title: how to change the font color, font size, and button color in React
body: <p>when I try to change the price color, botton color and title font style, but it doesn't work. It didn't change anything. and how to create shadow</p>
  
  <p>index.js
   <a href="https://i.stack.imgur.com/J3E8t.png" rel="nofollow noreferrer">index.js</a></p>
  
  <p>panel.js
  <a href="https://i.stack.imgur.com/jN7pe.png" rel="nofollow noreferrer">Line 11 and line 22, try to change the price color</a></p>
  
  <p>Botton.js
  <a href="https://i.stack.imgur.com/5Jq9i.png" rel="nofollow noreferrer">Line 20 and lines 5-7, try to change the button color</a></p>
  
  <p>Button.css
  <a href="https://i.stack.imgur.com/mYHPU.png" rel="nofollow noreferrer">button.css</a></p>