function WhatsAppButton() {
  const [hover, setHover] = React.useState(false);

  return (
    <a
      href="https://wa.me/19733936805"
      target="_blank"
      rel="noopener noreferrer"
      aria-label="Chat on WhatsApp"
      onMouseEnter={() => setHover(true)}
      onMouseLeave={() => setHover(false)}
      style={{
        position: 'fixed',
        bottom: 28,
        right: 28,
        zIndex: 100,
        display: 'inline-flex',
        alignItems: 'center',
        justifyContent: 'center',
        gap: hover ? 10 : 0,
        background: '#25D366',
        color: '#fff',
        borderRadius: 999,
        height: 52,
        padding: hover ? '0 20px 0 14px' : 0,
        width: hover ? 'auto' : 52,
        boxShadow: '0 4px 16px rgba(37,211,102,0.4)',
        textDecoration: 'none',
        fontFamily: 'var(--font-sans)',
        fontSize: 14,
        fontWeight: 600,
        overflow: 'hidden',
        transition: 'width 250ms var(--ease), padding 250ms var(--ease), gap 250ms var(--ease)',
        whiteSpace: 'nowrap',
      }}
    >
      <svg width="24" height="24" viewBox="0 0 24 24" fill="currentColor" style={{ flexShrink: 0 }}>
        <path d="M17.472 14.382c-.297-.149-1.758-.867-2.03-.967-.273-.099-.471-.148-.67.15-.197.297-.767.966-.94 1.164-.173.199-.347.223-.644.075-.297-.15-1.255-.463-2.39-1.475-.883-.788-1.48-1.761-1.653-2.059-.173-.297-.018-.458.13-.606.134-.133.298-.347.446-.52.149-.174.198-.298.298-.497.099-.198.05-.371-.025-.52-.075-.149-.669-1.612-.916-2.207-.242-.579-.487-.5-.669-.51-.173-.008-.371-.01-.57-.01-.198 0-.52.074-.792.372-.272.297-1.04 1.016-1.04 2.479 0 1.462 1.065 2.875 1.213 3.074.149.198 2.096 3.2 5.077 4.487.709.306 1.262.489 1.694.625.712.227 1.36.195 1.871.118.571-.085 1.758-.719 2.006-1.413.248-.694.248-1.289.173-1.413-.074-.124-.272-.198-.57-.347m-5.421 7.403h-.004a9.87 9.87 0 01-5.031-1.378l-.361-.214-3.741.982.998-3.648-.235-.374a9.86 9.86 0 01-1.51-5.26c.001-5.45 4.436-9.884 9.888-9.884 2.64 0 5.122 1.03 6.988 2.898a9.825 9.825 0 012.893 6.994c-.003 5.45-4.437 9.884-9.885 9.884m8.413-18.297A11.815 11.815 0 0012.05 0C5.495 0 .16 5.335.157 11.892c0 2.096.547 4.142 1.588 5.945L.057 24l6.305-1.654a11.882 11.882 0 005.683 1.448h.005c6.554 0 11.89-5.335 11.893-11.893a11.821 11.821 0 00-3.48-8.413z"/>
      </svg>
      <span style={{
        maxWidth: hover ? 180 : 0,
        overflow: 'hidden',
        transition: 'max-width 250ms var(--ease), opacity 150ms var(--ease)',
        opacity: hover ? 1 : 0,
      }}>Chat on WhatsApp</span>
    </a>
  );
}

window.WhatsAppButton = WhatsAppButton;