html, body {
  height: 100%;
  margin: 0;
  min-height: 100vh;
  overflow: hidden;
}

body {
  font-family: 'Courier New', Courier, monospace;
}

.main-background {
  position: fixed;
  width: 100%;
  height: 100%;
  z-index: -1;

  background-color:#460080;
  background-image: 
    radial-gradient(at 80% 20%, rgb(88, 0, 44) 0%, transparent 80%),
    radial-gradient(at 40% 80%, rgb(0, 44, 88) 0%, transparent 80%);
  
  background-size: 200% 200%;
  animation: moveBg 15s ease infinite alternate;
}

@keyframes moveBg {
  0%   { background-position: 20% 20%, 80% 80%; }
  50%   { background-position: 80% 20%, 20% 80%; }
  100% { background-position: 50% 50%, 50% 50%; }
}

h1 {
  color: rgb(0, 0, 0);
  text-shadow: 1px 2px 2px rgba(255, 255, 255, 0.103);
  font-family: 'Courier New', Courier, monospace;
  font-size: 30px;
  text-align: center;
}

.page-title {
  color: rgb(0, 0, 0);
  font-family: 'Courier New', Courier, monospace;
  font-size: 44px;
  text-shadow: 1px 2px 2px rgba(255, 255, 255, 0.103);
  font-weight: bold;
}

.back-btn {
  display: inline-block;
  border-radius: 8px;
  background-color: transparent;
  border: none;
  color: #000000;
  text-align: center;
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  text-shadow: 1px 2px 2px rgba(255, 255, 255, 0.103);
  padding: 5px;
  width: 80px;
  cursor: pointer;
  position: fixed;
  top: 10px;
  left: 5px;
  z-index: 10px;
}

.back-btn span {
  display: inline-block;
  position: relative;
  transition: 0.5s;
}

.back-btn span:after {
  content: '\27ea';
  position: absolute;
  opacity: 0;
  left: -10px;
  transition: 0.5s;
}

.back-btn:hover span {
  padding-left: 10px;
}

.back-btn:hover span:after {
  opacity: 1;
  left: 0;
}

.back-btn:link {
  text-decoration: none;
}

.back-btn:hover {
  text-decoration: none;
}

.main-text {
  font-size: 20px;
  font-weight: 600;
  color: black;  
  text-shadow: 1px 2px 2px rgba(255, 255, 255, 0.103);
  text-decoration: none;
}