.tree-padding {
    /* place-items: center; */
    display: grid;
    --spacing: 1.5rem;
    --radius: 10px;
    --rounding: 4px;
    --width: 36;
    --accent: #696;
    --dark-grey: #ddd;
    --grey: #eee;
    --light-grey: #f8f8f8;
    padding-left: 1rem;
    /* font-family: Arial, Helvetica, sans-serif;
    font-weight: 300; */
    /* font-size: clamp(16px, 100vw / var(--width), 20px); */
    /* font-feature-settings: 'onum','pnum'; */
    line-height: 1.4;
    -webkit-text-size-adjust: none;
    text-size-adjust: none;
    /* height: 100%; */
}

.tree-padding li {
    display: block;
    position: relative;
    padding-left: calc(2 * var(--spacing) - var(--radius) - 2px);
}

.tree-padding ul {
    margin-left: calc(var(--radius) - var(--spacing));
    padding-left: 0;
}

.tree-vertical-lines ul li {
    border-left: 2px solid #ddd;
}

.tree-vertical-lines ul li:last-child {
    border-color: transparent;
}

.tree-horizontal-lines ul li::before {
    content: '';
    display: block;
    position: absolute;
    top: calc(var(--spacing) / -2);
    left: -2px;
    width: calc(var(--spacing) + 2px);
    height: calc(var(--spacing) + 1px);
    border: solid var(--dark-grey);
    border-width: 0 0 2px 2px;
}

.tree-summaries summary {
    display: block;
    cursor: pointer;
}

.tree-summaries summary::marker,
.tree-summaries summary::-webkit-details-marker {
    display: none;
}

.tree-summaries summary:focus {
    outline: none;
}

.tree-summaries summary:focus-visible {
    outline: 1px dotted #000;
}

.tree-markers li::after,
.tree-markers summary::before {
    content: '';
    display: block;
    position: absolute;
    top: calc(var(--spacing) / 2 - var(--radius));
    left: calc(var(--spacing) - var(--radius) - 1px);
    width: calc(2 * var(--radius));
    height: calc(2 * var(--radius));
    border-radius: 50%;
    /* background: var(--dark-grey); */
}

.tree-buttons summary::before {
    content: '📁';
    z-index: 1;
    /* background: var(--accent); */
    color: #fff;
    font-weight: 400;
    /* line-height: calc(2 * var(--radius) - 2px); */
    line-height: 2.25;
    text-align: center;
}

.tree-buttons details[open]>summary::before {
    
    content: '📂';
}