/* ============================================================
   BLOG CSS — blog.css
   Shared by all blog_N.html files
   ============================================================ */

.blog-article { padding-bottom: var(--space-3xl); }

.blog-back {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--color-text-3);
  text-decoration: none;
  margin-bottom: var(--space-xl);
  margin-top: var(--space-xl);
  transition: color 0.2s;
}
.blog-back:hover { color: var(--color-accent); }

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

.blog-meta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.blog-title-main {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: 0.02em;
  line-height: 1.05;
  color: var(--color-text);
  margin-bottom: var(--space-xl);
  text-align: left;
}

.blog-byline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.blog-author-block {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.blog-author-photo {
  width: 44px; height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-accent);
  flex-shrink: 0;
}
.blog-author-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text);
}
.blog-author-role {
  font-size: 0.65rem;
  color: var(--color-text-3);
  letter-spacing: 0.08em;
  margin-top: 2px;
}
.blog-date-read {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--color-text-3);
  text-align: right;
}

/* ── Article Body ── */
.blog-body {
  max-width: 72ch;
  margin: 0 auto;
  padding: var(--space-2xl) 0;
}

.blog-lead {
  font-size: 1.12rem;
  line-height: 1.85;
  color: var(--color-text-2);
  margin-bottom: var(--space-2xl);
  text-align: justify;
  hyphens: auto;
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-lg);
}

.blog-body h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  text-align: left;
}

.blog-body p {
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--color-text-2);
  margin-bottom: var(--space-lg);
  text-align: justify;
  hyphens: auto;
  max-width: none;
}

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

/* Callout block */
.blog-callout {
  background: var(--color-accent-dim);
  border: 1px solid var(--color-border-bright);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
}
.blog-callout-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}
.blog-callout p {
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 0;
}

/* Author footer */
.blog-author-footer {
  display: flex;
  gap: var(--space-xl);
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-xl);
  margin-top: var(--space-2xl);
}
.blog-author-photo-lg {
  width: 72px; height: 72px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-accent);
  flex-shrink: 0;
}

/* Nav between posts */
.blog-nav-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-xl);
}

/* Footer shared */
.footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  position: relative;
  z-index: 1;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}
.footer-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--color-text-3);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-link:hover { color: var(--color-accent); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .blog-body { padding: var(--space-xl) 0; }
  .blog-byline { flex-direction: column; align-items: flex-start; }
  .blog-date-read { text-align: left; }
  .blog-author-footer { flex-direction: column; }
  .blog-nav-row { flex-direction: column; }
  .blog-nav-row .btn { width: 100%; justify-content: center; }
}
@media (max-width: 480px) {
  .blog-title-main { font-size: 1.8rem; }
  .blog-lead { font-size: 1rem; }
  .blog-callout { padding: var(--space-md); }
}

/* ══════════════════════════════════════════════════
   BLOG IMAGE COMPONENTS
   Usage guide for each component is in the comment
   above its selector.
   ══════════════════════════════════════════════════ */

/*
  Full-width hero image (below the article header, before body text)
  Usage: <figure class="blog-hero-image"> <img src="..." alt="..." /> <figcaption>Caption</figcaption> </figure>
*/
.blog-hero-image {
  width: 100%;
  margin: 0 0 var(--space-2xl) 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.blog-hero-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--ease-snap);
}
.blog-hero-image:hover img { transform: scale(1.02); }
.blog-hero-image figcaption {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--color-text-3);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  text-align: left;
}

/*
  Inline body image — full width within the article text flow
  Usage: <figure class="blog-image"> <img src="..." alt="..." /> <figcaption>Caption</figcaption> </figure>
*/
.blog-image {
  margin: var(--space-xl) 0;
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.blog-image img {
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s var(--ease-snap);
}
.blog-image:hover img { transform: scale(1.015); }
.blog-image figcaption {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--color-text-3);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  text-align: left;
}

/*
  Side-by-side image pair
  Usage:
  <div class="blog-image-pair">
    <figure class="blog-image-pair-item"> <img src="..." alt="..." /> <figcaption>Left</figcaption> </figure>
    <figure class="blog-image-pair-item"> <img src="..." alt="..." /> <figcaption>Right</figcaption> </figure>
  </div>
*/
.blog-image-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin: var(--space-xl) 0;
}
.blog-image-pair-item {
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.blog-image-pair-item img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s var(--ease-snap);
}
.blog-image-pair-item:hover img { transform: scale(1.03); }
.blog-image-pair-item figcaption {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--color-text-3);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  text-align: left;
}

/*
  Float image right (text wraps around it)
  Usage: <figure class="blog-image-float-right"> <img src="..." alt="..." /> <figcaption>Caption</figcaption> </figure>
*/
.blog-image-float-right {
  float: right;
  width: 40%;
  min-width: 220px;
  max-width: 340px;
  margin: 0 0 var(--space-lg) var(--space-xl);
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.blog-image-float-right img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}
.blog-image-float-right figcaption {
  padding: var(--space-sm) var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: var(--color-text-3);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  text-align: left;
}
.blog-body::after { content: ''; display: table; clear: both; }

/*
  Data chart / diagram image with amber accent border
  Usage: <figure class="blog-image-data"> <img src="..." alt="..." /> <figcaption>Source: ...</figcaption> </figure>
*/
.blog-image-data {
  margin: var(--space-xl) 0;
  border: 1px solid var(--color-border-bright);
  border-top: 3px solid var(--color-accent);
  overflow: hidden;
  background: var(--color-surface);
}
.blog-image-data img {
  width: 100%;
  height: auto;
  display: block;
  padding: var(--space-md);
  box-sizing: border-box;
}
.blog-image-data figcaption {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  border-top: 1px solid var(--color-border);
  text-align: left;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .blog-image-pair { grid-template-columns: 1fr; }
  .blog-image-float-right {
    float: none;
    width: 100%;
    max-width: 100%;
    margin: var(--space-lg) 0;
  }
  .blog-hero-image img { height: 240px; }
  .blog-image img { max-height: 300px; }
}