find the css

hello, I would like to customize the css of contact form 7 like this filma design : https://www.figma.com/proto/kv6l1FGhhEwdkCZjVOEdr6/Maitre-Volz?node-id=81-3&starting-point-node-id=81%3A3

I tried on my website https://autre.cdlacom.eu/

my difficulties

Make a blank line at the bottom for the form
Put asterix, is there a tag? I inserted an asterix without a tag
Make the text of the labels disappear when you enter the information in the form

thanks

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