Verify that nested at-rules are reported with the correct order.
[
    [0] : MediaRule
]
[
    [0] : SupportsRule
    [1] : MediaRule
]
[
    [0] : SupportsRule
]
[
    [0] : MediaRule
    [1] : SupportsRule
]
[
    [0] : SupportsRule
    [1] : MediaRule
    [2] : SupportsRule
    [3] : MediaRule
    [4] : SupportsRule
]
[
    [0] : StyleRule
]
[
    [0] : html
]