body {
  background: #F23E96;
  margin-top: 50vh;
  content: 'Adam';
}

.main {
  width: 400px;
  height: 580px;
  background: #ccc;
  border-radius: 20px;
  margin: 0 auto;
  margin-top: -290px;
  overflow: hidden;
}
.screen{
  width: 380px;
  height: 520px;
  background: #333;
  margin: 0 auto;
  margin-top: 10px;
  border-radius: 3px;
}
.buttons{
  width: 160px;
  height: 40px;
  margin: 0 auto;
  margin-top: 5px;
}
.buttons button{
  display: block;
  float: left;
  border: 0;
  width: 40px;
  height: 40px;
  font-size: 32px;
  color: #111;
  margin: 0;
  background: 0;
  cursor: pointer;
}