body{
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Courier New', Courier, monospace;
}

.calc{
    background: darkcyan;
    color: aliceblue;
    padding: 20px;
    border-radius: 10px;
}

.input{
    width: 100%;
    font-size: 20px;
    height: 30px;
    border: none;
    outline: none;
    border-radius: 5px;
    background-color: aliceblue;
}

#payment{
    font-weight: 600;
    font-size: 20px;
}