*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: bold;
}
body{
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgb(6, 11, 39);

}
.calculator{
    margin-top: 80px;
    border: 2px solid none;
    border-radius: 20px;
    width: 400px;
    padding: 20px 20px;
    box-shadow: 0 0 25px #a80d0d, 0 0 50px #a80d0d, 0 0 100px #a80d0d, 0 0 280px #a80d0d;
}
#input{
    color: #fff;
    width: 310px;
    padding: 10px;
    margin: 10px;
    background: none;
    border: none;
    border-bottom: 1px solid #eaeaff;
    font-size: 65px;
    text-align: right;
}
#input::placeholder{
    color: #fff;
}
button{
    width: 60px;
    height: 60px;
    margin: 10px;
    border-radius: 30px;
    color: #fff;
    background-color: #000;
    cursor: pointer;
    font-weight: bold;
    font-size: 20px;
}
button:hover{
    background-color: #fff;
    color: #000;
    transition: 0.3s;
}
.operator{
    color: #f67c14;
}
.operator:hover{
    color: #fff;
    background-color: #f67c14;
}
.equal{
    color: #fff;
    background-color: #f67c14;
}