/* --- 1. CSS Variables (Design System) --- */
:root {
  --primary: #2563eb;        /* Modern Blue */
  --primary-hover: #1d4ed8;
  --danger: #ef4444;         /* Red for Delete */
  --danger-hover: #dc2626;
  --success: #10b981;        /* Green for Add/Merge */
  --success-hover: #059669;
  
  --bg-main: #f8fafc;
  --bg-panel: #ffffff;
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-panel: 4px 0 15px -3px rgb(0 0 0 / 0.1);
  
  --radius: 8px;
}

/* --- 2. Base Reset & Layout --- */
* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0; height: 100%;
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
}

.row {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* --- 3. Sidebar (Left Column) --- */
.column_left {
  width: 420px;
  min-width: 420px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  box-shadow: var(--shadow-panel);
  display: flex;
  flex-direction: column;
  z-index: 1000; /* Keeps shadow over the map */
}

#ui-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.tabcontent {
  padding: 12px 20px;
  overflow-y: auto;
  flex-grow: 1;
  display: none;
}

/* Custom Scrollbar for Sidebar */
.tabcontent::-webkit-scrollbar { width: 8px; }
.tabcontent::-webkit-scrollbar-track { background: transparent; }
.tabcontent::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 10px; }
.tabcontent::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* --- 4. The Map (Right Column) --- */
.column_right {
  flex-grow: 1;
  position: relative;
}
#map {
  height: 100%;
  width: 100%;
}

/* --- 5. Navigation Tabs --- */
.tab {
  display: flex;
  background: var(--bg-main);
  border-bottom: 1px solid var(--border);
}

.tablinks {
  flex: 1;
  padding: 16px 12px;
  border: none;
  background: transparent;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  border-bottom: 3px solid transparent;
}

.tablinks:hover {
  background: #f1f5f9;
  color: var(--primary);
}

.tablinks.active {
  background: var(--bg-panel);
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* --- 6. Typography & Forms --- */
h1 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--text-main);
  border-bottom: 2px solid var(--bg-main);
  padding-bottom: 8px;
}

p, label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-top: 0;
  margin-bottom: 0.4rem;
  color: #334155;
}

/* Inputs, Selects, and Number boxes */
input[type="number"], 
select.selector, 
input[type="file"] {
  padding: 4px 10px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text-main);
  background-color: var(--bg-panel);
  transition: all 0.2s ease;
  width: 180px; /* Aligns all inputs on the right */
}

/* Specific styling for color pickers */
input[type="color"] {
  -webkit-appearance: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 180px;
  height: 38px;
  padding: 2px;
  background-color: var(--bg-panel);
  cursor: pointer;
}

/* Fix for Chrome/Edge/Safari inner swatch */
input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 4px;
}

/* Fix for Firefox inner swatch */
input[type="color"]::-moz-color-swatch {
  border: none;
  border-radius: 4px;
}

input[type="number"]:focus, 
select.selector:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Checkboxes */
input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* --- 7. Buttons --- */
button {
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  width: 100%;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  margin-bottom: 8px;
  box-shadow: var(--shadow-sm);
}

button:hover { background-color: var(--primary-hover); }
button:active { transform: translateY(1px); }

/* Specific Button Overrides */
#delete-button, #delete-fragmentation, #delete_extras {
  background-color: var(--danger);
}
#delete-button:hover, #delete-fragmentation:hover, #delete_extras:hover {
  background-color: var(--danger-hover);
}

#add-fragmentation, #merge_drones_btn {
  background-color: var(--success);
}
#add-fragmentation:hover, #merge_drones_btn:hover {
  background-color: var(--success-hover);
}

#save, #export_kml_3d, #export_kml_dipul {
  background-color: #475569;
}
#save:hover, #export_kml_3d:hover, #export_kml_dipul:hover {
  background-color: #334155;
}

/* --- 8. The Visual Map Legend --- */
.legend {
  background: rgba(255, 255, 255, 0.95);
  padding: 16px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  font-size: 0.85rem;
  line-height: 1.6;
  border: 1px solid var(--border);
  backdrop-filter: blur(4px);
}

.legend h4 {
  margin: 0 0 12px 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.legend i {
  width: 16px;
  height: 16px;
  display: inline-block;
  margin-right: 10px;
  border-radius: 4px;
  vertical-align: text-bottom;
}

.legend span {
  display: inline-block;
  vertical-align: middle;
}

/* Force the Geocoder search button back to the classic white Leaflet style */
.leaflet-touch .leaflet-control-geocoder-icon,
.leaflet-control-geocoder-icon {
    background-color: #ffffff !important;
    border-radius: 4px !important;
}

.leaflet-touch .leaflet-control-geocoder-icon:hover,
.leaflet-control-geocoder-icon:hover {
    background-color: #f4f4f4 !important;
}