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

padding: 10px;
}

a.button4{
 display:inline-block;
 padding:0.3em 1.2em;
 margin:0 0.1em 0.1em 0;
 border:0.16em solid rgba(255,255,255,0);
 border-radius:2em;
 box-sizing: border-box;
 text-decoration:none;
 font-family:'Roboto',sans-serif;
 font-weight:300;
 color:#FFFFFF;
 text-shadow: 0 0.04em 0.04em rgba(0,0,0,0.35);
 text-align:center;
 transition: all 0.2s;
}
a.button4:hover{
 border-color: rgba(255,255,255,1);
}
@media all and (max-width:30em){
 a.button4{
  display:block;
  margin:0.2em auto;
 }
}


.glow-on-hover {
    width: 80%;
    height: 50px;
    border: none;
    outline: none;
    color: #fff;
    background: #111;
    cursor: pointer;
    position: relative;
    z-index: 0;
    border-radius: 10px;
}

.glow-on-hover:before {
    content: '';
    background: linear-gradient(45deg, #ff0000, #ff7300, #fffb00, #48ff00, #00ffd5, #002bff, #7a00ff, #ff00c8, #ff0000);
    position: absolute;
    top: -2px;
    left:-2px;
    background-size: 400%;
    z-index: -1;
    filter: blur(5px);
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    animation: glowing 20s linear infinite;
    opacity: 0;
    transition: opacity .3s ease-in-out;
    border-radius: 10px;
}

.glow-on-hover:active {
    color: #000
}

.glow-on-hover:active:after {
    background: transparent;
}

.glow-on-hover:before {
    opacity: 1;
}

.glow-on-hover:after {
    z-index: -1;
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: #111;
    left: 0;
    top: 0;
    border-radius: 10px;
}

@keyframes glowing {
    0% { background-position: 0 0; }
    50% { background-position: 400% 0; }
    100% { background-position: 0 0; }
}




.glow-on {

    border: none;
    outline: none;
    color: #fff;
    background-image: url("images/bg5.png");
    cursor: pointer;
    position: relative;
    z-index: 0;
    border-radius: 10px;
}

.glow-on:before {
    content: '';
    background: linear-gradient(45deg, #ff0000, #ff7300, #fffb00, #48ff00, #00ffd5, #002bff, #7a00ff, #ff00c8, #ff0000);
    position: absolute;
    top: -2px;
    left:-2px;
    background-size: 400%;
    z-index: -1;
    filter: blur(5px);
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    animation: glowing 20s linear infinite;
    opacity: 0;
    transition: opacity .3s ease-in-out;
    border-radius: 10px;
}

.glow-on:active {
    color: #000
}

.glow-on:active:after {
    background: transparent;
	
}

.glow-on:before {
    opacity: 1;
}

.glow-on:after {
    z-index: -1;
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: url("images/bg5.png");
    left: 0;
    top: 0;
    border-radius: 10px;
}

@keyframes glowing {
    0% { background-position: 0 0; }
    50% { background-position: 400% 0; }
    100% { background-position: 0 0; }
}