body {
    margin: 0;
    padding: 0;
    background: #000;
    overflow: hidden;
}

.shadow {
    position: relative;
    margin: 3px auto 0;
    padding: 40px;
    display: grid;
    /*if content inside is added */
    align-content: center;
    justify-items: center;
    width: 1815px;
    height: 913px;
  
background-image: url('https://kurziokode.github.io/hack/alley.jpg');




}

.shadow::before,
.shadow::after {
    content: '';
    position: fixed;
    top: -2px;
    left: -2px;
    background: linear-gradient(45deg, #fb0094, #ffff00, #0000ff, #00ff00, #ffff00, #ff0000, #fb0094, #0000ff, #00ff00, #ffff00,
            #ff0000);
    background-size: 400%;
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    z-index: -1;
    animation: animate 30s linear infinite;
}

.shadow::after {
    filter: blur(15px);

}

@keyframes animate {

    0% {
        background-position: 0 0;
    }

    50% {
        background-position: 300% 0;
    }

    100% {
        background-position: 0 0;
    }


}









/* ----------- Non-Retina Screens ----------- */
@media screen 
  and (min-device-width: 1200px) 
  and (max-device-width: 1600px) 
  and (-webkit-min-device-pixel-ratio: 1) { 
}

/* ----------- Retina Screens ----------- */
@media screen 
  and (min-device-width: 1200px) 
  and (max-device-width: 1600px) 
  and (-webkit-min-device-pixel-ratio: 2)
  and (min-resolution: 192dpi) { 
}

/* ----------- Galaxy Tab 2 ----------- */

/* Portrait and Landscape */
@media 
  (min-device-width: 800px) 
  and (max-device-width: 1280px) {

}

/* Portrait */
@media 
  (max-device-width: 800px) 
  and (orientation: portrait) { 

}

/* Landscape */
@media 
  (max-device-width: 1280px) 
  and (orientation: landscape) { 

}

/* ----------- Galaxy Tab S ----------- */

/* Portrait and Landscape */
@media 
  (min-device-width: 800px) 
  and (max-device-width: 1280px)
  and (-webkit-min-device-pixel-ratio: 2) {

}

/* Portrait */
@media 
  (max-device-width: 800px) 
  and (orientation: portrait)
  and (-webkit-min-device-pixel-ratio: 2) { 

}

/* Landscape */
@media 
  (max-device-width: 1280px) 
  and (orientation: landscape)
  and (-webkit-min-device-pixel-ratio: 2) { 

}


/* ----------- Galaxy S3 ----------- */

/* Portrait and Landscape */
@media screen 
  and (device-width: 360px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 2) {

}

/* Portrait */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 2) 
  and (orientation: portrait) {

}

/* Landscape */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 2) 
  and (orientation: landscape) {

}

/* ----------- Galaxy S4, S5 and Note 3 ----------- */

/* Portrait and Landscape */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 3) {

}

/* Portrait */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 3) 
  and (orientation: portrait) {

}

/* Landscape */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 3) 
  and (orientation: landscape) {

}

/* ----------- Galaxy S6 ----------- */

/* Portrait and Landscape */
@media screen 
  and (device-width: 360px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 4) {

}

/* Portrait */
@media screen 
  and (device-width: 360px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 4) 
  and (orientation: portrait) {

}

/* Landscape */
@media screen 
  and (device-width: 360px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 4) 
  and (orientation: landscape) {

}