Overleaf/services/web/frontend/stylesheets/components/accordion.scss

.ol-accordions-container .custom-accordion-item:last-of-type {
  border: 0 !important;
}

.ol-accordions-container {
  .custom-accordion-item {
    width: 100%;
    padding-top: var(--spacing-08);
    padding-bottom: var(--spacing-09);
    border-bottom: 1px solid var(--border-divider);

    .custom-accordion-header {
      text-align: left;
      width: 100%;
      font-size: var(--font-size-04);
      font-weight: 600;
      line-height: var(--line-height-03);
      color: var(--content-primary);
      background-color: unset;
      border: unset;
      display: flex;
      justify-content: space-between;
      padding: unset;

      .custom-accordion-icon {
        display: flex;
        align-items: center;
        transition: transform 0.35s ease;
        margin-left: var(--spacing-08);

        .material-symbols {
          font-size: var(--font-size-06);
        }
      }

      &:not(.collapsed) {
        .custom-accordion-icon {
          transform: rotate(180deg);
          transition: transform 0.35s ease;
        }
      }
    }

    .custom-accordion-body {
      @include body-base;

      background-color: unset;
      text-align: left;
      padding: unset;
      padding-right: 2rem;
      margin-top: var(--spacing-04);
    }
  }
}