/* Diff view, gutter markers, image diffs, and git panel styling (FRONTEND.md § 5, § 6.10–6.12) */

/* ---------- Git Panel in Sidebar ---------- */
.git-panel-body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding: var(--sp-4);
}

.git-base-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-xs, 11px);
  color: var(--fg-muted);
}

.git-base-select {
  flex: 1;
  min-width: 0;
  background: var(--bg-1);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  padding: 3px 6px;
  font-size: var(--fs-xs, 11px);
  font-family: inherit;
}

.git-base-input {
  flex: 1;
  min-width: 0;
  font-size: var(--fs-xs, 11px);
}

.git-commit-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: var(--sp-4);
  gap: var(--sp-4);
}

.git-commit-input {
  width: 100%;
  min-height: 54px;
  resize: vertical;
  background: transparent;
  color: var(--fg);
  border: none;
  font-family: inherit;
  font-size: var(--fs-sm, 12px);
  line-height: 1.4;
  outline: none;
  box-sizing: border-box;
}

/* Two rows in the narrow sidebar: [Amend … 0 / 72], then [AI message][Commit ────]. */
.git-commit-ctrls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-3) var(--sp-4);
  border-top: 1px solid var(--border);
  padding-top: var(--sp-3);
  font-size: var(--fs-xs, 11px);
}

.git-amend-label {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  flex: none;
  cursor: pointer;
  color: var(--fg-muted);
  user-select: none;
}

.git-char-count {
  margin-left: auto;
  white-space: nowrap;
  font-size: var(--fs-xs, 11px);
  font-variant-numeric: tabular-nums;
  color: var(--fg-faint);
}

.git-char-count.over-budget {
  color: var(--danger);
  font-weight: 600;
}

.git-commit-btns {
  display: flex;
  flex: 1 1 100%;
  min-width: 0;
  gap: var(--sp-2);
}

/* In a narrow sidebar the AI button drops its label (the aria-label and tooltip remain) so the
   Commit label is never clipped. */
.git-commit-card { container-type: inline-size; }
.git-commit-btns .git-ai-btn { flex: none; }
@container (max-width: 240px) { .git-ai-label { display: none; } }
.git-commit-btns .git-commit-btn { flex: 1; min-width: 0; justify-content: center; }

.git-stderr {
  background: color-mix(in srgb, var(--danger) 8%, var(--bg-1));
  border: 1px solid color-mix(in srgb, var(--danger) 30%, var(--border));
  border-radius: var(--r-xs);
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--fs-xs, 11px);
}

.git-stderr summary {
  cursor: pointer;
  color: var(--danger);
  font-weight: 500;
}

.git-stderr-pre {
  margin: var(--sp-2) 0 0;
  white-space: pre-wrap;
  word-break: break-all;
  font-family: var(--font-mono, monospace);
  color: var(--fg);
}

.git-group-head {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.git-group-title {
  font-weight: 500;
  flex: 1;
}

.git-group-actions {
  display: inline-flex;
  gap: 2px;
}

.git-file-row {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  cursor: pointer;
}

/* Fixed-width column so it never shrinks and its buttons land at the same
   x position in every row, regardless of how much the name/dir text truncates. */
.lr-actions {
  display: inline-flex;
  align-items: center;
  flex: none;
  gap: 2px;
}

.git-recent-details {
  border-top: 1px solid var(--border);
  padding-top: var(--sp-2);
  font-size: var(--fs-xs, 11px);
}

.git-recent-summary {
  cursor: pointer;
  color: var(--fg-muted);
  font-weight: 500;
}

.git-recent-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 4px;
}

.git-commit-row {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 2px 4px;
  border-radius: var(--r-xs);
}

.git-commit-sha {
  color: var(--fg-muted);
  font-family: var(--font-mono, monospace);
}

.git-commit-subj {
  flex: 1;
  color: var(--fg);
}

.git-discard-dialog {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.git-discard-list {
  max-height: 160px;
  overflow-y: auto;
  margin: 0;
  padding-left: 20px;
  font-family: var(--font-mono, monospace);
  font-size: var(--fs-xs, 11px);
  color: var(--fg-muted);
}

/* ---------- Diff View (Continuous Multi-File) ---------- */
.view.diff {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  overflow: hidden;
  background: var(--bg-0);
}

.diff-toolbar {
  container-type: inline-size;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 38px;
  min-height: 38px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-chrome);
  padding: 0 var(--sp-4);
  font-size: var(--fs-xs, 11px);
  gap: var(--sp-4);
}

.diff-toolbar-left {
  display: flex;
  flex: 1 1 0;
  min-width: 0;
  align-items: center;
  gap: var(--sp-4);
  color: var(--fg-muted);
  overflow: hidden;
}

.diff-toolbar-info { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* The buttons keep their size; the info on the left gives way first. Past that the buttons
   scroll sideways, and the close button stays in view. */
.diff-toolbar-right {
  display: flex;
  flex: 0 1 auto;
  min-width: 0;
  overflow-x: auto;
  align-items: center;
  gap: var(--sp-2);
}
.diff-toolbar-right > *, .diff-close-btn { flex: none; }

/* A narrow toolbar: Checks and Explain keep their icon, Whitespace becomes ¶ (names and tooltips stay). */
.diff-toolbar .lbl-short { display: none; }
@container (max-width: 600px) {
  .diff-toolbar-right .lbl { display: none; }
}
@container (max-width: 420px) {
  .diff-toolbar-right .lbl-ws { display: none; }
  .diff-toolbar-right .lbl-short { display: inline; }
}
.diff-ws-btn[aria-pressed="true"] { background: color-mix(in srgb, var(--bg-2) 100%, var(--fg) 14%); font-weight: 600; }

/* Segmented control: one row, the chosen option shows pressed. */
.btn-group { display: inline-flex; flex: none; }
.btn-group > .btn { border-radius: 0; }
.btn-group > .btn:first-child { border-radius: var(--r-sm) 0 0 var(--r-sm); }
.btn-group > .btn:last-child { border-radius: 0 var(--r-sm) var(--r-sm) 0; }
.btn-group > .btn + .btn { margin-left: -1px; }
.btn-group > .btn.active, .btn-group > .btn[aria-pressed="true"] { position: relative; z-index: 1; background: color-mix(in srgb, var(--bg-2) 100%, var(--fg) 14%); color: var(--fg); font-weight: 600; }

.diff-scroller {
  flex: 1;
  overflow-y: auto;
  overflow-x: auto;
  position: relative;
  outline: none;
}

.diff-sizer {
  position: relative;
  width: 100%;
  min-width: 100%;
}

/* One pooled box per visible item: the list positions the box, the item fills it from the top. */
.diff-item {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
}

/* ---------- Sticky File Headers ---------- */
.diff-file-header {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 38px;
  display: flex;
  align-items: center;
  padding: 0 var(--sp-4);
  background: var(--bg-chrome);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  gap: var(--sp-4);
  font-size: var(--fs-sm, 12px);
  z-index: 2;
  box-sizing: border-box;
}

.diff-status-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: var(--r-xs);
}

.diff-file-path {
  font-weight: 600;
  color: var(--fg);
  flex: 1;
  font-family: var(--font-mono, monospace);
}

.diff-file-stats {
  display: inline-flex;
  gap: var(--sp-2);
  font-size: var(--fs-xs, 11px);
}

.diff-add-stat {
  color: var(--ok);
}

.diff-del-stat {
  color: var(--danger);
}

.diff-file-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.diff-viewed-label {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: var(--fs-xs, 11px);
  color: var(--fg-muted);
  cursor: pointer;
  user-select: none;
}

/* ---------- Hunk Separators ---------- */
.diff-hunk-sep {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-4);
  background: var(--diff-hunk-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  color: var(--fg-muted);
  box-sizing: border-box;
}

.diff-hunk-actions {
  display: inline-flex;
  gap: 2px;
}

/* ---------- Diff Rows (Split & Unified) ---------- */
.diff-row {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 20px;
  font-family: var(--font-mono, monospace);
  font-size: var(--code-fs);
  line-height: 20px;
  box-sizing: border-box;
}

/* Split layout: paired rows in one DOM row */
.diff-row.split {
  display: flex;
  width: 100%;
}

.diff-cell {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: stretch;
  overflow: hidden;
  white-space: pre;
}

.diff-cell.old {
  border-right: 1px solid var(--border);
}

.diff-cell.del {
  background: var(--diff-del-bg);
}

.diff-cell.add {
  background: var(--diff-add-bg);
}

.diff-cell.empty {
  background: color-mix(in srgb, var(--fg) 2%, transparent);
}

.diff-cell .diff-ln {
  width: 48px;
  min-width: 48px;
  text-align: right;
  padding-right: 8px;
  color: var(--fg-faint);
  user-select: none;
  border-right: 1px solid var(--border);
}

.diff-cell .diff-sign {
  width: 18px;
  min-width: 18px;
  text-align: center;
  user-select: none;
  font-weight: 600;
}

.diff-cell.del .diff-sign { color: var(--danger); }
.diff-cell.add .diff-sign { color: var(--ok); }

.diff-cell .diff-code {
  flex: 1;
  padding-left: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- Review mode: gutter "+" and inline annotations (FRONTEND.md § 6.13) ---------- */
.diff-cell {
  position: relative;
}

.diff-comment-add-btn {
  position: absolute;
  left: 2px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  padding: 0;
  border: none;
  border-radius: 3px;
  background: var(--accent);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}

.diff-cell:hover .diff-comment-add-btn,
.diff-row.unified:hover .diff-comment-add-btn {
  opacity: 1;
}

.diff-comment-add-btn[hidden] {
  display: none;
}

.diff-row.unified .diff-comment-add-btn {
  left: 46px;
}

.diff-annotation-slot {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  padding: var(--sp-2, 8px) var(--sp-3, 12px);
  background: color-mix(in srgb, var(--fg) 3%, transparent);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Unified layout */
.diff-row.unified {
  display: flex;
  align-items: stretch;
  width: 100%;
  white-space: pre;
}

.diff-row.unified.del { background: var(--diff-del-bg); }
.diff-row.unified.add { background: var(--diff-add-bg); }

.diff-row.unified .diff-ln-old,
.diff-row.unified .diff-ln-new {
  width: 44px;
  min-width: 44px;
  text-align: right;
  padding-right: 6px;
  color: var(--fg-faint);
  user-select: none;
  border-right: 1px solid var(--border);
}

.diff-row.unified .diff-sign {
  width: 18px;
  min-width: 18px;
  text-align: center;
  user-select: none;
  font-weight: 600;
}

.diff-row.unified.del .diff-sign { color: var(--danger); }
.diff-row.unified.add .diff-sign { color: var(--ok); }

.diff-row.unified .diff-code {
  flex: 1;
  padding-left: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Intraline range styling */
::highlight(ferro-diff-add) {
  background-color: var(--diff-add-word-bg);
}

::highlight(ferro-diff-del) {
  background-color: var(--diff-del-word-bg);
}

/* ---------- Banners (Too Large & Binary) ---------- */
.diff-banner {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  font-size: var(--fs-sm, 12px);
  color: var(--fg-muted);
  box-sizing: border-box;
}

/* ---------- Image Diffs (Side-by-side, Swipe, Onion-skin) ---------- */
.diff-image-view {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 360px;
  display: flex;
  flex-direction: column;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  box-sizing: border-box;
}

.diff-image-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-bottom: 1px solid var(--border);
}

.diff-image-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  padding: 12px;
}

.diff-img-side {
  display: flex;
  gap: 16px;
  max-height: 100%;
}

.diff-img-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.diff-img-label {
  font-size: 11px;
  color: var(--fg-muted);
}

.diff-img-col img {
  max-height: 250px;
  max-width: 100%;
  object-fit: contain;
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  background: var(--bg-0);
}

.diff-img-swipe-container,
.diff-img-onion-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 260px;
  width: 400px;
}

.diff-img-swipe-before,
.diff-img-onion-before {
  position: absolute;
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
}

.diff-img-swipe-after {
  position: absolute;
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  clip-path: inset(0 0 0 var(--swipe-pct, 50%));
}

.diff-img-onion-after {
  position: absolute;
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
}

.diff-img-swipe-slider,
.diff-img-onion-slider {
  position: absolute;
  bottom: 0;
  width: 80%;
  z-index: 5;
}

/* ---------- Gutter Markers in Code Viewer ---------- */
.cv-ln.gutter-add {
  border-left: 3px solid var(--ok);
  padding-left: 1px;
  cursor: pointer;
}

.cv-ln.gutter-mod {
  border-left: 3px solid var(--warn);
  padding-left: 1px;
  cursor: pointer;
}

.cv-ln.gutter-del {
  border-left: 3px solid var(--danger);
  padding-left: 1px;
  cursor: pointer;
}

/* ---------- Mini-Diff Inline Card ---------- */
.mini-diff-card {
  display: flex;
  flex-direction: column;
  margin: 4px 12px 4px 60px;
  background: var(--bg-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  z-index: 15;
  font-family: var(--font-mono, monospace);
  font-size: var(--fs-sm);
}

.mini-diff-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 8px;
  background: var(--bg-chrome);
  border-bottom: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 11px;
}

.mini-diff-rows {
  display: flex;
  flex-direction: column;
  max-height: 180px;
  overflow-y: auto;
}

.mini-diff-row {
  display: flex;
  align-items: center;
  line-height: 18px;
  padding: 1px 6px;
  white-space: pre;
}

.mini-diff-row.del {
  background: var(--diff-del-bg);
}

.mini-diff-row.add {
  background: var(--diff-add-bg);
}

.mini-diff-sign {
  width: 16px;
  font-weight: 600;
  user-select: none;
}

.mini-diff-row.del .mini-diff-sign { color: var(--danger); }
.mini-diff-row.add .mini-diff-sign { color: var(--ok); }

.mini-diff-code {
  flex: 1;
}

/* agent edit review (F4b): summary strip and per-hunk revert */
.diff-banner-slot { flex: none; border-bottom: 1px solid var(--border); }
.agent-bar { display: flex; align-items: center; gap: var(--sp-4); padding: var(--sp-3) var(--sp-5); background: var(--bg-1); font-size: var(--fs-sm); }
.agent-bar > .i { color: var(--fg-muted); flex: none; }
.agent-bar-title { color: var(--fg); font-weight: 600; }
.agent-bar-sp { flex: 1; }
.diff-hunk-action-btn[hidden] { display: none; }

/* ---------- AI change notes (explain.js) ---------- */
.diff-note {
  position: absolute; left: 0; right: 0; top: 0; height: 26px;
  display: flex; align-items: center; gap: 8px;
  padding: 0 var(--sp-4);
  font-size: var(--fs-sm); color: var(--fg);
  background: color-mix(in srgb, var(--info) 6%, var(--bg-0));
  border-bottom: 1px solid var(--border);
  box-sizing: border-box; overflow: hidden;
}
.diff-note.file-note { height: 28px; background: color-mix(in srgb, var(--info) 9%, var(--bg-0)); }
.diff-note-text { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.diff-note-kind { flex: none; font-size: var(--fs-xs); font-weight: 600; line-height: 16px; padding: 0 6px; border-radius: 8px; border: 1px solid currentColor; }
.diff-note-kind.added { color: var(--ok); }
.diff-note-kind.removed { color: var(--danger); }
.diff-note-kind.changed { color: var(--info); }
.diff-note-kind.summary { color: var(--fg-muted); border-color: var(--border-strong); }
.diff-note-verdict { flex: none; font: 600 var(--fs-xs)/16px var(--font-ui); padding: 0 6px; border-radius: 8px; border: 1px solid currentColor; background: none; cursor: pointer; }
.diff-note-verdict.improve { color: var(--warn); }
.diff-note-verdict.problem { color: var(--danger); }
.diff-note.has-more { cursor: pointer; }
.diff-note.has-more:hover { background: color-mix(in srgb, var(--fg) 5%, var(--bg-0)); }
.hunk-review p { margin: 0 0 8px; }
.hunk-review-diff { margin: 8px 0 0; padding: 8px 0; max-height: 50vh; overflow: auto; font: var(--code-fs)/var(--code-lh) var(--font-mono); background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--r-md); }
.hunk-review-diff div { padding: 0 10px; white-space: pre; }
.hunk-review-diff .hr-del { background: color-mix(in srgb, var(--danger) 14%, transparent); }
.hunk-review-diff .hr-add { background: color-mix(in srgb, var(--ok) 14%, transparent); }

/* ---------- coverage of added lines (Checks → Coverage → In diff) ---------- */
.diff-cell.cov-miss .diff-ln, .diff-row.unified.cov-miss .diff-ln-new { box-shadow: inset 3px 0 0 var(--danger); color: var(--danger); }
.diff-cell.cov-hit .diff-ln, .diff-row.unified.cov-hit .diff-ln-new { box-shadow: inset 3px 0 0 var(--ok); }