feat: redesign landing page with brand system and section blocks

Refresh the homepage around new hero/services/roadmap sections, shared design tokens, and updated brand assets.

Co-authored-by: Cursor <cursoragent@cursor.com>

components/ui/empty.tsx

@@ -1,5 +1,6 @@
 import { cva, type VariantProps } from "class-variance-authority"
 
+import { type } from "@/lib/typography"
 import { cn } from "@/lib/utils"
 
 function Empty({ className, ...props }: React.ComponentProps<"div">) {
@@ -62,7 +63,7 @@ function EmptyTitle({ className, ...props }: React.ComponentProps<"div">) {
   return (
     <div
       data-slot="empty-title"
-      className={cn("text-lg font-medium tracking-tight", className)}
+      className={cn(type.h3, "text-center font-medium", className)}
       {...props}
     />
   )
@@ -73,7 +74,7 @@ function EmptyDescription({ className, ...props }: React.ComponentProps<"p">) {
     <div
       data-slot="empty-description"
       className={cn(
-        "text-muted-foreground [&>a]:text-accent text-sm/relaxed [&>a]:underline [&>a]:underline-offset-4 hover:[&>a]:no-underline",
+        "text-muted-foreground [&>a]:text-primary text-sm leading-relaxed [&>a]:underline [&>a]:underline-offset-4 hover:[&>a]:no-underline",
         className
       )}
       {...props}