html, body {
  width: 100%;
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at center, #b4fec1 5%, #e6ffea 50%, #7efd96 55%, #027e19 85%);
  background-position: center;
  font-family: Roboto;
  animation: gradient 15s ease infinite;
}

.buttons-block {
  display: none;
  justify-content: center;
  flex-direction: row;
  position: absolute;
  width: 100vw;
  bottom: 50%;
  left: 0;
}

.btn {
  flex: 1 1;
  margin: 5% 10%;
  padding: 20px;
  cursor: pointer;
  color: rgba(4, 251, 49, 0.5);
  background-color: transparent;
  text-decoration: none;
  text-align: center;
  font-size: 3em;
  font-weight: bold;
  border: 10px solid rgba(4, 251, 49, 0.5);
  transition: all 0.2s;
}

.btn:hover {
  color: #fff;
  background-color: rgba(4, 251, 49, 0.5);
  border: 10px solid transparent;
}

@media only screen and (max-device-width: 480px) {
    .btn {
      font-size: 1em;
      border: 5px solid rgba(4, 251, 49, 0.5);
      color: #fff;
      background-color: rgba(4, 251, 49, 0.5);
      border: none;
    }

    .btn:hover {
      border: none;
    }
}

.loading {
  padding: 20px;
  margin: auto;
  text-align: center;
  display: block;
  font-size: 3em;
  font-weight: bold;
  color: rgba(255,255,255,0.8);
  background: linear-gradient(-45deg, #fff, #7efd96, #7efd96, #fff);
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
}

.loading {
  padding: 20px;
  text-align: center;
  display: block;
  font-size: 3em;
  font-weight: bold;
  color: rgba(255,255,255,0.8);
  background: rgba(0,0,0,0.1);
  position: absolute;
  left: 0;
  right: 0;
  top: 40%;
}

.another, .header {
  position: absolute;
  display: block;
  width: 100%;
  bottom: 50px;
  margin: auto;
  font-size: 1em;
  font-weight: bold;
  text-align: center;
  color: rgba(4, 251, 49, 0.9);
}

.header {
  top: 50px;
}

.another {
  bottom: 50px;
}

.another a, .header a {
  text-decoration: none;
  color: rgba(4, 251, 49, 0.9);
}

@media only screen and (max-device-width: 480px) {
  .loading {
    font-size: 1em;
  }
}


.container {
  position: absolute;
  display: block;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  background-color: #ccffff;
}

.container canvas {
  position: relative;
  width: 100%;
  height: 100%;
}

.footer {
  position: absolute;
  display: inline;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: 10px;
  color: #014b0f;
  font-size: 12px;
  z-index: 2;
}


@keyframes gradient {
    0% {
        background-size: 100%;
    }
    50% {
        background-size: 150%;
    }
    100% {
        background-size: 100%;
    }
}