sm); text-align: center; color: var(--ink-light); font-size: 13px; }
.alert { margin-bottom: var(--spacing-md); padding: var(--spacing-md); background: #faeae1; color: #78381f; border: 1px solid #c6a390; border-radius: 4px; overflow-wrap: anywhere; }
.preview-panel { position: sticky; top: var(--spacing-lg); }
.results-header { display: flex; justify-content: space-between; align-items: center; gap: var(--spacing-md); padding-bottom: var(--spacing-md); border-bottom: 1px solid var(--line); }
.empty-state { min-height: 500px; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: var(--spacing-md); padding: var(--spacing-xl); text-align: center; color: var(--ink-light); }
.empty-state svg { color: #9c8060; margin-bottom: var(--spacing-xs); }
.empty-state p { max-width: 36ch; }
.stats-text { margin-top: var(--spacing-md); color: var(--ink-light); font-size: 13px; font-variant-numeric: tabular-nums; }
.map-legend { display: flex; gap: var(--spacing-lg); margin: var(--spacing-sm) 0 var(--spacing-md); color: var(--ink-light); font-size: 12px; }
.map-legend > span { display: inline-flex; align-items: center; gap: var(--spacing-sm); }
.legend-line { display: inline-block; width: 20px; height: 0; border-top: 2px solid; }
.legend-guide { border-color: #a76c16; border-top-style: dashed; }
.legend-track { height: 2px; border: 0; background: #0000ff; }
#map { height: clamp(400px, 65vh, 680px); width: 100%; border: 1px solid var(--line); border-radius: 4px; }
#map-error { margin: var(--spacing-md) 0; }
.leaflet-container { background: #ece5d6; font-family: inherit; }
.leaflet-control-attribution { color: var(--ink-light); }

@media (max-width: 1000px) {
  .container { padding: var(--spacing-lg); }
  .workspace { grid-template-columns: minmax(300px, 360px) minmax(0, 1fr); gap: var(--spacing-md); }
  .panel { padding: var(--spacing-md); }
  .results-header { flex-wrap: wrap; }
}
@media (max-width: 760px) {
  .container { padding: var(--spacing-md); }
  .workspace { grid-template-columns: minmax(0, 1fr); }
  .preview-panel { position: static; }
  .header { margin-bottom: var(--spacing-md); }
  h1 { font-size: 22px; }
  .empty-state { min-height: 240px; padding: var(--spacing-lg); }
  #map { height: 360px; }
  input, select { height: 44px; font-size: 16px; }
  input[type='file'] { height: 44px; }
  input[type='file']::file-selector-button { height: 36px; }
  .button, summary { min-height: 44px; }
}
@media (pointer: coarse) {
  input, select, .button { min-height: 44px; }
  summary { min-height: 44px; }
}
@media (max-width: 360px) {
  .fields { grid-template-columns: minmax(0, 1fr); }
  .appearance-fields { grid-template-columns: 52px minmax(0, 1fr) minmax(0, 1fr); }
  .unit { float: none; margin-left: var(--spacing-xs); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}