details {
    border: 2px solid transparent;
    border-top-color: var(--text-color);
    padding: 0 1rem;
    margin-top: 1.5rem;
}

details[open] {
    border-color: var(--text-color);
    padding-bottom: 1rem;
}

details > summary {
    display: block;
    width: fit-content;

    transform: translateY(-55%);

    background-color: var(--background-color);
    padding: 0 0.5rem;
    cursor: pointer;
    user-select: none;
}

details > summary::before {
    content: "[ + ";
}

details[open] > summary::before {
    content: "[ - ";
}

details > summary::after {
    content: " ]";
}