/* GPS Triangulator (information-technology/gps.php). The page chrome is the one-screen layout in /css/resource.css.
   On a laptop or desktop: the map fills the height on the left, the signals and settings are on the right (scrolling
   inside themselves if they must); on smaller screens they stack and the page scrolls. Theme tokens only: the map's
   own colours (the sea, the land, each satellite's circle) are named below. */

:root{
  --gps-sea:var(--map-sea);--gps-land:var(--map-land);--gps-coast:var(--map-coast);--gps-city:var(--muted);
  --gps-s1:var(--viz-2);--gps-s2:var(--viz-1);--gps-s3:var(--viz-3);--gps-s4:var(--viz-4);
  --gps-unc:var(--viz-2);--gps-fix:var(--viz-5);   /* the uncertainty area is drawn at 80% */
}

.objective h4{margin:14px 0 6px;font:700 14px/1.2 var(--font-display);color:var(--ink)}
.rp-main{gap:10px}
.panel h2{margin:0 0 8px}   /* the rest is css/resource.css */
.seg-toggle.is-off{opacity:.45;pointer-events:none}

.gps-stage{flex:1;min-height:0;display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,380px);gap:12px}
.gps-mapbox{display:flex;flex-direction:column;min-height:0;min-width:0;padding:8px}
.gps-svgbox{flex:1;min-height:0;display:flex;align-items:center;justify-content:center}
.gps-svgbox svg{display:block;width:100%;height:100%;border-radius:6px;touch-action:pan-y;user-select:none;-webkit-user-select:none}
.gps-legend{flex:none;margin:6px 4px 0;display:flex;flex-wrap:wrap;gap:4px 16px;font-size:12.5px;color:var(--ink-soft)}
.gps-legend span{display:inline-flex;align-items:center;gap:6px}
.gps-legend .sw{display:inline-block;width:12px;height:12px;border-radius:50%}
.gps-legend .sat{background:var(--gps-s2)}
.gps-legend .rx{background:var(--ink);border-radius:3px}
.gps-legend .fix{background:transparent;border:2.5px solid var(--gps-fix)}
.gps-legend .unc{background:var(--gps-unc);opacity:.8;border-radius:3px}

/* the map's parts */
.gps-sea{fill:var(--gps-sea)}
.gps-land{fill:var(--gps-land);stroke:var(--gps-coast);stroke-linejoin:round}
.gps-city{fill:var(--gps-city)}
.gps-cityname{fill:var(--gps-city);font-family:var(--font-body)}
.gps-circle{fill:none}
.gps-band{stroke-opacity:.15}
.gps-sat{cursor:grab;touch-action:none}
.gps-sat .body{stroke:var(--panel)}
.gps-sat .panelwing{fill:var(--ink-soft)}
.gps-sat text{fill:var(--on-viz);font-family:var(--font-display);font-weight:700;text-anchor:middle;pointer-events:none}
.gps-rx{cursor:grab;touch-action:none}
.gps-rx .phone{fill:var(--ink);stroke:var(--panel)}
.gps-rx .screen{fill:var(--accent-tint)}
.gps-unc{fill:var(--gps-unc);fill-opacity:.8}
.gps-fix{fill:none;stroke:var(--gps-fix)}
.gps-cand{fill:var(--panel);stroke:var(--ink);stroke-dasharray:4 3}
.gps-cand-q{fill:var(--ink);font-family:var(--font-display);font-weight:700;text-anchor:middle}
.gps-label{fill:var(--ink);font-family:var(--font-body);paint-order:stroke;stroke:var(--gps-sea);stroke-linejoin:round}
.gps-scale{stroke:var(--ink-soft)}
.gps-scaletext{fill:var(--ink-soft);font-family:var(--font-mono)}

/* the side panel */
.gps-side{min-height:0;min-width:0;overflow:auto;padding:12px 14px;display:flex;flex-direction:column;gap:12px}
.gps-say{padding:10px 12px;border-radius:8px;background:var(--paper);border:1px solid var(--line);border-left:3px solid var(--accent);font-size:14px;line-height:1.5;color:var(--ink-soft)}
.gps-say b{color:var(--ink)}
.gps-say.warn{border-left-color:var(--warn)}
.gps-say.ok{border-left-color:var(--ok)}
table.gps-table{width:100%;border-collapse:collapse;font-size:13px}
table.gps-table th{font:600 10.5px/1.2 var(--font-display);text-transform:uppercase;letter-spacing:.05em;color:var(--muted);padding:4px 6px;text-align:left;border-bottom:1px solid var(--line)}
table.gps-table td{padding:5px 6px;border-bottom:1px solid var(--line);font-family:var(--font-mono);font-size:12.5px;white-space:nowrap}
table.gps-table td:first-child{font-family:var(--font-display);font-weight:700}
table.gps-table .dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px;vertical-align:-1px}
table.gps-table .dot.s1{background:var(--gps-s1)}
table.gps-table .dot.s2{background:var(--gps-s2)}
table.gps-table .dot.s3{background:var(--gps-s3)}
table.gps-table .dot.s4{background:var(--gps-s4)}
.gps-field{display:flex;flex-direction:column;gap:5px}
.gps-field label,.gps-group{font:600 11px/1.2 var(--font-display);color:var(--muted);text-transform:uppercase;letter-spacing:.06em;display:flex;justify-content:space-between;gap:8px}
.gps-field label .num{font-family:var(--font-mono);text-transform:none;letter-spacing:0;color:var(--ink)}
.gps-field input[type=range]{width:100%;accent-color:var(--accent);min-height:30px;margin:0}
.gps-field .btn{align-self:flex-start}
.gps-btns{display:flex;flex-wrap:wrap;gap:6px}
.gps-btns .btn{white-space:normal;text-align:left}
.gps-switch{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink);cursor:pointer;background:none;border:1px solid var(--line-strong);border-radius:8px;padding:7px 12px;min-height:40px;text-align:left}
.gps-switch .track{width:40px;height:22px;border-radius:11px;background:var(--panel-2);border:1px solid var(--line-strong);position:relative;flex:none;transition:background .18s}
.gps-switch .track::after{content:"";position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:var(--muted);transition:left .18s,background .18s}
.gps-switch[aria-pressed="true"] .track{background:var(--accent-tint);border-color:var(--accent)}
.gps-switch[aria-pressed="true"] .track::after{left:20px;background:var(--accent)}
.gps-switch:disabled{opacity:.45;cursor:default}
.gps-switch:focus-visible{outline:2px solid var(--focus);outline-offset:1px}

/* uses */
.gps-uses{flex:1;min-height:0;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:12px}
.gps-cards,.gps-compare{min-height:0;overflow:auto;padding:12px 14px}
.gps-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.gps-grid article{background:var(--panel-2);border:1px solid var(--line);border-radius:8px;padding:10px 12px}
.gps-grid h3{margin:0 0 4px;font:700 14.5px/1.25 var(--font-display);color:var(--accent-deep)}
.gps-grid p{margin:0;font-size:13.5px;line-height:1.45;color:var(--ink-soft)}
table.gps-cmp{width:100%;border-collapse:collapse;font-size:13.5px;margin-bottom:10px}
table.gps-cmp th,table.gps-cmp td{padding:7px 8px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left;line-height:1.4}
table.gps-cmp thead th{font:700 12px/1.2 var(--font-display);color:var(--ink);text-transform:none;letter-spacing:0;background:var(--panel-2)}
table.gps-cmp th[scope=row]{font:600 12.5px/1.3 var(--font-display);color:var(--muted);width:22%}
.gps-quiz{flex:1;min-height:0;display:flex;flex-direction:column}
.gps-quiz .cq{flex:1}

@media (min-width:901px) and (max-width:1150px){
  .gps-stage{grid-template-columns:minmax(0,1fr) 320px}
  .gps-grid{grid-template-columns:1fr}
}
@media (max-width:900px){
  .gps-stage,.gps-uses{display:flex;flex-direction:column}
  .gps-svgbox{flex:none}
  .gps-svgbox svg{height:auto;aspect-ratio:1/1.05}
  .gps-side,.gps-cards,.gps-compare{overflow:visible}
  .btn,.seg-toggle button{min-height:40px}
  .gps-field input[type=range]{min-height:40px}
  .gps-switch{min-height:44px}
  .gps-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .rp-main{padding-left:10px;padding-right:10px}
  .gps-mapbox{padding:4px}
  table.gps-cmp{font-size:13px}
}
@media (prefers-reduced-motion:reduce){.gps-switch .track,.gps-switch .track::after{transition:none}}