/* --- atmoszféra --- */
.grain{position:fixed;inset:0;pointer-events:none;z-index:50;opacity:.07;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>")}
.glow{position:absolute;border-radius:50%;filter:blur(70px);pointer-events:none;will-change:transform}
.glow.a{width:48vw;height:48vw;max-width:720px;max-height:720px;background:radial-gradient(circle,rgba(255,106,31,.55),rgba(255,106,31,0) 65%);animation:drift 14s ease-in-out infinite alternate}
.glow.b{width:40vw;height:40vw;max-width:600px;max-height:600px;background:radial-gradient(circle,rgba(47,125,246,.45),rgba(47,125,246,0) 65%);animation:drift 18s ease-in-out infinite alternate-reverse}
@keyframes drift{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(6vw,-5vh,0) scale(1.15)}}