body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #0b1220;
  color: #ffffff;
}
header, footer {
  padding: 20px;
  background: #101a2e;
  text-align: center;
}
section {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}
a { color: #ffcc00; text-decoration: none; }
.btn {
  display: inline-block;
  padding: 12px 18px;
  background: #ffcc00;
  color: #000;
  border-radius: 6px;
  margin-top: 10px;
}
textarea, input {
  width: 100%;
  padding: 10px;
}