body {
  background-color: #111;
  color: #02fe00;
  font-family: 'Courier New', monospace;
  padding: 20px;
}
form {
  max-width: 900px;
  margin: auto;
}
fieldset {
  border: 1px solid #444;
  padding: 15px;
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
legend {
  padding: 0 10px;
  font-weight: bold;
}
input, select {
  width: 48%;
  padding: 8px;
  margin: 6px 0;
  font-family: inherit;
  background-color: #1e1e1e;
  color: #0f0;
  border: 1px solid #444;
  border-radius: 4px;
  font-size: 14px;
}
input::placeholder {
  color: #888;
}
button {
  background-color: #00aa00;
  color: white;
  padding: 10px 25px;
  border: none;
  cursor: pointer;
  font-weight: bold;
  font-size: 15px;
  border-radius: 6px;
  display: block;
  margin: 20px auto;
}
h2 {
  text-align: center;
  margin-bottom: 20px;
}