body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: #f6f8fb;
  color: #1f2937;
  line-height: 1.65;
}

.container {
  width: min(960px, 92%);
  margin: 0 auto;
}

.hero {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: white;
  padding: 56px 0 40px;
}

.hero h1 {
  margin: 0;
  font-size: 2.3rem;
}

.hero h2 {
  margin: 10px 0 8px;
  font-size: 1.3rem;
  font-weight: 500;
  color: #cbd5e1;
}

.subtitle {
  margin-top: 10px;
  color: #e2e8f0;
}

main {
  padding: 36px 0 56px;
}

section {
  background: white;
  margin-bottom: 22px;
  padding: 24px 26px;
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.08);
}

h3 {
  margin-top: 0;
  color: #0f172a;
  font-size: 1.2rem;
}

h4 {
  margin-bottom: 8px;
  color: #1d4ed8;
}

p {
  margin: 0 0 14px;
}

ul {
  margin-top: 8px;
  padding-left: 22px;
}

li {
  margin-bottom: 8px;
}

pre {
  background: #e5e7eb;
  padding: 14px;
  border-radius: 10px;
  overflow-x: auto;
  font-size: 0.95rem;
}

code {
  background: #eef2ff;
  padding: 2px 6px;
  border-radius: 6px;
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  color: #6b7280;
  padding: 24px 0 36px;
}