body {
  margin: 0;
  font: normal 75% Arial, Helvetica, sans-serif;
}

canvas {
  display: block;
}

#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #000000;
  background-image: url("");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 50% 50%;
}

.heading {
  position: absolute;
  text-align: center;
  top: 40%;
  width: 100%;
}

.heading h1 {
  color: rgb(255, 255, 255);
  font-size: 70px;
}

.nonselectable {
  -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
     -khtml-user-select: none; /* Konqueror HTML */
       -moz-user-select: none; /* Old versions of Firefox */
        -ms-user-select: none; /* Internet Explorer/Edge */
            user-select: none; /* Non-prefixed version, currently
                                  supported by Chrome, Edge, Opera and Firefox */
}