* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  background: #0c192c;
}

h1 {
  color: white;
  text-shadow: 0 0 10px #000;
  font-family: sans-serif;
  font-weight: 600;
  margin-top: 50%;
  position: absolute;
  text-align: center;
}

#h1-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.footer {
  height: 60px;
  background-color: darkslateblue;
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  opacity: 50%;
}

.imprint {
  font-family: sans-serif;
  color: lightgrey;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 20px;
  cursor: pointer;
}

.container {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.bubbles {
  position: relative;
  display: flex;
  z-index: -100;
}

.bubbles span {
  position: relative;
  width: 30px;
  height: 30px;
  background: #d7e7ff;
  margin: 0 4px;
  border-radius: 50%;
  box-shadow: 0 0 0 10px #d7e7ff44, 0 0 50px #d7e7ff, 0 0 100px #d7e7ff;
  animation: fadein 3s ease-in infinite;
  animation: animate 1s linear infinite;
  animation-duration: calc(600s / var(--i));
}

.bubbles span:nth-child(even) {
  background: #812dff;
  box-shadow: 0 0 0 10px #812dff44, 0 0 50px #812dff, 0 0 100px #812dff;
}

@keyframes fadein {
  0% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}

@keyframes animate {
  0% {
    transform: translateY(100vh) scale(0.3);
  }
  100% {
    transform: translateY(-10vh) scale(0.8);
  }
}

@media screen and (max-width: 600px) {
  .bubbles span {
    width: 10px;
    height: 10px;
    box-shadow: 0 0 0 3px #d7e7ff44, 0 0 5px #d7e7ff, 0 0 10px #d7e7ff;
  }

  h1 {
    margin-top: 150%;
  }
}