:root {
  --bg: #0b1220;
  --panel: rgba(18, 26, 40, 0.92);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: #eef3fb;
  --muted: #9aa8bc;
  --accent: #3b82f6;
  --accent-2: #2563eb;
  --danger: #ef4444;
  --cover: rgba(220, 38, 38, 0.42);
  --cover-stroke: rgba(185, 28, 28, 0.85);
  --banner: #93c5fd;
  --banner-text: #0f172a;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  height: 100%;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
}

.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 48px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  background: linear-gradient(180deg, #111827 0%, #0f172a 100%);
  border-bottom: 1px solid var(--panel-border);
}
.topbar h1 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.banner {
  position: fixed;
  top: 48px; left: 0; right: 0;
  z-index: 1000;
  padding: 8px 14px;
  background: var(--banner);
  color: var(--banner-text);
  font-size: 0.86rem;
  font-weight: 600;
}

.setup-alert {
  position: fixed;
  top: 88px; left: 12px; right: 12px;
  z-index: 1100;
  background: #7f1d1d;
  border: 1px solid #fecaca;
  color: #fff;
  padding: 12px 14px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  font-size: 0.9rem;
}
.setup-detail {
  margin-top: 6px;
  opacity: 0.85;
  font-size: 0.8rem;
  word-break: break-word;
}

#map {
  position: absolute;
  inset: 0;
  top: 0;
  z-index: 1;
}

.layers-panel {
  position: fixed;
  top: 96px;
  left: 12px;
  right: 12px;
  max-width: 380px;
  z-index: 1000;
  background: var(--panel);
  backdrop-filter: blur(10px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.layers-head {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 6px;
  align-items: center;
  padding: 10px 10px 8px;
  border-bottom: 1px solid var(--panel-border);
}
.layers-head strong { font-size: 0.95rem; }
.icon-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
}
.icon-btn:hover { background: rgba(255,255,255,0.06); color: var(--text); }

.layers-list {
  list-style: none;
  margin: 0;
  padding: 6px 0;
  max-height: 42vh;
  overflow: auto;
}
.layers-list li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
}
.layers-list li:hover { background: rgba(255,255,255,0.04); }
.layer-meta { min-width: 0; }
.layer-meta .name { font-weight: 650; }
.layer-meta .coords {
  color: var(--muted);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.layer-meta .area {
  color: #fca5a5;
  font-size: 0.75rem;
  margin-top: 2px;
}

.fab-stack {
  position: fixed;
  right: 14px;
  bottom: 18px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.fab {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 0;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(160deg, #1e3a8a, #1d4ed8);
  box-shadow: var(--shadow);
  display: grid;
  place-items: center;
}
.fab:hover { filter: brightness(1.08); }
.fab.active { outline: 2px solid #93c5fd; }

.status-toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 1200;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  box-shadow: var(--shadow);
  max-width: min(90vw, 420px);
  text-align: center;
}

.sheet {
  border: 0;
  padding: 0;
  background: transparent;
  max-width: 420px;
  width: calc(100% - 24px);
}
.sheet::backdrop { background: rgba(2, 6, 23, 0.55); }
.sheet-inner {
  background: #111827;
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 18px;
  box-shadow: var(--shadow);
}
.sheet-inner h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
}
.sheet-inner label {
  display: block;
  margin: 0 0 12px;
  font-size: 0.86rem;
  color: var(--muted);
}
.sheet-inner label.check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}
.sheet-inner input[type="number"],
.sheet-inner select {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: #0b1220;
  color: var(--text);
  font: inherit;
}
.sheet-sep {
  border: 0;
  border-top: 1px solid var(--panel-border);
  margin: 8px 0 16px;
}
.swatch-field {
  border: 0;
  margin: 0 0 14px;
  padding: 0;
}
.swatch-field legend {
  font-size: 0.86rem;
  color: var(--muted);
  margin-bottom: 8px;
  padding: 0;
}
.swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.swatch {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 2px solid transparent;
  background: var(--sw);
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.25);
  padding: 0;
}
.swatch[aria-checked="true"],
.swatch.active {
  outline: 2px solid #93c5fd;
  outline-offset: 2px;
  border-color: #fff;
}
.hint {
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.4;
  margin: 0 0 14px;
}
.coords {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  margin-bottom: 12px;
}
.sheet-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 8px;
}
.btn {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.ghost { background: rgba(255,255,255,0.06); color: var(--text); }
.btn.danger { background: rgba(239,68,68,0.15); color: #fecaca; margin-right: auto; }

.opt-progress { margin: 8px 0 12px; }
.opt-bar {
  height: 8px;
  background: rgba(255,255,255,0.08);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 6px;
}
.opt-bar span {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #2563eb, #60a5fa);
  transition: width 0.25s ease;
}
#optStatus { font-size: 0.8rem; color: var(--muted); }

.leaflet-container { background: #0b1220; font: inherit; }

.antenna-marker {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #2563eb;
  border: 2px solid #fff;
  color: #fff;
  font-weight: 800;
  font-size: 13px;
  display: grid;
  place-items: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.35);
}
.antenna-marker.target {
  background: #b45309;
}
.antenna-marker.optimal {
  background: #059669;
  width: 34px;
  height: 34px;
}
.antenna-marker.priority {
  background: #d97706;
  width: 32px;
  height: 32px;
  font-size: 12px;
  border-color: #fef3c7;
}

.results-panel {
  position: fixed;
  top: 96px;
  left: 12px;
  right: 12px;
  max-width: 380px;
  z-index: 1000;
  background: var(--panel);
  backdrop-filter: blur(10px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.results-body {
  padding: 8px 12px 12px;
  max-height: 36vh;
  overflow: auto;
}
.result-row {
  padding: 8px 0;
  border-bottom: 1px solid var(--panel-border);
}
.result-row:last-child { border-bottom: 0; }
.result-row .name { font-weight: 650; }
.result-row .coords {
  color: var(--muted);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}
.result-row .area {
  color: #6ee7b7;
  font-size: 0.75rem;
  margin-top: 2px;
}

.fab.active { outline: 2px solid #93c5fd; }

.leaflet-control-layers {
  border: 0 !important;
  border-radius: 12px !important;
  box-shadow: var(--shadow) !important;
}
.leaflet-control-layers-expanded {
  padding: 10px 12px !important;
  background: #111827 !important;
  color: #eef3fb !important;
}
.leaflet-control-layers label {
  color: #eef3fb !important;
}

@media (min-width: 720px) {
  .results-panel { right: auto; }
}