Frontend/src/components/Button.tsx

import React from 'react';

interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement> {
    variant?: 'primary' | 'secondary' | 'danger' | 'ghost';
    size?: 'sm' | 'md' | 'lg';
    isLoading?: boolean;
    icon?: React.ReactNode;
    children: React.ReactNode;
}

export const Button: React.FC<ButtonProps> = ({
    variant = 'primary',
    size = 'md',
    isLoading = false,
    icon,
    children,
    className = '',
    disabled,
    ...props
}) => {
    const variantClasses = {
        primary: 'btn-primary',
        secondary: 'btn-secondary',
        danger: 'btn-danger',
        ghost: 'px-4 py-2 text-slate-600 hover:text-slate-900 hover:bg-slate-100 rounded-xl transition-colors duration-200',
    };

    const sizeClasses = {
        sm: 'text-sm px-4 py-2',
        md: 'text-sm px-6 py-3',
        lg: 'text-base px-8 py-4',
    };

    return (
        <button
            className={`${variantClasses[variant]} ${sizeClasses[size]} inline-flex items-center gap-2 font-semibold transition-all duration-200 ${disabled || isLoading ? 'opacity-50 cursor-not-allowed pointer-events-none' : ''} ${className}`}
            disabled={disabled || isLoading}
            {...props}
        >
            {isLoading ? (
                <svg className="w-4 h-4 animate-spin" viewBox="0 0 24 24" fill="none">
                    <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
                    <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z" />
                </svg>
            ) : icon}
            {children}
        </button>
    );
};