/* TextCleaner - Fluent Design System CSS */

/* CSS Custom Properties (Variables) */
:root {
  /* Colors - Light Theme */
  --primary-color: #0078d4;
  --primary-hover: #106ebe;
  --primary-active: #005a9e;
  --secondary-color: #6c757d;
  --success-color: #107c10;
  --warning-color: #ff8c00;
  --danger-color: #d13438;
  
  /* Neutral Colors */
  --neutral-10: #fafafa;
  --neutral-20: #f5f5f5;
  --neutral-30: #edebe9;
  --neutral-40: #e1dfdd;
  --neutral-50: #d2d0ce;
  --neutral-60: #c8c6c4;
  --neutral-70: #a19f9d;
  --neutral-80: #605e5c;
  --neutral-90: #484644;
  --neutral-100: #323130;
  --neutral-110: #201f1e;
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: var(--neutral-10);
  --bg-tertiary: var(--neutral-20);
  --bg-acrylic: rgba(255, 255, 255, 0.8);
  --bg-card: var(--bg-primary);
  
  /* Text Colors */
  --text-primary: var(--neutral-110);
  --text-secondary: var(--neutral-80);
  --text-tertiary: var(--neutral-70);
  --text-disabled: var(--neutral-60);
  
  /* Border Colors */
  --border-primary: var(--neutral-40);
  --border-secondary: var(--neutral-30);
  --border-focus: var(--primary-color);
  
  /* Shadows */
  --shadow-2: 0 1px 2px rgba(0, 0, 0, 0.08);
  --shadow-4: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-8: 0 4px 8px rgba(0, 0, 0, 0.12);
  --shadow-16: 0 8px 16px rgba(0, 0, 0, 0.14);
  --shadow-32: 0 16px 32px rgba(0, 0, 0, 0.16);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 0.75rem;
  --space-lg: 1rem;
  --space-xl: 1.5rem;
  --space-2xl: 2rem;
  --space-3xl: 3rem;
  
  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 8px;
  --border-radius-xl: 12px;
  --border-radius-2xl: 16px;
  
  /* Animation */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --bg-primary: #1e1e1e;
  --bg-secondary: #252526;
  --bg-tertiary: #2d2d30;
  --bg-acrylic: rgba(30, 30, 30, 0.8);
  --bg-card: #252526;
  
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-tertiary: #969696;
  --text-disabled: #6e6e6e;
  
  --border-primary: #3c3c3c;
  --border-secondary: #2d2d30;
  
  --neutral-10: #2d2d30;
  --neutral-20: #252526;
  --neutral-30: #3c3c3c;
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg-acrylic);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 1;
  visibility: visible;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-spinner {
  font-size: 2rem;
  color: var(--primary-color);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Header */
.header {
  background: var(--bg-acrylic);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-secondary);
  padding: var(--space-lg) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-xl);
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo i {
  font-size: var(--font-size-2xl);
  color: var(--primary-color);
}

.logo h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

/* Language Selector */
.language-selector {
  position: relative;
}

.language-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
}

.language-btn:hover {
  background: var(--bg-tertiary);
  box-shadow: var(--shadow-4);
}

.language-btn i {
  transition: transform var(--transition-fast);
}

.language-btn[aria-expanded="true"] i {
  transform: rotate(180deg);
}

.language-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-xs);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-16);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: 1000;
  min-width: 140px;
}

.language-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-md);
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  font-size: var(--font-size-sm);
}

.language-option:hover {
  background: var(--bg-tertiary);
}

.language-option:first-child {
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.language-option:last-child {
  border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
}

.language-option .flag {
  font-size: var(--font-size-lg);
}

/* Theme Toggle */
.theme-toggle {
  padding: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  box-shadow: var(--shadow-4);
}

/* Main Content */
.main-content {
  padding: var(--space-2xl) 0;
  min-height: calc(100vh - 140px);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* Desktop Layout */
.desktop-layout {
  display: grid;
  grid-template-columns: 1fr 300px 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

/* Mobile Layout */
.mobile-layout {
  display: none;
}

/* Panel Styles */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-8);
  overflow: hidden;
  transition: box-shadow var(--transition-normal);
}

.panel:hover {
  box-shadow: var(--shadow-16);
}

.panel-header {
  padding: var(--space-xl);
  border-bottom: 1px solid var(--border-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-secondary);
}

.panel-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.panel-actions {
  display: flex;
  gap: var(--space-sm);
}

/* Button Styles */
.btn-icon {
  padding: var(--space-sm);
  background: transparent;
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}

.btn-icon:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.btn-icon:active {
  transform: scale(0.95);
}

.btn {
  padding: var(--space-md) var(--space-xl);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  justify-content: center;
  text-decoration: none;
}

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

.btn.primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  box-shadow: var(--shadow-4);
}

.btn.secondary {
  background: var(--bg-card);
  color: var(--text-primary);
}

.btn.secondary:hover {
  background: var(--bg-tertiary);
  box-shadow: var(--shadow-4);
}

/* Textarea Styles */
.textarea-container {
  position: relative;
  padding: var(--space-xl);
  height: 400px;
}

.main-textarea {
  width: 100%;
  height: 100%;
  border: none;
  outline: none;
  resize: none;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: var(--text-primary);
  background: transparent;
  padding: 0;
}

.main-textarea::placeholder {
  color: var(--text-tertiary);
}

.main-textarea:focus {
  outline: none;
}

/* Drop Zone */
.drop-zone {
  position: absolute;
  top: var(--space-xl);
  left: var(--space-xl);
  right: var(--space-xl);
  bottom: var(--space-xl);
  border: 2px dashed var(--border-primary);
  border-radius: var(--border-radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 10;
}

.drop-zone.active {
  opacity: 1;
  visibility: visible;
  border-color: var(--primary-color);
  background: rgba(0, 120, 212, 0.05);
  color: var(--primary-color);
}

.drop-zone i {
  font-size: var(--font-size-3xl);
}

.drop-zone p {
  font-size: var(--font-size-lg);
  font-weight: 500;
}

/* Character Count */
.char-count {
  position: absolute;
  bottom: var(--space-md);
  right: var(--space-xl);
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-sm);
}

/* Control Panel */
.controls-grid {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.control-group h3 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 0;
}

.control-btn {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: left;
  width: 100%;
}

.control-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-4);
  transform: translateY(-1px);
}

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

.control-btn.primary {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  font-weight: 600;
}

.control-btn.primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}

.control-btn i {
  width: 20px;
  text-align: center;
  color: var(--primary-color);
}

.control-btn.primary i {
  color: white;
}

/* Action Bar */
.action-bar {
  position: fixed;
  bottom: var(--space-2xl);
  right: var(--space-2xl);
  display: flex;
  gap: var(--space-sm);
  z-index: 50;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  font-weight: 500;
  box-shadow: var(--shadow-8);
}

.action-btn:hover:not(:disabled) {
  background: var(--bg-tertiary);
  box-shadow: var(--shadow-16);
  transform: translateY(-2px);
}

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

/* Toast Notifications */
.toast {
  position: fixed;
  top: var(--space-2xl);
  right: var(--space-2xl);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-16);
  padding: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  z-index: 1000;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  max-width: 400px;
}

.toast.show {
  transform: translateX(0);
}

.toast-content {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex: 1;
}

.toast-icon {
  font-size: var(--font-size-lg);
}

.toast.success .toast-icon {
  color: var(--success-color);
}

.toast.error .toast-icon {
  color: var(--danger-color);
}

.toast.info .toast-icon {
  color: var(--primary-color);
}

.toast-message {
  color: var(--text-primary);
  font-size: var(--font-size-sm);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.toast-close:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Modal Styles */
.shortcuts-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.shortcuts-modal.show {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-card);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-32);
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.shortcuts-modal.show .modal-content {
  transform: scale(1);
}

.modal-header {
  padding: var(--space-xl);
  border-bottom: 1px solid var(--border-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-secondary);
}

.modal-header h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.shortcuts-list {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.shortcut-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

kbd {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-primary);
  font-size: var(--font-size-xs);
  font-family: var(--font-family);
  font-weight: 500;
}

/* Mobile Styles */
@media (max-width: 768px) {
  .desktop-layout {
    display: none;
  }
  
  .mobile-layout {
    display: block;
  }
  
  .header-container {
    padding: 0 var(--space-lg);
    gap: var(--space-lg);
  }
  
  .logo h1 {
    font-size: var(--font-size-xl);
  }
  
  .container {
    padding: 0 var(--space-lg);
  }
  
  .tab-nav {
    display: flex;
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    border: 1px solid var(--border-primary);
    overflow: hidden;
    margin-bottom: var(--space-xl);
  }
  
  .tab-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-lg);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-xs);
  }
  
  .tab-btn.active {
    background: var(--primary-color);
    color: white;
  }
  
  .tab-btn i {
    font-size: var(--font-size-lg);
  }
  
  .tab-content {
    position: relative;
    min-height: 500px;
  }
  
  .tab-pane {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .tab-pane.active {
    opacity: 1;
    visibility: visible;
    position: relative;
  }
  
  .panel.mobile {
    height: auto;
  }
  
  .textarea-container {
    height: 300px;
  }
  
  .mobile-actions {
    padding: var(--space-xl);
    border-top: 1px solid var(--border-secondary);
    display: flex;
    gap: var(--space-md);
  }
  
  .mobile-actions .btn {
    flex: 1;
  }
  
  .controls-grid.mobile {
    gap: var(--space-xl);
  }
  
  .control-btn.mobile {
    justify-content: center;
    text-align: center;
  }
  
  .action-bar {
    bottom: var(--space-lg);
    right: var(--space-lg);
  }
  
  .toast {
    top: var(--space-lg);
    right: var(--space-lg);
    left: var(--space-lg);
    max-width: none;
  }
}

/* Tablet Styles */
@media (min-width: 769px) and (max-width: 1024px) {
  .desktop-layout {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .control-panel {
    order: -1;
  }
  
  .controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
  }
  
  .textarea-container {
    height: 300px;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --border-primary: #000000;
    --text-primary: #000000;
    --bg-primary: #ffffff;
  }
  
  [data-theme="dark"] {
    --border-primary: #ffffff;
    --text-primary: #ffffff;
    --bg-primary: #000000;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print Styles */
@media print {
  .header,
  .control-panel,
  .action-bar,
  .toast,
  .shortcuts-modal {
    display: none !important;
  }
  
  .main-content {
    padding: 0;
  }
  
  .desktop-layout {
    display: block;
  }
  
  .panel {
    box-shadow: none;
    border: 1px solid #000;
    page-break-inside: avoid;
  }
}

/* Focus Styles for Accessibility */
*:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Selection Styles */
::selection {
  background: var(--primary-color);
  color: white;
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--neutral-60);
  border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--neutral-70);
}

/* Animation Classes */
.fade-in {
  animation: fadeIn var(--transition-normal) ease-out;
}

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

.bounce {
  animation: bounce 0.6s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translate3d(0, 0, 0);
  }
  40%, 43% {
    transform: translate3d(0, -10px, 0);
  }
  70% {
    transform: translate3d(0, -5px, 0);
  }
  90% {
    transform: translate3d(0, -2px, 0);
  }
}