.hero {
  margin-bottom: 30px;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 10px;
}

.hero p {
  font-size: 1.1rem;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}

header {
  background: #111827;
  border-bottom: 1px solid #334155;
  padding: 20px 30px;
}

nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

nav a {
  color: #e2e8f0;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  color: #93c5fd;
}

nav a.active {
  color: #93c5fd;
  border-bottom: 2px solid #93c5fd;
  padding-bottom: 4px;
}

main {
  max-width: 900px;
  margin: 60px auto;
  padding: 0 20px;
}

.card {
  background: #111827;
  border: 1px solid #334155;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

h1, h2 {
  margin-top: 0;
}

p, li {
  line-height: 1.7;
  color: #cbd5e1;
}

ul {
  padding-left: 20px;
}

footer {
  margin-top: 60px;
  padding: 20px 30px;
  border-top: 1px solid #334155;
  color: #94a3b8;
  text-align: center;
}