/* --- tableOfContents.css --- */

#toc-container .nav > li > a {
    padding: 3px 0px;
    display: block;
    text-decoration: none;
    border-radius: 4px;
    color: #333;
    transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
}
#toc-container .nav > li > a:hover,
#toc-container .nav > li > a:focus {
    background-color: #eee;
    text-decoration: none;
}
/* Bootstrap 5 adds .active to <a>; Bootstrap 3/4 added it to <li> — support both */
#toc-container .nav > li.active > a,
#toc-container .nav > li > a.active {
    color: var(--p) !important;
    font-weight: bold;
    background-color: transparent;
    border-radius: 4px;
}
.toc-list-inner { margin-left: 15px; padding-left: 10px; border-left: 1px solid #ccc; }
.toc-number { margin-right: 8px; font-weight: normal; color: #555; }

.toc-placeholder {
    display: none;
    clear: both;
}
.toc-desktop-title {
    display: none;
    font-size: 1.1rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #ddd;
}

/* === Desktop === */
@media (min-width: 768px) {
    .toc-desktop-title {
        display: block;
        padding: 10px;
    }
    /* Layout: Sidebar */
    #toc-container.layout-sidebar {
        position: -webkit-sticky; position: sticky;
        top: 20px;
        max-height: calc(100vh - 40px);
        overflow-y: auto;
    }
    #toc-container.layout-sidebar .toc-list-container {
        border: 1px solid #ddd; padding: 15px;
        border-radius: 4px; background-color: #fff;
    }

    /* Layout: Top-then-Sidebar */
    #toc-container.layout-top-then-sidebar {
        position: relative;
        width: 100%;
        margin-bottom: 25px;
        padding: 15px;
        border: 1px solid rgba(51,51,51,0.15);
        background: #f8f9fa;
        border-radius: 6px;
        transition: opacity 0.15s ease, visibility 0s 0.15s;
    }
    #toc-container.layout-top-then-sidebar.toc-fixed-right-active {
        opacity: 0;
        visibility: hidden;
    }

    #toc-fixed-right-sidebar {
        display: none;
        position: fixed;
        top: 70px;
        right: 0;
        width: 240px;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
        z-index: 1020;
        background-color: #fff;
        border-left: 3px solid var(--p, #F57F25);
        box-shadow: -4px 0 16px rgba(0,0,0,0.10);
        padding: 0;
        font-size: 13px;
    }
    #toc-fixed-right-sidebar.active {
        display: block;
    }

    .toc-placeholder.active-for-top-then-sidebar-desktop {
        display: block;
    }

    .toc-title-bar { display: none; }
    #toc-container .toc-list-container, #toc-fixed-right-sidebar .toc-list-container {
        display: block !important;
        padding: 10px 12px;
    }
    #toc-fixed-right-sidebar .toc-desktop-title {
        font-size: 0.9rem;
        padding: 10px 12px 8px;
        margin: 0;
        border-bottom: 1px solid #eee;
    }
    #toc-container .nav > li.active > a, #toc-container .nav > li > a.active,
    #toc-fixed-right-sidebar .nav > li.active > a, #toc-fixed-right-sidebar .nav > li > a.active {
        border-radius: 0;
        background-color: transparent;
        color: var(--p);
        font-weight: bold;
    }
    #toc-container .nav > li > a:hover, #toc-fixed-right-sidebar .nav > li > a:hover {
        background-color: #ecf0f1;
        color: #2c3e50;
    }
}

/* === Mobile === */
@media (max-width: 767px) {
    .toc-placeholder {
        display: none !important;
    }

    #toc-container {
        position: fixed;
        top: 0; left: 0; width: 100%;
        z-index: 1030;
        background-color: #ffffff;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        border-bottom: 1px solid #ddd;
        height: 50px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-100%);
        transition: opacity 0.3s ease, visibility 0s 0.3s, transform 0.3s ease;
    }
    #toc-container.toc-is-visible {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        transition-delay: 0s;
    }
    #toc-fixed-right-sidebar {
        display: none !important;
    }
    .toc-title-bar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0 15px;
        cursor: pointer;
        height: 100%;
    }
    .toc-title-text {
        font-weight: bold; color: #333; white-space: nowrap;
        overflow: hidden; text-overflow: ellipsis;
    }
    .toc-title-bar .toc-arrow {
        font-size: 1.2em; transition: transform 0.3s ease-in-out;
    }
    .toc-list-container {
        display: none;
        position: absolute;
        top: 50px;
        left: 0; right: 0;
        max-height: calc(80vh - 50px);
        overflow-y: auto;
        padding: 10px 15px;
        background-color: #f9f9f9;
        border-top: 1px solid #eee;
        box-shadow: 0 3px 5px rgba(0,0,0,0.1);
    }
    .nav-stacked > li + li { margin-top: 2px; margin-left: 0; }

    #toc-container.is-expanded .toc-list-container { display: block; }
    #toc-container.is-expanded .toc-arrow { transform: rotate(180deg); }
}