:root{--bg-main: #090d16;--bg-card: rgba(18, 26, 43, .75);--bg-card-hover: rgba(28, 39, 64, .9);--bg-modal: rgba(13, 19, 32, .96);--bg-glass: rgba(255, 255, 255, .05);--border-color: rgba(255, 255, 255, .09);--border-glow: rgba(99, 102, 241, .4);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--primary-accent: #6366f1;--primary-glow: rgba(99, 102, 241, .35);--secondary-accent: #a855f7;--emerald-accent: #10b981;--cyan-accent: #06b6d4;--amber-accent: #f59e0b;--chatgpt-color: #10a37f;--gemini-color: #4285f4;--microsoft-color: #0078d4;--canva-color: #00c4cc;--dropbox-color: #0061ff;--font-heading: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, sans-serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-full: 9999px;--shadow-card: 0 10px 30px -5px rgba(0, 0, 0, .5);--shadow-glow: 0 0 25px rgba(99, 102, 241, .25);--transition: all .3s cubic-bezier(.4, 0, .2, 1)}[data-theme=light]{--bg-main: #f8fafc;--bg-card: rgba(255, 255, 255, .88);--bg-card-hover: #ffffff;--bg-modal: rgba(255, 255, 255, .98);--bg-glass: rgba(0, 0, 0, .04);--border-color: rgba(0, 0, 0, .09);--border-glow: rgba(99, 102, 241, .3);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--shadow-card: 0 10px 30px -5px rgba(0, 0, 0, .08)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-body);background-color:var(--bg-main);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden;transition:background-color .4s ease,color .4s ease}.bg-glow-container{position:fixed;top:0;left:0;width:100vw;height:100vh;pointer-events:none;z-index:0;overflow:hidden}.glow-orb{position:absolute;border-radius:50%;filter:blur(120px);opacity:.25;animation:floatOrb 18s infinite alternate ease-in-out}.glow-orb-1{top:-10%;left:10%;width:500px;height:500px;background:radial-gradient(circle,var(--primary-accent),var(--secondary-accent))}.glow-orb-2{bottom:10%;right:5%;width:600px;height:600px;background:radial-gradient(circle,var(--canva-color),var(--gemini-color));animation-delay:-6s}@keyframes floatOrb{0%{transform:translate(0) scale(1)}50%{transform:translate(60px,-40px) scale(1.1)}to{transform:translate(-40px,60px) scale(.9)}}.app-container{position:relative;z-index:1;max-width:1280px;margin:0 auto;padding:0 1.5rem}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);letter-spacing:-.02em;font-weight:700}.gradient-text{background:linear-gradient(135deg,#6366f1,#a855f7,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.4rem;font-size:.95rem;font-weight:600;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;transition:var(--transition);text-decoration:none;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,var(--primary-accent),var(--secondary-accent));color:#fff;box-shadow:0 4px 14px #6366f159}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f180;filter:brightness(1.1)}.btn-secondary{background:var(--bg-card);border-color:var(--border-color);color:var(--text-primary);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--primary-accent);transform:translateY(-2px)}.btn-sm{padding:.4rem .85rem;font-size:.85rem;border-radius:var(--radius-sm)}.badge{display:inline-flex;align-items:center;gap:.4rem;padding:.3rem .8rem;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.badge-glow{background:#6366f126;color:#818cf8;border:1px solid rgba(99,102,241,.3)}.badge-emerald{background:#10b98126;color:#34d399;border:1px solid rgba(16,185,129,.3)}.badge-amber{background:#f59e0b26;color:#fbbf24;border:1px solid rgba(245,158,11,.3)}.glass-card{background:var(--bg-card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);transition:var(--transition)}.glass-card:hover{border-color:var(--border-glow);box-shadow:0 12px 35px -5px #0006,var(--shadow-glow)}.navbar{position:sticky;top:0;z-index:100;background:#090d16d9;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-color);padding:1rem 0}[data-theme=light] .navbar{background:#f8fafce0}.nav-container{display:flex;align-items:center;justify-content:space-between}.logo{display:flex;align-items:center;gap:.75rem;font-family:var(--font-heading);font-weight:800;font-size:1.35rem;text-decoration:none;color:var(--text-primary)}.logo-icon{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary-accent),var(--secondary-accent));display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 0 15px var(--primary-glow)}.nav-links{display:flex;align-items:center;gap:1.5rem;list-style:none}.nav-link{color:var(--text-secondary);text-decoration:none;font-weight:500;font-size:.95rem;transition:var(--transition)}.nav-link:hover{color:var(--primary-accent)}.modal-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000000c7;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:1.5rem;opacity:0;pointer-events:none;transition:opacity .25s ease}.modal-overlay.active{opacity:1;pointer-events:auto}.modal-content{background:var(--bg-modal);border:1px solid var(--border-color);border-radius:var(--radius-lg);max-width:800px;width:100%;max-height:90vh;overflow-y:auto;padding:2rem;position:relative;transform:translateY(20px);transition:transform .3s cubic-bezier(.16,1,.3,1)}.modal-overlay.active .modal-content{transform:translateY(0)}.close-btn{position:absolute;top:1.25rem;right:1.25rem;background:var(--bg-glass);border:1px solid var(--border-color);color:var(--text-secondary);border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.1rem}.close-btn:hover{background:#ffffff1a;color:var(--text-primary)}.quiz-opt-btn{width:100%;text-align:left;padding:.85rem 1.25rem;border-radius:var(--radius-md);background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-primary);cursor:pointer;transition:var(--transition);margin-bottom:.6rem;font-size:.95rem}.quiz-opt-btn:hover,.quiz-opt-btn.selected{background:#6366f133;border-color:var(--primary-accent)}@media (max-width: 768px){.nav-links{display:none}}