/* SA Post TOC — Sabbir Ahmed */
.sa-toc {
    background: transparent;
    border-radius: 16px;
    padding: 24px;
    width: 100%;
    box-sizing: border-box;
    position: relative;
}

.sa-toc--sticky {
    position: sticky;
    top: 100px;
    align-self: flex-start;
}

/* ── Header ── */
.sa-toc__header-wrap {
    margin-bottom: 16px;
}

.sa-toc__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    color: rgba(17,17,17,0.6);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 12px;
    line-height: 1.2;
}

.sa-toc__toggle {
    display: none;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 4px;
    transition: transform 0.25s ease;
}

.sa-toc__toggle svg {
    width: 14px;
    height: 14px;
}

/* ── Progress Bar ── */
.sa-toc__progress {
    width: 100%;
    height: 2px;
    background: rgba(17,17,17,0.10);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.sa-toc__progress-fill {
    height: 100%;
    width: 0%;
    background: #1c57ff;
    border-radius: 2px;
    transition: width 0.15s linear;
    transform-origin: left;
}

/* ── List ── */
.sa-toc__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sa-toc__item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.5;
    position: relative;
    padding-left: 0;
    transition: padding-left 0.25s ease;
}

.sa-toc__item::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 4px;
    width: 0;
    height: calc(100% - 8px);
    background: transparent;
    border-radius: 2px;
    transition: width 0.25s ease, background 0.25s ease;
}

.sa-toc__item.is-active::before {
    width: 2px;
    background: #1c57ff;
}

.sa-toc__num {
    flex-shrink: 0;
    font-size: 14px;
    font-weight: 500;
    color: rgba(17,17,17,0.4);
    min-width: 16px;
    line-height: 1.5;
    transition: color 0.25s ease;
}

.sa-toc__item a {
    color: rgba(17,17,17,0.6);
    text-decoration: none;
    font-size: 14px;
    line-height: 1.5;
    transition: color 0.25s ease, font-weight 0.15s ease;
    flex: 1;
    word-wrap: break-word;
    min-width: 0;
}

.sa-toc__item a:hover {
    color: #000000;
}

.sa-toc__item.is-active a {
    color: #1c57ff;
    font-weight: 600;
}

.sa-toc__item.is-active .sa-toc__num {
    color: #1c57ff;
}

/* Sub-heading indents */
.sa-toc__item--h3 { padding-left: 16px; }
.sa-toc__item--h4 { padding-left: 32px; }
.sa-toc__item--h5 { padding-left: 48px; }
.sa-toc__item--h6 { padding-left: 64px; }

.sa-toc__empty {
    color: rgba(17,17,17,0.5);
    font-size: 13px;
    padding: 8px 0;
}

/* ── Mobile collapse ── */
@media (max-width: 1024px) {
    .sa-toc--sticky {
        position: static;
        top: auto;
    }
}

@media (max-width: 767px) {
    .sa-toc--mobile-collapse .sa-toc__toggle {
        display: inline-flex;
    }
    .sa-toc--mobile-collapse.is-collapsed .sa-toc__list {
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        margin: 0;
        transition: max-height 0.3s ease, opacity 0.2s ease;
    }
    .sa-toc--mobile-collapse:not(.is-collapsed) .sa-toc__list {
        max-height: 800px;
        opacity: 1;
        transition: max-height 0.4s ease, opacity 0.3s ease 0.1s;
    }
    .sa-toc--mobile-collapse.is-collapsed .sa-toc__toggle svg {
        transform: rotate(-90deg);
    }
    .sa-toc--mobile-collapse.is-collapsed .sa-toc__progress {
        display: none;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .sa-toc__item, .sa-toc__item a, .sa-toc__num, .sa-toc__progress-fill,
    .sa-toc__item::before, .sa-toc__toggle, .sa-toc__list {
        transition: none !important;
    }
}