nacl30d/akio

html,body {
    height: 100%;
}


* html .layer_board_bg,
* html .layer_board {
    position: absolute;
}

.layer_board_bg {
    position: fixed;
    width: 100%;
    height: 100%;
    
    z-index: 1000;
    
    top: 0;
    left: 0;
    
    display: none;
    cursor: pointer;
    background: #000;
}

.layer_board {
    width:50%;
    margin:1.5em auto 0;
    padding:10px 20px;
    border:2px solid #aaa;
    background:#fff;

    display: none;
    position: fixed;
    left: 25%;
    
    text-align: center;
    z-index: 2000;
}