body {
  background-color: #121212;
  color: white;
  font-family: Arial, sans-serif;
  text-align: center;
  padding-top: 50px;
}
.container {
  max-width: 600px;
  margin: auto;
}
button {
  padding: 10px 20px;
  margin-top: 10px;
  background: #00d1b2;
  border: none;
  color: white;
  cursor: pointer;
}
button:hover {
  background: #007f7f;
}
select, input {
  padding: 8px;
  margin-top: 10px;
  width: 80%;
}