:root { color-scheme: dark; }

* { box-sizing: border-box; }

html, body {
  overscroll-behavior: none;          /* no pull-to-refresh fighting the map */
}

body {
  margin: 0;
  background: #05070d;
  color: #dfe6f2;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

header {
  padding: 12px 16px;
  border-bottom: 1px solid #1b2438;
}

h1 {
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: 0.5px;
}

/* --- controls ---------------------------------------------------------- */

#controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: flex-end;
}

#controls label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1 1 200px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #8b97ad;
}

#controls input {
  width: 100%;
  min-width: 0;
  background: #0d1322;
  border: 1px solid #26324a;
  border-radius: 6px;
  color: #dfe6f2;
  padding: 9px 10px;
  font-size: 16px;               /* >=16px stops iOS zoom-on-focus */
}

#controls button {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 8px 20px;
  background: #2d5bd7;
  border: 0;
  border-radius: 6px;
  color: #fff;
  font-size: 15px;
  cursor: pointer;
}

#controls button:hover { background: #3d6bea; }

#status {
  flex-basis: 100%;
  font-size: 13px;
  color: #8b97ad;
}

#status.error { color: #ff8f8f; }

/* --- map -------------------------------------------------------------- */

#celestial-map {
  display: block;
  width: 100%;
  max-width: 960px;
  min-width: 0 !important;         /* override vendor min-width: 720px */
  margin: 0 auto;
  overflow: hidden;
  touch-action: none;             /* let d3 own drag/pinch on the canvas */
}

#celestial-map canvas {
  display: block;
  max-width: 100%;
  margin: 0 auto;
  touch-action: none;
}

/* bigger, theme-matched zoom buttons for touch */
#celestial-zoomin,
#celestial-zoomout {
  width: 40px !important;
  height: 40px !important;
  font-size: 26px !important;
  line-height: 38px !important;
  color: #e7ecf6 !important;
  background: rgba(10, 15, 28, 0.6) !important;
  border: 1px solid #3a4a6a !important;
}
#celestial-zoomin  { top: 12px !important; }
#celestial-zoomout { top: 58px !important; }

/* --- display settings (collapsible) --------------------------------- */

#settings {
  margin: 8px 16px;
  border: 1px solid #1b2438;
  border-radius: 6px;
}

#settings summary {
  padding: 9px 12px;
  cursor: pointer;
  color: #8fa8e0;
  font-size: 14px;
  list-style: none;
}

#settings summary::-webkit-details-marker { display: none; }
#settings summary::before { content: "\25B8  "; }
#settings[open] summary::before { content: "\25BE  "; }
#settings[open] summary { border-bottom: 1px solid #1b2438; }

#celestial-form {
  padding: 10px;
  max-width: 100%;
  overflow-x: auto;               /* vendor form has fixed-width rows */
  -webkit-overflow-scrolling: touch;
}

/* --- footer -------------------------------------------------------- */

footer {
  padding: 10px 16px;
  font-size: 12px;
  color: #6b7688;
  border-top: 1px solid #1b2438;
}

footer a { color: #8fa8e0; }

/* --- narrow screens ---------------------------------------------------- */

@media (max-width: 600px) {
  header { padding: 10px 12px; }
  #settings { margin: 8px 12px; }
  footer { padding: 10px 12px; }
  #controls button { flex: 1 1 100%; }
}