/* Blog: barra de leitura. Fica fixa sob o menu durante o artigo, mostra a
   seção em leitura e o quanto já foi lido, e abre a lista de seções. Substitui
   o índice lateral, que tirava o texto do eixo do título. */

.blog-readbar
{
    position: sticky;
    top: 68px;
    z-index: 40;
    border-bottom: 1px solid var(--line);
    background: rgba(250, 250, 247, .96);
    backdrop-filter: blur(8px);
}

.blog-readbar-in
{
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    max-width: 840px;
    height: 52px;
    margin: 0 auto;
}

.blog-readbar-now
{
    min-width: 0;
    margin: 0;
    overflow: hidden;
    font-size: 14px;
    font-weight: 500;
    color: var(--fg);
    white-space: nowrap;
    text-overflow: ellipsis;
}

.blog-readbar-toc > summary
{
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 12px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    font-size: 14px;
    font-weight: 500;
    color: var(--fg);
    white-space: nowrap;
    list-style: none;
    cursor: pointer;
}

.blog-readbar-toc > summary::-webkit-details-marker
{
    display: none;
}

.blog-readbar-toc > summary::after
{
    content: '';
    width: 7px;
    height: 7px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: translateY(-2px) rotate(45deg);
    transition: transform var(--t-state) var(--ease-out);
}

.blog-readbar-toc[open] > summary::after
{
    transform: translateY(2px) rotate(-135deg);
}

.blog-readbar-toc > summary:focus-visible
{
    outline: 2px solid var(--brand-spark);
    outline-offset: 2px;
}

.blog-readbar-toc ol
{
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: min(400px, 100%);
    max-height: 70vh;
    margin: 0;
    padding: 8px;
    overflow-y: auto;
    list-style: none;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
}

.blog-readbar-toc a
{
    display: block;
    padding: 9px 12px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    line-height: 1.35;
    color: var(--text-secondary);
}

.blog-readbar-toc a:hover
{
    background: var(--bg-tertiary);
    color: var(--fg);
}

.blog-readbar-toc a[aria-current]
{
    font-weight: 500;
    color: var(--brand);
}

.blog-readbar-progress
{
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 2px;
}

.blog-readbar-progress span
{
    display: block;
    height: 100%;
    background: var(--brand);
    transform: scaleX(0);
    transform-origin: left;
}

@media (max-width: 1024px)
{
    .blog-readbar
    {
        top: 60px;
        backdrop-filter: none;
    }
}

@media (prefers-reduced-motion: reduce)
{
    .blog-readbar-toc > summary::after
    {
        transition: none;
    }
}