.heading {
    text-align: center;
    margin-top: 20px;
} 

.container{
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

.tbl, .rlt {
    width: 100%;
    max-width: 800px;
    margin: 40px auto;
    padding: 10px;
}

th, td {
    text-align: center;
}

.footer {
    position: absolute;
    bottom: 10px;
}

.footer h3, p {
    display: inline;
    
}


@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    .tbl,
    .rlt {
        margin-top: 20px;
    }

    .heading {
        font-size: 1.4rem;
    }
}


@media (max-width: 900px) {
    .container {
        max-width: 700px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1100px;
    }
}