body {
  background-color:  #1C1C1E;
  display: flex;
  justify-content: center;
}

input {
  width: 517px;
  font-size: 100px;
  text-align: right;
  background-color: black;
  border: 0;
  color: white;
  padding-right: 17px;
}

button {
  border-radius: 100%;
  border: none;
  background-color: #333333;
  color: white;
  font-size: 40px;
  margin: 5px;
  width: 118px;
  height: 118px;
  &:active{
    opacity: 70%;
  }
}

.main {
  margin-top: 50px;
  background-color: black;
  padding: 20px;
  border-radius: 20px;
}

.first-line button {
  background-color: #A6A6A6;
}

#yellow-button {
  background-color: #FF9F0A;
}

#zero-button {
  width: auto;
  height: auto;
  padding: 30px 200px 30px 30px;
  border-radius: 50px;
}

.first-line,
.second-line,
.third-line,
.fourth-line,
.fifth-line {
  display: flex;
  justify-content: center;
}

@media (max-width: 600px) {
  input {
    width: 350px;
    font-size: 70px;
  }

  button {
    width: 90px;
    height: 90px;
    font-size: 25px;
    margin: 3px;
  }

  .main {
    padding: 5px;
  }
  
  #zero-button {
    padding: 10px 150px 10px 20px;
  }
}