/* ============================================================
   BLOG – Article hub + single-post prose styles
   Style: on.energy – high-contrast black/white, industrial
   Linked only on /blog/ pages (in addition to styles.css)
   ============================================================ */

/* ---- Blog index: featured post ---- */
.blog-featured-meta {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.breadcrumb a { color: var(--muted-lt); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb span { color: var(--border-lt); }

/* ============================================================
   SINGLE ARTICLE
   ============================================================ */

/* Centered reading column */
.article-shell {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 2.5rem;
}

.article-header { padding: 130px 0 2.5rem; }
.article-header .article-cat {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-lt);
  margin-bottom: 1.25rem;
  display: block;
}
.article-header h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.05;
  margin-bottom: 1.5rem;
}
.article-byline {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--muted-lt);
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}
.article-byline strong { color: var(--white); font-weight: 600; }
.article-byline .dot { color: var(--border-lt); }

/* Hero image */
.article-hero-image {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: #050505;
  margin-bottom: 3.5rem;
}
.article-hero-image img {
  display: block;
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  filter: grayscale(1) contrast(1.05);
}
.article-hero-image figcaption {
  padding: 0.75rem 2.5rem;
  max-width: 760px;
  margin: 0 auto;
  font-size: 0.68rem;
  color: var(--muted);
}
.article-hero-image figcaption a { color: var(--muted); text-decoration: underline; }

/* Prose body */
.article-body { padding-bottom: 4rem; }
.article-body > * { margin-bottom: 1.5rem; }
.article-body p {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--light-gray);
}
.article-body .lead {
  font-size: 1.25rem;
  line-height: 1.65;
  color: var(--white);
  font-weight: 500;
}
.article-body h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-top: 3.5rem;
  margin-bottom: 1.25rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  letter-spacing: -0.02em;
}
.article-body h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--white);
}
.article-body a {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border-lt);
  transition: text-decoration-color var(--transition);
}
.article-body a:hover { text-decoration-color: var(--white); }

.article-body ul,
.article-body ol { padding-left: 1.5rem; }
.article-body li {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--light-gray);
  margin-bottom: 0.6rem;
  padding-left: 0.4rem;
}
.article-body ul li { list-style: none; position: relative; }
.article-body ul li::before {
  content: "";
  position: absolute;
  left: -1.1rem;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background: var(--muted-lt);
}
.article-body ol { list-style: decimal; }
.article-body ol li::marker { color: var(--muted); font-weight: 700; }

.article-body blockquote {
  border-left: 3px solid var(--white);
  padding: 0.5rem 0 0.5rem 2rem;
  margin: 2.5rem 0;
  font-size: 1.35rem;
  line-height: 1.5;
  font-weight: 500;
  color: var(--white);
  letter-spacing: -0.01em;
}

.article-body strong { color: var(--white); font-weight: 600; }

/* Data / comparison table */
.article-table-wrap { overflow-x: auto; margin: 2.5rem 0; }
.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 480px;
}
.article-body th,
.article-body td {
  text-align: left;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
}
.article-body thead th {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-lt);
  border-bottom: 1px solid var(--border-lt);
  background: var(--dark-gray);
}
.article-body tbody td { color: var(--light-gray); }
.article-body tbody td:first-child { color: var(--white); font-weight: 500; }

/* Callout box */
.article-callout {
  background: var(--dark-gray);
  border: 1px solid var(--border);
  border-left: 3px solid var(--white);
  padding: 1.75rem 2rem;
  margin: 2.5rem 0;
}
.article-callout p { margin: 0; font-size: 0.95rem; color: var(--muted-lt); line-height: 1.7; }
.article-callout p:first-child { color: var(--white); font-weight: 600; margin-bottom: 0.5rem; }

/* Article footer / back link + related */
.article-end {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.article-back {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-lt);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap var(--transition), color var(--transition);
}
.article-back:hover { color: var(--white); gap: 0.9rem; }

@media (max-width: 768px) {
  .article-shell { padding: 0 1.5rem; }
  .article-header { padding: 110px 0 2rem; }
  .article-hero-image figcaption { padding: 0.75rem 1.5rem; }
}