@keyframes gradient{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}.particles{background-image:radial-gradient(circle,white 2px,transparent 2px);background-size:80px 80px;animation:particleAnimation 20s linear infinite;opacity:0.15}@keyframes particleAnimation{from{transform:translateY(0)}to{transform:translateY(-1000px)}}