Create thumbnail.vixl at 1280x720 for a YouTube video. Use a dark background, a large headline 'HOW I BUILT IT' (font size at least 80), a subtitle containing '48 hours', and a red badge (a shape with the word NEW on it) in the top-right quarter. Keep all content inside a 5% safe area and out of the bottom-right 15% x 15% corner where YouTube shows the timestamp. Text must be legible at 320 px wide and meet WCAG contrast. Export thumbnail.png at full size.