*{
    margin:0;
    padding: 0;
    box-sizing: border-box;
}

.container{
    width:100%;
    height: 100vh;
    background-color: bisque;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calculator{
    background-color: #3a4452; 
    border-radius: 10px;
    padding: 20px;
}

h1,p{
    text-align: center;
    color: cornflowerblue;
}

.calculator form button,input{
    border:0;
    outline:0;
    width:50px;
    height:50px;
    border-radius: 10px;
    box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
    background: transparent;
    font-size: 16px;
    color: #fff;
    cursor: pointer;
    margin: 10px;
}

form .display{
    display: flex;
    justify-content: end;
    margin: 20px 0;
}

form .display input{
    text-align: right;
    flex:1;
    font-size: 30px;
    box-shadow: none;
}

.calculator form #equal{
    width: 120px;
    background-color: dodgerblue;
}

.calculator form #clear,#del{
    color: red;
}

.calculator form .operator{
    color: aqua;
}