* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: #f4f6f8;
  color: #1f2933;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}
main {
  width: 100%;
  max-width: 640px;
  background: #ffffff;
  border: 1px solid #d9dee3;
  border-radius: 8px;
  padding: 32px;
}
h1 {
  margin: 0 0 16px;
  font-size: 1.5rem;
  line-height: 1.3;
}
p { margin: 0 0 16px; }
a { color: #0b5cad; }
footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid #d9dee3;
  font-size: 0.875rem;
  color: #52606d;
}
footer p { margin: 0 0 8px; }
footer p:last-child { margin-bottom: 0; }