:root{--font-primary: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-heading: "Outfit", sans-serif;--font-code: "Fira Code", monospace;--bg-dark: #090D16;--bg-card: #111827;--bg-card-hover: #1F2937;--bg-glass: rgba(17, 24, 39, .75);--bg-sidebar: #0F172A;--border-color: rgba(255, 255, 255, .08);--border-highlight: rgba(217, 119, 6, .3);--accent-gold: #F59E0B;--accent-gold-dark: #D97706;--accent-blue: #3B82F6;--accent-blue-dark: #2563EB;--accent-cyan: #06B6D4;--accent-emerald: #10B981;--accent-purple: #8B5CF6;--accent-rose: #F43F5E;--text-main: #F9FAFB;--text-muted: #9CA3AF;--text-dim: #6B7280;--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .5), 0 8px 10px -6px rgba(0, 0, 0, .5);--shadow-glow: 0 0 25px rgba(245, 158, 11, .15);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--color-primary: #004ac6;--color-primary-container: #2563eb;--color-on-primary: #ffffff;--color-on-primary-container: #eeefff;--color-secondary: #006c49;--color-secondary-container: 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var(--accent-gold);border-radius:var(--radius-md);padding:20px;margin-bottom:28px}.analogy-header{display:flex;align-items:center;gap:10px;color:var(--accent-gold);font-weight:700;font-size:1rem;margin-bottom:8px;text-transform:uppercase;letter-spacing:.04em}.analogy-content{color:#e2e8f0;font-size:1.02rem;line-height:1.7}pre code{font-family:var(--font-code);font-size:.9rem;background:#0b0f19;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md);padding:16px;display:block;overflow-x:auto;color:#38bdf8;margin:16px 0}.quiz-option{background:#0f172a99;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md);padding:16px 20px;margin-bottom:12px;cursor:pointer;display:flex;align-items:flex-start;gap:14px;transition:all .2s ease}.quiz-option:hover{border-color:#ffffff40;background:#1e293bb3}.quiz-option.selected{border-color:var(--accent-blue);background:#3b82f626}.quiz-option.correct{border-color:var(--accent-emerald);background:#10b98126}.quiz-option.incorrect{border-color:var(--accent-rose);background:#f43f5e26}.video-card{background:#0f172a;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-md);overflow:hidden;margin-top:16px;margin-bottom:16px;transition:border-color .2s ease}.video-card:hover{border-color:#3b82f666}.video-embed-responsive{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:0!important}.video-embed-responsive 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