:root {
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --panel: #ffffff;
  --panel-soft: #f1f5f9;
  --text: #0f172a;
  --text-soft: #475569;
  --border: #e2e8f0;
  --accent: #0ea5e9;
  --topbar-h: 56px;
  --sidebar-w: 320px;
  --shadow: 0 4px 16px rgba(15, 23, 42, 0.12);
  --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
}

#app {
  display: grid;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar map";
  height: 100vh;
  height: 100dvh;
}

/* -------------------------------------------------------------- Topbar --- */
.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px;
  background: var(--bg);
  color: #fff;
  box-shadow: var(--shadow);
  z-index: 1200;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.brand-mark {
  font-size: 22px;
  line-height: 1;
}
.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.brand-text strong {
  font-size: 15px;
  white-space: nowrap;
}
.brand-text small {
  font-size: 11px;
  color: #94a3b8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lang-switch {
  margin-left: auto;
  display: inline-flex;
  background: var(--bg-soft);
  border-radius: 999px;
  padding: 3px;
}
.lang-btn {
  border: 0;
  background: transparent;
  color: #94a3b8;
  font-weight: 600;
  font-size: 12px;
  padding: 5px 11px;
  border-radius: 999px;
  cursor: pointer;
}
.lang-btn.is-active {
  background: var(--accent);
  color: #fff;
}

.icon-btn {
  display: none;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 6px;
}
.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  position: relative;
  transition: 0.2s;
}
.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
}
.hamburger::before {
  top: -7px;
}
.hamburger::after {
  top: 7px;
}

/* ------------------------------------------------------------- Sidebar --- */
.sidebar {
  grid-area: sidebar;
  background: var(--panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 16px 14px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  z-index: 1100;
}

.search {
  position: relative;
}
#search-input {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
}
#search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

.search-results {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  max-height: 300px;
  overflow-y: auto;
  position: absolute;
  left: 0;
  right: 0;
  z-index: 1300;
}
.search-results li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 13px;
  border-bottom: 1px solid var(--panel-soft);
}
.search-results li:last-child {
  border-bottom: 0;
}
.search-results li:hover,
.search-results li:focus {
  background: var(--panel-soft);
  outline: none;
}
.search-results .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.search-results .s-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.search-results .s-id {
  color: var(--text-soft);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
}
.search-empty {
  color: var(--text-soft);
  cursor: default !important;
}

.panel-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-soft);
  margin: 0 0 8px;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  user-select: none;
}
.toggle:hover {
  background: var(--panel-soft);
}
.toggle input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}
.swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex: 0 0 auto;
}

.panel--actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
.btn:hover {
  filter: brightness(1.05);
}
.btn--full {
  width: 100%;
}
.btn--ghost {
  background: transparent;
  color: var(--accent);
}
.counter {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--text-soft);
  text-align: center;
}

.sidebar-footer {
  margin-top: auto;
  font-size: 11px;
  color: var(--text-soft);
  line-height: 1.5;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.dataset-meta {
  margin: 8px 0 0;
  font-weight: 600;
  color: var(--text);
}

/* ---------------------------------------------------------------- Map ---- */
.map-wrap {
  grid-area: map;
  position: relative;
}
#map {
  position: absolute;
  inset: 0;
  background: #aadaff;
}

.loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(241, 245, 249, 0.85);
  color: var(--text-soft);
  font-size: 14px;
  z-index: 1000;
  transition: opacity 0.3s;
}
.loading.is-hidden {
  opacity: 0;
  pointer-events: none;
}
.spinner {
  width: 22px;
  height: 22px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  z-index: 1050;
}

/* --------------------------------------------------------------- Popup --- */
.leaflet-popup-content {
  margin: 0;
  width: 300px !important;
}
.leaflet-popup-content-wrapper {
  border-radius: 12px;
  padding: 0;
  overflow: hidden;
}
.popup {
  font-size: 13px;
  line-height: 1.5;
}
.popup-head {
  padding: 12px 14px 10px;
  border-top: 4px solid var(--c, #64748b);
  background: var(--panel-soft);
}
.popup-head h3 {
  margin: 6px 0 2px;
  font-size: 16px;
}
.popup-badge {
  display: inline-block;
  background: var(--c, #64748b);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.popup-id {
  font-size: 11px;
  color: var(--text-soft);
  font-variant-numeric: tabular-nums;
}
.popup-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
}
.popup-table th,
.popup-table td {
  text-align: left;
  vertical-align: top;
  padding: 6px 14px;
  border-bottom: 1px solid var(--panel-soft);
}
.popup-table th {
  color: var(--text-soft);
  font-weight: 600;
  white-space: nowrap;
  width: 38%;
}
.chip {
  display: inline-block;
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 11px;
  margin: 0 2px 2px 0;
}
.popup-msg {
  margin: 0;
  padding: 10px 14px;
  color: var(--text);
  background: #fff;
}
.popup-note {
  margin: 0;
  padding: 8px 14px 12px;
  color: var(--text-soft);
  font-size: 12px;
  white-space: pre-line;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* --------------------------------------------------------- Responsive --- */
@media (max-width: 768px) {
  #app {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "map";
  }
  .icon-btn {
    display: inline-flex;
  }
  .sidebar {
    position: fixed;
    top: var(--topbar-h);
    bottom: 0;
    left: 0;
    width: min(86vw, var(--sidebar-w));
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: var(--shadow);
  }
  .sidebar.is-open {
    transform: translateX(0);
  }
  .brand-text small {
    display: none;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --panel: #0b1220;
    --panel-soft: #131c2e;
    --text: #e2e8f0;
    --text-soft: #94a3b8;
    --border: #1e293b;
  }
  #search-input {
    background: var(--panel-soft);
    color: var(--text);
  }
  .leaflet-popup-content-wrapper,
  .popup-msg {
    background: var(--panel);
    color: var(--text);
  }
  .leaflet-popup-tip {
    background: var(--panel);
  }
  .popup-head {
    background: var(--panel-soft);
  }
}