*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  background: #0b1220;
  color: #e5e7eb;
}

a {
  color: #fbbf24;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: 90%;
  max-width: 1120px;
  margin: 0 auto;
}

/* Header and navigation */

.site-header {
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid rgba(148, 163, 184, 0.3);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
}

.logo a {
  font-weight: 700;
  font-size: 1.1rem;
  color: #facc15;
  letter-spacing: 0.03em;
}

.main-nav a {
  margin-left: 1.5rem;
  font-weight: 500;
  color: #e5e7eb;
  font-size: 0.95rem;
}

.main-nav a.active {
  color: #fbbf24;
}

/* Hero */

.hero {
  background: radial-gradient(circle at top, #1d4ed8, #020617);
  padding: 3.5rem 0 3rem;
  color: #f9fafb;
}

.hero-content h1 {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.hero-content p {
  max-width: 700px;
  margin-bottom: 0.5rem;
}

/* Sections */

.section {
  padding: 2.5rem 0;
}

.section-light {
  background: #020617;
}

/* Cards */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.card {
  background: linear-gradient(145deg, #020617, #0f172a);
  border-radius: 14px;
  padding: 1.5rem;
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.8);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.btn {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.55rem 1.2rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(to right, #fbbf24, #f97316);
  color: #111827;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 12px 30px rgba(251, 191, 36, 0.45);
}

.btn:hover {
  text-decoration: none;
  filter: brightness(1.05);
}

/* Blog layout */

.blog-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.5fr) minmax(230px, 1fr);
  gap: 2rem;
}

.blog-content h1 {
  margin-top: 0;
  margin-bottom: 1rem;
}

.blog-content h2 {
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.blog-content ul {
  padding-left: 1.2rem;
}

.blog-content li {
  margin-bottom: 0.25rem;
}

/* Sidebar */

.sidebar {
  background: linear-gradient(145deg, #020617, #111827);
  border-radius: 14px;
  padding: 1.25rem;
  border: 1px solid rgba(148, 163, 184, 0.35);
  height: fit-content;
}

.sidebar h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar li + li {
  margin-top: 0.4rem;
}

.sidebar a {
  font-size: 0.92rem;
}

/* Contact */

.contact-grid {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.2rem;
}

.contact-card {
  background: linear-gradient(145deg, #020617, #0b1120);
  border-radius: 14px;
  padding: 1.25rem 1.4rem;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

/* Footer */

.site-footer {
  background: #020617;
  border-top: 1px solid rgba(148, 163, 184, 0.4);
  padding: 1.5rem 0;
  margin-top: 2rem;
}

.footer-content {
  font-size: 0.85rem;
  text-align: center;
  color: #9ca3af;
}

.footer-content a {
  color: #fbbf24;
}

/* Responsive tweaks */

@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav {
    margin-top: 0.4rem;
  }

  .main-nav a {
    margin-left: 0;
    margin-right: 1rem;
  }

  .hero {
    padding: 2.4rem 0 2rem;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .blog-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: -1;
  }
}