Modern, minimalist, sleek, futuristic, touchscreen, calculator app, pastel colors, soft glow, rounded edges, flat design, iOS style, digital display, numeric keypad, function buttons, equals sign, multiplication symbol, division sign, addition symbol, subtraction symbol, percentage button, square root button, parentheses, mathematical operations, simple, intuitive, user-friendly interface, subtle animations, gentle transitions, glass-like reflections, futuristic ambient lighting, shallow depth of field.