* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: sans-serif;
}

#pyramid {
  position: absolute;
  width: 100%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

body {
  padding: 20px;
}

button {
  width: 50px;
  height: 27.5px;
  font-size: 17px;
  margin-bottom: 11px;
}

div {
  text-align: center;
}

@media screen and (max-width: 900px) {
 
  button {
    width: 28px;
    height: 15px;
    font-size: 6.5px;
    margin-bottom: 2.5px;
  } 
}