.jse-host {
  display: block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";

  /* Default Theme Variables (Light Mode) */
  --jse-bg: #ffffff;
  --jse-bg-secondary: #f3f4f6;
  --jse-bg-tertiary: #e5e7eb;

  --jse-text-primary: #111827;
  --jse-text-secondary: #4b5563;
  --jse-text-tertiary: #9ca3af;

  --jse-border: #e5e7eb;
  --jse-border-focus: #6366f1;

  --jse-primary: #4f46e5;
  --jse-primary-hover: #4338ca;
  --jse-primary-text: #ffffff;

  --jse-danger: #dc2626;
  --jse-danger-bg: #fef2f2;
  --jse-danger-border: #fecaca;

  --jse-success: #059669;
  --jse-success-bg: #ecfdf5;

  --jse-radius: 0.375rem;
  --jse-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --jse-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

@media (prefers-color-scheme: dark) {
  .jse-host {
    --jse-bg: #111827;
    --jse-bg-secondary: #1f2937;
    --jse-bg-tertiary: #374151;

    --jse-text-primary: #f9fafb;
    --jse-text-secondary: #d1d5db;
    --jse-text-tertiary: #9ca3af;

    --jse-border: #374151;
    --jse-border-focus: #818cf8;

    --jse-primary: #6366f1;
    --jse-primary-hover: #818cf8;

    --jse-danger: #ef4444;
    --jse-danger-bg: #450a0a;
    --jse-danger-border: #7f1d1d;

    --jse-success: #10b981;
    --jse-success-bg: #064e3b;
  }
}

/* Layout & Containers */
.jse-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  color: var(--jse-text-primary);
  background-color: var(--jse-bg);
  min-height: 100vh;
  padding: 0 1rem;
}

.jse-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--jse-border);
}

.jse-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 9999px;
  background-color: var(--jse-bg-secondary);
  color: var(--jse-text-secondary);
  border: 1px solid var(--jse-border);
}

.jse-badge-info {
  background-color: var(--jse-bg-tertiary);
  color: var(--jse-text-primary);
}

.jse-badge-logic {
  background-color: var(--jse-danger-bg);
  color: var(--jse-danger);
  border-color: var(--jse-danger-border);
}

.jse-tabs {
  display: flex;
  gap: 0.25rem;
  background-color: var(--jse-bg-secondary);
  padding: 0.25rem;
  border-radius: var(--jse-radius);
  border: 1px solid var(--jse-border);
}

.jse-tab-btn {
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: calc(var(--jse-radius) - 2px);
  border: none;
  background: transparent;
  color: var(--jse-text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.jse-tab-btn:hover {
  color: var(--jse-text-primary);
}

.jse-tab-btn.active {
  background-color: var(--jse-bg);
  color: var(--jse-primary);
  box-shadow: var(--jse-shadow-sm);
}

/* Buttons */
.jse-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--jse-radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.jse-btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

.jse-btn-primary {
  background-color: var(--jse-primary);
  color: var(--jse-primary-text);
  box-shadow: var(--jse-shadow-sm);
}

.jse-btn-primary:hover {
  background-color: var(--jse-primary-hover);
}

.jse-btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.jse-btn-secondary {
  background-color: transparent;
  color: var(--jse-text-secondary);
  border: 1px dashed var(--jse-border);
}

.jse-btn-secondary:hover {
  background-color: var(--jse-bg-secondary);
  border-color: var(--jse-text-tertiary);
  color: var(--jse-text-primary);
}

.jse-btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  color: var(--jse-text-tertiary);
  background: transparent;
  border: none;
  border-radius: var(--jse-radius);
  cursor: pointer;
  transition: color 0.2s;
}

.jse-btn-icon:hover {
  color: var(--jse-text-primary);
  background-color: var(--jse-bg-secondary);
}

.jse-btn-delete:hover {
  color: var(--jse-danger);
  background-color: var(--jse-danger-bg);
}

/* Node Structure */
.jse-node-container {
  margin-left: 1rem;
  padding-left: 1rem;
  border-left: 2px solid var(--jse-border);
  position: relative;
}

.jse-node-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  padding: 0.5rem 0;
}

.jse-node-toggle {
  position: absolute;
  left: -1rem;
  width: 1rem;
  height: 1rem;
  transform: translateX(-50%);
  background-color: var(--jse-bg);
  border: 1px solid var(--jse-border);
  border-radius: 50%;
  color: var(--jse-text-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
}

.jse-node-toggle:hover {
  color: var(--jse-primary);
  border-color: var(--jse-primary);
}

.jse-node-toggle.jse-collapsed {
   transform: translateX(-50%) rotate(-90deg);
}

.jse-type-select {
  background-color: var(--jse-bg-secondary);
  border: 1px solid transparent;
  border-radius: var(--jse-radius);
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
  color: var(--jse-text-primary);
  cursor: pointer;
}

.jse-type-select:hover {
  background-color: var(--jse-bg-tertiary);
}

.jse-type-select:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--jse-primary);
}

.jse-title-input {
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--jse-radius);
  padding: 0.375rem 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--jse-text-primary);
  width: 12rem;
  transition: border-color 0.2s;
}

.jse-title-input:hover, .jse-title-input:focus {
  border-color: var(--jse-border);
  background-color: var(--jse-bg);
}

.jse-title-input:focus {
  border-color: var(--jse-border-focus);
  outline: none;
}

.jse-description-container {
  flex: 1;
  min-width: 200px;
}

.jse-description-collapsed, .jse-description-expanded {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
}

.jse-description-input {
  flex: 1;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--jse-radius);
  padding: 0.375rem 0.5rem;
  font-size: 0.875rem;
  color: var(--jse-text-secondary);
  transition: all 0.2s;
}

.jse-description-input:hover, .jse-description-input:focus {
  border-color: var(--jse-border);
  color: var(--jse-text-primary);
}

.jse-description-input:focus {
  border-color: var(--jse-border-focus);
  outline: none;
}

.jse-description-textarea {
  flex: 1;
  width: 100%;
  min-height: 4rem;
  background-color: var(--jse-bg);
  border: 1px solid var(--jse-border);
  border-radius: var(--jse-radius);
  padding: 0.5rem;
  font-family: inherit;
  font-size: 0.875rem;
  color: var(--jse-text-primary);
  resize: vertical;
}

.jse-description-textarea:focus {
  outline: none;
  border-color: var(--jse-border-focus);
}

.jse-constraints-container {
  background-color: var(--jse-bg-secondary);
  border: 1px solid var(--jse-border);
  border-radius: var(--jse-radius);
  padding: 1rem;
  margin-bottom: 1rem;
}

.jse-constraints-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}

.jse-constraint-field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.jse-constraint-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--jse-text-tertiary);
}

.jse-constraint-input {
  background-color: var(--jse-bg);
  border: 1px solid var(--jse-border);
  border-radius: var(--jse-radius);
  padding: 0.375rem 0.5rem;
  font-size: 0.875rem;
  color: var(--jse-text-primary);
  width: 100%;
}

.jse-constraint-input:focus {
  outline: none;
  border-color: var(--jse-border-focus);
}

.jse-input-error {
  border-color: var(--jse-danger);
}

.jse-error-message {
  font-size: 0.75rem;
  color: var(--jse-danger);
}

.jse-btn-toggle-constraints.jse-active {
  color: var(--jse-primary);
  background-color: var(--jse-bg-secondary);
}

.jse-enum-container {
  grid-column: 1 / -1;
  padding-top: 1rem;
  margin-top: 0.5rem;
  border-top: 1px dashed var(--jse-border);
}

.jse-enum-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.jse-enum-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background-color: var(--jse-bg);
  border: 1px solid var(--jse-border);
  border-radius: var(--jse-radius);
  padding: 0.25rem 0.5rem;
}

.jse-enum-input {
  border: none;
  background: transparent;
  color: var(--jse-text-primary);
  font-size: 0.875rem;
  width: auto;
  min-width: 3rem;
}

.jse-enum-input:focus {
  outline: none;
}

.jse-properties-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.jse-object-controls {
  padding: 0.5rem;
  background-color: var(--jse-bg-secondary);
  border-radius: var(--jse-radius);
  margin-bottom: 0.5rem;
}

.jse-strict-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--jse-text-secondary);
  cursor: pointer;
}

.jse-property-item {
  background-color: var(--jse-bg);
  border: 1px solid var(--jse-border);
  border-radius: var(--jse-radius);
  padding: 0.75rem;
  position: relative;
}

.jse-property-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.jse-property-content {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.jse-property-key-input {
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--jse-radius);
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--jse-text-primary);
  transition: all 0.2s;
}

.jse-property-key-input:hover {
  background-color: var(--jse-bg-secondary);
}

.jse-property-key-input:focus {
  outline: none;
  background-color: var(--jse-bg);
  border-color: var(--jse-border-focus);
}

.jse-required-checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--jse-text-tertiary);
  cursor: pointer;
  text-transform: uppercase;
}

.jse-required-checkbox-label:hover {
  color: var(--jse-text-primary);
}

.jse-array-items-container, .jse-logic-container {
  background-color: var(--jse-bg-secondary);
  border: 1px solid var(--jse-border);
  border-radius: var(--jse-radius);
  padding: 1rem;
  margin-top: 1rem;
}

.jse-logic-header, .jse-array-items-header {
  margin-bottom: 1rem;
}

.jse-logic-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.jse-logic-branch {
  background-color: var(--jse-bg);
  border: 1px solid var(--jse-border);
  border-radius: var(--jse-radius);
  padding: 1rem;
}

.jse-logic-branch-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--jse-border);
  margin-bottom: 0.5rem;
}

.jse-logic-branch-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--jse-text-tertiary);
  text-transform: uppercase;
}

/* Preview Panel */
.jse-preview-panel {
  background-color: var(--jse-bg-secondary);
  border: 1px solid var(--jse-border);
  border-radius: var(--jse-radius);
  overflow: hidden;
}

.jse-preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background-color: var(--jse-bg-tertiary);
  border-bottom: 1px solid var(--jse-border);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--jse-text-primary);
}

.jse-preview-content {
  padding: 1rem;
  overflow: auto;
  max-height: 80vh;
}

.jse-code-block {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.875rem;
  color: var(--jse-text-primary);
  white-space: pre-wrap;
}

.jse-btn-copy {
  background-color: var(--jse-bg);
  border: 1px solid var(--jse-border);
  border-radius: var(--jse-radius);
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--jse-text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.jse-btn-copy:hover {
  background-color: var(--jse-bg-secondary);
  color: var(--jse-text-primary);
}

.jse-btn-copy.jse-copied {
  background-color: var(--jse-success);
  border-color: var(--jse-success);
  color: #ffffff;
}

/* Utilities */
.jse-icon {
  width: 1.25rem;
  height: 1.25rem;
}

.jse-icon-sm {
  width: 1rem;
  height: 1rem;
}

.jse-icon-xs {
  width: 0.875rem;
  height: 0.875rem;
}

.jse-icon-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background-color: var(--jse-bg-tertiary);
  color: var(--jse-text-secondary);
}

.jse-icon-circle-logic {
  background-color: var(--jse-danger-bg);
  color: var(--jse-danger);
}

.jse-add-property-container {
  margin-top: 0.5rem;
  display: flex;
  justify-content: center;
}