live - 60fps 1920 x 1080
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Synthwave Grid Run</title>
<style>
:root {
--grid-color: #f0f;
--bg-color: #050114;
--horizon-color: #00ffff;
--sun-color: #ff0055;
--speed: 2s;
}
body {
margin: 0;
overflow: hidden;
background-color: var(--bg-color);
background-image: linear-gradient(to bottom, #110022 0%, var(--bg-color) 40%);
height: 100vh;
perspective: 600px;
}
/* The Sun */
.sun {
position: absolute;
top: 15%;
left: 50%;
transform: translateX(-50%);
width: 300px;
height: 300px;
background: linear-gradient(to bottom, #ffea00 0%, var(--sun-color) 60%, transparent 100%);
border-radius: 50%;
box-shadow: 0 0 50px var(--sun-color);
z-index: 1;
}
/* The Horizon Glow */
.horizon {
position: absolute;
top: 45%;
left: 0;
width: 100%;
height: 50px;
background: var(--horizon-color);
filter: blur(20px);
opacity: 0.5;
z-index: 2;
}
/* The 3D Perspective Plane */
.plane {
position: absolute;
width: 200%;
height: 200%;
bottom: -50%;
left: -50%;
transform-origin: top center;
transform: rotateX(80deg);
z-index: 3;
/* Create the Grid */
background-image:
linear-gradient(to right, var(--grid-color) 2px, transparent 2px),
linear-gradient(to bottom, var(--grid-color) 2px, transparent 2px);
background-size: 80px 80px;
/* Fog effect fading into the horizon */
-webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 60%);
mask-image: linear-gradient(to bottom, transparent 0%, black 60%);
/* The illusion of infinite forward motion */
animation: gridMove var(--speed) linear infinite;
}
@keyframes gridMove {
0% {
background-position: 0 0;
}
100% {
background-position: 0 80px;
/* Must perfectly match background-size height */
}
}
/* Optional: Scanlines overlay */
.scanlines {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.25) 51%);
background-size: 100% 4px;
z-index: 10;
pointer-events: none;
}
</style>
</head>
<body>
<div class="sun"></div>
<div class="horizon"></div>
<div class="plane"></div>
<div class="scanlines"></div>
</body>
</html>About this animation
An infinite, neon-glowing 80s outrun grid rushing towards the camera using strict CSS 3D perspective.
Under the hood
CSS 3D Perspective Masking
A brilliant optical illusion native to CSS. By setting
perspective: 600px on the body and transform: rotateX(80deg) on a flat grid div, the shape maps perfectly to a 3D plane. A mask-image applies a linear gradient to fade the grid out gracefully into the 'horizon' line. 
