/* Base Reset & Variables */
:root {
  --bg-dark: #0b0f19;
  --bg-card: #141c2e;
  --bg-card-hover: #1b263e;
  --bg-input: #0f172a;
  --border-color: #27354e;
  --border-focus: #3b82f6;
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent-blue: #3b82f6;
  --accent-amber: #f59e0b;
  --accent-emerald: #10b981;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Roboto Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.4);
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* App Header */
.app-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #3b82f6, #10b981);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: #ffffff;
  stroke-width: 2;
}

.brand h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
}

.brand .subtitle {
  font-size: 12px;
  color: var(--text-muted);
}

.header-badges {
  display: flex;
  gap: 8px;
}

.badge {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* App Main Layout */
.app-container {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 20px;
  padding: 20px;
  flex: 1;
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
}

@media (max-width: 1024px) {
  .app-container {
    grid-template-columns: 1fr;
  }
}

/* Map Display Area */
.map-view-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.viewport-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-subtle);
}

/* Viewport Controls Bar */
.viewport-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.mode-selector {
  display: flex;
  background: var(--bg-input);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  gap: 2px;
}

.mode-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mode-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.mode-btn.active {
  background: var(--accent-blue);
  color: #ffffff;
  font-weight: 600;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-input);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.zoom-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.zoom-btn:hover {
  color: var(--text-main);
}

.zoom-btn.active {
  background: var(--border-color);
  color: var(--accent-amber);
}

.tool-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.tool-btn:hover {
  background: var(--border-color);
  color: var(--text-main);
}

/* Canvas Wrapper */
.canvas-wrapper {
  position: relative;
  width: 100%;
  max-width: 720px;
  max-height: 720px;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  background: var(--bg-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

canvas#map-canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}

.panning-hint {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 11px;
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.1);
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Inspector Card */
.inspector-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  align-items: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-main);
}

.biome-swatch-badge {
  display: flex;
  align-items: center;
  gap: 8px;
}

.swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: inline-block;
}

/* Control Panel Sidebar */
.control-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-subtle);
}

.panel-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.panel-title .badge {
  font-size: 10px;
}

/* Form Controls */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
}

.val-tag {
  font-family: var(--font-mono);
  color: var(--accent-amber);
  font-weight: 600;
  font-size: 12px;
}

.input-row {
  display: flex;
  gap: 8px;
}

input[type="text"] {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: var(--font-mono);
  width: 100%;
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--border-focus);
}

select {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  width: 100%;
  cursor: pointer;
}

select:focus {
  outline: none;
  border-color: var(--border-focus);
}

/* Range Sliders */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: var(--bg-input);
  border-radius: 3px;
  outline: none;
  border: 1px solid var(--border-color);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-blue);
  cursor: pointer;
  transition: transform 0.1s ease;
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.5);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Toggle Checkbox Switch */
.switch-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
}

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

.slider-round {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  transition: .3s;
  border-radius: 22px;
}

.slider-round:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background-color: var(--text-muted);
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider-round {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
}

input:checked + .slider-round:before {
  transform: translateX(18px);
  background-color: #ffffff;
}

/* Biome Statistics Grid */
.biome-stats-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 4px;
}

.biome-stat-row {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.biome-stat-header {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
}

.biome-bar-track {
  height: 5px;
  background: var(--bg-input);
  border-radius: 3px;
  overflow: hidden;
}

.biome-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* Primary Action Buttons */
.action-btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #ffffff;
  border: none;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--border-color);
}

/* Elevation Paint Brush Buttons */
.paint-btn {
  border: 1px solid var(--border-color);
  background: var(--bg-input);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.paint-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-main);
  border-color: rgba(59, 130, 246, 0.4);
}

.paint-btn.active {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(37, 99, 235, 0.35)) !important;
  color: #60a5fa !important;
  border-color: #3b82f6 !important;
  font-weight: 600 !important;
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.35) !important;
  transform: translateY(-1px);
}