/**
 * DeepLX Translation App - Custom Styles
 * 
 * This stylesheet provides custom styling for the DeepLX translation app,
 * including RTL/LTR text support, animations, and enhanced UI components.
 * 
 * @author Xi Xu
 * @version 1.0.0
 */

/* ==========================================================================
   Base Styles
   ========================================================================== */

body {
  font-family: "Inter", sans-serif;
}

/* ==========================================================================
   Text Direction Support (RTL/LTR)
   ========================================================================== */

/* RTL support for Arabic and other right-to-left languages */
.rtl-text {
  direction: rtl;
  text-align: right;
  unicode-bidi: embed;
}

/* LTR support for left-to-right languages */
.ltr-text {
  direction: ltr;
  text-align: left;
  unicode-bidi: embed;
}

/* Smooth transition for direction changes */
.translate-textarea {
  transition: direction 0.3s ease, text-align 0.3s ease;
}

/* ==========================================================================
   Form Elements and Inputs
   ========================================================================== */

/* Translation textarea styling */
.translate-textarea {
  background-color: #2d3748; /* Dark gray background */
  color: #e2e8f0; /* Light gray text */
  border: 1px solid #4a5568; /* Border color */
  min-height: 200px; /* Minimum height for better UX */
  resize: vertical; /* Allow vertical resizing only */
}

/* Focus states for input elements */
.translate-textarea:focus,
.api-input:focus {
  outline: none;
  border-color: #4299e1; /* Blue border on focus */
  box-shadow: 0 0 0 2px rgba(66, 153, 225, 0.5);
}

/* Enhanced textarea focus effects */
.translate-textarea:focus {
  outline: none;
  border-color: #4299e1;
  box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
  transform: scale(1.01);
  transition: all 0.2s ease;
}

/* Language selector styling */
.lang-select {
  background-color: #4a5568;
  color: #e2e8f0;
  border: 1px solid #718096;
}

/* API input field styling */
.api-input {
  background-color: #2d3748;
  border: 1px solid #4a5568;
}

/* Input field enhancements */
.api-input:focus,
.lang-select:focus {
  outline: none;
  border-color: #4299e1;
  box-shadow: 0 0 0 2px rgba(66, 153, 225, 0.2);
  transition: all 0.2s ease;
}

/* ==========================================================================
   Interactive Elements and Buttons
   ========================================================================== */

/* Action button base styling */
.action-btn {
  transition: all 0.2s ease-in-out;
}

.action-btn:hover:not(:disabled) {
  background-color: #4a5568;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.action-btn:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.action-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Loading spinner animation */
#loadingSpinner {
  border-top-color: #4299e1;
  animation: spin 1s linear infinite;
  box-shadow: 0 0 10px rgba(66, 153, 225, 0.3);
}

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

/* ==========================================================================
   History Panel and Components
   ========================================================================== */

/* History item container styling */
.history-item {
  background-color: #374151;
  border: 1px solid #4b5563;
  border-radius: 0.5rem;
  padding: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.history-item:hover {
  background-color: #4b5563;
  transform: translateX(4px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* History item text elements */
.history-item .source-text {
  color: #d1d5db;
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

.history-item .target-text {
  color: #9ca3af;
  font-size: 0.875rem;
}

.history-item .lang-info {
  color: #6b7280;
  font-size: 0.75rem;
  margin-top: 0.25rem;
}

/* RTL support for history items */
.history-item .source-text.rtl-text,
.history-item .target-text.rtl-text {
  direction: rtl;
  text-align: right;
}

/* ==========================================================================
   UI Components and Controls
   ========================================================================== */

/* Toggle switch styles */
.peer:checked ~ .peer-checked\:bg-blue-600 {
  background-color: #2563eb;
}

/* Enhanced toggle switch */
.peer:checked ~ div {
  background-color: #2563eb;
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
}

/* Scrollbar styles for history list */
#historyList::-webkit-scrollbar {
  width: 6px;
}

#historyList::-webkit-scrollbar-track {
  background: #374151;
  border-radius: 3px;
}

#historyList::-webkit-scrollbar-thumb {
  background: #6b7280;
  border-radius: 3px;
}

#historyList::-webkit-scrollbar-thumb:hover {
  background: #9ca3af;
}

/* Panel backdrop blur effect */
#historyPanel,
#settingsPanel {
  backdrop-filter: blur(4px);
}

/* Status message animations */
#statusMessage {
  transition: all 0.3s ease;
}

/* Quick tips styling */
.bg-gray-700 {
  background: linear-gradient(135deg, #374151 0%, #4b5563 100%);
  border: 1px solid #6b7280;
}

/* ==========================================================================
   Animations and Effects
   ========================================================================== */

/* Animation keyframes */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
    background-color: #10b981;
  }
  100% {
    transform: scale(1);
  }
}

/* Animation classes */
.animate-fade-in {
  animation: fadeIn 0.6s ease-out;
}

.animate-fade-in-delay {
  animation: fadeIn 0.6s ease-out 0.2s both;
}

.animate-fade-in-delay-3 {
  animation: fadeIn 0.6s ease-out 0.6s both;
}

.animate-slide-up {
  animation: slideUp 0.5s ease-out;
}

/* Copy button pulse effect when clicked */
.copy-success {
  animation: pulse 0.3s ease-in-out;
}

/* ==========================================================================
   Character Counter and Status
   ========================================================================== */

/* Character counter styling */
#charCount {
  transition: color 0.2s ease;
}

.char-warning {
  color: #fbbf24 !important;
}

.char-danger {
  color: #ef4444 !important;
}

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

/* Responsive improvements */
@media (max-width: 768px) {
  .animate-slide-up {
    animation: slideUp 0.3s ease-out;
  }

  .action-btn:hover {
    transform: none;
    box-shadow: none;
  }
}