/* ==========================================================================
   Blog article — header, metadata, sidebar, syntax highlighting
   ========================================================================== */

.article-header {
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.article-header h1 {
    line-height: 1.25;
    margin: 0 0 var(--space-l) 0;
    max-inline-size: 32ch;
    text-wrap: balance;
}

.subtitle {
    max-width: 45rem;
    font-size: var(--text-size-prose);
    line-height: 1.6;
    margin: 0;
}

/* Article metadata */

.article-meta {
    max-width: 45rem;
    font-family: var(--font-mono);
    font-size: var(--text-size-ui);
    line-height: 1.3;
    color: var(--color-muted);
    margin: var(--space-s) 0 var(--space-m);
    overflow-wrap: anywhere;
}

.article-meta address {
    display: inline;
    font-style: normal;
    color: inherit;
}

.article-meta address a {
    color: var(--color-heading);
}

.article-meta .topic-tags {
    display: inline;
    margin: 0;
    color: var(--color-muted);
}

.article-meta .topic-tag {
    display: inline;
    color: inherit;
}

.article-meta .topic-tag::before {
    content: "#";
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    flex-shrink: 0;
}

/* Sidebar label */

.sidebar-label {
    font-family: var(--font-mono);
    display: none;
}

.sidebar-arrow {
    font-size: var(--text-size-ui);
    letter-spacing: 0;
}

/* Footer in article context */

article .site-footer {
    max-width: 45rem;
    font-size: var(--text-size-ui);
    animation-delay: 0.8s;
}

/* Syntax highlighting */

pre code.hljs {
    background: transparent;
    padding: 0;
}

.hljs-comment {
    color: var(--color-muted);
}

.hljs-title {
    color: var(--color-accent);
}

.hljs-keyword {
    color: var(--color-accent);
}

.hljs-number,
.hljs-literal {
    color: var(--color-accent);
}

.hljs-punctuation {
    color: var(--color-subtle);
}

.hljs-operator {
    color: var(--color-fg);
}

/* Animations */

.js-animated .article-header {
    opacity: 0;
    animation: fadeIn 0.6s ease-out 0.4s forwards;
}

/* Responsive: desktop */

@media (min-width: 921px) {
    .sidebar-label {
        display: flex;
        position: fixed;
        right: var(--space-xl);
        top: 50%;
        writing-mode: vertical-rl;
        font-size: var(--text-size-ui);
        line-height: 1.2;
        letter-spacing: 0.18em;
        text-transform: uppercase;
        color: var(--color-subtle);
        align-items: flex-start;
        gap: var(--space-s);
    }
}