.table-of-contents {
    position: fixed;
    top: 15%;
    left: 1rem;
    z-index: 999;
    transition: all .3s;
}

.table-of-contents.show{
    top: 2rem;
}

.table-of-contents-icon {
    padding: 2px;
    width: 52px;
    height: 52px;
    border-radius: var(--border-radius);
    background: var(--bg);
    border: 2px #ccc solid;
    transition: transform .3s, box-shadow .3s;
    opacity: .6;
    overflow: hidden;
    position: relative;
}

.table-of-contents-icon svg {
    transition: transform .3s;
    position: absolute;
    top: 0;
    left: 0;
}

.table-of-contents-icon .table-of-contents-icon-close {
    transform: translateX(-200%);
}

.table-of-contents.show .table-of-contents-icon .table-of-contents-icon-close {
    transform: translateX(0);
}

.table-of-contents.show .table-of-contents-icon .table-of-contents-icon-open {
    transform: translateX(200%);
}

.table-of-contents-icon:hover {
    opacity: 1;
    box-shadow: var(--box-shadow);
}

.table-of-contents-inner {
    position: absolute;
    padding: 1rem;
    top: 60px;
    left: -700px;
    background: var(--bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    width: 420px;
    max-width: 80vw;
    margin-top: .5rem;
    opacity: .6;
    transition: all .3s;
}

.table-of-contents.show .table-of-contents-inner {
    left: 0;
}

.table-of-contents-inner:hover {
    opacity: 1;
}

#table-of-contents-inner {
    max-height: 80vh;
    overflow-y: auto;
}

.table-of-contents-inner a {
    display: block;
    text-decoration: none;
    margin-bottom: 1rem;
}

.toc-sublist {
    padding-left: 1rem;
    margin-top: -0.5rem;
    margin-bottom: 1rem;
    opacity: .6;
}

.toc-sublist:hover {
    opacity: 1;
}

.toc-sublist a {
    margin-bottom: .5rem;
}

@media (max-width: 1020px) {
    .table-of-contents-inner {
        opacity: 1;
    }    
}

@media (max-width: 620px) {
    .table-of-contents {
        top: 10%;
        left: -1rem;
    }
    .table-of-contents.show{
        left: 1rem;
    }
}