:root {
  --bg-primary: #1e1e24;
  --bg-secondary: #282832;
  --bg-panel: #2e2e3a;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-success: #10b981;
  --accent-amber: #f59e0b;
  --text-primary: #f3f4f6;
  --text-muted: #9ca3af;
  --border: #3f3f4e;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.app-header {
  height: 54px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand h1 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.header-actions {
  display: flex;
  gap: 0.6rem;
}

.btn {
  padding: 0.45rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary { background-color: var(--accent-success); color: #fff; }
.btn-primary:hover:not(:disabled) { background-color: #059669; }
.btn-secondary { background-color: var(--bg-panel); border-color: var(--border); color: var(--text-primary); }
.btn-secondary:hover:not(:disabled) { background-color: #3b3b4a; }
.btn-action { background-color: var(--accent); color: #fff; width: 100%; padding: 0.6rem; font-weight: 600; }
.btn-action:hover:not(:disabled) { background-color: var(--accent-hover); }
.btn-rapid {
  background-color: #4f46e5;
  color: #fff;
  width: 100%;
  padding: 0.55rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}
.btn-rapid:hover:not(:disabled) { background-color: #4338ca; }
.btn-rapid.sampling-active {
  background-color: #dc2626;
  animation: pulse-border 1.5s infinite;
}

.file-label { display: inline-flex; align-items: center; }

/* Workbench Grid */
.workbench {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 340px;
  height: calc(100vh - 54px);
  overflow: hidden;
  transition: grid-template-columns 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.workbench.sidebar-collapsed {
  grid-template-columns: 1fr 0px;
}

/* Canvas Viewport */
.canvas-panel {
  position: relative;
  background-color: #121217;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

canvas#mapCanvas {
  display: block;
  cursor: crosshair;
}

.canvas-overlay-controls {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: rgba(30, 30, 36, 0.85);
  padding: 0.35rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  z-index: 10;
}

.canvas-overlay-controls button {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  padding: 0.3rem 0.4rem;
  cursor: pointer;
  border-radius: 4px;
}
.canvas-overlay-controls button:hover { background-color: var(--bg-panel); }

.sidebar-toggle-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(30, 30, 36, 0.9);
  border: 1px solid var(--border);
  color: var(--text-primary);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all 0.2s ease;
}
.sidebar-toggle-btn:hover { background: var(--bg-panel); }
.workbench.sidebar-collapsed .sidebar-toggle-btn span { transform: rotate(180deg); display: inline-block; }

/* Status Toast Banner */
.toast-hint {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(20, 20, 26, 0.95);
  padding: 0.5rem 1.25rem;
  border-radius: 24px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-primary);
  border: 1px solid var(--accent);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  pointer-events: none;
  z-index: 15;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.toast-hint.sampling-target {
  border-color: #f59e0b;
  background: rgba(30, 27, 20, 0.96);
  color: #fbbf24;
  font-weight: 600;
  font-size: 0.88rem;
}

/* Sidebar */
.sidebar {
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.workbench.sidebar-collapsed .sidebar {
  opacity: 0;
  padding: 0;
  pointer-events: none;
}

.panel-section {
  background-color: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem;
}

.panel-section h3 {
  font-size: 0.9rem;
  font-weight: 600;
}

.section-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.muted {
  color: var(--text-muted);
  font-size: 0.75rem;
  line-height: 1.4;
}

.empty-legend-notice {
  text-align: center;
  padding: 1rem 0;
}

/* Calibration Controls */
.mode-toggle-group {
  display: flex;
  gap: 0.4rem;
  background: var(--bg-primary);
  padding: 0.25rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

.mode-btn {
  flex: 1;
  padding: 0.4rem 0.2rem;
  font-size: 0.72rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.mode-btn.active {
  background: var(--accent);
  color: #fff;
}

.box-instructions {
  background: rgba(59, 130, 246, 0.1);
  border: 1px dashed rgba(59, 130, 246, 0.4);
  padding: 0.5rem;
  border-radius: 6px;
  font-size: 0.72rem;
  color: #93c5fd;
  line-height: 1.35;
}

.pin-status-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.4rem;
}

.pin-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
}

.pin-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 20px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.68rem;
  color: #fff;
}
.pin-north { background-color: #ef4444; }
.pin-south { background-color: #10b981; }
.pin-west  { background-color: #3b82f6; }
.pin-east  { background-color: #f59e0b; }
.pin-mizo  { background-color: #ec4899; }
.pin-raj   { background-color: #8b5cf6; }
.pin-chil  { background-color: #06b6d4; }

/* Thematic Legend Cards */
.legend-cards-container {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 0.2rem;
}

.legend-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  transition: all 0.2s ease;
}

.legend-card-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow: hidden;
}

.legend-card-title {
  font-size: 0.78rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.legend-card-right {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.swatch-picker {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border: 1px solid #ffffff;
  border-radius: 4px;
  cursor: pointer;
  background: none;
  padding: 0;
}
.swatch-picker::-webkit-color-swatch-wrapper { padding: 0; }
.swatch-picker::-webkit-color-swatch { border: none; border-radius: 3px; }

.legend-card.sampling-target {
  border-color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.12);
  box-shadow: 0 0 0 1px var(--accent-amber);
}

@keyframes pulse-border {
  0% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.6); }
  70% { box-shadow: 0 0 0 6px rgba(220, 38, 38, 0); }
  100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0); }
}

/* Collapsible Advanced Accordion */
.advanced-accordion {
  background-color: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.advanced-accordion summary {
  padding: 0.75rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  transition: color 0.15s;
}

.advanced-accordion summary:hover {
  color: var(--text-primary);
}

.accordion-content {
  padding: 0 0.9rem 0.9rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 0.3rem;
  padding-top: 0.6rem;
}

.control-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.control-row label {
  font-size: 0.74rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

input[type="number"] {
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
}

input[type="range"] { accent-color: var(--accent); }