/* Variables & Theme configuration */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;

  /* Premium Dark Palette */
  --bg-app: #07090e;
  --bg-card: rgba(13, 18, 30, 0.7);
  --bg-card-hover: rgba(18, 25, 41, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-focus: rgba(139, 92, 246, 0.5); /* Violet-500 */
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Accent Gradients & Glows */
  --accent-primary: #8b5cf6; /* Violet */
  --accent-secondary: #6366f1; /* Indigo */
  --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #4f46e5 100%);
  --accent-glow: rgba(139, 92, 246, 0.25);
  --danger-color: #ef4444;
  --success-color: #10b981;
  
  /* Shadows & Radius */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Rules */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Background Glow Effects */
.glow-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.glow-1 {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, rgba(0,0,0,0) 70%);
  filter: blur(80px);
}

.glow-2 {
  position: absolute;
  bottom: -10%;
  left: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, rgba(0,0,0,0) 70%);
  filter: blur(100px);
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* App Container */
.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-block-end: 2rem;
  padding-block-end: 1rem;
  border-block-end: 1px solid var(--border-color);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.logo-icon i {
  width: 24px;
  height: 24px;
  color: white;
}

.logo-text h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-text h1 span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.header-actions {
  display: flex;
  gap: 0.75rem;
}

/* Main Content Grid */
.app-main {
  display: grid;
  grid-template-columns: 450px 1fr;
  gap: 2rem;
  flex-grow: 1;
  align-items: stretch;
}

@media (max-width: 1024px) {
  .app-main {
    grid-template-columns: 1fr;
  }
}

.workspace-column {
  display: flex;
  flex-direction: column;
}

.full-height {
  height: 100%;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

/* Card Styling (Glassmorphism) */
.card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.card.glass {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  min-height: 48px; /* Accessibility requirement */
}

.btn-small {
  padding: 0.5rem 0.875rem;
  font-size: 0.85rem;
  min-height: 38px;
}

.btn-large {
  padding: 1rem 1.5rem;
  font-size: 1.05rem;
  min-height: 54px;
}

.btn-full-width {
  width: 100%;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.btn-accent {
  background-color: var(--text-primary);
  color: var(--bg-app);
}

.btn-accent:hover:not(:disabled) {
  background-color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

.btn-accent:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.btn-danger-link {
  background: transparent;
  border: none;
  color: var(--danger-color);
  cursor: pointer;
}

.btn-danger-link:hover {
  text-decoration: underline;
}

/* Tabs */
.tab-header {
  display: flex;
  background-color: rgba(0, 0, 0, 0.2);
  border-block-end: 1px solid var(--border-color);
}

.tab-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 48px;
}

.tab-btn:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.02);
}

.tab-btn.active {
  color: var(--text-primary);
  border-bottom-color: var(--accent-primary);
  background-color: rgba(255, 255, 255, 0.04);
}

.tab-content {
  padding: 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.tab-panel {
  display: none;
  flex-direction: column;
  gap: 1.5rem;
  flex-grow: 1;
}

.tab-panel.active {
  display: flex;
}

/* Small Tabs in output header */
.small-tabs .tab-btn {
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
}

/* File Upload Zone */
.upload-drop-zone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 2.5rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  background-color: rgba(255, 255, 255, 0.01);
  transition: all var(--transition-normal);
  min-height: 250px;
}

.upload-drop-zone:hover, .upload-drop-zone.dragover {
  border-color: var(--accent-primary);
  background-color: rgba(139, 92, 246, 0.03);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.05);
}

.upload-drop-zone.dragover {
  transform: scale(0.98);
}

.upload-prompt {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.upload-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.5rem;
  transition: transform var(--transition-normal);
  color: var(--text-secondary);
}

.upload-drop-zone:hover .upload-icon {
  transform: translateY(-5px);
  color: var(--text-primary);
}

.upload-icon i {
  width: 28px;
  height: 28px;
}

.upload-prompt h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
}

.file-limits {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.btn-upload {
  margin-top: 0.5rem;
  pointer-events: none; /* Let parent click trigger file input */
}

/* Selected File State */
.selected-file-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.04);
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  animation: fadeIn var(--transition-fast) forwards;
}

.file-details {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-align: left;
}

.file-thumb {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
}

.file-thumb i {
  width: 20px;
  height: 20px;
}

.file-text-details {
  display: flex;
  flex-direction: column;
}

.file-name {
  font-size: 0.9rem;
  font-weight: 500;
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-size {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Form Styles */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  text-align: left;
}

label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Inputs & Form Controls */
input[type="url"],
input[type="password"],
input[type="text"],
select,
textarea {
  font-family: var(--font-sans);
  font-size: 1rem; /* Accessibility: prevent iOS zoom */
  background-color: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  min-height: 48px;
  transition: all var(--transition-fast);
  width: 100%;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Accessibility Focus States for Keyboard */
input:focus-visible, 
select:focus-visible, 
button:focus-visible, 
.upload-drop-zone:focus-visible,
[role="tab"]:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* URL Input Specifics */
.url-input-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.url-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.url-input-wrapper input {
  padding-inline-start: 2.75rem;
}

.input-icon {
  position: absolute;
  left: 1rem;
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}

/* Output Column layout */
.output-pane {
  min-height: 600px;
}

.output-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.2);
  border-block-end: 1px solid var(--border-color);
  padding-inline-end: 1rem;
}

.output-actions {
  display: flex;
  gap: 0.5rem;
}

.output-body {
  flex-grow: 1;
  position: relative;
  overflow: auto;
  display: flex;
  flex-direction: column;
  min-height: 450px;
}

/* Empty State / Sparks */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3rem;
  text-align: center;
  color: var(--text-muted);
  margin: auto;
}

.empty-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.02);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.empty-icon i {
  width: 32px;
  height: 32px;
  animation: float 3s ease-in-out infinite;
}

.empty-state h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.empty-state p {
  font-size: 0.9rem;
  max-width: 300px;
}

/* Loading indicator overlay */
.loader-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  z-index: 10;
  animation: fadeIn var(--transition-fast) forwards;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border-top-color: var(--accent-primary);
  animation: spin 1s linear infinite;
  box-shadow: var(--shadow-glow);
}

#loader-text {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* Output Preview Panel styles */
.preview-panel {
  display: none;
  padding: 2rem;
  overflow: auto;
  flex-grow: 1;
}

.preview-panel.active {
  display: block;
}

/* Raw code block styling */
.raw-panel {
  padding: 0;
}

.raw-panel pre {
  margin: 0;
  padding: 1.5rem;
  border-radius: 0;
  background-color: transparent !important;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  height: 100%;
  overflow: auto;
}

.raw-panel code {
  font-family: var(--font-mono) !important;
}

/* Stats Area */
.output-stats {
  display: flex;
  gap: 1.5rem;
  padding: 0.75rem 1.5rem;
  background-color: rgba(0, 0, 0, 0.3);
  border-block-start: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.stat-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.stat-item i {
  width: 14px;
  height: 14px;
  color: var(--text-muted);
}

/* Markdown preview formatting styles */
.markdown-body {
  color: #e2e8f0;
  font-size: 0.95rem;
  line-height: 1.7;
}

.markdown-body h1, 
.markdown-body h2, 
.markdown-body h3, 
.markdown-body h4 {
  font-family: var(--font-display);
  color: white;
  margin-block-start: 1.5rem;
  margin-block-end: 1rem;
  font-weight: 600;
}

.markdown-body h1 {
  font-size: 1.75rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.markdown-body h2 {
  font-size: 1.4rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4rem;
}

.markdown-body h3 {
  font-size: 1.15rem;
}

.markdown-body p, 
.markdown-body ul, 
.markdown-body ol {
  margin-block-end: 1.25rem;
}

.markdown-body ul, 
.markdown-body ol {
  padding-inline-start: 1.5rem;
}

.markdown-body li {
  margin-block-end: 0.35rem;
}

.markdown-body code {
  font-family: var(--font-mono);
  background-color: rgba(255, 255, 255, 0.08);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
  color: #f43f5e; /* soft rose code text */
}

.markdown-body pre {
  background-color: #0b0f19;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  overflow-x: auto;
  margin-block-end: 1.25rem;
}

.markdown-body pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  font-size: 0.85rem;
  color: inherit;
}

.markdown-body blockquote {
  border-inline-start: 4px solid var(--accent-primary);
  padding-inline-start: 1rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-block-end: 1.25rem;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin-block-end: 1.25rem;
}

.markdown-body th, 
.markdown-body td {
  border: 1px solid var(--border-color);
  padding: 0.6rem 0.8rem;
  text-align: left;
}

.markdown-body th {
  background-color: rgba(255, 255, 255, 0.03);
  font-weight: 600;
}

.markdown-body tr:nth-child(even) td {
  background-color: rgba(255, 255, 255, 0.01);
}

.markdown-body img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin-block-end: 1.25rem;
}

/* Slide-over Drawer UI */
.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.drawer {
  position: absolute;
  top: 0;
  right: 0;
  width: 450px;
  max-width: 100%;
  height: 100%;
  background-color: #0c0f17;
  border-inline-start: 1px solid var(--border-color);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.drawer-overlay.active .drawer {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem;
  border-block-end: 1px solid var(--border-color);
}

.drawer-header h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.drawer-header h2 i {
  width: 20px;
  height: 20px;
  color: var(--accent-primary);
}

.drawer-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex-grow: 1;
}

/* Settings Form elements */
.settings-fieldset {
  border: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.settings-fieldset legend {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  margin-block-end: 0.5rem;
  color: white;
}

.fieldset-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.password-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.password-input-wrapper input {
  padding-inline-end: 2.75rem;
}

.btn-icon-inside {
  position: absolute;
  right: 0.75rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon-inside:hover {
  color: var(--text-primary);
}

.margin-top-sm {
  margin-top: 0.75rem;
}

/* History List styles */
.history-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1rem;
}

.history-items-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-item {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.history-item:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
}

.history-item-details {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-align: left;
}

.history-item-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.history-item:hover .history-item-icon {
  color: var(--accent-primary);
}

.history-item-icon i {
  width: 18px;
  height: 18px;
}

.history-item-meta {
  display: flex;
  flex-direction: column;
}

.history-item-title {
  font-size: 0.875rem;
  font-weight: 500;
  max-width: 250px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-item-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.history-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--accent-gradient);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.3);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 1000;
  transition: transform var(--transition-normal);
}

.toast.active {
  transform: translateX(-50%) translateY(0);
}

.toast i {
  width: 18px;
  height: 18px;
}

/* Utility Helpers */
.visually-hidden {
  position: absolute;
  clip-path: inset(50%);
  overflow: hidden;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  white-space: nowrap;
}

.visually-hidden {
  display: none !important; /* overrule in specific code states if needed */
}

/* Custom class for hiding visually instead of display:none to be accessible */
.visually-hidden {
  position: absolute;
  clip-path: inset(50%);
  overflow: hidden;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  white-space: nowrap;
}

/* Override utility */
.visually-hidden {
  position: absolute !important;
  clip-path: inset(50%) !important;
  overflow: hidden !important;
  width: 1px !important;
  height: 1px !important;
  margin: -1px !important;
  padding: 0 !important;
  border: 0 !important;
  white-space: nowrap !important;
}

.visually-hidden.visually-hidden {
  /* double class specificity just in case */
}

/* Remove visual hiding */
.tab-panel:not(.active),
.drawer-overlay:not(.active),
.output-stats.visually-hidden,
.selected-file-info.visually-hidden,
.loader-container.visually-hidden,
.toast.visually-hidden {
  display: none !important;
}

/* Footer rules */
.app-footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--border-color);
}

.app-footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.app-footer a:hover {
  color: var(--accent-primary);
}

/* Keyframe animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}