/* ============================================
   PREEMPTIVE — BLOG / ARTICLE STYLES
   Extends the core design system for long-form
   posts and theme-matched inline SVG diagrams.
   ============================================ */

.article {
    padding: 30px 0 110px;
    position: relative;
    z-index: 1;
}

.article .container {
    max-width: 820px;
}

/* Back to resources */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 34px;
    transition: color 0.2s ease, gap 0.2s ease;
}
.back-link:hover { color: var(--neon); gap: 12px; }
.back-link svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 1.8; }

/* Article meta row */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 20px;
}
.article-meta .cat {
    color: var(--neon);
    text-shadow: 0 0 14px var(--neon-glow);
}
.article-meta .dot { color: var(--text-muted); opacity: 0.6; }

.article h1 {
    font-size: clamp(2rem, 4.4vw, 3.15rem);
    line-height: 1.08;
    margin-bottom: 22px;
}

.article-lead {
    font-size: 1.16rem;
    line-height: 1.75;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 400;
}

.article-byline {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 30px 0 8px;
    padding-top: 26px;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.article-byline .avatar {
    width: 38px; height: 38px;
    border-radius: 50%;
    display: grid; place-items: center;
    background: var(--neon-soft);
    border: 1px solid var(--border-strong);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--neon);
    flex: none;
}
.article-byline strong { color: var(--text-primary); font-weight: 600; }

/* ---------- Prose ---------- */
.prose { margin-top: 14px; }

.prose > p {
    color: var(--text-secondary);
    margin-bottom: 1.25em;
    font-size: 1.02rem;
}

.prose h2 {
    font-size: 1.62rem;
    margin: 2.1em 0 0.7em;
    padding-top: 0.4em;
    position: relative;
}
.prose h2::before {
    content: '';
    display: block;
    width: 34px; height: 2px;
    background: var(--neon);
    box-shadow: 0 0 14px var(--neon-glow);
    margin-bottom: 18px;
    border-radius: 2px;
}

.prose h3 {
    font-size: 1.22rem;
    margin: 1.7em 0 0.5em;
    color: var(--text-primary);
}

.prose ul, .prose ol {
    margin: 0 0 1.3em 1.1em;
    color: var(--text-secondary);
}
.prose li { margin-bottom: 0.55em; padding-left: 6px; }
.prose li::marker { color: var(--neon); }

.prose a {
    color: var(--neon);
    text-decoration: none;
    border-bottom: 1px solid var(--border-strong);
    transition: border-color 0.2s ease, text-shadow 0.2s ease;
}
.prose a:hover { text-shadow: 0 0 12px var(--neon-glow); border-color: var(--neon); }

.prose strong { color: var(--text-primary); font-weight: 600; }

.prose code {
    font-family: var(--font-mono);
    font-size: 0.86em;
    color: var(--mint-pale);
    background: rgba(88, 245, 160, 0.07);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 0.12em 0.42em;
}

.prose pre {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
    overflow-x: auto;
    margin: 0 0 1.5em;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-secondary);
}
.prose pre code {
    background: none; border: none; padding: 0; color: inherit; font-size: inherit;
}

.prose blockquote {
    border-left: 2px solid var(--neon);
    background: var(--bg-card);
    padding: 14px 22px;
    margin: 0 0 1.5em;
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--text-primary);
    font-style: italic;
}

/* Key takeaways / callout box */
.callout {
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    padding: 26px 28px;
    margin: 2em 0;
    position: relative;
}
.callout h4 {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--neon);
    margin-bottom: 14px;
}
.callout ul { margin-bottom: 0; }

/* ---------- Diagram figure ---------- */
.diagram-figure {
    margin: 2.4em 0;
    background:
        radial-gradient(ellipse 70% 90% at 50% 0%, rgba(88,245,160,0.05), transparent 70%),
        var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 30px 26px 20px;
    overflow: hidden;
}
.diagram-figure svg {
    width: 100%;
    height: auto;
    display: block;
    overflow: visible;
}
.diagram-caption {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    text-align: center;
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}
.diagram-caption b { color: var(--text-secondary); font-weight: 500; }

/* Shared SVG diagram primitives (use as classes on SVG elements) */
.dg-node { fill: var(--bg-card); stroke: var(--border-strong); stroke-width: 1.4; }
.dg-node-accent { fill: var(--neon-soft); stroke: var(--neon); stroke-width: 1.4; }
.dg-label { fill: var(--text-primary); font-family: var(--font-mono); font-size: 12px; }
.dg-sub { fill: var(--text-secondary); font-family: var(--font-mono); font-size: 10px; }
.dg-accent-text { fill: var(--neon); font-family: var(--font-mono); font-size: 12px; }
.dg-flow { stroke: var(--neon); stroke-width: 1.6; fill: none; }
.dg-flow-dim { stroke: var(--border-strong); stroke-width: 1.4; fill: none; }
.dg-title { fill: var(--text-muted); font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; }

/* Article footer nav */
.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}
.article-nav a {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--neon);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: gap 0.2s ease;
}
.article-nav a:hover { gap: 12px; }

/* Multi-link card actions (used on Talks cards) */
.card-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    margin-top: 4px;
}
.card-links .card-link { font-size: 0.76rem; }
.card-links .card-link::before {
    content: '';
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--neon);
    box-shadow: 0 0 8px var(--neon-glow);
    margin-right: 2px;
}

/* Tags */
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 26px 0 0; }
.tag-row .tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 5px 12px;
    background: var(--bg-card);
}

@media (max-width: 640px) {
    .article h1 { font-size: 1.9rem; }
    .diagram-figure { padding: 20px 14px 14px; }
}