body{
    margin-left: 100px;
    margin-right: 100px;
}

/* .marker{
    position: relative;
    width: 100%;
} */

video{
    position: relative;
    top: 0;
    left: 50%;
    transform: translate(-50%, 0%);
    text-align: center;
}


img.QR-img{
    width: 300px;
    height: 300px;
    position: relative;
    top: 0%;
    left: 50%;
    transform: translate(-50%, 0%);
    text-align: center;
}


.box {
    position: relative;
    padding:0.25em 1em;
}
.box:before,.box:after{ 
    content:'';
    width: 20px;
    height: 30px;
    position: absolute;
    display: inline-block;
}
.box:before{
    border-left: solid 1px #5767bf;
    border-top: solid 1px #5767bf;
    top:0;
    left: 0;
}
.box:after{
    border-right: solid 1px #5767bf;
    border-bottom: solid 1px #5767bf;
    bottom:0;
    right: 0;
}
.box p {
    margin: 0; 
    padding: 0;
}

div.img-tracking{
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap :wrap;
}
img.nyanko1{
    height: 400px;
    object-fit: cover; 
    margin-bottom: 50px;
}
img.nyanko3{
    height: 400px;
    object-fit: cover; 
}