/* CSS Custom Properties for Color Variables */
:root {
  /* Light theme colors */
  --diff-bg-primary: #ffffff;
  --diff-bg-secondary: #f6f8fa;
  --diff-bg-tertiary: #f1f3f4;
  --diff-border-primary: #e1e4e8;
  --diff-border-secondary: #30363d;
  --diff-text-primary: #24292e;
  --diff-text-secondary: #586069;
  --diff-text-muted: #656d76;
  --diff-text-accent: #0969da;
  
  /* Diff colors */
  --diff-addition-bg: #e6ffed;
  --diff-addition-border: #2ea043;
  --diff-addition-highlight: #acf2bd;
  --diff-deletion-bg: #ffeef0;
  --diff-deletion-border: #f85149;
  --diff-deletion-highlight: #fdb8c0;
  --diff-modification-bg: #fff8c5;
  --diff-modification-border: #fb8500;
  --diff-modification-highlight: #ffdf5d;
  
  /* Shadow */
  --diff-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --diff-shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.15);
  
  /* Stats badge colors */
  --stats-primary-bg: #0969da;
  --stats-primary-text: #ffffff;
  --stats-success-bg: #2ea043;
  --stats-success-text: #ffffff;
  --stats-danger-bg: #f85149;
  --stats-danger-text: #ffffff;
  --stats-warning-bg: #fb8500;
  --stats-warning-text: #ffffff;
  --stats-info-bg: #0ea5e9;
  --stats-info-text: #ffffff;
}

/* Dark theme colors */
@media (prefers-color-scheme: dark) {
  :root {
    --diff-bg-primary: #0d1117;
    --diff-bg-secondary: #161b22;
    --diff-bg-tertiary: #21262d;
    --diff-border-primary: #30363d;
    --diff-border-secondary: #21262d;
    --diff-text-primary: #f0f6fc;
    --diff-text-secondary: #8b949e;
    --diff-text-muted: #6e7681;
    --diff-text-accent: #58a6ff;
    
    --diff-addition-bg: #033a16;
    --diff-addition-border: #2ea043;
    --diff-addition-highlight: #2ea043;
    --diff-deletion-bg: #490202;
    --diff-deletion-border: #f85149;
    --diff-deletion-highlight: #f85149;
    --diff-modification-bg: #341a00;
    --diff-modification-border: #fb8500;
    --diff-modification-highlight: #9e6a03;
    
    --diff-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --diff-shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.4);
    
    --stats-primary-bg: #1f6feb;
    --stats-success-bg: #238636;
    --stats-danger-bg: #da3633;
    --stats-warning-bg: #fb8500;
    --stats-info-bg: #0ea5e9;
  }
}

/* Modern Diff Component Styles */
.diff-container {
  background-color: var(--diff-bg-primary);
  border: 1px solid var(--diff-border-primary);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--diff-shadow);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  transition: box-shadow 0.2s ease-in-out;
}

.diff-container:hover {
  box-shadow: var(--diff-shadow-hover);
}

.diff-container .diff-expand-notice {
  text-align: center;
  border-top: 1px solid var(--diff-border-primary);
  margin: 0;
  background-color: var(--diff-bg-secondary);
  padding: 12px;
  color: var(--diff-text-secondary);
  font-size: 14px;
  font-weight: 500;
}

.diff-container .diff-header {
  border-bottom: 1px solid var(--diff-border-primary);
  background: linear-gradient(135deg, var(--diff-bg-secondary) 0%, var(--diff-bg-tertiary) 100%);
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 50px;
  padding: 0 16px;
}

.diff-container .diff-footer {
  border-top: 1px solid var(--diff-border-primary);
  background: linear-gradient(135deg, var(--diff-bg-secondary) 0%, var(--diff-bg-tertiary) 100%);
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 50px;
  padding: 0 16px;
}

.diff-container .diff-panes {
  display: flex;
  background-color: var(--diff-bg-primary);
}

.diff-container .diff-panes .diff-pane {
  flex: 1;
  border-right: 1px solid var(--diff-border-primary);
}

.diff-container .diff-panes .diff-pane:last-child {
  border-right: none;
}

.diff-container .diff-panes .diff-pane .line-text {
  word-break: break-all;
  word-wrap: break-word;
}

/* Stats Badge Styling */
.diff-stats-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0;
}

.diff-stats-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
  transition: all 0.2s ease-in-out;
  border: 1px solid transparent;
}

.diff-stats-badge:hover {
  transform: translateY(-1px);
  box-shadow: var(--diff-shadow);
}

.diff-stats-badge.primary {
  background-color: var(--stats-primary-bg);
  color: var(--stats-primary-text);
}

.diff-stats-badge.success {
  background-color: var(--stats-success-bg);
  color: var(--stats-success-text);
}

.diff-stats-badge.danger {
  background-color: var(--stats-danger-bg);
  color: var(--stats-danger-text);
}

.diff-stats-badge.warning {
  background-color: var(--stats-warning-bg);
  color: var(--stats-warning-text);
}

.diff-stats-badge.info {
  background-color: var(--stats-info-bg);
  color: var(--stats-info-text);
}

.diff-stats-badge .badge-icon {
  margin-right: 4px;
  font-size: 10px;
}

/* Left Pane (Original/Old) */
.diff-pane-left {
  margin: 0;
  padding: 0;
  overflow: auto;
  font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.5;
}

.diff-pane-left .line-number.modified {
  background-color: var(--diff-modification-bg);
  border-right: 3px solid var(--diff-modification-border);
}

.diff-pane-left .line-number.deleted {
  background-color: var(--diff-deletion-bg);
  border-right: 3px solid var(--diff-deletion-border);
}

.diff-pane-left .deleted-line {
  background-color: var(--diff-deletion-bg);
  border-left: 3px solid var(--diff-deletion-border);
}

.diff-pane-left .modified-line {
  background-color: var(--diff-modification-bg);
  border-left: 3px solid var(--diff-modification-border);
}

/* Right Pane (New/Modified) */
.diff-pane-right {
  margin: 0;
  padding: 0;
  overflow: auto;
  font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.5;
}

.diff-pane-right .line-number.modified {
  background-color: var(--diff-modification-bg);
  border-right: 3px solid var(--diff-modification-border);
}

.diff-pane-right .line-number.inserted {
  background-color: var(--diff-addition-bg);
  border-right: 3px solid var(--diff-addition-border);
}

.diff-pane-right .modified-line {
  background-color: var(--diff-modification-bg);
  border-left: 3px solid var(--diff-modification-border);
}

.diff-pane-right .inserted-line {
  background-color: var(--diff-addition-bg);
  border-left: 3px solid var(--diff-addition-border);
}

.diff-pane-right .deleted-line {
  background-color: var(--diff-deletion-bg);
  border-left: 3px solid var(--diff-deletion-border);
}

/* Character-level highlighting */
.diff-pane-right .inserted-character {
  background-color: var(--diff-addition-highlight);
  border-radius: 2px;
  padding: 0 1px;
}

.diff-pane-right .modified-character {
  background-color: var(--diff-modification-highlight);
  border-radius: 2px;
  padding: 0 1px;
}

.diff-pane-left .deleted-character {
  background-color: var(--diff-deletion-highlight);
  border-radius: 2px;
  padding: 0 1px;
}


/* Table styling */
table.diff {
  background-color: var(--diff-bg-primary);
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  border-spacing: 0;
}

table.diff td.line-number {
  width: 1%;
  min-width: 60px;
  padding: 4px 12px;
  font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', 'Courier New', monospace;
  font-size: 12px;
  line-height: 22px;
  color: var(--diff-text-muted);
  text-align: right;
  white-space: nowrap;
  vertical-align: top;
  cursor: pointer;
  user-select: none;
  background-color: var(--diff-bg-secondary);
  border-right: 1px solid var(--diff-border-primary);
  font-weight: 400;
  transition: color 0.2s ease-in-out, background-color 0.2s ease-in-out;
}

table.diff td.line-number:hover {
  color: var(--diff-text-accent);
  background-color: var(--diff-bg-tertiary);
}

table.diff td.line {
  padding: 4px 12px;
  line-height: 22px;
  vertical-align: top;
  font-size: 14px;
  font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', 'Courier New', monospace;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: var(--diff-text-primary);
}

table.diff td .unchanged-line {
  background-color: var(--diff-bg-primary);
}

/* Improved hover effects */
table.diff tr:hover td.line-number {
  background-color: var(--diff-bg-tertiary);
}

table.diff tr:hover td.line {
  background-color: rgba(var(--diff-border-primary), 0.3);
}

/* Responsive improvements */
@media (max-width: 768px) {
  .diff-container .diff-panes {
    flex-direction: column;
  }
  
  .diff-container .diff-panes .diff-pane {
    border-right: none;
    border-bottom: 1px solid var(--diff-border-primary);
  }
  
  .diff-container .diff-panes .diff-pane:last-child {
    border-bottom: none;
  }
  
  table.diff td.line-number {
    min-width: 50px;
    padding: 2px 8px;
    font-size: 11px;
  }
  
  table.diff td.line {
    padding: 2px 8px;
    font-size: 13px;
  }
  
  .diff-stats-container {
    gap: 4px;
  }
  
  .diff-stats-badge {
    font-size: 11px;
    padding: 3px 6px;
  }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
  .diff-container,
  .diff-stats-badge,
  table.diff td.line-number,
  table.diff td.line {
    transition: none;
  }
  
  .diff-container .diff-header,
  .diff-container .diff-footer {
    background: var(--diff-bg-secondary);
  }
}

/* Focus states for accessibility */
table.diff td.line-number:focus {
  outline: 2px solid var(--diff-text-accent);
  outline-offset: -2px;
}

.diff-stats-badge:focus {
  outline: 2px solid var(--diff-text-accent);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .diff-container {
    box-shadow: none;
    border: 1px solid #000;
  }
  
  .diff-stats-badge {
    border: 1px solid #000;
    background-color: transparent !important;
    color: #000 !important;
  }
}