:root {
  --dark: #050510;
  --dark-2: #0a0a1a;
  --dark-3: #111128;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-dark: #2563eb;
  --accent-glow: rgba(59,130,246,0.3);
  --text-on-dark: #e8eaf0;
  --text-muted-dark: rgba(232,234,240,0.45);
  --text-dark: #1a1a2e;
  --text-light: #6b7280;
  --bg-light: #f0f4ff;
  --bg-white: #ffffff;
  --border: #e5e7eb;
  --radius: 20px;
  --font: 'DM Sans', system-ui, sans-serif;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-white);
  color: var(--text-dark);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Header nav */
.blog-header {
  background: var(--dark);
  color: var(--text-on-dark);
  padding: 20px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.blog-header .wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.blog-header a {
  color: var(--text-on-dark);
  text-decoration: none;
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  font-size: 20px;
}
.blog-header a.logo span { color: var(--accent-light); }
.blog-header nav {
  display: flex;
  gap: 24px;
  font-size: 14px;
  font-weight: 500;
}
.blog-header nav a {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0;
}
.blog-header nav a:hover { color: var(--accent-light); }

/* Article */
.article {
  max-width: 740px;
  margin: 0 auto;
  padding: 56px 20px 40px;
}

.article .eyebrow {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-dark);
  font-weight: 700;
  margin-bottom: 12px;
}

.article h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
}

.article .lead {
  font-size: 19px;
  color: var(--text-light);
  margin-bottom: 32px;
  line-height: 1.55;
}

.article .meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.article h2 {
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--text-dark);
  margin: 40px 0 14px;
  letter-spacing: -0.01em;
}

.article h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text-dark);
  margin: 24px 0 10px;
}

.article p {
  font-size: 17px;
  color: #374151;
  margin-bottom: 16px;
}

.article ul, .article ol {
  margin: 14px 0 20px;
  padding-left: 24px;
}

.article li {
  font-size: 17px;
  color: #374151;
  margin-bottom: 8px;
  line-height: 1.6;
}

.article a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article a:hover { color: var(--accent); }

.article strong { color: var(--text-dark); font-weight: 700; }

/* Callout */
.callout {
  background: var(--bg-light);
  border-left: 4px solid var(--accent);
  padding: 20px 24px;
  margin: 24px 0;
  border-radius: 4px;
}
.callout p { margin-bottom: 0; font-size: 16px; }
.callout strong { color: var(--accent-dark); }

/* CTA box */
.cta-box {
  background: linear-gradient(135deg, var(--dark), var(--dark-2));
  color: white;
  padding: 36px 28px;
  border-radius: var(--radius);
  margin: 48px 0 32px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.12);
}
.cta-box h3 {
  color: white;
  font-size: 24px;
  margin-bottom: 10px;
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}
.cta-box p {
  color: rgba(255,255,255,0.8);
  font-size: 16px;
  margin-bottom: 20px;
}
.cta-box .btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 14px 32px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(59,130,246,0.35);
}
.cta-box .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(59,130,246,0.5);
}

/* Related */
.related {
  max-width: 1040px;
  margin: 0 auto;
  padding: 48px 20px 80px;
  border-top: 1px solid var(--border);
}
.related h3 {
  font-family: var(--font-display);
  font-size: 20px;
  margin-bottom: 20px;
  color: var(--text-dark);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.related-card {
  display: block;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  color: var(--text-dark);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.related-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(59,130,246,0.1);
}
.related-card .cat {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-dark);
  font-weight: 700;
  margin-bottom: 6px;
}
.related-card h4 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-dark);
}

/* Footer */
.blog-footer {
  background: var(--dark);
  color: var(--text-muted-dark);
  padding: 40px 20px;
  text-align: center;
  font-size: 14px;
}
.blog-footer a {
  color: var(--accent-light);
  text-decoration: none;
}
.blog-footer a:hover { text-decoration: underline; }

/* Blog index */
.blog-hero {
  background: linear-gradient(135deg, var(--dark), var(--dark-2));
  color: white;
  padding: 72px 20px 64px;
  text-align: center;
}
.blog-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1.1;
}
.blog-hero p {
  font-size: 18px;
  color: rgba(255,255,255,0.75);
  max-width: 640px;
  margin: 0 auto;
}
.blog-list {
  max-width: 1040px;
  margin: 0 auto;
  padding: 56px 20px 80px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}
.blog-card {
  display: block;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  text-decoration: none;
  color: var(--text-dark);
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.blog-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 12px 32px rgba(59,130,246,0.12);
}
.blog-card .cat {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-dark);
  font-weight: 700;
  margin-bottom: 10px;
}
.blog-card h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-dark);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.blog-card p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.55;
}