style.css

*{
    padding: 0;
    margin: 0;
}

.container{
    text-align: center;
    margin-top: 20vh;
}

.tables{
    display: inline-block;
    margin-top: 15px;
    /* background-color: rgb(226, 218, 200); */
    background-color: black;
    /* border: 1px solid black; */
    border-radius: 5px;
    padding: 10px;
}

table{
    margin: auto;    
}

input{
    font-size: 16px;
    height: 30px;
    width: 212px;
    border: 1px solid black;
    border-radius: 5px;
    padding-right: 4px;
    margin-bottom: 2.5px ;
    margin-top: 3px;
    text-align: right;
}
button{
    font-size: 20px;
    border: 1px solid black;
    border-radius: 5px;
    /* background-color: rgb(195, 196, 190); */
    background-color: rgba(255, 255, 255, 0.959);
    height: 40px;
    width: 50px; 
    margin: 2px;
}
button:active{
    background-color: red; 
}