body {
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9fafb;
  color: #111827;
}

header {
  background: linear-gradient(135deg, #1e4aaa, #0f276a);
  color: white;
  padding: 2rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
}

header p {
  margin-top: .5rem;
  font-size: 1.2rem;
  opacity: 0.9;
}

main {
  max-width: 900px;
  margin: 2rem auto;
  padding: 1rem;
}

.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,.05);
  padding: 2rem;
  margin-bottom: 2rem;
}

.card h2 {
  margin-top: 0;
  font-size: 1.5rem;
  color: #1f2937;
}

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

.endpoints li {
  padding: .75rem 1rem;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  margin-bottom: .75rem;
  background: #f3f4f6;
}

footer {
  text-align: center;
  padding: 2rem;
  font-size: .9rem;
  color: #6b7280;
}

.btn {
  display: inline-block;
  background: #2563eb;
  color: white;
  padding: .6rem 1.2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
}

.btn:hover {
  background: #1e40af;
}