: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 row: input grows, Now button aligns to its bottom. */
.time-row { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: end; margin-top: 10px; }

.slider-row { display: flex; align-items: center; gap: 8px; margin-top: 10px; }
.slider-row .step { width: 26px; height: 26px; flex: none; padding: 0; font-size: 10px; color: var(--muted); }
.slider-row .step:hover { border-color: var(--accent); color: #fff; }
#time-slider { flex: 1; accent-color: var(--accent); min-width: 0; }
.slider-label { font-size: 11px; color: var(--muted); min-width: 54px; text-align: right; font-variant-numeric: tabular-nums; }
.forecast-note { margin: 6px 0 0; font-size: 11px; color: var(--accent-2); min-height: 0; }

/* 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; }

/* Tabs */
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 12px; }

.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; }

#caveat { margin-top: auto; padding: 12px 16px; color: var(--muted); font-size: 11px; }

#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: 55vh; }
  /* 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%); }
}