Overleaf/services/web/frontend/stylesheets/pages/editor/tabs.scss

:root {
  --editor-tab-max-path-length: 250px;
  --editor-tab-divider-color: var(--neutral-70);
  --editor-tab-row-height: var(--review-panel-header-height, 36px);
  --editor-tab-drop-indicator-width: 5px;
  --editor-tab-divider-width: 1px;
}

@include theme('light') {
  --editor-tab-divider-color: var(--border-divider);
}

.editor-tabs-container {
  display: flex;
  flex-direction: row;
  align-items: center;
  flex: 0 0 auto;
  min-height: var(--editor-tab-row-height);
  background: var(--bg-secondary-themed);
  justify-content: space-between;

  .review-panel-header-slot {
    display: contents;
  }

  .editor-tabs-labs-icon {
    flex: 0 0 auto;
    padding: 0 var(--spacing-02);

    .material-symbols {
      font-size: 16px;
    }
  }
}

.editor-tabs-row {
  display: flex;
  flex-direction: row;
  height: var(--editor-tab-row-height);
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
  background: var(--bg-secondary-themed);
  overflow-x: auto;
  scrollbar-width: thin;
}

.editor-file-tab {
  --tab-bg-color: var(--bg-secondary-themed);
  --tab-text-color: var(--content-secondary-themed);

  display: flex;
  position: relative;
  border-right: var(--editor-tab-divider-width) solid
    var(--editor-tab-divider-color);
  padding: var(--spacing-01) var(--spacing-02) 0 var(--spacing-02);

  &:first-child {
    padding-left: 0;
  }

  &:last-child {
    padding-right: 0;
  }

  &.tab-selected,
  &:has(+ .tab-selected) {
    border-right-color: transparent;
  }

  .editor-file-tab-content {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-02);
    justify-content: center;
    box-sizing: border-box;
    padding: var(--spacing-02) var(--spacing-03);
    background: var(--tab-bg-color);
    color: var(--tab-text-color);
    font-size: var(--font-size-02);
    flex-direction: row;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-bottom-width: 0;
  }

  &.tab-selected {
    --tab-bg-color: var(--bg-primary-themed);
    --tab-text-color: var(--content-primary-themed);

    .editor-file-tab-content {
      border-top-left-radius: var(--border-radius-medium);
      border-top-right-radius: var(--border-radius-medium);
      border-color: var(--editor-tab-divider-color);
    }
  }

  &:not(.tab-selected) .editor-file-tab-content:hover {
    background-color: var(--bg-tertiary-themed);
    border-radius: var(--border-radius-medium);
  }

  .material-symbols {
    vertical-align: middle;
    font-size: var(--font-size-03);
  }

  .file-tree-icon,
  .linked-file-highlight {
    color: var(--tab-text-color);
  }

  .editor-file-tab-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
  }

  .file-tree-icon {
    margin-right: var(--spacing-01);
  }

  .linked-file-icon {
    position: relative;
    left: -2px;
  }

  .linked-file-highlight {
    position: absolute;
    top: 6px;
    left: 6px !important;
    font-size: var(--font-size-01);
  }

  &.tab-drop-left::after,
  &.tab-drop-right::after,
  .editor-tabs-row-hovered &:last-child::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: var(--editor-tab-drop-indicator-width);
    background-color: var(--border-primary-themed);
  }

  &.tab-drop-right::after,
  .editor-tabs-row-hovered &:last-child::after {
    right: calc(
      var(--editor-tab-drop-indicator-width) /
        -2 - var(--editor-tab-divider-width)
    );
  }

  &.tab-drop-left::after {
    left: calc(var(--editor-tab-drop-indicator-width) / -2);
  }

  &.tab-temporary {
    font-style: italic;
  }

  .editor-file-tab-action {
    display: flex;
    align-items: center;
  }

  .editor-file-tab-close-action {
    background: transparent;
    opacity: 0;
    border: none;
    color: var(--tab-text-color);
    cursor: pointer;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;

    &:hover {
      color: var(--content-primary-themed);
    }
  }

  &:hover,
  &:focus-within,
  &.tab-selected {
    .editor-file-tab-close-action {
      opacity: 1;
    }
  }
}

.editor-file-tab-path {
  text-wrap: nowrap;
  max-width: var(--editor-tab-max-path-length);
  text-overflow: ellipsis;
  white-space: nowrap;
  direction: rtl;
  overflow: hidden;
}