html {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14pt;
  line-height: 1.3;
}

body {
  width: 800px;
  max-width: 90%;
  margin: 5rem auto;
}

article {
  margin: 5rem 0;
}

section {
  margin: 3rem 0;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: normal;
}

article > h1 {
  font-weight: bold;
}

samp {
  display: block;
  margin: 1em 0;
}

code, kbd {
  color: steelblue;
  font-style: normal;
  font-weight: normal;
}

code.tag::before {
  content: "<";
}

code.tag::after {
  content: ">";
}

ol.instructions {
  background-color: #f2f2f2;
  padding: 1rem 1rem 1rem 2rem;
  color: #666666;
  font-style: italic;
  font-size: 0.8rem;
  line-height: 1.2;
}

ol.instructions > li {
  margin: 0.4rem 0;
}

ol.instructions > li:first-child { margin-top: 0; }
ol.instructions > li:last-child { margin-bottom: 0; }

aside {
  padding: 1rem 2rem;
  color: white;
  background-color: gray;
  font-size: 0.8rem;
  margin: 1em 0;
}

.overflow-example {
  padding: 1rem;
  border: 1px solid gray;
}

.portrait {
  width: 125px;
}

.positioned-element {
  width: 50px;
  height: 50px;
  background-color: #ccc;
}

.static-example,
.relative-example,
.absolute-example,
.fixed-example,
.sticky-example {
  border: 1px solid #999;
  padding: 0 1rem;
}

header{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 200px;
    background: linear-gradient(to bottom, #000000 40%,#0560aa 80%,#7cd4ef 100%);
}

body{
    padding-top: 200px;
}
.launch-button{
    position: absolute;
    left: 50%;
    top: 75%;
    transform: translate(-50%, -50%);
    text-decoration: none;
    background-color: #aa0000;
    color: white;
    font-size: 20px;
    padding: 15px 30px;
    border-radius: 10px;
    padding: 15px 60px 15px 30px;
    transition: transform 0.5s; background-color 0.1s, padding 0.5s, box-shadow 0.1s;
}

.launch-button:hover{
    background-color: #cc0000;
    box-shadow: 0 0 8px #ff0000;
}

.launch-button:active{
    background-color: #750000;
    box-shadow: 0 0 2px #750000;
    transform: translate(-50%, -20%) scale(0.7);
    padding: 15px 30px;
}

.launch-button .rocket{
    position: absolute;
    top: 50%;
    right: 40px;
    transition: transform 0.5s;
}

.launch-button .rocket i{
    position: absolute;
    top: 0;
    left: 0;
}

.launch-button .fa-rocket{
    transform: translate(-50%, -50%) rotate(-45deg);
}

.launch-button .fa-burn{
    transform: translate(-50%, -15%) rotate(180deg) scale(0.1);
    color: orange;
    transition: transform 0.4s;
}

.launch-button:hover .fa-burn{
    transform: translate(-50%, -15%) rotate(180deg) scale(0.4);
}

.launch-button:active .fa-burn{
    transform: translate(-50%, 25%) rotate(180deg) scale(0.8);
}

.launch-button:hover .rocket{
    transform: scale(1.3);
}

.launch-button:active .rocket{
    transform: rotate(-15deg) translate(60px, -140px) scale(3.5);
}

.label{
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: white;
}

.label:hover{
    color: orange;
    text-shadow: 0 0 3px rgb(251, 255, 0, 0.5);
}

.launch-button .label{
    transition: color 0.2s, text-shadow 0.2s;
}

@keyframes burn {
    from { transform: rotate(-7deg); }
    33% { transform: rotate(4deg); }
    66% { transform: rotate(-4deg); }
    to { transform: rotate(7deg); }
}

.launch-button:active .fa-burn::before{
    display: block;
    transform-origin: center bottom;
    animation-name: burn; 
    animation-duration: 0.1s;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}