style.css

html {
  box-sizing: border-box; }

*,
*:before,
*:after {
  box-sizing: inherit;
  margin: 0;
  padding: 0; }

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

body {
  width: 100%;
  height: 100%;
  background-color: #222;
  background-image: url("https://drive.google.com/uc?export=view&id=0BzFF7FmbJUo5X0NEUXFVd0NBcWc");
  background-size: cover;
  background-position: 0 0;
  background-repeat: no-repeat;
  position: relative;
  z-index: 0; }
  body:after {
    content: "";
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.1);
    z-index: 1;
    animation: thunder-bg 6s infinite; }

canvas {
  display: block;
  position: absolute;
  top: 0;
  left: 0; }

#canvas3 {
  z-index: 2; }

#canvas2 {
  z-index: 3; }

#canvas1 {
  z-index: 4; }

@-webkit-keyframes thunder-bg {
  0% {
    background-color: rgba(34, 34, 34, 0.9); }
  9% {
    background-color: rgba(34, 34, 34, 0.9); }
  10% {
    background-color: rgba(59, 59, 59, 0.3); }
  10.5% {
    background-color: rgba(34, 34, 34, 0.9); }
  80% {
    background-color: rgba(34, 34, 34, 0.9); }
  82% {
    background-color: rgba(59, 59, 59, 0.3); }
  83% {
    background-color: rgba(34, 34, 34, 0.9); }
  83.5% {
    background-color: rgba(59, 59, 59, 0.3); }
  100% {
    background-color: rgba(34, 34, 34, 0.9); } }

* {
  padding: 0;
  margin: 0; }

html {
  cursor: url(../assest/cursor.cur), auto;
  font-family: "Roboto", sans-serif; }

.dev-text {
  font-size: 12px;
  color: red; }

.button {
  position: absolute;
  z-index: 5;
  border: 0;
  background: transparent;
  box-sizing: border-box;
  width: 0;
  top: 20px;
  left: 20px;
  height: 40px;
  outline: none;
  cursor: url(../assest/cur-pointer.cur), auto;
  border-color: transparent transparent transparent orange;
  transition: 0.3s;
  border-style: solid;
  border-width: 20px 0 20px 40px; }
  .button.paused {
    border-style: double;
    border-width: 0px 0 0px 40px; }
  .button:hover {
    border-color: transparent transparent transparent #996300; }

.container {
  z-index: 5;
  position: absolute;
  width: 80%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%); }

.link-list {
  text-align: center;
  list-style: none;
  display: flex;
  height: 70vh;
  flex-direction: column;
  justify-content: space-between; }
  .link-list a {
    cursor: url(../assest/cur-pointer.cur), auto;
    display: block;
    text-decoration: none;
    font-size: 25px;
    color: gray;
    transition: all 0.2s ease-in-out; }
    .link-list a:hover {
      color: orange;
      transform-origin: center;
      transform: scale(1.05); }

@media (max-width: 767px) {
  .container .link-list a {
    font-size: 14px; }
  .button {
    top: 20px;
    left: 20px;
    height: 26px;
    border-width: 13px 0 13px 26px; }
    .button.paused {
      border-style: double;
      border-width: 0px 0 0px 25px; } }