:root{--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--color-primary-50: #eef2ff;--color-primary-100: #e0e7ff;--color-primary-500: #6366f1;--color-primary-600: #4f46e5;--color-primary-700: #4338ca;--color-slate-50: #f8fafc;--color-slate-100: #f1f5f9;--color-slate-200: #e2e8f0;--color-slate-300: #cbd5e1;--color-slate-400: #94a3b8;--color-slate-500: #64748b;--color-slate-600: #475569;--color-slate-700: #334155;--color-slate-800: #1e293b;--color-slate-900: #0f172a;--color-success: #10b981;--color-warning: #f59e0b;--color-error: #ef4444;--bg-body: var(--color-slate-50);--bg-surface: #ffffff;--bg-sidebar: #ffffff;--bg-hover: var(--color-slate-50);--text-primary: var(--color-slate-900);--text-secondary: var(--color-slate-500);--text-inverse: #ffffff;--border-color: var(--color-slate-200);--border-focus: var(--color-primary-500);--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem}[data-theme=dark]{--bg-body: #0f172a;--bg-surface: #1e293b;--bg-sidebar: #0f172a;--bg-hover: #334155;--text-primary: #f8fafc;--text-secondary: #94a3b8;--border-color: #334155;--border-focus: #6366f1}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-body);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;transition:background-color .3s,color .3s}.container{max-width:1200px;margin:0 auto;padding:0 1rem}h1,h2,h3,h4,h5,h6{color:var(--text-primary);font-weight:600;line-height:1.25}h1{font-size:1.875rem}h2{font-size:1.5rem}h3{font-size:1.25rem}p{color:var(--text-secondary)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.5rem 1rem;font-size:.875rem;font-weight:500;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;transition:all .2s;gap:.5rem}.btn-primary{background-color:var(--color-primary-600);color:#fff}.btn-primary:hover{background-color:var(--color-primary-700)}.btn-primary:disabled{opacity:.7;cursor:not-allowed}.btn-secondary{background-color:var(--bg-surface);border-color:var(--border-color);color:var(--text-primary)}.btn-secondary:hover{background-color:var(--bg-hover)}.btn-danger{background-color:transparent;border-color:var(--color-error);color:var(--color-error)}.btn-danger:hover{background-color:#fef2f2}[data-theme=dark] .btn-danger:hover{background-color:#ef44441a}.btn-sm{padding:.25rem .75rem;font-size:.75rem}.input,.select{display:block;width:100%;padding:.5rem .75rem;font-size:.875rem;line-height:1.5;color:var(--text-primary);background-color:var(--bg-surface);background-clip:padding-box;border:1px solid var(--border-color);border-radius:var(--radius-md);transition:border-color .15s ease-in-out,box-shadow .15s ease-in-out}.input:focus,.select:focus{border-color:var(--border-focus);outline:0;box-shadow:0 0 0 2px var(--color-primary-100)}[data-theme=dark] .input:focus{box-shadow:0 0 0 2px #6366f133}.card{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow-sm)}.badge{display:inline-flex;align-items:center;padding:.125rem .5rem;font-size:.75rem;font-weight:500;border-radius:9999px}.badge-primary{background-color:var(--color-primary-50);color:var(--color-primary-700)}[data-theme=dark] .badge-primary{background-color:#4f46e533;color:#a5b4fc}.badge-success{background-color:#ecfdf5;color:#047857}[data-theme=dark] .badge-success{background-color:#10b98133;color:#6ee7b7}.badge-warning{background-color:#fef3c7;color:#92400e}[data-theme=dark] .badge-warning{background-color:#f59e0b33;color:#fcd34d}.flex-between{display:flex;justify-content:space-between;align-items:center}.flex-gap-sm{display:flex;gap:.5rem;align-items:center}.text-muted{color:var(--text-secondary)}.text-sm{font-size:.875rem}.text-xs{font-size:.75rem}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.grid-responsive{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.flex-center{display:flex;align-items:center;justify-content:center}.flex-col{display:flex;flex-direction:column}.h-full{height:100%}.w-full{width:100%}.modal-overlay{position:fixed;inset:0;background-color:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:50;animation:fadeIn .2s ease-out}.modal-content{width:100%;max-width:400px;animation:slideUp .3s ease-out}.chat-layout{display:flex;height:calc(100vh - 140px);gap:1.5rem;overflow:hidden}.chat-sidebar{width:300px;flex-shrink:0;display:flex;flex-direction:column;gap:1rem;overflow-y:auto}.chat-main{flex:1;display:flex;flex-direction:column;position:relative;background-color:var(--bg-surface);border-radius:var(--radius-lg);border:1px solid var(--border-color);overflow:hidden;box-shadow:var(--shadow-sm)}.message-list{flex:1;overflow-y:auto;padding:2rem;display:flex;flex-direction:column;gap:2rem}.message-bubble{max-width:85%;padding:1rem 1.5rem;border-radius:1.5rem;line-height:1.6;position:relative}.message-user{align-self:flex-end;background-color:var(--color-primary-600);color:#fff;border-bottom-right-radius:.25rem}.message-ai{align-self:flex-start;background-color:var(--bg-body);color:var(--text-primary);border-bottom-left-radius:.25rem;border:1px solid var(--border-color)}.input-area{padding:1.5rem;background:linear-gradient(to top,var(--bg-surface) 80%,transparent);position:relative;z-index:10}.floating-input{background-color:var(--bg-surface);border:1px solid var(--border-color);box-shadow:var(--shadow-lg);border-radius:1.5rem;padding:.75rem 1rem;display:flex;gap:.75rem;align-items:flex-end;transition:border-color .2s,box-shadow .2s}.floating-input:focus-within{border-color:var(--border-focus);box-shadow:0 0 0 2px var(--color-primary-100)}[data-theme=dark] .floating-input:focus-within{box-shadow:0 0 0 2px #6366f133}.floating-input textarea{border:none;background:transparent;resize:none;flex:1;padding:.5rem;font-family:inherit;font-size:1rem;color:var(--text-primary);outline:none;max-height:200px;line-height:1.5}.upload-zone{border:2px dashed var(--border-color);border-radius:var(--radius-lg);padding:3rem 2rem;text-align:center;transition:all .2s;background-color:var(--bg-body);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem}.upload-zone:hover,.upload-zone.active{border-color:var(--color-primary-500);background-color:var(--color-primary-50)}[data-theme=dark] .upload-zone:hover,[data-theme=dark] .upload-zone.active{background-color:#6366f11a}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.card-hover{transition:transform .2s,box-shadow .2s}.card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-slate-300);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-slate-400)}[data-theme=dark] ::-webkit-scrollbar-thumb{background:var(--color-slate-700)}[data-theme=dark] ::-webkit-scrollbar-thumb:hover{background:var(--color-slate-600)}@media(max-width:768px){.chat-layout{flex-direction:column;height:calc(100vh - 120px)}.chat-sidebar{width:100%;height:auto;max-height:150px;flex-shrink:0;overflow-y:auto}.chat-main{flex:1;height:auto}.flex-between{flex-wrap:wrap;gap:1rem}.btn{width:100%;justify-content:center}.flex-gap-sm .btn{width:auto}h1{font-size:1.5rem}}@media(max-width:640px){.container{padding:0 1rem}.grid-responsive{grid-template-columns:1fr}.modal-content{max-width:95%;margin:1rem}}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1}.footer{padding:var(--spacing-xl) 0;border-top:1px solid var(--border-color);background:var(--bg-secondary);text-align:center}.footer p{margin:0}