/* CSS Centering Code with the Universal Selector "*" */ 
body {
  margin: auto;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  overflow: auto;
  background: linear-gradient(315deg, rgba(101,0,94,1) 3%, rgba(60,132,206,1) 38%, rgba(48,238,226,1) 68%, rgba(255,25,25,1) 98%);
  animation: gradient 15s ease infinite;
  background-size: 400% 400%;
  background-attachment: fixed;
}

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

.wave {
  background: rgb(255 255 255 / 25%);
  border-radius: 1000% 1000% 0 0;
  position: fixed;
  width: 200%;
  height: 12em;
  animation: wave 10s -3s linear infinite;
  transform: translate3d(0, 0, 0);
  opacity: 0.8;
  bottom: 0;
  left: 0;
  z-index: -1;
}

.wave:nth-of-type(2) {
  bottom: -1.25em;
  animation: wave 18s linear reverse infinite;
  opacity: 0.8;
}

.wave:nth-of-type(3) {
  bottom: -2.5em;
  animation: wave 20s -1s reverse infinite;
  opacity: 0.9;
}

@keyframes wave {
  2% {
      transform: translateX(1);
  }

  25% {
      transform: translateX(-25%);
  }

  50% {
      transform: translateX(-50%);
  }

  75% {
      transform: translateX(-25%);
  }

  100% {
      transform: translateX(1);
  }
}
* {

text-align: center;

}

/*Alternative CSS Centering Code with the "body" Selector*/

body {

text-align: center;

}

/* Styling */

body {
  margin: auto;
  width: 640px; 
  padding: 10px;
  font-family: 'Lexend Deca', sans-serif; 
  color: rgb(141, 10, 10)
  
}

input {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    box-sizing: border-box;
  }

 
  * {
	font-family: 'Open Sans', 'sans-serif';
  }
  
  html, body {
	overflow: hidden;
  }
  
  ul {
	width: 100%;
	text-align: center;
	margin: auto;
	padding: 0;
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
  }
  
  li {
	display: inline-block;
	margin: 10px;
  }
  
  .download {
	width: 200px;
	height: 60px;
	margin: auto;
	background: black;
	float: left;
	border-radius: 5px;
	position: relative;
	top: 260px;
	left: -290px;
	color: #fff;
	cursor: pointer;
	border: 1px solid #fff;
  }
  
  .download > .fa {
	color: #fff;
	position: relative;
	top: 50%;
	left: 15px;
	transform: translateY(-50%);
  }
  
  .df {
	position: relative;
	left: 0px;
  }
  
  .df {
	top: 10px;
	font-size: 2.00em;
  }
  
  
  .download:hover {
	-webkit-filter: invert(100%);
	filter: invert(100%);
  }


  #stl_cont {
	position: relative;
  left: 70px;
  }