:root {
  --accent: #4f6df5;
  --accent-soft: rgba(79, 109, 245, 0.15);
  --danger: #dc2626;
  --green: #16a34a;
  --panel-bg: rgba(255, 255, 255, 0.92);
  --text: #1a1f36;
  --muted: #6b7280;
  --border: rgba(0, 0, 0, 0.08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body, #root { height: 100%; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }

#app { position: relative; width: 100%; height: 100vh; overflow: hidden; }
#map { position: absolute; inset: 0; z-index: 1; background: #aadaff; }

#panel, #layers-panel {
  position: absolute; top: 16px; left: 16px; z-index: 1000;
  width: 312px; max-width: calc(100% - 32px);
  background: var(--panel-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border); border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18); color: var(--text); overflow: hidden;
  max-height: calc(100vh - 32px); display: flex; flex-direction: column;
}
#layers-panel { top: 78px; right: 16px; left: auto; max-height: calc(100vh - 94px); }

#panel-header, #layers-header { display: flex; align-items: center; gap: 10px; padding: 14px 16px; flex-shrink: 0; cursor: grab; user-select: none; touch-action: none; }
#panel.panel-dragging #panel-header, #layers-panel.panel-dragging #layers-header { cursor: grabbing; }
#panel-header svg, #layers-header svg { color: var(--accent); flex-shrink: 0; }
#panel-header h1, .layers-title { font-size: 15px; font-weight: 650; letter-spacing: -0.2px; }
#collapse-btn, #layers-collapse-btn {
  margin-left: auto; border: none; background: var(--accent-soft); color: var(--accent);
  width: 26px; height: 26px; border-radius: 8px; cursor: pointer; font-size: 16px; line-height: 1;
  display: grid; place-items: center; transition: background 0.15s;
}
#collapse-btn:hover, #layers-collapse-btn:hover { background: rgba(79, 109, 245, 0.28); }

#panel-body { padding: 0 16px 16px; display: flex; flex-direction: column; gap: 14px; overflow-y: auto; }
#layers-panel-body { padding: 0 16px 16px; overflow-y: auto; }
#panel.collapsed #panel-body, #layers-panel.collapsed #layers-panel-body { display: none; }

/* The mode tabs are links (one endpoint per mode), hence the anchor resets. */
#mode-toggle { display: flex; gap: 3px; background: rgba(0,0,0,0.05); border-radius: 11px; padding: 3px; }
.seg-btn { flex: 1; display: block; text-align: center; text-decoration: none; border: none; background: transparent; color: var(--muted); padding: 8px; font-size: 13px; font-weight: 550; border-radius: 8px; cursor: pointer; transition: all 0.15s; }
.seg-btn.active { background: #fff; color: var(--accent); font-weight: 650; box-shadow: 0 1px 3px rgba(0,0,0,0.12); }

.field-label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.6px; color: var(--muted); margin-bottom: 7px; }

.radius-row { display: flex; gap: 8px; }
.radius-row input[type="number"], .radius-row input[type="text"] { flex: 1; min-width: 0; padding: 9px 11px; font-size: 14px; border: 1px solid var(--border); border-radius: 10px; background: #fff; color: var(--text); outline: none; transition: border-color 0.15s, box-shadow 0.15s; }
.radius-row input[type="number"]:focus, .radius-row input[type="text"]:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
#airport-input { letter-spacing: 1px; font-weight: 600; }
.radius-row select { padding: 9px 8px; font-size: 14px; border: 1px solid var(--border); border-radius: 10px; background: #fff; color: var(--text); cursor: pointer; outline: none; }
.unit-suffix { display: flex; align-items: center; padding: 0 10px; font-size: 14px; font-weight: 600; color: var(--muted); }

/* Glider: auto ground-elevation readout */
.ground-readout { padding: 9px 11px; font-size: 14px; font-weight: 600; border: 1px solid var(--border); border-radius: 10px; background: rgba(0,0,0,0.025); color: var(--text); font-variant-numeric: tabular-nums; }

/* Glider: wind-direction dial + speed */
.wind-block { display: flex; gap: 12px; align-items: center; }
.wind-dial-col { display: flex; flex-direction: column; align-items: center; gap: 5px; flex-shrink: 0; }
.wind-speed-col { flex: 1; min-width: 0; }
.wind-dial { position: relative; width: 92px; height: 92px; flex-shrink: 0; border-radius: 50%; border: 1px solid var(--border); background: radial-gradient(circle at 50% 50%, #fff 0%, rgba(0,0,0,0.03) 100%); cursor: grab; touch-action: none; user-select: none; }
.wind-dial:active { cursor: grabbing; }
.wind-tick { position: absolute; font-size: 9px; font-weight: 700; color: var(--muted); transform: translate(-50%, -50%); z-index: 1; }
.wind-tick.wt-n { left: 50%; top: 9px; }
.wind-tick.wt-s { left: 50%; top: calc(100% - 9px); }
.wind-tick.wt-e { left: calc(100% - 9px); top: 50%; }
.wind-tick.wt-w { left: 9px; top: 50%; }
.wind-arrow { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.wind-dir-readout { font-size: 11px; font-weight: 700; color: var(--text); font-variant-numeric: tabular-nums; }

/* Glider: aerodynamic-quality direct/polar toggle + polar chart */
.q-toggle { display: flex; gap: 3px; background: rgba(0,0,0,0.05); border-radius: 9px; padding: 3px; }
.q-toggle .seg-btn { padding: 6px; font-size: 12px; }
.polar-chart { margin-top: 8px; border: 1px solid var(--border); border-radius: 10px; background: rgba(0,0,0,0.02); padding: 4px; overflow: hidden; cursor: grab; touch-action: none; }
.polar-chart:active { cursor: grabbing; }
#glide-degrade-val { color: var(--accent); font-weight: 700; font-variant-numeric: tabular-nums; }
.polar-chart .polar-svg { display: block; }
input[type="range"] { width: 100%; accent-color: var(--accent); cursor: pointer; margin-top: 10px; }

/* Ranges-mode regime inputs & colour swatches */
.range-swatch { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }
.range-swatch.rng-max { background: #dc2626; }
.range-swatch.rng-opt { background: #4f6df5; }
.range-swatch.rng-end { background: #16a34a; }
.rng-cons-unit { display: flex; align-items: center; font-size: 13px; color: var(--muted); white-space: nowrap; }
.radius-row .rng-speed, .radius-row .rng-cons { flex: 1; min-width: 0; }

/* Flight-time label on each range circle */
.range-time { display: flex; align-items: center; justify-content: center; font: 700 10px/1 -apple-system, sans-serif; background: rgba(255,255,255,0.92); border: 1px solid var(--border, rgba(0,0,0,0.15)); border-radius: 5px; padding: 1px 4px; white-space: nowrap; box-shadow: 0 1px 2px rgba(0,0,0,0.25); pointer-events: none; font-variant-numeric: tabular-nums; }
.range-time.rng-max { color: #dc2626; }
.range-time.rng-opt { color: #4f6df5; }
.range-time.rng-end { color: #16a34a; }

.presets { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.preset, .chip { border: 1px solid var(--border); background: #fff; color: var(--muted); font-size: 12px; padding: 5px 9px; border-radius: 8px; cursor: pointer; transition: all 0.12s; font-weight: 550; }
.preset:hover, .chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.nav-toggle { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 550; cursor: pointer; }
.nav-toggle input { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; }
.layer-group-label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.4px; color: var(--muted); margin-bottom: 5px; }
.layer-row { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 4px; }

.stats { background: rgba(0,0,0,0.025); border-radius: 12px; padding: 12px; display: flex; flex-direction: column; gap: 8px; }
.stat-line { display: flex; justify-content: space-between; align-items: baseline; font-size: 12.5px; gap: 8px; }
.stat-line .k { color: var(--muted); white-space: nowrap; }
.stat-line .v { font-weight: 600; font-variant-numeric: tabular-nums; text-align: right; }

#current-radius { background: var(--accent-soft); border: 1px solid rgba(79,109,245,0.25); border-radius: 12px; padding: 12px 14px; display: flex; flex-direction: column; gap: 1px; }
.cr-label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.6px; color: var(--accent); }
.cr-value { font-size: 24px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; letter-spacing: -0.5px; }
.cr-sub { font-size: 12px; font-weight: 600; color: rgba(79,109,245,0.85); font-variant-numeric: tabular-nums; }

.note { font-size: 11.5px; line-height: 1.5; color: var(--muted); }
.note b { color: var(--text); font-weight: 600; }

.btn-row { display: flex; gap: 8px; }
.btn-sec { flex: 1; border: 1px solid var(--border); background: #fff; color: var(--text); font-weight: 550; font-size: 13px; padding: 9px; border-radius: 10px; cursor: pointer; transition: all 0.13s; }
.btn-sec:hover { border-color: var(--accent); color: var(--accent); }
.btn-sec.danger:hover { border-color: var(--danger); color: var(--danger); }
#reset { border: none; background: var(--accent); color: #fff; font-weight: 600; font-size: 13px; padding: 10px; border-radius: 10px; cursor: pointer; transition: filter 0.15s; }
#reset:hover { filter: brightness(1.08); }

#coord-readout { position: absolute; bottom: 46px; right: 14px; z-index: 1000; background: rgba(26, 31, 54, 0.82); color: #fff; backdrop-filter: blur(6px); font-size: 11.5px; font-variant-numeric: tabular-nums; padding: 6px 11px; border-radius: 9px; pointer-events: none; letter-spacing: 0.2px; }

#sim-disclaimer { position: absolute; bottom: 14px; right: 14px; z-index: 1000; background: rgba(26,31,54,0.72); color: #fff; backdrop-filter: blur(6px); font-size: 10.5px; font-weight: 500; line-height: 1.35; padding: 5px 10px; border-radius: 8px; max-width: 232px; text-align: right; pointer-events: none; }

#toast { position: absolute; bottom: 52px; left: 50%; transform: translateX(-50%) translateY(8px); z-index: 1100; background: rgba(26,31,54,0.95); color: #fff; font-size: 12.5px; font-weight: 500; padding: 9px 16px; border-radius: 999px; box-shadow: 0 6px 20px rgba(0,0,0,0.3); opacity: 0; pointer-events: none; transition: opacity 0.22s, transform 0.22s; }
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.center-pin { width: 18px; height: 18px; border-radius: 50%; background: var(--accent); border: 3px solid #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.4); }
.route-pin { width: 15px; height: 15px; border-radius: 50%; border: 3px solid #fff; box-shadow: 0 2px 7px rgba(0,0,0,0.4); }
.route-pin.start { background: var(--green); }
.route-pin.mid { background: var(--accent); }
.route-pin.last { background: var(--accent); box-shadow: 0 0 0 4px rgba(79,109,245,0.3), 0 2px 7px rgba(0,0,0,0.4); }
.leg-label { display: flex; align-items: center; justify-content: center; font: 700 10px/1 -apple-system, sans-serif; color: var(--text); background: rgba(255,255,255,0.9); border: 1px solid var(--border, rgba(0,0,0,0.15)); border-radius: 5px; padding: 1px 3px; white-space: nowrap; box-shadow: 0 1px 2px rgba(0,0,0,0.25); pointer-events: none; }

/* Navaid markers */
.navaid { display: flex; align-items: center; gap: 3px; white-space: nowrap; }
.nav-sym { width: 11px; height: 11px; flex: none; filter: drop-shadow(0 0 1px rgba(255,255,255,0.95)) drop-shadow(0 0 1px rgba(255,255,255,0.95)); }
.nav-vor .nav-sym { background: #2563eb; clip-path: polygon(25% 0,75% 0,100% 50%,75% 100%,25% 100%,0 50%); }
.nav-ndb .nav-sym { background: #db2777; border-radius: 50%; }
.nav-dme .nav-sym { background: #0d9488; border-radius: 2px; }
.nav-id { font: 700 10px/1 -apple-system, sans-serif; color: #16203c; text-shadow: 0 0 2px #fff, 0 0 2px #fff, 0 0 3px #fff; }
.nav-pop { font: 13px -apple-system, sans-serif; min-width: 150px; }
.nav-pop-id { font-weight: 700; font-size: 14px; color: var(--text); }
.nav-pop-id span { font-weight: 500; font-size: 10.5px; color: var(--muted); margin-left: 6px; text-transform: uppercase; letter-spacing: 0.4px; }
.nav-pop-name { color: var(--muted); margin: 2px 0 6px; }
.nav-pop-freq { font-weight: 700; font-variant-numeric: tabular-nums; color: var(--text); }
.nav-pop-btn { margin-top: 9px; width: 100%; border: none; background: var(--accent); color: #fff; border-radius: 8px; padding: 7px; font-size: 12px; font-weight: 600; cursor: pointer; }
.nav-pop-btn:hover { filter: brightness(1.08); }

/* Route waypoint delete popup */
.route-pop-wrap .leaflet-popup-content { margin: 0; }
.route-pop-wrap .leaflet-popup-content-wrapper { padding: 0; border-radius: 50%; background: transparent; box-shadow: none; }
.route-pop-wrap .leaflet-popup-tip { display: none; }
.route-pop { display: flex; }
.route-pop-del { display: flex; align-items: center; justify-content: center; width: 30px; height: 30px; padding: 0; border: 2px solid #fff; border-radius: 50%; background: var(--danger, #dc2626); color: #fff; cursor: pointer; box-shadow: 0 2px 8px rgba(0,0,0,0.4); }
.route-pop-del:hover { filter: brightness(1.1); }

/* Route points table */
.rp-empty { font-size: 12px; color: var(--muted); padding: 6px 2px; }
.rp-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.rp-table th { text-align: left; font-weight: 600; font-size: 10px; text-transform: uppercase; letter-spacing: 0.4px; color: var(--muted); padding: 4px 6px; border-bottom: 1px solid var(--border, rgba(0,0,0,0.12)); }
.rp-table td { padding: 5px 6px; border-bottom: 1px solid var(--border, rgba(0,0,0,0.08)); vertical-align: middle; }
.rp-table tbody tr:last-child td { border-bottom: none; }
.rp-n { color: var(--muted); white-space: nowrap; }
.rp-coord { font-variant-numeric: tabular-nums; white-space: nowrap; }
.rp-freq { font-variant-numeric: tabular-nums; white-space: nowrap; font-weight: 600; }
.rp-type { white-space: nowrap; }
.rp-tag { display: inline-block; font-size: 9.5px; font-weight: 700; letter-spacing: 0.3px; color: #fff; padding: 1px 5px; border-radius: 4px; vertical-align: middle; }
.rp-vor { background: #2563eb; }
.rp-ndb { background: #db2777; }
.rp-dme { background: #0d9488; }
.rp-wpt { background: var(--muted); }
.rp-act { text-align: right; width: 1%; }
.rp-del { border: none; background: transparent; color: var(--muted); cursor: pointer; font-size: 14px; line-height: 1; padding: 2px 4px; border-radius: 5px; }
.rp-del:hover { background: var(--danger, #dc2626); color: #fff; }
.rp-grip { cursor: grab; color: var(--muted); user-select: none; width: 1%; text-align: center; }
.rp-table tr[draggable] { cursor: default; }
.rp-dragging { opacity: 0.5; }
.rp-drop-before td { box-shadow: inset 0 2px 0 var(--accent); }
.rp-drop-after td { box-shadow: inset 0 -2px 0 var(--accent); }

/* Airport markers */
.airport { display: flex; align-items: center; gap: 3px; white-space: nowrap; }
.apt-sym { width: 10px; height: 10px; flex: none; background: #7c3aed; border: 1.5px solid #fff; border-radius: 50%; box-shadow: 0 0 1px rgba(0,0,0,0.6); }
.apt-md .apt-sym { width: 12px; height: 12px; }
.apt-lg .apt-sym { width: 14px; height: 14px; border-width: 2px; }
.apt-id { font: 700 10px/1 -apple-system, sans-serif; color: #2a1454; text-shadow: 0 0 2px #fff, 0 0 2px #fff, 0 0 3px #fff; }

/* Airport popup */
.apt-pop { font: 13px -apple-system, sans-serif; min-width: 190px; max-width: 240px; }
.apt-pop-id { font-weight: 700; font-size: 14px; color: var(--text); }
.apt-pop-id span { font-weight: 500; font-size: 10.5px; color: var(--muted); margin-left: 6px; text-transform: uppercase; letter-spacing: 0.4px; }
.apt-pop-name { color: var(--muted); font-size: 11.5px; margin: 1px 0; }
.apt-pop-sec { font-weight: 700; font-size: 10px; text-transform: uppercase; letter-spacing: 0.4px; color: var(--muted); margin: 9px 0 3px; border-bottom: 1px solid var(--border, rgba(0,0,0,0.12)); padding-bottom: 2px; }
.apt-pop-row { display: flex; justify-content: space-between; gap: 10px; font-size: 12px; padding: 1px 0; }
.apt-pop-k { color: var(--text); }
.apt-pop-v { color: var(--text); font-variant-numeric: tabular-nums; white-space: nowrap; }
.apt-pop-muted { color: var(--muted); }
.apt-pop-btn { margin-top: 10px; width: 100%; border: none; background: var(--accent); color: #fff; border-radius: 8px; padding: 7px; font-size: 12px; font-weight: 600; cursor: pointer; }
.apt-pop-btn:hover { filter: brightness(1.08); }

/* Waypoint (5-letter fix) markers */
.waypoint { display: flex; align-items: center; gap: 3px; white-space: nowrap; }
.wpt-sym { width: 0; height: 0; flex: none; border-left: 5px solid transparent; border-right: 5px solid transparent; border-bottom: 9px solid #7c3aed; filter: drop-shadow(0 0 1px rgba(255,255,255,0.95)) drop-shadow(0 0 1px rgba(255,255,255,0.95)); }
.wpt-id { font: 700 10px/1 -apple-system, sans-serif; color: #2a1454; text-shadow: 0 0 2px #fff, 0 0 2px #fff, 0 0 3px #fff; }

/* Waypoint popup */
.wpt-pop { font: 13px -apple-system, sans-serif; min-width: 150px; }
.wpt-pop-id { font-weight: 700; font-size: 14px; color: var(--text); letter-spacing: 0.5px; }
.wpt-pop-name { color: var(--muted); font-size: 11.5px; margin: 2px 0 0; font-variant-numeric: tabular-nums; }
.wpt-pop-btn { margin-top: 10px; width: 100%; border: none; background: var(--accent); color: #fff; border-radius: 8px; padding: 7px; font-size: 12px; font-weight: 600; cursor: pointer; }
.wpt-pop-btn:hover { filter: brightness(1.08); }

.leaflet-control-attribution { font-size: 10px; }

/* ---- Mobile / narrow viewport: fold panels into bottom-right FAB circles ---- */
@media (max-width: 640px) {
  /* Expanded panels become full-width top sheets. */
  #panel, #layers-panel {
    top: 12px; left: 12px; right: 12px; width: auto; max-width: none;
    max-height: calc(100vh - 24px);
  }

  /* Folded → circular button, stacked on the right edge, vertically centred. */
  #panel.collapsed, #layers-panel.collapsed {
    width: 56px; height: 56px; min-width: 0; left: auto; right: 16px; bottom: auto;
    border-radius: 50%;
  }
  #panel.collapsed { top: calc(50% - 62px); }      /* upper of the pair */
  #layers-panel.collapsed { top: calc(50% + 6px); } /* lower of the pair */

  /* The header is the round tappable button; only its pictogram shows. */
  #panel.collapsed #panel-header, #layers-panel.collapsed #layers-header {
    width: 56px; height: 56px; padding: 0; gap: 0; justify-content: center; cursor: pointer;
  }
  #panel.collapsed #panel-header h1, #layers-panel.collapsed .layers-title,
  #panel.collapsed #collapse-btn, #layers-panel.collapsed #layers-collapse-btn { display: none; }
  #panel.collapsed #panel-header svg, #layers-panel.collapsed #layers-header svg {
    width: 24px; height: 24px;
  }

  /* Bottom-right overlays would sit under the FABs. */
  #coord-readout { display: none; }
  #sim-disclaimer { left: 12px; right: auto; text-align: left; max-width: calc(100% - 90px); }
}