:root {
  --navy: #0f1e36;
  --emerald: #10b981;
  --text: #1e293b;
  --muted: #64748b;
  --bg: #f8fafc;
  --card: #ffffff;
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  color: var(--text);
  line-height: 1.65;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); }
a { color: var(--emerald); font-weight: 600; }
.site-header {
  background: var(--navy);
  color: #fff;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.site-header a { color: #a7f3d0; text-decoration: none; }
.brand { font-family: Outfit, sans-serif; font-weight: 800; font-size: 1.15rem; color: #fff; text-decoration: none; }
main { max-width: 720px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
article { background: var(--card); border-radius: 16px; padding: 1.75rem; border: 1px solid #e2e8f0; }
h1 { font-family: Outfit, sans-serif; color: var(--navy); font-size: clamp(1.6rem, 4vw, 2.1rem); line-height: 1.2; margin-top: 0; }
.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
h2 { font-family: Outfit, sans-serif; color: var(--navy); font-size: 1.25rem; margin-top: 2rem; }
ul, ol { padding-left: 1.25rem; }
li { margin: 0.35rem 0; }
.cta-box {
  margin: 2rem 0 0;
  padding: 1.5rem;
  border-radius: 14px;
  background: linear-gradient(135deg, #ecfdf5, #f0fdf4);
  border: 2px solid var(--emerald);
  text-align: center;
}
.cta-box h2 { margin-top: 0; font-size: 1.2rem; }
.btn {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.85rem 1.75rem;
  background: var(--emerald);
  color: #fff;
  text-decoration: none;
  border-radius: 999px;
  font-weight: 700;
}
.blog-index-list { list-style: none; padding: 0; }
.blog-index-list li { margin: 1rem 0; padding: 1rem; border: 1px solid #e2e8f0; border-radius: 12px; background: var(--card); }
.blog-index-list a { color: var(--navy); font-size: 1.1rem; }
footer { text-align: center; color: var(--muted); font-size: 0.85rem; padding: 2rem 1rem; }