/* ===== Article single page styles ===== */

.article-single { padding-bottom: 5rem; }

/* ===== Article hero ===== */
.article-hero {
  position: relative;
  background-color: var(--teal-dark);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--white);
  padding: 4rem 0 3.5rem;
  min-height: 24rem;
  display: flex;
  align-items: center;
}
.article-hero .breadcrumb__list,
.article-hero .breadcrumb__item a {
  color: rgba(255,255,255,0.85);
}
.article-hero .breadcrumb__item:not(:last-child)::after { color: rgba(255,255,255,0.5); }
.article-hero .breadcrumb__item a { text-decoration: none; }

.article-hero__category {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  background: var(--terracotta);
  color: var(--white);
  padding: 0.375rem 0.875rem;
  border-radius: 9999px;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.article-hero__title {
  color: var(--white);
  font-size: clamp(1.875rem, 4.5vw, 2.875rem);
  line-height: 1.4;
  margin-bottom: 1rem;
  max-width: 50rem;
}
.article-hero__subtitle {
  font-size: 1rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 0.75rem;
  font-family: var(--font-serif);
}
.article-hero__excerpt {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.85);
  max-width: 44rem;
  margin-bottom: 1.5rem;
}
.article-hero__meta {
  display: flex;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.75);
}

/* ===== Article layout ===== */
.article-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 4rem;
  margin-top: 3rem;
}

/* ===== Table of contents ===== */
.article-toc {
  position: sticky;
  top: 5rem;
  align-self: start;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  font-size: 0.8125rem;
}
.article-toc__title {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-family: var(--font-sans);
}
.article-toc__nav ul {
  border-left: 2px solid var(--border);
  padding-left: 1rem;
}
.article-toc__nav li { margin-bottom: 0.625rem; }
.article-toc__nav a {
  display: block;
  color: var(--text-muted);
  line-height: 1.5;
  font-size: 0.8125rem;
  transition: color var(--transition);
}
.article-toc__nav a:hover,
.article-toc__nav a.is-active {
  color: var(--teal);
  font-weight: 700;
}

/* ===== Article body ===== */
.article-body {
  font-size: 1rem;
  line-height: 2;
  max-width: 44rem;
}
.article-body h2 {
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  margin-top: 3rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--terracotta);
  display: inline-block;
}
.article-body h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}
.article-body p { margin-bottom: 1.5rem; }
.article-body a {
  color: var(--teal);
  text-decoration: underline;
  text-decoration-color: var(--terracotta);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.article-body a:hover { color: var(--terracotta); }
.article-body strong { font-weight: 700; color: var(--teal); }
.article-body ul, .article-body ol { margin: 1rem 0 1.5rem 1.5rem; }
.article-body ul li, .article-body ol li { margin-bottom: 0.5rem; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body blockquote {
  border-left: 4px solid var(--terracotta);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  background: var(--warm-grey-dark);
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--text-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.article-body blockquote cite {
  display: block;
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-style: normal;
  font-family: var(--font-sans);
}
.article-body figure {
  margin: 2rem 0;
}
.article-body figure img {
  border-radius: var(--radius);
}
.article-body figure figcaption {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  text-align: center;
  line-height: 1.6;
}
.article-body table {
  margin: 2rem 0;
  font-size: 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.article-body table th {
  background: var(--teal);
  color: var(--white);
  padding: 0.75rem 1rem;
  font-weight: 700;
  text-align: left;
}
.article-body table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-light);
}
.article-body table tr:nth-child(even) td { background: var(--warm-grey); }

.article-body .stat-card { margin: 1.5rem 0; }

.article-body .chart-container {
  position: relative;
  height: 320px;
  max-width: 640px;
  margin: 2rem auto;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 3rem 0 0;
}

/* ===== responsive ===== */
@media (max-width: 960px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .article-toc {
    position: static;
    max-height: none;
    padding: 1.25rem;
    background: var(--warm-grey-dark);
    border-radius: var(--radius);
  }
}
@media (max-width: 720px) {
  .article-hero { padding: 3rem 0; }
}