body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f7fa;
  color: #222;
}

header {
  text-align: center;
  background: #fff;
  border-bottom: 1px solid #eee;
  padding: 2em 1em 1em 1em;
}

.logo {
  max-width: 100px;
  margin-bottom: 1em;
}

main {
  padding: 2em 1em;
  max-width: 600px;
  margin: auto;
}

section {
  margin-bottom: 2em;
}

footer {
  background: #fafbfc;
  border-top: 1px solid #eee;
  text-align: center;
  padding: 1em 0;
  font-size: 0.95em;
}