@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap";:root{--font-sans:"Outfit", "Inter", "Noto Sans SC", system-ui, -apple-system, sans-serif;--bg-primary:#080c14;--bg-secondary:#0f172a;--bg-card:#121a2fb8;--bg-card-hover:#1a2644e0;--bg-card-active:#24345ef2;--border-color:#ffffff17;--border-glow:#6366f173;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--accent-indigo:#6366f1;--accent-cyan:#06b6d4;--accent-purple:#8b5cf6;--accent-emerald:#10b981;--accent-amber:#f59e0b;--accent-rose:#f43f5e}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);background-image:radial-gradient(at 10% 20%,#6366f129 0,#0000 55%),radial-gradient(at 90% 15%,#06b6d424 0,#0000 50%),radial-gradient(at 50% 85%,#8b5cf61f 0,#0000 55%),linear-gradient(#ffffff05 1px,#0000 1px),linear-gradient(90deg,#ffffff05 1px,#0000 1px);background-size:100% 100%,100% 100%,100% 100%,36px 36px,36px 36px;background-attachment:fixed;min-height:100vh;overflow-x:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#0f172acc}::-webkit-scrollbar-thumb{background:#6366f173;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#6366f1bf}.glass-panel{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-color);border-radius:18px;transition:all .3s cubic-bezier(.16,1,.3,1);box-shadow:0 12px 35px -12px #000000a6}.glass-panel:hover{border-color:#ffffff2e;box-shadow:0 18px 40px -12px #6366f133}.glass-panel-interactive{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-color);cursor:pointer;border-radius:18px;transition:all .3s cubic-bezier(.16,1,.3,1);box-shadow:0 10px 30px -10px #00000080}.glass-panel-interactive:hover{background:var(--bg-card-hover);border-color:var(--border-glow);transform:translateY(-3px);box-shadow:0 20px 45px -15px #6366f147}.text-gradient{background:linear-gradient(135deg,#818cf8 0%,#38bdf8 50%,#c084fc 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.text-gradient-gold{background:linear-gradient(135deg,#fbbf24 0%,#f59e0b 50%,#d97706 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.text-gradient-emerald{background:linear-gradient(135deg,#34d399 0%,#10b981 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text}@keyframes pulse-glow{0%,to{opacity:.6;transform:scale(1)}50%{opacity:1;transform:scale(1.04)}}.animate-pulse-glow{animation:3s ease-in-out infinite pulse-glow}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.animate-float{animation:4s ease-in-out infinite float}.badge{letter-spacing:.02em;border-radius:9999px;align-items:center;gap:6px;padding:4px 12px;font-size:.75rem;font-weight:600;display:inline-flex}.badge-indigo{color:#a5b4fc;background:#6366f12e;border:1px solid #6366f159}.badge-cyan{color:#67e8f9;background:#06b6d42e;border:1px solid #06b6d459}.badge-emerald{color:#6ee7b7;background:#10b9812e;border:1px solid #10b98159}.badge-amber{color:#fde047;background:#f59e0b2e;border:1px solid #f59e0b59}.badge-rose{color:#fda4af;background:#f43f5e2e;border:1px solid #f43f5e59}.btn-primary{color:#fff;cursor:pointer;background:linear-gradient(135deg,#6366f1 0%,#4f46e5 100%);border:none;border-radius:12px;align-items:center;gap:8px;padding:10px 20px;font-weight:600;transition:all .2s;display:inline-flex;box-shadow:0 4px 15px #6366f159}.btn-primary:hover{background:linear-gradient(135deg,#818cf8 0%,#6366f1 100%);transform:translateY(-1px);box-shadow:0 6px 22px #6366f18c}.btn-secondary{color:#e2e8f0;cursor:pointer;background:#1e293bbf;border:1px solid #ffffff24;border-radius:12px;align-items:center;gap:8px;padding:10px 20px;font-weight:500;transition:all .2s;display:inline-flex}.btn-secondary:hover{background:#334155d9;border-color:#ffffff47;transform:translateY(-1px)}.btn-icon{color:#e2e8f0;cursor:pointer;background:#1e293b99;border:1px solid #ffffff1a;border-radius:12px;justify-content:center;align-items:center;width:40px;height:40px;transition:all .2s;display:flex}.btn-icon:hover{color:#fff;background:#6366f140;border-color:#6366f180}.nav-tab{color:var(--text-secondary);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:12px;align-items:center;gap:8px;padding:10px 18px;font-size:.95rem;font-weight:600;transition:all .25s;display:flex}.nav-tab:hover{color:var(--text-primary);background:#ffffff0d}.nav-tab.active{color:#fff;background:linear-gradient(135deg,#6366f147 0%,#06b6d42e 100%);border-color:#6366f180;box-shadow:0 4px 15px #6366f133}.option-btn{color:var(--text-primary);cursor:pointer;text-align:left;background:#0f172aa6;border:1px solid #ffffff14;border-radius:14px;align-items:flex-start;gap:14px;width:100%;padding:14px 18px;transition:all .2s cubic-bezier(.16,1,.3,1);display:flex}.option-btn:hover{background:#1e293bd9;border-color:#6366f166}.option-btn.selected{background:#6366f140;border-color:#6366f1;box-shadow:0 0 15px #6366f140}.option-btn.correct{background:#10b98140;border-color:#10b981;box-shadow:0 0 15px #10b98140}.option-btn.wrong{background:#f43f5e40;border-color:#f43f5e}.app-container{flex-direction:column;min-height:100vh;display:flex;position:relative}.main-content{flex-direction:column;flex:1;width:100%;max-width:1600px;margin:0 auto;padding:1.5rem 2rem 3rem;display:flex}@media (width<=768px){.main-content{padding:1rem}}.dual-track-grid{grid-template-columns:1fr 1fr;gap:1.8rem;margin-top:1.5rem;display:grid}@media (width<=1100px){.dual-track-grid{grid-template-columns:1fr}}.practice-grid{grid-template-columns:1.15fr .85fr;gap:1.8rem;display:grid}@media (width<=1024px){.practice-grid{grid-template-columns:1fr}}