:root {
    --sidebar-width: 320px;
    --transition-speed: 0.2s;
    --dynamic-header-height: 57px;
    --footer-height: 57px;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    border-right: 1px solid var(--bs-border-color);
    transition: transform var(--transition-speed) ease-in-out, top var(--transition-speed) ease-in-out, height var(--transition-speed) ease-in-out;
    background-color: var(--bs-body-bg);
}

.main-content {
    margin-left: var(--sidebar-width);
    flex-grow: 1;
    transition: margin-left var(--transition-speed) ease-in-out;
}

.search-container {
    position: sticky;
    top: 0;
    z-index: 10;
    background-color: var(--bs-body-bg);
    border-bottom: 1px solid var(--bs-border-color);
}

.nav-tree-container {
    height: calc(100vh - 95px);
    overflow-y: auto;
}

.btn-toggle .toggle-icon {
    transition: transform var(--transition-speed) ease;
}

.btn-toggle:not(.collapsed) .toggle-icon {
    transform: rotate(90deg);
}

.hover-bg:hover {
    background-color: var(--bs-tertiary-bg);
}

.transition-all {
    transition: all var(--transition-speed) ease;
}

#content table {
    width: 100%;
    margin-bottom: 1rem;
    border-collapse: collapse;
}

#content table th, #content table td {
    padding: 0.75rem;
    border: 1px solid var(--bs-border-color);
}

#content table th {
    background-color: var(--bs-tertiary-bg);
}

#content pre {
    background-color: var(--bs-tertiary-bg);
    padding: 1rem;
    border-radius: 0.375rem;
    overflow-x: auto;
}

#content img {
    max-width: 100%;
    height: auto;
}

.toc-link {
    font-size: 0.85rem;
    color: var(--bs-secondary-color);
    transition: color var(--transition-speed) ease;
}

.toc-link:hover, .toc-link.active-toc {
    color: var(--bs-link-color) !important;
    text-decoration: underline !important;
}

article h2, article h3, article h4 {
    position: relative;
}

.header-anchor {
    margin-left: 6px;
    opacity: 0;
    font-size: 0.9em;
    vertical-align: middle;
    transition: opacity 0.15s ease-in-out, transform 0.15s ease-in-out;
    display: inline-block;
}

article h2:hover .header-anchor,
article h3:hover .header-anchor,
article h4:hover .header-anchor {
    opacity: 0.55;
}

.header-anchor:hover {
    opacity: 1 !important;
    transform: scale(1.1);
}

@media print {
    .header-anchor {
        display: none !important;
    }
}

.footer {
    width: 100%;
    margin-left: 0 !important;
    z-index: 1050; 
    position: relative;
    height: var(--footer-height);
}

@media (max-width: 991.98px) {
    .sidebar {
        /* Place the sidebar precisely below the dynamically calculated header height */
        top: var(--dynamic-header-height);
        height: calc(100vh - var(--dynamic-header-height) - var(--footer-height));
        z-index: 999; /* Positioned below header stack */
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .sidebar .nav-tree-container {
        height: calc(100vh - var(--dynamic-header-height) - var(--footer-height) - 95px);
    }
    .main-content {
        margin-left: 0;
    }
    .main-content.sidebar-open {
        margin-left: 0;
    }
}

/* ==========================================================================
   Print Stylesheet
   ========================================================================== */
@media print {
    /* 1. Force hide the sidebar, search bar, togglers, TOC, and footer */
    #sidebar,
    .sidebar,
    #sidebar-toggle,
    #search-input,
    #global-footer,
    #document-toc-container,
    .input-group,
    .spinner-border {
        display: none !important;
    }

    /* 2. Reset the main container to span 100% width on paper & fix cutoff */
    body, 
    #main-panel,
    .main-content, 
    .container-fluid, 
    article {
        background: transparent !important;
        color: #000000 !important;
        
        /* Forcibly strip out any sidebar margins/paddings pushing text to the right */
        margin: 0 !important;
        margin-left: 0 !important; 
        padding: 0 !important;
        padding-left: 0 !important;
        
        left: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        box-shadow: none !important;
        position: static !important;
    }

    /* Ensure the wrapper rows and columns don't force side-margins either */
    .row, .col-12, .col-xl-10 {
        margin: 0 !important;
        padding: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
    }

    /* 3. Keep the header & breadcrumbs but style them cleanly for paper */
    #global-header {
        background: transparent !important;
        border-bottom: 1px solid #ddd !important;
        padding-bottom: 8px !important;
        margin-bottom: 20px !important;
        margin-left: 0 !important;
        padding-left: 0 !important;
        position: static !important; /* Prevent overlapping text on page 2+ */
    }

    /* 4. Append link destinations next to text so the physical paper remains useful */
    article a[href]:after {
        content: " (" attr(href) ")";
        font-size: 85%;
        color: #555;
    }

    /* Prevent printing hash links (like #introduction) */
    article a[href^="#"]:after {
        content: "" !important;
    }

    /* 5. Prevent awkward cuts at page breaks */
    h1, h2, h3 {
        page-break-after: avoid;
        page-break-inside: avoid;
    }
    
    img {
        page-break-inside: avoid;
        max-width: 100% !important;
    }
}