@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap";:root{--primary:#4f46e5;--primary-hover:#4338ca;--secondary:#10b981;--bg-gradient-start:#0f172a;--bg-gradient-end:#1e293b;--surface:#1e293bb3;--surface-hover:#1e293be6;--border:#ffffff1a;--text-main:#f8fafc;--text-muted:#94a3b8;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-full:9999px;--glass-blur:blur(12px);--shadow-sm:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-md:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--shadow-glow:0 0 20px #4f46e54d}*{box-sizing:border-box;margin:0;padding:0}body{background:linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));color:var(--text-main);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:Inter,sans-serif;overflow-x:hidden}h1,h2,h3,h4,h5,h6{letter-spacing:-.02em;font-family:Outfit,sans-serif;font-weight:600}.glass-panel{background:var(--surface);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:all .3s}.glass-panel:hover{background:var(--surface-hover);border-color:#fff3}.btn{border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-family:Inter,sans-serif;font-size:.95rem;font-weight:500;transition:all .2s cubic-bezier(.4,0,.2,1);display:inline-flex}.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-glow)}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 0 25px #4f46e580}.btn-secondary{color:var(--text-main);border:1px solid var(--border);background:0 0}.btn-secondary:hover{background:#ffffff0d;border-color:#fff3}.input-group{flex-direction:column;gap:.5rem;margin-bottom:1rem;display:flex}.input-label{color:var(--text-muted);font-size:.875rem;font-weight:500}.input-field{border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-main);background:#0f172a99;outline:none;padding:.875rem 1rem;font-family:Inter,sans-serif;transition:all .2s}.input-field:focus{border-color:var(--primary);box-shadow:0 0 0 2px #4f46e533}textarea.input-field{resize:vertical;min-height:100px}.container{max-width:1200px;margin:0 auto;padding:2rem}.navbar{-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--border);z-index:50;background:#0f172a66;justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex;position:sticky;top:0}.nav-links{align-items:center;gap:1.5rem;display:flex}.nav-item{color:var(--text-muted);font-weight:500;text-decoration:none;transition:color .2s}.nav-item:hover,.nav-item.active{color:var(--text-main)}.brand{background:linear-gradient(90deg,#6366f1,#10b981);-webkit-text-fill-color:transparent;-webkit-background-clip:text;align-items:center;gap:.5rem;font-family:Outfit,sans-serif;font-size:1.5rem;font-weight:700;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.4s forwards fadeIn}.badge{border-radius:var(--radius-full);color:#818cf8;text-transform:uppercase;letter-spacing:.05em;background:#4f46e533;padding:.25rem .75rem;font-size:.75rem;font-weight:600;display:inline-flex}.badge-easy{color:#34d399;background:#10b98133}.badge-medium{color:#fbbf24;background:#f59e0b33}.badge-hard{color:#f87171;background:#ef444433}.grid-2{grid-template-columns:repeat(2,1fr);gap:1.5rem;display:grid}.grid-3{grid-template-columns:repeat(3,1fr);gap:1.5rem;display:grid}@media (width<=768px){.grid-2,.grid-3{grid-template-columns:1fr}}.spinner{border:3px solid #ffffff1a;border-top-color:var(--primary);border-radius:50%;width:24px;height:24px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}