Full quiz flow s01-s20: splash, intro, value prop, social proof, name/skin-type/age/concerns/goal quiz with insights, analysing loader, result with skin score, AM/PM routines, ingredient science, signup, welcome. Duolingo-style design: flat cards, pressable SButton (Stack trick), 4px progress bar, mascot moods (wave/think/analyze/celebrate), confetti on result+welcome, personalized content throughout.