* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000;
    font-family: Arial, sans-serif;
}

#videos {
    width: 100%;
    height: 100%;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
}

.video-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    scroll-snap-align: start;
    scroll-snap-stop: always;
}

video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.timeline {
    position: absolute;
    z-index: 2;
    left: 3%;
    bottom: 18px;
    width: 94%;
    height: 4px;
    opacity: 0;
    cursor: pointer;
    transition: opacity 0.2s;
}

.timeline.visible {
    opacity: 1;
}

#message {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}