/* ============================
   GRAPHBUS BLOG — STYLES
   ============================ */

/* Google Fonts for article body */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

.blog-body {
  background: var(--bg);
}

/* ============================
   BLOG NAV OVERRIDE
   ============================ */

.blog-body nav {
  border-bottom-color: var(--border);
}

/* ============================
   BLOG INDEX — HERO
   ============================ */

.blog-hero {
  padding: 100px 0 56px;
  border-bottom: 1px solid var(--border);
}

.blog-hero .section-label {
  margin-bottom: 12px;
}

.blog-hero h1 {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.1;
  margin: 0 0 16px;
}

.blog-hero-sub {
  font-size: 18px;
  color: var(--muted);
  max-width: 540px;
  line-height: 1.65;
}

/* ============================
   BLOG INDEX — GRID
   ============================ */

.blog-grid {
  padding: 64px 0 100px;
}

.blog-grid-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  align-items: start;
}

/* ============================
   FEATURED CARD
   ============================ */

.blog-card-featured {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
  display: block;
}

.blog-card-featured:hover {
  border-color: rgba(124,58,237,0.35);
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}

.blog-card-banner {
  height: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent2) 60%, var(--accent3) 100%);
}

.blog-card-body {
  padding: 36px;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

/* Tags */
.blog-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  background: rgba(124,58,237,0.12);
  color: #a78bfa;
  border: 1px solid rgba(124,58,237,0.2);
}

.blog-tag.architecture { background: rgba(6,182,212,0.1); color: var(--accent2); border-color: rgba(6,182,212,0.2); }
.blog-tag.tutorial     { background: rgba(16,185,129,0.1); color: var(--accent3); border-color: rgba(16,185,129,0.2); }
.blog-tag.comparison   { background: rgba(245,158,11,0.1); color: var(--build); border-color: rgba(245,158,11,0.2); }
.blog-tag.protocol     { background: rgba(124,58,237,0.12); color: #a78bfa; border-color: rgba(124,58,237,0.2); }
.blog-tag.deep-dive   { background: rgba(99,102,241,0.1); color: #818cf8; border-color: rgba(99,102,241,0.2); }

.blog-date,
.blog-read-time {
  font-size: 13px;
  color: var(--muted);
}

.blog-date::before { content: '·'; margin-right: 8px; color: var(--border); }
.blog-read-time::before { content: '·'; margin-right: 8px; color: var(--border); }

.blog-card-featured h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.3;
  margin-bottom: 14px;
  color: var(--text);
}

.blog-card-excerpt {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 28px;
}

.blog-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent2);
  transition: gap 0.15s;
}

.blog-card-featured:hover .blog-card-cta { gap: 10px; }

/* ============================
   SIDEBAR CARDS
   ============================ */

.blog-sidebar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: sticky;
  top: 80px;
}

.blog-sidebar-header {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.blog-card-small {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  transition: border-color 0.2s, transform 0.15s;
  text-decoration: none;
  display: block;
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}

.blog-card-small.ready {
  opacity: 1;
  cursor: pointer;
  pointer-events: auto;
}

.blog-card-small.ready:hover {
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-1px);
}

.blog-card-small-tag {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 8px;
}

.blog-card-small h3 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 6px;
}

.blog-card-small p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.55;
}

.coming-soon-badge {
  display: inline-block;
  margin-top: 10px;
  font-size: 11px;
  padding: 2px 9px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ============================
   ARTICLE PAGE LAYOUT
   ============================ */

.article-page {
  padding-top: 60px;
}

.article-header {
  max-width: 780px;
  margin: 0 auto;
  padding: 60px 24px 48px;
  border-bottom: 1px solid var(--border);
}

.article-header .blog-card-meta {
  margin-bottom: 24px;
}

.article-header h1 {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.18;
  margin-bottom: 24px;
  color: var(--text);
}

.article-lede {
  font-size: 20px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 32px;
  font-weight: 400;
}

.article-byline {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--muted);
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.article-byline-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: white;
  font-weight: 700;
  flex-shrink: 0;
}

.article-byline-name {
  color: var(--text);
  font-weight: 600;
}

.article-byline-sep {
  color: var(--border);
  margin: 0 4px;
}

/* ============================
   ARTICLE BODY
   ============================ */

.article-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 24px 96px;
}

.article-body > * + * {
  margin-top: 0;
}

.article-body p {
  font-size: 17.5px;
  line-height: 1.85;
  color: #c4c4c8;
  margin-bottom: 28px;
  font-weight: 400;
}

.article-body h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.6px;
  color: var(--text);
  margin: 56px 0 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 80px;
  line-height: 1.25;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin: 40px 0 14px;
  scroll-margin-top: 80px;
}

.article-body h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

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

.article-body em {
  color: #c4c4c8;
  font-style: italic;
}

.article-body a {
  color: var(--accent2);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(6,182,212,0.4);
  transition: text-decoration-color 0.15s;
}

.article-body a:hover {
  text-decoration-color: var(--accent2);
}

.article-body ul,
.article-body ol {
  padding-left: 24px;
  margin-bottom: 28px;
}

.article-body li {
  font-size: 17.5px;
  line-height: 1.75;
  color: #c4c4c8;
  margin-bottom: 10px;
}

.article-body li strong { color: var(--text); }

/* Inline code */
.article-body code {
  font-family: var(--mono);
  font-size: 13.5px;
  background: rgba(255,255,255,0.07);
  padding: 2px 7px;
  border-radius: 5px;
  color: #67e8f9;
  border: 1px solid rgba(255,255,255,0.07);
}

/* Code blocks */
.article-body pre {
  background: #0b0b0e;
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: 12px;
  padding: 24px 28px;
  overflow-x: auto;
  margin: 32px 0;
  position: relative;
}

.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 14px;
  color: #e4e4e7;
  line-height: 1.7;
}

/* Language label on code blocks */
.article-body pre[data-lang]::before {
  content: attr(data-lang);
  position: absolute;
  top: 10px;
  right: 16px;
  font-size: 11px;
  font-family: var(--mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.6;
}

/* ============================
   CALLOUTS
   ============================ */

.article-callout {
  border-left: 3px solid var(--accent);
  background: rgba(124,58,237,0.07);
  padding: 18px 22px;
  border-radius: 0 10px 10px 0;
  margin: 36px 0;
  font-size: 16.5px;
  color: var(--text);
  line-height: 1.75;
}

.article-callout.cyan {
  border-left-color: var(--accent2);
  background: rgba(6,182,212,0.07);
}

.article-callout.green {
  border-left-color: var(--accent3);
  background: rgba(16,185,129,0.07);
}

.article-callout.amber {
  border-left-color: var(--build);
  background: rgba(245,158,11,0.07);
}

.article-callout strong {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ============================
   COMPARISON TABLE
   ============================ */

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 36px 0;
  font-size: 14px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.article-body th {
  background: var(--bg3);
  color: var(--muted);
  font-weight: 700;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.article-body td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: #c4c4c8;
  vertical-align: top;
  line-height: 1.5;
}

.article-body tr:last-child td {
  border-bottom: none;
}

.article-body tr:nth-child(even) td {
  background: rgba(255,255,255,0.015);
}

.article-body td:first-child { font-weight: 600; color: var(--text); }

/* ============================
   HORIZONTAL RULE
   ============================ */

.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 56px 0;
}

/* ============================
   ARTICLE CTA BOX
   ============================ */

.article-cta {
  background: linear-gradient(135deg, rgba(124,58,237,0.1) 0%, rgba(6,182,212,0.06) 100%);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: 16px;
  padding: 44px 48px;
  margin: 56px 0 0;
  text-align: center;
}

.article-cta h3 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin: 0 0 10px !important;
}

.article-cta p {
  font-size: 16px !important;
  margin-bottom: 28px !important;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.article-cta .btn { margin: 0 6px; }

/* ============================
   ARTICLE TAGS FOOTER
   ============================ */

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.article-tag-item {
  display: inline-block;
  padding: 5px 13px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--muted);
  transition: border-color 0.15s, color 0.15s;
}

.article-tag-item:hover {
  border-color: rgba(255,255,255,0.2);
  color: var(--text);
}

/* ============================
   ARTICLE PREV/NEXT NAV
   ============================ */

.article-nav {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 80px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.article-nav-link {
  flex: 1;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  text-decoration: none;
  transition: border-color 0.2s, transform 0.15s;
  max-width: 48%;
}

.article-nav-link:hover {
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-1px);
}

.article-nav-dir {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 8px;
}

.article-nav-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}

/* ============================
   RESPONSIVE
   ============================ */

@media (max-width: 900px) {
  .blog-grid-inner {
    grid-template-columns: 1fr;
  }

  .blog-sidebar {
    display: none;
  }

  .article-header h1 {
    font-size: 28px;
    letter-spacing: -0.8px;
  }

  .article-lede {
    font-size: 17px;
  }

  .article-body p,
  .article-body li {
    font-size: 16px;
  }

  .article-cta {
    padding: 28px 24px;
  }

  .article-body h2 {
    font-size: 23px;
  }

  .article-nav {
    flex-direction: column;
  }

  .article-nav-link {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .blog-hero { padding: 80px 0 40px; }
  .blog-hero h1 { letter-spacing: -1.2px; }
  .blog-card-body { padding: 20px; }
  .blog-card-featured h2 { font-size: 22px; }
  .blog-card-excerpt { font-size: 14px; }
  .article-header { padding: 40px 16px 28px; }
  .article-header h1 { font-size: 24px; letter-spacing: -0.5px; }
  .article-lede { font-size: 15px; }
  .article-body { padding: 36px 16px 56px; }
  .article-body pre { padding: 14px 14px; overflow-x: auto; }
  .article-body p,
  .article-body li { font-size: 15.5px; }
  .article-body h2 { font-size: 20px; margin: 40px 0 16px; }
  .article-body h3 { font-size: 18px; }
  .article-cta { padding: 24px 20px; }
  .article-cta h3 { font-size: 20px; }
  .article-nav { padding: 0 16px 56px; gap: 12px; }
  .article-nav-link { padding: 16px 18px; }
}

/* ============================
   ARTICLE TABLE — SCROLL WRAP
   ============================ */

@media (max-width: 640px) {
  /* Wrap wide tables in .table-scroll for horizontal scroll */
  .article-body .table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 36px 0;
    border-radius: 10px;
  }

  .article-body .table-scroll table {
    min-width: 480px;
    margin: 0;
  }
}

/* ── Related Articles ──────────────────────────────────────────────── */
.related-articles {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.related-articles h2 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 20px 0;
}

.related-articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.related-article-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 10px;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.related-article-card:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.15);
}

.related-article-card .rac-tag {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent, #7c6fff);
}

.related-article-card .rac-title {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--fg, #f0f0f0);
  line-height: 1.4;
}