style.css

#btn {
  background-color: #2bbf98;
  border: none;
  padding: 5px;
  font-size: 17px;
  color: #ececec;
  padding: 12px 25px;
  margin: 0 auto;
  border-radius: 5px;
  cursor: pointer;
  outline: none;
  display: block;
  text-align: center;
  font-size: 24px;
  letter-spacing: 1.5px;
  font-weight: 700;
  transform-style: preserve-3d;
}

#btn:hover {
  color: #2bbf98;
  background:#d7f2e8;
}

.box {
  width: 550px;
  padding: 40px 50px;
  background-color: #634aaf;
  color:#ececec;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 5px;
  text-align: center;
  font-weight: 400;
  -moz-user-select: none;
  -khtml-user-select: none;
  -webkit-user-select: none;
  font-size: 20px;
}

body {
    background-color: #d7f2e8;
}

main {
    font-size: 20px;
}