/* ============================================================
   BLOG.CSS — Blog-specific styles for USA Data Tools
   Builds on saas.css (loaded in every page)
   ============================================================ */

:root {
  --blog-content-width: 760px;
  --blog-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
}

/* === BLOG LAYOUT === */
.blog-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem var(--content-pad);
}

.blog-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 960px) {
  .blog-layout { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* === HERO === */
.blog-hero {
  text-align: center;
  padding: 4.5rem 1.5rem 2.5rem;
  max-width: 800px;
  margin: 0 auto;
}
.blog-hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}
.blog-hero p {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--text-muted);
}

/* === FEATURED === */
.blog-featured { margin-bottom: 3rem; }
.blog-featured-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.blog-featured-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.blog-featured-img {
  min-height: 280px;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
}
.blog-featured-body { padding: 2rem; }
.blog-featured-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0.75rem 0 0.75rem;
}
.blog-featured-body p {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}
@media (max-width: 720px) {
  .blog-featured-card { grid-template-columns: 1fr; }
  .blog-featured-img { min-height: 180px; }
}

/* === ARTICLE GRID === */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.75rem;
}
.blog-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-decoration: none;
  color: var(--text);
}
.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
  color: var(--text);
}
.blog-card-img {
  height: 160px;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  position: relative;
}
.blog-card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(255,255,255,0.25), transparent 60%);
}
.blog-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}
.blog-card-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.blog-card-body .excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.55;
  flex: 1;
}
.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
}
.blog-card-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: 0.5; }

/* === SIDEBAR === */
.blog-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  position: sticky;
  top: calc(var(--nav-height) + 1.5rem);
}
.sidebar-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.sidebar-block h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.sidebar-categories { list-style: none; display: flex; flex-direction: column; gap: 0.375rem; }
.sidebar-categories li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.625rem;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  transition: background var(--transition);
}
.sidebar-categories li a:hover,
.sidebar-categories li a.active { background: var(--primary-soft); color: var(--primary); }
.sidebar-categories .count {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.05rem 0.5rem;
}

.sidebar-related { list-style: none; display: flex; flex-direction: column; gap: 0.875rem; }
.sidebar-related a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  color: var(--text);
  text-decoration: none;
}
.sidebar-related a .t { font-size: 0.9rem; font-weight: 600; line-height: 1.35; }
.sidebar-related a .m { font-size: 0.78rem; color: var(--text-muted); }
.sidebar-related a:hover .t { color: var(--primary); }

.sidebar-tools { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.sidebar-tools a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.625rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text);
}
.sidebar-tools a:hover { background: var(--primary-soft); color: var(--primary); }

/* === ARTICLE PAGE === */
.article-header { padding: 3rem 1.5rem 1.5rem; text-align: center; max-width: var(--blog-content-width); margin: 0 auto; }
.article-header h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0.75rem 0;
}
.article-header .byline {
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}
.article-header .byline .dot { width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: 0.5; }

.article-hero-img {
  max-width: var(--blog-content-width);
  margin: 1.5rem auto 0;
  height: 260px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  position: relative;
  overflow: hidden;
}
.article-hero-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 25% 15%, rgba(255,255,255,0.25), transparent 65%);
}

/* === ARTICLE BODY === */
.article-body {
  max-width: var(--blog-content-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text);
}
.article-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 2.5rem 0 1rem;
  line-height: 1.25;
  scroll-margin-top: calc(var(--nav-height) + 1rem);
}
.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 2rem 0 0.75rem;
  line-height: 1.3;
}
.article-body p { margin: 0 0 1.1rem; }
.article-body ul, .article-body ol { margin: 0 0 1.25rem; padding-left: 1.5rem; }
.article-body li { margin-bottom: 0.5rem; line-height: 1.7; }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--primary-hover); }
.article-body strong { font-weight: 700; color: var(--text); }
.article-body img.inline {
  width: 100%;
  height: 200px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--gradient-1) 0%, var(--gradient-3) 100%);
  margin: 1.75rem 0;
}
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-soft);
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-sm);
  margin: 1.5rem 0;
  color: var(--text);
  font-size: 1rem;
}
.article-body blockquote p { margin: 0; }

/* Inline code */
.article-body code {
  font-family: var(--blog-mono);
  font-size: 0.85em;
  background: var(--primary-soft);
  color: var(--primary);
  padding: 0.12em 0.4em;
  border-radius: 6px;
  font-weight: 600;
}

/* Code blocks */
.article-body pre {
  background: #0b1020;
  color: #e2e8f0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: var(--blog-mono);
  font-size: 0.85rem;
  line-height: 1.65;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}
.article-body pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
  font-weight: 400;
  border-radius: 0;
}

/* Tables in articles */
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.article-body th, .article-body td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.article-body th { background: var(--bg-elevated); font-weight: 700; color: var(--text-muted); text-transform: uppercase; font-size: 0.78rem; letter-spacing: 0.04em; }
.article-body tbody tr:hover { background: var(--primary-soft); }
.article-body tbody tr:last-child td { border-bottom: 0; }

@media (max-width: 720px) { .article-body table { display: block; overflow-x: auto; white-space: nowrap; } }

/* Lead/first paragraph */
.article-body > p:first-of-type { font-size: 1.15rem; color: var(--text); }

/* === AFFILIATE DISCLOSURE === */
.affiliate-disclosure {
  max-width: var(--blog-content-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.affiliate-disclosure .box {
  background: rgba(217, 119, 6, 0.08);
  border: 1px solid rgba(217, 119, 6, 0.3);
  border-left: 4px solid var(--warning);
  padding: 0.75rem 1.125rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.affiliate-disclosure .box strong { color: var(--warning); }

/* === AUTHOR BIO === */
.author-bio {
  max-width: var(--blog-content-width);
  margin: 2.5rem auto 0;
  padding: 0 1.5rem;
}
.author-bio .box {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.author-bio .avatar {
  flex: 0 0 56px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 1.1rem;
}
.author-bio h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.25rem; }
.author-bio p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }
@media (max-width: 520px) {
  .author-bio .box { flex-direction: column; }
}

/* === CTA in article === */
.article-cta {
  max-width: var(--blog-content-width);
  margin: 2rem auto;
  background: linear-gradient(135deg, var(--primary-soft), rgba(124, 58, 237, 0.08));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
}
.article-cta h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.5rem; }
.article-cta p { color: var(--text-muted); font-size: 0.92rem; margin-bottom: 1rem; }
.article-cta .saas-btn { margin: 0 0.25rem; }

/* === BREADCRUMB === */
.breadcrumbs {
  max-width: var(--blog-content-width);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--primary); }
.breadcrumbs .sep { opacity: 0.5; }
.breadcrumbs .current { color: var(--text); font-weight: 500; }

/* === SECTION TITLE === */
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.section-title h2 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.section-title a { font-size: 0.85rem; color: var(--primary); }

/* === CATEGORY PAGE HEADER === */
.category-hero {
  text-align: center;
  padding: 3.5rem 1.5rem 1.5rem;
}
.category-hero h1 {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}
.category-hero p { color: var(--text-muted); font-size: 1.05rem; }