style.css

body {
  overflow: hidden;
}

canvas {
  display: block;
  vertical-align: bottom;
} /* ---- particles.js container ---- */
#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom right,
    #6cf3f5,
    #91cefb,
    #b7b3ce,
    #efaed0,
    #f1b8fc
  );
  background-repeat: no-repeat;
  background-size: 100%;
  background-position: 50% 50%;
} /* ---- stats.js ---- */
.count-particles {
  background: transparent;
  position: absolute;
  top: 48px;
  left: 0;
  width: 80px;
  color: #ffffff;
  font-size: 0.8em;
  text-align: left;
  text-indent: 4px;
  line-height: 14px;
  padding-bottom: 2px;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 2px;
}
.js-count-particles {
  font-size: 2px;
}
#stats,
.count-particles {
  -webkit-user-select: none;
  margin-top: 0px;
  margin-left: 0px;
}
#stats {
  display: flex;
  border-radius: 1px 2px 0 0;
  overflow: hidden;
}
.count-particles {
  border-radius: 0 0 3px 3px;
}

.spacecat {
  display: flex;
  position: absolute;
  margin: 200px 0px 0px 500px;
  animation: rotation 7s infinite linear;
}

@keyframes rotation {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(359deg);
  }
}

@media screen and (max-width: 768px) and (min-width: 280px) {
  body {
    overflow-x: hidden;
    overflow-y: hidden;
  }

  .spacecat {
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-left: 20px;
    margin-top: 200px;
  }

  #particles-js {
    position: absolute;
    display: flex;
    width: 100%;
    height: 100vh;
    background: linear-gradient(
      to bottom left,
      #6cf3f5,
      #91cefb,
      #b7b3ce,
      #efaed0,
      #f1b8fc
    );
    background-repeat: no-repeat;
    background-size: 100%;
    background-position: 50% 50%;
  }
}