/*
 * editor.css
 * -----------
 * Editor panel, textarea, preview panel, preview toolbar,
 * preview container, empty state.
 *
 * Design Tokens from reflct.co DESIGN.md
 */

/* ── Markdown Input Container ── */
.editor-composer {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  margin: var(--space-6);
  padding: var(--space-6);
  gap: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  transition: all var(--motion-fast);
}

.editor-composer:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light), var(--shadow-2);
}

.markdown-input-container {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  padding: 0;
  background: transparent;
}

.editor-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0;
  background: transparent;
  border-bottom: none;
}

.document-title-input {
  width: 100%;
  padding: var(--space-5) var(--space-5) var(--space-6);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-lg);
  font-weight: 400;
  background: var(--color-surface);
  color: var(--color-text-primary);
  transition: all var(--motion-fast);
}

.document-title-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 0;
}

.editor-tool-btn {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-family:  var(--font-sans);
  cursor: pointer;
  transition: all var(--motion-instant);
}
.editor-tool-btn .lucide{
  width: 16px;
  height: 16px;
}
.editor-tool-btn:hover {
  color: var(--color-text-primary);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.editor-tool-btn:active {
  transform: translateY(0);
}

.markdown-input {
  width: 100%;
  height: 100%;
  padding: 0;
  border: none;
  border-radius: 0;
  font-family: var(--font-mono);
  font-size: var(--font-size-md);
  line-height: 1.7;
  resize: none;
  background: transparent;
  color: var(--color-text-primary);
  transition: background var(--motion-instant);
}

.markdown-input:focus {
  outline: none;
  box-shadow: none;
}

.markdown-input.drag-over {
  background: var(--color-accent-light);
}

.markdown-input::placeholder {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

/* ── Preview Toolbar ── */
.preview-composer {
    display: flex;
    flex: 1;
    min-height: 0;
    flex-direction: column;
    margin: var(--space-6);
    padding: var(--space-6);
    gap: var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-1);
    transition: all var(--motion-fast);
}
.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding:0;
  background: var(--color-surface);
  flex-shrink: 0;
}

.preview-toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

/* ── Device Toggle ── */
.device-toggle {
  display: flex;
  gap: 4px;
  background: var(--color-surface-raised);
  border-radius: var(--radius-xs);
  padding: var(--space-1);
  border: 1px solid var(--color-border-default);
}

.device-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--motion-instant);
}

.device-toggle-btn svg { width: 16px; height: 16px; }

.toc-toggle-btn {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-default);
}

.device-toggle-btn:hover {
  color: var(--color-text-primary);
  transform: translateY(-1px);
}

.device-toggle-btn.active {
  background: var(--color-surface);
  color: var(--color-accent);
  box-shadow: var(--shadow-1);
}

.device-toggle-btn:active {
  transform: translateY(0);
}

/* ── Device Model Picker ── */
.device-model-picker {
  position: relative;
}

.device-model-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--motion-instant);
  white-space: nowrap;
}

.device-model-trigger:hover {
  color: var(--color-text-primary);
  border-color: var(--color-accent);
}

.device-model-trigger .lucide {
  width: 14px;
  height: 14px;
}

.device-model-name {
  font-weight: 500;
}

.device-model-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 100;
  min-width: 240px;
  max-height: 320px;
  overflow-y: auto;
  padding: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-3);
  animation: dropdown-fade-in 120ms ease-out;
}

@keyframes dropdown-fade-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.device-model-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-3) var(--space-5);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--motion-instant);
}

.device-model-option:hover {
  background: var(--color-accent-light);
  color: var(--color-text-primary);
}

.device-model-option.active {
  color: var(--color-accent);
  font-weight: 500;
}

.device-model-option-name {
  text-align: left;
}

.device-model-option-size {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  font-family: var(--font-mono);
  margin-left: var(--space-4);
}

.device-model-group-label {
  padding: var(--space-2) var(--space-5) var(--space-1);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  user-select: none;
}

.device-model-group-label + .device-model-option {
  padding-left: var(--space-5);
}

.device-model-group-label:not(:first-child) {
  margin-top: var(--space-1);
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--space-3);
}

/* ── Dark/Light Mode Toggle ── */
.preview-mode-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--motion-instant);
}

.preview-mode-toggle svg {
  width: 16px;
  height: 16px;
}

.preview-mode-toggle:hover {
  color: var(--color-text-primary);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.preview-mode-toggle.active {
  background: #1A1714;
  color: #fbbf24;
  border-color: #4A4541;
}

.preview-mode-toggle:active {
  transform: translateY(0);
}

.chevron-sm {
  width: 12px !important;
  height: 12px !important;
}

/* ── Export Dropdown Menu ── */
.export-dropdown {
  position: relative;
}

.export-dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  z-index: 100;
  min-width: 180px;
  padding: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-3);
  animation: dropdown-fade-in 120ms ease-out;
}

.export-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3) var(--space-5);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--motion-instant);
  white-space: nowrap;
}

.export-dropdown-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.export-dropdown-item:hover {
  background: var(--color-accent-light);
  color: var(--color-text-primary);
}

/* ── Dark Preview Mode ── */
/* Use CSS filter to invert colors at container level.
   This overrides inline styles applied by the render pipeline,
   which individual class selectors cannot beat in specificity. */
.preview-container.dark-preview {
  background: #181a1b !important;
  filter: invert(1) hue-rotate(180deg);
}

/* Re-invert images and media so they display naturally */
.preview-container.dark-preview img,
.preview-container.dark-preview video,
.preview-container.dark-preview canvas,
.preview-container.dark-preview .katex-display,
.preview-container.dark-preview .katex {
  filter: invert(1) hue-rotate(180deg);
}

/* Code blocks get a softer re-inversion to keep syntax highlighting readable */
.preview-container.dark-preview [data-code-block="true"],
.preview-container.dark-preview .md-code-block-pre,
.preview-container.dark-preview code:not(.md-code-block-code) {
  filter: invert(1) hue-rotate(180deg);
}

/* Slightly dim re-inverted images to reduce glare in dark mode */
.preview-container.dark-preview img {
  opacity: 0.92;
}

/* ── Copy Button ── */
.copy-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: var(--space-3) var(--space-7);
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-xs);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--motion-instant);
}

.copy-btn:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}

.copy-btn:disabled {
  background: var(--color-border-default);
  cursor: not-allowed;
  transform: none;
}

.copy-btn.success {
  background: var(--color-accent);
}

.copy-buttons {
  display: flex;
  gap: var(--space-3);
}

.twitter-btn {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  background: var(--color-surface-base);
  color: var(--color-text-inverse);
  border-radius: var(--radius-xs);
}

.twitter-btn:hover {
  background: #4A4541;
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}

.twitter-btn:disabled {
  background: var(--color-border-default);
  color: var(--color-text-tertiary);
}

.export-btn {
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
}

.export-btn:hover {
  background: var(--color-surface);
  border-color: var(--color-accent);
}

/* ── Preview Content ── */
.preview-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
  border-radius: var(--radius-md);
  background: var(--color-surface-raised);
  position: relative;
  min-height: 0;
}

.preview-content.toc-open {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.preview-container {
  max-width: var(--preview-width-desktop);
  margin: 0 auto;
  padding: var(--space-6) var(--space-6) var(--space-lg);
  background: var(--color-surface);
  min-height: 100%;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
}

.preview-content.toc-open .preview-container {
  flex: 1 1 auto;
  min-width: 0;
}

.preview-container.mobile-mode {
  max-width: var(--preview-width-mobile);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
}

.preview-container .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 12px 4px 12px;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.preview-container .katex-display > .katex {
  display: inline-block;
  min-width: max-content;
}

.preview-toc {
  position: sticky;
  top: 0;
  flex: 0 0 188px;
  max-height: calc(100vh - var(--header-height) - var(--status-bar-height) - 160px);
  overflow-y: auto;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
}

.preview-toc-title {
  margin-bottom: var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-primary);
}

.preview-toc-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.preview-toc-item {
  width: 100%;
  padding: 6px var(--space-2);
  background: transparent;
  border: none;
  border-radius: var(--radius-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--font-size-sm);
  line-height: 1.4;
  text-align: left;
  transition: all var(--motion-instant);
}

.preview-toc-item:hover {
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
}

.preview-toc-item.level-2 {
  padding-left: var(--space-5);
}

.preview-toc-item.level-3 {
  padding-left: var(--space-8);
  color: var(--color-text-tertiary);
}

.preview-toc-empty {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

/* ── Empty State ── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: var(--space-xl);
  color: var(--color-tertiary);
}

.empty-state-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-md);
  opacity: 0.25;
}

.empty-state h3 {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-secondary);
  margin-bottom: var(--space-xs);
}

.empty-state p {
  font-size: 14px;
  color: var(--color-tertiary);
}

/* ── Preview Picker (Template / Typography Dropdowns) ── */
.preview-picker-trigger {
  position: relative;
}

.preview-picker-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--motion-instant);
  white-space: nowrap;
}

.preview-picker-btn svg { width: 14px; height: 14px; }

.preview-picker-btn:hover {
  color: var(--color-text-primary);
  border-color: var(--color-border-strong);
}

.preview-picker-btn.active {
  color: var(--color-text-primary);
  border-color: var(--color-border-strong);
  background: var(--color-accent-light);
}

.preview-picker-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 200;
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-4);
  overflow: visible;
  animation: dropdown-fade-in 120ms ease-out;
}

.template-dropdown {
  width: 520px;
  max-width: 90vw;
}

.typo-dropdown {
  width: 680px;
  max-width: min(94vw, 680px);
}

.template-dropdown-scroll {
  
  max-height: 420px;
  overflow-y: auto;
  padding: var(--space-5) var(--space-5) var(--space-6);
}

.template-dropdown-scroll::-webkit-scrollbar { width: 4px; }
.template-dropdown-scroll::-webkit-scrollbar-thumb { background: var(--color-border-default); border-radius: 2px; }

.typo-dropdown-scroll {
  max-height: 560px;
  overflow-y: auto;
  padding: var(--space-5) var(--space-5) var(--space-6);
}

.typo-dropdown-scroll::-webkit-scrollbar { width: 4px; }
.typo-dropdown-scroll::-webkit-scrollbar-thumb { background: var(--color-border-default); border-radius: 2px; }

/* Inline theme grid for the dropdown */
.theme-grid-inline {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  padding: 4px 2px;
}

.theme-grid-inline .theme-card {
  padding: var(--space-3) var(--space-2);
  border-radius: var(--radius-sm);
  margin: 2px;
}

/* ── Header Cover Export Button ── */
.cover-header-export-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--motion-instant);
  box-shadow: var(--shadow-jade);
}

.cover-header-export-btn svg { width: 14px; height: 14px; }

.cover-header-export-btn:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .editor-header { padding: var(--space-sm) var(--space-sm) 0; }
  .editor-toolbar { gap: 6px; padding-bottom: var(--space-sm); }
  .editor-tool-btn { font-size: 11px; padding: 5px 8px; }
  .markdown-input-container { padding: var(--space-sm); }
  .markdown-input { font-size: 13px; padding: var(--space-sm); }
  .preview-container { padding: 16px; }
  .preview-toolbar { align-items: flex-start; }
  .preview-content.toc-open {
    flex-direction: column;
  }
  .preview-content.toc-open .preview-container {
    width: 100%;
  }
  .preview-toc {
    position: static;
    order: -1;
    flex: none;
    width: 100%;
    max-height: 180px;
  }
}