p {
    margin: 0.5rem;
    text-align: center;
}

p:first-child {
    margin-top: 15px;
}

#resume {
    display: none;
}

.time {
    font-weight: 20px;
}

.time .minutes,
.time .seconds {
    margin: 0 -2px;
}

.time .colon {
    position: relative;
    bottom: 1px;
    margin: 0 -2px;
}

.adjust {
    width: 400px;
    margin: auto;
    text-align: center;
}

.adjust .difficulty {
    width: 150px;
}

.immutable {
    font-weight: bold;
}

.numbers-bar {
    width: 475px;
    margin: 5px auto;
    box-sizing: border-box;
}

.numbers-bar .number {
    background-color: #ffddbb;
    /* float: left; */
    border: 1px solid #000;
    height: 50px;
    width: 50px;
    box-sizing: content-box;
    font-size: 30px;
    text-align: center;
}

.numbers-bar .number:nth-child(3),
.numbers-bar .number:nth-child(6) {
    margin-right: 3px;
}

.numbers-bar .number:hover {
    background-color: #BBDDFF;
}

.sudoku {
    width: 475px;
    margin: auto;
}

.sudoku .square {
    float: left;
    border: 1px solid #000;
}

.sudoku .square .cell {
    float: left;
    position: relative;
    height: 50px;
    width: 50px;
    background: #fff;
    border: 1px solid #000;
    box-sizing: content-box;
}

.sudoku .square .cell:hover {
    background-color: #BBDDFF;
}

.sudoku .square .cell:hover .label {
    color: #333;
}

.sudoku .square .cell.selected {
    background-color: #76A8FF;
}

.sudoku .square .cell.selected .label {
    color: #333;
}

.sudoku .square .cell.error {
    background-color: #E58080;
}

.sudoku .square .cell.valid {
    background-color: #95E595;
}

.sudoku .square .cell .label {
    position: absolute;
    color: #aaa;
    top: 1px;
    left: 2px;
    font-size: 12px;
}

.sudoku .square .cell .value {
    display: block;
    font-size: 30px;
    color: #000;
    width: 100%;
    height: 100%;
    text-align: center;
}

.sudoku .square .cell:nth-child(3n+1) {
    clear: both;
}

@media screen and (max-width: 736px) {
    .numbers-bar .number {
        float: left;
    }
}