:root {
  --color-bg: #f4f7fb; --color-text: #101a2b; --color-muted: #526073; --color-accent: #2c5bff; --color-danger: #b42318; --color-success: #087443; --color-warning: #9a6700; --color-focus: #ff7a59;
  --surface-content: #fff; --surface-raised: #fff; --surface-functional: #cbece2; --surface-glass: rgba(244,247,251,.94); --surface-glass-solid: #f4f7fb;
  --font-ui: "Avenir Next", system-ui, sans-serif; --text-caption: .74rem; --text-body: 1rem; --text-title: 1.65rem; --text-display: clamp(2.7rem,6vw,5.5rem); --leading-body: 1.6; --tracking-display: -.065em;
  --space-1: .25rem; --space-2: .5rem; --space-3: .75rem; --space-4: 1rem; --space-6: 1.5rem; --space-8: 2rem;
  --radius-sm: .25rem; --radius-md: .5rem; --radius-lg: 1rem; --radius-pill: 999px;
  --shadow-1: 0 1px 2px rgba(16,26,43,.08); --shadow-2: 0 12px 30px rgba(16,26,43,.12); --shadow-overlay: 0 16px 40px rgba(16,26,43,.13);
  --glass-blur: 8px; --glass-saturate: 1; --glass-opacity: .94;
  --z-base: 0; --z-sticky: 10; --z-dropdown: 20; --z-overlay: 30; --z-modal: 40; --z-toast: 50;
  --motion-instant: 0ms; --motion-fast: 120ms; --motion-base: 200ms; --ease-standard: ease; --ease-exit: ease-in; --spring-response: .25; --spring-damping: .8;
  --content-max: 1280px; --reading-max: 46rem; --control-min: 44px; --target-min: 44px;
  --profile-depth: .4; --profile-colorfulness: .35; --profile-motion-scale: 1;
}
[data-profile="standard"] { --profile-depth: .4; --profile-colorfulness: .35; --profile-motion-scale: 1; }
[data-profile="expressive"] { --profile-depth: .55; --profile-colorfulness: .45; --profile-motion-scale: 1; }
@media (prefers-color-scheme: dark) { :root { --color-bg: #101a2b; --color-text: #f4f7fb; --surface-content: #17243a; --surface-raised: #17243a; } }
@media (prefers-reduced-motion: reduce) { :root { --motion-fast: 0ms; --motion-base: 0ms; } }
@media (forced-colors: active) { :root { --color-focus: Highlight; } }
@media (prefers-contrast: more) { :root { --color-muted: #34425a; --color-focus: #b42318; } }