:root{--color-navy-950:#060b14;--color-navy-900:#0b1120;--color-navy-800:#0f172a;--color-navy-700:#1e293b;--color-navy-600:#334155;--color-navy-500:#475569;--color-navy-400:#64748b;--color-navy-300:#94a3b8;--color-navy-200:#cbd5e1;--color-navy-100:#e2e8f0;--color-navy-50:#f1f5f9;--color-blue-600:#1d4ed8;--color-blue-500:#2563eb;--color-blue-400:#3b82f6;--color-blue-300:#60a5fa;--color-blue-200:#93c5fd;--color-blue-100:#bfdbfe;--color-teal-600:#0f766e;--color-teal-500:#14b8a6;--color-teal-400:#2dd4bf;--color-gold-500:#d97706;--color-gold-400:#f59e0b;--color-gold-300:#fbbf24;--color-success:#10b981;--color-warning:#f59e0b;--color-error:#ef4444;--bg-primary:var(--color-navy-900);--bg-secondary:var(--color-navy-800);--bg-tertiary:var(--color-navy-700);--bg-header:#0b1120bf;--bg-user-bubble:linear-gradient(135deg,var(--color-blue-500)0%,var(--color-blue-600)100%);--bg-assistant-bubble:#1e293b99;--bg-thinking:#f59e0b14;--bg-tool-call:#14b8a614;--bg-tool-result:#3b82f60f;--text-primary:var(--color-navy-50);--text-secondary:var(--color-navy-300);--text-tertiary:var(--color-navy-400);--text-inverse:#fff;--text-link:var(--color-blue-400);--border-light:#ffffff14;--border-medium:#ffffff26;--border-thinking:var(--color-gold-400);--border-tool:var(--color-teal-400);--shadow-sm:0 1px 2px #0000004d;--shadow-md:0 4px 12px #0006;--shadow-lg:0 8px 24px #00000080;--shadow-xl:0 16px 48px #0009;--shadow-glow-blue:0 0 20px #2563eb66;--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-serif:"Playfair Display",Georgia,serif;--font-mono:"JetBrains Mono","Fira Code",ui-monospace,monospace;--text-xs:.75rem;--text-sm:.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:1.875rem;--text-4xl:2.25rem;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--radius-sm:.375rem;--radius-md:.5rem;--radius-lg:.75rem;--radius-xl:1rem;--radius-2xl:1.5rem;--radius-full:999px;--transition-fast:.15s cubic-bezier(.4,0,.2,1);--transition-base:.25s cubic-bezier(.4,0,.2,1);--transition-slow:.35s cubic-bezier(.4,0,.2,1);--header-height:80px;--sidebar-width:360px;--max-content-width:1400px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}body{font-family:var(--font-sans);color:var(--text-primary);background-color:var(--bg-primary);min-height:100vh;line-height:1.6}a{color:var(--text-link);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--color-blue-500)}button{font-family:var(--font-sans);cursor:pointer;font-size:var(--text-sm);background:0 0;border:none}input,textarea,select{font-family:var(--font-sans);font-size:var(--text-sm)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--color-navy-300);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-navy-500)}.btn{justify-content:center;align-items:center;gap:var(--space-2);padding:var(--space-2)var(--space-4);border-radius:var(--radius-md);font-weight:500;font-size:var(--text-sm);transition:all var(--transition-fast);white-space:nowrap;display:inline-flex}.btn-primary{background:var(--bg-user-bubble);color:var(--text-inverse);box-shadow:var(--shadow-sm)}.btn-primary:hover{box-shadow:var(--shadow-glow-blue);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border-light)}.btn-secondary:hover{background:var(--bg-tertiary);border-color:var(--border-medium)}.btn-ghost{color:var(--text-secondary)}.btn-ghost:hover{background:var(--bg-tertiary);color:var(--text-primary)}.btn-danger{background:var(--color-error);color:var(--text-inverse)}.btn-danger:hover{opacity:.9}.btn-teal{background:linear-gradient(135deg,var(--color-teal-600)0%,var(--color-teal-500)100%);color:var(--text-inverse);box-shadow:var(--shadow-sm)}.btn-teal:hover{transform:translateY(-1px);box-shadow:0 0 20px #14b8a64d}.btn-sm{padding:var(--space-1)var(--space-3);font-size:var(--text-xs)}.btn-icon{padding:var(--space-2);border-radius:var(--radius-md)}.card{background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);color:var(--text-primary)}.input{width:100%;padding:var(--space-2)var(--space-3);border:1px solid var(--border-light);border-radius:var(--radius-md);background:var(--bg-secondary);color:var(--text-primary);transition:border-color var(--transition-fast),box-shadow var(--transition-fast);outline:none}.input:focus{border-color:var(--color-blue-500);box-shadow:0 0 0 3px #3b82f626}.input::placeholder{color:var(--text-tertiary)}.label{font-size:var(--text-sm);color:var(--text-primary);margin-bottom:var(--space-1);font-weight:600;display:block}.select{width:100%;padding:var(--space-2)var(--space-3);border:1px solid var(--border-light);border-radius:var(--radius-md);background:var(--bg-secondary);color:var(--text-primary);cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-position:right 12px center;background-repeat:no-repeat;outline:none;padding-right:36px}.select:focus{border-color:var(--color-blue-500);box-shadow:0 0 0 3px #3b82f626}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:.4}50%{opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes thoughtPulse{0%,to{border-color:#eab30833}50%{border-color:#eab30880}}.animate-fade-in{animation:fadeIn var(--transition-base)ease-out}.animate-slide-up{animation:slideUp var(--transition-slow)ease-out}.badge{align-items:center;gap:var(--space-1);padding:2px var(--space-2);border-radius:var(--radius-full);font-size:var(--text-xs);font-weight:500;display:inline-flex}.badge-blue{color:var(--color-blue-300);background:#2563eb33}.badge-teal{color:var(--color-teal-400);background:#14b8a626}.badge-gold{color:var(--color-gold-300);background:#f59e0b26}.overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;background:#0f172a80;justify-content:center;align-items:center;animation:.2s ease-out fadeIn;display:flex;position:fixed;inset:0}.modal{background:var(--bg-secondary);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);width:90%;max-width:560px;max-height:85vh;animation:.3s ease-out slideUp;overflow-y:auto}.modal-header{padding:var(--space-6);padding-bottom:var(--space-4)}.modal-body{padding:0 var(--space-6)var(--space-6)}.modal-footer{padding:var(--space-4)var(--space-6);border-top:1px solid var(--border-light);justify-content:flex-end;gap:var(--space-3);display:flex}