css on content page

Hi Atul,

the error is very accurate and supposed to occur as you're placing your tag at the wrong place. you should use the first content placeholder which is placed inside to put your styles. see your modified home page code below:
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Home Page.aspx:
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try to write your style css code within




because it is the head section of master page so you have to add your styles in this tag only.

if you write your styles within



 
This is the body section so it will show error.

if any problem reply