styles.css

body{
    font-family: 'Roboto', 'sans-serif';
    width: 100%;
    height: 100vh;
    justify-content: center;
    align-items: center;
    background: linear-gradient(45deg, rgba(0, 0, 0, 0.288), rgb(0, 0, 0));

}

.container{
    border: 1px solid white;
    padding: 20px;
    border-radius: 16px;
    background: transparent;
    box-shadow: 0px 3px 15px white;
    width: 340px;
    padding: 20px;
    margin: 20px;
    margin-left: 500px;
}


#textinput{
    width: 270px;
    border: none;
    padding: 24px;
    margin: 10px;
    background: transparent;
    box-shadow: 0px, 3px, 15px, white;
    font-size: 40px;
    text-align: right;
    cursor: pointer;
    color: white;
}
#textinput::placeholder{
    color:whilte;
}
button{
    border: none;
    width: 60px;
    height: 60px;
    margin: 10px;
    border-radius: 50%;
    color: white;
    font-size: 20px;
    background: transparent;
    box-shadow: -8px -4px 15px white;
    cursor: pointer;
}
button:hover{
    box-shadow: -9px -5px 15px white;
}

.equal-button{
    background-color: orangered;
}

.button-operators{
    background-color: skyblue;

}