/* =============================================================
   Bludit ToC Plugin — toc.css
   Self-contained: no dependency on the host theme's CSS variables.
   Dark mode is handled via prefers-color-scheme.
   If the theme exposes --accent / --text-muted / --bg-primary,
   those are layered on top via @supports for a seamless integration.
   ============================================================= */

/* ---- Color tokens (light) ---- */
#bltoc-sidebar {
    --bltoc-text:       #777;
    --bltoc-hover:      #111;
    --bltoc-active:     #0066cc;
    --bltoc-label:      #999;
    --bltoc-bg:         #fff;
    --bltoc-border:     rgba(0,0,0,0.08);
    --bltoc-fab-bg:     #0066cc;
    --bltoc-fab-color:  #fff;
}

/* ---- Color tokens (dark) ---- */
@media (prefers-color-scheme: dark) {
    #bltoc-sidebar {
        --bltoc-text:   #999;
        --bltoc-hover:  #eee;
        --bltoc-active: #4d9fff;
        --bltoc-label:  #666;
        --bltoc-bg:     #1a1a1a;
        --bltoc-border: rgba(255,255,255,0.08);
    }
}

/* Let blowdit (or any theme) override via its own design tokens */
@supports (color: var(--accent)) {
    #bltoc-sidebar { --bltoc-active: var(--accent); }
}
@supports (color: var(--text-muted)) {
    #bltoc-sidebar { --bltoc-text: var(--text-muted); }
}
@supports (color: var(--bg-primary)) {
    #bltoc-sidebar { --bltoc-bg: var(--bg-primary); }
}

/* ============================================================
   Desktop fixed sidebar
   Visible only at min-width set by the admin (default 1280px).
   JS adds .bltoc-ready when headings are found, making it appear.
   ============================================================ */
.bltoc-sidebar {
    display: none; /* hidden until JS confirms headings exist */
    position: fixed;
    left: 1rem;
    top: 5rem;   /* approx below a typical navbar; fine-tuned with navbarHeight in JS */
    width: 210px;
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 200;
    font-size: 0.8125rem;
    line-height: 1.5;
    scrollbar-width: thin;
    scrollbar-color: var(--bltoc-border) transparent;
}

/* JS adds data-bltoc-minwidth on <html>; sidebar shows only above that threshold. */
/* Actual media-query breakpoint is injected by JS via a <style> tag since the
   min-width value is dynamic (set in admin). */

/* ---- Sidebar header ("On this page") ---- */
.bltoc-header {
    margin-bottom: 0.65rem;
}

.bltoc-title {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--bltoc-label);
}

/* ---- ToC list ---- */
.bltoc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.bltoc-item {
    padding: 0.12rem 0;
}

.bltoc-h3 { padding-left: 0.75rem; }
.bltoc-h4 { padding-left: 1.5rem; }

.bltoc-link {
    display: block;
    color: var(--bltoc-text);
    text-decoration: none;
    line-height: 1.5;
    transition: color 0.15s ease;
}

.bltoc-link:hover {
    color: var(--bltoc-hover);
    text-decoration: none;
}

.bltoc-link.active {
    color: var(--bltoc-active);
    font-weight: 600;
}

/* ============================================================
   Mobile floating action button + bottom drawer
   FAB appears below the sidebar breakpoint.
   Both are injected by JS, but their CSS lives here.
   ============================================================ */
.bltoc-fab {
    display: none; /* shown by JS via flex when headings exist */
    position: fixed;
    left: 1.5rem;
    bottom: 1.5rem;
    z-index: 1500;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: none;
    background: var(--bltoc-fab-bg, #0066cc);
    color: var(--bltoc-fab-color, #fff);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(0,0,0,0.25);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.bltoc-fab:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 14px rgba(0,0,0,0.3);
}

.bltoc-fab svg { display: block; }

/* ---- Bottom drawer backdrop ---- */
.bltoc-drawer {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, visibility 0s linear 0.22s;
}

.bltoc-drawer.is-open {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.22s ease;
}

/* ---- Drawer panel (slides up from bottom) ---- */
.bltoc-drawer-panel {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    border-radius: 1rem 1rem 0 0;
    padding: 1.5rem 1.5rem calc(1.5rem + env(safe-area-inset-bottom, 0px));
    max-height: 72vh;
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform 0.25s ease;
}

@media (prefers-color-scheme: dark) {
    .bltoc-drawer-panel { background: #1e1e1e; }
}

@supports (color: var(--bg-primary)) {
    .bltoc-drawer-panel { background: var(--bg-primary); }
}

.bltoc-drawer.is-open .bltoc-drawer-panel {
    transform: translateY(0);
}

.bltoc-drawer-title {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #999;
    margin-bottom: 0.75rem;
}

.bltoc-drawer .bltoc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.bltoc-drawer .bltoc-link {
    display: block;
    padding: 0.5rem 0;
    color: #555;
    text-decoration: none;
}

.bltoc-drawer .bltoc-link:hover {
    color: #0066cc;
    text-decoration: none;
}

@media (prefers-color-scheme: dark) {
    .bltoc-drawer .bltoc-link       { color: #ccc; }
    .bltoc-drawer .bltoc-link:hover { color: #4d9fff; }
}

@supports (color: var(--accent)) {
    .bltoc-drawer .bltoc-link:hover { color: var(--accent); }
}