Welcome Back!

**Fixed:** - Removed `FILTER_SANITIZE_EMAIL` that could corrupt valid emails - Removed `htmlspecialchars()` before database insertion (data integrity) - Added `htmlspecialchars()` to all HTML outputs for XSS prevention - Escaped CSRF token values in hidden inputs - Escaped `safe_to_extract` value in dashboard output - All prepared statements maintained for SQL injection prevention - `password_hash()`/`password_verify()` intact - PDO exception mode set - `IF NOT EXISTS` for tables - Google Fonts, CSS animations, responsive design, and interactive demo all present