body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  padding: 40px;
}

.container {
  background-color: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  width: 600px;
}

h1 {
  font-size: 22px;
  color: #333;
  margin-bottom: 20px;
}

button {
  padding: 10px 20px;
  background-color: #1976d2;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #125aa1;
}

pre#console {
  background-color: #1e1e1e;
  color: #00ff90;
  padding: 20px;
  border-radius: 5px;
  margin-top: 20px;
  overflow-x: auto;
  font-family: monospace;
}