:root{--brand-primary:#1a3a5c;--brand-primary-light:#eef4fa;--brand-primary-soft:#d6e5f5;--brand-primary-dark:#0f2744;--brand-primary-deep:#081829;--brand-surface:#ffffff;--brand-surface-alt:#f7f9fc;--brand-surface-raised:#ffffff;--brand-surface-deep:#060e1a;--brand-surface-muted:#eef2f7;--brand-text:#0b1a2e;--brand-text-strong:#050e1a;--brand-text-muted:#4a5b6e;--brand-text-soft:#6b7f94;--brand-text-subtle:#8fa0b3;--brand-text-inverse:#f8fafc;--brand-border:#e2e8f0;--brand-border-strong:#cbd5e1;--brand-border-subtle:#f1f5f9;--brand-accent:#c8922a;--brand-accent-light:#fef7ed;--brand-accent-soft:#f5dba8;--brand-accent-dark:#a6771e;--brand-success:#0d7c5f;--brand-success-soft:#ecfdf5;--brand-danger:#c0392b;--brand-danger-soft:#fef2f2;--brand-progress:#1a3a5c;--state-not-started:#e2e8f0;--state-in-progress:#1a3a5c;--state-completed:#0d7c5f;--state-locked:#94a3b8;--feedback-correct:#0d7c5f;--feedback-correct-soft:#ecfdf5;--feedback-wrong:#c0392b;--feedback-wrong-soft:#fef2f2;--feedback-neutral:#64748b;--support-cyan:#0ea5e9;--support-teal:#14b8a6;--support-violet:#7c3aed;--shadow-soft:0 1px 2px rgba(10,26,46,0.04);--shadow-card:0 1px 3px rgba(10,26,46,0.05),0 6px 16px rgba(10,26,46,0.04);--shadow-elevated:0 4px 12px rgba(10,26,46,0.07),0 16px 40px rgba(10,26,46,0.05);--shadow-nav:0 14px 34px rgba(10,26,46,0.10);--overlay-dim:rgba(5,14,26,0.50);--glass-surface:rgba(255,255,255,0.78);--glass-surface-strong:rgba(255,255,255,0.92);--glass-border:rgba(203,213,225,0.65);--glass-shadow:0 18px 44px rgba(10,26,46,0.10);--motion-fast:150ms;--motion-base:240ms;--motion-slow:360ms;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--radius-sm:0.375rem;--radius-md:0.5rem;--radius-lg:0.625rem;--radius-xl:0.75rem;--radius-2xl:0.875rem;--radius-3xl:1rem;--radius-full:9999px}.dark{--brand-primary:#2d6ba8;--brand-primary-light:rgba(45,107,168,0.12);--brand-primary-soft:rgba(45,107,168,0.16);--brand-primary-dark:#4a8bc2;--brand-primary-deep:#a0c4e8;--brand-surface:#0a1428;--brand-surface-alt:#070f1e;--brand-surface-raised:#0f1d36;--brand-surface-deep:#040810;--brand-surface-muted:#0f1d36;--brand-text:#e8edf5;--brand-text-strong:#ffffff;--brand-text-muted:#9aafc8;--brand-text-soft:#7a8fa8;--brand-text-subtle:#5a6f88;--brand-text-inverse:#0b1a2e;--brand-border:#1a2d4a;--brand-border-strong:#2a4060;--brand-border-subtle:#152540;--brand-accent:#e8b84b;--brand-accent-light:rgba(232,184,75,0.12);--brand-accent-soft:rgba(232,184,75,0.16);--brand-accent-dark:#f5cd6a;--brand-success:#34d399;--brand-success-soft:rgba(52,211,153,0.12);--brand-danger:#f87171;--brand-danger-soft:rgba(248,113,113,0.12);--brand-progress:#2d6ba8;--state-not-started:#2a4060;--state-in-progress:#2d6ba8;--state-completed:#34d399;--state-locked:#5a6f88;--feedback-correct:#34d399;--feedback-correct-soft:rgba(52,211,153,0.12);--feedback-wrong:#fb7185;--feedback-wrong-soft:rgba(251,113,133,0.12);--feedback-neutral:#7a8fa8;--support-cyan:#22d3ee;--support-teal:#5eead4;--support-violet:#a78bfa;--shadow-soft:0 1px 2px rgba(0,0,0,0.30);--shadow-card:0 1px 3px rgba(0,0,0,0.20),0 6px 16px rgba(0,0,0,0.15);--shadow-elevated:0 4px 12px rgba(0,0,0,0.25),0 16px 40px rgba(0,0,0,0.20);--shadow-nav:0 18px 50px rgba(0,0,0,0.40);--overlay-dim:rgba(2,6,23,0.65);--glass-surface:rgba(10,20,40,0.82);--glass-surface-strong:rgba(10,20,40,0.92);--glass-border:rgba(26,45,74,0.72);--glass-shadow:0 18px 50px rgba(0,0,0,0.38)}