/* Table of Contents Styling */
#custom-toc-container .toc-inner,
#toc-popup-content .toc-inner {
    font-size: 0.875rem; /* 14px, reduced font size */
    line-height: 1.5;
}

#custom-toc-container nav ul,
#toc-popup-content nav ul {
    padding-left: 0;
    list-style: none;
}

#custom-toc-container nav li,
#toc-popup-content nav li {
    margin-bottom: 0.5rem; /* 8px */
}

#custom-toc-container nav a,
#toc-popup-content nav a {
    display: block;
    padding: 0.25rem 1rem; /* 4px 16px */
    border-left: 3px solid transparent;
    color: #6b7280; /* zinc-500 */
    text-decoration: none;
    transition: all 0.2s ease-in-out;
}

#custom-toc-container nav a:hover,
#toc-popup-content nav a:hover {
    color: #111827; /* zinc-800 */
    border-left-color: #d1d5db; /* zinc-300 */
}

#custom-toc-container nav a.active,
#toc-popup-content nav a.active {
    font-weight: 600;
    color: #18181b; /* zinc-900 */
    border-left-color: #18181b; /* zinc-900 */
}

/* Indentation for nested levels */
#custom-toc-container nav ul ul,
#toc-popup-content nav ul ul {
    padding-left: 1rem; /* 16px */
    margin-top: 0.5rem; /* 8px */
}