/* ============================================================================
   Clusterra blog — 2026 theme
   Companion to styles-2026.css. Adds article + listing styles.
   Reference: Vercel blog, Linear changelog, Modal posts — quiet editorial.
   ============================================================================ */

/* ---------- Blog listing (index.html) ---------- */
.blog-hero {
    padding: 6rem 0 3rem;
    position: relative;
    overflow: hidden;
}

.blog-hero .hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.035) 1px, transparent 0);
    background-size: 32px 32px;
    mask-image: linear-gradient(180deg, black 0%, black 50%, transparent 100%);
    -webkit-mask-image: linear-gradient(180deg, black 0%, black 50%, transparent 100%);
    pointer-events: none;
}

.blog-hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
}

.blog-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 5vw, 3.5rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--text);
    line-height: 1.08;
    margin-bottom: 1rem;
}

.blog-hero h1 em {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
    color: var(--accent);
}

.blog-hero-lede {
    color: var(--text-2);
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 60ch;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 0 5rem;
}

@media (max-width: 1000px) {
    .blog-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .blog-grid { grid-template-columns: 1fr; }
}

.blog-card {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 1.75rem;
    transition: border-color var(--t-base), transform var(--t-base);
    color: inherit;
    text-decoration: none;
}

.blog-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.blog-card:hover .blog-read-more {
    color: var(--accent-hover);
}

.blog-card-content {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    height: 100%;
}

.blog-meta {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    letter-spacing: 0.05em;
    color: var(--text-3);
}

.blog-card-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: -0.015em;
    color: var(--text);
    line-height: 1.25;
    margin: 0;
}

.blog-card-summary {
    color: var(--text-2);
    font-size: 0.96rem;
    line-height: 1.55;
    margin: 0;
    flex: 1;
}

.blog-read-more {
    display: inline-block;
    margin-top: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    transition: color var(--t-fast);
}

/* ---------- Blog post (article page) ---------- */
.blog-post {
    max-width: 720px;
    margin: 0 auto;
    padding: 4rem 0 5rem;
}

.blog-post-header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.blog-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--text);
    margin: 0.6rem 0 1rem;
}

.blog-summary {
    color: var(--text-2);
    font-size: 1.15rem;
    line-height: 1.55;
    margin: 0;
}

/* ---------- Article body typography ---------- */
.blog-content {
    font-family: var(--font-body);
    font-size: 1.06rem;
    line-height: 1.75;
    color: var(--text);
}

.blog-content > * + * { margin-top: 1.25rem; }
.blog-content > h2 + *,
.blog-content > h3 + * { margin-top: 0.75rem; }

.blog-content h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--text);
    margin-top: 2.75rem;
    margin-bottom: 0.75rem;
}

.blog-content h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: -0.015em;
    line-height: 1.3;
    color: var(--text);
    margin-top: 2rem;
}

.blog-content h4 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    margin-top: 1.75rem;
}

.blog-content p {
    color: var(--text);
}

.blog-content p strong {
    color: var(--text);
    font-weight: 600;
}

.blog-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(61, 219, 217, 0.35);
    transition: border-color var(--t-fast), color var(--t-fast);
}

.blog-content a:hover {
    color: var(--accent-hover);
    border-bottom-color: var(--accent);
}

.blog-content ul,
.blog-content ol {
    padding-left: 1.25rem;
    color: var(--text);
}

.blog-content li {
    margin: 0.4rem 0;
    line-height: 1.7;
}

.blog-content li::marker { color: var(--text-3); }

.blog-content hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

.blog-content blockquote {
    border-left: 2px solid var(--accent);
    padding: 0.25rem 0 0.25rem 1.25rem;
    color: var(--text-2);
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.15rem;
    line-height: 1.6;
    margin-left: 0;
}

.blog-content code {
    font-family: var(--font-mono);
    font-size: 0.88em;
    color: var(--text);
    background: var(--surface-2);
    padding: 0.1em 0.4em;
    border-radius: 4px;
    border: 1px solid var(--border);
}

.blog-content pre {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 1.25rem 1.4rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.88rem;
    line-height: 1.65;
    color: var(--text-2);
}

.blog-content pre code {
    background: transparent;
    border: 0;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

.blog-content img,
.blog-content svg {
    max-width: 100%;
    height: auto;
    border-radius: var(--r-md);
    border: 1px solid var(--border);
    display: block;
    margin: 1.75rem auto;
}

.blog-content table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
    margin: 1.5rem 0;
}

.blog-content thead th {
    text-align: left;
    padding: 0.7rem 0.9rem;
    background: var(--surface-2);
    border-bottom: 1px solid var(--border);
    font-size: 0.74rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-3);
    font-weight: 500;
}

.blog-content tbody td {
    padding: 0.7rem 0.9rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-2);
}

.blog-content tbody td:first-child { color: var(--text); }

.blog-content em {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.02em;
    color: var(--text-2);
}

/* ---------- Article footer nav ---------- */
.blog-footer-nav {
    margin-top: 3.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1.1rem;
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--text);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    text-decoration: none;
    transition: border-color var(--t-fast), background var(--t-fast);
}

.btn-back:hover {
    border-color: var(--border-hover);
    background: var(--surface-2);
}