@media only screen and (max-width: 539px) {
  .container {
    max-width: 335px;
  }
}

.particles-js-canvas-el {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
}


#particles-js .header{
    z-index: 5;
    position: relative;
}