body {
  background-color: #f5f5f5;
  padding: 2rem;
  font-family: Gill Sans, Gill Sans MT, Calibri, Trebuchet MS, sans-serif;
}

ul {
  margin: 0;
}

main {
  border-top: 1px solid rgba(0, 0, 0, .1);
  max-width: 600px;
  margin: 0 auto;
}
details-summary {
  border-bottom: 1px solid rgb(var(--details-summary-border-color, 0, 0, 0), .1);
  display: block;
}

details-summary:not(:defined) {
  display: none;
}

details-summary details {
  flex-direction: column;
  display: flex;
  overflow: hidden;
}

details-summary details summary {
  cursor: pointer;
  padding: var(--details-summary-padding, 1rem) 0;
  font-weight: var(--details-summary-font-weight, 600);
  font-size: var(--details-summary-font-size, 16px);
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  display: flex;
}

details-summary details summary::-webkit-details-marker {
  display: none;
}

details-summary details .details-summary-icon {
  width: 16px;
  height: 16px;
  transition: transform var(--details-summary-transition-speed, .3s) ease;
  flex-shrink: 0;
  position: relative;
}

details-summary details .details-summary-icon:before {
  width: 2px;
  height: 100%;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

details-summary details .details-summary-icon:after {
  width: 100%;
  height: 2px;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

details-summary details .details-summary-icon:before {
  content: "";
  background-color: currentColor;
  position: absolute;
}

details-summary details .details-summary-icon:after {
  content: "";
  background-color: currentColor;
  position: absolute;
}

details-summary details .details-content {
  padding-bottom: var(--details-summary-padding, 1rem);
  color: var(--details-summary-content-color, #444);
  opacity: 0;
  transition: opacity var(--details-summary-transition-speed, .3s) ease,
                transform var(--details-summary-transition-speed, .3s) ease;
  line-height: 1.5;
  transform: translateY(-10px);
}

details-summary details[open]:not(.is-closing) .details-summary-icon {
  transform: rotate(45deg);
}

details-summary details[open]:not(.is-closing) .details-content {
  opacity: 1;
  transform: translateY(0);
}
@media screen and (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

.visually-hidden:not(:is(:focus, :active)) {
  clip-path: inset(100%);
  white-space: nowrap;
  width: 1px;
  height: 1px;
  position: absolute;
  overflow: hidden;
}