Double Border Button

'use client';

import type { ElementType, HTMLAttributes, ReactNode } from 'react';
import './DoubleBorderButton.css';

/**
 * DoubleBorderButton — A button with a sophisticated offset double-border effect and sleek hover transitions.
 */
export interface DoubleBorderButtonProps extends HTMLAttributes<HTMLElement> {
  href?: string;
  target?: string;
  rel?: string;
  type?: 'button' | 'submit' | 'reset';
  variant?: 'primary' | 'secondary' | 'ghost';
  size?: 'sm' | 'md' | 'lg';
  disabled?: boolean;
  children?: ReactNode;
}

export function DoubleBorderButton({
  href,
  type = 'button',
  variant = 'primary',
  size = 'md',
  disabled = false,
  className,
  children,
  ...rest
}: DoubleBorderButtonProps) {
  const Tag: ElementType = href ? 'a' : 'button';
  return (
    <Tag
      {...rest}
      href={href}
      type={href ? undefined : type}
      disabled={href ? undefined : disabled}
      aria-disabled={href && disabled ? true : undefined}
      className={['double-border-btn', `double-border-btn--${variant}`, `double-border-btn--${size}`, className].filter(Boolean).join(' ')}
    >
      <span className="double-border-btn__content">{children}</span>
    </Tag>
  );
}

export default DoubleBorderButton;

/* DoubleBorderButton — ported from astro-component-kit (buttons/DoubleBorderButton.astro) */

.double-border-btn {
  --offset: 5px;
  --border-color: rgba(255, 255, 255, 0.4);
  --hover-color: #fff;
  
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: transparent;
  color: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--r-sm, 4px);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1;
  user-select: none;
  white-space: nowrap;
  font-family: var(--font-sans, inherit);
  font-weight: 500;
}

.double-border-btn__content {
  display: block;
  padding: 0.6rem 1.6rem;
}

.double-border-btn::before {
  content: '';
  position: absolute;
  top: var(--offset);
  left: var(--offset);
  width: 100%;
  height: 100%;
  border: 1px solid var(--border-color);
  border-radius: inherit;
  z-index: -1;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0.5;
}

.double-border-btn:hover:not(:disabled) {
  color: var(--hover-color);
  border-color: var(--hover-color);
  transform: translate(calc(var(--offset) * -0.5), calc(var(--offset) * -0.5));
}

.double-border-btn:hover:not(:disabled)::before {
  top: calc(var(--offset) * 1.5);
  left: calc(var(--offset) * 1.5);
  border-color: var(--hover-color);
  opacity: 1;
}

.double-border-btn:active:not(:disabled) {
  transform: translate(0, 0);
}

.double-border-btn:active:not(:disabled)::before {
  top: 0;
  left: 0;
}

.double-border-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: grayscale(1);
}

/* Variants */
.double-border-btn--primary {
  --border-color: rgba(99, 102, 241, 0.5);
  --hover-color: #818cf8;
  color: #818cf8;
}

.double-border-btn--secondary {
  --border-color: rgba(255, 255, 255, 0.3);
  --hover-color: #fff;
  color: #fff;
}

.double-border-btn--ghost {
  --border-color: rgba(255, 255, 255, 0.1);
  --hover-color: rgba(255, 255, 255, 0.8);
  color: rgba(255, 255, 255, 0.6);
}

/* Sizes */
.double-border-btn--sm { --offset: 3px; }
.double-border-btn--sm .double-border-btn__content { padding: 0.45rem 1rem; font-size: 0.85rem; }

.double-border-btn--md { --offset: 5px; }
.double-border-btn--md .double-border-btn__content { padding: 0.65rem 1.6rem; font-size: 1rem; }

.double-border-btn--lg { --offset: 8px; }
.double-border-btn--lg .double-border-btn__content { padding: 0.85rem 2.2rem; font-size: 1.15rem; }