cal2.css

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

body{
    width:100%;
    height:100vh;
    display:flex;
    justify-content: center;
    align-items: center;
    background:linear-gradient(45deg,#000000,#3a4452)
}

.calculator{
    border:1px solid #717377;
    padding:20px;
    border-radius: 16px;
    background: transparent;
    box-shadow:0px 3px 15px rgba(113,115,119,0.5);
}

input{
    width:100%;
    border:none;
    padding:24px;
    margin:10px;
    background: transparent;
    box-shadow: 0px 3px 15px rgbs(84,84,84,0.1);
    font-size: 40px;
    text-align:right;
    cursor:pointer;
}


input:placeholder{
    color:#fff;
}

button{
    border:none;
    width:60px;
    height:60px;
    margin:10px;
    border-radius: 50%;
    background: transparent;
    color:#e6e0e0;
    font-size: 20px;
    box-shadow: -8px -8px 15px rgba(255,255,255,0.1);
    cursor:pointer;
}

.equalBtn{
    background-color: #fb7c14;
}

.operator{
    color:#6dee0a;
}