/* article.css -- Styles for article pages and article index */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--color-bg-page);
  color: var(--color-text-default);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Nav ── */
.article-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  width: 100%;
  margin: 0 auto;
  padding: 1rem 1.5rem;
}

.article-nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: 700;
  font-size: 1.15rem;
}

.article-nav-brand img {
  width: 32px;
  height: 32px;
}

.article-nav-tagline {
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-left: 0.25rem;
}

.article-nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

.article-nav-links a {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s;
}

.article-nav-links a:hover {
  color: var(--color-accent-teal);
}

/* ── Article Container ── */
.article-container {
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  flex: 1;
}

/* ── Article Header ── */
.article-header {
  margin-bottom: 2.5rem;
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-text-primary);
  margin-bottom: 0.75rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.article-author {
  font-weight: 500;
}

.article-category {
  display: inline-block;
  background: var(--color-bg-subtle);
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ── Article Content (rendered markdown body) ── */
.article-content {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--color-text-default);
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-accent-teal);
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content a {
  color: var(--color-accent-teal);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-content a:hover {
  color: var(--color-accent-teal-light);
}

.article-content a.btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  background: var(--color-accent-teal);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s;
}

.article-content a.btn:hover {
  background: var(--color-btn-green-hover);
  color: #fff;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.4rem;
}

.article-content blockquote {
  border-left: 3px solid var(--color-accent-teal);
  margin: 1.5rem 0;
  padding: 0.75rem 1.25rem;
  background: var(--color-bg-subtle);
  color: var(--color-text-secondary);
  font-style: italic;
}

.article-content blockquote p {
  margin-bottom: 0;
}

.article-content pre {
  background: var(--color-text-primary);
  color: var(--color-bg-page);
  padding: 1rem 1.25rem;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.5;
}

.article-content code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
}

.article-content :not(pre) > code {
  background: var(--color-bg-subtle);
  color: var(--color-accent-amber);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--color-border-default);
  margin: 1.5rem auto 0.25rem;
  display: block;
}

.article-content img + em {
  display: block;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--color-border-default);
  margin: 2rem 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.article-content th,
.article-content td {
  border: 1px solid var(--color-border-default);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.article-content th {
  background: var(--color-bg-subtle);
  font-weight: 600;
}

.article-content strong {
  font-weight: 600;
  color: var(--color-text-primary);
}

/* ── Back to Articles ── */
.back-to-articles,
.back-to-articles:visited {
  display: inline-block;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.back-to-articles:hover {
  text-decoration: underline;
}

/* ── CTA Section ── */
.article-cta {
  margin-top: 3rem;
  padding: 2rem;
  background: var(--color-accent-teal);
  border-radius: 8px;
  text-align: center;
}

.article-cta h2 {
  color: #fff;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.article-cta p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1rem;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.article-cta-btn {
  display: inline-block;
  background: #fff;
  color: var(--color-accent-teal);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.7rem 1.75rem;
  border-radius: 6px;
  text-decoration: none;
  transition: opacity 0.15s;
}

.article-cta-btn:hover {
  opacity: 0.9;
}

/* ── Footer ── */
.article-footer {
  background: var(--color-bg-subtle);
  border-top: 1px solid var(--color-border-default);
  padding: 2rem 1.5rem;
  margin-top: auto;
}

.article-footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.article-footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text-primary);
}

.article-footer-brand img {
  width: 24px;
  height: 24px;
}

.article-footer-links {
  display: flex;
  list-style: none;
  gap: 1.25rem;
  flex-wrap: wrap;
  justify-content: center;
}

.article-footer-links a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  transition: color 0.15s;
}

.article-footer-links a:hover {
  color: var(--color-accent-teal);
}

.article-footer-copy {
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

/* ── Article Index ── */
.article-index-header {
  margin-bottom: 2.5rem;
}

.article-index-header h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
}

.article-index-header p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.article-index {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.article-card {
  display: block;
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border-default);
  border-radius: 8px;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.article-card:hover {
  border-color: var(--color-accent-teal);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.article-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.4rem;
  line-height: 1.3;
}

.article-card-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ── Responsive ── */
@media (min-width: 640px) {
  .article-index {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .article-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
  }

  .article-nav-tagline {
    display: none;
  }

  .article-nav-links {
    gap: 1rem;
  }

  .article-container {
    padding: 1.5rem 1rem 3rem;
  }

  .article-header h1 {
    font-size: 1.6rem;
  }

  .article-content {
    font-size: 1rem;
  }

  .article-content h2 {
    font-size: 1.3rem;
  }

  .article-content h3 {
    font-size: 1.1rem;
  }

  .article-cta {
    padding: 1.5rem;
  }
}