/**
 * Changelog Modal Component Styles
 * Display changelog with blur background modal and version badges
 */

/* Modal Overlay */
.changelog-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1001;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-speed);
}

.changelog-overlay:not(.hidden) {
  opacity: 1;
  visibility: visible;
}

.changelog-overlay.hidden {
  display: none;
}

/* Modal Container */
.changelog-modal-container {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-xl);
  width: clamp(320px, 90vw, 600px);
  max-height: clamp(400px, 90vh, 700px);
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  animation: changelogSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes changelogSlideIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(-30px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Modal Header */
.changelog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: var(--padding-xl);
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(135deg, var(--card-color), var(--search-bar-color));
  flex-shrink: 0;
}

.changelog-title-section {
  flex: 1;
  margin-right: var(--margin-lg);
}

.changelog-badge {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  margin-bottom: var(--margin-md);
  flex-wrap: wrap;
}

.version-badge {
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  color: var(--bg-color);
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: var(--padding-xs) var(--padding-md);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.release-type-badge {
  font-size: var(--font-size-xs);
  font-weight: 500;
  padding: var(--padding-xs) var(--padding-sm);
  border-radius: var(--border-radius-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.release-type-badge.major {
  background: #e63946;
  color: white;
}

.release-type-badge.minor {
  background: #f59e0b;
  color: white;
}

.release-type-badge.patch {
  background: #22c55e;
  color: white;
}

.changelog-title {
  font-size: var(--font-size-xxl);
  font-weight: 700;
  margin: 0 0 var(--margin-sm) 0;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.changelog-date {
  display: flex;
  align-items: center;
  gap: var(--gap-xs);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

.changelog-date svg {
  width: var(--icon-size-sm);
  height: var(--icon-size-sm);
  stroke-width: 2;
}

.changelog-close-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  border-radius: 999px;
  transition: all var(--transition-speed);
  z-index: 10002; /* ensure above modal content */
  flex-shrink: 0;
}

.changelog-close-btn:hover,
.changelog-close-btn:focus-visible {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
  outline: none;
}

.changelog-close-btn svg {
  width: var(--icon-size-md);
  height: var(--icon-size-md);
  stroke-width: 2;
}

/* Modal Content */
.changelog-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--padding-xl);
}

.changelog-content::-webkit-scrollbar {
  width: 6px;
}

.changelog-content::-webkit-scrollbar-track {
  background: var(--search-bar-color);
  border-radius: 3px;
}

.changelog-content::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.changelog-content::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Changelog Sections */
.changelog-section {
  margin-bottom: var(--margin-xxl);
}

.changelog-section:last-child {
  margin-bottom: 0;
}

.changelog-section-header {
  margin-bottom: var(--margin-lg);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.section-icon {
  font-size: var(--font-size-xl);
  line-height: 1;
}

.item-count {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 400;
}

/* Changes List */
.changes-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--margin-md);
}

.change-item {
  background: var(--card-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--padding-lg);
  transition: all var(--transition-speed);
  position: relative;
}

.change-item:hover {
  border-color: var(--text-secondary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.change-content {
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--text-primary);
}

.change-item.new {
  border-left: 4px solid #22c55e;
}

.change-item.improved {
  border-left: 4px solid #3b82f6;
}

.change-item.fixed {
  border-left: 4px solid #f59e0b;
}

.change-item.security {
  border-left: 4px solid #e63946;
}

.change-item.deprecated {
  border-left: 4px solid #8b5cf6;
}

.change-item.breaking {
  border-left: 4px solid #ef4444;
}

.change-item.more-items {
  background: var(--search-bar-color);
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--padding-md);
  text-align: center;
}

.show-more-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--gap-xs);
  margin: 0 auto;
  padding: var(--padding-sm);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-speed);
}

.show-more-btn:hover {
  color: var(--text-primary);
  background-color: var(--border-color);
}

.show-more-btn svg {
  width: var(--icon-size-sm);
  height: var(--icon-size-sm);
  stroke-width: 2;
  transition: transform var(--transition-speed);
}

.show-more-btn:hover svg {
  transform: translateY(1px);
}

/* Empty State */
.changelog-empty {
  text-align: center;
  padding: var(--padding-xxl);
  color: var(--text-secondary);
}

.changelog-empty svg {
  width: 48px;
  height: 48px;
  stroke-width: 1.5;
  margin: 0 auto var(--margin-lg) auto;
  opacity: 0.5;
}

.changelog-empty h3 {
  font-size: var(--font-size-lg);
  margin: 0 0 var(--margin-sm) 0;
  color: var(--text-primary);
}

.changelog-empty p {
  margin: 0;
  font-size: var(--font-size-sm);
}

/* Modal Footer */
.changelog-footer {
  padding: var(--padding-xl);
  border-top: 1px solid var(--border-color);
  background: var(--card-color);
  flex-shrink: 0;
}

.changelog-actions {
  display: flex;
  gap: var(--gap-md);
  justify-content: center;
  margin-bottom: var(--margin-lg);
  flex-wrap: wrap;
}

.changelog-notice {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  margin: 0;
}

.changelog-link {
  color: var(--text-secondary);
  text-decoration: underline;
  transition: color var(--transition-speed);
}

.changelog-link:hover {
  color: var(--text-primary);
}

/* Button Styles */
.btn {
  border: none;
  border-radius: var(--border-radius-md);
  padding: var(--padding-md) var(--padding-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-speed);
  display: inline-flex;
  align-items: center;
  gap: var(--gap-xs);
  text-decoration: none;
  font-family: var(--font-family);
  min-width: 120px;
  justify-content: center;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--text-secondary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
  background: var(--border-color);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--card-color);
  transform: translateY(-1px);
}

.btn svg {
  width: var(--icon-size-sm);
  height: var(--icon-size-sm);
  stroke-width: 2;
}

/* Responsive Design */
@media (max-width: 768px) {
  .changelog-modal-container {
    width: 95vw;
    max-height: 90vh;
    margin: var(--padding-md);
  }
  
  .changelog-header {
    padding: var(--padding-lg);
    flex-direction: column;
    gap: var(--gap-md);
  }
  
  .changelog-title-section {
    margin-right: 0;
  }
  
  .changelog-title {
    font-size: var(--font-size-xl);
  }
  
  .changelog-content {
    padding: var(--padding-lg);
  }
  
  .changelog-footer {
    padding: var(--padding-lg);
  }
  
  .changelog-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .changelog-modal-container {
    width: 100vw;
    height: 100vh;
    max-height: none;
    border-radius: 0;
    margin: 0;
  }
  
  .changelog-header {
    padding: var(--padding-md);
  }
  
  .changelog-content {
    padding: var(--padding-md);
  }
  
  .changelog-footer {
    padding: var(--padding-md);
  }
  
  .section-title {
    font-size: var(--font-size-md);
  }
  
  .change-item {
    padding: var(--padding-md);
  }
}

/* Animation for expanding sections */
.changelog-section.expanding .changes-list {
  animation: expandList 0.3s ease-out;
}

@keyframes expandList {
  from {
    opacity: 0;
    max-height: 0;
  }
  to {
    opacity: 1;
    max-height: 1000px;
  }
}

/* Body class for modal open */
body.changelog-open {
  overflow: hidden;
}

/* Focus styles */
.changelog-close-btn:focus,
.btn:focus,
.show-more-btn:focus {
  outline: 2px solid var(--text-secondary);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .changelog-overlay {
    position: static;
    background: none;
    backdrop-filter: none;
  }
  
  .changelog-modal-container {
    box-shadow: none;
    border: 1px solid #000;
    max-height: none;
    height: auto;
  }
  
  .changelog-footer {
    display: none;
  }
  
  .btn {
    display: none;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .changelog-modal-container {
    border: 2px solid var(--text-primary);
  }
  
  .change-item {
    border: 2px solid var(--text-primary);
  }
  
  .btn-primary {
    border: 2px solid var(--bg-color);
  }
  
  .btn-secondary {
    border: 2px solid var(--text-primary);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .changelog-overlay,
  .changelog-modal-container,
  .change-item,
  .btn,
  .show-more-btn {
    transition: none;
  }
  
  .changelog-modal-container {
    animation: none;
  }
  
  .change-item:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
  .changelog-modal-container {
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.8);
  }
}

/* Light mode adaptations */
@media (prefers-color-scheme: light) {
  .changelog-modal-container {
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
  }
}

/* Performance optimizations */
.changelog-modal-container,
.change-item {
  will-change: transform;
}

/* Loading state */
.changelog-loading {
  opacity: 0.7;
  pointer-events: none;
}

.changelog-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 24px;
  height: 24px;
  border: 2px solid transparent;
  border-top: 2px solid var(--text-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  transform: translate(-50%, -50%);
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}