/* ============================================
   TOC – Table of Contents
   Scrapbook note pinned into the article body,
   collapsible via <details>
   ============================================ */

.article-toc {
    position: relative;
    background-color: var(--color-wash-yellow);
    border: 1px solid var(--color-ink-10);
    border-radius: var(--radius-hand);
    padding: var(--space-6);
    padding-top: calc(var(--space-6) + 8px);
    margin: var(--space-10) 0;
    box-shadow: var(--shadow-paper-lift);
}

/* Washi tape strip holding the note to the page */
.article-toc::before {
    content: "";
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%) rotate(-1.5deg);
    width: 140px;
    height: 28px;
    background-color: var(--color-sun-yellow-40);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
    z-index: 1;
}

/* Summary is the toggle: whole line clickable, marker replaced by our own caret */
.article-toc__title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-ink);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.article-toc__title::-webkit-details-marker {
    display: none;
}

.article-toc__title::before {
    content: "";
    width: 0;
    height: 0;
    border-left: 7px solid var(--color-papa-rust);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    transition: transform 0.2s ease;
}

.article-toc[open] .article-toc__title::before {
    transform: rotate(90deg);
}

.article-toc__title:focus-visible {
    outline: 2px solid var(--color-otto-dark);
    outline-offset: 3px;
}

/* Lists: numbered top level, dashed sub level */
.article-toc__list {
    list-style: none;
    margin: var(--space-4) 0 0;
    padding: 0;
    counter-reset: toc;
}

.article-toc__item {
    margin-bottom: var(--space-2);
}

.article-toc__list > .article-toc__item {
    counter-increment: toc;
    padding-left: var(--space-6);
    position: relative;
}

.article-toc__list > .article-toc__item::before {
    content: counter(toc) ".";
    position: absolute;
    left: 0;
    font-family: var(--font-heading);
    color: var(--color-papa-rust);
}

.article-toc__sublist {
    list-style: none;
    margin: var(--space-2) 0 var(--space-3);
    padding: 0 0 0 var(--space-4);
}

.article-toc__sublist .article-toc__item {
    position: relative;
    padding-left: var(--space-4);
    margin-bottom: var(--space-1);
}

.article-toc__sublist .article-toc__item::before {
    content: "–";
    position: absolute;
    left: 0;
    color: var(--color-otto-dark);
}

/* Links */
.article-toc__link {
    font-family: var(--font-body);
    font-size: var(--text-lg);
    color: var(--color-ink);
    text-decoration: none;
    border-bottom: 1px solid transparent;
}

.article-toc__sublist .article-toc__link {
    font-size: var(--text-base);
    color: var(--color-ink-70);
}

.article-toc__link:hover {
    color: var(--color-otto-dark);
    border-bottom-color: var(--color-otto-green-50);
}

.article-toc__link:focus-visible {
    outline: 2px solid var(--color-otto-dark);
    outline-offset: 2px;
}