:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1d242d;
  --border: #2a323c;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #2f81f7;
  --accent-2: #f7a32f;
  --good: #3fb950;
  --warn: #d29922;
  --bad: #f85149;
  --tx: #2f81f7;
  --a: #3fb950;
  --b: #f7a32f;
  --sidebar-w: 340px;
  --ctrl-h: 34px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

#app { position: relative; display: grid; grid-template-columns: var(--sidebar-w) 1fr; height: 100vh; overflow: hidden; transition: grid-template-columns .2s ease; }
#app.collapsed { grid-template-columns: 0 1fr; }
#app.collapsed #sidebar { transform: translateX(-100%); }

#sidebar {
  width: var(--sidebar-w);
  background: var(--panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .2s ease;
}

#brand {
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}
#brand h1 { margin: 0; font-size: 18px; letter-spacing: .2px; }
.tagline { margin: 3px 0 0; color: var(--muted); font-size: 12px; }

.icon-btn {
  width: 30px; height: 30px;
  flex: none;
  padding: 0;
  font-size: 18px;
  line-height: 1;
  color: var(--muted);
}
.icon-btn:hover { border-color: var(--accent); color: #fff; }
#btn-expand {
  position: absolute;
  top: 12px; left: 12px;
  z-index: 1000;
  width: 38px; height: 38px;
  font-size: 18px;
  background: var(--panel);
  box-shadow: 0 2px 8px rgba(0,0,0,.5);
}
#btn-expand[hidden] { display: none; }

.panel { padding: 14px 16px; border-bottom: 1px solid var(--border); }
.panel h2 {
  margin: 0 0 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--muted);
}

/* Collapsible panel sections */
.panel .panel-head {
  margin: 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.panel .panel-head:hover { color: var(--text); }
.panel-head .chev { font-size: 9px; color: var(--muted); transition: transform .15s ease; }
.panel.collapsed .panel-head .chev { transform: rotate(-90deg); }
.panel-body { margin-top: 10px; }
.panel.collapsed .panel-body { display: none; }

/* Grid layouts keep inputs in tidy aligned columns. */
.grid2, .grid3 { display: grid; gap: 8px 10px; }
.grid2 { grid-template-columns: 1fr 1fr; }
.grid3 { grid-template-columns: 1fr 1fr 1fr; }

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11px;
  color: var(--muted);
  min-width: 0;
}

/* Layer toggles as compact buttons on one line that highlight when enabled */
.layer-btns { display: flex; flex-direction: row; gap: 6px; }
.layer-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 4px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  user-select: none;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.layer-btn span { white-space: nowrap; }
.layer-btn input { position: absolute; opacity: 0; width: 0; height: 0; }
.layer-btn::before {
  content: '';
  flex: none;
  width: 13px; height: 13px;
  border-radius: 4px;
  border: 1.5px solid var(--muted);
  background: transparent;
  transition: background .15s ease, border-color .15s ease;
}
.layer-btn:hover { border-color: var(--c); }
/* Per-layer accent colour, applied when enabled. */
.lyr-day { --c: var(--accent-2); }
.lyr-muf { --c: #a78bfa; }
.lyr-clut { --c: var(--good); }
.layer-btn:has(input:checked) {
  border-color: var(--c);
  color: #fff;
  background: color-mix(in srgb, var(--c) 18%, var(--panel-2));
}
.layer-btn:has(input:checked)::before {
  background: var(--c);
  border-color: var(--c);
  box-shadow: inset 0 0 0 2px var(--panel-2);
}
.layer-btn:has(input:focus-visible) { outline: 2px solid var(--c); outline-offset: 2px; }

input, select {
  height: var(--ctrl-h);
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 7px;
  padding: 0 9px;
  font-size: 13px;
  width: 100%;
}
input:focus, select:focus { outline: 1px solid var(--accent); border-color: var(--accent); }

button {
  height: var(--ctrl-h);
  cursor: pointer;
  border-radius: 7px;
  border: 1px solid var(--border);
  padding: 0 12px;
  font-size: 13px;
  background: var(--panel-2);
  color: var(--text);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
button.ghost:hover { border-color: var(--accent); color: #fff; }
button.primary {
  width: 100%;
  height: 38px;
  margin-top: 12px;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
button.primary:hover { filter: brightness(1.08); }
button.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* Time bar along the bottom of the map. */
:root { --timebar-h: 64px; }
.timebar {
  position: absolute; left: 12px; right: 12px; bottom: 12px; z-index: 1000;
  max-width: 820px; margin: 0 auto;
  background: rgba(22, 27, 34, .94); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .45);
  padding: 8px 10px 6px;
}
.tb-row { display: flex; align-items: center; gap: 8px; }
.tb-row .step { width: 28px; height: 28px; flex: none; padding: 0; font-size: 10px; color: var(--muted); }
.tb-row .step:hover { border-color: var(--accent); color: #fff; }
#time-slider { flex: 1; accent-color: var(--accent); min-width: 80px; height: 28px; padding: 0; background: none; border: 0; }
.slider-label { font-size: 11px; color: var(--muted); min-width: 40px; text-align: right; font-variant-numeric: tabular-nums; }
.tb-row input[type="datetime-local"] { width: auto; flex: none; height: 30px; font-size: 12px; }
.tb-row button.ghost { height: 30px; padding: 0 10px; font-size: 12px; }
.tb-sub { display: flex; gap: 12px; justify-content: space-between; margin-top: 3px; min-height: 15px; }
.forecast-note { font-size: 11px; color: var(--accent-2); }
/* Lift Leaflet's bottom controls (legend, attribution) clear of the time bar. */
#map .leaflet-bottom { bottom: calc(var(--timebar-h) + 14px); }

/* Path 24-hour band-opening chart */
.bandchart { margin-top: 10px; font-size: 10px; }
.bandchart table { border-collapse: collapse; width: 100%; }
.bandchart td, .bandchart th { padding: 0; }
.bandchart .blabel { font-size: 10px; color: var(--muted); padding-right: 6px; white-space: nowrap; text-align: right; width: 1%; }
.bandchart .cell { width: 4.1%; height: 11px; border: 0.5px solid var(--bg); }
.bandchart .cell.open { background: var(--good); }
.bandchart .cell.marginal { background: var(--warn); }
.bandchart .cell.closed { background: var(--panel-2); }
.bandchart .hr { color: var(--muted); font-size: 9px; text-align: left; }
.bandchart .now { outline: 1px solid #fff; outline-offset: -1px; }

.status-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--muted);
  margin-top: 10px;
}
.status-line button { height: 26px; font-size: 11px; padding: 0 8px; }

/* Primary mode panel: the tab bar sticks to the top as you scroll the sidebar. */
.panel-mode {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--panel);
  padding-top: 12px;
}

/* Tabs — the primary "what am I doing" switch. */
.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 14px;
  padding: 4px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 9px;
}
.tab {
  height: auto;
  flex-direction: column;
  gap: 2px;
  padding: 8px 6px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  text-align: center;
}
.tab .tab-title { font-size: 13px; font-weight: 600; color: var(--text); }
.tab .tab-sub { font-size: 10px; color: var(--muted); white-space: nowrap; }
.tab:hover:not(.active) { border-color: var(--border); }
.tab.active {
  background: var(--accent);
  border-color: var(--accent);
}
.tab.active .tab-title,
.tab.active .tab-sub { color: #fff; }

.mode-body.hidden { display: none; }
.hint { color: var(--muted); font-size: 12px; margin: 0 0 12px; }

/* Site picker: badge + coords + action buttons, all aligned. */
.site {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 8px;
  margin-bottom: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.site .coords { font-variant-numeric: tabular-nums; font-size: 12px; color: var(--text); }
.site-actions { display: flex; gap: 6px; }
.site-actions button { height: 28px; padding: 0 10px; font-size: 12px; }
.coords { color: var(--muted); }

/* Pin badges — shared by sidebar tags and Leaflet map markers. */
.pin {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.5);
}
.site-tag { width: 28px; height: 28px; }
.pin-tx { background: var(--tx); }
.pin-a { background: var(--a); }
.pin-b { background: var(--b); }
.pin-wrap { background: none; border: none; }

/* Results */
.results { margin-top: 12px; font-size: 13px; }
.results table { width: 100%; border-collapse: collapse; margin-bottom: 8px; }
.results th, .results td { text-align: left; padding: 4px 4px; border-bottom: 1px solid var(--border); }
.results td:first-child { color: var(--muted); }
.results .big { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.pill { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.pill.open { background: rgba(63,185,80,.18); color: var(--good); }
.pill.marginal { background: rgba(210,153,34,.2); color: var(--warn); }
.pill.closed { background: rgba(248,81,73,.18); color: var(--bad); }
.row-best { background: rgba(47,129,247,.14); }
tr.band-row { cursor: pointer; }
tr.band-row:hover { background: rgba(255,255,255,.06); }
tr.band-row.selected { outline: 1px solid var(--accent); background: rgba(47,129,247,.18); }
.legend { display: flex; gap: 14px; align-items: center; font-size: 11px; color: var(--muted); margin-top: 6px; }
.legend .dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 5px; vertical-align: middle; }
.dot-a { background: var(--a); }
.dot-b { background: var(--b); }

/* Site card "set" state — makes it obvious whether A/B/TX are placed. */
.site .coords { color: var(--text); }
.site:not(.is-set) .coords { color: var(--warn); font-style: italic; }
.site.is-set { border-color: var(--good); }

/* Band toggle chips (coverage mode) */
.band-toggles { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.band-chip {
  height: 28px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--muted);
}
.band-chip .chip-sw { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.band-chip:hover { color: #fff; }
.band-chip.on { color: #fff; font-weight: 600; background: var(--panel); }

/* Legend dots in coverage results (colour set from JS) */
.bdot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 7px; vertical-align: middle; }


#map-wrap { position: relative; min-width: 0; min-height: 0; }
#map { height: 100%; width: 100%; background: #0a0d11; }

.leaflet-popup-content-wrapper, .leaflet-popup-tip { background: var(--panel-2); color: var(--text); }
.leaflet-container { background: #0a0d11; }
.leaflet-tooltip { background: var(--panel-2); border-color: var(--border); color: var(--text); }

@media (max-width: 720px) {
  #app { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  #sidebar { width: 100%; max-height: 50vh; }
  .timebar { left: 6px; right: 6px; bottom: 6px; padding: 6px 8px 4px; }
  .tb-row { flex-wrap: wrap; row-gap: 6px; }
  #time-slider { flex-basis: 40%; }
  .tb-row input[type="datetime-local"] { flex: 1; }
  :root { --timebar-h: 92px; }
  /* Collapse vertically (slide the panel up) on narrow screens. */
  #app.collapsed { grid-template-columns: 1fr; grid-template-rows: 0 1fr; }
  #app.collapsed #sidebar { transform: translateY(-100%); }
}

/* Live space-weather / ionosonde readout under the solar panel. */
.wx-list { list-style: none; margin: 6px 0 0; padding: 0; font-size: 11px; color: var(--muted); display: grid; gap: 2px; }
.wx-list b { color: var(--text, #c9d1d9); font-weight: 600; }
.wx-list .warn { color: var(--warn); }
.lyr-iono { --c: #79c0ff; }
.snr { color: var(--muted); font-size: 11px; }
.loss-table td:last-child { text-align: right; font-variant-numeric: tabular-nums; }

/* Header actions (share + collapse). */
.brand-actions { display: flex; gap: 6px; }

/* Locator / coordinate entry under each site. */
.site .loc-input {
  grid-column: 2 / 4;
  height: 28px; font-size: 12px; padding: 0 8px;
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
}
.site .loc-input:focus { outline: none; border-color: var(--accent); }
.site .loc-input.bad { border-color: var(--bad); }

/* Coverage view switch (segmented control). */
.view-switch { display: flex; margin: 0 0 10px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.view-switch .seg {
  flex: 1; height: 30px; border: 0; border-radius: 0; font-size: 12px;
  background: var(--panel-2); color: var(--muted); cursor: pointer;
}
.view-switch .seg + .seg { border-left: 1px solid var(--border); }
.view-switch .seg.active { background: var(--accent); color: #fff; }
.band-toggles.disabled { opacity: .45; pointer-events: none; }

/* UTC readout under the time field. */
.utc-line { font-size: 11px; color: var(--muted); font-variant-numeric: tabular-nums; }

/* One-line summary in a collapsed panel header. */
.panel-summary {
  flex: 1; margin: 0 8px; text-align: right; font-size: 11px; font-weight: 400;
  text-transform: none; letter-spacing: 0; color: var(--muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.panel:not(.collapsed) .panel-summary { visibility: hidden; }

/* "Why closed" tag in the path table. */
.why { display: inline-block; margin-left: 4px; font-size: 10px; color: var(--muted); white-space: nowrap; }

/* Map legend (Leaflet control). */
.map-legend {
  background: rgba(14, 17, 22, .88); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 10px; font-size: 11px; line-height: 1.5; max-width: 240px;
}
.map-legend .ramp { display: flex; height: 8px; border-radius: 4px; overflow: hidden; margin: 4px 0 2px; }
.map-legend .ramp span { flex: 1; }
.map-legend .ticks { display: flex; justify-content: space-between; color: var(--muted); }
.map-legend .sw { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin: 0 4px 0 0; vertical-align: -1px; }
.map-legend .bands { display: grid; grid-template-columns: repeat(3, auto); gap: 0 10px; margin-top: 4px; }

/* Map-click inspection popup. */
.inspect table { border-collapse: collapse; font-size: 12px; }
.inspect td { padding: 1px 6px 1px 0; }
.inspect .open { color: var(--good); }
.inspect .marginal { color: var(--warn); }
.inspect .closed { color: var(--muted); }
.inspect button { margin-top: 6px; width: 100%; }
.inspect h4 { margin: 0 0 4px; font-size: 12px; }

/* Busy indicator and toast over the map. */
.busy, .toast {
  position: fixed; left: 50%; transform: translateX(-50%); z-index: 1000;
  background: rgba(14, 17, 22, .92); color: var(--text);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 6px 14px; font-size: 12px; pointer-events: none;
}
.busy { top: 12px; }
.toast { bottom: 24px; }
.busy[hidden], .toast[hidden] { display: none; }

/* Map layer toggles as a Leaflet control (top-right, under zoom). */
.leaflet-control.layer-btns {
  display: flex; flex-direction: column; gap: 4px;
  background: rgba(22, 27, 34, .94); padding: 6px; border-radius: 9px;
  border: 1px solid var(--border); box-shadow: 0 2px 8px rgba(0, 0, 0, .4);
}
.leaflet-control.layer-btns .layer-btn { flex: none; flex-direction: row; justify-content: flex-start; padding: 5px 9px; font-size: 11px; }
.layer-btns[hidden] { display: none; }

/* Small heading inside a panel body. */
.sub-head { margin: 12px 0 6px; font-size: 11px; color: var(--muted); }

/* "Advanced" disclosure in the station panel. */
.advanced { margin-top: 10px; }
.advanced summary {
  cursor: pointer; font-size: 11px; color: var(--muted); user-select: none;
  list-style: none; display: inline-flex; align-items: center; gap: 6px;
}
.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before { content: '▸'; font-size: 9px; transition: transform .15s ease; }
.advanced[open] summary::before { transform: rotate(90deg); }
.advanced summary:hover { color: var(--text); }
.advanced .grid2 { margin-top: 8px; }

/* Conditions summary turns amber when there's a disturbance. */
.panel-summary.warn { color: var(--warn); }

/* About dialog. */
.about {
  max-width: 520px; width: calc(100% - 32px);
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px;
  font-size: 13px; line-height: 1.55;
}
.about::backdrop { background: rgba(0, 0, 0, .55); }
.about h2 { margin: 0 0 10px; font-size: 16px; }
.about h3 { margin: 14px 0 6px; font-size: 12px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); }
.about ul { margin: 0; padding-left: 18px; }
.about a { color: var(--accent-2); }
.about-actions { margin-top: 12px; }

/* Phones: keep map overlays small so the map itself stays visible. */
@media (max-width: 720px) {
  .leaflet-control.layer-btns { padding: 4px; gap: 3px; }
  .leaflet-control.layer-btns .layer-btn { padding: 3px 7px; font-size: 10px; gap: 5px; }
  .leaflet-control.layer-btns .layer-btn::before { width: 10px; height: 10px; }
  .map-legend { padding: 5px 7px; font-size: 10px; max-width: 170px; }
}