:root{--font-body:var(--font-dm-sans), "DM Sans", sans-serif;--font-display:var(--font-montserrat), "Montserrat", sans-serif;--breakpoint-sm:640px;--breakpoint-md:768px;--breakpoint-lg:1024px;--breakpoint-xl:1280px;--breakpoint-2xl:1440px;--font-size-2xs:.6rem;--font-size-xs:.75rem;--font-size-sm:.875rem;--font-size-md:1rem;--font-size-lg:1.25rem;--font-size-xl:1.5rem;--font-size-2xl:2rem;--text-micro:var(--font-size-2xs);--text-caption:var(--font-size-xs);--text-label:var(--font-size-sm);--text-body:var(--font-size-md);--text-section-title:var(--font-size-lg);--text-panel-title:var(--font-size-xl);--text-page-title:var(--font-size-2xl);--font-size-100:var(--font-size-sm);--font-size-200:var(--font-size-md);--font-size-300:var(--font-size-md);--font-size-400:clamp(1.5rem, 2vw, 1.875rem);--font-size-500:clamp(2rem, 4vw, 2.75rem);--font-size-600:clamp(2.05rem, 3.6vw, 3.45rem);--font-size-700:clamp(2.45rem, 4.3vw, 4.3rem);--font-size-800:clamp(2.9rem, 5vw, 5rem);--space-050:.25rem;--space-100:.5rem;--space-150:.75rem;--space-200:1rem;--space-300:1.5rem;--space-400:2rem;--space-500:2.5rem;--space-600:3rem;--space-700:4rem;--space-800:5rem;--radius-sm:10px;--radius-md:20px;--radius-lg:30px;--radius-pill:999px;--radius-circle:50%;--radius-card:var(--radius-sm);--radius-panel:var(--radius-md);--app-shell-inline-padding:1rem;--app-container-reading:45rem;--app-container-content:75rem;--app-container-wide:80rem;--app-nav-row-height:60px;--app-shell-sticky-offset:0px;--page-background:var(--surface-base);--palette-rose-50:#fff4f6;--palette-rose-100:#f8ecef;--palette-rose-200:#fcc1c6;--palette-rose-300:#faa0a8;--palette-rose-500:#bc4361;--palette-rose-700:#71283a;--palette-rose-800:#4b1b27;--palette-rose-900:#341f29;--course-accent-color:var(--palette-rose-500);--palette-navy-50:#f4f6fb;--palette-navy-100:#e8edf5;--palette-navy-300:#676874;--palette-navy-500:#414251;--palette-navy-700:#272831;--palette-navy-800:#1c2026;--palette-navy-900:#15181d;--palette-ink-900:#121326;--palette-ink-900-rgb:18, 19, 38;--palette-teal-200:#c2e6dd;--palette-teal-500:#66c0ab;--palette-mint-100:#d8f1db;--palette-mint-200:#c7ebcc;--palette-mint-700:#647666;--palette-amber-50:#fff7ed;--palette-amber-100:#fdf0df;--palette-amber-300:#f3ad7b;--palette-amber-500:#ed6e1d;--palette-amber-700:#9b4d22;--palette-gold-50:#fff9e6;--palette-gold-100:#fbe6a1;--palette-gold-300:gold;--palette-gold-500:#d89d2a;--palette-gold-700:#8a6414;--palette-neutral-0:#fff;--palette-neutral-25:#fffef9;--palette-neutral-50:#f9f9f9;--palette-neutral-100:#f0f0f0;--palette-neutral-200:#e0e0e0;--palette-neutral-300:#d1d5db;--palette-neutral-500:#6b7280;--palette-neutral-700:#4a5568;--palette-neutral-900:#1f2937;--palette-status-success-100:#dff5e7;--palette-status-success-500:#28a745;--palette-status-success-700:#185c38;--palette-status-info-100:var(--palette-rose-100);--palette-status-info-500:var(--palette-rose-300);--palette-status-info-700:var(--palette-rose-500);--palette-status-warning-100:#fff4e5;--palette-status-warning-500:#ed6e1d;--palette-status-warning-700:#9b4d22;--palette-status-danger-100:#fceaea;--palette-status-danger-500:#b42b2b;--palette-status-danger-700:#8f1f1f;--palette-overlay-soft:rgba(var(--palette-ink-900-rgb), .04);--palette-overlay-default:rgba(var(--palette-ink-900-rgb), .08);--palette-overlay-strong:rgba(var(--palette-ink-900-rgb), .18);--palette-overlay-scrim:rgba(var(--palette-ink-900-rgb), .46);--palette-overlay-glass:#ffffffb8;--surface-base:var(--palette-neutral-0);--surface-base-rgb:255, 255, 255;--surface-canvas:var(--palette-neutral-25);--surface-subtle:var(--palette-neutral-50);--surface-muted:var(--palette-neutral-100);--surface-disabled:var(--palette-neutral-300);--surface-raised:rgba(var(--surface-base-rgb), .72);--surface-elevated:rgba(var(--surface-base-rgb), .84);--surface-overlay:var(--palette-overlay-glass);--surface-navbar:var(--palette-navy-500);--surface-inverse:var(--palette-navy-800);--surface-inverse-raised:color-mix(in srgb, var(--surface-inverse) 88%, var(--surface-base) 12%);--surface-inverse-glass-soft:color-mix(in srgb, var(--text-inverse) 6%, transparent);--surface-inverse-glass:color-mix(in srgb, var(--text-inverse) 10%, transparent);--surface-inverse-glass-strong:color-mix(in srgb, var(--text-inverse) 14%, transparent);--surface-accent:var(--palette-rose-300);--surface-alternate:var(--palette-rose-300);--surface-support:var(--palette-mint-200);--surface-warning:var(--palette-amber-50);--surface-success:var(--palette-status-success-100);--surface-info:var(--palette-status-info-100);--surface-danger:var(--palette-status-danger-100);--surface-highlight:var(--palette-rose-100);--text-primary:var(--palette-ink-900);--text-secondary:var(--palette-navy-500);--text-muted:#666;--text-subtle:rgba(var(--palette-ink-900-rgb), .72);--text-faint:rgba(var(--palette-ink-900-rgb), .52);--text-inverse:var(--palette-neutral-0);--text-subtle-inverse:color-mix(in srgb, var(--text-inverse) 72%, transparent);--text-faint-inverse:color-mix(in srgb, var(--text-inverse) 52%, transparent);--text-accent:var(--palette-rose-500);--text-support:color-mix(in srgb, var(--text-primary) 72%, var(--border-support) 28%);--text-success:var(--palette-status-success-500);--text-info:var(--palette-status-info-700);--text-warning:#ffc107;--border-default:var(--palette-neutral-200);--border-soft:rgba(var(--palette-ink-900-rgb), .08);--border-strong:rgba(var(--palette-ink-900-rgb), .14);--border-inverse:#ccc;--border-inverse-soft:color-mix(in srgb, var(--text-inverse) 8%, transparent);--border-inverse-strong:color-mix(in srgb, var(--text-inverse) 14%, transparent);--border-accent:var(--palette-rose-300);--border-support:var(--palette-rose-500);--color-action-primary-bg:var(--color-action-primary-product-bg);--color-action-primary-text:var(--palette-neutral-0);--color-action-primary-hover:var(--color-action-primary-product-hover);--color-action-secondary-bg:rgba(var(--surface-base-rgb), .72);--color-action-secondary-text:var(--text-primary);--color-action-secondary-hover:var(--surface-subtle);--color-action-inverse-text:var(--text-inverse);--color-action-inverse-border:color-mix(in srgb, var(--text-inverse) 32%, transparent);--color-action-inverse-hover:color-mix(in srgb, var(--text-inverse) 12%, transparent);--color-action-inverse-focus-ring:color-mix(in srgb, var(--text-inverse) 24%, transparent);--color-action-accent-bg:var(--palette-rose-500);--color-action-accent-text:var(--palette-neutral-0);--color-action-accent-hover:color-mix(in srgb, var(--palette-rose-500) 88%, var(--palette-ink-900) 12%);--color-action-support-bg:var(--palette-rose-500);--color-action-support-text:var(--text-primary);--color-action-support-hover:var(--palette-rose-500);--color-action-primary-heritage-bg:var(--palette-ink-900);--color-action-primary-heritage-hover:color-mix(in srgb, var(--palette-ink-900) 88%, var(--palette-neutral-0) 12%);--color-action-primary-product-bg:var(--palette-navy-500);--color-action-primary-product-hover:var(--palette-ink-900);--color-action-warning-bg:var(--palette-amber-500);--color-action-warning-text:var(--palette-neutral-0);--color-action-danger-bg:var(--palette-status-danger-500);--color-action-danger-text:var(--palette-neutral-0);--color-action-danger-hover:var(--palette-status-danger-700);--color-action-focus-ring:rgba(var(--palette-ink-900-rgb), .16);--color-status-success:var(--palette-status-success-500);--color-status-success-bg:var(--palette-status-success-100);--color-status-success-text:var(--palette-status-success-700);--color-status-info:var(--palette-status-info-500);--color-status-info-bg:var(--palette-status-info-100);--color-status-info-text:var(--palette-status-info-700);--color-status-warning:var(--palette-status-warning-500);--color-status-warning-bg:var(--palette-status-warning-100);--color-status-warning-text:var(--palette-status-warning-700);--color-status-danger:var(--palette-status-danger-500);--color-status-danger-bg:var(--palette-status-danger-100);--color-status-danger-text:var(--palette-status-danger-700);--overlay-soft:var(--palette-overlay-soft);--overlay-default:var(--palette-overlay-default);--overlay-strong:var(--palette-overlay-strong);--overlay-scrim:var(--palette-overlay-scrim);--overlay-glass:var(--palette-overlay-glass);--background:var(--surface-base);--background-mf:var(--surface-canvas);--background-mf-gradient:url(/Light_background.jpg) center/cover no-repeat fixed;--foreground:var(--text-primary);--background-secondary:var(--surface-subtle);--background-accent:var(--palette-rose-300);--border-primary:var(--border-default);--border-success:#4caf50;--border-danger:#f44336;--border-info:#bc4361;--border-warning:#ff9800;--text-success-strong:#2e7d32;--text-danger-strong:#c62828;--text-info-strong:#1565c0;--text-warning-strong:#e65100;--text-danger:#f44336;--interactive-strong-bg:var(--palette-navy-500);--interactive-strong-hover:#272831;--interactive-strong-text:#fff;--color-accent-hover:color-mix(in srgb, var(--palette-rose-300) 88%, var(--palette-ink-900) 12%);--shadow-primary:0 2px 8px #0000001a;--icon-hover-filter:brightness(0) saturate(100%) invert(37%) sepia(95%) saturate(1239%) hue-rotate(316deg) brightness(84%) contrast(97%);--background-accent-2:var(--palette-rose-500);--color-rating:gold;--background-accent-3:var(--palette-mint-200);--background-placeholder:#f0f0f0;--gradient-learner-plan:linear-gradient(90deg, var(--palette-mint-200) 0%, color-mix(in srgb, var(--palette-mint-200) 40%, var(--palette-neutral-0) 60%) 100%);--pricing-learner-card-text:var(--palette-neutral-700);--pricing-learner-badge-bg:color-mix(in srgb, var(--palette-neutral-0) 40%, transparent);--pricing-learner-icon-filter-dark:none;--gradient-hero-heritage:linear-gradient(135deg, var(--palette-rose-300) 0%, var(--palette-rose-500) 100%);--gradient-hero-product:linear-gradient(135deg, var(--palette-navy-500) 0%, var(--palette-mint-200) 100%);--gradient-surface-serious:linear-gradient(135deg, var(--palette-rose-500) 0%, var(--palette-navy-700) 100%);--color-accent-hover-2:#1c8db1;--surface-card:var(--surface-elevated);--shadow-color:#121326;--color-accent:var(--color-action-accent-bg);--color-accent-rgb:188, 67, 97;--interactive-danger-bg:var(--color-action-danger-bg);--background-panel-1:#f8ecef;--create-course-shell-background:linear-gradient(135deg, var(--palette-rose-100) 0%, color-mix(in srgb, var(--palette-rose-300) 50%, white 50%) 58%, color-mix(in srgb, var(--palette-rose-500) 40%, white 60%) 100%);--background-panel-2-gradient:linear-gradient(90deg, #f2d9df 0%, #dea1b0 100%);--background-preview-paper:#fffef9;--tab-bg:#edf2f7;--tab-bg-active:#fff;--tab-text:#4a5568;--tab-text-active:var(--text-primary);--tab-bg-disabled:#d1d5db;--tab-text-disabled:#6b7280;--tag-bg:#f0f4f8;--tag-text:#4a5568;--tag-icon:#a0aec0;--login-wall-bg:#fffffff2;--login-wall-text:#4a3035;--login-wall-highlight-start:#bc4361;--login-wall-highlight-end:#8c3248;--copilot-form-surface:var(--surface-elevated);--copilot-form-surface-strong:color-mix(in srgb, var(--surface-base) 94%, var(--surface-card) 6%);--copilot-form-border-strong:color-mix(in srgb, var(--border-strong) 82%, var(--surface-base) 18%);--copilot-control-border:color-mix(in srgb, var(--border-default) 74%, var(--surface-base) 26%);--copilot-control-surface:linear-gradient(180deg, var(--surface-base), color-mix(in srgb, var(--surface-base) 94%, var(--surface-subtle) 6%)), var(--surface-base);--shadow-strong:0 8px 30px #0003;--scrollbar-thumb:#0003;--scrollbar-thumb-hover:#0006;--chatbot-bg:#fffef9;--chatbot-input-bg:#ffffffe6;--chatbot-user-bubble-bg:#d07b90;--chatbot-user-bubble-text:#fff;--chatbot-assistant-bubble-bg:var(--palette-mint-100);--chatbot-assistant-bubble-text:#121326;--interactive-accent-bg:#fbe6a1;--interactive-accent-text:#121326;--interactive-accent-bg-hover:#ffe761;--dot-inactive:#12132640;--early-access-banner-gradient:linear-gradient(90deg, #bc436197 0%, #ebc7d0 100%);--flipbook-page-bg:#fffef9;--flipbook-inset-shadow-right:inset 15px 0 25px -12px #00000059;--flipbook-inset-shadow-left:inset -15px 0 25px -12px #00000059;--flipbook-spine-gradient-right:linear-gradient(to left, #0000000d 0%, #0000004d 100%);--flipbook-spine-gradient-left:linear-gradient(to right, #0000000d 0%, #0000004d 100%);--flipbook-header-text-shadow:2px 2px 4px #ffffffb3;--link-text:#0a2e1e;--interactive-focus-border:#0a2e1e;--google-button-bg:#fff;--google-button-text:#4a4a4a;--google-button-border:#e0e0e0;--coursetools-mentor-active-bg:#33366b;--coursetools-mentor-active-text:#fff;--coursetools-mentor-active-bg-hover:#2a2d5a;--mentoraudio-input-bg:#ffffffe6;--mentoraudio-input-bg-recording:#f3f4f6;--mentoraudio-input-border:#0000001a;--mentoraudio-input-text:#000;--mentoraudio-input-placeholder:#00000080;--mentoraudio-input-focus-bg:#f3f4f6;--mentoraudio-input-focus-border:#0003;--mentoraudio-input-glass-bg:linear-gradient(135deg, #ffffffb3, #e8f1ff59), #ffffff40;--mentoraudio-input-glass-focus-bg:linear-gradient(135deg, #fff9, #e0ecff4d), #ffffff4d;--mentoraudio-input-glass-shadow:inset 0 1px 0 #ffffffb3, 0 10px 24px #0f172a24;--mentoraudio-input-glass-focus-shadow:inset 0 1px 0 #ffffffbf, 0 0 0 1px #3b82f633, 0 12px 26px #0f172a2e;--mentoraudio-input-disabled-text:#3741518c;--mentoraudio-shadow:0 8px 32px #0003;--mentoraudio-hover-shadow:0 10px 35px #0000001f;--mentoraudio-focus-shadow:0 8px 40px #00000026;--mentoraudio-button-bg:#0000000d;--mentoraudio-button-border:#0003;--mentoraudio-button-icon:#374151;--mentoraudio-button-glass-bg:linear-gradient(160deg, #fffc, #ffffff73), #ffffff47;--mentoraudio-button-glass-hover-bg:linear-gradient(160deg, #ffffffe6, #fff9), #ffffff5c;--mentoraudio-button-glass-shadow:inset 0 1px 0 #ffffffc7, 0 10px 24px #0f172a26;--mentoraudio-button-glass-hover-shadow:inset 0 1px 0 #ffffffd9, 0 12px 26px #0f172a2e;--mentoraudio-button-glass-border:#1e293b2e;--mentoraudio-button-glass-hover-border:#3b82f659;--mentoraudio-mic-inner-shadow:inset 0 1px 0 #ffffffa6;--mentoraudio-send-hover-bg:#22c55e4d;--mentoraudio-mic-hover-bg:#0000001a;--mentoraudio-mic-recording-bg:#ef444433;--mentoraudio-mic-recording-border:#ef444466;--mentoraudio-mic-recording-icon:#ef4444;--mentoraudio-mic-recording-shadow:#ef444466;--mentoraudio-mic-recording-pulse-fade:#ef444400;--mentoraudio-input-recording-shadow:#ef444438;--mentoraudio-visualizer-speaking:linear-gradient(to top, #10b981, #34d399, #6ee7b7);--mentoraudio-visualizer-recording:linear-gradient(to top, #ef4444, #f87171, #fca5a5);--mentoraudio-visualizer-speaking-shadow:#10b9814d;--mentoraudio-visualizer-recording-shadow:#ef44444d;--mentoraudio-error-text:#ef4444;--mentoraudio-error-bg:#ef44441a;--mentoraudio-error-border:#ef444433;--mentoraudio-retry-bg:#ef444433;--mentoraudio-retry-border:#ef444466;--mentoraudio-retry-text:#fff;--mentoraudio-retry-hover-bg:#ef44444d;--mentoraudio-response-bg:#ffffffb3;--mentoraudio-response-shadow:0 10px 35px #00000014;--mentoraudio-response-glass-bg:linear-gradient(135deg, #ffffffbd, #eef5ff80), #ffffff47;--mentoraudio-response-glass-border:#0f172a1f;--mentoraudio-response-glass-shadow:0 8px 28px #0f172a24, inset 0 1px 0 #ffffffa3;--mentoraudio-retract-bg:#fffc;--mentoraudio-retract-border:#0000001a;--mentoraudio-retract-icon:#374151;--mentoraudio-retract-hover-bg:#fff;--mentoraudio-retract-hover-icon:#111827;--mentoraudio-info-text:#575757;--mentoraudio-header-bg:#3b82f61a;--mentoraudio-header-border:#0000001a;--mentoraudio-header-text:#374151;--mentoraudio-header-divider:#0f172a14;--mentoraudio-typing-indicator:var(--palette-teal-500);--mentoraudio-response-text:#374151;--mentoraudio-response-strong:#1f2937;--mentoraudio-response-code-bg:#0000000d;--mentoraudio-mode-toggle-active-bg:#3b82f633;--mentoraudio-mode-toggle-active-border:#3b82f666;--mentoraudio-mode-toggle-active-icon:var(--palette-teal-500);--mentoraudio-mode-toggle-hover-bg:#3b82f633;--mentoraudio-mode-toggle-hover-border:#3b82f666;--mentoraudio-mode-toggle-hover-icon:var(--palette-teal-500);--mentoraudio-speaking-indicator-core:radial-gradient(circle at 50% 50%, #8ec5fc, #e0c3fc);--mentoraudio-speaking-indicator-glow:radial-gradient(circle at 40% 40%, #ffffffe6, #e0cbffb3 30%, #8ec5fc80 70%, transparent);--mentoraudio-speaking-indicator-glow-shadow-1:#8ec5fc80;--mentoraudio-speaking-indicator-glow-shadow-2:#e0cbff4d;--mentoraudio-speaking-indicator-glow-shimmer-shadow-1:#8ec5fcb3;--mentoraudio-speaking-indicator-glow-shimmer-shadow-2:#e0cbff80;--mentoraudio-status-bg:#ffffffb3;--mentoraudio-status-border:#0000000d;--mentoraudio-status-text:#374151;--mentoraudio-mode-live-border:#10b9817a;--mentoraudio-mode-live-shadow:inset 0 1px 0 #ffffffd1, 0 12px 26px #0f172a2e, 0 0 0 1px #10b9813d;--mentoraudio-mode-dot-bg:#ffffffe0;--mentoraudio-mode-dot-border:#0f172a40;--mentoraudio-mode-dot-shadow:0 0 8px #ffffff85;--mentoraudio-mode-dot-live-bg:#10b981fa;--mentoraudio-mode-dot-live-shadow:0 0 10px #10b981b3;--mentoraudio-status-shadow:0 4px 12px #0f172a1f;--mentoraudio-scrollbar-thumb:#0f172a38;--mentoraudio-bubble-shadow:0 8px 20px #0f172a29;--mentoraudio-bubble-border:#ffffff8c;--mentoraudio-bubble-code-bg:#0f172a14;--course-bg:#fff;--course-text:#333;--course-text-magazine:var(--course-text);--course-heading-text:#121326;--course-toc-bg:#fff;--course-toc-border:#e0e0e0;--course-toc-text:#1f2937;--course-toc-text-strong:#0f172a;--course-toc-text-muted:#334155;--course-toc-text-subtle:#475569;--course-math-bg:#f8f9fa;--course-toc-link:#666;--course-toc-link-active:#121326;--course-select-option-bg:#fff;--course-select-option-text:#0f172a;--course-quote-bg:#f9f9f9;--course-quote-text:#555;--course-table-bg:#fff;--course-table-even-row-bg:#c6c7c8;--course-table-row-hover-bg:#e3f2fd;--rating-box-bg:#12132680;--rating-box-shadow:0 0 10px #ffffff1a;--rating-box-bg-hover:#121326e6;--rating-box-shadow-hover:0 0 15px #ffffff4d;--rating-text-color:#666;--rating-text-color-hover:var(--text-primary);--rating-highlight:gold;--rating-highlight-hover:orange;--rating-percentage-text-shadow:0 0 5px 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