body {
  background-color: #101010;
  color: #33ff99;
  font-family: 'Segoe UI', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
.container {
  text-align: center;
}
button {
  background-color: #33ff99;
  border: none;
  padding: 12px 20px;
  margin-top: 20px;
  font-size: 16px;
  cursor: pointer;
}
.footer {
  margin-top: 40px;
  font-size: 12px;
  color: #888;
}