.changes-diff-modal {
  /* Diff comparisons read better wide — default to a generous portion of
     the viewport. The grip-resize remembers the user's chosen dimensions
     across sessions via useModalResizePersist. */
  min-width: 720px;
  min-height: 420px;
  max-width: calc(100vw - 40px);
  max-height: calc(100dvh - 40px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  resize: both;
}

.changes-diff-modal:not([style*="width"]) {
  width: min(95vw, 2200px);
}
.changes-diff-modal:not([style*="height"]) {
  height: min(90vh, calc(100dvh - 40px));
}

.changes-diff-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.changes-diff-modal-header .modal-close {
  position: static;
}

.changes-diff-header-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 15px;
  font-weight: 600;
}

.changes-diff-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.changes-diff-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.changes-diff-sidebar {
  width: 280px;
  min-width: 280px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
}

.changes-diff-file-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm) 0;
}

.changes-diff-file-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: none;
  border-left: 3px solid transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  font-size: 12px;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.changes-diff-file-item:hover {
  background: var(--card-hover);
}

.changes-diff-file-item.selected {
  background: var(--card-hover);
  border-left-color: var(--todo);
}

.changes-diff-file-path {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  direction: rtl;
  text-overflow: ellipsis;
  font-family: var(--font-mono);
  font-size: 12px;
}

.changes-diff-file-stat {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: calc(var(--space-sm) + var(--space-xs) * 0.75);
  color: var(--text-muted);
}

.changes-diff-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  min-height: 0;
}

.changes-diff-file-header-bar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  min-height: 40px;
}

.changes-diff-file-header-name {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.changes-diff-file-header-stats {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.changes-diff-viewer {
  flex: 1;
  overflow: auto;
  padding: var(--space-sm) 0;
}

.changes-diff-viewer .changes-diff-patch {
  border: none;
  border-radius: 0;
}

.changes-diff-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex: 1;
  color: var(--text-muted);
  padding: var(--space-xl);
  text-align: center;
}

.changes-diff-empty p {
  margin: 0;
  font-size: 14px;
}

@media (max-width: 768px) {
  .changes-diff-modal {
    /* Reset the desktop min-width: 720px / min-height: 420px — they pin the
       modal wider/taller than narrow phone viewports and can push the sheet
       off-screen. The fullscreen width/height below then take effect normally.
       !important is required because persisted desktop sizes can be restored
       as inline width/height styles and would otherwise win on mobile. */
    min-width: 0 !important;
    min-height: 0 !important;
    width: 100% !important;
    width: 100vw !important;
    height: 100vh !important;
    height: 100dvh !important;
    max-width: 100vw !important;
    max-height: 100vh;
    max-height: 100dvh !important;
    margin: 0;
    border-radius: 0;
    border: none;
    /* Disable user resize on mobile — fullscreen layout. */
    resize: none;
  }

  .changes-diff-modal-header {
    flex-wrap: wrap;
    align-items: flex-start;
    overflow: hidden;
  }

  .changes-diff-header-title {
    flex: 1;
    min-width: 0;
  }

  .changes-diff-header-actions {
    flex: 1 1 100%;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: var(--space-xs);
  }

  .changes-diff-body {
    flex-direction: column;
  }

  .changes-diff-sidebar {
    width: 100%;
    min-width: unset;
    max-height: 40%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .changes-diff-file-list {
    padding: var(--space-xs) 0;
  }

  .changes-diff-file-item {
    min-height: 36px;
  }

  .changes-diff-content {
    overflow-x: auto;
  }
}