/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
  /* Typography */
  --font-sans: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, 'Liberation Mono', Menlo, Monaco, monospace;
  
  /* Font sizes - fluid typography */
  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.875rem, 0.825rem + 0.25vw, 1rem);
  --text-lg: clamp(1rem, 0.9rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1rem + 1vw, 1.75rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem);

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 100ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 300ms ease-out;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 20px rgb(99 102 241 / 0.15);

  /* Z-index scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-toast: 400;

  /* Layout */
  --container-max: 1400px;
  --header-height: 4rem;
}

/* ==========================================================================
   Light Theme (Default)
   ========================================================================== */

:root,
[data-theme="light"] {
  color-scheme: light;
  
  /* Core colors - slightly greyish */
  --color-bg-primary: #f0f0f2;
  --color-bg-secondary: #f5f5f7;
  --color-bg-tertiary: #e8e8ec;
  --color-bg-elevated: #f5f5f7;
  
  /* Text colors */
  --color-text-primary: #18181b;
  --color-text-secondary: #52525b;
  --color-text-tertiary: #71717a;
  --color-text-muted: #a1a1aa;
  
  /* Accent colors */
  --color-accent-primary: #6366f1;
  --color-accent-primary-hover: #4f46e5;
  --color-accent-secondary: #8b5cf6;
  --color-accent-tertiary: #06b6d4;
  
  /* Link colors */
  --color-link: #4f46e5;
  --color-link-hover: #4338ca;
  --color-link-visited: #7c3aed;
  
  /* Table colors */
  --color-table-bg: #f5f5f7;
  --color-table-header-bg: #ebebef;
  --color-table-row-hover: #e4e4e8;
  --color-table-row-alt: #f0f0f2;
  --color-table-border: #dcdce0;
  
  /* Interactive states */
  --color-focus-ring: rgb(99 102 241 / 0.5);
  --color-selection-bg: rgb(99 102 241 / 0.15);
  
  /* Search */
  --color-search-bg: #f5f5f7;
  --color-search-border: #d4d4d8;
  --color-search-border-focus: #6366f1;
  --color-search-placeholder: #a1a1aa;
  
  /* Status colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Directory/file type colors */
  --color-directory: #6366f1;
  --color-parent-dir: #8b5cf6;
  --color-file: #18181b;
  
  /* Misc */
  --color-border: #dcdce0;
  --color-border-strong: #d4d4d8;
  --color-scrollbar-thumb: #c4c4c8;
  --color-scrollbar-track: #e8e8ec;
}

/* ==========================================================================
   Dark Theme
   ========================================================================== */

[data-theme="dark"] {
  color-scheme: dark;
  
  --color-bg-primary: #09090b;
  --color-bg-secondary: #18181b;
  --color-bg-tertiary: #27272a;
  --color-bg-elevated: #1f1f23;
  
  --color-text-primary: #fafafa;
  --color-text-secondary: #d4d4d8;
  --color-text-tertiary: #a1a1aa;
  --color-text-muted: #71717a;
  
  --color-accent-primary: #818cf8;
  --color-accent-primary-hover: #a5b4fc;
  --color-accent-secondary: #a78bfa;
  --color-accent-tertiary: #22d3ee;
  
  --color-link: #818cf8;
  --color-link-hover: #a5b4fc;
  --color-link-visited: #c4b5fd;
  
  --color-table-bg: #18181b;
  --color-table-header-bg: #0f0f12;
  --color-table-row-hover: #27272a;
  --color-table-row-alt: #1f1f23;
  --color-table-border: #27272a;
  
  --color-focus-ring: rgb(129 140 248 / 0.5);
  --color-selection-bg: rgb(129 140 248 / 0.2);
  
  --color-search-bg: #1f1f23;
  --color-search-border: #3f3f46;
  --color-search-border-focus: #818cf8;
  --color-search-placeholder: #71717a;
  
  --color-directory: #818cf8;
  --color-parent-dir: #a78bfa;
  --color-file: #fafafa;
  
  --color-border: #27272a;
  --color-border-strong: #3f3f46;
  --color-scrollbar-thumb: #3f3f46;
  --color-scrollbar-track: #18181b;
  
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
  --shadow-glow: 0 0 30px rgb(129 140 248 / 0.2);
}

/* ==========================================================================
   Base Styles & Reset
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

::selection {
  background-color: var(--color-selection-bg);
}

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

::-webkit-scrollbar-track {
  background: var(--color-scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--color-scrollbar-thumb);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ==========================================================================
   Skip Link (Accessibility)
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-modal);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-accent-primary);
  color: white;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

/* ==========================================================================
   Page Header
   ========================================================================== */

#page-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

@supports (backdrop-filter: blur(12px)) {
  #page-header {
    background-color: rgb(from var(--color-bg-elevated) r g b / 0.85);
  }
}

#page-header h1 {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
  margin: 0;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ==========================================================================
   Breadcrumb Navigation
   ========================================================================== */

#breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background-color: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
}

#breadcrumb a {
  color: var(--color-link);
  text-decoration: none;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

#breadcrumb a:hover {
  background-color: var(--color-selection-bg);
  color: var(--color-link-hover);
}

#breadcrumb a:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

#breadcrumb .separator {
  color: var(--color-text-muted);
  user-select: none;
}

#breadcrumb .current {
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ==========================================================================
   Search & Controls Container
   ========================================================================== */

.controls-container {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

#search-container {
  position: relative;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

#search {
  display: block;
  width: 100%;
  min-width: 200px;
  max-width: 320px;
  padding: var(--space-2) var(--space-3);
  padding-left: var(--space-10);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  background-color: var(--color-search-bg);
  border: 1px solid var(--color-search-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

#search::placeholder {
  color: var(--color-search-placeholder);
}

#search:focus {
  outline: none;
  border-color: var(--color-search-border-focus);
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

#search::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  cursor: pointer;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2'%3E%3Cpath d='M18 6L6 18M6 6l12 12'/%3E%3C/svg%3E") center/contain no-repeat;
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}

#search::-webkit-search-cancel-button:hover {
  opacity: 1;
}

.search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  pointer-events: none;
}

#search-results-count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-left: var(--space-2);
  white-space: nowrap;
}

/* ==========================================================================
   Deep Search Toggle
   ========================================================================== */

.deep-search-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  margin-left: var(--space-2);
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.deep-search-toggle:hover {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-border-strong);
}

.deep-search-toggle:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.deep-search-toggle svg {
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.deep-search-toggle:hover svg {
  color: var(--color-text-secondary);
}

.deep-search-toggle.active {
  background-color: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
}

.deep-search-toggle.active svg {
  color: white;
}

.deep-search-toggle.active:hover {
  background-color: var(--color-accent-primary-hover);
  border-color: var(--color-accent-primary-hover);
}

.deep-search-loading {
  color: var(--color-accent-primary);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ==========================================================================
   Deep Search Results Panel
   ========================================================================== */

.deep-search-results {
  margin-bottom: var(--space-4);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.deep-search-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
}

.deep-search-header h3 {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.deep-search-header h3 svg {
  color: var(--color-accent-primary);
}

.deep-search-count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.deep-search-list {
  max-height: 300px;
  overflow-y: auto;
}

.deep-search-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast);
}

.deep-search-item:last-child {
  border-bottom: none;
}

.deep-search-item:hover {
  background-color: var(--color-table-row-hover);
}

.deep-search-item:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: -2px;
}

.deep-search-item.is-directory {
  color: var(--color-directory);
}

.deep-search-icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
}

.deep-search-icon svg {
  width: 100%;
  height: 100%;
}

.deep-search-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 120px;
  max-width: 300px;
}

.deep-search-path {
  flex: 1;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  direction: rtl;
  text-align: left;
}

.deep-search-size {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  min-width: 60px;
  text-align: right;
}

/* Mobile adjustments for deep search */
@media (max-width: 600px) {
  .deep-search-item {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  
  .deep-search-name {
    min-width: auto;
    max-width: calc(100% - 30px);
  }
  
  .deep-search-path {
    width: 100%;
    order: 3;
    margin-left: calc(16px + var(--space-2));
  }
  
  .deep-search-size {
    display: none;
  }
}

/* ==========================================================================
   Theme Toggle
   ========================================================================== */

#theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  flex-shrink: 0;
}

#theme-toggle:hover {
  background-color: var(--color-table-row-hover);
  border-color: var(--color-border-strong);
}

#theme-toggle:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

#theme-toggle:active {
  transform: scale(0.95);
}

#theme-toggle svg {
  width: 20px;
  height: 20px;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

#theme-toggle:hover svg {
  color: var(--color-text-primary);
}

.theme-icon-light,
.theme-icon-dark {
  display: none;
}

[data-theme="light"] .theme-icon-light,
[data-theme="dark"] .theme-icon-dark {
  display: block;
}

/* ==========================================================================
   External App Link
   ========================================================================== */

#external-app-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background-color: var(--color-accent-primary);
  border: 1px solid var(--color-accent-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  flex-shrink: 0;
  text-decoration: none;
}

#external-app-link:hover {
  background-color: var(--color-accent-primary-hover);
  border-color: var(--color-accent-primary-hover);
}

#external-app-link:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

#external-app-link:active {
  transform: scale(0.95);
}

#external-app-link svg {
  width: 20px;
  height: 20px;
  color: white;
  transition: color var(--transition-fast);
}

/* ==========================================================================
   Main Content Area
   ========================================================================== */

#main-content {
  padding: var(--space-4) var(--space-6);
  max-width: var(--container-max);
  margin: 0 auto;
}

/* ==========================================================================
   Statistics Bar
   ========================================================================== */

#stats-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-4);
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

.stat-value {
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Table Styles
   ========================================================================== */

.table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-table-border);
  background-color: var(--color-table-bg);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  table-layout: auto;
  font-size: var(--text-sm);
}

/* Table Header */
thead {
  background-color: var(--color-table-header-bg);
  position: sticky;
  top: 0;
  z-index: var(--z-base);
}

thead tr {
  border-bottom: 1px solid var(--color-table-border);
}

thead th {
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  text-align: left;
  white-space: nowrap;
  user-select: none;
}

thead th a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

thead th a:hover {
  color: var(--color-text-primary);
}

thead th a:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.sort-indicator {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0.4;
  transition: opacity var(--transition-fast);
}

thead th a:hover .sort-indicator {
  opacity: 0.7;
}

.sort-indicator.active {
  opacity: 1;
}

.sort-indicator svg {
  width: 10px;
  height: 10px;
}

/* Table Body */
tbody tr {
  border-bottom: 1px solid var(--color-table-border);
  transition: background-color var(--transition-fast);
}

tbody tr:last-child {
  border-bottom: none;
}

tbody tr:hover {
  background-color: var(--color-table-row-hover);
}

tbody tr:nth-child(even) {
  background-color: var(--color-table-row-alt);
}

tbody tr:nth-child(even):hover {
  background-color: var(--color-table-row-hover);
}

/* Focus within row */
tbody tr:focus-within {
  background-color: var(--color-selection-bg);
}

tbody td {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-secondary);
  vertical-align: middle;
}

/* Name Column */
.indexcolname {
  min-width: 200px;
}

/* Size Column */
.indexcolsize {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-align: right;
  white-space: nowrap;
  min-width: 80px;
}

/* Last Modified Column */
.indexcollastmod {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  white-space: nowrap;
  min-width: 120px;
}

/* Description Column */
.indexcoldesc {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ==========================================================================
   File Icons
   ========================================================================== */

.icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-right: var(--space-3);
  vertical-align: middle;
  flex-shrink: 0;
}

.icon-wrapper img,
.icon-wrapper svg {
  width: 18px;
  height: 18px;
  object-fit: contain;
}

.file-link {
  display: inline-flex;
  align-items: center;
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.file-link:hover {
  color: var(--color-link-hover);
}

.file-link:visited {
  color: var(--color-link-visited);
}

.file-link:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Directory styling */
.is-directory .file-link {
  color: var(--color-directory);
  font-weight: 500;
}

.is-directory .file-link:hover {
  color: var(--color-accent-primary-hover);
}

/* Parent directory styling */
.is-parent .file-link {
  color: var(--color-parent-dir);
}

/* Symlink indicator */
.is-symlink .file-link::after {
  content: ' →';
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

/* ==========================================================================
   Hidden Row (Search Filter)
   ========================================================================== */

.hidden {
  display: none !important;
}

/* ==========================================================================
   Empty State
   ========================================================================== */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-6);
  text-align: center;
  color: var(--color-text-tertiary);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.empty-state-description {
  font-size: var(--text-sm);
  max-width: 400px;
}

/* ==========================================================================
   Loading State
   ========================================================================== */

.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background-color: rgb(from var(--color-bg-primary) r g b / 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Keyboard Navigation Indicator
   ========================================================================== */

tbody tr.keyboard-focused {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: -2px;
  background-color: var(--color-selection-bg);
}

/* ==========================================================================
   Footer
   ========================================================================== */

#page-footer {
  padding: var(--space-6);
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-8);
}

#page-footer a {
  color: var(--color-link);
  text-decoration: none;
}

#page-footer a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

/* Tablet */
@media (max-width: 900px) {
  :root {
    --space-6: 1.25rem;
  }
  
  .indexcoldesc {
    display: none;
  }
}

/* Mobile */
@media (max-width: 600px) {
  :root {
    --space-6: 1rem;
  }
  
  #page-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }
  
  #page-header h1 {
    font-size: var(--text-lg);
  }
  
  .controls-container {
    width: 100%;
    justify-content: space-between;
  }
  
  #search-container {
    flex: 1;
  }
  
  #search {
    max-width: none;
  }
  
  #breadcrumb {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
  }
  
  #main-content {
    padding: var(--space-3);
  }
  
  #stats-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
  
  /* Horizontal scroll for table on mobile */
  .table-container {
    border-radius: var(--radius-md);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  #indexlist {
    min-width: 600px;
  }
  
  tbody td {
    padding: var(--space-3);
    white-space: nowrap;
  }
  
  .icon-wrapper {
    width: 20px;
    height: 20px;
    margin-right: var(--space-2);
  }
  
  .icon-wrapper img,
  .icon-wrapper svg {
    width: 16px;
    height: 16px;
  }
}

/* Small Mobile */
@media (max-width: 400px) {
  #page-header h1 {
    font-size: var(--text-base);
  }
  
  #theme-toggle {
    width: 36px;
    height: 36px;
  }
  
  #theme-toggle svg {
    width: 18px;
    height: 18px;
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
  }
  
  body {
    font-size: 12pt;
  }
  
  #page-header {
    position: static;
    border-bottom: 2px solid #000;
  }
  
  #search-container,
  #theme-toggle,
  .skip-link {
    display: none !important;
  }
  
  a {
    text-decoration: underline;
  }
  
  .table-container {
    border: 1px solid #000;
    box-shadow: none;
  }
  
  thead {
    position: static;
  }
  
  tbody tr {
    page-break-inside: avoid;
  }
}

/* ==========================================================================
   High Contrast Mode
   ========================================================================== */

@media (prefers-contrast: high) {
  :root,
  [data-theme="light"] {
    --color-border: #000;
    --color-table-border: #000;
    --color-text-primary: #000;
    --color-link: #0000ee;
    --color-link-visited: #551a8b;
  }
  
  [data-theme="dark"],
  [data-theme="auto"] {
    --color-border: #fff;
    --color-table-border: #fff;
    --color-text-primary: #fff;
    --color-link: #9ecfff;
    --color-link-visited: #e9cfff;
  }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.no-wrap {
  white-space: nowrap;
}

.text-mono {
  font-family: var(--font-mono);
}

.text-muted {
  color: var(--color-text-muted);
}