:root{--primary:#2563eb;--primary-hover:#1d4ed8;--primary-light:#dbeafe;--primary-dark:#1e40af;--secondary:#6366f1;--secondary-hover:#4f46e5;--secondary-light:#e0e7ff;--secondary-dark:#4338ca;--success:#10b981;--success-hover:#059669;--success-light:#d1fae5;--success-dark:#047857;--danger:#ef4444;--danger-hover:#dc2626;--danger-light:#fee2e2;--danger-dark:#b91c1c;--warning:#f59e0b;--warning-hover:#d97706;--warning-light:#fef3c7;--warning-dark:#b45309;--info:#3b82f6;--info-hover:#2563eb;--info-light:#dbeafe;--info-dark:#1d4ed8;--bg:#ffffff;--fg:#0f172a;--muted-fg:#64748b;--muted-bg:#f8fafc;--navbar:#bfdbfe;--navbar-fg:#1e3a8a;--card:#ffffff;--card-fg:#0f172a;--border:#e2e8f0;--border-hover:#cbd5e1;--shadow-xs:0 1px 2px 0 rgb(0 0 0/0.05);--shadow-sm:0 1px 3px 0 rgb(0 0 0/0.1),0 1px 2px -1px rgb(0 0 0/0.1);--shadow-md:0 4px 6px -1px rgb(0 0 0/0.1),0 2px 4px -2px rgb(0 0 0/0.1);--shadow-lg:0 10px 15px -3px rgb(0 0 0/0.1),0 4px 6px -4px rgb(0 0 0/0.1);--shadow-xl:0 20px 25px -5px rgb(0 0 0/0.1),0 8px 10px -6px rgb(0 0 0/0.1);--gradient-primary:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);--gradient-secondary:linear-gradient(135deg,var(--secondary) 0%,var(--secondary-dark) 100%);--gradient-blue:linear-gradient(135deg,#60a5fa,#3b82f6);--gradient-purple:linear-gradient(135deg,#a78bfa,#8b5cf6);--gradient-success:linear-gradient(135deg,#34d399,#10b981);--gradient-danger:linear-gradient(135deg,#f87171,#ef4444);--radius-sm:0.125rem;--radius-md:0.375rem;--radius-lg:0.5rem;--radius-xl:0.75rem;--radius-2xl:1rem;--radius-full:9999px;--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition-normal:250ms cubic-bezier(0.4,0,0.2,1);--transition-slow:350ms cubic-bezier(0.4,0,0.2,1);--breakpoint-sm:640px;--breakpoint-md:768px;--breakpoint-lg:1024px;--breakpoint-xl:1280px;--breakpoint-2xl:1536px}.dark{--bg:#0f172a;--fg:#f8fafc;--muted-fg:#94a3b8;--muted-bg:#1e293b;--navbar:#1e3a8a;--navbar-fg:#bfdbfe;--card:#1e293b;--card-fg:#f8fafc;--border:#334155;--border-hover:#475569;--primary-light:#1e40af}.card{box-shadow:var(--shadow-sm);transition:transform var(--transition-normal),box-shadow var(--transition-normal)}.card:hover{box-shadow:var(--shadow-md)}.premium-gradient-text{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;color:transparent}.premium-card{background:linear-gradient(135deg,var(--bg) 0,var(--muted-bg) 100%);border:1px solid var(--border);box-shadow:var(--shadow-md);position:relative;overflow:hidden}.premium-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary)}.premium-button{background:var(--gradient-primary);color:white;font-weight:500;border:none;box-shadow:var(--shadow-sm);transition:all var(--transition-normal)}.premium-button:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.premium-badge{background:var(--gradient-blue);color:white;font-weight:500;padding:.25rem .75rem;border-radius:var(--radius-full);font-size:.75rem;letter-spacing:.025em;box-shadow:var(--shadow-sm)}.premium-input{border:1px solid var(--border);border-radius:var(--radius-md);padding:.5rem .75rem;transition:all var(--transition-fast);box-shadow:var(--shadow-xs)}.premium-input:focus{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}.premium-table{border-collapse:separate;border-spacing:0;width:100%;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);padding:.5rem}.premium-table th{background:var(--muted-bg);font-weight:500;text-align:left;padding:.75rem 1rem;border-bottom:1px solid var(--border)}.premium-table td{padding:.75rem 1rem;border-top:1px solid var(--border)}.premium-table tr:hover td{background:var(--muted-bg)}.premium-table table{width:100%;padding:.5rem}.niche-radar-header{background:var(--gradient-primary);color:white;padding:1.5rem;border-radius:var(--radius-lg);margin-bottom:1.5rem;box-shadow:var(--shadow-md)}.niche-radar-icon{color:var(--primary);background:white;border-radius:var(--radius-full);padding:.5rem;box-shadow:var(--shadow-md)}.category-selector,.marketplace-selector{border:1px solid var(--border);border-radius:var(--radius-lg);padding:.5rem;background:var(--bg);box-shadow:var(--shadow-sm)}