* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  overflow: hidden;
  width: 100%;
  height: 100vh;
}
#particles-js {
  width: 100%;
  height: 100%;
  background: #000;
  background: linear-gradient(45deg, #e91e63, #ff9800);
}