/* Modern CSS Variables for Theming */
:root {
  /* Light theme */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --accent-primary: #3b82f6;
  --accent-hover: #2563eb;
  --border-color: #e2e8f0;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --error-bg: #fee2e2;
  --error-border: #f87171;
  --success-bg: #dcfce7;
  --success-border: #4ade80;
  --warning-bg: #fef3c7;
  --warning-border: #fbbf24;
  --skeleton-bg: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  --transition-duration: 0.3s;
  --header-height: 70px;
  --filter-panel-width: 380px;
}

[data-theme="dark"] {
  /* Dark theme */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent-primary: #60a5fa;
  --accent-hover: #3b82f6;
  --border-color: #334155;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --error-bg: #450a0a;
  --error-border: #f87171;
  --success-bg: #052e16;
  --success-border: #4ade80;
  --warning-bg: #422006;
  --warning-border: #fbbf24;
  --skeleton-bg: linear-gradient(90deg, #1e293b 25%, #334155 50%, #1e293b 75%);
}

/* Base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: 
    background-color var(--transition-duration), 
    color var(--transition-duration), 
    border-color var(--transition-duration),
    box-shadow var(--transition-duration);
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color var(--transition-duration);
}

/* Header styles */
header {
  background-color: var(--bg-secondary);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 2rem;
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo i {
  color: var(--accent-primary);
  font-size: 1.8rem;
}

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

.theme-toggle {
  background: var(--bg-tertiary);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s;
  color: var(--text-primary);
}

.theme-toggle:hover {
  transform: scale(1.1);
}

.filter-btn {
  background-color: var(--accent-primary);
  color: white;
  border: none;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background-color var(--transition-duration);
}

.filter-btn:hover {
  background-color: var(--accent-hover);
}

/* Filter panel */
.filter-panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: 100%;
  max-width: var(--filter-panel-width);
  background-color: var(--bg-secondary);
  box-shadow: -5px 0 15px rgba(0, 0, 0, 0.15);
  z-index: 200;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  padding: 2rem;
  overflow-y: auto;
}

.filter-panel.active {
  transform: translateX(0);
}

.filter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.filter-header h2 {
  color: var(--text-primary);
  font-size: 1.5rem;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-duration);
}

.close-btn:hover {
  color: var(--accent-primary);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.9rem 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  color: var(--text-primary);
  transition: border-color var(--transition-duration);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text-primary);
}

.radio-option input {
  accent-color: var(--accent-primary);
}

.apply-btn {
  width: 100%;
  padding: 1rem;
  background-color: var(--accent-primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-duration);
  margin-top: 1rem;
}

.apply-btn:hover {
  background-color: var(--accent-hover);
}

/* Main content */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  padding-top: calc(var(--header-height) + 2rem);
}

.search-container {
  margin-bottom: 2.5rem;
}

.search-box {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.search-icon {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
}

.search-input {
  width: 100%;
  padding: 1.25rem 1.25rem 1.25rem 3.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 1.1rem;
  color: var(--text-primary);
  box-shadow: var(--card-shadow);
  transition: border-color var(--transition-duration);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.search-btn {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--accent-primary);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-duration);
}

.search-btn:hover {
  background-color: var(--accent-hover);
}

/* Results section */
.results-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.results-count {
  color: var(--text-primary);
  font-size: 0.95rem;
}

.loading-indicator {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  opacity: 0;
  transition: opacity 0.3s;
  color: var(--text-secondary);
}

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

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(59, 130, 246, 0.2);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
  margin-bottom: 2rem;
}

.repo-card {
  background-color: var(--bg-secondary);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid var(--border-color);
}

.repo-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 25px -5px rgba(0, 0, 0, 0.2);
}

.card-content {
  padding: 1.75rem;
}

.repo-header {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--border-color);
}

.repo-info {
  flex: 1;
  min-width: 0;
}

.repo-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-decoration: none;
  display: block;
  margin-bottom: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.repo-name:hover {
  text-decoration: underline;
}

.archived-badge {
  display: inline-block;
  background-color: var(--warning-bg);
  color: var(--warning-border);
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.5rem;
}

.repo-description {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.stat {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.stat i {
  color: var(--text-primary);
}

/* Language tags */
.selected-languages {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  min-height: 40px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px;
  background-color: var(--bg-tertiary);
  min-height: 46px;
  align-items: center;
}

.language-tag {
  background-color: var(--accent-primary);
  color: white;
  border-radius: 16px;
  padding: 4px 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  animation: fadeIn 0.3s ease;
}

.language-tag .remove {
  cursor: pointer;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transition: background 0.2s;
}

.language-tag .remove:hover {
  background: rgba(255, 255, 255, 0.5);
}

.language-search-container {
  position: relative;
  margin-top: 8px;
}

/* Animation for fade in */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

.no-languages {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 4px 8px;
}

.language-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

/* Language Search Styles */
.language-search-container {
  position: relative;
}

.language-search-container:focus-within .language-dropdown {
  display: block;
}

.language-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  max-height: 300px;
  overflow-y: auto;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 100;
  display: none;
  margin-top: 4px;
}

.language-dropdown.visible {
  display: block;
}

.language-option {
  padding: 10px 15px;
  cursor: pointer;
  transition: background-color 0.2s;
  color: var(--text-primary);
  display: flex;
  align-items: center;
}

.language-option.selected {
  background-color: var(--accent-primary);
  color: white;
}

.selected-icon {
  margin-left: auto;
}

.language-option:hover, .language-option.highlighted {
  background-color: var(--accent-primary);
  color: white;
}

.language-option .name {
  flex-grow: 1;
}

.language-option .aliases {
  font-size: 0.8em;
  opacity: 0.7;
  margin-left: 10px;
}

.language-option .match {
  font-weight: bold;
  text-decoration: underline;
}

.language-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.topic-tag {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  border-radius: 2rem;
  transition: background-color var(--transition-duration);
}

.topic-tag:hover {
  background-color: var(--accent-primary);
  color: white;
}

.more-topics {
  font-size: 0.75rem;
  color: var(--text-secondary);
  align-self: center;
}

.repo-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.25rem;
  margin-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

.updated-date {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Error message */
.error-container {
  display: none;
  background-color: var(--error-bg);
  border-left: 4px solid var(--error-border);
  padding: 1.25rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  align-items: center;
  gap: 1rem;
}

.error-container:not(.hidden) {
  display: flex;
}

.error-icon {
  font-size: 1.5rem;
  color: var(--error-border);
}

.error-message {
  color: var(--text-primary);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 0;
}

.empty-icon {
  font-size: 4rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.empty-state p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Load more button */
.load-more-container {
  text-align: center;
  margin-top: 1.5rem;
}

.load-more-btn {
  background-color: var(--accent-primary);
  color: white;
  border: none;
  padding: 0.9rem 2rem;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-duration);
}

.load-more-btn:hover {
  background-color: var(--accent-hover);
}

/* Dark mode toggle animation */
.theme-icon {
  transition: transform 0.5s ease, opacity 0.3s ease;
}

.dark .fa-sun {
  transform: rotate(360deg);
}

.light .fa-moon {
  transform: rotate(360deg);
}

.fade-in {
  animation: fadeIn 0.4s ease forwards;
}

/* Responsive design */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }
  
  header {
    padding: 0 1rem;
  }
  
  .logo {
    font-size: 1.25rem;
  }
  
  .logo i {
    font-size: 1.5rem;
  }
  
  .filter-btn span {
    display: none;
  }
  
  .filter-btn i {
    margin-right: 0;
  }
  
  .filter-panel {
    width: 100%;
    max-width: none;
    padding: 1.5rem;
  }
  
  main {
    padding: 1rem;
    padding-top: calc(var(--header-height) + 1rem);
  }
  
  .search-input {
    padding: 1rem 1rem 1rem 3rem;
    font-size: 1rem;
  }
  
  .search-btn {
    padding: 0.6rem 1.25rem;
    font-size: 0.9rem;
  }
  
  .results-grid {
    grid-template-columns: 1fr;
  }
  
  .repo-card {
    max-width: 100%;
  }
}

/* Print styles */
@media print {
  header, .filter-panel, .search-container, .load-more-container {
    display: none;
  }
  
  body {
    background-color: white !important;
    color: black !important;
  }
  
  .repo-card {
    break-inside: avoid;
    box-shadow: none !important;
    border: 1px solid #ddd !important;
    margin-bottom: 1rem;
  }
  
  .results-grid {
    display: block;
  }
}