Acid Rain

I solved it on April 18, 2022. You can try to beat my record on CSSBattle!

218 chars

<body bgcolor=0B2429><p c><p b><p a><style>p{position:absolute;padding:60;background:#F3AC3C;border-radius:50%}[a],[b]{border-top-right-radius:0}[a]{margin:142 72}[b]{background:#998235;margin:82 132}[c]{margin:22 192}

Not much trick here, it's using absolute positioning.

I can imagine that a solution with rotations could be shorter.