:root {
  --blue: #3B82F6;
  --blue-dark: #2563EB;
  --bg: #0B0F1A;
  --bg-card: #111827;
  --text: #F1F5F9;
  --text-muted: #94A3B8;
  --border: rgba(148, 163, 184, 0.15);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-dark); }

/* Nav */
nav { position: sticky; top: 0; z-index: 50; background: rgba(11, 15, 26, 0.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1100px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; }
.nav-brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; }
.nav-logo { width: 28px; height: 28px; border-radius: 7px; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--text-muted); font-size: 15px; }
.nav-links a:hover { color: var(--text); }
.btn { display: inline-block; padding: 9px 18px; border-radius: 9px; font-weight: 600; font-size: 14px; border: 1px solid transparent; cursor: pointer; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); color: #fff; }

/* Layout */
.container { max-width: 760px; margin: 0 auto; padding: 56px 24px 80px; }
.eyebrow { color: var(--blue); font-weight: 600; font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; }
.article h1 { font-size: clamp(30px, 5vw, 44px); line-height: 1.15; margin: 14px 0 18px; letter-spacing: -0.02em; }
.article h2 { font-size: 25px; margin: 40px 0 14px; letter-spacing: -0.01em; }
.article h3 { font-size: 19px; margin: 28px 0 10px; }
.article p { color: #cbd5e1; margin: 0 0 18px; font-size: 17px; }
.article ul, .article ol { color: #cbd5e1; margin: 0 0 18px 22px; font-size: 17px; }
.article li { margin-bottom: 8px; }
.article strong { color: var(--text); }
.meta { color: var(--text-muted); font-size: 14px; margin-bottom: 36px; }
.cta-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 28px; margin: 44px 0 0; text-align: center; }
.cta-box h3 { margin: 0 0 8px; font-size: 21px; }
.cta-box p { color: var(--text-muted); margin: 0 0 18px; }

/* Blog index */
.blog-header { text-align: center; margin-bottom: 48px; }
.blog-header h1 { font-size: clamp(32px, 6vw, 48px); margin: 12px 0 12px; letter-spacing: -0.02em; }
.blog-header p { color: var(--text-muted); font-size: 18px; }
.post-card { display: block; background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 26px 28px; margin-bottom: 18px; transition: border-color .2s, transform .2s; }
.post-card:hover { border-color: var(--blue); transform: translateY(-2px); }
.post-card h2 { color: var(--text); font-size: 22px; margin: 0 0 8px; letter-spacing: -0.01em; }
.post-card p { color: var(--text-muted); margin: 0; font-size: 16px; }
.post-card .read { color: var(--blue); font-weight: 600; font-size: 14px; display: inline-block; margin-top: 14px; }

/* Footer */
footer { border-top: 1px solid var(--border); }
.footer-inner { max-width: 1100px; margin: 0 auto; padding: 32px 24px; display: flex; flex-wrap: wrap; gap: 18px; align-items: center; justify-content: space-between; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); font-size: 14px; }
.footer-links a:hover { color: var(--text); }
.footer-copy { color: var(--text-muted); font-size: 13px; width: 100%; }