.diff-modal {
  position: fixed; inset: 0; z-index: 1400;
  display: flex; align-items: center; justify-content: center;
  padding: 20px; opacity: 0; pointer-events: none;
  transition: opacity 0.28s var(--ease);
}
.diff-modal.open { opacity: 1; pointer-events: all; }

.diff-panel {
  position: relative; z-index: 1;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 2px;
  width: min(980px, 100%);
  height: min(720px, 88svh);
  display: flex; flex-direction: column;
  box-shadow: 0 28px 70px var(--shadow-panel);
  transform: translateY(12px); transition: transform 0.32s var(--ease);
  overflow: hidden;
}
.diff-modal.open .diff-panel { transform: translateY(0); }

/* Header */
.diff-header {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 14px 18px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.diff-header-info { flex: 1; min-width: 0; }
.diff-header-top { display: flex; align-items: center; gap: 7px; margin-bottom: 3px; }
.diff-sha-badge {
  font-family: 'Geist Mono', monospace; font-size: 0.69rem;
  background: var(--surface2); border: 1px solid var(--border);
  padding: 2px 7px; border-radius: 2px; color: var(--red); flex-shrink: 0;
}
.diff-commit-msg {
  font-size: 0.9rem; font-weight: 500; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.diff-commit-meta { font-family: 'Geist Mono', monospace; font-size: 0.72rem; color: var(--text-dim); }

/* ── Desktop layout: sidebar + main ── */
.diff-content {
  flex: 1; display: flex; overflow: hidden; min-height: 0;
}

.diff-sidebar {
  flex: 0 0 220px;
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
  background: var(--surface2);
}
[data-theme="dark"] .diff-sidebar { background: var(--bg); }

.diff-sidebar-header {
  padding: 10px 14px 8px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.diff-sidebar-stats {
  display: flex; align-items: center; gap: 8px;
  font-family: 'Geist Mono', monospace; font-size: 0.7rem; flex-wrap: wrap;
}
.diff-stat-add { color: var(--diff-add-text); }
.diff-stat-del { color: var(--diff-del-text); }
.diff-stat-files { color: var(--text-dim); }

.diff-sidebar-files {
  flex: 1; overflow-y: auto;
  padding: 6px 0;
}

.diff-sidebar-item {
  display: flex; align-items: center; gap: 7px;
  padding: 7px 14px;
  cursor: pointer;
  font-family: 'Geist Mono', monospace; font-size: 0.72rem;
  color: var(--text-sub);
  border-left: 2px solid transparent;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
  min-width: 0;
}
.diff-sidebar-item:hover { background: var(--surface); color: var(--text); }
.diff-sidebar-item.active { border-left-color: var(--red); color: var(--red); background: var(--surface); }

.diff-sidebar-name {
  flex: 1; min-width: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.diff-sidebar-adds { color: var(--diff-add-text); flex-shrink: 0; }
.diff-sidebar-dels { color: var(--diff-del-text); flex-shrink: 0; }

.diff-main { flex: 1; overflow-y: auto; min-width: 0; }

/* Badges */
.diff-badge {
  font-family: 'Geist Mono', monospace; font-size: 0.6rem;
  padding: 1px 5px; border-radius: 2px; flex-shrink: 0;
}
.diff-badge-new { background: var(--diff-add-bg); color: var(--diff-add-text); }
.diff-badge-del { background: var(--diff-del-bg); color: var(--diff-del-text); }

/* File diffs */
.diff-files { padding: 8px 0; }
.diff-file { margin-bottom: 14px; }
.diff-file-header {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 16px; background: var(--surface2);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 1;
  font-family: 'Geist Mono', monospace; font-size: 0.73rem;
}

.diff-expand-btn {
  margin-left: auto;
  padding: 2px 8px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-dim);
  font-family: 'Geist Mono', monospace;
  font-size: 0.65rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s;
}
.diff-expand-btn:hover { color: var(--red); border-color: var(--red); }
.diff-file-name { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--text-sub); }
.diff-file-counts { display: flex; gap: 6px; flex-shrink: 0; }
.diff-mini-bar { display: inline-flex; width: 36px; height: 3px; overflow: hidden; flex-shrink: 0; }
.diff-mini-add { background: var(--diff-add-text); }
.diff-mini-del { background: var(--diff-del-text); }

.diff-table-wrap { overflow-x: auto; }
.diff-table { width: 100%; border-collapse: collapse; }
.diff-table td { padding: 1px 0; vertical-align: top; }
.diff-gutter-sign {
  font-family: 'Geist Mono', monospace; font-size: 0.73rem;
  width: 20px; padding: 0 6px; user-select: none; opacity: 0.45;
  text-align: center; flex-shrink: 0;
}
.diff-line-code pre {
  font-family: 'Geist Mono', monospace; font-size: 0.73rem;
  line-height: 1.5; white-space: pre; margin: 0; color: var(--text);
}
tr.diff-add { background: var(--diff-add-bg); }
tr.diff-add .diff-line-code pre { color: var(--diff-add-text); }
tr.diff-del { background: var(--diff-del-bg); }
tr.diff-del .diff-line-code pre { color: var(--diff-del-text); }
tr.diff-hunk-row { background: var(--diff-hunk-bg); }
.diff-hunk-cell { padding: 3px 14px; font-family: 'Geist Mono', monospace; font-size: 0.71rem; color: var(--red); }
.diff-hunk-ctx { color: var(--text-dim); margin-left: 6px; font-style: italic; }
tr.diff-ctx .diff-line-code pre { color: var(--text-sub); }

.diff-loading, .diff-empty {
  padding: 32px 18px; color: var(--text-dim);
  font-family: 'Geist Mono', monospace; font-size: 0.8rem;
  display: flex; flex-direction: column; gap: 8px;
}
.diff-empty { flex-direction: row; align-items: center; }

/* ── Mobile: hide sidebar, show sticky dropdown ── */
.diff-mobile-bar {
  display: none;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
  flex-shrink: 0;
  position: sticky; top: 0; z-index: 10;
}
[data-theme="dark"] .diff-mobile-bar { background: var(--bg); }

.diff-mobile-stats {
  display: flex; align-items: center; gap: 8px;
  font-family: 'Geist Mono', monospace; font-size: 0.7rem;
  margin-bottom: 6px;
}

/* Custom file dropdown */
.diff-file-dropdown {
  position: relative;
  width: 100%;
}

.diff-dropdown-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Geist Mono', monospace;
  font-size: 0.75rem;
  padding: 7px 10px;
  border-radius: 2px;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s;
}

.diff-dropdown-trigger:hover,
.diff-dropdown-trigger[aria-expanded="true"] {
  border-color: var(--text-dim);
}

.diff-dropdown-trigger svg {
  flex-shrink: 0;
  color: var(--text-dim);
  transition: transform 0.2s;
}

.diff-dropdown-trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.diff-dropdown-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.diff-dropdown-list {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  box-shadow: 0 8px 24px var(--shadow-float);
  z-index: 100;
  max-height: 200px;
  overflow-y: auto;
}

.diff-dropdown-list.open { display: block; }

.diff-dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.12s;
}

.diff-dropdown-item:last-child { border-bottom: none; }
.diff-dropdown-item:hover { background: var(--surface2); }

.diff-dropdown-item-name {
  font-family: 'Geist Mono', monospace;
  font-size: 0.74rem;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.diff-dropdown-item-counts {
  display: flex;
  gap: 6px;
  font-family: 'Geist Mono', monospace;
  font-size: 0.7rem;
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .diff-modal { padding: 0; align-items: flex-end; }
  .diff-panel { border-radius: 0; width: 100%; height: 92svh; }
  .diff-sidebar { display: none; }
  .diff-mobile-bar { display: block; }
  .diff-main { overflow-y: auto; }
}