:root {
  --primary-color: #3498db;
  --secondary-color: #2ecc71;
  --light-gray: #f5f5f5;
  --border-color: #ddd;
  --text-color: #333;
  --shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  --hover-bg: #f0f0f0;
  --level-colors: #3498db, #2ecc71, #9b59b6, #e67e22, #f1c40f;
  --danger-color: #e74c3c;
  --warning-color: #f39c12;
  --info-color: #2980b9;
  --light-color: #ecf0f1;
  --dark-color: #34495e;
  --success-color: #27ae60;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: var(--font-main);
  line-height: 1.6;
  color: var(--text-color);
  background-color: #f5f5f5;
  padding: 20px;
}
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}
header {
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
}
h1, h2, h3, h4 {
  margin-bottom: 15px;
  color: var(--dark-color);
}
h1 {
  text-align: center;
  margin-bottom: 30px;
  color: var(--primary-color);
}
h2 {
  font-size: 1.4rem;
}
h3 {
  font-size: 1.1rem;
}
/* Toolbar Styles */
.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  background-color: var(--light-gray);
  color: var(--text-color);
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  transition: all 0.3s ease;
}
.btn:hover {
  background-color: var(--hover-bg);
  opacity: 0.9;
}
.btn-primary {
  background-color: var(--primary-color);
  color: white;
}
.btn-primary:hover {
  background-color: #2980b9;
}
.btn-success {
  background-color: var(--success-color);
  color: white;
}
.btn-danger {
  background-color: var(--danger-color);
  color: white;
}
.btn-info {
  background-color: var(--info-color);
  color: white;
}
/* App Container */
.app-container {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
}
.tree-wrapper {
  flex: 3;
  background: white;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.sidebar {
  flex: 2;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.info-panel {
  background: white;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.code-block {
  background: #f4f4f4;
  padding: 15px;
  border-radius: 4px;
  font-family: Monaco, Consolas, "Courier New", monospace;
  font-size: 12px;
  overflow-x: auto;
  max-height: 400px;
  overflow-y: auto;
}
/* TreeManager Styles */
.tree {
  user-select: none;
}
.tree-item {
  margin-bottom: 5px;
  transition: all 0.2s;
}
.tree-content {
  display: flex;
  align-items: center;
  padding: 8px 10px;
  border-radius: 4px;
  background-color: var(--light-gray);
  border: 1px solid #eee;
  cursor: move;
  transition: all 0.2s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.tree-content:hover {
  background-color: #e9ecef;
  border-left-color: var(--primary-color);
}
.collapse-btn {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  margin-right: 5px;
  transition: transform 0.2s;
}
.collapse-btn:hover {
  color: var(--primary-color);
}
.collapsed .collapse-btn {
  transform: rotate(-90deg);
}
.tree-children {
  margin-left: 25px;
  padding-left: 10px;
  border-left: 1px dashed #ccc;
  margin-top: 5px;
  transition: all 0.3s ease;
}
.tree-item.collapsed > .tree-children {
  display: none;
}
.tree-label {
  flex-grow: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  border-radius: 4px;
  cursor: grab;
  padding: 4px 8px;
  transition: background-color 0.2s;
}
.tree-label:hover {
  background-color: rgba(52, 152, 219, 0.1);
}
.tree-label:active {
  cursor: grabbing;
}
.tree-label:hover::after {
  opacity: 0.8;
}
.tree-name {
  padding: 5px 10px;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  flex-grow: 1;
  font-family: inherit;
  font-size: inherit;
  outline: none;
  min-width: 0;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  cursor: text;
}
.tree-name:focus {
  border-color: var(--primary-color);
  outline: none;
  background: white;
}
.tree-level-tag {
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
  background-color: var(--light-color);
  color: var(--dark-color);
  font-weight: 500;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  min-width: 1rem;
}
.level-1 .tree-level-tag {
  background-color: #3498db;
  color: white;
}
.level-2 .tree-level-tag {
  background-color: #9b59b6;
  color: white;
}
.level-3 .tree-level-tag {
  background-color: #e67e22;
  color: white;
}
.level-4 .tree-level-tag {
  background-color: #e67e22;
}
.level-5 .tree-level-tag {
  background-color: #f1c40f;
}
.level-6 .tree-level-tag {
  background-color: #1abc9c;
}
.level-7 .tree-level-tag {
  background-color: #d35400;
}
.level-8 .tree-level-tag {
  background-color: #8e44ad;
}
.level-9 .tree-level-tag {
  background-color: #27ae60;
}
.level-10 .tree-level-tag {
  background-color: #c0392b;
}
.tree-actions-menu {
  display: flex;
  gap: 5px;
  margin-left: 5px;
  opacity: 0.3;
  transition: opacity 0.3s ease;
  flex-shrink: 0;
}
.tree-content:hover .tree-actions-menu {
  opacity: 1;
}
.tree-action-btn {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: #666;
  border-radius: 4px;
  padding: 0;
  transition: all 0.2s;
}
.tree-action-btn:hover {
  background-color: rgba(0, 0, 0, 0.1);
  color: var(--dark-color);
  transform: scale(1.1);
}
/* Drag & Drop Styles */
.dragging {
  opacity: 0.5;
}
.drag-ghost {
  opacity: 0.7;
  background-color: #fff;
  padding: 8px 10px;
  border-radius: 6px;
  width: 300px;
  position: absolute;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  pointer-events: none;
  z-index: 1000;
  border-left: 3px solid var(--primary-color);
  transform: rotate(2deg);
}
.valid-drop-target {
  border: 1px dashed var(--primary-color);
}
.over-before, .over-after, .over-inside {
  position: relative;
}
.over-before {
  border-top: 2px solid var(--primary-color) !important;
}
.over-after {
  border-bottom: 2px solid var(--primary-color) !important;
}
.over-inside {
  background-color: rgba(52, 152, 219, 0.1);
  border: 2px dashed var(--primary-color);
}
/* Animation */
@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(52, 152, 219, 0.4);
  }
  70% {
    box-shadow: 0 0 0 5px rgba(52, 152, 219, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(52, 152, 219, 0);
  }
}
@keyframes glow {
  from {
    box-shadow: 0 0 2px rgba(52, 152, 219, 0.2);
  }
  to {
    box-shadow: 0 0 8px rgba(52, 152, 219, 0.8);
  }
}
/* Zone Details */
.zone-details {
  background: white;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.zone-detail-card {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}
.zone-detail-card h3 {
  background-color: var(--primary-color);
  color: white;
  padding: 10px 15px;
  margin: 0;
}
.zone-detail-table {
  width: 100%;
  border-collapse: collapse;
}
.zone-detail-table th,
.zone-detail-table td {
  padding: 10px 15px;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}
.zone-detail-table th {
  width: 30%;
  background-color: #f4f4f4;
}
.zone-detail-actions {
  padding: 15px;
  display: flex;
  justify-content: center;
  gap: 10px;
}
/* Message Container */
#message-container {
  margin-top: 10px;
}
.alert {
  padding: 10px 15px;
  border-radius: 4px;
  margin-bottom: 10px;
  transition: opacity 0.5s ease;
}
.alert-success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}
.alert-info {
  background-color: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}
.alert-warning {
  background-color: #fff3cd;
  color: #856404;
  border: 1px solid #ffeeba;
}
.alert-error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}
/* Usage Examples */
.usage-examples {
  background: white;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  margin-top: 30px;
}
.example-section {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}
.example-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}
.code-example {
  margin-top: 15px;
  background: #f8f9fa;
  border-radius: 8px;
  padding: 15px;
  border: 1px solid #eee;
}
.code-example h4 {
  margin-top: 0;
  margin-bottom: 10px;
  color: var(--dark-color);
}
/* Responsive */
@media (max-width: 992px) {
  .app-container {
    flex-direction: column;
  }
  .tree-wrapper, .sidebar {
    width: 100%;
  }
}
@media (max-width: 768px) {
  .tree-actions, .json-actions {
    flex-direction: column;
  }
  .level-name-row {
    flex-direction: column;
    align-items: flex-start;
  }
  .level-name-row label {
    margin-bottom: 5px;
  }
  .tree-action-btn {
    width: 36px;
    height: 36px;
  }
  .tree-actions-menu {
    opacity: 1;
  }
  .tree-children {
    margin-left: 20px;
    padding-left: 20px;
  }
}
/* Highlight โหนดที่สามารถรับการวางได้ */
.valid-drop-target > .tree-content {
  background-color: rgba(52, 152, 219, 0.05);
  transition: background-color 0.3s;
}
/* เอฟเฟกต์เมื่อโหนดกำลังถูกลาก */
.dragging {
  opacity: 0.5;
}
/* เอฟเฟกต์เมื่อวางที่ตำแหน่งต่างๆ */
.over-before {
  border-top: 2px solid var(--primary-color) !important;
}
.over-after {
  border-bottom: 2px solid var(--primary-color) !important;
}
.over-inside {
  background-color: rgba(52, 152, 219, 0.15) !important;
  border: 1px dashed var(--primary-color) !important;
}