html,
body {
  margin: 0;
  padding: 0;
}

body {
  background-color: #000;
}

body::before,
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

body::before {
  z-index: 1;
  background-image:
    radial-gradient(circle at 10px 20px, rgba(255, 255, 255, 0.6) 0.8px, transparent 1.8px),
    radial-gradient(circle at 80px 30px, rgba(255, 255, 255, 0.6) 1px, transparent 2px),
    radial-gradient(circle at 150px 100px, rgba(255, 255, 255, 0.6) 1.2px, transparent 2.2px),
    radial-gradient(circle at 50px 140px, rgba(255, 255, 255, 0.6) 0.9px, transparent 1.9px),
    radial-gradient(circle at 180px 60px, rgba(255, 255, 255, 0.6) 1px, transparent 2px),
    radial-gradient(circle at 30px 80px, rgba(255, 255, 255, 0.6) 0.7px, transparent 1.7px);
  background-repeat: repeat;
  background-size: 250px 250px;
  opacity: 0.4;
  animation:
    twinkle-slow 4s ease-in-out infinite alternate,
    drift-before 100s linear infinite;
}

body::after {
  z-index: 2;
  background-image:
    radial-gradient(circle at 10px 20px, rgba(255, 255, 255, 0.6) 0.8px, transparent 1.8px),
    radial-gradient(circle at 80px 30px, rgba(255, 255, 255, 0.6) 1px, transparent 2px),
    radial-gradient(circle at 150px 100px, rgba(255, 255, 255, 0.6) 1.2px, transparent 2.2px),
    radial-gradient(circle at 50px 140px, rgba(255, 255, 255, 0.6) 0.9px, transparent 1.9px),
    radial-gradient(circle at 180px 60px, rgba(255, 255, 255, 0.6) 1px, transparent 2px),
    radial-gradient(circle at 30px 80px, rgba(255, 255, 255, 0.6) 0.7px, transparent 1.7px);
  background-repeat: repeat;
  background-size: auto;
  opacity: 0.5;
  animation:
    twinkle-fast 3s linear infinite,
    drift-after 80s linear infinite;
}

@keyframes twinkle-slow {

  0%,
  100% {
    opacity: 0.3;
  }

  50% {
    opacity: 0.25;
  }
}

@keyframes twinkle-fast {

  0%,
  100% {
    opacity: 0.3;
  }

  50% {
    opacity: 0.35;
  }
}

@keyframes drift-before {
  0% {
    background-position: 0 0;
  }

  25% {
    background-position: 50px 100px;
  }

  50% {
    background-position: -75px 50px;
  }

  75% {
    background-position: 100px -25px;
  }

  100% {
    background-position: 0 0;
  }
}

@keyframes drift-after {
  0% {
    background-position: 0 0;
  }

  25% {
    background-position: -40px 75px;
  }

  50% {
    background-position: 60px -50px;
  }

  75% {
    background-position: -100px 40px;
  }

  100% {
    background-position: 0 0;
  }
}

#event-list {
  position: relative;
  z-index: 3;
  list-style: none;
  padding: 5vb;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#event-list li {
  margin-bottom: 10vb;
  text-align: center;
}

#event-list img {
  display: relative;
  max-width: 50%;
  margin: 1vb;
  border: 5px solid #000;
  outline: 2px solid rgba(255, 255, 255, 0.8);
}

#event-list h3,
#event-list form {
  margin: 0;
  color: #fff;
}

#event-list h4 {
  margin: 1vb;
  color: #fff;
}

form {
  display: flex;
  flex-direction: column;
  align-items: center;
}

input {
  margin: 1vb;
  color: #000;
  text-align: center;
}

input[type=text], input[type=email] {
  border: 3px solid #000;
  outline: 1px solid rgba(255, 255, 255, 0.8);
}

input::placeholder {
  text-align: center;
}

input[type=submit] {
  border: 1px solid #000;
  outline: 1px solid rgba(255, 255, 255, 0.8);
}