/* ===================================================================
   blog.css — /blog (index) and /blog/<slug> (post.php)
   Extends the base blog/post rules in app.css.
   Colors come only from tokens.css variables.
   =================================================================== */

:root {
    --blog-ink: color-mix(in srgb, var(--foreground) 88%, var(--primary));
    --blog-ink-fg: var(--background);
    --blog-ink-muted: color-mix(in srgb, var(--background) 72%, transparent);
    --blog-ink-line: color-mix(in srgb, var(--background) 16%, transparent);
}
.dark {
    --blog-ink: color-mix(in srgb, var(--card) 70%, var(--accent));
    --blog-ink-fg: var(--foreground);
    --blog-ink-muted: var(--muted-foreground);
    --blog-ink-line: color-mix(in srgb, var(--foreground) 10%, transparent);
}

main.container .container:not(.container--narrow) {
    padding-left: 0;
    padding-right: 0;
}

/* ---------- Blog index head ---------- */
.page-head {
    position: relative;
    isolation: isolate;
    padding: clamp(44px, 8vw, 84px) 0 clamp(16px, 3vw, 28px);
    text-align: center;
}
.page-head::before {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 0;
    background:
        radial-gradient(40% 60% at 30% 10%, color-mix(in srgb, var(--primary) 15%, transparent), transparent 70%),
        radial-gradient(35% 50% at 75% 25%, color-mix(in srgb, var(--brand-cyan) 10%, transparent), transparent 70%);
    pointer-events: none;
}
.page-head .section__head { margin-bottom: 24px; }
.page-head .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 5px 12px 5px 10px;
    margin-bottom: 18px;
    border: 1px solid color-mix(in srgb, var(--primary) 28%, var(--border));
    border-radius: var(--radius-pill);
    background: color-mix(in srgb, var(--primary) 8%, var(--card));
}
.page-head .eyebrow::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--brand-gradient);
}
.page-head h1 {
    font-family: var(--font-serif);
    font-size: clamp(2.1rem, 5.6vw, 3.3rem);
    line-height: 1.08;
    margin-bottom: 14px;
    text-wrap: balance;
}
.section__lead {
    max-width: 620px;
    margin: 0 auto !important;
    color: var(--muted-foreground);
    font-size: clamp(1.02rem, 2.2vw, 1.14rem) !important;
}

.blog-topics {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}
.blog-topics a {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    padding: 0 16px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--muted-foreground);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.15s var(--ease), border-color 0.15s var(--ease), background 0.15s var(--ease);
}
.blog-topics a:hover {
    color: var(--primary);
    border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
    background: color-mix(in srgb, var(--primary) 6%, var(--card));
}

/* ---------- Blog cards ---------- */
.blog-grid { gap: 22px; }
.blog-card { position: relative; }
.blog-card__media { position: relative; }
.blog-card__media img { transition: transform 0.5s var(--ease); }
.blog-card:hover .blog-card__media img { transform: scale(1.04); }
.blog-card:not(:has(.blog-card__media))::before {
    content: "";
    display: block;
    height: 4px;
    background: var(--brand-gradient);
}
.blog-card__meta {
    display: flex;
    align-items: center;
    gap: 8px;
}
.blog-card__date {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.blog-card__date::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--brand-gradient);
}
.blog-card__title { font-family: var(--font-serif); font-weight: 600; text-wrap: balance; }
.blog-card__title a::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
}
.blog-card__more {
    position: relative;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    width: fit-content;
}
.arrow {
    display: inline-block;
    transition: transform 0.2s var(--ease);
}
.blog-card:hover .arrow,
.blog-card__more:hover .arrow { transform: translateX(4px); }

.section--tight > .container > .empty {
    max-width: var(--container-narrow);
    margin: 0 auto;
    background: color-mix(in srgb, var(--card) 60%, transparent);
}

/* ---------- Reading progress ---------- */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 70;
    height: 3px;
    background: transparent;
    pointer-events: none;
}
.reading-progress__bar {
    width: 0;
    height: 100%;
    background: var(--brand-gradient);
    box-shadow: 0 0 10px color-mix(in srgb, var(--primary) 60%, transparent);
    transition: width 0.08s linear;
}

/* ---------- Post ---------- */
.post .breadcrumb { margin-bottom: 26px; }
.post .breadcrumb a { text-decoration: none; }
.post__head { margin-bottom: 28px; }
.post__title {
    font-family: var(--font-serif);
    font-weight: 600;
    letter-spacing: -0.025em;
    text-wrap: balance;
}
.post__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 10px;
    font-size: 0.9rem;
}
/* app.css styles .dot as a legend swatch; reset it for the meta separator */
.post__meta .dot {
    display: inline;
    width: auto;
    height: auto;
    border-radius: 0;
    background: none;
    color: var(--border);
}
.post__readtime {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.post__readtime svg { width: 14px; height: 14px; }
.post__cover {
    box-shadow: var(--shadow-lg);
    border-radius: calc(var(--radius) + 4px);
}

/* body + floating TOC */
.post__shell {
    display: flex;
    flex-direction: column;
}
.post__body {
    font-size: 1.06rem;
    min-width: 0;
    overflow-wrap: break-word;
}
.post__body > :first-child { margin-top: 0; }
.post__body h2,
.post__body h3 {
    position: relative;
    font-family: var(--font-serif);
    scroll-margin-top: 92px;
}
.post__body h2 { font-size: clamp(1.4rem, 3vw, 1.7rem); }
.post__body a:not(.anchor) {
    text-decoration: underline;
    text-decoration-color: color-mix(in srgb, var(--primary) 40%, transparent);
    text-underline-offset: 3px;
}
.post__body a:not(.anchor):hover { text-decoration-color: var(--primary); }
.anchor {
    margin-left: 0.35em;
    color: var(--muted-foreground);
    font-family: var(--font-sans);
    font-weight: 500;
    opacity: 0;
    text-decoration: none;
    transition: opacity 0.15s var(--ease), color 0.15s var(--ease);
}
.post__body h2:hover .anchor,
.post__body h3:hover .anchor,
.anchor:focus-visible { opacity: 1; }
.anchor:hover { color: var(--primary); }
.post__body blockquote {
    margin: 1.4em 0;
    padding: 14px 20px;
    border-left: 3px solid var(--primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: color-mix(in srgb, var(--primary) 6%, var(--card));
    color: var(--foreground);
}
.post__body blockquote p:last-child { margin-bottom: 0; }
.post__body img {
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin: 1.4em 0;
}
.post__body hr {
    border: 0;
    height: 1px;
    margin: 2.4em 0;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.post__body table {
    display: block;
    width: 100%;
    overflow-x: auto;
    border-collapse: collapse;
    margin: 0 0 1.4em;
    font-size: 0.94rem;
}
.post__body th,
.post__body td {
    padding: 10px 14px;
    border: 1px solid var(--border);
    text-align: left;
}
.post__body th { background: var(--secondary); font-weight: 600; }
.post__body pre {
    background: color-mix(in srgb, var(--foreground) 94%, var(--primary));
    color: var(--background);
    border-color: transparent;
    line-height: 1.7;
    box-shadow: var(--shadow-md);
}
.dark .post__body pre {
    background: color-mix(in srgb, var(--background) 80%, var(--card));
    color: var(--foreground);
    border-color: var(--border);
}

.post__toc {
    order: -1;
    margin: 0 0 28px;
}
.post__toc-inner {
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
}
.post__toc-title {
    margin: 0 0 10px;
    color: var(--muted-foreground);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: var(--tracking-kicker);
    text-transform: uppercase;
}
.post__toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
    border-left: 1px solid var(--border);
}
.post__toc li a {
    display: block;
    margin-left: -1px;
    padding: 5px 0 5px 14px;
    border-left: 2px solid transparent;
    color: var(--muted-foreground);
    font-size: 0.88rem;
    line-height: 1.45;
    transition: color 0.15s var(--ease), border-color 0.15s var(--ease);
}
.post__toc li.is-sub a { padding-left: 26px; font-size: 0.84rem; }
.post__toc li a:hover { color: var(--foreground); }
.post__toc li a.is-active {
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 600;
}

@media (min-width: 1280px) {
    .post__shell {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 210px;
        column-gap: 40px;
        align-items: start;
        margin-right: -250px;
    }
    .post__toc {
        order: 0;
        position: sticky;
        top: 92px;
        margin: 0;
    }
    .post__toc-inner {
        padding: 4px 0 4px;
        border: 0;
        background: none;
    }
}

/* ---------- Share ---------- */
.post__share {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin: 40px 0 8px;
    padding: 18px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.post__share-label {
    margin-right: auto;
    color: var(--muted-foreground);
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.share-btn {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--card);
    color: var(--foreground);
    cursor: pointer;
    transition: color 0.15s var(--ease), border-color 0.15s var(--ease), background 0.15s var(--ease), transform 0.15s var(--ease);
}
.share-btn svg { width: 16px; height: 16px; }
.share-btn:hover {
    color: var(--primary);
    border-color: color-mix(in srgb, var(--primary) 45%, var(--border));
    background: color-mix(in srgb, var(--primary) 6%, var(--card));
    transform: translateY(-2px);
}
.share-btn--copy.is-copied {
    color: var(--success);
    background: color-mix(in srgb, var(--success) 10%, var(--card));
}

/* ---------- Related ---------- */
.related { margin-top: 44px; }
.related__title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: 16px;
}
.related__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    gap: 14px;
}
.related__card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 18px 20px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.15s var(--ease), transform 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.related__card:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
    box-shadow: var(--shadow-md);
}
.related__date { color: var(--muted-foreground); font-family: var(--font-mono); font-size: 0.78rem; }
.related__card-title { margin: 0; font-size: 1.02rem; line-height: 1.4; }
.related__card-title a { color: var(--foreground); }
.related__card-title a::after { content: ""; position: absolute; inset: 0; }
.related__card:hover .related__card-title a { color: var(--primary); }
.related__excerpt {
    margin: 0;
    color: var(--muted-foreground);
    font-size: 0.9rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ---------- CTA band (shared look with landing pages) ---------- */
.cta-band {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    padding: clamp(36px, 6vw, 60px) clamp(22px, 5vw, 48px);
    border-radius: calc(var(--radius) + 8px);
    border: 1px solid var(--blog-ink-line);
    background:
        radial-gradient(60% 90% at 0% 0%, color-mix(in srgb, var(--primary) 45%, transparent), transparent 65%),
        radial-gradient(50% 80% at 100% 100%, color-mix(in srgb, var(--brand-gold) 26%, transparent), transparent 65%),
        var(--blog-ink);
    color: var(--blog-ink-fg);
    box-shadow: var(--shadow-lg);
}
.cta-band h2 { color: var(--blog-ink-fg); text-wrap: balance; margin-bottom: 20px; }
.cta-band p { color: var(--blog-ink-muted); opacity: 1; }
.post__cta { margin: 44px 0 20px; }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
    .post__body { font-size: 1rem; }
    .post__share-label { flex-basis: 100%; margin: 0 0 4px; }
    .cta-band .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    .reading-progress__bar,
    .blog-card__media img,
    .arrow,
    .share-btn,
    .related__card { transition: none; }
    .blog-card:hover .blog-card__media img { transform: none; }
}