body {
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    background-color: #121213;
    color: white;
}

hr {
    width: 500px;
}

#errors {
    color: coral;
}

#board {
    width: 95vw;
    height:auto;
    max-width: 650px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    border-style: solid;
    border-color: black;
}

.tile {
    width: 7.3vw;
    height: 7.3vw;
    max-width: 50px;
    max-height: 50px;
    background-color: #535354;
    /*border: 1px solid #3a3a3c;*/
    /* Text */
    font-size: 20px;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
}

#digits {
    width: 95vw;
    height: 50px;
    max-width: 650px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
}

.number {
    width: 7.3vw;
    height: 7.3vw;
    max-width: 50px;
    max-height: 50px;
    /*border: 1px solid black;*/
    margin: 2px auto;
    background-color: #535354;
    /* Text */
    font-size: 20px;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
}

.number-selected {
    background-color: #e5ad40;
}

.tile-start {
    background-color: #3a3a3c;
}

.gold {
    background-color: #e5ad40;
}

.buttons {
    width: 95vw;
    height:auto;
    max-width: 650px;
    display: flex;
    margin: 40px auto;
    justify-content: space-evenly;
}

.btn {
    padding: 5px 40px;
    vertical-align: middle;
    font-size: 2em;
    border-radius: 10px;
}

.clear {
    background-color: salmon;
}

.submit {
    background-color: #e5ad40;
}