style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@500&display=swap');  /*Fonts uploaded*/
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}
body{
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(45deg, #0a0a0a, #3a4452);
} /*body of whole calculator*/

.calculator{
    border: 1px solid #717377;
    padding: 10px;
    border-radius: 16px;
    background: transparent;
    box-shadow: 0px 3px 15px rgba(0, 0, 0, 0.5);
}
input{
    width: 324px;
    height: 55px;
    border: none;
    padding: 10px;
    margin: -5px;
    background: rgb(5, 198, 176);
    box-shadow: 0px 3px 15px rgbs(84, 84, 84, 0.1);
    font-size: 25px;
    text-align: right;
    cursor: pointer;
    color: #ffffff;
    border-radius: 10px;
}
input::placeholder{
    color: #ffffff;
}
#inputBox{
    color:rgb(255, 255, 255);
}
button{
    border: none;
    width: 60px;
    height: 60px;
    margin: 10px;
    border-radius: 50%;
    background: transparent;
    color: #ffffff;
    font-size: 23px;
    box-shadow: -8px -8px 15px rgba(255, 255, 255, 0.1);
    cursor: pointer;
}
.equalBtn{
    background-color: #fb7c14;
    width: 234px;
    height:60px;
    border-radius: 20px;
} /*Equal Button design*/

.operator{
    color: #6dee0a;
}
.operatorA{
    border: none;
    width: 50px;
    height: 50px;
    margin: 7.7px;
    border-radius: 50%;
    background: transparent;
    color: #6dee0a;
    font-size: 28px;
    box-shadow: -8px -8px 15px rgba(255, 255, 255, 0.1);
    cursor: pointer;
}/*For Hexadecimal buttons*/
.Mode{
    border: none;
    width: 60px;
    height: 60px;
    margin: 10px;
    border-radius: 50%;
    background: transparent;
    color: #ffffff;
    font-size: 23px;
    box-shadow: -8px -8px 15px rgba(255, 255, 255, 0.1);
    cursor: pointer;
}/*For Mode buttons*/