@salesforce-ux/design-system/css/expandable-section/base/index.css

Salesforce Lightning Design System

/*! Lightning Design System 2.12.0 */
@charset "UTF-8";
.slds-section {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}
.slds-section__title {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  font-size: 1rem;
  line-height: 1.875rem;
  border: 1px solid transparent;
  border-radius: 0.25rem;
}
.slds-section__title-action {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  background: #f3f2f2;
  cursor: pointer;
  width: 100%;
  text-align: left;
  color: currentColor;
  font-size: inherit;
  padding: 0 0.5rem;
}
.slds-section__title-action:hover,
.slds-section__title-action:focus,
.slds-section__title-action:active {
  background: #eef1f6;
  color: inherit;
}
.slds-section__content {
  overflow: hidden;
  visibility: hidden;
  opacity: 0;
  height: 0;
}
.slds-section__title-action-icon {
  -webkit-transform: rotate(-90deg);
  transform: rotate(-90deg);
}
.slds-section.slds-is-open .slds-section__title-action-icon {
  -webkit-transform: rotate(0deg);
  transform: rotate(0deg);
  -webkit-transform-origin: 45%;
  transform-origin: 45%;
}
.slds-section.slds-is-open .slds-section__content {
  padding-top: 0.5rem;
  overflow: visible;
  visibility: visible;
  opacity: 1;
  height: auto;
}

.slds-section-title_divider {
  font-size: 0.75rem;
  line-height: 1.25;
  color: #3e3e3c;
  text-transform: uppercase;
  letter-spacing: 0.0625rem;
  padding: 0.5rem 1rem;
  background: #f3f2f2;
}