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var(--transition-fast);position:relative;z-index:1;-webkit-tap-highlight-color:transparent;touch-action:manipulation;-webkit-user-select:none;user-select:none}.new-chat-button:hover{background:var(--color-primary);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}.new-chat-button:active{transform:translateY(0)}.upload-area{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-6);border:2px dashed var(--color-gray-300);border-radius:var(--radius-lg);background:var(--color-gray-50);text-align:center;transition:all var(--transition-fast);cursor:pointer}.upload-area:hover,.upload-area-active{border-color:var(--color-primary);background:rgba(37,99,235,.05)}.upload-area svg{color:var(--color-gray-400);margin-bottom:var(--space-3)}.upload-area-active svg{color:var(--color-primary)}.upload-text{font-size:var(--font-size-sm);color:var(--color-gray-600);margin:0 0 var(--space-2) 0}.upload-link{color:var(--color-primary);font-weight:var(--font-weight-medium);cursor:pointer;text-decoration:underline}.upload-link:hover{color:var(--color-primary-dark)}.upload-hint{font-size:var(--font-size-xs);color:var(--color-gray-400);margin:0}.documents-list{max-height:300px;overflow-y:auto}.document-items{display:flex;flex-direction:column;gap:var(--space-2)}.document-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3);background:rgba(180,206,179,.1);border:1px solid var(--color-gray-700);border-radius:var(--radius-md);transition:all var(--transition-fast);cursor:pointer}.document-item:hover{background:rgba(180,206,179,.2);border-color:var(--color-primary);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.document-icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--color-secondary);color:#fff;border-radius:var(--radius-md);flex-shrink:0}.document-info{flex:1;min-width:0}.document-name{font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-primary-light);margin:0 0 var(--space-1) 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.document-meta{display:flex;align-items:center;gap:var(--space-2);font-size:var(--font-size-xs);color:var(--color-gray-400)}.document-delete{display:flex;align-items:center;justify-content:center;width:24px;height:24px;border:none;background:transparent;color:var(--color-gray-400);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);flex-shrink:0;opacity:0}.document-item:hover .document-delete{opacity:1}.document-delete:hover{background:var(--color-error);color:#fff}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-8) var(--space-4);text-align:center}.empty-state svg{color:var(--color-gray-400);margin-bottom:var(--space-3)}.empty-state p{font-size:var(--font-size-sm);color:var(--color-gray-400);margin:0}.chat-history{flex:1;overflow-y:auto;scrollbar-width:none;-ms-overflow-style:none}.chat-history::-webkit-scrollbar{display:none}.chat-items{display:flex;flex-direction:column;gap:var(--space-2)}.chat-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3);background:rgba(180,206,179,.1);border:1px solid var(--color-gray-700);border-radius:var(--radius-md);transition:all var(--transition-fast);cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation;position:relative;z-index:0}.chat-item:hover{background:rgba(180,206,179,.2);border-color:var(--color-primary);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.chat-item.active{background:rgba(180,206,179,.3);border-color:var(--color-primary);box-shadow:var(--shadow-sm)}.chat-icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--color-secondary);color:#fff;border-radius:var(--radius-md);flex-shrink:0}.chat-info{flex:1;min-width:0}.chat-title{font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-primary-light);margin:0 0 var(--space-1) 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-meta{display:flex;align-items:center;gap:var(--space-2);font-size:var(--font-size-xs);color:var(--color-gray-400)}.chat-delete{display:flex;align-items:center;justify-content:center;width:24px;height:24px;border:none;background:transparent;color:#fff;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);flex-shrink:0;opacity:.7}.chat-delete:hover{background:var(--color-error);color:#fff;opacity:1}@media (max-width: 768px){.sidebar{width:280px}.sidebar-content{padding:var(--space-3)}.upload-area{padding:var(--space-4)}}.app{display:flex;height:100vh;height:100dvh;min-height:-webkit-fill-available;background:linear-gradient(135deg,var(--color-gray-50) 0%,var(--color-gray-100) 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transparent}.document-sidebar-content::-webkit-scrollbar{width:6px}.document-sidebar-content::-webkit-scrollbar-track{background:transparent}.document-sidebar-content::-webkit-scrollbar-thumb{background:rgba(0,0,0,.2);border-radius:3px}.sidebar-document-card{background:rgba(255,255,255,.9);border:1px solid rgba(255,255,255,.3);border-radius:.75rem;padding:1rem;margin-bottom:.75rem;display:flex;align-items:center;justify-content:space-between;gap:.75rem;transition:all .2s ease;box-shadow:0 2px 4px -1px #0000000f}.sidebar-document-card:hover{box-shadow:0 4px 6px -1px #0000001a;border-color:#6366f14d}.sidebar-document-info{display:flex;align-items:center;gap:.75rem;flex:1;min-width:0}.sidebar-document-info .file-icon{color:#dc2626;flex-shrink:0}.sidebar-document-details{flex:1;min-width:0}.sidebar-document-name{font-size:.875rem;font-weight:600;color:var(--color-text-primary);margin:0 0 .25rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-document-size{font-size:.75rem;color:var(--color-text-tertiary);margin:0}.sidebar-delete-button{display:flex;align-items:center;justify-content:center;width:2rem;height:2rem;border:none;background:rgba(239,68,68,.1);border-radius:.375rem;color:#ef4444;cursor:pointer;transition:all .2s ease;flex-shrink:0}.sidebar-delete-button:hover{background:rgba(239,68,68,.2);color:#dc2626}.sidebar-empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem 1rem;text-align:center;color:var(--color-text-secondary)}.sidebar-empty-state .empty-icon{color:var(--color-text-tertiary);margin-bottom:1rem;opacity:.6}.sidebar-empty-state p{font-size:.875rem;margin:0}.mobile-menu-toggle{display:none}@media (max-width: 768px){.app{flex-direction:row;position:relative}.mobile-menu-toggle{display:flex;align-items:center;justify-content:center;position:fixed;top:1rem;left:1rem;z-index:101;width:48px;height:48px;border:none;background:var(--color-primary);color:#fff;border-radius:var(--radius-lg);cursor:pointer;box-shadow:var(--shadow-lg);-webkit-tap-highlight-color:transparent;touch-action:manipulation}.mobile-menu-toggle:active{transform:scale(.95)}.sidebar{position:absolute;left:-100%;transition:left .3s ease;z-index:100;height:100vh;box-shadow:2px 0 8px #0000004d}.sidebar.mobile-visible{left:0}.main-content{width:100%;flex:1}}.main-content{transition:margin-left var(--transition-normal)}.app:focus-within{outline:none}.loading-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(255,255,255,.8);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000}.loading-spinner{width:32px;height:32px;border:3px solid 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#e6b751;--color-accent-light: #f2d084;--color-accent-dark: #d49e2a;--color-gray-50: #f8faf9;--color-gray-100: #f1f5f3;--color-gray-200: #e2ebe6;--color-gray-300: #c8d6cc;--color-gray-400: #9bb0a1;--color-gray-500: #6d8574;--color-gray-600: #4a5d50;--color-gray-700: #2d3a32;--color-gray-800: #192839;--color-gray-900: #013220;--color-success: #165540;--color-warning: #e6b751;--color-error: #dc2626;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--font-weight-light: 300;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--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;--space-16: 4rem;--space-20: 5rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-2xl: 1.5rem;--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);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .3s cubic-bezier(.4, 0, .2, 1);--transition-slow: .5s cubic-bezier(.4, 0, .2, 1)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.focus-ring{outline:2px solid transparent;outline-offset:2px}.focus-ring:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--color-gray-100)}::-webkit-scrollbar-thumb{background:var(--color-gray-300);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--color-gray-400)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.animate-fade-in{animation:fadeIn var(--transition-normal) ease-out}.animate-slide-in{animation:slideIn var(--transition-normal) ease-out}.animate-pulse{animation:pulse 2s cubic-bezier(.4,0,.6,1) infinite}