body {
  margin: 0;
  overflow: hidden;
  font-family: sans-serif;
  background: linear-gradient(to bottom, #87ceeb, #fff);
  text-align: center;
}

#menu {
  padding-top: 150px;
}

button {
  font-size: 24px;
  padding: 15px 30px;
  border: none;
  border-radius: 12px;
  background-color: #007bff;
  color: white;
}

button:hover {
  background-color: #0056b3;
}

.hidden {
  display: none;
}

#gameCanvas {
  background: #ddd;
  width: 100vw;
  height: 70vh;
  display: block;
  margin: auto;
  border: 3px solid black;
}

#score {
  font-size: 24px;
  color: black;
}