body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #ffffff;
  color: #000000;
  padding: 2rem;
  max-width: 800px;
  margin: auto;
  text-align: center;
}

h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: #000000;
}

button, select {
  font-size: 1rem;
  padding: 0.6em 1em;
  margin: 1em 0.5em;
  border: none;
  border-radius: 5px;
  background-color: #3700ff;
  color: rgb(255, 255, 255);
  cursor: pointer;
}

select {
  background-color: rgb(255, 255, 255);
  color: #333;
  border: 1px solid #ccc;
}

@media (max-width: 600px) {
  button, select {
    width: 100%;
    margin: 0.5em 0;
  }
}