/* ==============================================
   ARTICLE.CSS — shared by all blog posts
   Loaded alongside base.css
   ============================================== */

:root {
  --mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

/* ARTICLE HEADER */
.article-header {
  background: var(--cream-dark);
  border-bottom: 1px solid var(--rule);
}

.article-header-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 8rem 2rem 3.5rem;
}

.article-header .post-meta {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--sepia);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.article-header h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

.article-header .post-subtitle {
  font-family: var(--serif);
  font-style: italic;
  color: var(--charcoal-mid);
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.7;
  max-width: 560px;
}

/* POST TAGS */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.post-tags span {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--sepia);
  background: rgba(139, 115, 85, 0.1);
  padding: 0.25rem 0.7rem;
  border-radius: 4px;
  letter-spacing: 0.04em;
}

/* ARTICLE BODY */
.article-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 2rem 6rem;
}

.article-body p {
  color: var(--charcoal-mid);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  line-height: 1.85;
}

.article-body a {
  color: var(--sepia);
  text-decoration: underline;
  text-decoration-color: var(--sepia-light);
  text-underline-offset: 0.15em;
  transition: color 0.2s;
}

.article-body a:hover {
  color: var(--charcoal);
}

.article-body h2 {
  font-family: var(--serif);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--charcoal);
  margin-top: 3rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}

.article-body h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--charcoal);
  margin-top: 2.25rem;
  margin-bottom: 1rem;
}

.article-body h4 {
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--charcoal-mid);
  letter-spacing: 0.03em;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

/* INLINE CODE */
.article-body code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: rgba(139, 115, 85, 0.08);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--charcoal);
}

/* CODE BLOCKS */
.article-body pre {
  background: var(--charcoal);
  color: #e0ddd5;
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.75rem;
  overflow-x: auto;
  line-height: 1.6;
}

.article-body pre code {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: none;
  padding: 0;
  color: inherit;
  border-radius: 0;
}

.code-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--charcoal-light);
  margin-bottom: 0.5rem;
  letter-spacing: 0.03em;
}

/* Syntax colors (minimal, warm palette) */
.kw { color: #d4a574; }
.fn { color: #c9b89a; }
.st { color: #a8c490; }
.cm { color: #6b6b6b; }
.nu { color: #d4a574; }
.op { color: #b5a48a; }
.bi { color: #c9b89a; }

/* BLOCKQUOTE */
.article-body blockquote {
  border-left: 2px solid var(--sepia-light);
  padding: 1rem 0 1rem 1.75rem;
  margin: 2rem 0;
  background: rgba(139, 115, 85, 0.04);
  border-radius: 0 6px 6px 0;
}

.article-body blockquote p {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--charcoal-mid);
  margin-bottom: 0.5rem;
  line-height: 1.75;
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body blockquote cite {
  font-family: var(--sans);
  font-style: normal;
  font-size: 0.8rem;
  color: var(--sepia);
  display: block;
  margin-top: 0.5rem;
}

.article-body blockquote cite a {
  color: var(--sepia);
  font-size: 0.8rem;
}

/* LISTS */
.article-body ul, .article-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.article-body li {
  color: var(--charcoal-mid);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  line-height: 1.75;
}

.article-body li code {
  font-size: 0.83em;
}

/* IMAGES */
.article-body figure {
  margin: 2.5rem 0;
}

.article-body figure img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  display: block;
  margin: 0 auto;
  border: 1px solid var(--rule);
}

.article-body figcaption {
  font-size: 0.8rem;
  color: var(--charcoal-light);
  text-align: center;
  margin-top: 0.75rem;
  font-style: italic;
}

.article-body figcaption a {
  font-size: 0.8rem;
}

/* MATH */
.article-body .katex-display {
  margin: 1.75rem 0;
  overflow-x: auto;
  padding: 0.5rem 0;
}

/* HORIZONTAL RULE */
.article-body hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 3rem 0;
}

/* REFERENCES */
.references {
  margin-top: 1rem;
}

.references a {
  display: block;
  font-size: 0.85rem;
  color: var(--sepia);
  word-break: break-all;
  margin-bottom: 0.35rem;
  line-height: 1.6;
}

/* BACK LINK */
.back-link {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--sepia);
  text-decoration: none;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--charcoal);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .article-header-inner {
    padding: 6.5rem 1.5rem 2.5rem;
  }

  .article-body {
    padding: 2rem 1.5rem 4rem;
  }

  .article-body pre {
    border-radius: 0;
    margin-left: -1.5rem;
    margin-right: -1.5rem;
    padding: 1.25rem 1.5rem;
  }

  .article-body figure {
    margin-left: -1.5rem;
    margin-right: -1.5rem;
  }

  .article-body figure img {
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
}