overleaf/services/web/frontend/stylesheets/bootstrap-5/pages/editor/toolbar.scss

:root {
  --toolbar-border-color: var(--neutral-80);
  --toolbar-header-bg-color: var(--neutral-90);
  --toolbar-header-btn-border-color: var(--neutral-80);
  --toolbar-btn-color: var(--white);
  --toolbar-btn-hover-bg-color: var(--neutral-80);
  --project-name-color: var(--neutral-40);
  --project-rename-link-color: var(--neutral-40);
  --project-rename-link-color-hover: var(--neutral-20);
  --editor-header-logo-background: url(../../../../../public/img/ol-brand/overleaf-o-white.svg)
    center / contain no-repeat;
}

@include theme('light') {
  --toolbar-border-color: var(--neutral-20);
  --toolbar-header-bg-color: var(--white);
  --toolbar-header-btn-border-color: var(--neutral-20);
  --toolbar-btn-color: var(--neutral-70);
  --toolbar-btn-hover-bg-color: var(--neutral-10);
  --project-name-color: var(--neutral-70);
  --project-rename-link-color: var(--neutral-70);
  --project-rename-link-color-hover: var(--neutral-70);
  --editor-header-logo-background: url(../../../../../public/img/ol-brand/overleaf-o.svg)
    center / contain no-repeat;
}

.toolbar {
  --toolbar-height: 40px;

  display: flex;
  align-items: stretch;
  height: var(--toolbar-height);
  min-height: var(--toolbar-height);
  border-bottom: 1px solid var(--toolbar-border-color);

  button {
    position: relative;

    .badge {
      position: absolute;
      top: 0;
      right: 0;
      pointer-events: none; // Labels were capturing button/anchor clicks.

      .badge-content {
        padding: 0;
      }
    }
  }

  .toolbar-right,
  .toolbar-left {
    button:not(.back-to-editor-btn) {
      background: transparent;
      box-shadow: none;
    }
  }

  .toolbar-right .back-to-editor-btn {
    margin-right: var(--spacing-09);
  }

  a.btn-full-height,
  button.btn-full-height {
    border: none;
    border-radius: 0;
    border-right: 1px solid var(--toolbar-header-btn-border-color);
    color: var(--toolbar-btn-color);
    padding: var(--spacing-02) var(--spacing-05) var(--spacing-03);
    font-size: var(--font-size-05);
    max-height: 39px;

    &:hover {
      text-shadow: none;
      background-color: var(--toolbar-btn-hover-bg-color);
      color: var(--toolbar-btn-color);
    }

    &.active,
    &:active {
      color: var(--white);
      background-color: $bg-accent-01;
      box-shadow: none;
    }

    .badge {
      top: var(--spacing-01);
      right: var(--spacing-02);
    }

    &.header-cobranding-logo-container {
      height: calc(var(--toolbar-height) - 1px);
      padding: var(--spacing-04) var(--spacing-05);
    }

    .spinner-border {
      vertical-align: middle;
      font-size: var(--font-size-02);
    }

    &.dropdown-toggle {
      line-height: 1;

      &::after {
        vertical-align: middle;
        font-size: var(--font-size-02);
      }
    }
  }

  .toolbar-left {
    display: flex;
    align-items: stretch;
    float: left;
    text-align: center;
  }

  .toolbar-right {
    display: flex;
    align-items: stretch;
    flex-grow: 1;
    justify-content: flex-end;

    a.btn-full-height,
    button.btn-full-height {
      border-right: 0;
      border-left: 1px solid var(--toolbar-header-btn-border-color);
    }
  }

  .toolbar-center {
    text-align: center;
    text-overflow: ellipsis;
    overflow: hidden;

    // At small screen sizes, center relative to the left menu and right buttons
    width: 100%;
    display: flex;
    justify-content: center;
  }

  &.toolbar-header {
    background-color: var(--toolbar-header-bg-color);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1;
  }

  .toolbar-item {
    display: flex;
  }
}

.header-cobranding-logo {
  display: block;
  width: auto;
  max-height: 100%;
}

.toolbar-label {
  display: none;
  margin: 0 var(--spacing-02);
  font-size: var(--font-size-02);
  font-weight: 600;
  vertical-align: middle;
  text-align: left;

  @include media-breakpoint-up(lg) {
    display: inline-block;
  }

  &.toolbar-label-multiline {
    line-height: 1.1;
  }
}

.toolbar-header-upgrade-prompt {
  margin-left: var(--spacing-05);

  @include media-breakpoint-down(lg) {
    display: none !important;
  }
}

.editor-menu-icon {
  &.material-symbols {
    width: 1em;
    text-indent: -9999px;
    background: var(--editor-header-logo-background);
  }
}

.project-name {
  .name {
    display: inline-block;

    @include text-truncate;

    padding: var(--spacing-03);
    vertical-align: top;
    color: var(--project-name-color);
    font-weight: 700;
  }

  input {
    height: 30px;
    margin-top: var(--spacing-02);
    padding: var(--spacing-03);
    max-width: 500px;
    text-align: center;
    font-weight: 700;
  }

  a.rename {
    visibility: hidden;
    display: inline-block;
    color: var(--project-rename-link-color);
    padding: var(--spacing-03);
    border-radius: var(--border-radius-base);
    cursor: pointer;

    &:hover {
      text-shadow: 0 1px 0 rgb(0 0 0 / 25%);
      color: var(--project-rename-link-color-hover);
      text-decoration: none;
    }
  }

  &:hover {
    a.rename {
      visibility: visible;
    }
  }
}