.content{
    height: 100%;
    width: 100%;
    margin: 0;
    -ms-overflow-style: none; //IE and Edge
    scrollbar-width: none; //Firefox
}
.content::-webkit-scrollbar{
    display:none; //Chrome and Safari
}

.area {
    width: 100%;
    float: left;
    padding: 2px;
    box-sizing: border-box;
    -webkit-tap-highlight-color:rgba(0,0,0,0);
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.button {
    height: 100%;
    width: 100%;
    float: left;
    cursor: pointer;
    position: relative;
    border: 2px solid #232323;
    border-radius: 5vmin;
    border-radius: 5dvmin;
    box-sizing: border-box;
}
.button:active { background-color: #FFF100; }
.text {
    white-space: nowrap;
    position: absolute;
    top: 50%;
    left :50%;
    transform: translate(-50%,-50%);
}