/* FrontmatterForm Panel */
.wn-frontmatter-panel {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  border-left: 1px solid var(--wn-overlay-10);
  background-color: var(--wn-zinc-900);
  overflow: hidden;
  transition: width var(--wn-transition-slow) ease-in-out;
}

.wn-frontmatter-panel--open {
  width: var(--wn-panel-md);
}

.wn-frontmatter-panel--closed {
  width: 0;
  border-left: none;
}

.wn-frontmatter-panel-inner {
  display: flex;
  flex-direction: column;
  width: var(--wn-panel-md);
  height: 100%;
}

/* Panel Header */
.wn-frontmatter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--wn-space-3) var(--wn-space-4);
  border-bottom: 1px solid var(--wn-overlay-10);
}

.wn-frontmatter-title {
  display: flex;
  align-items: center;
  gap: var(--wn-space-3);
  font-size: var(--wn-font-base);
  font-weight: 600;
  color: var(--wn-zinc-50);
}

.wn-frontmatter-badge {
  font-size: var(--wn-font-xs);
  font-weight: 500;
  padding: var(--wn-space-1) var(--wn-space-2);
  border-radius: var(--wn-radius-sm);
  background-color: var(--wn-overlay-10);
  color: var(--wn-zinc-500);
}

.wn-frontmatter-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--wn-icon-btn-md);
  height: var(--wn-icon-btn-md);
  border-radius: var(--wn-radius-md);
  border: none;
  background: transparent;
  color: var(--wn-zinc-500);
  cursor: pointer;
  transition: all var(--wn-transition-fast) ease;
}

.wn-frontmatter-close:hover {
  background: var(--wn-overlay-10);
  color: #fff;
}

/* Panel Content */
.wn-frontmatter-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--wn-space-4);
  /* Scroll indicator - fade effect at bottom when scrollable */
  mask-image: linear-gradient(
    to bottom,
    black calc(100% - var(--wn-space-7)),
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    to bottom,
    black calc(100% - var(--wn-space-7)),
    transparent 100%
  );
}

/* Remove mask when scrolled to bottom or content fits */
.wn-frontmatter-content:not(:has(.wn-frontmatter-fields)) {
  mask-image: none;
  -webkit-mask-image: none;
}

/* Empty State */
.wn-frontmatter-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: var(--wn-space-7);
  text-align: center;
}

.wn-frontmatter-empty-icon {
  margin-bottom: var(--wn-space-4);
  opacity: 0.3;
  color: var(--wn-zinc-500);
}

.wn-frontmatter-empty-text {
  font-size: var(--wn-font-base);
  font-weight: 500;
  color: var(--wn-zinc-500);
  margin-bottom: var(--wn-space-1);
}

.wn-frontmatter-empty-hint {
  font-size: var(--wn-font-xs);
  color: var(--wn-zinc-600);
}

/* Form Fields */
.wn-frontmatter-fields {
  display: flex;
  flex-direction: column;
  gap: var(--wn-space-4);
}

.wn-frontmatter-field {
  display: flex;
  flex-direction: column;
  gap: var(--wn-space-1);
}

.wn-frontmatter-field--full {
  grid-column: span 2;
}

.wn-frontmatter-field--row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--wn-space-4);
}

.wn-frontmatter-label {
  font-size: var(--wn-font-xs);
  font-weight: 600;
  color: var(--wn-zinc-500);
}

.wn-frontmatter-required {
  color: var(--wn-error-500);
  margin-left: var(--wn-space-1);
}

.wn-frontmatter-input,
.wn-frontmatter-textarea,
.wn-frontmatter-select {
  padding: var(--wn-space-3);
  background: var(--wn-zinc-950);
  border: 1px solid var(--wn-overlay-10);
  border-radius: var(--wn-radius-md);
  color: var(--wn-zinc-50);
  font-size: var(--wn-font-sm);
  font-family: inherit;
  transition: border-color var(--wn-transition-fast) ease;
}

.wn-frontmatter-input:focus,
.wn-frontmatter-textarea:focus,
.wn-frontmatter-select:focus {
  outline: none;
  border-color: var(--wn-brand-500);
}

.wn-frontmatter-input:disabled,
.wn-frontmatter-textarea:disabled,
.wn-frontmatter-select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.wn-frontmatter-input::placeholder,
.wn-frontmatter-textarea::placeholder {
  color: var(--wn-zinc-600);
}

/* Date input calendar icon - invert for dark mode visibility */
.wn-frontmatter-input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
  opacity: 0.5;
  cursor: pointer;
}

.wn-frontmatter-input[type="date"]::-webkit-calendar-picker-indicator:hover {
  opacity: 0.8;
}

.wn-frontmatter-textarea {
  resize: vertical;
  min-height: 72px;
  max-height: 200px;
  field-sizing: content; /* Auto-expand based on content (modern browsers) */
}

.wn-frontmatter-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-size: 16px;
  background-position: right var(--wn-space-3) center;
  background-repeat: no-repeat;
  padding-right: var(--wn-space-8);
}

.wn-frontmatter-hint {
  font-size: var(--wn-font-xs);
  color: var(--wn-zinc-600);
}

/* Checkbox Field */
.wn-frontmatter-checkbox-field {
  display: flex;
  align-items: center;
  gap: var(--wn-space-3);
  padding: var(--wn-space-3) 0;
}

.wn-frontmatter-checkbox {
  width: 16px;
  height: 16px;
  accent-color: var(--wn-brand-500);
  cursor: pointer;
}

.wn-frontmatter-checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--wn-space-3);
  font-size: var(--wn-font-sm);
  color: var(--wn-zinc-50);
  cursor: pointer;
}

.wn-frontmatter-checkbox-hint {
  margin-left: auto;
  font-size: var(--wn-font-xs);
  color: var(--wn-zinc-600);
}

/* Tags / Array Field */
.wn-frontmatter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--wn-space-2);
  margin-bottom: var(--wn-space-3);
}

.wn-frontmatter-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--wn-space-1);
  padding: var(--wn-space-1) var(--wn-space-3);
  background: var(--wn-brand-alpha-10);
  border-radius: var(--wn-radius-sm);
  font-size: var(--wn-font-xs);
  color: var(--wn-brand-400);
}

.wn-frontmatter-tag-remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: var(--wn-radius-full);
  border: none;
  background: transparent;
  color: var(--wn-zinc-500);
  cursor: pointer;
  transition: all var(--wn-transition-fast) ease;
}

.wn-frontmatter-tag-remove:hover {
  background: var(--wn-error-alpha-20);
  color: var(--wn-error-400);
}

/* Array structured items */
.wn-frontmatter-array-item {
  display: flex;
  align-items: flex-start;
  gap: var(--wn-space-2);
  padding: var(--wn-space-2) 0;
  border-bottom: 1px solid var(--wn-overlay-10);
}

.wn-frontmatter-array-item > :first-child {
  flex: 1;
  min-width: 0;
}

.wn-frontmatter-add-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--wn-space-1);
  margin-top: var(--wn-space-2);
  padding: var(--wn-space-1) var(--wn-space-3);
  background: var(--wn-brand-alpha-10);
  border: 1px dashed var(--wn-brand-500);
  border-radius: var(--wn-radius-sm);
  font-size: var(--wn-font-xs);
  color: var(--wn-brand-400);
  cursor: pointer;
  transition: all var(--wn-transition-fast) ease;
}

.wn-frontmatter-add-btn:hover:not(:disabled) {
  background: var(--wn-brand-alpha-20);
}

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

/* Image Field */
.wn-frontmatter-image-field {
  display: flex;
  gap: var(--wn-space-3);
}

.wn-frontmatter-image-field .wn-frontmatter-input {
  flex: 1;
}

.wn-frontmatter-image-preview {
  position: relative;
  width: 100%;
  border-radius: var(--wn-radius-md);
  overflow: hidden;
  background: var(--wn-zinc-950);
  border: 1px solid var(--wn-overlay-10);
  margin-bottom: var(--wn-space-3);
}

.wn-frontmatter-image-preview img {
  width: 100%;
  height: auto;
  max-height: 200px;
  object-fit: contain;
  display: block;
}

.wn-frontmatter-upload-btn {
  padding: var(--wn-space-3) var(--wn-space-4);
  background: transparent;
  border: 1px solid var(--wn-overlay-10);
  border-radius: var(--wn-radius-md);
  color: var(--wn-zinc-400);
  font-size: var(--wn-font-xs);
  cursor: pointer;
  transition: all var(--wn-transition-fast) ease;
}

.wn-frontmatter-upload-btn:hover {
  background: var(--wn-overlay-5);
  color: var(--wn-zinc-50);
}

.wn-frontmatter-upload-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Section Divider */
.wn-frontmatter-divider {
  height: 1px;
  background: var(--wn-overlay-10);
  margin: var(--wn-space-1) 0;
}

/* Checkbox Group (Multiselect) */
.wn-frontmatter-checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--wn-space-2);
  padding: var(--wn-space-2) 0;
}

.wn-frontmatter-checkbox-group .wn-frontmatter-checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--wn-space-2);
  font-size: var(--wn-font-sm);
  color: var(--wn-zinc-50);
  cursor: pointer;
}

.wn-frontmatter-checkbox-group .wn-frontmatter-checkbox {
  width: 14px;
  height: 14px;
}

/* Field Group (Object) */
.wn-frontmatter-field-group {
  border: 1px solid var(--wn-overlay-10);
  border-radius: var(--wn-radius-md);
  padding: var(--wn-space-3);
}

.wn-frontmatter-group-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--wn-space-2);
  background: transparent;
  border: none;
  color: var(--wn-zinc-400);
  cursor: pointer;
  font-size: var(--wn-font-xs);
}

.wn-frontmatter-group-toggle:hover {
  color: var(--wn-zinc-50);
}

.wn-frontmatter-group-content {
  display: flex;
  flex-direction: column;
  gap: var(--wn-space-3);
  padding-top: var(--wn-space-3);
  border-top: 1px solid var(--wn-overlay-10);
  margin-top: var(--wn-space-2);
}

/* Rich Text Area */
.wn-frontmatter-textarea--rich {
  min-height: 150px;
  font-family: monospace;
  line-height: 1.6;
}

/* Datetime input calendar icon */
.wn-frontmatter-input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
  opacity: 0.5;
  cursor: pointer;
}

.wn-frontmatter-input[type="datetime-local"]::-webkit-calendar-picker-indicator:hover {
  opacity: 0.8;
}

/* ============================================================================
   LIGHT MODE OVERRIDES
   ============================================================================ */

.wn-light .wn-frontmatter-panel {
  border-left-color: var(--wn-overlay-light-10);
  background-color: #fff;
}

.wn-light .wn-frontmatter-header {
  border-bottom-color: var(--wn-overlay-light-10);
}

.wn-light .wn-frontmatter-title {
  color: var(--wn-zinc-900);
}

.wn-light .wn-frontmatter-badge {
  background-color: var(--wn-overlay-light-5);
  color: var(--wn-zinc-500);
}

.wn-light .wn-frontmatter-close {
  color: var(--wn-zinc-500);
}

.wn-light .wn-frontmatter-close:hover {
  background: var(--wn-overlay-light-5);
  color: var(--wn-zinc-900);
}

.wn-light .wn-frontmatter-empty-icon {
  color: var(--wn-zinc-400);
}

.wn-light .wn-frontmatter-empty-text {
  color: var(--wn-zinc-500);
}

.wn-light .wn-frontmatter-empty-hint {
  color: var(--wn-zinc-400);
}

.wn-light .wn-frontmatter-label {
  color: var(--wn-zinc-600);
}

.wn-light .wn-frontmatter-input,
.wn-light .wn-frontmatter-textarea,
.wn-light .wn-frontmatter-select {
  background: var(--wn-zinc-50);
  border-color: var(--wn-overlay-light-10);
  color: var(--wn-zinc-900);
}

.wn-light .wn-frontmatter-input::placeholder,
.wn-light .wn-frontmatter-textarea::placeholder {
  color: var(--wn-zinc-400);
}

/* Date input calendar icon - no invert for light mode */
.wn-light
.wn-frontmatter-input[type="date"]::-webkit-calendar-picker-indicator {
  filter: none;
  opacity: 0.6;
}

.wn-light
  .wn-frontmatter-input[type="date"]::-webkit-calendar-picker-indicator:hover {
  opacity: 1;
}

.wn-light .wn-frontmatter-select {
  background-color: var(--wn-zinc-50);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2352525b' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-size: 16px;
  background-position: right var(--wn-space-3) center;
  background-repeat: no-repeat;
}

.wn-light .wn-frontmatter-hint {
  color: var(--wn-zinc-400);
}

.wn-light .wn-frontmatter-checkbox-label {
  color: var(--wn-zinc-900);
}

.wn-light .wn-frontmatter-checkbox-hint {
  color: var(--wn-zinc-400);
}

.wn-light .wn-frontmatter-tag {
  background: var(--wn-brand-alpha-10);
  color: var(--wn-brand-600);
}

.wn-light .wn-frontmatter-tag-remove {
  color: var(--wn-zinc-500);
}

.wn-light .wn-frontmatter-image-preview {
  background: var(--wn-zinc-50);
  border-color: var(--wn-overlay-light-10);
}

.wn-light .wn-frontmatter-upload-btn {
  border-color: var(--wn-overlay-light-10);
  color: var(--wn-zinc-600);
}

.wn-light .wn-frontmatter-upload-btn:hover {
  background: var(--wn-overlay-light-5);
  color: var(--wn-zinc-900);
}

.wn-light .wn-frontmatter-divider {
  background: var(--wn-overlay-light-10);
}

.wn-light .wn-frontmatter-checkbox-group .wn-frontmatter-checkbox-label {
  color: var(--wn-zinc-900);
}

.wn-light .wn-frontmatter-field-group {
  border-color: var(--wn-overlay-light-10);
}

.wn-light .wn-frontmatter-group-toggle {
  color: var(--wn-zinc-500);
}

.wn-light .wn-frontmatter-group-toggle:hover {
  color: var(--wn-zinc-900);
}

.wn-light .wn-frontmatter-group-content {
  border-top-color: var(--wn-overlay-light-10);
}

.wn-light
  .wn-frontmatter-input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  filter: none;
  opacity: 0.6;
}

.wn-light
  .wn-frontmatter-input[type="datetime-local"]::-webkit-calendar-picker-indicator:hover {
  opacity: 1;
}