[data-md-color-scheme="slate"] {
    --shadow-color: rgba(255, 255, 255, 0.1);
}

[data-md-color-scheme="theme"] {
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-md-color-scheme="simple"] {
    --shadow-color: rgba(0, 0, 0, 0.1);
}

.toc-container {
    margin: 20px 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 2px 2px 4px var(--shadow-color);
    border-left: 2px solid var(--md-accent-fg-color); /* Added thick left border */
}

.toc-header {
    background-color: var(--md-card-color);
    padding: 10px 15px;
    cursor: pointer;
    font-weight: bold;
    color: var(--md-typeset-color);
    transition: background-color 0.3s;
    border-radius: 8px 8px 0 0;
    position: relative;
}

.toc-header::after {
    content: '>';
    position: absolute;
    right: 15px;
    transition: transform 0.3s;
}

.toc-header.expanded::after {
    transform: rotate(90deg); /* Rotate to point downwards */
}

.toc {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: none;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
}

.toc.expanded {
    display: block;
    max-height: 2000px;
    opacity: 1;
}

.toc li {
    margin: 0;
}

.toc li:last-child {
    border-bottom: none;
}

.toc a {
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    color: var(--md-typeset-color);
    margin-bottom:20px;
    transition: background-color 0.3s, color 0.3s;
}

.toc a:hover {
    color: var(--md-accent-fg-color);
}