:root {
  --primary: #0b5fff;
  --primary-dark: #063d9e;
  --dark: #0d1321;
  --gray: #6b7280;
  --light-bg: #f7f9fc;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--dark);
  background: #fff;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.logo {
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-weight: 500;
  color: var(--dark);
}

.nav-links a:hover { color: var(--primary); }

.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover { background: var(--primary-dark); }

.btn-outline {
  border: 1px solid var(--border);
  color: var(--dark);
}

/* Hero */
.hero {
  padding: 90px 0 70px;
  background: linear-gradient(180deg, var(--light-bg) 0%, #fff 100%);
  text-align: center;
}

.hero h1 {
  font-size: 2.8rem;
  margin: 0 0 20px;
  font-weight: 800;
}

.hero p {
  max-width: 620px;
  margin: 0 auto 32px;
  color: var(--gray);
  font-size: 1.15rem;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* Sections */
section { padding: 70px 0; }

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 { font-size: 2rem; margin-bottom: 12px; }
.section-title p { color: var(--gray); }

.grid {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  background: #fff;
}

.card .icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(11, 95, 255, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.card h3 { margin: 0 0 10px; font-size: 1.15rem; }
.card p { color: var(--gray); margin: 0; font-size: 0.95rem; }

.alt-bg { background: var(--light-bg); }

.cta {
  text-align: center;
  background: var(--primary);
  color: #fff;
  border-radius: 20px;
  padding: 56px 32px;
  margin: 0 24px;
}

.cta h2 { margin: 0 0 12px; }
.cta p { opacity: 0.9; margin-bottom: 28px; }
.cta .btn-primary { background: #fff; color: var(--primary); }
.cta .btn-primary:hover { background: #eef2ff; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
  color: var(--gray);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-grid h4 {
  color: var(--dark);
  margin: 0 0 14px;
  font-size: 0.95rem;
}

.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a:hover { color: var(--primary); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  text-align: center;
}

/* Blog / Docs list */
.page-header {
  padding: 60px 0 20px;
  text-align: center;
}

.page-header h1 { font-size: 2.2rem; margin-bottom: 10px; }
.page-header p { color: var(--gray); }

.post-list { display: grid; gap: 24px; margin-bottom: 60px; }

.post-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 26px;
}

.post-card .meta { color: var(--gray); font-size: 0.85rem; margin-bottom: 8px; }
.post-card h3 { margin: 0 0 10px; }
.post-card p { color: var(--gray); margin: 0; }

.prose { max-width: 720px; margin: 0 auto; padding: 40px 0 80px; }
.prose h1 { font-size: 2rem; }
.prose h2 { margin-top: 2em; }
.prose p, .prose li { color: #374151; }

/* Contact form */
.contact-form {
  max-width: 560px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.contact-form label { font-weight: 600; font-size: 0.9rem; }

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
}

.contact-form textarea { min-height: 140px; resize: vertical; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 2.1rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}