Update hero section and color scheme across the application

- Changed the hero headline and sub-headline for better clarity and engagement.
- Added a secondary button for demo booking in the hero section.
- Updated primary color scheme in CSS files to unify the visual identity.
- Adjusted background and text colors to enhance readability and aesthetics.
- Removed unused CSS classes to streamline styles.
- Updated Tailwind configuration to reflect new color values for primary and secondary themes.

static/css/custom.css

@@ -237,12 +237,6 @@ section.li-block.section-5 .container .row ul li {
 section.li-block a.btn-chill {
   background-color: #fc3636; }
 
-.btn-primary {
-  background-color: #f46839;
-  color: white;
-  border: 1px solid #f46839;
-  border-radius: 2em; }
-
 .download {
   margin-right: auto;
   margin-left: auto;