*{
    box-sizing: border-box;
    margin : 0;
    padding: 0;
    background-color: #ecf0f3;
    font-family: 'Roboto', sans-serif;
}
.container{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    /* border : 2px soild red; */
}
.calculator{
    /* border: 2px solid red; */
    background-color: #ecf0f3;
    padding: 18px;
    border-radius: 30px;
    box-shadow: inset 5px 5px 12px #ffffff,
                      5px 5px 12px rgba(0,0,0,.16);
    display : grid;
    grid-template-columns: repeat(4,80px);
}
input{
    /* border : 2px solid red; */
    grid-column: span 4;
    height: 70px;
    width: 300px;
    background-color: #ecf0f3;
    box-shadow: inset -5px -5px 12px #ffffff,
                       5px 5px 12px rgba(0,0,0,.16);
    border : none;
    border-radius : 30px;
    color: rgb(70, 70, 70);
    font-size: 50px;
    text-align: end;
    margin : auto;
    margin-top: 40px;
    margin-bottom: 30px;
    padding: 20px;

}

button{
    /* border : 2px solid red; */
    height: 48px;
    width: 48px;
    background-color: #ecf0f3;
    box-shadow: inset -5px -5px 12px #ffffff,
                       5px 5px 12px rgba(0,0,0,.16);
    border : none;
    border-radius: 50%;
    margin : 8px;
    font-size: 16px;

}
.equal{
    background-color: greenyellow;
}
#danger{
    background-color: red;
}
#clear{
    background-color: blue;
}