.half-container {
    height: 50%;
    height: 50vh;
}

.full-container {
    height: 100%;
    height: 100vh;
}

.double-container {
    height: 200%;
    height: 200vh;
}

.margin {
    height: 25%;
    height: 25vh;
}

.group {
    position: relative;
    font-size: 0.01em;
    opacity: 0;
}

video {
    min-width: 100%;
    min-height: 100%;

    max-width: 100%;
    max-height: 100%;

    width: auto;
    height: auto;

    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

img {
    height: 90%;
    width: 90%;
    image-orientation: from-image;
    object-fit: cover;
    border-radius: 15px;
    margin-bottom: 10px;
    font-size: 1em;
    border: 3px solid #717171;
}

.row {
    height: 100%;
    width: 60%;
}

.col-4 {
    height: 50%;
}

.group span{
    text-align: center;
}

.center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.play {
    position: fixed;
    z-index: 20;
    top: 5px;
    left: 5px;
    border: 0;
    background: transparent;
    box-sizing: border-box;
    width: 0;
    height: 30px;
    border-color: transparent transparent transparent #717171;
    transition: 100ms all ease;
    cursor: pointer;
    border-style: solid;
    border-width: 15px 0 15px 20px;
}

.play.pause {
    border-style: double;
    border-width: 0px 0 0px 20px;
}

.play:hover,
.play:focus {
    outline: none;
}