/* Blog Index */
.blog-hero {
  padding: 48px 0 32px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(217,166,51,0.08) 0%, transparent 60%);
}
.blog-hero h1 { font-size: 24px; margin-bottom: 8px; }
.blog-hero p { color: var(--text-secondary); font-size: 15px; }

.blog-filters {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
  padding: 24px 0 8px;
}
.blog-filter-btn {
  background: none; border: 1px solid var(--border); color: var(--text-secondary);
  padding: 6px 16px; border-radius: 20px; font-size: 13px;
  cursor: pointer; transition: border-color 0.3s, color 0.3s, background 0.3s;
  font-family: inherit;
}
.blog-filter-btn:hover { border-color: rgba(217,166,51,0.3); color: var(--text); }
.blog-filter-btn.active {
  background: var(--gradient); color: var(--bg);
  border-color: transparent; font-weight: 700;
}

.blog-grid {
  display: flex; flex-direction: column; gap: 16px;
  padding: 32px 0 80px;
}

.blog-card {
  display: block;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px 24px;
  transition: border-color 0.3s, background 0.3s, transform 0.2s;
  text-decoration: none; color: inherit;
}
.blog-card:hover {
  border-color: rgba(217,166,51,0.3); background: var(--card-hover);
  transform: translateY(-2px); opacity: 1;
}
.blog-card-meta {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 10px; font-size: 12px; color: var(--text-tertiary);
}
.blog-card-category {
  display: inline-block;
  background: rgba(217,166,51,0.12); color: var(--accent);
  padding: 2px 10px; border-radius: 10px;
  font-size: 11px; font-weight: 700;
}
.blog-card h2 {
  font-size: 17px; margin-bottom: 8px; line-height: 1.5;
}
.blog-card p {
  color: var(--text-secondary); font-size: 14px; line-height: 1.7;
}
.blog-card-footer {
  display: flex; align-items: center; gap: 12px;
  margin-top: 12px; font-size: 12px; color: var(--text-tertiary);
}
.blog-card-paper {
  margin-top: 10px; padding: 10px 14px;
  background: rgba(217,166,51,0.04); border-radius: 8px;
  font-size: 12px; color: var(--text-tertiary); line-height: 1.6;
}

.blog-pagination {
  display: flex; justify-content: center; gap: 8px;
  padding: 0 0 80px;
}
.blog-page-btn {
  background: var(--card); border: 1px solid var(--border); color: var(--text-secondary);
  width: 36px; height: 36px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; cursor: pointer; transition: border-color 0.3s;
  font-family: inherit;
}
.blog-page-btn:hover { border-color: rgba(217,166,51,0.3); color: var(--text); }
.blog-page-btn.active {
  background: var(--gradient); color: var(--bg);
  border-color: transparent; font-weight: 700;
}

/* Article Page */
.article-header {
  padding: 48px 0 32px;
  background: radial-gradient(ellipse at 50% 0%, rgba(217,166,51,0.08) 0%, transparent 60%);
}
.article-header .container { max-width: 720px; }
.article-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  margin-bottom: 16px; font-size: 13px; color: var(--text-tertiary);
}
.article-category {
  display: inline-block;
  background: rgba(217,166,51,0.15); color: var(--accent);
  padding: 3px 12px; border-radius: 12px;
  font-size: 12px; font-weight: 700; letter-spacing: 0.5px;
}
.article-header h1 {
  font-size: 26px; line-height: 1.5; margin-bottom: 12px;
}
.article-header .article-lead {
  color: var(--text-secondary); font-size: 15px; line-height: 1.8;
}

.article-header .article-author { margin-left: 8px; }
.article-header .article-author a { color: var(--accent); text-decoration: none; }
.article-header .article-author a:hover { text-decoration: underline; }

/* TL;DR summary (first-30%-of-article AI-citation sweetspot) */
.tldr {
  background: linear-gradient(180deg, rgba(217,166,51,0.06), rgba(217,166,51,0.02));
  border-top: 1px solid rgba(217,166,51,0.2);
  border-bottom: 1px solid rgba(217,166,51,0.2);
  padding: 24px 0;
}
.tldr .container {
  max-width: 720px;
  padding-left: 24px; padding-right: 24px;
}
.tldr h2 {
  font-size: 13px; font-weight: 700;
  color: var(--accent);
  text-transform: uppercase; letter-spacing: 1.5px;
  margin: 0 0 10px;
  padding: 0; border: none;
}
.tldr p {
  color: var(--text); font-size: 15px; line-height: 1.9;
  margin: 0;
}
.tldr p strong { color: var(--accent); font-weight: 700; }

.article-body {
  padding: 40px 0;
  max-width: 720px; margin: 0 auto;
  padding-left: 24px; padding-right: 24px;
}
.article-body h2 {
  font-size: 20px; margin: 48px 0 16px; padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.article-body h2:first-child { margin-top: 0; }
.article-body h3 {
  font-size: 17px; margin: 32px 0 12px; color: var(--text);
}
.article-body p {
  color: var(--text-secondary); font-size: 15px; line-height: 2.0;
  margin-bottom: 20px;
}
.article-body ul, .article-body ol {
  color: var(--text-secondary); font-size: 15px; line-height: 2.0;
  padding-left: 24px; margin-bottom: 20px;
}
.article-body li { margin-bottom: 8px; }
.article-body strong { color: var(--text); }
.article-body blockquote {
  margin: 24px 0;
  padding: 16px 24px;
  border-left: 3px solid var(--accent);
  background: rgba(217,166,51,0.04);
  border-radius: 0 12px 12px 0;
  color: var(--text-secondary);
  font-size: 15px; line-height: 1.9;
}

/* Key findings highlight box */
.key-finding {
  background: var(--card); border: 1px solid rgba(217,166,51,0.2);
  border-radius: 12px; padding: 20px 24px;
  margin: 24px 0;
}
.key-finding-label {
  font-size: 12px; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 8px;
}
.key-finding p { margin-bottom: 0; }

/* Evidence level badge */
.evidence-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--card); border: 1px solid var(--border);
  padding: 8px 16px; border-radius: 10px;
  font-size: 13px; color: var(--text-secondary);
  margin: 16px 0 24px;
}
.evidence-badge strong { color: var(--accent); }

/* Paper reference box */
.paper-ref {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 24px;
  margin: 32px 0;
}
.paper-ref-label {
  font-size: 11px; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 10px;
}
.paper-ref-title {
  font-size: 14px; font-weight: 600; color: var(--text);
  margin-bottom: 6px; line-height: 1.6;
}
.paper-ref-authors {
  font-size: 13px; color: var(--text-tertiary); margin-bottom: 4px;
}
.paper-ref-journal {
  font-size: 13px; color: var(--text-tertiary); font-style: italic;
}
.paper-ref-link {
  display: inline-block; margin-top: 10px;
  font-size: 13px; color: var(--cyan);
}

/* Article navigation */
.article-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  max-width: 720px; margin: 0 auto;
  padding: 0 24px 40px;
  border-top: 1px solid var(--border);
  padding-top: 32px;
}
.article-nav a {
  display: block; padding: 16px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; color: var(--text);
  transition: border-color 0.3s;
  font-size: 14px; line-height: 1.5;
}
.article-nav a:hover { border-color: rgba(217,166,51,0.3); opacity: 1; }
.article-nav-label {
  font-size: 11px; color: var(--text-tertiary);
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 4px;
}
.article-nav .next { text-align: right; }

/* Article CTA */
.article-cta {
  text-align: center; padding: 48px 24px;
  max-width: 720px; margin: 0 auto;
}
.article-cta h2 { font-size: 20px; margin-bottom: 10px; }
.article-cta p { color: var(--text-secondary); font-size: 14px; margin-bottom: 20px; }

/* Tags */
.article-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  max-width: 720px; margin: 0 auto;
  padding: 0 24px 32px;
}
.article-tag {
  display: inline-block; padding: 4px 12px;
  border: 1px solid var(--border); border-radius: 16px;
  font-size: 12px; color: var(--text-tertiary);
  transition: border-color 0.3s;
}
.article-tag:hover { border-color: rgba(217,166,51,0.3); color: var(--text-secondary); opacity: 1; }

/* FAQ Section */
.article-faq {
  margin: 40px 0 0;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.article-faq h2 {
  font-size: 18px;
  margin: 0 0 20px;
  padding-bottom: 0;
  border-bottom: none;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 12px;
}
.faq-item h3 {
  font-size: 15px;
  margin: 0 0 10px;
  color: var(--text);
  font-weight: 700;
}
.faq-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 600px) {
  .article-header h1 { font-size: 22px; }
  .article-body h2 { font-size: 18px; }
  .article-nav { grid-template-columns: 1fr; }
  .article-nav .next { text-align: left; }
  .blog-card h2 { font-size: 16px; }
}