body, html {
    margin: 0;
    padding: 0;
    height: 100%;
}

.app-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.background-image {
    width: 100%;
    height: auto;
}

.controls {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background-color: rgba(255, 255, 255, 0.7);
    padding: 10px;
    border-radius: 5px;
}

#play-pause-button {
    margin-right: 10px;
}