* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: #01010f;
  color: #00ffff;
  font-family: 'Press Start 2P', monospace;
  text-align: center;
  height: 100vh;
  overflow: hidden;
  z-index: 1000;
  
}
body::before {
    content: "";
	position: fixed;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	z-index: 1000;
    pointer-events: none;
    background-image: url('overlay.png');
    background-repeat: all;
    background-position: 0px 0px;
    animation-name: Static;
    animation-duration: 2s;
    animation-iteration-count: infinite;
    animation-timing-function: steps(4);
    box-shadow: inset 0px 0px 10em rgba(0,0,0,0.4);
}
body:after {
	content: "";
	position: fixed;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	pointer-events: none;
	z-index: 1000;
	background-image: url('overlay2.png');
	background-repeat: all;
	background-position: 0px 0px;
	animation-name: Static;
	animation-duration: 0.8s;
	animation-iteration-count: infinite;
	animation-timing-function: steps(4);
}

@keyframes Static {
	0% { background-position: 0px 0px; }
	100% { background-position: 0px 4px; }
}
#container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
#background {
    background-image: url('placeholder.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center bottom;
    filter: brightness(0.5);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}
.button_menu {
    display: block;
    width: 200px;
    margin: 0.5rem auto;
    padding: 0.5rem 0;
    background: transparent;
    border: 1px solid #00ffff;
    color: #00ffff;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.7rem;
    text-shadow: 0 0 5px #00ffff;
    transition: all 0.2s ease;
}
.button_menu:hover {
    background-color: #00ffff;
    color: #01010f;
    text-shadow: none;
}