CSS Beginner - class selectors

Hi Im starting with Css, so i still very fresh with a tons of info in my head at the moment. however im on the first project with no actual hint, just trying it on my own.
but I got stuck on this, I have no difficult with the HTML, all aligned and designed the classes for the .CSS
the problem is when Im applying the properties on CSS file, i can property just my class "header", so all the other I cant apply anything.
so where I`m missing? see below the code.
the exercise is this one:
Developing with CSS | Codecademy

=======

=.CSS FILE==
.header {

font-family: Helvetica;

font-size: 35px;

font-weight: bold;

color: khaki;

text-align: center;

background-image: url(‘’);

}

.brushes {

background-color: aqua;

}

.Frames {

}

.paint {

}

h2 {

font-family: Arial, Helvetica, sans-serif;

font-weight: bold;

}

p {

}

==============

<!DOCTYPE html> <html> <head> <link href="./resources/css/index.css" type="text/css" rel="stylesheet"> <title>Dasmoto`s Arts & Crafts</title> </head> <body> <div class="header"> <h1>Dasmoto`s Arts & Crafts</h1> </div> <div> <h2 class="Brushes">Brushes</h2> <img src="./resources/hacksaw.jpeg"> <p>Hacksaw Brushes</p> <p> Made of the highest quality oak, Hacksaw brushes are known for their weight and ability to hold paint in large amounts. Available in different sizes. Starting at $3.00 / brush </p> </div> <div> <h2 class="Frames">Frames</h2> <img src="./resources/frames.jpeg"> <p>Art Frames (assorted)</p> <p>Assorted frames made of different material, including MDF, birchwood, and PDE. Select frames can be sanded and painted according to your needs. Starting at $2.00 / frame. </p> </div> <div> <h2 class="Paint">Paint</h2> <img src="./Resources/finnish.jpeg"> <p>Clean Finish Paint</p> <p>Imported paint from Finland. Over 256 colors available in-store, varying in quantity (1 oz. to 8 oz.). Clean Finnish paint microbinds to canvas, increasing the finish and longevity of any artwork. Starting at $5.00 / tube.</p> </div> </body> </html>

Hey @script4994590756

I copy pasted your code and it looks like .brushes {background-color: aqua;} is the only part where your CSS is not applied and it’s because you didn’t write it with a uppercase “B” like you did on your HTML

<h2 class="Brushes">Brushes</h2>
1 Like

That`s it!! I did not realize css was CAPS sensitive!
thanks a lot