:root{--primary-color: #2563eb;--primary-hover: #1d4ed8;--secondary-color: #64748b;--success-color: #059669;--warning-color: #d97706;--error-color: #dc2626;--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-tertiary: #f1f5f9;--bg-dark: #1e293b;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--text-inverse: #ffffff;--border-light: #e2e8f0;--border-medium: #cbd5e1;--border-dark: #94a3b8;--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);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--font-family: "Inter", system-ui, -apple-system, sans-serif;--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;--radius-sm: .25rem;--radius-md: .375rem;--radius-lg: .5rem;--radius-xl: .75rem;--transition-fast: .15s ease-in-out;--transition-normal: .25s ease-in-out;--transition-slow: .35s ease-in-out}@media (prefers-color-scheme: dark){:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--bg-dark: #020617;--text-primary: #f8fafc;--text-secondary: #cbd5e1;--text-muted: #64748b;--text-inverse: #0f172a;--border-light: #334155;--border-medium: #475569;--border-dark: #64748b}}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;line-height:1.5}body{font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;overflow-x:hidden}#app{min-height:100vh;width:100%}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.25;margin-bottom:var(--spacing-md)}h1{font-size:var(--font-size-3xl)}h2{font-size:var(--font-size-2xl)}h3{font-size:var(--font-size-xl)}h4{font-size:var(--font-size-lg)}p{margin-bottom:var(--spacing-md);line-height:1.6}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-sm);font-weight:500;border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);text-decoration:none;white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background-color:var(--primary-color);color:var(--text-inverse)}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover)}.btn-secondary{background-color:var(--bg-secondary);color:var(--text-primary);border-color:var(--border-medium)}.btn-secondary:hover:not(:disabled){background-color:var(--bg-tertiary)}.btn-outline{background-color:transparent;color:var(--primary-color);border-color:var(--primary-color)}.btn-outline:hover:not(:disabled){background-color:var(--primary-color);color:var(--text-inverse)}.btn-danger{background-color:var(--error-color);color:var(--text-inverse)}.btn-danger:hover:not(:disabled){background-color:#b91c1c}.btn-sm{padding:var(--spacing-xs) var(--spacing-sm);font-size:var(--font-size-xs)}.form-control{width:100%;padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-sm);border:1px solid var(--border-medium);border-radius:var(--radius-md);background-color:var(--bg-primary);color:var(--text-primary);transition:border-color var(--transition-fast)}.form-control:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #2563eb1a}.form-group{margin-bottom:var(--spacing-lg)}.form-group label{display:block;margin-bottom:var(--spacing-sm);font-weight:500;color:var(--text-primary)}.input-group{display:flex;gap:var(--spacing-sm)}.input-group .form-control{flex:1}.app-layout{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(180deg,var(--bg-secondary) 0%,var(--bg-primary) 45%)}.navigation-ribbon{position:sticky;top:0;z-index:100;width:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-xl);padding:var(--spacing-md) var(--spacing-xl);background-color:var(--bg-primary);border-bottom:1px solid var(--border-light);box-shadow:var(--shadow-sm)}.nav-section{display:flex;align-items:center;gap:var(--spacing-md);flex-wrap:wrap}.nav-section.nav-section--brand{flex-direction:column;align-items:flex-start;gap:var(--spacing-xs)}.nav-section.nav-section--links,.nav-section.nav-section--actions{justify-content:center}.app-title{color:var(--text-primary);font-size:var(--font-size-2xl);margin:0;font-weight:700}.project-name-display{color:var(--text-secondary);font-size:var(--font-size-sm)}.nav-button{display:inline-flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);border:1px solid transparent;background:transparent;color:var(--text-secondary);font-size:var(--font-size-sm);font-weight:500;cursor:pointer;transition:all 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var(--border-light);border-radius:var(--radius-xl);padding:var(--spacing-lg);box-shadow:var(--shadow-sm)}.surface-card+.surface-card{margin-top:var(--spacing-md)}.card-heading{display:flex;flex-direction:column;gap:var(--spacing-xs);margin-bottom:var(--spacing-md)}.card-heading h3{margin:0;color:var(--text-primary)}.subtitle{color:var(--text-secondary);font-size:var(--font-size-sm);margin:0}.scoping-columns{display:grid;grid-template-columns:1fr;gap:var(--spacing-xl);align-items:flex-start}.scoping-column{display:flex;flex-direction:column;gap:var(--spacing-lg)}.project-toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--spacing-lg)}.project-toolbar .project-selector{display:flex;align-items:center;flex-wrap:wrap;gap:var(--spacing-sm)}.project-toolbar label{text-transform:uppercase;font-size:var(--font-size-xs);letter-spacing:.12em;font-weight:600;color:var(--text-secondary)}.project-toolbar select{min-width:220px;max-width:280px}.project-toolbar__actions{display:flex;align-items:center;gap:var(--spacing-sm)}.project-toolbar__actions .btn{min-width:120px;justify-content:center}.project-files-card .btn{align-self:flex-start}.project-files-card .uploaded-files-list{margin-top:var(--spacing-md);max-height:260px;overflow-y:auto;display:flex;flex-direction:column;gap:var(--spacing-sm)}.uploaded-file-item{display:flex;justify-content:space-between;align-items:center;gap:var(--spacing-md);padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--border-light);border-radius:var(--radius-md);background:var(--bg-secondary);transition:all var(--transition-fast)}.uploaded-file-item:hover{border-color:var(--primary-color);box-shadow:var(--shadow-sm)}.file-info{display:flex;flex-direction:column;gap:2px}.file-name{font-weight:600;color:var(--text-primary)}.file-meta{display:flex;gap:var(--spacing-sm);font-size:var(--font-size-xs);color:var(--text-muted)}.no-files{text-align:center;color:var(--text-secondary);font-style:italic;padding:var(--spacing-md);border:1px dashed var(--border-light);border-radius:var(--radius-md);background:var(--bg-secondary)}.knowledge-card{display:flex;flex-direction:column;gap:var(--spacing-md)}.used-chunks-info,.knowledge-card .card-actions{display:flex;flex-direction:column;gap:var(--spacing-sm)}.knowledge-card .btn{justify-content:center}.no-chunks{text-align:center;color:var(--text-secondary);font-style:italic;padding:var(--spacing-md);border:1px dashed var(--border-light);border-radius:var(--radius-md);background:var(--bg-secondary)}.download-chunk-usage-btn,.refresh-knowledge-btn{width:100%}.chat-card{display:flex;flex-direction:column;gap:var(--spacing-lg)}.chat-card__header{display:flex;flex-direction:column;gap:var(--spacing-xs)}.chat-messages{display:flex;flex-direction:column;gap:var(--spacing-md);max-height:460px;overflow-y:auto;padding-right:var(--spacing-sm)}.message{display:flex;flex-direction:column;gap:var(--spacing-xs);align-items:stretch}.message.user,.message.assistant{align-items:stretch}.message-content{width:100%;box-sizing:border-box;padding:var(--spacing-md);border-radius:var(--radius-lg);word-wrap:break-word;background-color:var(--bg-secondary);color:var(--text-primary);box-shadow:var(--shadow-sm)}.message-content table{width:100%;border-collapse:collapse;margin:var(--spacing-sm) 0}.message-content th,.message-content td{border:1px solid var(--border-light);padding:8px 10px;text-align:left;font-size:var(--font-size-sm)}.message-content th{background:var(--bg-tertiary);color:var(--text-primary)}.message-content ul,.message-content ol{padding-left:1.25rem;margin:var(--spacing-sm) 0}.message-content li{margin:2px 0}.message-content .llm-interactive{width:100%;display:block}.message-content .llm-interactive input[type=text],.message-content .llm-interactive input[type=number],.message-content .llm-interactive select,.message-content .llm-interactive textarea{width:100%;max-width:100%}.message.user .message-content{background-color:var(--primary-color);color:var(--text-inverse);border-bottom-right-radius:var(--radius-sm)}.message.assistant .message-content{border-bottom-left-radius:var(--radius-sm)}.message-time{font-size:var(--font-size-xs);color:var(--text-muted)}.chat-footer{display:flex;flex-direction:column;gap:var(--spacing-sm);border-top:1px solid var(--border-light);padding-top:var(--spacing-md)}.knowledge-toggle{display:flex;align-items:center;gap:var(--spacing-sm);font-size:var(--font-size-sm);color:var(--text-secondary)}.chat-input-stack{display:flex;flex-direction:column;gap:var(--spacing-sm)}.chat-input-stack textarea{width:100%;min-height:120px;max-height:220px;resize:vertical;padding:var(--spacing-md);border:1px solid var(--border-medium);border-radius:var(--radius-md);font-family:inherit;font-size:var(--font-size-base);background-color:var(--bg-primary);color:var(--text-primary)}.chat-input-stack textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #2563eb1a}.chat-actions{display:flex;justify-content:flex-end;gap:var(--spacing-sm)}.chat-actions .btn{min-width:140px}.typing-indicator .message-content{background-color:var(--bg-secondary);padding:var(--spacing-md)}.typing-dots{display:flex;gap:var(--spacing-xs)}.typing-dots 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var(--border-light);overflow:hidden}.context-result+.context-result{margin-top:var(--spacing-md)}.context-result.active-context{border-color:var(--primary-color);box-shadow:0 0 0 2px #2563eb26}.context-header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md);background-color:var(--bg-tertiary);border-bottom:1px solid var(--border-light)}.context-header h4{margin:0;color:var(--text-primary)}.context-content{padding:var(--spacing-lg)}.context-content pre{white-space:pre-wrap;word-wrap:break-word;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:var(--font-size-sm);line-height:1.6;color:var(--text-primary);margin:0}.knowledge-actions{margin-bottom:var(--spacing-xl);text-align:center}.sources-list{display:grid;gap:var(--spacing-lg)}.source-card{background-color:var(--bg-secondary);border-radius:var(--radius-lg);padding:var(--spacing-lg);border:1px solid var(--border-light);transition:all var(--transition-fast)}.source-card:hover{box-shadow:var(--shadow-md)}.source-card.disabled{opacity:.6}.source-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-md)}.source-name{font-size:var(--font-size-lg);font-weight:600;color:var(--text-primary);margin:0}.source-actions{display:flex;gap:var(--spacing-sm)}.source-details{display:flex;flex-direction:column;gap:var(--spacing-sm)}.source-filename,.source-date{font-size:var(--font-size-sm);color:var(--text-secondary);margin:0}.source-status{display:flex;align-items:center;gap:var(--spacing-xs);font-size:var(--font-size-sm);font-weight:500}.source-status.active{color:var(--success-color)}.source-status.inactive{color:var(--text-muted)}.status-icon{width:8px;height:8px;border-radius:50%;background-color:currentColor}.settings-form{max-width:600px;margin:0 auto}.form-actions{text-align:center;margin-top:var(--spacing-xl)}.provider-options{margin-top:var(--spacing-lg)}.prompt-editor{max-width:800px;margin:0 auto}.prompt-selector{margin-bottom:var(--spacing-xl)}.prompt-content{background-color:var(--bg-secondary);border-radius:var(--radius-lg);padding:var(--spacing-lg)}.editor-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-lg)}.editor-header h3{margin:0;color:var(--text-primary);flex:1}.prompt-status{display:flex;align-items:center;margin:0 var(--spacing-md)}.status-indicator{padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);font-size:var(--font-size-xs);font-weight:500;border:1px solid}.status-indicator.default{background-color:#e3f2fd;color:#1976d2;border-color:#bbdefb}.status-indicator.custom{background-color:#fff3e0;color:#f57c00;border-color:#ffcc02}.status-indicator.error{background-color:#ffebee;color:#d32f2f;border-color:#ffcdd2}.editor-actions{display:flex;gap:var(--spacing-sm)}.prompt-textarea{width:100%;min-height:400px;padding:var(--spacing-lg);border:1px solid var(--border-medium);border-radius:var(--radius-md);font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:var(--font-size-sm);line-height:1.6;background-color:var(--bg-primary);color:var(--text-primary);resize:vertical}.prompt-textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #2563eb1a}.notifications-container{position:fixed;top:var(--spacing-lg);right:var(--spacing-lg);z-index:1000;display:flex;flex-direction:column;gap:var(--spacing-sm);max-width:400px}.notification{background-color:var(--bg-primary);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);border-left:4px solid;overflow:hidden;animation:slideIn .3s ease-out}.notification.success{border-left-color:var(--success-color)}.notification.error{border-left-color:var(--error-color)}.notification.warning{border-left-color:var(--warning-color)}.notification-content{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md)}.notification-icon{width:20px;height:20px;flex-shrink:0}.notification-message{flex:1;font-size:var(--font-size-sm);color:var(--text-primary)}.notification-close{background:none;border:none;font-size:var(--font-size-lg);color:var(--text-muted);cursor:pointer;padding:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center}.notification-close:hover{color:var(--text-primary)}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.modal-container{position:fixed;inset:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--spacing-lg)}.modal-container.hidden{display:none}.modal{background-color:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);max-width:500px;width:100%;max-height:90vh;overflow-y:auto}.modal-header{padding:var(--spacing-lg);border-bottom:1px solid var(--border-light)}.modal-header h3{margin:0;color:var(--text-primary)}.modal-body{padding:var(--spacing-lg)}.modal-footer{padding:var(--spacing-lg);border-top:1px solid var(--border-light);display:flex;justify-content:flex-end;gap:var(--spacing-sm)}.empty-state{text-align:center;padding:var(--spacing-2xl);color:var(--text-muted)}.empty-state h3{color:var(--text-secondary);margin-bottom:var(--spacing-md)}.coming-soon{text-align:center;padding:var(--spacing-2xl);color:var(--text-muted)}.coming-soon h2{color:var(--text-secondary);margin-bottom:var(--spacing-md)}.error-container{text-align:center;padding:var(--spacing-2xl);color:var(--error-color)}.error-container h1{color:var(--error-color);margin-bottom:var(--spacing-lg)}.error-details{font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:var(--font-size-sm);background-color:var(--bg-secondary);padding:var(--spacing-md);border-radius:var(--radius-md);margin-top:var(--spacing-lg);color:var(--text-primary)}.icon-scoping:before{content:"📋"}.icon-design:before{content:"📐"}.icon-drawing:before{content:"📏"}.icon-estimation:before{content:"💰"}.icon-knowledge:before{content:"📚"}.icon-llm:before{content:"🤖"}.icon-prompts:before{content:"⚙️"}.icon-upload:before{content:"📤"}.icon-download:before{content:"↓"}.icon-refresh:before{content:"🔄"}.icon-send:before{content:"📤"}.icon-copy:before{content:"📋"}.icon-loading:before{content:"⏳"}.icon-success:before{content:"✅"}.icon-error:before{content:"❌"}.icon-warning:before{content:"⚠️"}@media (max-width: 1024px){.scoping-columns{grid-template-columns:1fr}}@media (max-width: 768px){.navigation-ribbon{flex-direction:column;align-items:flex-start;gap:var(--spacing-md)}.nav-section{width:100%;justify-content:flex-start}.project-toolbar{align-items:flex-start}.project-toolbar__actions{width:100%;justify-content:flex-start;flex-wrap:wrap}.scoping-columns{grid-template-columns:1fr}.context-buttons .btn{flex:1 1 100%}}@media (max-width: 480px){.nav-button{padding:var(--spacing-xs) var(--spacing-sm)}.nav-button span{display:none}#module-content{padding:var(--spacing-xl) var(--spacing-md)}}.loading-spinner{display:inline-block;width:16px;height:16px;border:2px solid var(--border-light);border-radius:50%;border-top-color:var(--primary-color);animation:spin 1s ease-in-out infinite}.loading-spinner-small{width:12px;height:12px;border-width:1px}.loading-spinner-medium{width:20px;height:20px;border-width:2px}.loading-spinner-large{width:32px;height:32px;border-width:3px}@keyframes spin{to{transform:rotate(360deg)}}.loading{position:relative;pointer-events:none}.loading:after{content:"";position:absolute;inset:0;background-color:#fffc;display:flex;align-items:center;justify-content:center;border-radius:inherit}.progress-container{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background-color:var(--bg-primary);padding:var(--spacing-lg);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);z-index:1001;min-width:300px}.progress-bar{width:100%;height:8px;background-color:var(--bg-tertiary);border-radius:var(--radius-sm);overflow:hidden;margin-bottom:var(--spacing-md)}.progress-fill{height:100%;background-color:var(--primary-color);transition:width .3s ease;border-radius:var(--radius-sm)}.progress-text{text-align:center;font-size:var(--font-size-sm);color:var(--text-secondary)}#global-loading-indicator{position:fixed;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,transparent,var(--primary-color),transparent);z-index:1002;animation:loading-bar 2s ease-in-out infinite}@keyframes loading-bar{0%{transform:translate(-100%)}to{transform:translate(100%)}}.btn.loading{position:relative;color:transparent}.btn.loading .loading-spinner{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);border-top-color:currentColor;border-right-color:transparent;border-bottom-color:transparent;border-left-color:transparent}.skeleton{background:linear-gradient(90deg,var(--bg-secondary) 25%,var(--bg-tertiary) 50%,var(--bg-secondary) 75%);background-size:200% 100%;animation:skeleton-loading 1.5s infinite}@keyframes skeleton-loading{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-text{height:1em;margin-bottom:var(--spacing-sm);border-radius:var(--radius-sm)}.skeleton-text:last-child{width:60%}.pulse{animation:pulse 2s cubic-bezier(.4,0,.6,1) infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.fade-in{animation:fadeIn .3s ease-in-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.slide-in{animation:slideInFromTop .3s ease-out}@keyframes slideInFromTop{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.transparency-section{background:#f8f9fa;border:1px solid #e9ecef;border-radius:8px;padding:20px;margin-top:20px}.transparency-section h3{color:#495057;margin-bottom:15px;font-size:1.1rem;font-weight:600}.chunk-usage-controls{display:flex;gap:10px;margin-bottom:15px;align-items:center}.download-chunk-usage-btn{background:#28a745;color:#fff;border:none;padding:8px 16px;border-radius:4px;cursor:pointer;font-size:.9rem;transition:background-color .2s}.download-chunk-usage-btn:hover:not(:disabled){background:#218838}.download-chunk-usage-btn:disabled,.refresh-knowledge-btn:disabled{background:#64748b2e;color:var(--text-secondary);border-color:#94a3b866;cursor:not-allowed}.chunks-summary{border:1px solid var(--border-light);border-radius:var(--radius-lg);background:var(--bg-secondary);padding:var(--spacing-md);display:flex;flex-direction:column;gap:var(--spacing-md)}.chunks-summary h4{margin:0;font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.08em;color:var(--text-secondary)}.chunk-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:var(--spacing-sm)}.chunk-item{border:1px solid var(--border-light);border-radius:var(--radius-md);background:var(--bg-primary);padding:var(--spacing-sm) var(--spacing-md);display:flex;flex-direction:column;gap:var(--spacing-xs);box-shadow:var(--shadow-sm)}.chunk-item-header{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-sm)}.chunk-summary{font-size:var(--font-size-sm);color:var(--text-secondary);margin:0}.relevance-score{font-size:var(--font-size-xs);color:var(--primary-color);background:#2563eb1f;border-radius:999px;padding:2px var(--spacing-sm)}@media (max-width: 768px){.chunk-usage-controls{flex-direction:column;align-items:stretch}.relevance-score{position:static;display:inline-block;margin-left:10px}}.uploaded-files-section{margin-bottom:var(--spacing-md);padding:var(--spacing-md);background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:8px}.uploaded-files-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-sm)}.uploaded-files-header h4{margin:0;font-size:var(--font-size-base);font-weight:600;color:var(--text-primary)}.uploaded-files-list{max-height:200px;overflow-y:auto}.uploaded-file-item{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-sm);margin-bottom:var(--spacing-xs);background:var(--bg-primary);border:1px solid var(--border-light);border-radius:6px;transition:all .2s ease}.uploaded-file-item:hover{border-color:var(--border-medium);box-shadow:var(--shadow-sm)}.file-info{display:flex;flex-direction:column;flex:1}.file-name{font-weight:500;color:var(--text-primary);font-size:var(--font-size-sm)}.file-size,.file-date{font-size:var(--font-size-xs);color:var(--text-muted);margin-top:2px}.remove-file-btn{padding:var(--spacing-xs);min-width:auto;width:28px;height:28px;display:flex;align-items:center;justify-content:center}.no-files{text-align:center;color:var(--text-muted);font-style:italic;margin:var(--spacing-md) 0}.chat-options{margin-bottom:var(--spacing-md);padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-tertiary);border-radius:6px}.checkbox-label{display:flex;align-items:center;cursor:pointer;font-size:var(--font-size-sm);color:var(--text-primary);-webkit-user-select:none;user-select:none}.checkbox-label input[type=checkbox]{margin-right:var(--spacing-sm);transform:scale(1.1)}.checkbox-label input[type=checkbox]:disabled{opacity:.5;cursor:not-allowed}.checkbox-label:has(input[type=checkbox]:disabled){opacity:.5;cursor:not-allowed}.btn-sm{padding:var(--spacing-xs) var(--spacing-sm);font-size:var(--font-size-xs);line-height:1.4}.btn-secondary{background-color:var(--secondary-color);color:var(--text-inverse);border:1px solid var(--secondary-color)}.btn-secondary:hover:not(:disabled){background-color:#475569;border-color:#475569}.btn-danger{background-color:var(--error-color);color:var(--text-inverse);border:1px solid var(--error-color)}.btn-danger:hover:not(:disabled){background-color:#b91c1c;border-color:#b91c1c}.icon-upload:before{content:"📁"}.icon-delete:before{content:"🗑️"}@media (max-width: 768px){.uploaded-files-header,.uploaded-file-item{flex-direction:column;align-items:stretch;gap:var(--spacing-sm)}.file-info{text-align:center}.remove-file-btn{align-self:center}}.uploaded-file-item{display:flex;justify-content:space-between;align-items:center;gap:12px}.uploaded-file-item .file-info{flex:1 1 auto}.file-actions{display:flex;align-items:center;gap:8px}.file-toggle{display:flex;align-items:center;gap:4px;font-size:.85rem}.file-toggle-text{font-size:.8rem;color:var(--text-secondary, #555)}.uploaded-file-item.file-disabled .file-name{opacity:.6}.uploaded-file-item.file-disabled .file-toggle-text{color:var(--danger-color, #c0392b)}