.source-workspace {
  display: grid;
  grid-template-columns: minmax(210px, 270px) minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
}

.source-workspace.project-outline-collapsed {
  grid-template-columns: 48px minmax(0, 1fr);
}

.project-outline {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.project-outline .pane-title {
  min-height: 42px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.outline-title-copy {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--text);
  white-space: nowrap;
}

.outline-actions {
  display: inline-flex;
  gap: 4px;
  margin-left: auto;
}

button.outline-action {
  min-height: 25px;
  padding: 3px 6px;
  border-radius: 6px;
  background: var(--soft);
  color: var(--text);
  font-size: 9px;
  font-weight: 750;
}

button.outline-toggle {
  min-width: 25px;
  font-size: 13px;
  line-height: 1;
}

.source-workspace.project-outline-collapsed .project-outline .pane-title {
  justify-content: center;
  padding-inline: 5px;
}
.source-workspace.project-outline-collapsed .outline-title-copy,
.source-workspace.project-outline-collapsed #projectOutlineStatus,
.source-workspace.project-outline-collapsed .project-outline-tree,
.source-workspace.project-outline-collapsed .outline-actions > .outline-action:not(.outline-toggle) {
  display: none;
}
.source-workspace.project-outline-collapsed .outline-actions {
  margin-left: 0;
}

#projectOutlineStatus {
  overflow: hidden;
  max-width: 150px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#projectOutlineStatus[data-state="invalid"] {
  font-style: italic;
}

.project-outline-tree {
  flex: 1;
  min-height: 360px;
  max-height: clamp(402px, 42vh, 602px);
  overflow: auto;
  padding: 9px;
  background: var(--surface-subtle);
}

.outline-file-section {
  padding: 3px;
  border: 1px solid transparent;
  border-radius: 10px;
}

.outline-file-section + .outline-file-section {
  margin-top: 7px;
}

.outline-file-section.active {
  border-color: color-mix(in srgb, var(--text) 18%, transparent);
  background: color-mix(in srgb, var(--soft) 72%, transparent);
}

.outline-file-section.invalid {
  border-style: dashed;
}

.outline-file-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 4px;
}

button.outline-file {
  width: 100%;
  min-width: 0;
  min-height: 34px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  padding: 7px 8px;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font-size: 11px;
  text-align: left;
}

button.outline-file:hover,
button.outline-file:focus-visible {
  background: var(--soft);
}

button.outline-file > span:first-child {
  color: var(--muted);
  font-size: 8px;
}

button.outline-file strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.outline-file-state {
  color: var(--muted);
  font-size: 8px;
  font-weight: 700;
  text-transform: uppercase;
}

button.outline-file-remove {
  width: 26px;
  min-width: 26px;
  height: 26px;
  padding: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  line-height: 1;
}

button.outline-file-remove:hover,
button.outline-file-remove:focus-visible {
  background: var(--soft);
  color: var(--text);
}

.outline-group {
  margin-left: 13px;
}

.outline-group + .outline-group {
  margin-top: 5px;
}

.outline-group-title {
  padding: 5px 8px 4px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .055em;
  text-transform: uppercase;
}

.outline-items {
  display: grid;
  gap: 2px;
}

button.outline-item {
  width: 100%;
  min-height: 33px;
  padding: 5px 8px 5px 12px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font-size: 11px;
  font-weight: 650;
  text-align: left;
}

button.outline-item:hover,
button.outline-item:focus-visible {
  background: var(--soft);
  opacity: 1;
}

button.outline-item:focus-visible,
button.outline-file:focus-visible,
button.outline-file-remove:focus-visible,
button.outline-action:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--text) 32%, transparent);
  outline-offset: 1px;
}

.outline-item-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.outline-item-meta {
  max-width: 74px;
  overflow: hidden;
  color: var(--muted);
  font-size: 9px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.outline-empty {
  margin: 6px 8px 8px 21px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.45;
}

.editor-tabs {
  display: flex;
  gap: 2px;
  min-height: 32px;
  padding: 4px 8px 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
  background: var(--surface-subtle);
  scrollbar-width: thin;
}

.editor-tab {
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  background: transparent;
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  white-space: nowrap;
}

.editor-tab[aria-selected="true"] {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.editor-tab:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--text) 32%, transparent);
  outline-offset: 1px;
}

.editor-tab-entry {
  padding: 1px 5px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 9px;
  font-weight: 750;
  letter-spacing: .04em;
  text-transform: uppercase;
}

@media (max-width: 760px) {
  .source-workspace,
  .source-workspace.project-outline-collapsed {
    grid-template-columns: minmax(0, 1fr);
  }

  .project-outline-tree {
    min-height: 0;
    max-height: 230px;
  }

  .project-outline .pane-title {
    flex-wrap: wrap;
  }

  #projectOutlineStatus {
    order: 3;
    width: 100%;
    max-width: none;
  }

  .source-workspace.project-outline-collapsed .project-outline {
    max-height: 42px;
  }
  .source-workspace.project-outline-collapsed .project-outline .pane-title {
    justify-content: flex-end;
  }
}