.accordion { max-width: 400px; margin: 20px auto; }
.accordion-item { border: 1px solid #000; margin-bottom: 5px; }
.accordion-item-header { background-color: #000; padding: 10px; cursor: pointer; color: white; font-family: 'Courier New', Courier, monospace; }
.accordion-item-header::after { content: '\2212'; color: white; font-weight: bold; float: right; margin-left: 5px; }
.accordion-item-header.collapsed::after { content: '\002B'; }
.accordion-item-body { height: 0; overflow: hidden; }
.accordion-item-body pre { margin: 0; padding: 8px 16px; font-family: 'Courier New', Courier, monospace; }