.center1{
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
  border-radius: 4px;
  padding: 3px;
  
    border-radius: 8px;
    max-width: 100%;
  height: auto;
  

}

.center2{
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
  border-radius: 4px;
  padding: 3px;
  border-radius: 8px;
  max-width: 100%;
  height: auto;
  
}
.center3{
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
  border-radius: 4px;
  padding: 3px;
  border-radius: 8px;
  max-width: 100%;
  height: auto;
  
}


html {
  height:100%;
}

body {
  margin:0;
}

.bg {
  animation:slide 3s ease-in-out infinite alternate;
  background-image: linear-gradient(-60deg, rgb(79, 77, 77) 50%, rgb(153, 233, 173) 50%);
  bottom:0;
  left:-50%;
  opacity:.5;
  position:fixed;
  right:-50%;
  top:0;
  z-index:-1;
}

.bg2 {
  animation-direction:alternate-reverse;
  animation-duration:4s;
}

.bg3 {
  animation-duration:5s;
}

.content {
  background-color:rgba(255,255,255,.8);
  border-radius:.25em;
  box-shadow:0 0 .25em rgba(0,0,0,.25);
  box-sizing:border-box;
  left:50%;
  padding:10vmin;
  position:fixed;
  text-align:center;
  top:50%;
  transform:translate(-50%, -50%);
}

h1 {
  font-family:monospace;
}

@keyframes slide {
  0% {
    transform:translateX(-25%);
  }
  100% {
    transform:translateX(25%);
  }
}


.card {


  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  max-width:max-content;
  margin: auto;
  text-align: center;
  font-family: arial;
}

.price {
  font-weight: 600;
  color: rgb(174, 14, 14);
  font-size: 22px;
}

.card button {
  border: none;
  outline: 0;
  padding: 12px;
  color: white;
  background-color: #000;
  text-align: center;
  cursor: pointer;
  width: 100%;
  font-size: 18px;
}

.card button:hover {
  opacity: 0.7;
}

.glow-on-hover {
  width: 220px;
  height: 50px;
  border: none;
  outline: none;
  color: #fff;
  background: rgb(204, 21, 21);
  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: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;transition: 0.4s linear
}

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