: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}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-primary);background-color:var(--bg-dark);color:var(--text-main);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);letter-spacing:-.02em;font-weight:700;color:#fff}button,input,select,textarea{font-family:inherit}.material-symbols-outlined{font-variation-settings:"FILL" 0,"wght" 400,"GRAD" 0,"opsz" 24;display:inline-block;line-height:1;text-transform:none;letter-spacing:normal;word-wrap:normal;white-space:nowrap;direction:ltr}.hide-scrollbar::-webkit-scrollbar{display:none}.hide-scrollbar{-ms-overflow-style:none;scrollbar-width:none}.glass-effect{background:#fffc;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-5px)}to{transform:translateY(0)}}.animate-float{animation:float 3s ease-in-out infinite}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#0b1120}::-webkit-scrollbar-thumb{background:#1e293b;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#334155}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes pulseGlow{0%,to{box-shadow:0 0 15px #f59e0b33}50%{box-shadow:0 0 30px #f59e0b66}}.animate-fade{animation:fadeIn .35s ease-out forwards}.glass-panel{background:var(--bg-glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius-md)}.glass-card{background:linear-gradient(180deg,#1e293b99,#0f172acc);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg);transition:all .25s cubic-bezier(.4,0,.2,1)}.glass-card:hover{border-color:#f59e0b66;transform:translateY(-4px);box-shadow:0 12px 30px -10px #000c,0 0 20px #f59e0b1f}.badge-gold{background:#f59e0b26;color:var(--accent-gold);border:1px solid rgba(245,158,11,.3);padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;display:inline-flex;align-items:center;gap:6px}.badge-blue{background:#3b82f626;color:var(--accent-blue);border:1px solid rgba(59,130,246,.3);padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600;display:inline-flex;align-items:center;gap:6px}.btn-primary{background:linear-gradient(135deg,var(--accent-gold) 0%,var(--accent-gold-dark) 100%);color:#000;font-weight:700;padding:12px 24px;border-radius:var(--radius-md);border:none;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:all .2s ease;box-shadow:0 4px 14px #d9770659}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px #f59e0b80;filter:brightness(1.1)}.btn-secondary{background:#ffffff0f;color:var(--text-main);font-weight:600;padding:12px 24px;border-radius:var(--radius-md);border:1px solid var(--border-color);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:all .2s ease}.btn-secondary:hover{background:#ffffff1f;border-color:#fff3}.btn-outline-gold{background:transparent;color:var(--accent-gold);border:1px solid var(--accent-gold);font-weight:600;padding:10px 20px;border-radius:var(--radius-md);cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:all .2s ease}.btn-outline-gold:hover{background:#f59e0b1a;box-shadow:0 0 15px #f59e0b33}.analogy-banner{background:linear-gradient(135deg,#f59e0b1f,#3b82f614);border:1px solid rgba(245,158,11,.35);border-left:5px solid 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 iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}@media(max-width:768px){.font-headline-md,h3.font-headline-md,h4.font-headline-md{font-weight:500!important;font-size:.95rem!important;line-height:1.45!important;letter-spacing:-.01em!important}.font-headline-lg-mobile,h1.font-headline-lg-mobile,h2.font-headline-lg-mobile{font-weight:600!important;font-size:1.15rem!important;letter-spacing:-.01em!important}.font-headline-lg{font-weight:600!important;font-size:1.05rem!important}.text-headline-md{font-size:.95rem!important;line-height:1.45!important}.text-headline-lg-mobile{font-size:1.15rem!important;line-height:1.35!important}.text-headline-lg{font-size:1.05rem!important}}