/* CSS Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
/* CSS Variables for Theme */
:root {
  /* Light Theme Colors */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  --success-500: #10b981;
  --warning-500: #f59e0b;
  --error-500: #ef4444;

  /* Weak Colors for Tags */
  --weak-color-1: #ffe0b2; /* Light Orange */
  --weak-color-2: #c8e6c9; /* Light Green */
  --weak-color-3: #bbdefb; /* Light Blue */
  --weak-color-4: #f8bbd0; /* Light Pink */
  --weak-color-5: #e1bee7; /* Light Purple */
  --weak-color-6: #d1c4e9; /* Light Indigo */
  --weak-color-7: #b2ebf2; /* Light Cyan */
  --weak-color-8: #ffccbc; /* Light Deep Orange */
  --weak-color-9: #f0f4c3; /* Light Lime */
  --weak-color-10: #cfd8dc; /* Blue Grey */

  /* Layout */riables */
  --bg-primary: #ffffff;
  --bg-secondary: var(--gray-50);
  --bg-tertiary: var(--gray-100);
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-600);
  --text-tertiary: var(--gray-400);
  --border-color: var(--gray-200);
  --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-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Layout */
  --container-max-width: 1200px;
  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;

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

/* Dark Theme */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: var(--gray-900);
    --bg-secondary: var(--gray-800);
    --bg-tertiary: var(--gray-700);
    --text-primary: var(--gray-100);
    --text-secondary: var(--gray-300);
    --text-tertiary: var(--gray-500);
    --border-color: var(--gray-700);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --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 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
  }
}

/* Base Styles */
html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Loading Indicator */
.loading-indicator {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.loading-indicator.show {
  opacity: 1;
  visibility: visible;
}

@media (prefers-color-scheme: dark) {
  .loading-indicator {
    background: rgba(17, 24, 39, 0.9);
  }
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--primary-200);
  border-top: 3px solid var(--primary-600);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

.loading-indicator span {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

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

/* Header */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-text {
  display: none; /* Hide text on smaller screens */
}

@media (min-width: 768px) {
  .logo-text {
    display: inline; /* Show text on larger screens */
  }
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--primary-600);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-600);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

/* Search Section */
.search-section {
  padding: 2rem 1.5rem;
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--bg-secondary) 100%);
}

.search-container {
  max-width: 1200px;
  margin: 0 auto;
}

.search-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
}

@media (prefers-color-scheme: dark) {
  .search-card {
    background: rgba(17, 24, 39, 0.95);
  }
}

.search-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), 0 0 0 1px var(--primary-200);
}

.search-header {
  text-align: center;
  margin-bottom: 2rem;
}

.search-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  background: linear-gradient(135deg, #000, var(--primary-800));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.search-description {
  color: var(--text-secondary);
  font-size: 1rem;
}

.search-input-group {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.search-input {
  flex: 1;
  padding: 1rem 1.25rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  font-size: 1rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
}

.search-input:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-100);
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.search-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  background: linear-gradient(135deg, #4aafbf, var(--primary-700));
  color: white;
  border: none;
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.search-button:hover {
  background: linear-gradient(135deg, #7bd81d, var(--primary-800));
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

.search-button:active {
  transform: translateY(0);
}

.search-icon {
  width: 1.25rem;
  height: 1.25rem;
}

.search-help {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  text-align: center;
  margin-bottom: 1.5rem;
}

/* Search Suggestions */
.search-suggestions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  justify-content: center;
}

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

.suggestion-tag {
  padding: 0.5rem 1rem;
  background: var(--primary-50);
  color: var(--primary-700);
  border: 1px solid var(--primary-200);
  border-radius: var(--border-radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.suggestion-tag:hover {
  background: var(--primary-100);
  border-color: var(--primary-300);
  transform: translateY(-1px);
}

@media (prefers-color-scheme: dark) {
  .suggestion-tag {
    background: var(--gray-700);
    color: var(--primary-300);
    border-color: var(--gray-600);
  }
  
  .suggestion-tag:hover {
    background: var(--gray-600);
    border-color: var(--primary-400);
  }
}

/* Results Section */
.results-section {
  padding: 2rem 1.5rem;
  min-height: 400px;
}

.results-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.search-results {
  animation: fadeIn var(--transition-normal);
}

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

/* Result Cards */
.result-brand-group {
  margin-bottom: 2rem;
  background: #ffffff;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  border: 1px solid #e9ecef;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.result-brand-group:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.result-brand-header {
  background: #f1f3f4;
  color: #495057;
  padding: 1rem 1.5rem;
  font-weight: 600;
  font-size: 1.125rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid #e9ecef;
}

.result-brand-header::before {
  content: '🏷️';
  font-size: 1.25rem;
}

.result-tags-container {
  padding: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.result-tag {
  padding: 0.5rem 1rem;
  background: #f8f9fa;
  color: #495057;
  border: 1px solid #e9ecef;
  border-radius: var(--border-radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

.result-tag:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  filter: brightness(0.95);
}

.result-brand-header::before {
  content: '🏷️';
  font-size: 1.25rem;
}

.result-table-container {
  overflow-x: auto;
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.result-table th {
  background: #f8f9fa;
  color: #495057;
  font-weight: 600;
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid #e9ecef;
  white-space: nowrap;
}

.result-table td {
  padding: 1rem;
  border-bottom: 1px solid #f1f3f4;
  color: #495057;
  vertical-align: top;
}

.result-table tr:hover {
  background: #f8f9fa;
  transition: background-color var(--transition-fast);
}

@media (prefers-color-scheme: dark) {
  .result-table tr:hover {
    background: var(--gray-700);
  }
}

.result-table tr:last-child td {
  border-bottom: none;
}

.password-cell {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  background: #e9ecef;
  padding: 0.5rem 0.75rem;
  border-radius: var(--border-radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: #495057;
  border: 1px solid #dee2e6;
  display: inline-block;
  min-width: 80px;
  text-align: center;
}

@media (prefers-color-scheme: dark) {
  .password-cell {
    background: linear-gradient(135deg, var(--gray-700), var(--gray-600));
    color: var(--primary-300);
    border-color: var(--gray-500);
  }
}

.empty-password {
  color: var(--text-tertiary);
  font-style: italic;
}

/* Error and Empty States */
.error-message, .empty-message {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.error-message {
  border-color: var(--error-500);
  background: #fef2f2;
}

@media (prefers-color-scheme: dark) {
  .error-message {
    background: #1f1415;
  }
}

.error-icon, .empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.error-title, .empty-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.error-title {
  color: var(--error-500);
}

.error-description, .empty-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 1.5rem 1rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.footer-section {
  margin-bottom: 2rem;
}

.footer-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-text {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.footer-list {
  list-style: none;
  color: var(--text-secondary);
}

.footer-list li {
  margin-bottom: 0.5rem;
  padding-left: 1rem;
  position: relative;
}

.footer-list li::before {
  content: '•';
  color: var(--primary-600);
  position: absolute;
  left: 0;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.copyright-info {
  margin-top: 0.5rem;
}

.copyright-info a {
  color: var(--primary-600);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.copyright-info a:hover {
  color: var(--primary-700);
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .search-card {
    padding: 1.5rem;
  }
  
  .search-input-group {
    flex-direction: column;
  }
  
  .search-button {
    justify-content: center;
  }
  
  .search-suggestions {
    justify-content: flex-start;
  }
  
  .nav-container {
    padding: 1rem;
  }
  
  .nav-links {
    gap: 1rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-section {
    padding: 2rem 1rem 1rem;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .search-section {
    padding: 2rem 1rem;
  }
  
  .search-card {
    padding: 1rem;
  }
  
  .result-table th,
  .result-table td {
    padding: 0.75rem 0.5rem;
    font-size: 0.8rem;
  }
  
  .nav-links {
    display: none;
  }
}

/* Print Styles */
@media print {
  .header,
  .hero-section,
  .search-section,
  .footer {
    display: none;
  }
  
  .results-section {
    padding: 0;
  }
  
  .result-brand-group {
    box-shadow: none;
    border: 1px solid #000;
    margin-bottom: 1rem;
    break-inside: avoid;
  }
}


/* Welcome Message Styles */
.welcome-message {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.welcome-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  display: block;
}

.welcome-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.welcome-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.welcome-examples {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.example-tag {
  padding: 0.5rem 1rem;
  background: var(--primary-50);
  color: var(--primary-700);
  border: 1px solid var(--primary-200);
  border-radius: var(--border-radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.example-tag:hover {
  background: var(--primary-100);
  border-color: var(--primary-300);
  transform: translateY(-1px);
}

@media (prefers-color-scheme: dark) {
  .example-tag {
    background: var(--gray-700);
    color: var(--primary-300);
    border-color: var(--gray-600);
  }
  
  .example-tag:hover {
    background: var(--gray-600);
    border-color: var(--primary-400);
  }
}

.welcome-note {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  font-style: italic;
}

/* Results Header */
.results-header {
  margin-bottom: 1.5rem;
  padding: 1rem 0;
  border-bottom: 2px solid var(--border-color);
}

.results-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

/* Empty Results Styles */
.empty-message {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.empty-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

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