/* Theme Builder Modal */
.theme-builder-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  z-index: 199;
}
.theme-builder-overlay.open {
  opacity: 1;
  visibility: visible;
}

.theme-builder {
  position: fixed;
  inset: 20px;
  background: var(--mdb-color-bg);
  border-radius: var(--mdb-radius-xl);
  box-shadow: var(--mdb-shadow-xl);
  display: flex;
  flex-direction: column;
  transform: scale(0.95);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.2s ease, opacity 0.2s ease, visibility 0.2s ease;
  z-index: 200;
  overflow: hidden;
}
.theme-builder.open {
  transform: scale(1);
  opacity: 1;
  visibility: visible;
}

.theme-builder-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 24px 2px;
  background: var(--mdb-header-bg);
  border-bottom: 1px solid var(--mdb-color-border);
}
.theme-builder-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--mdb-header-text, #ffffff);
}
.theme-builder-header h2 .material-symbols-outlined {
  font-size: 24px;
  color: var(--mdb-color-primary);
}
.theme-builder-header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Icon-only toolbar buttons for theme builder */
.tb-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  background: transparent;
  border: none;
  border-radius: 4px;
  color: var(--mdb-color-text-muted);
  cursor: pointer;
  transition: filter 0.15s;
}
.tb-icon-btn:hover {
  filter: brightness(1.3);
}
.tb-icon-btn .material-symbols-outlined {
  font-size: 23px;
}

/* Dirty/unsaved save button highlight */
.tb-icon-btn.tb-btn-dirty {
  color: var(--mdb-highlight-color, #fbbf24) !important;
  animation: tb-pulse-dirty 5.625s cubic-bezier(0.33, 1, 0.68, 1) infinite;
}
@keyframes tb-pulse-dirty {
  0% { opacity: 0.6; }
  25% { opacity: 0.9; }
  100% { opacity: 0.6; }
}

.tb-btn-close {
  padding: 8px;
  background: none;
  border: none;
  color: var(--mdb-color-text-secondary);
  cursor: pointer;
  border-radius: var(--mdb-radius-sm);
  margin-left: 8px;
}
.tb-btn-close:hover {
  background: var(--mdb-color-bg-tertiary);
  color: var(--mdb-color-text);
}

.theme-builder-body {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* Controls Panel */
.tb-controls {
  width: 380px;
  flex-shrink: 0;
  background: var(--mdb-color-bg-secondary);
  border-right: 1px solid var(--mdb-color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--mdb-font-sans);
}

/* Tab Navigation */
.tb-tabs {
  display: flex;
  border-bottom: 1px solid var(--mdb-color-border);
  flex-shrink: 0;
}
.tb-tab {
  flex: 1;
  padding: 12px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--mdb-color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}
.tb-tab:hover {
  color: var(--mdb-color-text);
  background: var(--mdb-color-bg-tertiary);
}
.tb-tab.active {
  color: var(--mdb-color-primary);
  border-bottom-color: var(--mdb-color-primary);
}

.tb-tab-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}
.tb-tab-pane {
  display: none;
}
.tb-tab-pane.active {
  display: block;
}

.tb-section {
  margin-bottom: 24px;
}
.tb-section-header {
  font-size: 11px;
  font-weight: 600;
  color: var(--mdb-color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.tb-field {
  margin-bottom: 16px;
}
.tb-field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--mdb-color-text);
  margin-bottom: 6px;
}
.tb-field input[type="text"],
.tb-field input[type="number"],
.tb-field select {
  width: 100%;
  padding: 8px 12px;
  background: var(--mdb-color-bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--mdb-radius-md);
  font-size: 14px;
  color: var(--mdb-color-text);
}
.tb-field input:focus,
.tb-field select:focus {
  outline: none;
  border-color: var(--mdb-color-primary);
}

/* Color picker row */
.tb-color-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.tb-color-row label {
  flex: 1;
  font-size: 13px;
  color: var(--mdb-color-text);
}
.tb-color-picker {
  display: flex;
  align-items: center;
  gap: 8px;
}
.tb-color-picker input[type="color"] {
  width: 32px;
  height: 32px;
  padding: 0;
  border: 2px solid var(--mdb-color-border);
  border-radius: var(--mdb-radius-sm);
  cursor: pointer;
  background: transparent;
}
.tb-color-picker input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 2px;
}
.tb-color-picker input[type="color"]::-webkit-color-swatch {
  border-radius: 2px;
  border: none;
}
.tb-color-picker input[type="text"] {
  width: 80px;
  padding: 6px 8px;
  font-size: 12px;
  font-family: var(--mdb-font-mono);
  text-transform: uppercase;
}

/* Lightness slider */
.tb-slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.tb-slider-row label {
  width: 80px;
  font-size: 13px;
  color: var(--mdb-color-text);
}
.tb-slider-row input[type="range"] {
  flex: 1;
  height: 6px;
  background: var(--mdb-color-bg-tertiary);
  border-radius: 3px;
  -webkit-appearance: none;
}
.tb-slider-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: var(--mdb-color-primary);
  border-radius: 50%;
  cursor: pointer;
}
.tb-slider-row .slider-value {
  width: 50px;
  text-align: right;
  font-size: 12px;
  font-family: var(--mdb-font-mono);
  color: var(--mdb-color-text-secondary);
}

/* Base theme toggle */
.tb-base-toggle {
  display: flex;
  gap: 8px;
}
.tb-base-toggle button {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--mdb-color-border);
  background: var(--mdb-color-bg);
  color: var(--mdb-color-text-secondary);
  border-radius: var(--mdb-radius-md);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s ease;
}
.tb-base-toggle button:hover {
  border-color: var(--mdb-color-border-hover);
}
.tb-base-toggle button.active {
  background: var(--mdb-color-primary);
  border-color: var(--mdb-color-primary);
  color: white;
}

/* Typography Controls */
.tb-font-input {
  position: relative;
}
.tb-font-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  max-height: 180px;
  overflow-y: auto;
  background: var(--mdb-color-bg);
  border: 1px solid var(--mdb-color-border);
  border-top: none;
  border-radius: 0 0 var(--mdb-radius-md) var(--mdb-radius-md);
  z-index: 100;
  box-shadow: var(--mdb-shadow-md);
}
.tb-font-dropdown.open {
  display: block;
}
.tb-font-option {
  padding: 8px 12px;
  cursor: pointer;
  font-size: 13px;
  color: var(--mdb-color-text);
  transition: background 0.1s;
}
.tb-font-option:hover {
  background: var(--mdb-color-bg-tertiary);
}
.tb-font-category {
  padding: 6px 12px;
  font-size: 10px;
  font-weight: 600;
  color: var(--mdb-color-text-muted);
  text-transform: uppercase;
  background: var(--mdb-color-bg-secondary);
  letter-spacing: 0.5px;
}

.tb-heading-grid {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.tb-heading-grid th {
  padding: 0;
  text-align: center;
  font-weight: 500;
  color: var(--mdb-color-text-secondary);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.tb-heading-grid th:first-child {
  width: 28px;
}
.tb-heading-grid td {
  padding: 0;
}
.tb-heading-grid .tb-heading-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--mdb-color-text-secondary);
  text-align: center;
}
.tb-heading-grid input[type="number"],
.tb-heading-grid input[type="text"],
.tb-heading-grid select {
  width: 100%;
  padding: 5px 4px;
  font-size: 11px;
  text-align: center;
  background: var(--mdb-color-bg-tertiary);
  border: 1px solid transparent;
  border-radius: 0;
  color: var(--mdb-color-text);
}
.tb-heading-grid input:focus,
.tb-heading-grid select:focus {
  outline: none;
  border-color: var(--mdb-color-primary);
}
.tb-heading-grid .tb-h-color-wrap {
  display: flex;
  align-items: center;
  gap: 2px;
}
.tb-heading-grid input[type="color"] {
  width: 24px;
  height: 24px;
  padding: 1px;
  border: 1px solid var(--mdb-color-border);
  border-radius: 3px;
  background: var(--mdb-color-bg);
  cursor: pointer;
  flex-shrink: 0;
}
.tb-heading-grid input[type="color"]:disabled {
  opacity: 0.3;
  cursor: default;
}
.tb-heading-grid input[type="checkbox"].tb-h-color-check {
  width: 12px;
  height: 12px;
  margin: 0;
  cursor: pointer;
  flex-shrink: 0;
}
.tb-heading-grid .tb-h-font-cell { min-width: 60px; }
.tb-heading-grid .tb-h-color-cell { width: 46px; }
.tb-unit {
  font-size: 11px;
  color: var(--mdb-color-text-muted);
}

.tb-row {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}
.tb-row .tb-field {
  flex: 1;
  margin-bottom: 0;
}
.tb-row .tb-field input[type="number"] {
  width: 100%;
}

/* Preview Panel */
.tb-preview {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

.tb-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--mdb-color-bg-secondary);
  border-bottom: 1px solid var(--mdb-color-border);
  font-size: 12px;
  font-weight: 500;
  color: var(--mdb-color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tb-preview-header .tb-base-toggle {
  display: flex;
  gap: 2px;
  background: var(--mdb-color-bg-tertiary);
  border-radius: 6px;
  padding: 2px;
}

.tb-preview-header .tb-base-toggle button {
  padding: 4px 12px;
  border: none;
  background: transparent;
  color: var(--mdb-color-text-secondary);
  font-size: 11px;
  font-weight: 500;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-transform: none;
  letter-spacing: normal;
}

.tb-preview-header .tb-base-toggle button:hover {
  color: var(--mdb-color-text);
}

.tb-preview-header .tb-base-toggle button.active {
  background: var(--mdb-color-primary);
  color: white;
}

.tb-preview-content {
  flex: 1;
  overflow: auto;
  padding: 24px;
}

.tb-preview-frame {
  background: var(--tb-preview-bg, var(--mdb-color-bg));
  color: var(--tb-preview-text, var(--mdb-color-text));
  border: 1px solid var(--tb-preview-border, var(--mdb-color-border));
  border-radius: var(--mdb-radius-lg);
  min-height: 100%;
  padding: var(--tb-preview-padding-top, 24px) 24px var(--tb-preview-padding-bottom, 24px);
  font-family: var(--tb-preview-body-font, inherit);
  font-size: var(--tb-preview-body-size, 16px);
  line-height: var(--tb-preview-body-line-height, 1.7);
}

/* Preview content elements */
.tb-preview-frame h1,
.tb-preview-frame h2,
.tb-preview-frame h3,
.tb-preview-frame h4,
.tb-preview-frame h5,
.tb-preview-frame h6 {
  font-family: var(--tb-preview-heading-font, inherit);
  color: var(--tb-preview-text, var(--mdb-color-text));
  margin: 0;
}
.tb-preview-frame h1 {
  font-size: var(--tb-preview-h1-size, 2rem);
  font-weight: var(--tb-preview-h1-weight, 700);
  font-family: var(--tb-preview-h1-font, var(--tb-preview-heading-font, inherit));
  color: var(--tb-preview-h1-color, var(--tb-preview-text, var(--mdb-color-text)));
  padding-top: var(--tb-preview-h1-padding-top, 0.5em);
  padding-bottom: var(--tb-preview-h1-padding-bottom, 0.5em);
}
/* Collapse first element top spacing so document padding is the only top spacing */
.tb-preview-frame > :first-child {
  margin-top: 0 !important;
  padding-top: 0 !important;
}
.tb-preview-frame h2 {
  font-size: var(--tb-preview-h2-size, 1.5rem);
  font-weight: var(--tb-preview-h2-weight, 600);
  font-family: var(--tb-preview-h2-font, var(--tb-preview-heading-font, inherit));
  color: var(--tb-preview-h2-color, var(--tb-preview-text, var(--mdb-color-text)));
  padding-top: var(--tb-preview-h2-padding-top, 1.5em);
  padding-bottom: var(--tb-preview-h2-padding-bottom, 0.5em);
}
.tb-preview-frame h3 {
  font-size: var(--tb-preview-h3-size, 1.25rem);
  font-weight: var(--tb-preview-h3-weight, 600);
  font-family: var(--tb-preview-h3-font, var(--tb-preview-heading-font, inherit));
  color: var(--tb-preview-h3-color, var(--tb-preview-text, var(--mdb-color-text)));
  padding-top: var(--tb-preview-h3-padding-top, 1em);
  padding-bottom: var(--tb-preview-h3-padding-bottom, 0.5em);
}
.tb-preview-frame h4 {
  font-size: var(--tb-preview-h4-size, 1.125rem);
  font-weight: var(--tb-preview-h4-weight, 600);
  font-family: var(--tb-preview-h4-font, var(--tb-preview-heading-font, inherit));
  color: var(--tb-preview-h4-color, var(--tb-preview-text, var(--mdb-color-text)));
  padding-top: var(--tb-preview-h4-padding-top, 1em);
  padding-bottom: var(--tb-preview-h4-padding-bottom, 0.25em);
}
.tb-preview-frame h5 {
  font-size: var(--tb-preview-h5-size, 1rem);
  font-weight: var(--tb-preview-h5-weight, 600);
  font-family: var(--tb-preview-h5-font, var(--tb-preview-heading-font, inherit));
  color: var(--tb-preview-h5-color, var(--tb-preview-text, var(--mdb-color-text)));
  padding-top: var(--tb-preview-h5-padding-top, 0.75em);
  padding-bottom: var(--tb-preview-h5-padding-bottom, 0.25em);
}
.tb-preview-frame h6 {
  font-size: var(--tb-preview-h6-size, 0.9rem);
  font-weight: var(--tb-preview-h6-weight, 600);
  font-family: var(--tb-preview-h6-font, var(--tb-preview-heading-font, inherit));
  color: var(--tb-preview-h6-color, var(--tb-preview-text, var(--mdb-color-text)));
  padding-top: var(--tb-preview-h6-padding-top, 0.5em);
  padding-bottom: var(--tb-preview-h6-padding-bottom, 0.25em);
}
.tb-preview-frame p {
  margin-bottom: 12px;
  line-height: 1.6;
  color: var(--tb-preview-text-secondary, var(--mdb-color-text-secondary));
}
.tb-preview-frame a {
  color: var(--tb-preview-primary, var(--mdb-color-primary));
  text-decoration: none;
}
.tb-preview-frame a:hover {
  text-decoration: underline;
}
.tb-preview-frame blockquote {
  border-left: 3px solid var(--tb-preview-primary, var(--mdb-color-primary));
  margin: 16px 0;
  padding: 8px 16px;
  background: var(--tb-preview-bg-secondary, var(--mdb-color-bg-secondary));
  color: var(--tb-preview-text-secondary, var(--mdb-color-text-secondary));
}
.tb-preview-frame code {
  background: var(--tb-preview-code-bg, var(--mdb-color-bg-tertiary));
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--tb-preview-code-font, var(--mdb-font-mono));
  font-size: var(--tb-preview-code-size, 0.9em);
  color: var(--tb-preview-text-muted, var(--mdb-color-text-muted));
}
.tb-preview-frame pre {
  background: var(--tb-preview-code-bg, var(--mdb-color-bg-tertiary));
  padding: 16px;
  border-radius: var(--mdb-radius-md);
  overflow-x: auto;
  margin: 16px 0;
  line-height: var(--tb-preview-code-line-height, 1.5);
}
.tb-preview-frame pre code {
  background: none;
  padding: 0;
  font-size: var(--tb-preview-code-size, 14px);
  color: var(--tb-preview-text-muted, var(--mdb-color-text-muted));
}

/* Preview table */
.tb-preview-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-family: var(--tb-preview-table-font, inherit);
  font-size: var(--tb-preview-table-size, 14px);
}
.tb-preview-table th {
  background: var(--tb-preview-table-header-bg, var(--mdb-color-bg-tertiary));
  font-weight: var(--tb-preview-table-header-weight, 600);
  text-align: left;
  padding: var(--tb-preview-table-padding, 10px) 12px;
  border: 1px solid var(--tb-preview-border, var(--mdb-color-border));
}
.tb-preview-table td {
  padding: var(--tb-preview-table-padding, 10px) 12px;
  border: 1px solid var(--tb-preview-border, var(--mdb-color-border));
}
.tb-preview-table tbody tr:nth-child(odd) {
  background: var(--tb-preview-table-row-bg, var(--mdb-color-bg));
}
.tb-preview-table tbody tr:nth-child(even) {
  background: var(--tb-preview-table-row-alt-bg, var(--mdb-color-bg-secondary));
}

/* Preview buttons */
.tb-preview-buttons {
  display: flex;
  gap: 8px;
  margin: 20px 0;
}
.tb-preview-btn {
  padding: 8px 16px;
  border-radius: var(--mdb-radius-md);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.tb-preview-btn-primary {
  background: var(--tb-preview-primary, var(--mdb-color-primary));
  border: 1px solid var(--tb-preview-primary, var(--mdb-color-primary));
  color: white;
}
.tb-preview-btn-secondary {
  background: var(--tb-preview-bg-secondary, var(--mdb-color-bg-secondary));
  border: 1px solid var(--tb-preview-border, var(--mdb-color-border));
  color: var(--tb-preview-text, var(--mdb-color-text));
}

/* Preview sidebar mock */
.tb-preview-sidebar-mock {
  display: flex;
  gap: 16px;
  margin-top: 24px;
}
.tb-preview-sidebar {
  width: 200px;
  background: var(--tb-preview-bg-secondary, var(--mdb-color-bg-secondary));
  border-radius: var(--mdb-radius-md);
  padding: 16px;
}
.tb-preview-sidebar h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tb-preview-text-muted, var(--mdb-color-text-muted));
  margin-bottom: 12px;
}
.tb-preview-sidebar-item {
  padding: 8px 12px;
  margin-bottom: 4px;
  border-radius: var(--mdb-radius-sm);
  font-size: 13px;
  color: var(--tb-preview-text-secondary, var(--mdb-color-text-secondary));
}
.tb-preview-sidebar-item.active {
  background: var(--tb-preview-bg-tertiary, var(--mdb-color-bg-tertiary));
  color: var(--tb-preview-text, var(--mdb-color-text));
}
.tb-preview-main {
  flex: 1;
  background: var(--tb-preview-bg-secondary, var(--mdb-color-bg-secondary));
  border-radius: var(--mdb-radius-md);
  padding: 16px;
}
.tb-preview-card {
  background: var(--tb-preview-bg, var(--mdb-color-bg));
  border: 1px solid var(--tb-preview-border, var(--mdb-color-border));
  border-radius: var(--mdb-radius-md);
  padding: 16px;
  margin-bottom: 12px;
}
.tb-preview-card h5 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--tb-preview-text, var(--mdb-color-text));
}
.tb-preview-card p {
  font-size: 13px;
  margin: 0;
}

/* Status badges preview */
.tb-preview-status-row {
  display: flex;
  gap: 8px;
  margin: 16px 0;
  flex-wrap: wrap;
}
.tb-preview-status {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
}