CSS absolute positioning dilemma -

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i'm experienced css 1 has me confused - apologies if simple fix.

i attempting theme drupal webform has multiple fieldsets. idea stack fieldsets on top of each other. simple css issue of positioning relatively , absolutely - goes wrong containing div collapses instead of maintaining it's shape.

you can see problem @ http://164.177.146.240/eventbooking5/node/6. set background-color of fieldsets green. containing border has red border , positioned relatively.

when fieldsets positioned absolutely, stack expect containing div collapses , compromises rest of sites styling

i appreciate help.

maybe put height onto containing div using css?

or use javascript grab height of tallest fieldset , make containing div height?

or dynamically each fieldset starting first 1 when move onto anotjher fieldset javascript gets it's height , sets container div height , on.


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