* {
    box-sizing: border-box;
}
.video-background {
    background: #000;
    position: fixed;
    top: 0; right: 0; bottom: 0; left: 0;
    z-index: -99;
}
.video-foreground,
.video-background video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
@media (min-aspect-ratio: 16/9) {
    .video-foreground { height: 300%; top: -100%; }
}
@media (max-aspect-ratio: 16/9) {
    .video-foreground { width: 300%; left: -100%; }
}

.promo-container {
    position: absolute;
    top: 40%;
    left: 0;
    right: 0;
}

.promo-container .promo-header {
    display: block;
    text-align: center;
    color: white;
    font-size: 70px;
    font-family: 'Oswald', sans-serif;
    text-shadow: 0 0 20px #000;
    margin-bottom: 20px;
}

.promo-container #promo-text {
    display: block;
    text-align: center;
    color: white;
    font-size: 40px;
    font-family: 'Oswald', sans-serif;
    text-shadow: 0 0 20px #000;

    padding-left: 0;
    padding-right: 300px;
    opacity: 0;

    transition: all 0.5s ease;
    transition-property: padding, opacity;
}

.promo-container #promo-text.enter {
    padding-left: 0;
    padding-right: 0;
    opacity: 1;
}

.promo-container #promo-text.leave {
    padding-left: 300px;
    padding-right: 0;
    opacity: 0;
}