/* ═══════════════════════════════════════════════════════════════
   MARKDOWN EXTENSIONS — Digital Rust
   Alerts, TOC, collapsibles, Mermaid, heading anchors
   ═══════════════════════════════════════════════════════════════ */

/* Highlighted text */
mark {
    background-color: var(--dr-stack-overglow);
    color: var(--dr-horizon);
    padding: 0.1em 0.2em;
    border-radius: var(--dr-radius-sm);
}

[data-theme="light"] mark { background-color: var(--dr-stack-overglow-bright); color: var(--dr-text-primary); }
:root[data-theme="dark"] mark { background-color: rgba(212, 167, 89, 0.3); color: var(--dr-stack-overglow); }

/* Collapsible sections */
.markdown-details {
    border: var(--dr-border);
    border-radius: var(--dr-radius);
    padding: 0.5em;
    margin: 1em 0;
}

.markdown-details summary {
    font-weight: var(--dr-font-weight);
    font-family: var(--dr-font-heading);
    font-variation-settings: "slnt" 0;
    cursor: pointer;
    padding: 0.5em;
    user-select: none;
}

.markdown-details summary:hover { background-color: var(--dr-surface-highlight); }

.details-content {
    padding: 0.5em;
    border-top: var(--dr-border-subtle);
    margin-top: 0.5em;
}

/* Video embeds */
.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    max-width: 100%;
    margin: 1.5em 0;
}

.video-container iframe {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
}

/* RTL/LTR */
.rtl, .rtl * { direction: rtl; unicode-bidi: isolate; text-align: right; margin: 0.2em 0 1em 0; }
.ltr, .ltr * { direction: ltr; unicode-bidi: isolate; text-align: left; margin: 0.2em 0 1em 0; }

/* Table of Contents */
.wiki-toc {
    margin: 1.5rem 0;
    padding: 1rem;
    background-color: var(--dr-surface-elevated);
    border: var(--dr-border);
    border-radius: var(--dr-radius);
}

.toc-title {
    font-size: var(--dr-text-lg);
    font-family: var(--dr-font-heading);
    font-variation-settings: "slnt" 0;
    font-weight: var(--dr-font-weight);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: var(--dr-border-subtle);
    color: var(--dr-text-primary);
}

.toc-list { margin: 0; padding-left: 1rem; list-style-type: none; }
.toc-list ul { list-style-type: none; padding-left: 1.5rem; margin: 0.5rem 0; }
.toc-list li { margin-bottom: 0.5rem; line-height: 1.4; }

.toc-list a {
    color: var(--dr-text-link);
    text-decoration: underline;
    text-decoration-color: var(--dr-phantom-current);
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    display: inline-block;
    transition: color var(--dr-transition-fast);
}

.toc-list a:hover { color: var(--dr-text-link-hover); text-decoration-thickness: 2px; }

.toc-empty { font-style: italic; color: var(--dr-text-tertiary); margin: 0; }

:root[data-theme="dark"] .wiki-toc { background-color: var(--code-bg); }

/* Mermaid diagrams */
.mermaid {
    margin: 20px 0;
    overflow: auto;
    text-align: center;
    background-color: transparent;
    border-radius: var(--dr-radius);
    padding: 10px 0;
    transition: opacity 0.2s ease;
    color: transparent;
    font-size: 0;
    line-height: 0;
}

.mermaid svg { transition: opacity 0.15s ease; color: initial; font-size: initial; line-height: initial; }
.mermaid:has(svg) { color: initial; font-size: initial; line-height: initial; }
.mermaid.mermaid-rendered { color: initial; font-size: initial; line-height: initial; }

.mermaid-rerendering {
    position: relative;
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.mermaid-rerendering::after {
    content: "Switching theme...";
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: var(--dr-surface-secondary);
    color: var(--dr-text-primary);
    padding: 8px 12px;
    border-radius: var(--dr-radius);
    font-size: var(--dr-text-sm);
    border: var(--dr-border);
    z-index: 10;
    pointer-events: none;
}

@media screen { .video-print-placeholder { display: none; } }

/* Heading anchors */
.markdown-content .heading-anchor,
.editor-preview .heading-anchor,
.version-content .heading-anchor {
    opacity: 0;
    margin-left: 0.25em;
    text-decoration: none;
    color: var(--dr-text-tertiary);
    transition: opacity 0.15s ease;
}

.markdown-content .heading-anchor:hover,
.editor-preview .heading-anchor:hover,
.version-content .heading-anchor:hover { text-decoration: none; }

.markdown-content h1:hover .heading-anchor,
.markdown-content h2:hover .heading-anchor,
.markdown-content h3:hover .heading-anchor,
.markdown-content h4:hover .heading-anchor,
.markdown-content h5:hover .heading-anchor,
.markdown-content h6:hover .heading-anchor,
.editor-preview h1:hover .heading-anchor,
.editor-preview h2:hover .heading-anchor,
.editor-preview h3:hover .heading-anchor,
.editor-preview h4:hover .heading-anchor,
.editor-preview h5:hover .heading-anchor,
.editor-preview h6:hover .heading-anchor,
.version-content h1:hover .heading-anchor,
.version-content h2:hover .heading-anchor,
.version-content h3:hover .heading-anchor,
.version-content h4:hover .heading-anchor,
.version-content h5:hover .heading-anchor,
.version-content h6:hover .heading-anchor,
.heading-anchor:focus, .heading-anchor:active { opacity: 1; }

/* GitHub-flavored Alerts — DR style */
.markdown-alert {
    padding: 8px 16px;
    margin-bottom: 16px;
    border: 1px solid var(--dr-dark-packet);
    border-top: 2px solid;
    border-radius: var(--dr-radius);
    background-color: var(--dr-surface-elevated);
}

.markdown-alert-title {
    display: flex; align-items: center;
    font-weight: var(--dr-font-weight);
    margin-top: 0; margin-bottom: 4px;
    font-size: var(--dr-text-sm);
}

.markdown-alert-title svg, .markdown-alert-title i { margin-right: 8px; fill: currentColor; }
.markdown-alert-content { font-size: var(--dr-text-sm); }
.markdown-alert-content > :first-child { margin-top: 0; }
.markdown-alert-content > :last-child { margin-bottom: 0; }

/* Alert Colors — using DR semantic tokens */
.markdown-alert-note { border-color: var(--dr-dark-packet); border-top-color: var(--dr-info); }
.markdown-alert-note .markdown-alert-title { color: var(--dr-info); }

.markdown-alert-tip { border-color: var(--dr-dark-packet); border-top-color: var(--dr-success); }
.markdown-alert-tip .markdown-alert-title { color: var(--dr-success); }

.markdown-alert-important { border-color: var(--dr-dark-packet); border-top-color: var(--dr-fractured-shell); }
.markdown-alert-important .markdown-alert-title { color: var(--dr-fractured-shell); }

.markdown-alert-warning { border-color: var(--dr-dark-packet); border-top-color: var(--dr-warning); }
.markdown-alert-warning .markdown-alert-title { color: var(--dr-warning); }

.markdown-alert-caution { border-color: var(--dr-dark-packet); border-top-color: var(--dr-error); }
.markdown-alert-caution .markdown-alert-title { color: var(--dr-error); }

/* Print styles */
@media print {
    .markdown-details { display: block !important; border: 1px solid #ddd !important; }
    .markdown-details summary { display: none !important; }
    .markdown-details .details-content { display: block !important; border-top: none !important; padding-top: 0 !important; }
    details.markdown-details { height: auto !important; overflow: visible !important; }
    details.markdown-details > * { display: block !important; }
    .video-container, .local-video-player { display: none !important; }
    .video-print-placeholder {
        display: block !important;
        border: 1px solid #ddd; padding: 1em; margin: 1em 0;
        background-color: #f9f9f9;
    }
    .wiki-toc { background-color: #f8f8f8 !important; border: 1px solid #ddd !important; break-inside: avoid; }
    .toc-title { color: black !important; border-bottom-color: #ddd !important; }
    .toc-list a { color: black !important; }
}