* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  color: #222;
  background: #f8f9fb;
  line-height: 1.9;
}

header,
footer {
  padding: 18px 24px;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}

footer {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  border-top: 1px solid #e5e7eb;
  border-bottom: none;
  margin-top: 48px;
}

a {
  color: #2563eb;
}

main {
  max-width: 800px;
  margin: 40px auto;
  padding: 32px;
  background: #fff;
  border-radius: 12px;
}

h1 {
  line-height: 1.4;
}

h2 {
  margin-top: 32px;
  font-size: 1.25rem;
}

@media (max-width: 600px) {
  main {
    margin: 16px;
    padding: 20px;
  }
}