Mobile - Filter: Filter-button is behind the menu

[www.HDsports.at]

hey,

i have troubles with the filter module (example: www.hdsports.at/laufkalender) in mobile devices

as you can see in the screenshot, the filter-button is behind the top-menu. so the user cant use the filter. i want to place the filter-button on the bottom (unter "Bewerbe")

but i dont know, where i can make these changes. can anyone help me, where i can do these changes?

Best regards, tom

[Alejandro]

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[www.HDsports.at]

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