style.css

body, html {
    height: 100%;
}

.title {
    display: inline-block;
    margin-right: 15px;
    margin-left: 15px;
}
.game-board-table {
    margin-top: 10px;
    margin-bottom: 10px;
}

#solveSpeed {
    width: 75px;
}

#msgDiv {
    font-size:120%;
    height: 30px;

}
.greenText {
    color: #00cc00;
}
.redText {
    color: #ff0000;
}

td:first-child {
    border-left:solid;
}
td:nth-child(3n) {
    border-right:solid ;
}
tr:first-child {
    border-top:solid;
}
tr:nth-child(3n) td {
    border-bottom:solid ;
}

.game-cell{
    height: 57px;
    border: 1px solid black;
}

.game-cell.highlight {
    background-color: #ffff80;
}

.cellInput{
    height: 100%;
    width: 100%;
    font-size: 120%;
    text-align: center;
    border: 0px;
}

.solveOne, .clearPuzzle {
    margin-left: 20px;
}

.load.btn {
    margin-bottom: 10px;
}

.container-fluid {
    min-height: 100%;
    overflow: auto;
    padding-bottom: 62px; /* this needs to be bigger than footer height*/
}

.navbar.navbar-bottom {
    position: relative;
    margin-top: -52px; /* negative value of footer height */
    margin-bottom: 0px;
    clear:both;
}

@media (max-width: 991px) {
    #descriptionBtn {
        margin-left: 15px;
        margin-right: 15px;
        margin-bottom: 15px;
    }
}

@media (min-width: 992px) {
    #descriptionBtn {
        float: right;
        margin-top: 20px;
        margin-right: 15px;
    }
}