/* ============================================================
   Subsidence Sentinel — Coastal Cities Sinking
   Houston-Galveston Region
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-dark:       #0d1117;
  --bg-panel:      #161b22;
  --bg-card:       #21262d;
  --bg-card-hover: #292e36;
  --border:        #30363d;
  --text-primary:  #e6edf3;
  --text-muted:    #8b949e;
  --text-accent:   #58a6ff;
  --critical:      #f85149;
  --high:          #ff7b72;
  --moderate:      #ffa657;
  --low:           #ffd700;
  --stable:        #3fb950;
  --stabilized:    #79c0ff;
  --water:         #1f6feb;
  --header-h:      56px;
  --sidebar-w:     340px;
  --chart-h:       220px;
}

html, body {
  height: 100%;
  width: 100%;
  overflow: hidden;
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 13px;
}

/* ── Header ──────────────────────────────────────────────── */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  z-index: 1000;
  gap: 16px;
}

#header h1 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

#header h1 span.icon {
  font-size: 20px;
}

#header .subtitle {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

#header .divider {
  width: 1px;
  height: 24px;
  background: var(--border);
}

#header .stat-chip {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

#header .stat-chip .val {
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  color: var(--critical);
}

#header .stat-chip .lbl {
  font-size: 10px;
  color: var(--text-muted);
  white-space: nowrap;
}

#header .stat-chip.blue .val  { color: var(--text-accent); }
#header .stat-chip.amber .val { color: var(--moderate); }
#header .stat-chip.green .val { color: var(--stable); }

.header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-right a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 12px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: all .15s;
}
.header-right a:hover {
  color: var(--text-primary);
  border-color: var(--text-accent);
}

/* ── Layout ──────────────────────────────────────────────── */
#app {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0; bottom: 0;
  display: flex;
}

/* ── Sidebar ─────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.sidebar-section {
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--border);
}

.sidebar-section h2 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

/* Scenario selector */
.scenario-tabs {
  display: flex;
  gap: 4px;
}

.scenario-tab {
  flex: 1;
  padding: 7px 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all .15s;
}

.scenario-tab:hover { border-color: var(--text-accent); color: var(--text-primary); }
.scenario-tab.active { background: var(--text-accent); border-color: var(--text-accent); color: #fff; }
.scenario-tab.active.high { background: var(--critical); border-color: var(--critical); }
.scenario-tab.active.intermediate { background: var(--moderate); border-color: var(--moderate); color: #000; }
.scenario-tab.active.low { background: var(--stable); border-color: var(--stable); color: #000; }

/* Year slider */
.slider-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.slider-year {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.slider-label { font-size: 11px; color: var(--text-muted); }

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-accent);
  border: 2px solid var(--bg-panel);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--text-accent);
  border: 2px solid var(--bg-panel);
  cursor: pointer;
}

.slider-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-muted);
}

/* Projection cards */
.proj-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.proj-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
}

.proj-card .proj-val {
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
}

.proj-card .proj-lbl {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 2px;
}

.proj-card.slr .proj-val  { color: var(--text-accent); }
.proj-card.sub .proj-val  { color: var(--critical); }
.proj-card.tot .proj-val  { color: var(--moderate); }
.proj-card.acc .proj-val  { color: #d2a8ff; }

.proj-card.full-width { grid-column: 1 / -1; }

/* Layer toggles */
.layer-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
}
.layer-toggle:last-child { border-bottom: none; }

.layer-toggle label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  font-size: 12px;
  color: var(--text-primary);
}

.layer-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Toggle switch */
.toggle-switch {
  position: relative;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0; height: 0;
}

.toggle-switch .slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 20px;
  cursor: pointer;
  transition: .2s;
}

.toggle-switch .slider::before {
  content: "";
  position: absolute;
  height: 14px; width: 14px;
  left: 3px; bottom: 3px;
  background: #fff;
  border-radius: 50%;
  transition: .2s;
}

.toggle-switch input:checked + .slider { background: var(--text-accent); }
.toggle-switch input:checked + .slider::before { transform: translateX(16px); }

/* Info panel */
#info-panel {
  margin: 10px;
  padding: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 100px;
}

#info-panel .info-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

#info-panel .info-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
}

#info-panel .info-row:last-child { border-bottom: none; }
#info-panel .info-key { color: var(--text-muted); }
#info-panel .info-val { color: var(--text-primary); font-weight: 600; text-align: right; max-width: 180px; }

#info-panel .placeholder {
  color: var(--text-muted);
  font-size: 12px;
  font-style: italic;
  text-align: center;
  padding: 16px 0;
}

/* Legend */
.legend-items {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
}

.legend-swatch {
  width: 28px;
  height: 10px;
  border-radius: 3px;
  flex-shrink: 0;
}

/* Data sources */
.sources-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sources-list li {
  font-size: 10px;
  color: var(--text-muted);
  padding-left: 8px;
  border-left: 2px solid var(--border);
}

.sources-list a {
  color: var(--text-accent);
  text-decoration: none;
}
.sources-list a:hover { text-decoration: underline; }

/* ── Map area ─────────────────────────────────────────────── */
#map-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#map {
  flex: 1;
  background: #0a1628;
}

/* Chart panel */
#chart-panel {
  height: var(--chart-h);
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 10px 14px 8px;
  gap: 6px;
}

#chart-panel .chart-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

#chart-panel .chart-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-primary);
}

#chart-panel .chart-sub {
  font-size: 10px;
  color: var(--text-muted);
}

#chart-panel .chart-tabs {
  margin-left: auto;
  display: flex;
  gap: 4px;
}

.chart-tab {
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--text-muted);
  font-size: 10px;
  cursor: pointer;
  transition: all .15s;
}
.chart-tab:hover { border-color: var(--text-accent); color: var(--text-primary); }
.chart-tab.active { background: var(--bg-card); border-color: var(--text-accent); color: var(--text-primary); }

#chart-canvas-wrap {
  flex: 1;
  position: relative;
  min-height: 0;
}

/* Leaflet overrides */
.leaflet-control-attribution {
  background: rgba(13,17,23,.8) !important;
  color: var(--text-muted) !important;
  font-size: 9px !important;
}

.leaflet-control-attribution a { color: var(--text-accent) !important; }

.leaflet-popup-content-wrapper {
  background: var(--bg-card) !important;
  border: 1px solid var(--border) !important;
  border-radius: 8px !important;
  color: var(--text-primary) !important;
  box-shadow: 0 8px 24px rgba(0,0,0,.6) !important;
}

.leaflet-popup-tip { background: var(--bg-card) !important; }

.leaflet-popup-content {
  margin: 12px 14px !important;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
  font-size: 12px !important;
  line-height: 1.5 !important;
}

.popup-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.popup-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 3px 0;
  border-bottom: 1px solid rgba(48,54,61,.5);
}
.popup-row:last-child { border-bottom: none; }
.popup-key { color: var(--text-muted); }
.popup-val { font-weight: 600; }

/* Rate badge colors */
.rate-critical { color: var(--critical); }
.rate-high     { color: var(--high); }
.rate-moderate { color: var(--moderate); }
.rate-low      { color: var(--low); }
.rate-stable   { color: var(--stable); }
.rate-stabilized { color: var(--stabilized); }

/* Play button */
#play-btn {
  padding: 5px 12px;
  background: var(--text-accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s;
}
#play-btn:hover { opacity: .85; }
#play-btn.playing { background: var(--critical); }

/* Inundation legend */
.inundation-legend {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.inundation-legend .il-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: var(--text-muted);
}

.inundation-legend .il-swatch {
  width: 12px; height: 12px;
  border-radius: 2px;
}

/* Responsive — collapse chart on small screens */
@media (max-height: 640px) {
  #chart-panel { display: none; }
}

@media (max-width: 768px) {
  :root { --sidebar-w: 280px; }
}

/* Animate inundation */
@keyframes flood-pulse {
  0%   { opacity: .45; }
  50%  { opacity: .70; }
  100% { opacity: .45; }
}

.flood-animated { animation: flood-pulse 3s ease-in-out infinite; }