:root{
  --bg:#ffffff;
  --text:#111111;
  --muted:#5f6973;
  --panel:#f6f8fa;
  --panel-strong:#e8f2ff;
  --border:#cad3dd;
  --accent:#1769aa;
  --accent-text:#ffffff;
  --warn:#fff4cc;
  --danger:#ffe1e1;
  --tap:44px;
}

/* ---------- base + dark mode ---------- */
body{
  background-color:var(--bg);
  color:var(--text);
  margin:0;
}

body.dark-mode{
  --bg:#000000;
  --text:#EEFFFF;
  --muted:#b8c4cf;
  --panel:#14191f;
  --panel-strong:#1d2a36;
  --border:#334250;
  --accent:#89DDFF;
  --accent-text:#001018;
  --warn:#3d3312;
  --danger:#3d1818;
}

/* make all SVG text (axis labels, etc.) inherit the current text color */
svg text{
  fill:currentColor;
}

/* ---------- existing UI styles ---------- */
ul#navbar{
  list-style-type:none;
  margin:0;
  padding:0;
  overflow:hidden;
  background-color:#2B2B2B;
  font-family:-apple-system,system-ui,BlinkMacSystemFont,Arial,serif;
}

div#sidebar label{
  font-family:-apple-system,system-ui,BlinkMacSystemFont,Arial,serif;
  margin:3px;
}

#main-div{
  display:flex;
  align-items:flex-start;
}

#sidebar{
  flex:0 0 190px;
  padding:8px;
  position:sticky;
  top:0;
  background:var(--bg);
  z-index:3;
}

#sidebar label{
  display:block;
  margin-bottom:8px;
}

#sidebar select,
#sidebar input,
button{
  min-height:var(--tap);
}

#content{
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  padding:8px;
}

ul#navbar>li{ float:left; }

#nav-logo{
  text-align:center;
  height:32px;
  display:block;
  margin:0 auto;
  padding:8.5px 0 8.5px 8.5px;
}

ul#navbar>li>a{
  display:block;
  color:#EEFFFF;
  text-align:center;
  padding:14px 16px;
  text-decoration:none;
}

ul#navbar>li>label{
  display:block;
  color:#EEFFFF;
  text-align:center;
  padding:14px 16px;
  cursor:pointer;
}

ul#navbar>li>label:hover,
ul#navbar>li>a:hover{
  background-color:#616161;
}

ul#navbar>li>label>input{ margin-left:4px; }

ul#navbar>li>a.link-tab{ color:#89DDFF; }
ul#navbar>li>a#todo-list{ color:#F07178; }

.new-tag{
  color:#FFCB6B;
  font-size:10px;
  vertical-align:text-top;
}

.data-status,
.ground-rb-home,
.source-card,
.vehicle-detail,
.vehicle-compare{
  border:1px solid var(--border);
  background:var(--panel);
  color:var(--text);
  border-radius:8px;
  margin:0 0 12px;
  padding:12px;
}

.data-status{
  display:flex;
  flex-wrap:wrap;
  gap:8px 12px;
  align-items:center;
  background:var(--panel-strong);
}

.data-status strong{
  color:var(--accent);
}

.data-status small{
  color:var(--muted);
}

.data-status.is-error{
  background:var(--danger);
}

.ground-rb-home{
  max-width:1180px;
}

.ground-rb-filters{
  position:sticky;
  top:0;
  z-index:2;
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:8px;
  padding:10px;
}

.ground-rb-filters summary{
  cursor:pointer;
  font-weight:700;
  min-height:var(--tap);
  display:flex;
  align-items:center;
}

.ground-rb-intro p,
.source-card p,
.data-caveat{
  color:var(--muted);
  line-height:1.45;
}

.preset-bar,
.search-memory span,
.detail-actions{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

button,
.ground-rb-results button{
  border:1px solid var(--border);
  border-radius:6px;
  background:var(--bg);
  color:var(--text);
  padding:8px 10px;
  cursor:pointer;
  font:inherit;
}

.preset-bar button,
#copy-comparison{
  background:var(--accent);
  color:var(--accent-text);
  border-color:var(--accent);
}

.filter-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:10px;
  margin-top:10px;
}

.filter-grid label,
.search-label{
  display:flex;
  flex-direction:column;
  gap:4px;
  font-weight:600;
}

.filter-grid input,
.filter-grid select{
  min-height:var(--tap);
  border:1px solid var(--border);
  border-radius:6px;
  padding:6px 8px;
  background:var(--bg);
  color:var(--text);
  font:inherit;
}

.search-memory{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
  margin-top:10px;
}

.search-memory strong{
  display:block;
  margin-bottom:4px;
}

.ground-rb-results-wrap{
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  border:1px solid var(--border);
  border-radius:8px;
  background:var(--bg);
}

.ground-rb-results,
.compare-table{
  border-collapse:collapse;
  min-width:820px;
  width:100%;
}

.ground-rb-results th,
.ground-rb-results td,
.compare-table th,
.compare-table td{
  border-bottom:1px solid var(--border);
  padding:8px;
  text-align:left;
  white-space:nowrap;
}

.ground-rb-results th,
.compare-table th{
  background:var(--panel-strong);
  position:sticky;
  top:0;
}

.ground-rb-results tr.low-sample{
  background:var(--warn);
}

.ground-panels{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:12px;
  margin-top:12px;
}

.vehicle-detail h3,
.vehicle-compare h3,
.source-card h3{
  margin-top:0;
}

.vehicle-detail dl{
  display:grid;
  grid-template-columns:max-content minmax(0,1fr);
  gap:6px 12px;
}

.vehicle-detail dt{
  font-weight:700;
  color:var(--muted);
}

.source-card a{
  color:var(--accent);
}

svg{
  max-width:none;
}

@media (max-width:800px){
  ul#navbar>li{
    float:none;
  }

  ul#navbar>li>a,
  ul#navbar>li>label{
    text-align:left;
    min-height:var(--tap);
    box-sizing:border-box;
  }

  #main-div{
    display:block;
  }

  #sidebar{
    position:static;
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:8px;
  }

  #content{
    padding:8px 4px;
  }

  .ground-rb-filters{
    top:0;
  }

  .search-memory,
  .ground-panels{
    grid-template-columns:1fr;
  }

  .ground-rb-results,
  .compare-table{
    min-width:760px;
  }
}