body{
    margin: 0;
    background-color: lightgreen;
}
canvas{
    display: block;
    margin: auto;
    border: 2px solid #fff;
    position: absolute;
  top: 0;
  left: 0;
}
#mainMenu {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, #222, #444);
  color: rgb(62, 162, 244);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: Comic Sans MS;
  z-index: 10;
}
#startButton {
  padding: 15px 30px;
  font-size: 1.2em;
  margin-top: 20px;
  cursor: pointer;
  background-color: rgb(36, 231, 218);
  
}
#howtoplay{
  padding: 10px 20px;
  font-size: 1.1em;
  margin-top: 20px;
  cursor: pointer;
  background-color: #444;
  border-color: black;
  border-radius: 6px;
}
.hidden {
    display: none !important;
}
#tutorial{
  position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6); 
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}
#tutorial.show {
  display: flex; 
}
.hidden {
    display: none !important;
}

.popupBox{
  background: rgba(237, 192, 107, 0.684); 
    color: rgb(0, 0, 0);
    width: 600px;
    height: 600px;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    position: relative;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    overflow-y: auto; 
    font-family: 'Comic Sans MS';
}
.closeBtn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: white;
    color: #00d4c4;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    font-weight: bold;
}
.closeBtn:hover {
    background: #eee;
}