web/src/shared/ui/button.tsx

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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

import { Button as ButtonPrimitive } from "@base-ui/react/button";
import { type VariantProps, cva } from "class-variance-authority";

import { cn } from "@/lib/utils";

// Spec §7.5 button system:
// - default → near-black primary (matches Figma "Add user")
// - outline → white card with border
// - ghost   → text-only, hover tinted
// - destructive → soft red tint (not a fill)
// - brand   → blue CTA for wizard "Continue" / proposal "Submit"
// - link    → inline text link
const buttonVariants = cva(
  "group/button inline-flex shrink-0 items-center justify-center rounded-md border border-transparent bg-clip-padding text-sm font-semibold whitespace-nowrap transition-all outline-none select-none focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 active:not-aria-[haspopup]:translate-y-px disabled:pointer-events-none disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
  {
    variants: {
      variant: {
        default: "bg-primary text-primary-foreground hover:bg-primary/90",
        outline:
          "border-border bg-background text-foreground hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:border-input dark:bg-input/30 dark:hover:bg-input/50",
        secondary:
          "bg-secondary text-secondary-foreground hover:bg-secondary/80 aria-expanded:bg-secondary aria-expanded:text-secondary-foreground",
        ghost:
          "text-foreground hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:hover:bg-muted/50",
        destructive:
          "bg-[color:var(--custos-red-50)] text-[color:var(--custos-red-700)] hover:bg-[color:var(--custos-red-100)] focus-visible:border-destructive/40 focus-visible:ring-destructive/20",
        brand: "bg-brand text-brand-foreground hover:bg-brand/90",
        link: "text-brand underline-offset-4 hover:underline",
      },
      size: {
        default:
          "h-9 gap-1.5 px-4 has-data-[icon=inline-end]:pr-3 has-data-[icon=inline-start]:pl-3",
        xs: "h-7 gap-1 rounded-[min(var(--radius-md),8px)] px-2 text-xs in-data-[slot=button-group]:rounded-md has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5 [&_svg:not([class*='size-'])]:size-3",
        sm: "h-8 gap-1 rounded-[min(var(--radius-md),8px)] px-3 text-[0.8rem] in-data-[slot=button-group]:rounded-md has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2 [&_svg:not([class*='size-'])]:size-3.5",
        lg: "h-10 gap-1.5 px-5 has-data-[icon=inline-end]:pr-4 has-data-[icon=inline-start]:pl-4",
        icon: "size-9",
        "icon-xs":
          "size-7 rounded-[min(var(--radius-md),8px)] in-data-[slot=button-group]:rounded-md [&_svg:not([class*='size-'])]:size-3",
        "icon-sm":
          "size-8 rounded-[min(var(--radius-md),8px)] in-data-[slot=button-group]:rounded-md",
        "icon-lg": "size-10",
      },
    },
    defaultVariants: {
      variant: "default",
      size: "default",
    },
  },
);

function Button({
  className,
  variant = "default",
  size = "default",
  ...props
}: ButtonPrimitive.Props & VariantProps<typeof buttonVariants>) {
  return (
    <ButtonPrimitive
      data-slot="button"
      className={cn(buttonVariants({ variant, size, className }))}
      {...props}
    />
  );
}

export { Button, buttonVariants };