first commit

apps/frontend/components/ui/button.tsx

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+import * as React from 'react';
+import { Slot } from '@radix-ui/react-slot';
+import { cva, type VariantProps } from 'class-variance-authority';
+import { cn } from '@/lib/utils';
+
+const buttonVariants = cva(
+  'inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-2xl text-sm font-semibold transition disabled:pointer-events-none disabled:opacity-50',
+  {
+    variants: {
+      variant: {
+        default: 'bg-[#20212b] text-white hover:bg-[#11131d]',
+        secondary: 'bg-[#f4f5f8] text-[#111827] hover:bg-[#eceef4]',
+        outline: 'border border-[#d8dbe5] bg-transparent hover:bg-[#f4f5f8]',
+        ghost: 'hover:bg-[#f4f5f8]',
+        white: 'bg-white text-[#171821] hover:bg-[#f3f4f7]'
+      },
+      size: {
+        default: 'h-11 px-5',
+        sm: 'h-9 px-3',
+        lg: 'h-14 px-8',
+        icon: 'h-11 w-11'
+      }
+    },
+    defaultVariants: {
+      variant: 'default',
+      size: 'default'
+    }
+  }
+);
+
+export interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement>, VariantProps<typeof buttonVariants> {
+  asChild?: boolean;
+}
+
+export function Button({ className, variant, size, asChild = false, ...props }: ButtonProps) {
+  const Comp = asChild ? Slot : 'button';
+  return <Comp className={cn(buttonVariants({ variant, size, className }))} {...props} />;
+}