.details {
    padding-bottom: 1ch;
    border-bottom: 1px solid #ccc;
}

.details__trigger {
    all: inherit;
    display: block;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin: 0;
    padding: .5em 0;
    border: 0;
    cursor: pointer;
}

.details__title {
    position: relative;
    display: block;
    font-weight: 700;
}
.details__title::before,
.details__title::after {
    content: '';
    position: absolute;
    top: 50%;
    background: currentColor;
}
.details__title::after {
    right: .5rem;
    transform: translate(50%, -50%);
    height: 1rem;
    width: .25rem;
}
.details__title::before {
    right: 0;
    transform: translate(0, -50%);
    height: .25rem;
    width: 1rem;
}

.details__trigger::marker {
    display: none;
}
.details__trigger::-webkit-details-marker {
    display: none;
}

.details[data-expanded="false"] .details__content {
    display: none;
}
.details[open] .details__title::after,
.details[data-expanded="true"] .details__title::after {
    display: none;
}