@media (min-width: 600px) {}

----------------------------------------------------

[
	["atrule", [
		["rule", "@media"],
		["punctuation", "("],
		["property", "min-width"],
		["punctuation", ":"],
		" 600px",
		["punctuation", ")"]
	]],
	["punctuation", "{"],
    ["punctuation", "}"]
]

----------------------------------------------------

Checks for at-rules.