// _diff.scss — Diff page (.diff-*, .df3-* prefixes)

// ── Diff page ─────────────────────────────────────────────────────────────────

.diff-page { padding-top: var(--space-4); }

.diff-commit-header-card {
  margin-bottom: var(--space-3);
  padding: var(--space-3) var(--space-4);
}

.diff-commit-meta {
  display: flex; align-items: center; gap: var(--space-2);
  flex-wrap: wrap; margin-bottom: var(--space-2);
}

.diff-commit-sha {
  font-family: var(--font-mono); font-size: 12px; color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  border-radius: 4px; padding: 1px 6px;
}

.diff-commit-branch {
  font-size: 12px; color: var(--text-muted); font-family: var(--font-mono);
  background: var(--bg-overlay); border-radius: 4px; padding: 1px 6px;
}

.diff-commit-author { font-size: 12px; color: var(--text-secondary); }

.diff-commit-msg {
  font-size: 14px; font-weight: 500; color: var(--text-primary); margin-bottom: var(--space-1);
}

.diff-commit-parent { display: flex; align-items: center; gap: 6px; }

.diff-root-pill {
  display: inline-block; font-size: 11px; color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 12%, transparent);
  border-radius: 4px; padding: 2px 8px;
}

.diff-root-badge {
  font-size: 11px; color: var(--color-success);
}

.diff-parent-badge {
  font-size: 11px; color: var(--text-muted);
}

.diff-parent-sha {
  font-family: var(--font-mono); font-size: 11px; color: var(--color-accent);
}

// Two-panel layout: sidebar + viewer
.diff-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-3);
  align-items: start;
  min-height: 70vh;
}

@media (max-width: 768px) {
  .diff-layout { grid-template-columns: 1fr; }
  .diff-file-tree { max-height: 200px; overflow-y: auto; }
}

// File tree sidebar
.diff-file-tree {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: sticky;
  top: 64px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}

.diff-tree-header {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 12px;
  font-size: 11px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-overlay);
  position: sticky; top: 0; z-index: 1;
}

.diff-file-list {
  list-style: none; margin: 0; padding: 4px 0;
}

.diff-file-item {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 10px; cursor: pointer;
  font-size: 12px; color: var(--text-secondary);
  transition: background 0.1s, color 0.1s;
  border-left: 2px solid transparent;
  overflow: hidden;

  &:hover { background: var(--bg-overlay); color: var(--text-primary); }
  &.active {
    background: color-mix(in srgb, var(--color-accent) 10%, transparent);
    color: var(--color-accent);
    border-left-color: var(--color-accent);
  }
}

.diff-file-sign { flex-shrink: 0; width: 12px; font-family: var(--font-mono); color: var(--color-success); }
.diff-file-icon { flex-shrink: 0; font-size: 13px; }
.diff-file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: var(--font-mono); }
.diff-file-size { flex-shrink: 0; font-size: 10px; color: var(--text-muted); }

// Viewer panel
.diff-viewer {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 300px;
}

.diff-viewer-header {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  padding: 8px 12px;
  background: var(--bg-overlay);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky; top: 64px; z-index: 1;
}

.diff-file-path-bar {
  display: flex; align-items: center; gap: 8px;
}

.diff-file-path-label {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-primary);
}

.diff-hunk-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 12px;
  background: color-mix(in srgb, var(--color-accent) 6%, transparent);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 11px; color: var(--text-muted);
}

.diff-hunk-info { display: flex; align-items: center; gap: 8px; }

.diff-lang-badge {
  font-family: var(--font-mono); font-size: 10px;
  background: color-mix(in srgb, var(--color-accent) 15%, transparent);
  color: var(--color-accent);
  border-radius: 4px; padding: 1px 6px; text-transform: uppercase; letter-spacing: 0.04em;
}

.diff-code-panel { overflow-x: auto; }
.diff-code-scroll { overflow-x: auto; }

// Unified diff table
.diff-table {
  width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 12.5px; line-height: 1.5;

  td { padding: 0; border: none; vertical-align: top; white-space: pre; }
}

.diff-ln-sign {
  width: 14px; min-width: 14px; text-align: center;
  user-select: none; color: var(--color-success); opacity: 0.7;
  padding: 0 3px;
}

.diff-ln-num {
  width: 48px; min-width: 48px; text-align: right;
  user-select: none; color: var(--text-muted); opacity: 0.5;
  padding: 0 8px 0 0;
}

.diff-ln-code {
  padding-left: 4px; color: var(--text-primary);
  white-space: pre; overflow: visible;
  // Allow hljs spans to render inline
  span { display: inline; white-space: pre; }
}

.diff-line-add {
  background: color-mix(in srgb, var(--color-success) 6%, transparent);
  &:hover { background: color-mix(in srgb, var(--color-success) 12%, transparent); }
}

.diff-line-ctx { background: transparent; }

// Loading / error states
.diff-loading { padding: var(--space-5); color: var(--text-muted); font-size: 13px; }
.diff-empty   { padding: var(--space-5); color: var(--text-muted); font-size: 13px; text-align: center; }
.diff-error   { padding: var(--space-5); color: var(--color-danger); font-size: 13px; }

.spinner {
  display: inline-block; width: 14px; height: 14px; margin-right: 6px;
  border: 2px solid var(--border-default); border-top-color: var(--color-accent);
  border-radius: 50%; animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

// highlight.js theme — dark, matching our tokens
.hljs { background: transparent; }
.hljs-keyword, .hljs-selector-tag, .hljs-title { color: var(--color-accent); font-weight: 600; }
.hljs-string, .hljs-attr { color: var(--color-success); }
.hljs-comment, .hljs-quote { color: var(--text-muted); font-style: italic; }
.hljs-number, .hljs-literal, .hljs-built_in { color: #f0883e; }
.hljs-name, .hljs-tag { color: #7ee787; }
.hljs-variable, .hljs-template-variable { color: #ffa657; }
.hljs-type, .hljs-class { color: #79c0ff; font-style: italic; }
.hljs-function, .hljs-subst { color: #d2a8ff; }
.hljs-params { color: var(--text-secondary); }
.hljs-section, .hljs-meta { color: #79c0ff; }
.hljs-addition { background: color-mix(in srgb, var(--color-success) 15%, transparent); }
.hljs-deletion  { background: color-mix(in srgb, var(--color-danger)  15%, transparent); }



// Diff page v3 — df3-*
// ══════════════════════════════════════════════════════════════════════════════

.df3-page { max-width: 100%; }

// ── Header ─────────────────────────────────────────────────────────────────
.df3-header {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-4) 0 var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.df3-back {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; color: var(--text-muted); text-decoration: none;
  background: var(--surface-2); border: 1px solid var(--border-default);
  padding: 3px 8px; border-radius: var(--radius-sm);
  &:hover { color: var(--color-accent-link); border-color: var(--color-accent); }
}

.df3-sha {
  font-family: var(--font-mono); font-size: 12px;
  color: var(--text-secondary); background: var(--surface-2);
  padding: 2px 7px; border-radius: 4px;
}

.df3-branch {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; color: var(--text-muted);
  background: var(--surface-2); padding: 2px 7px; border-radius: 10px;
}

.df3-msg {
  font-size: 13px; color: var(--text-primary); font-weight: 500;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 600px;
}

// ── Stats bar ──────────────────────────────────────────────────────────────
.df3-stats-bar {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.df3-stats-row { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.df3-stat {
  display: flex; flex-direction: column; gap: 2px; min-width: 80px;
  background: var(--surface-2); border: 1px solid var(--border-default);
  border-radius: var(--radius-md); padding: var(--space-2) var(--space-3);
  &.df3-stat-add  { border-top: 2px solid #34d399; .df3-stat-n { color: #34d399; } }
  &.df3-stat-mod  { border-top: 2px solid #fbbf24; .df3-stat-n { color: #fbbf24; } }
  &.df3-stat-del  { border-top: 2px solid #f87171; .df3-stat-n { color: #f87171; } }
  &.df3-stat-files{ border-top: 2px solid #8b5cf6; .df3-stat-n { color: #c084fc; } }
  &.df3-stat-snap { border-top: 2px solid #475569; .df3-stat-n { color: var(--text-secondary); } }
  &.df3-stat-clean{ border-top: 2px solid #34d399; .df3-stat-n { color: #34d399; } }
}

.df3-stat-n {
  font-size: 20px; font-weight: 800; line-height: 1.1;
  font-variant-numeric: tabular-nums; letter-spacing: -.02em;
}

.df3-stat-l {
  font-size: 9px; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .06em; white-space: nowrap;
}

.df3-stats-meta { font-size: 12px; color: var(--text-muted); }

.df3-vs { display: flex; align-items: center; gap: var(--space-2); }

.df3-parent-sha {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--color-accent-link); text-decoration: none;
  &:hover { text-decoration: underline; }
}

.df3-root-pill {
  font-size: 10px; color: var(--text-muted);
  background: var(--surface-3); padding: 2px 7px; border-radius: 10px;
}

// ── Files ──────────────────────────────────────────────────────────────────
.df3-content { display: flex; flex-direction: column; }
.df3-files   { display: flex; flex-direction: column; gap: var(--space-4); }

.df3-file-card {
  background: var(--surface-2); border: 1px solid var(--border-default);
  border-radius: var(--radius-lg); overflow: hidden;

  &.df3-file-added   { border-left: 3px solid #22c55e; }
  &.df3-file-removed { border-left: 3px solid #ef4444; }
  &.df3-file-modified{ border-left: 3px solid #f59e0b; }
}

.df3-file-hd {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--surface-3);
  border-bottom: 1px solid var(--border-subtle);
}

.df3-file-hd-right {
  display: flex; align-items: center; gap: var(--space-3); margin-left: auto;
}

.df3-file-path {
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  color: var(--color-accent-link); text-decoration: none;
  &:hover { text-decoration: underline; }
}

.df3-ext {
  font-size: 9px; font-family: var(--font-mono);
  color: var(--text-muted); background: var(--surface-2);
  padding: 1px 4px; border-radius: 3px;
}

.df3-raw-link {
  font-size: 10px; color: var(--text-muted); text-decoration: none;
  &:hover { color: var(--color-accent-link); }
}

.df3-line-stat {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-muted);
}

.df3-stat-add { color: #34d399; }
.df3-stat-del { color: #f87171; }

// Op dot
.df3-op-dot {
  display: inline-flex; align-items: center; justify-content: center;
  width: 14px; height: 14px; border-radius: 3px;
  font-size: 10px; font-weight: 800; flex-shrink: 0;
  &.df3-op-add { background: rgba(52,211,153,0.12);  color: #34d399; }
  &.df3-op-del { background: rgba(248,113,113,0.12); color: #f87171; }
  &.df3-op-mod { background: rgba(251,191,36,0.12);  color: #fbbf24; }
}

// ── Symbol panel ───────────────────────────────────────────────────────────
.df3-sym-panel {
  border-bottom: 1px solid var(--border-subtle);
  background: var(--surface-2);
}

.df3-sym-hd {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.df3-sym-title {
  font-size: 10px; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .06em;
}

.df3-sym-count {
  font-size: 10px; color: var(--color-accent);
  background: var(--surface-3); padding: 1px 6px; border-radius: 10px;
  border: 1px solid var(--color-accent)40;
}

.df3-sym-body { padding: var(--space-1) 0; }

.df3-sym-row {
  display: flex; align-items: center; gap: var(--space-2);
  padding: 3px var(--space-4);
  &:hover { background: var(--surface-3); }
}

.df3-sym-top { font-weight: 500; }
.df3-sym-child { padding-left: var(--space-8); }

.df3-sym-indent {
  color: var(--border-default); flex-shrink: 0;
  display: flex; align-items: center;
}

.df3-sym-name {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-primary);
}

.df3-sym-desc {
  font-size: 11px; color: var(--text-muted);
  margin-left: auto; text-align: right;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 300px;
}

// Kind chips
.df3-kind {
  font-size: 9px; font-family: var(--font-mono);
  padding: 1px 5px; border-radius: 3px; flex-shrink: 0;
  &.df3-k-class  { background: #7c3aed20; color: #c084fc; }
  &.df3-k-method { background: #0369a120; color: #38bdf8; }
  &.df3-k-func   { background: #065f4620; color: #34d399; }
  &.df3-k-var    { background: #78350f20; color: #fbbf24; }
  &.df3-k-import { background: #71717a20; color: #a1a1aa; }
}

// ── Code diff table ────────────────────────────────────────────────────────
.df3-code-wrap { overflow-x: auto; }

.df3-table {
  width: 100%; border-collapse: collapse;
  font-family: var(--font-mono); font-size: 12px; line-height: 1.5;
  background: var(--surface-1);

  td { padding: 0 var(--space-2); white-space: pre; }
}

.df3-ln-sign {
  width: 16px; text-align: center; user-select: none;
  color: var(--text-muted); font-size: 11px;
}

.df3-table .df3-ln-num {
  width: 44px; text-align: right; padding-right: var(--space-3);
  color: var(--text-muted); user-select: none; border-right: 1px solid var(--border-subtle);
}

.df3-table .df3-ln-code { padding-left: var(--space-3); }

.df3-dl-add {
  background: #14532d18;
  .df3-ln-sign { color: #4ade80; }
  .df3-ln-num  { background: #14532d12; }
}

.df3-dl-del {
  background: #7f1d1d18;
  .df3-ln-sign { color: #f87171; }
  .df3-ln-num  { background: #7f1d1d12; }
}

.df3-dl-ctx { .df3-ln-sign { color: var(--border-default); } }

// Collapsed context separator
.df3-dl-ctx td { color: var(--text-muted); font-style: italic; }

// ── Misc ───────────────────────────────────────────────────────────────────
.df3-loading { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-8); color: var(--text-muted); font-size: 13px; }
.df3-empty   { padding: var(--space-6); color: var(--text-muted); font-size: 13px; text-align: center; }
.df3-no-content { padding: var(--space-4); color: var(--text-muted); font-size: 12px; text-align: center; }


// ════════════════════════════════════════════════════════════════════════════


// ── Responsive ────────────────────────────────────────────────────────────────

@media (max-width: 768px) {
  .diff-layout {
    grid-template-columns: 1fr;
  }

  .diff-file-tree {
    display: none;
  }

  .diff-hunk-header {
    font-size: 11px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .df3-layout {
    grid-template-columns: 1fr;
  }

  .df3-file-tree {
    display: none;
  }

  .diff-split-view {
    display: block;
  }

  .diff-split-view .diff-col:first-child {
    display: none;
  }

  .df3-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
}

@media (max-width: 480px) {
  .diff-page {
    padding-top: var(--space-2);
  }

  .diff-commit-header-card {
    padding: var(--space-2) var(--space-3);
  }

  .diff-filename {
    font-size: 11px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 200px;
  }

  .df3-stat-added,
  .df3-stat-removed {
    font-size: 11px;
  }
}