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

main {
  margin: 3rem auto 2rem;
  width: 85%;
  max-width: 950px;
  min-height: 600px;
  background: #1e293b;
  border-radius: 10px;
  box-shadow: 0 2px 15px rgba(0, 0, 0, .6);
  overflow: hidden;
}

#title {
  margin: 0;
  padding: 1.5rem;
  text-align: center;
  font-size: 36px;
  background: linear-gradient(90deg, #2563eb, #06b6d4);
  color: #fff;
  border-bottom: 4px solid #0ea5e9;
}

nav {
  background: #1e40af;
  text-align: center;
  padding: .75rem 0;
}

nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  justify-content: center;
}

nav li {
  margin: 0 1rem;
  border-radius: 6px;
  transition: background .3s;
}

nav li:hover {
  background: #2563eb;
}

nav a {
  color: #f1f5f9;
  text-decoration: none;
  padding: .5rem 1rem;
  display: block;
}

article {
  padding: 2rem;
}

article h2 {
  margin-top: 0;
  color: #38bdf8;
}

article p {
  margin-bottom: 1.25rem;
  line-height: 1.6;
  color: #cbd5e1;
}

article a {
  color: #60a5fa;
  text-decoration: underline;
}

article a:hover {
  color: #38bdf8;
}

footer {
  text-align: center;
  padding: 1rem;
  color: #94a3b8;
  border-top: 1px solid #334155;
  background: #0f172a;
}

@media (max-width: 800px) {
  main {
    width: 90%;
    margin-top: 1rem;
  }

  nav ul {
    flex-direction: column;
    align-items: center;
  }

  nav li {
    margin: .5rem 0;
  }
}