Uncaught SyntaxError: Unexpected token '{' (at style.css:1:4)

I’m trying to use a stylesheet. However, I keep getting this error:
"Uncaught SyntaxError: Unexpected token ‘{‘ (at style.css:1:4)"

My html

My css

I’ve tried moving the ‘{‘ to the next line (which worked) but then it says:
"Uncaught SyntaxError: Unexpected token ‘:’ (at style.css:3:11)"

>Solution :

in your HTML use <link rel="stylesheet" href="../css/style.css"> instead.
CSS Styles are not scripts