html {
  height: 100%;
}

body {
  margin: 0;
}

.bg {
  animation: slide 3s ease-in-out infinite alternate;
  background-image: linear-gradient(-60deg, #6c3 50%, #09f 50%);
  bottom: 0;
  left: -50%;
  opacity: .5;
  position: fixed;
  right: -50%;
  top: 0;
  z-index: -1;
}

.bg2 {
  animation: slide 3s ease-in-out infinite alternate;
  background-image: linear-gradient(-60deg, #09f 50%, #f39415ff 50%);
  animation-direction: alternate-reverse;
  animation-duration: 4s;
}

.bg3 {
  animation: slide 3s ease-in-out infinite alternate;
  background-image: linear-gradient(-60deg, #f39415ff 50%, #f2078fff 50%);
  animation-duration: 5s;
}

.bg4 {
  animation: slide 3s ease-in-out infinite alternate;
  background-image: linear-gradient(-60deg, #f2078fff 50%, #6c3 50%);
  animation-duration: 6s;
}

.bg5 {
  animation: slide 3s ease-in-out infinite alternate;
  background-image: url("../img/stars.png");
  animation-direction: alternate-reverse;
  animation-duration: 4s;
}

.bg6 {
  animation: slide 3s ease-in-out infinite alternate;
  background-image: linear-gradient(-60deg, #09f 50%, #f39415ff 50%);
  animation-direction: alternate-reverse;
  animation-duration: 4s;
}

.bg7 {
  animation: slide 3s ease-in-out infinite alternate;
  background-image: linear-gradient(-60deg, #09f 50%, #f39415ff 50%);
  animation-direction: alternate-reverse;
  animation-duration: 4s;
}

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

.w3-content{position:relative;margin-top:0em;}
.w3-btn,.w3-button{border:none;display:inline-block;outline:0;padding:8px 16px;vertical-align:middle;overflow:hidden;text-decoration:none;color:inherit;background-color:inherit;text-align:center;cursor:pointer;white-space:nowrap}
.w3-btn,.w3-button{-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none} 
.w3-disabled,.w3-btn:disabled,.w3-button:disabled{cursor:not-allowed;opacity:0.3}.w3-disabled *,:disabled *{pointer-events:none}
.w3-bar-block .w3-dropdown-hover .w3-button,.w3-bar-block .w3-dropdown-click .w3-button{width:100%;text-align:left;padding:8px 16px}
.w3-button:hover{color:#000!important;background-color:#ccc!important}

.w3-content button {
position: absolute;
top: 32%;
}

.w3-display-right {right:0}
.w3-display-left {left:0}