:root{--bg-base:#0B0D1A;--bg-surface:#111328;--bg-elevated:#181B33;--bg-card:#1D2040;--bg-overlay:rgba(11, 13, 26, 0.85);--brand:#7C3AED;--brand-light:#9B6DFF;--brand-dark:#5B21B6;--brand-glow:rgba(124, 58, 237, 0.35);--brand-glow-soft:rgba(124, 58, 237, 0.15);--accent:#06B6D4;--accent-light:#22D3EE;--accent-glow:rgba(6, 182, 212, 0.25);--ans-a-from:#E0297A;--ans-a-to:#9D0050;--ans-a-glow:rgba(224, 41, 122, 0.4);--ans-b-from:#2563EB;--ans-b-to:#1340B0;--ans-b-glow:rgba(37, 99, 235, 0.4);--ans-c-from:#059669;--ans-c-to:#065F46;--ans-c-glow:rgba(5, 150, 105, 0.4);--ans-d-from:#D97706;--ans-d-to:#92400E;--ans-d-glow:rgba(217, 119, 6, 0.4);--correct:#10B981;--correct-bg:rgba(16, 185, 129, 0.12);--correct-border:rgba(16, 185, 129, 0.6);--correct-glow:rgba(16, 185, 129, 0.35);--incorrect:#EF4444;--incorrect-bg:rgba(239, 68, 68, 0.12);--incorrect-border:rgba(239, 68, 68, 0.6);--incorrect-glow:rgba(239, 68, 68, 0.35);--text-primary:#EEF2FF;--text-secondary:#9AA5BF;--text-muted:#5C6480;--text-inverse:#0B0D1A;--border:rgba(255, 255, 255, 0.07);--border-hover:rgba(255, 255, 255, 0.15);--border-focus:var(--brand-light);--modal-accent:var(--brand);--modal-accent-strong:var(--brand-light);--modal-accent-soft:rgba(124, 58, 237, 0.16);--modal-surface:var(--bg-elevated);--modal-surface-muted:var(--bg-card);--modal-text:var(--text-primary);--modal-text-muted:var(--text-secondary);--modal-button-text:#FFFFFF;--modal-border:var(--border);--modal-overlay:rgba(8, 9, 20, 0.72);--modal-shadow:0 24px 64px rgba(0, 0, 0, 0.55);--gold:#F59E0B;--silver:#94A3B8;--bronze:#CD7C4D;--grad-hero:linear-gradient(135deg, #0B0D1A 0%, #1A1040 50%, #0B1A2E 100%);--grad-brand:linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);--grad-accent:linear-gradient(135deg, var(--accent) 0%, #0284C7 100%);--grad-header:linear-gradient(190deg, #4338CA 5%, #5B21B6 66%, #7C3AED 100%);--grad-card:linear-gradient(145deg, 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