*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    background-color:wheat;
}

.calculator{
    margin: auto;
    height: 300px;
    width: 20%;
    background-color: whitesmoke;
    margin-top: 30px;
    border-radius: 15px;
}
#inp_box{
    height: 50px;
    width: 80%;
    border: none;
    border-radius: 20px;
    margin-left: 20px;
    margin-top: 20px;
    outline: none;
    font-size: 20px;
    text-align: right;
    padding: 10px;
    
}
button{

    height:33px;
    width:33px;
    background: #e0e0e0;
      border: none;
      border-radius: 50%;
      box-shadow: 8px 8px 16px #bebebe,
                  -8px -8px 16px #ffffff;
      margin-left: 10px;
      margin-top: 10px;
      font-size: 14px;
      font-weight: 700;
      color: #333;
      cursor: pointer;
      transition: all 0.2s ease-in-out;

}
#equal{
    height: 33px;
    width: 40%;
    border-radius: 20px;
    background-color: #eeb23b;
}
input::placeholder{
    color: #333;
}