Are there any best practises I should know about when using CSS in dynamic-forms?  I have had success adding a <style> tag to the top of the GSML. But I am worried it could cause problem if I have several snippets on a screen and each snippet has its own style block.   Also, I find myself copy/pasting the same style code into multiple snippets.  I would prefer to link to a single stylesheet with something like <link rel="stylesheet" type="text/css" href="mystyle.css">

This is a useful idea. It is better than copy/pasting the same text into each snippet. 

Is there any way to conditionally include a snippet only if it hasn't been included before?  Can a snippet somehow set a flag when it is included and have that flag be checked with a {{#if}} in the spots that conditionally include it?  My concern is I want my snippets to be self contained. I want to be able to view an individual snippet like "player_details" on its own when designing and debugging it. So I want the "player_detail" snippet to include the css snippet so player_details can run on its own. Similarly "players_virtual_goodls" will also need to same CSS and should be able to run on its own. But then when "player_master" includes both "player_detail" and "player_virtual_goolds" I don't want those snippets to include duplicate copies of the CSS. 

I guess "player_master" could pass a param something like  "player_detail?embedded=true" and I could check that flag before including the css snippet. But ideally the css snippet itself would set the flag. Or ideally there would just be a simple way to include a snippet only once. Or some other approach to proving style sheets that doesn't make them a snippet. 

Thanks for your help Steve.  Safe to close.