24 lines · css
1details {2 background-color: rgba(50, 150, 220, 0.08);3 margin-bottom: 0.5em;4 padding: 0 1em;5 overflow-y: hidden; /* Suppress margin-collapsing */6}7details[open] {8 border-bottom: 1px solid rgba(0, 0, 128, 0.2);9 margin-bottom: 1em;10}11details summary {12 font-weight: bold;13 background-color: rgba(50, 150, 220, 0.1);14 border-color: rgba(0, 0, 128, 0.2);15 border-width: 1px;16 border-style: solid none;17 padding: 0.2em;18 margin: 0 -1em;19}20details summary:hover {21 background-color: rgba(50, 150, 220, 0.2);22 cursor: pointer;23}24