Apple

Apple's design system feels like precision engineering in a luminous white gallery. The interplay of crisp neutrals establishes a bright, expansive canvas, punctuated by a vibrant, yet restrained, blue as the sole chromatic accent. Sharp typography with subtle letter spacing and generous negative space conveys a sense of curated order, while highly rounded button capsules provide a soft, approachable contrast to the otherwise rigorous structure. Use Electric Blue (#0071e3) exclusively for primary call-to-action buttons to maintain visual focus. Apply 980px border-radius to all interactive buttons for a consistent rounded aesthetic. Prioritize SF Pro Display for large, impactful headlines, using its specific letter spacing values like -0.56px at 56px. Maintain a clear visual hierarchy with Graphite (#1d1d1f) for main text and Cool Gray (#707070) for secondary information. Use Canvas White (#ffffff) as the dominant background color to ensure a bright and expansive feel. Separate content sections with subtle background shifts to Porcelain (#f5f5f7), rather than heavy dividers or shadows. Ensure a horizontal padding of 21px for all primary action buttons for comfortable sizing. Do not use saturated blues for non-interactive elements; reserve them for direct user engagement. Avoid using custom shadows or borders on standard content cards, as they are meant to be seamless. Do not vary letter spacing for body text; maintain the specified SF Pro Text tracking values for legibility. Refrain from using color to indicate states like success or error; rely on iconography or structured messaging instead. Do not introduce additional font families; adhere strictly to SF Pro Text and SF Pro Display. Avoid small, precise radii (e.g., 4px) for interactive elements; stick to the highly rounded 980px for buttons or 11px for contained inputs. Never use excessive decorative elements or heavy gradients that would detract from the clean, systematic aesthetic.