body,html {
    margin: 0;
    background-color: #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#app {
	width: 100%;
	max-width: 940px;
	height: 100%;
	max-height: 600px;
}

#ad-box {
    width: 100%;
    height: 100%;
    position: fixed;
    display: none;
    z-index:5;
    pointer-events: none;
}

#ad-box .wrapper {
    width: inherit;
    height: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
}

#ad-box.show {
    display: inline-block;
    pointer-events: auto;
}