body {
  font-family: system-ui, sans-serif;
  background-color: #f4f4f4;
  color: #222;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header, footer {
  background: #fff;
  text-align: center;
  padding: 2em 1em;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

h1 {
  font-size: 2em;
  margin-bottom: 0.2em;
}

main {
  max-width: 700px;
  margin: 2em auto;
  padding: 1em;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

a {
  color: #0077cc;
  text-decoration: none;
  font-weight: 600;
}

a:hover {
  text-decoration: underline;
}

footer {
  font-size: 0.9em;
  color: #555;
  margin-top: 3em;
}