.app-shell {
  display: grid;
  grid-template-rows: 56px 1fr;
  grid-template-columns: 320px 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar map";
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 20;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}
.topbar-brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--success));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #04121f;
  font-size: 13px;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-dim);
}

.sidebar {
  grid-area: sidebar;
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.panel-block {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.panel-block h3 {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.layer-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  padding: 6px 0;
}
.layer-toggle input { accent-color: var(--accent); width: 16px; height: 16px; }

.coord-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.map-area {
  grid-area: map;
  position: relative;
}
#map { width: 100%; height: 100%; background: #dde3ea; }
:root[data-theme="dark"] #map { background: #0b1119; }
:root[data-theme="dark"] .leaflet-control-layers-toggle { filter: invert(1) hue-rotate(180deg); }

.map-status {
  position: absolute;
  bottom: 12px;
  left: 12px;
  z-index: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--text-dim);
  pointer-events: none;
  box-shadow: var(--shadow);
}

.hint {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
  margin: 0;
}

/* Leaflet base-layer switcher restyle for a "pro" look */
.leaflet-control-layers {
  background: var(--surface) !important;
  color: var(--text);
  border: 1px solid var(--border) !important;
  border-radius: 10px !important;
  box-shadow: var(--shadow) !important;
}
.leaflet-control-layers-expanded {
  padding: 10px 14px !important;
  font-size: 13px;
}
.leaflet-control-layers-base label {
  margin: 4px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.leaflet-control-layers-separator { border-top: 1px solid var(--border) !important; }

/* Leaflet popup restyle for a "pro" look */
.leaflet-popup-content-wrapper {
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.leaflet-popup-tip { background: var(--surface); }
.leaflet-popup-content { margin: 14px 16px; min-width: 260px; }
.leaflet-container a.leaflet-popup-close-button { color: var(--text-dim); }

.feature-card { border-bottom: 1px solid var(--border); padding-bottom: 10px; margin-bottom: 10px; }
.feature-card:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.feature-card .fc-index { font-weight: 700; color: var(--accent); font-size: 13px; }
.feature-card .fc-name { font-size: 13px; margin: 4px 0 6px; }
.feature-card .fc-info-label { font-size: 11px; text-transform: uppercase; color: var(--text-dim); margin: 6px 0 2px; }
.feature-card .fc-info-list { font-size: 12px; margin: 0; padding-left: 16px; }
.feature-card .fc-empty { font-size: 12px; color: var(--text-dim); font-style: italic; }