/* ============================================================
   Blog — listing and article pages
   Reuses the global token system (midnight-indigo canvas,
   terracotta primary / teal secondary, Berkeley Mono display).
   ============================================================ */

:root {
    /* Long-form body text sits between --ivory and --muted for
       comfortable reading on the dark canvas */
    --prose: #C9CFDF;
}

/* ---------- Shared page shell ---------- */

.blog-main {
    padding-top: var(--banner-h);
    min-height: 70vh;
}

/* ---------- Blog index: post list ---------- */

.post-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    max-width: 860px;
    margin: 3rem 0 0;
}

.post-card {
    display: block;
    padding: 1.6rem 1.8rem;
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: border-color 0.2s ease, transform 0.15s ease;
}
.post-card:hover {
    text-decoration: none;
    border-color: rgba(230, 119, 72, 0.55);
    transform: translateY(-2px);
}

.post-card-meta {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 0.5rem;
}
.post-card-meta .post-topic { color: var(--teal-bright); }

.post-card-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--ivory);
    margin: 0 0 0.55rem;
}
.post-card:hover .post-card-title { color: var(--terra-soft); }

.post-card-excerpt {
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.65;
    margin: 0;
    max-width: 68ch;
}

/* ---------- Article page ---------- */

.post {
    padding-left: var(--pad-x);
    padding-right: var(--pad-x);
    padding-bottom: 2rem;
}
.post-head, .post .prose { max-width: 760px; }

.post-head { padding-top: clamp(3rem, 7vw, 5.5rem); }

.post-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.7rem, 3.6vw, 2.6rem);
    line-height: 1.18;
    letter-spacing: -0.03em;
    color: var(--ivory);
    margin: 0 0 1rem;
}
.post-title em { font-style: italic; color: var(--terra-soft); }

.post-meta {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 2.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    align-items: center;
}
.post-meta .meta-sep { color: var(--line-strong); }

/* ---------- Prose ---------- */

.prose {
    color: var(--prose);
    font-size: 1.02rem;
    line-height: 1.75;
}

.prose p { margin: 0 0 1.35rem; }

.prose h2 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.45rem;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--ivory);
    margin: 2.8rem 0 1rem;
    padding-top: 1.6rem;
    border-top: 1px solid var(--line);
}

.prose h3 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.01em;
    color: var(--ivory);
    margin: 2rem 0 0.8rem;
}

.prose strong { color: var(--ivory); }

.prose ul, .prose ol { margin: 0 0 1.35rem; padding-left: 1.4rem; }
.prose li { margin-bottom: 0.45rem; }
.prose li::marker { color: var(--terra); }

.prose blockquote {
    margin: 0 0 1.35rem;
    padding: 0.2rem 0 0.2rem 1.2rem;
    border-left: 2px solid var(--teal);
    color: var(--muted);
    font-style: italic;
}

.prose hr {
    border: none;
    border-top: 1px solid var(--line);
    margin: 2.5rem 0;
}

/* Inline code */
.prose code {
    font-family: var(--font-mono);
    font-size: 0.86em;
    background: rgba(243, 239, 228, 0.07);
    border: 1px solid var(--line);
    border-radius: 5px;
    padding: 0.08em 0.35em;
    color: var(--ivory);
    white-space: nowrap;
}

/* Code blocks */
.prose pre {
    position: relative;
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 1.1rem 1.2rem;
    margin: 0 0 1.35rem;
    overflow-x: auto;
}
.prose pre code {
    background: none;
    border: none;
    padding: 0;
    white-space: pre;
    font-size: 0.84rem;
    line-height: 1.6;
    color: var(--prose);
    display: block;
}

/* Language tag on code blocks, e.g. <pre data-lang="python"> */
.prose pre[data-lang]::before {
    content: attr(data-lang);
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
    opacity: 0.8;
    pointer-events: none;
}

/* Copy button injected by blog.js */
.copy-btn {
    position: absolute;
    bottom: 0.55rem;
    right: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 0.25rem 0.55rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.prose pre:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--terra-soft); border-color: var(--terra); }

/* Tables */
.prose .table-wrap { overflow-x: auto; margin: 0 0 1.35rem; }
.prose table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.92rem;
}
.prose th, .prose td {
    text-align: left;
    padding: 0.55rem 0.9rem;
    border-bottom: 1px solid var(--line);
}
.prose th {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}
.prose td code { white-space: nowrap; }

/* Callout note */
.prose .note {
    background: rgba(60, 136, 168, 0.1);
    border: 1px solid rgba(60, 136, 168, 0.35);
    border-radius: var(--radius-sm);
    padding: 0.9rem 1.2rem;
    margin: 0 0 1.35rem;
}
.prose .note p { margin: 0; }
.prose .note p + p { margin-top: 0.6rem; }

/* ---------- Post footer: CTA + back link ---------- */

.post-cta {
    margin-top: 3rem;
    padding: 1.6rem 1.8rem;
    background: var(--bg-1);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.post-cta p {
    margin: 0 0 1rem;
    color: var(--muted);
}
.post-cta p strong { color: var(--ivory); }

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 2.2rem;
}
.back-link:hover { color: var(--terra-soft); text-decoration: none; }
.back-link::before { content: "\2190"; }

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
    .prose { font-size: 0.98rem; }
    .prose pre { padding: 0.9rem 0.9rem; }
    .post-card { padding: 1.3rem 1.3rem; }
}