.tb_sbox {
    transition: border 0.2s;
}

.tb_sbox:hover {
    box-shadow: #FF0000 0px 0px 3px;
}

.nb_sbox {
    cursor: not-allowed;
    transition: border 0.2s;
}

.nb_sbox:hover {
    box-shadow: #00FF00 0px 0px 3px;
}

#n10 {
    display: none;
}

.boxx {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

button {
    padding: 6px;
    border: 1px solid #FFF;
    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;
    -khtml-border-radius: 10px;
    text-align: center;
    vertical-align: middle;
    border: 1px solid transparent;
    font-weight: 900;
    background-color: rgb(240, 240, 240);
    transition: 0.2s;
}

button:hover {
    background-color: rgb(220, 220, 220);
}

code {
    background-color: #f3f4f4;
    padding: 0 2px 0 2px;
}

.cancell {
    position: absolute;
    right: 0px;
    top: -15px;
    z-index: 1000;
}