/**
 * ConcreteInfo Theme for MarkdownConverter
 * Based on logo palette: #464646, #9a9696, #e5461f, #e3e3e3, #0d0b09
 * Version: 3.0.0
 */

/* ============================================
   CSS Variables - ConcreteInfo Theme
   ============================================ */
:root {
  /* Primary Colors from Logo Palette */
  --ci-dark-gray: #464646;
  --ci-medium-gray: #9a9696;
  --ci-accent: #e5461f;
  --ci-light-gray: #e3e3e3;
  --ci-black: #0d0b09;

  /* Extended Palette */
  --ci-accent-hover: #c93a18;
  --ci-accent-light: rgba(229, 70, 31, 0.1);
  --ci-white: #ffffff;
  --ci-bg: #f5f5f5;
  --ci-border: #d0d0d0;

  /* Semantic Colors */
  --ci-success: #28a745;
  --ci-warning: #ffc107;
  --ci-danger: #dc3545;
  --ci-info: #17a2b8;

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

/* ============================================
   ConcreteInfo Theme Application
   ============================================ */
body.theme-concreteinfo {
  background: var(--ci-bg);
  color: var(--ci-dark-gray);
}

body.theme-concreteinfo .toolbar {
  background: linear-gradient(135deg, var(--ci-dark-gray) 0%, var(--ci-black) 100%);
  border-bottom: 3px solid var(--ci-accent);
}

body.theme-concreteinfo .toolbar button {
  color: var(--ci-white);
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

body.theme-concreteinfo .toolbar button:hover {
  background: var(--ci-accent);
  border-color: var(--ci-accent);
  transform: translateY(-1px);
}

body.theme-concreteinfo .tab-bar {
  background: var(--ci-dark-gray);
  border-bottom: 2px solid var(--ci-accent);
}

body.theme-concreteinfo .tab {
  background: var(--ci-medium-gray);
  color: var(--ci-white);
  border: none;
  margin: 2px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: all var(--transition-fast);
}

body.theme-concreteinfo .tab:hover {
  background: var(--ci-accent-light);
}

body.theme-concreteinfo .tab.active {
  background: var(--ci-accent);
  color: var(--ci-white);
}

body.theme-concreteinfo .editor-textarea {
  background: var(--ci-white);
  color: var(--ci-black);
  border: 1px solid var(--ci-border);
  font-family: var(--font-mono);
}

body.theme-concreteinfo .preview-content {
  background: var(--ci-white);
  color: var(--ci-dark-gray);
  border-left: 3px solid var(--ci-accent);
}

body.theme-concreteinfo .status-bar {
  background: var(--ci-dark-gray);
  color: var(--ci-light-gray);
  border-top: 2px solid var(--ci-accent);
}

/* ============================================
   Modern Modal Styles
   ============================================ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(13, 11, 9, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--ci-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 90%;
  max-height: 85vh;
  overflow: hidden;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-content {
  transform: scale(1) translateY(0);
}

.modal-header {
  background: linear-gradient(135deg, var(--ci-dark-gray) 0%, var(--ci-black) 100%);
  color: var(--ci-white);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 3px solid var(--ci-accent);
}

.modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  font-family: var(--font-sans);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--ci-white);
  font-size: 1.5rem;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--ci-accent);
  transform: rotate(90deg);
}

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  max-height: 60vh;
}

.modal-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--ci-light-gray);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  border-top: 1px solid var(--ci-border);
}

/* ============================================
   Button Styles
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--ci-accent);
  color: var(--ci-white);
}

.btn-primary:hover {
  background: var(--ci-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--ci-medium-gray);
  color: var(--ci-white);
}

.btn-secondary:hover {
  background: var(--ci-dark-gray);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--ci-accent);
  color: var(--ci-accent);
}

.btn-outline:hover {
  background: var(--ci-accent);
  color: var(--ci-white);
}

.btn-ghost {
  background: transparent;
  color: var(--ci-dark-gray);
}

.btn-ghost:hover {
  background: var(--ci-light-gray);
}

/* ============================================
   Form Controls
   ============================================ */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--ci-dark-gray);
  font-size: 0.875rem;
}

.form-input,
.form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  border: 2px solid var(--ci-border);
  border-radius: var(--radius-md);
  background: var(--ci-white);
  color: var(--ci-dark-gray);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--ci-accent);
  box-shadow: 0 0 0 3px var(--ci-accent-light);
}

.form-input::placeholder {
  color: var(--ci-medium-gray);
}

/* ============================================
   App Header with Logo
   ============================================ */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 16px;
  background: #ffffff;
  border-bottom: 2px solid #e1e4e8;
  min-height: 36px;
}

.app-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-logo {
  height: 22px;
  width: auto;
}

.app-title {
  color: #24292e;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

.app-version {
  color: #6a737d;
  font-size: 0.7rem;
  font-family: 'SFMono-Regular', Consolas, monospace;
}

/* Dark theme header adjustments */
body.theme-dark .app-header,
body.theme-dracula .app-header,
body.theme-onedark .app-header,
body.theme-tokyonight .app-header,
body.theme-monokai .app-header,
body.theme-cobalt2 .app-header,
body.theme-gruvbox-dark .app-header,
body.theme-ayu-dark .app-header,
body.theme-ayu-mirage .app-header,
body.theme-palenight .app-header,
body.theme-oceanic-next .app-header,
body.theme-nord .app-header,
body.theme-concrete-dark .app-header {
  background: #1f2937;
  border-bottom-color: #374151;
}

body.theme-dark .app-title,
body.theme-dracula .app-title,
body.theme-onedark .app-title,
body.theme-tokyonight .app-title,
body.theme-monokai .app-title,
body.theme-cobalt2 .app-title,
body.theme-gruvbox-dark .app-title,
body.theme-ayu-dark .app-title,
body.theme-ayu-mirage .app-title,
body.theme-palenight .app-title,
body.theme-oceanic-next .app-title,
body.theme-nord .app-title,
body.theme-concrete-dark .app-title {
  color: #f3f4f6;
}

body.theme-dark .app-version,
body.theme-dracula .app-version,
body.theme-onedark .app-version,
body.theme-tokyonight .app-version,
body.theme-monokai .app-version,
body.theme-cobalt2 .app-version,
body.theme-gruvbox-dark .app-version,
body.theme-ayu-dark .app-version,
body.theme-ayu-mirage .app-version,
body.theme-palenight .app-version,
body.theme-oceanic-next .app-version,
body.theme-nord .app-version,
body.theme-concrete-dark .app-version {
  color: #9ca3af;
}

body.theme-dark .app-logo,
body.theme-dracula .app-logo,
body.theme-onedark .app-logo,
body.theme-tokyonight .app-logo,
body.theme-monokai .app-logo,
body.theme-cobalt2 .app-logo,
body.theme-gruvbox-dark .app-logo,
body.theme-ayu-dark .app-logo,
body.theme-ayu-mirage .app-logo,
body.theme-palenight .app-logo,
body.theme-oceanic-next .app-logo,
body.theme-nord .app-logo,
body.theme-concrete-dark .app-logo {
  filter: none;
}

/* ============================================
   Converter Cards
   ============================================ */
.converter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

.converter-card {
  background: var(--ci-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  border: 2px solid var(--ci-border);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.converter-card:hover {
  border-color: var(--ci-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.converter-card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.converter-card-title {
  font-weight: 600;
  color: var(--ci-dark-gray);
  margin-bottom: var(--spacing-xs);
}

.converter-card-desc {
  font-size: 0.875rem;
  color: var(--ci-medium-gray);
}

/* ============================================
   Progress Bar
   ============================================ */
.progress-bar {
  height: 8px;
  background: var(--ci-light-gray);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--ci-accent) 0%, var(--ci-accent-hover) 100%);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

/* ============================================
   File Drop Zone
   ============================================ */
.drop-zone {
  border: 2px dashed var(--ci-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--ci-accent);
  background: var(--ci-accent-light);
}

.drop-zone-icon {
  font-size: 3rem;
  color: var(--ci-medium-gray);
  margin-bottom: var(--spacing-md);
}

.drop-zone-text {
  color: var(--ci-dark-gray);
  font-weight: 500;
}

.drop-zone-hint {
  color: var(--ci-medium-gray);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

/* ============================================
   Syntax Highlighting for Editor
   ============================================ */
.editor-syntax .md-heading {
  color: var(--ci-accent);
  font-weight: bold;
}

.editor-syntax .md-bold {
  color: var(--ci-dark-gray);
  font-weight: bold;
}

.editor-syntax .md-italic {
  color: var(--ci-dark-gray);
  font-style: italic;
}

.editor-syntax .md-code {
  background: var(--ci-light-gray);
  color: var(--ci-accent);
  font-family: var(--font-mono);
  padding: 2px 4px;
  border-radius: var(--radius-sm);
}

.editor-syntax .md-link {
  color: var(--ci-info);
  text-decoration: underline;
}

.editor-syntax .md-list {
  color: var(--ci-accent);
}

.editor-syntax .md-blockquote {
  color: var(--ci-medium-gray);
  border-left: 3px solid var(--ci-accent);
  padding-left: var(--spacing-md);
}

/* ============================================
   ASCII Art Generator Styles
   ============================================ */
.ascii-preview {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.2;
  background: var(--ci-black);
  color: #00ff00;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  white-space: pre;
}

.ascii-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

/* ============================================
   Table Generator Styles
   ============================================ */
.table-generator-grid {
  display: grid;
  gap: 1px;
  background: var(--ci-border);
  border: 1px solid var(--ci-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.table-generator-cell {
  background: var(--ci-white);
  padding: var(--spacing-sm);
  min-width: 80px;
  min-height: 32px;
}

.table-generator-cell input {
  width: 100%;
  border: none;
  background: transparent;
  text-align: center;
  font-family: var(--font-mono);
}

.table-generator-cell.header {
  background: var(--ci-light-gray);
  font-weight: 600;
}

/* ============================================
   PDF Viewer/Editor Styles
   ============================================ */
.pdf-viewer {
  background: var(--ci-dark-gray);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pdf-page {
  background: var(--ci-white);
  box-shadow: var(--shadow-lg);
  max-width: 100%;
}

.pdf-toolbar {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--ci-light-gray);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

/* ============================================
   Dark Mode for ConcreteInfo Theme
   ============================================ */
body.theme-concreteinfo-dark {
  --ci-bg: #1a1a1a;
  --ci-white: #2a2a2a;
  --ci-light-gray: #3a3a3a;
  --ci-border: #4a4a4a;
}

body.theme-concreteinfo-dark .editor-textarea,
body.theme-concreteinfo-dark .preview-content {
  background: #2a2a2a;
  color: #e0e0e0;
}

body.theme-concreteinfo-dark .modal-content {
  background: #2a2a2a;
  color: #e0e0e0;
}

body.theme-concreteinfo-dark .modal-body {
  background: #2a2a2a;
}

body.theme-concreteinfo-dark .modal-footer {
  background: #1a1a1a;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-fade-in {
  animation: fadeIn var(--transition-normal);
}

.animate-slide-up {
  animation: slideUp var(--transition-normal);
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  .modal-content {
    width: 95%;
    max-height: 90vh;
  }

  .converter-grid {
    grid-template-columns: 1fr;
  }

  .app-header {
    flex-wrap: wrap;
  }
}

/* ============================================
   Concrete Dark Theme
   ============================================ */
body.theme-concrete-dark {
  background: #1a1a1a;
  color: #e3e3e3;
}

body.theme-concrete-dark .toolbar {
  background: linear-gradient(135deg, #0d0b09 0%, #1a1a1a 100%);
  border-bottom: 3px solid #e5461f;
}

body.theme-concrete-dark .toolbar button {
  color: #e3e3e3;
}

body.theme-concrete-dark .toolbar button:hover {
  background: #e5461f;
}

body.theme-concrete-dark .tab-bar {
  background: #0d0b09;
  border-bottom: 2px solid #e5461f;
}

body.theme-concrete-dark .tab {
  background: #2a2a2a;
  color: #e3e3e3;
  border-radius: 4px 4px 0 0;
}

body.theme-concrete-dark .tab.active {
  background: #464646;
  border-bottom: 2px solid #e5461f;
}

body.theme-concrete-dark .editor-textarea,
body.theme-concrete-dark .editor-pane {
  background: #1a1a1a;
  color: #e3e3e3;
}

body.theme-concrete-dark .preview-content {
  background: #1a1a1a;
  color: #e3e3e3;
}

body.theme-concrete-dark .status-bar {
  background: #0d0b09;
  color: #9a9696;
  border-top: 1px solid #464646;
}

body.theme-concrete-dark .export-dialog-content,
body.theme-concrete-dark .batch-dialog-content {
  background: #2a2a2a;
  color: #e3e3e3;
}

body.theme-concrete-dark .export-dialog-header,
body.theme-concrete-dark .batch-dialog-header {
  background: #1a1a1a;
  border-bottom: 2px solid #e5461f;
}

body.theme-concrete-dark .export-dialog-footer,
body.theme-concrete-dark .batch-dialog-footer {
  background: #1a1a1a;
}

body.theme-concrete-dark input,
body.theme-concrete-dark select,
body.theme-concrete-dark textarea {
  background: #1a1a1a;
  color: #e3e3e3;
  border-color: #464646;
}

body.theme-concrete-dark input:focus,
body.theme-concrete-dark select:focus,
body.theme-concrete-dark textarea:focus {
  border-color: #e5461f;
}

body.theme-concrete-dark .line-numbers {
  background: #0d0b09;
  color: #9a9696;
}

/* ============================================
   Concrete Light Theme
   ============================================ */
body.theme-concrete-light {
  background: #f5f5f5;
  color: #464646;
}

body.theme-concrete-light .toolbar {
  background: #ffffff;
  border-bottom: 3px solid #e5461f;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

body.theme-concrete-light .toolbar button {
  color: #464646;
}

body.theme-concrete-light .toolbar button:hover {
  background: #e5461f;
  color: #ffffff;
}

body.theme-concrete-light .tab-bar {
  background: #ffffff;
  border-bottom: 2px solid #e3e3e3;
}

body.theme-concrete-light .tab {
  background: #f5f5f5;
  color: #464646;
  border-radius: 4px 4px 0 0;
}

body.theme-concrete-light .tab.active {
  background: #ffffff;
  border-bottom: 2px solid #e5461f;
  color: #e5461f;
}

body.theme-concrete-light .editor-textarea,
body.theme-concrete-light .editor-pane {
  background: #ffffff;
  color: #464646;
}

body.theme-concrete-light .preview-content {
  background: #ffffff;
  color: #464646;
}

body.theme-concrete-light .status-bar {
  background: #ffffff;
  color: #9a9696;
  border-top: 1px solid #e3e3e3;
}

body.theme-concrete-light .export-dialog-content,
body.theme-concrete-light .batch-dialog-content {
  background: #ffffff;
  color: #464646;
}

body.theme-concrete-light .export-dialog-header,
body.theme-concrete-light .batch-dialog-header {
  background: #f5f5f5;
  border-bottom: 2px solid #e5461f;
}

body.theme-concrete-light .line-numbers {
  background: #f5f5f5;
  color: #9a9696;
}

/* ============================================
   Concrete Warm Theme
   ============================================ */
body.theme-concrete-warm {
  background: #faf8f5;
  color: #464646;
}

body.theme-concrete-warm .toolbar {
  background: linear-gradient(135deg, #464646 0%, #5a5a5a 100%);
  border-bottom: 3px solid #e5461f;
}

body.theme-concrete-warm .toolbar button {
  color: #faf8f5;
}

body.theme-concrete-warm .toolbar button:hover {
  background: #e5461f;
}

body.theme-concrete-warm .tab-bar {
  background: #464646;
  border-bottom: 2px solid #e5461f;
}

body.theme-concrete-warm .tab {
  background: #6a6a6a;
  color: #faf8f5;
  border-radius: 4px 4px 0 0;
}

body.theme-concrete-warm .tab.active {
  background: #faf8f5;
  color: #e5461f;
  border-bottom: 2px solid #e5461f;
}

body.theme-concrete-warm .editor-textarea,
body.theme-concrete-warm .editor-pane {
  background: #faf8f5;
  color: #464646;
}

body.theme-concrete-warm .preview-content {
  background: #faf8f5;
  color: #464646;
}

body.theme-concrete-warm .status-bar {
  background: #f0ebe4;
  color: #9a9696;
  border-top: 1px solid #e3e3e3;
}

body.theme-concrete-warm .export-dialog-content,
body.theme-concrete-warm .batch-dialog-content {
  background: #faf8f5;
  color: #464646;
}

body.theme-concrete-warm .export-dialog-header,
body.theme-concrete-warm .batch-dialog-header {
  background: #f0ebe4;
  border-bottom: 2px solid #e5461f;
}

body.theme-concrete-warm h1,
body.theme-concrete-warm h2,
body.theme-concrete-warm h3,
body.theme-concrete-warm h4,
body.theme-concrete-warm h5,
body.theme-concrete-warm h6 {
  color: #e5461f;
}

body.theme-concrete-warm a {
  color: #e5461f;
}

body.theme-concrete-warm .line-numbers {
  background: #f0ebe4;
  color: #9a9696;
}