.collapse-item {
  border-color: var(--collapse-border-color);
  border-style: var(--collapse-border-style);
  border-width: var(--collapse-border-width);
  border-radius: var(--collapse-border-radius);
  background-color: var(--collapse-background-color);
  overflow: clip;
}

.collapse-btn {
  align-items: center;
  width: 100%;
  display: inline-flex;
  border: none;
  line-height: normal;
  border-bottom: var(--collapse-border-width) var(--collapse-border-style) var(--collapse-border-color);
  padding-inline: var(--collapse-button-padding-x);
  padding-block: var(--collapse-button-padding-y);
  background-color: var(--collapse-button-background-color);
}
.collapse-btn[aria-expanded=false] {
  border-bottom: none;
}

.collapse-btn-sm {
  padding-inline: var(--collapse-button-padding-x-sm);
  padding-block: var(--collapse-button-padding-y-sm);
}

.collapse-btn-md {
  padding-inline: var(--collapse-button-padding-x-md);
  padding-block: var(--collapse-button-padding-y-md);
}

.collapse-btn-lg {
  padding-inline: var(--collapse-button-padding-x-lg);
  padding-block: var(--collapse-button-padding-y-lg);
}

.collapse-body {
  padding-inline: var(--collapse-body-padding-x);
  padding-block: var(--collapse-body-padding-y);
}

.collapse-indicator::after {
  content: var(--collapse-indicator-content);
  display: inline-block;
  transition: transform 0.2s ease;
}

.collapse-btn.is-open .collapse-indicator::after {
  content: var(--collapse-indicator-content);
  transform: rotate(135deg);
}