body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  background: #f8fafc;
  color: #1e293b;
  line-height: 1.7;
}

.container {
  max-width: 900px;
  margin: auto;
  padding: 20px;
}

.hero {
  background: linear-gradient(135deg,#0f172a,#1e293b);
  color: white;
  padding: 80px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.subtitle {
  opacity: 0.85;
}

.nav {
  background: white;
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 0;
}

.nav-inner {
  display: flex;
  gap: 20px;
  overflow-x: auto;
}

.nav a {
  text-decoration: none;
  color: #334155;
  font-size: 0.9rem;
  padding: 12px 0;
}

.nav a:hover {
  color: #0ea5e9;
}

.article h2 {
  margin-top: 60px;
  font-size: 1.6rem;
}

.article p {
  margin: 16px 0;
}

ul {
  padding-left: 20px;
}

.footer {
  margin-top: 60px;
  background: #0f172a;
  color: white;
  text-align: center;
  padding: 30px;
  font-size: 0.9rem;
}