:root {
  --night: #F0F2F5;
  --surface: #ffffff;
  --mint: #00A884;
  --blue: #008069;
  --text: #111B21;
  --muted: #54656f;
  --muted-dim: #8696a0;
  --border: #e4e4e7;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--night);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); }
.container { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem; }

/* Header / Footer */
.blog-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 40;
}
.blog-header .container {
  max-width: 72rem;
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 0.9rem; padding-bottom: 0.9rem;
}
.brand-mark { font-weight: 700; font-size: 1.05rem; color: var(--text); text-decoration: none; }
.brand { text-decoration: none; }
.brand-cta {
  font-size: 0.8125rem; font-weight: 600; color: #fff; background: var(--mint);
  padding: 0.5rem 1rem; border-radius: 0.625rem; text-decoration: none;
}
.brand-cta:hover { background: var(--blue); }
.blog-footer {
  background: var(--surface); border-top: 1px solid var(--border);
  margin-top: 3rem; padding: 1.5rem 0; font-size: 0.8125rem; color: var(--muted-dim);
}
.blog-footer .container { max-width: 72rem; display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: space-between; align-items: center; }
.blog-footer nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.blog-footer a { color: var(--muted); text-decoration: none; }
.blog-footer a:hover { color: var(--blue); }

/* Breadcrumb */
.breadcrumb { font-size: 0.75rem; color: var(--muted-dim); margin: 1.5rem 0 0.5rem; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb span { color: var(--muted-dim); }

/* Post */
.post { padding-bottom: 1rem; }
.post-head h1 { font-size: 1.9rem; line-height: 1.2; margin: 0.5rem 0 0.6rem; letter-spacing: -0.02em; }
.post-meta { font-size: 0.8125rem; color: var(--muted-dim); margin-bottom: 1.75rem; }
.post-body { font-size: 1.02rem; color: #1f2b32; }
.post-body p { margin: 0 0 1.1rem; }
.post-body h2 { font-size: 1.35rem; margin: 2rem 0 0.75rem; letter-spacing: -0.01em; }
.post-body h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }
.post-body ul { margin: 0 0 1.1rem 1.25rem; }
.post-body li { margin-bottom: 0.4rem; }
.post-body code { background: #eef1f3; padding: 0.1rem 0.35rem; border-radius: 0.35rem; font-size: 0.9em; }
.post-body table { width: 100%; border-collapse: collapse; margin: 0 0 1.4rem; font-size: 0.9rem; }
.post-body th, .post-body td { border: 1px solid var(--border); padding: 0.6rem 0.75rem; text-align: left; vertical-align: top; }
.post-body th { background: #f6f8f9; font-weight: 600; }

/* FAQ */
.post-faq { margin-top: 2.5rem; }
.post-faq h2 { font-size: 1.35rem; margin-bottom: 1rem; }
.faq-item { border: 1px solid var(--border); border-radius: 0.75rem; background: var(--surface); padding: 0.9rem 1.1rem; margin-bottom: 0.7rem; }
.faq-item summary { font-weight: 600; cursor: pointer; }
.faq-item p { margin-top: 0.6rem; color: var(--muted); font-size: 0.95rem; }

/* CTA */
.post-cta { margin: 2.5rem 0 1rem; background: var(--surface); border: 1px solid var(--border); border-radius: 1rem; padding: 1.5rem; }
.post-cta h2 { font-size: 1.25rem; margin-bottom: 0.5rem; }
.post-cta p { color: var(--muted); font-size: 0.95rem; margin-bottom: 1rem; }
.cta-actions { display: flex; gap: 0.625rem; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.75rem 1.4rem; border-radius: 0.75rem; font-size: 0.9rem; font-weight: 600; text-decoration: none; }
.btn-primary { background: var(--mint); color: #fff; }
.btn-primary:hover { background: var(--blue); }
.btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: rgba(0,168,132,0.5); }

/* Related */
.post-related { margin-top: 2.5rem; }
.post-related h2 { font-size: 1.15rem; margin-bottom: 0.9rem; }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.related-card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 0.75rem; padding: 1rem; text-decoration: none; color: var(--text); font-size: 0.9rem; font-weight: 500; line-height: 1.35; }
.related-card:hover { border-color: rgba(0,168,132,0.5); }
@media (max-width: 560px) { .related-grid { grid-template-columns: 1fr; } }

/* Hub */
.hub { max-width: 60rem; }
.hub-head { margin: 2rem 0 1.75rem; }
.hub-head h1 { font-size: 2rem; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
.hub-head p { color: var(--muted); }
.hub-grid { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.hub-card a { display: block; height: 100%; background: var(--surface); border: 1px solid var(--border); border-radius: 1rem; padding: 1.25rem; text-decoration: none; color: var(--text); }
.hub-card a:hover { border-color: rgba(0,168,132,0.5); }
.hub-card h2 { font-size: 1.05rem; line-height: 1.3; margin-bottom: 0.5rem; }
.hub-card p { font-size: 0.875rem; color: var(--muted); margin-bottom: 0.75rem; }
.hub-more { font-size: 0.8125rem; font-weight: 600; color: var(--blue); }
@media (max-width: 640px) { .hub-grid { grid-template-columns: 1fr; } }