:root{--color-program-paper:#f1f3f6;--color-program-paper-2:#f6f7f9;--color-program-surface:#fff;--color-program-surface-soft:#f7f8fa;--color-program-ink:#171a1f;--color-program-muted:#707782;--color-program-muted-strong:#505762;--color-program-rule:#e4e7ec;--color-program-rule-strong:#d4d9e1;--color-program-accent:#2d88f1;--color-program-action:#2d88f1;--color-program-action-hover:#2174d8;--color-program-accent-ink:#fff;--color-program-success:#169b63;--color-program-success-soft:#ecf8f2;--color-program-warning:#c9871d;--color-program-warning-soft:#fff7e8;--color-program-danger:#d64545;--color-program-danger-soft:#fff0f0;--color-program-focus:#2d88f1;--font-display:"Inter",system-ui,sans-serif;--font-body:"Inter",system-ui,sans-serif;--font-mono:ui-monospace,SFMono-Regular,Menlo,monospace;--space-3xs:0.125rem;--space-2xs:0.25rem;--space-xs:0.5rem;--space-sm:0.75rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2rem;--space-2xl:3rem;--space-3xl:4.5rem;--text-xs:0.75rem;--text-sm:0.875rem;--text-base:1rem;--text-md:1.125rem;--text-lg:1.375rem;--text-xl:1.625rem;--text-2xl:clamp(2rem,4vw,3.5rem);--ease-out:cubic-bezier(0.16,1,0.3,1);--ease-in:cubic-bezier(0.7,0,0.84,0);--ease-in-out:cubic-bezier(0.65,0,0.35,1);--dur-micro:120ms;--dur-short:220ms;--dur-long:420ms;--radius-sm:0.625rem;--radius-md:0.875rem;--radius-card:1.25rem;--radius-pill:999px;--rule-thin:1px;--shadow-card:0 10px 28px rgba(23,26,31,.045);--shadow-card-hover:0 14px 30px rgba(23,26,31,.065);--shadow-accent:0 10px 24px rgba(45,136,241,.2);--control-height-sm:2.25rem;--control-height-md:2.75rem;--control-height-lg:3.25rem;--content-width-sm:48rem;--content-width-md:64rem;--content-width-lg:80rem;--page-gutter:clamp(1rem,3vw,2rem);--page-section-gap:clamp(1.5rem,3vw,2rem);--z-modal:400}.learning-header{border-color:var(--color-program-rule)!important;background:color-mix(in oklch,var(--color-program-surface) 96%,transparent)!important;box-shadow:0 1px 0 var(--color-program-rule)!important}.learning-header .text-brand-text,.learning-header .text-brand-text-secondary{color:var(--color-program-ink)!important}.learning-header .text-brand-text-secondary{color:var(--color-program-muted)!important}.learning-header .bg-brand-secondary\/50{background:var(--color-program-surface-soft)!important}.learning-bottom-nav a:focus-visible,.learning-bottom-nav button:focus-visible,.learning-header a:focus-visible,.learning-header button:focus-visible{outline:2px solid var(--color-program-focus);outline-offset:3px}.learning-bottom-nav__surface{border-color:var(--color-program-rule)!important;background:var(--color-program-surface)!important;box-shadow:0 -10px 30px color-mix(in oklch,var(--color-program-ink) 8%,transparent)!important}.learning-bottom-nav__spacer{background:var(--color-program-paper)}.learning-bottom-nav .text-brand-text-secondary{color:var(--color-program-muted)!important}.learning-bottom-nav .bg-brand-card{background:var(--color-program-surface)!important}