body {
  font-family: sans-serif;
  background: #0b0c10;
  color: #fff;
  padding: 2em;
}
.accordion-mode-toggle {
  text-align: right;
  max-width: 600px;
  margin: auto;
  margin-bottom: 1em;
}
.accordion-mode-toggle button {
  background: #171717;
  color: white;
  border: none;
  border-radius: 4px;
  padding: 0.5em 1em;
  font-size: 1em;
  cursor: pointer;
}
.accordion {
  max-width: 600px;
  margin: auto;
}
.accordion-item {
  border-radius: 0.5em;
  overflow: hidden;
  background: #2c2c2c;
  margin-bottom: 1em;
}
.accordion-header {
  width: 100%;
  text-align: left;
  background: #171717;
  color: #fff;
  border: none;
  padding: 1em;
  font-size: 1.1em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}
.accordion-header .title {
  flex-grow: 1;
}
.accordion-header .triangle {
  transition: transform 300ms ease;
}
.accordion-header.rotated .triangle {
  transform: rotate(90deg);
}
.accordion-content {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 400ms ease, opacity 400ms ease;
  padding: 0 1em;
}
.accordion-content.show {
  opacity: 1;
  padding: 1em;
}