/* Main layout */
main {
  min-height: calc(100vh - var(--navbar-h, 56px) - 120px);
}

/* Tab navigation */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--line, #ddd);
}

.tabs .tab {
  padding: 0.5rem 1.25rem;
  background: transparent !important;
  border: none;
  border-radius: 0;
  color: var(--muted, #888);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
}

.tabs .tab:hover {
  color: var(--ink, #444);
}

.tabs .tab.active {
  color: var(--ink, #111);
  border-bottom-color: var(--c-blue, #3b82f6);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.header-row .tabs {
  margin-bottom: 0;
}

.tab-content {
  padding: 1.5rem 0.5rem 1rem;
}

/* Preview — stays dark (simulates physical LED panel) */
.preview-wrapper {
  background: #111;
  border: 1px solid #333;
  border-radius: 8px;
  padding: 1.5rem;
  display: inline-block;
}

.preview-img {
  image-rendering: pixelated;
  display: block;
}

.preview-panels {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.preview-panel-card {
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 6px;
  padding: 0.75rem;
  text-align: center;
}

.preview-panel-card img {
  image-rendering: pixelated;
  display: block;
  margin: 0.5rem auto 0;
}

.preview-panel-card .label {
  font-size: 0.75rem;
  color: #aaa;
}

.preview-controls {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.preview-controls label {
  font-size: 0.85rem;
  color: #555;
}

.preview-controls select {
  padding: 0.3rem 0.5rem;
  background: #f5f5f5;
  border: 1px solid #ccc;
  border-radius: 4px;
  color: #333;
  font-size: 0.85rem;
}

/* Panel Config */
.config-form {
  max-width: 500px;
}

.config-form .field {
  margin-bottom: 1rem;
}

.config-form label {
  display: block;
  font-size: 0.85rem;
  color: #555;
  margin-bottom: 0.25rem;
}

.config-form input[type="number"] {
  width: 100%;
  padding: 0.4rem 0.6rem;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 4px;
  color: #222;
  font-size: 0.9rem;
}

.config-form .row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Chain order visual editor */
.chain-order-grid {
  display: inline-grid;
  gap: 4px;
  margin: 1rem 0;
}

.chain-order-cell {
  width: 60px;
  height: 40px;
  border: 2px solid #ccc;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: bold;
  color: #333;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: #f5f5f5;
}

.chain-order-cell:hover {
  border-color: var(--accent, #3b82f6);
}

.chain-order-cell.assigned {
  background: #dbeafe;
  border-color: var(--accent, #3b82f6);
  color: #1e40af;
}

/* Zone Manager */
.zone-canvas-wrapper {
  background: #111;
  border: 1px solid #333;
  border-radius: 8px;
  padding: 1rem;
  display: inline-block;
  position: relative;
}

.zone-canvas {
  position: relative;
  background: #000;
}

.zone-rect {
  position: absolute;
  border: 1px solid rgba(59, 130, 246, 0.7);
  background: rgba(59, 130, 246, 0.15);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.8);
  transition: background 0.15s;
  overflow: hidden;
  text-overflow: ellipsis;
}

.zone-rect:hover,
.zone-rect.selected {
  background: rgba(59, 130, 246, 0.3);
  border-color: rgba(59, 130, 246, 1);
}

.zone-list {
  margin-top: 1rem;
}

.zone-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  background: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 6px;
  margin-bottom: 0.5rem;
}

.zone-item .zone-type-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  background: #e0e7ff;
  color: #4338ca;
  text-transform: uppercase;
  font-weight: 600;
}

.zone-item .zone-info {
  flex: 1;
  font-size: 0.85rem;
  color: #333;
}

.zone-item .zone-coords {
  font-size: 0.75rem;
  color: #888;
}

/* Zone config modal/panel */
.zone-config-panel {
  background: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 1rem;
  margin-top: 1rem;
  max-width: 500px;
}

.zone-config-panel h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: #222;
}

.zone-config-panel .field {
  margin-bottom: 0.75rem;
}

.zone-config-panel label {
  display: block;
  font-size: 0.8rem;
  color: #555;
  margin-bottom: 0.2rem;
}

.zone-config-panel input,
.zone-config-panel select {
  width: 100%;
  padding: 0.35rem 0.5rem;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 4px;
  color: #222;
  font-size: 0.85rem;
}

/* Buttons */
.btn {
  padding: 0.4rem 1rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #f0f0f0;
  color: #333;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.15s;
}

.btn:hover {
  background: #e0e0e0;
}

.btn-primary {
  background: var(--accent, #3b82f6);
  border-color: var(--accent, #3b82f6);
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-danger {
  background: #dc2626;
  border-color: #dc2626;
  color: #fff;
}

.btn-danger:hover {
  background: #b91c1c;
}

.btn-sm {
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
}

/* Responsive */
@media (max-width: 768px) {
  .config-form .row {
    grid-template-columns: 1fr;
  }
}