@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--color-primary: #2F4F6B;--color-primary-hover: #264159;--color-primary-light: #3d6585;--color-secondary: #46739B;--color-secondary-hover: #3a6185;--color-accent: #4A5BFF;--color-accent-hover: #3a4be6;--color-accent-light: rgba(74, 91, 255, .1);--color-bg: #F4F6F8;--color-surface: #FFFFFF;--color-surface-hover: #f0f2f5;--color-surface-active: #e8ebef;--color-text: #1A1A2E;--color-text-secondary: #6B7280;--color-text-tertiary: #9CA3AF;--color-text-inverse: #FFFFFF;--color-border: #E5E7EB;--color-border-light: #F0F1F3;--color-divider: #E5E7EB;--color-success: #10B981;--color-success-bg: rgba(16, 185, 129, .1);--color-warning: #F59E0B;--color-warning-bg: rgba(245, 158, 11, .1);--color-error: #EF4444;--color-error-bg: rgba(239, 68, 68, .1);--color-info: #3B82F6;--color-info-bg: rgba(59, 130, 246, .1);--sidebar-width: 280px;--sidebar-bg: var(--color-primary);--sidebar-text: rgba(255, 255, 255, .9);--sidebar-text-dim: rgba(255, 255, 255, .55);--sidebar-hover: rgba(255, 255, 255, .08);--sidebar-active: rgba(255, 255, 255, .14);--sidebar-border: rgba(255, 255, 255, .1);--topbar-height: 56px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", "Consolas", monospace;--text-xs: .75rem;--text-sm: .8125rem;--text-base: .875rem;--text-md: .9375rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--radius-xs: 4px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-xl: 20px;--radius-full: 9999px;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .04);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .1);--shadow-xl: 0 16px 48px rgba(0, 0, 0, .12);--transition-fast: .12s ease;--transition: .2s ease;--transition-slow: .3s ease;--transition-spring: .3s cubic-bezier(.34, 1.56, .64, 1)}.dark{--color-primary: #1C2733;--color-primary-hover: #151e27;--color-primary-light: #28394a;--color-secondary: #2C435A;--color-secondary-hover: #223447;--color-accent: #6C7AFB;--color-accent-hover: #818dfc;--color-accent-light: rgba(108, 122, 251, .15);--color-bg: #111827;--color-surface: #1F2937;--color-surface-hover: #374151;--color-surface-active: #4B5563;--color-text: #F9FAFB;--color-text-secondary: #D1D5DB;--color-text-tertiary: #9CA3AF;--color-text-inverse: #111827;--color-border: #374151;--color-border-light: #4B5563;--color-divider: #374151;--sidebar-bg: #16202A;--sidebar-border: rgba(255, 255, 255, .05)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:var(--font-sans);font-size:var(--text-base);color:var(--color-text);background-color:var(--color-bg);line-height:1.6;overflow:hidden;height:100vh}a{color:var(--color-accent);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;cursor:pointer;border:none;background:none;font-size:inherit}input,textarea,select{font-family:inherit;font-size:inherit}.login-container{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--color-bg);padding:var(--space-4)}.login-loading{font-size:var(--text-lg);color:var(--color-text-secondary);animation:pulse 1.5s infinite}@keyframes pulse{0%{opacity:.6}50%{opacity:1}to{opacity:.6}}.login-card{background:var(--color-surface);border-radius:var(--radius-xl);padding:var(--space-10) var(--space-8);width:100%;max-width:440px;box-shadow:var(--shadow-xl);text-align:center}.login-logo{display:flex;align-items:center;justify-content:center;width:80px;height:80px;background:var(--color-primary);color:#fff;border-radius:var(--radius-xl);margin:0 auto var(--space-6);box-shadow:var(--shadow-md)}.login-title{font-size:var(--text-2xl);color:var(--color-primary);margin-bottom:var(--space-2);font-weight:700;letter-spacing:-.5px}.login-subtitle{color:var(--color-text-secondary);font-size:var(--text-md);margin-bottom:var(--space-8)}.login-features{text-align:left;margin-bottom:var(--space-10);background:var(--color-bg);padding:var(--space-5);border-radius:var(--radius-md)}.login-feature{margin-bottom:var(--space-3);color:var(--color-text);font-weight:500;display:flex;align-items:center;gap:var(--space-3)}.login-feature:last-child{margin-bottom:0}.login-google-btn{display:flex;align-items:center;justify-content:center;gap:var(--space-3);width:100%;padding:var(--space-3);background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text);font-weight:600;font-size:var(--text-md);transition:var(--transition);box-shadow:var(--shadow-sm)}.login-google-btn:hover{background:var(--color-surface-hover);border-color:#d1d5db;transform:translateY(-1px);box-shadow:var(--shadow-md)}.login-google-btn:active{transform:translateY(0)}.login-google-icon{width:24px;height:24px}.login-footer{margin-top:var(--space-6);font-size:var(--text-xs);color:var(--color-text-tertiary);line-height:1.5}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#00000026;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#00000040}.app-layout{display:flex;height:100vh;width:100vw;overflow:hidden}.app-main{flex:1;display:flex;flex-direction:column;min-width:0;height:100vh;background:var(--color-bg)}.app-content{flex:1;display:flex;flex-direction:column;overflow:hidden}.sidebar{width:var(--sidebar-width);height:100vh;background:var(--sidebar-bg);display:flex;flex-direction:column;flex-shrink:0;transition:transform var(--transition-slow);z-index:100}.sidebar-header{padding:var(--space-5);display:flex;align-items:center;gap:var(--space-3)}.sidebar-logo{display:flex;align-items:center;gap:var(--space-3)}.sidebar-logo-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--color-accent),#7B68EE);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff;flex-shrink:0}.sidebar-logo-text{font-size:var(--text-lg);font-weight:700;color:var(--sidebar-text);letter-spacing:-.3px}.sidebar-new-chat{margin:0 var(--space-4) var(--space-3);padding:var(--space-3) var(--space-4);background:#ffffff1a;border:1px solid var(--sidebar-border);color:var(--sidebar-text);border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:500;display:flex;align-items:center;gap:var(--space-2);transition:all var(--transition);cursor:pointer}.sidebar-new-chat:hover{background:#ffffff29;transform:translateY(-1px)}.sidebar-new-chat svg{width:16px;height:16px;opacity:.8}.sidebar-section{flex:1;overflow-y:auto;padding:0 var(--space-3)}.sidebar-section-label{font-size:var(--text-xs);font-weight:600;color:var(--sidebar-text-dim);text-transform:uppercase;letter-spacing:.8px;padding:var(--space-4) var(--space-3) var(--space-2)}.sidebar-chat-item{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);color:var(--sidebar-text);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-fast);text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-chat-item:hover{background:var(--sidebar-hover);text-decoration:none}.sidebar-chat-item.active{background:var(--sidebar-active)}.sidebar-chat-item svg{width:16px;height:16px;flex-shrink:0;opacity:.6}.sidebar-chat-title{overflow:hidden;text-overflow:ellipsis;flex:1}.sidebar-chat-delete{display:flex;align-items:center;justify-content:center;padding:4px;background:transparent;color:var(--sidebar-text-dim);border-radius:var(--radius-xs);opacity:0;transition:all var(--transition-fast)}.sidebar-chat-item:hover .sidebar-chat-delete{opacity:1}.sidebar-chat-delete:hover{background:#ef444433;color:#ff8a8a}.sidebar-nav{padding:var(--space-3);border-top:1px solid var(--sidebar-border)}.sidebar-nav-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-3);border-radius:var(--radius-sm);color:var(--sidebar-text);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-fast);text-decoration:none;width:100%}.sidebar-nav-item:hover{background:var(--sidebar-hover);text-decoration:none}.sidebar-nav-item svg{width:18px;height:18px;opacity:.7}.topbar{height:var(--topbar-height);background:var(--color-surface);border-bottom:1px solid var(--color-border);display:flex;align-items:center;justify-content:space-between;padding:0 var(--space-6);flex-shrink:0}.topbar-left{display:flex;align-items:center;gap:var(--space-3)}.topbar-menu-btn{display:none;width:36px;height:36px;align-items:center;justify-content:center;border-radius:var(--radius-sm);color:var(--color-text-secondary);transition:all var(--transition-fast)}.topbar-menu-btn:hover{background:var(--color-surface-hover)}.topbar-title{font-size:var(--text-md);font-weight:600;color:var(--color-text)}.topbar-right{display:flex;align-items:center;gap:var(--space-3)}.topbar-model-select{padding:var(--space-2) var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-fast);outline:none}.topbar-model-select:hover{border-color:var(--color-secondary)}.topbar-model-select:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px var(--color-accent-light)}.topbar-avatar{width:34px;height:34px;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--color-secondary),var(--color-accent));display:flex;align-items:center;justify-content:center;color:#fff;font-size:var(--text-sm);font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.topbar-avatar:hover{transform:scale(1.05);box-shadow:var(--shadow-md)}.chat-container{flex:1;display:flex;flex-direction:column;overflow:hidden}.chat-messages{flex:1;overflow-y:auto;padding:var(--space-6) 0}.chat-messages-inner{max-width:800px;margin:0 auto;padding:0 var(--space-6)}.chat-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:var(--space-8)}.chat-empty-icon{width:64px;height:64px;background:linear-gradient(135deg,var(--color-accent),#7B68EE);border-radius:var(--radius-xl);display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:var(--space-5);animation:float 3s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.chat-empty h2{font-size:var(--text-2xl);font-weight:700;color:var(--color-text);margin-bottom:var(--space-2)}.chat-empty p{font-size:var(--text-md);color:var(--color-text-secondary);margin-bottom:var(--space-8);max-width:400px}.chat-suggestions{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-3);width:100%;max-width:560px}.chat-suggestion{padding:var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);text-align:left;cursor:pointer;transition:all var(--transition)}.chat-suggestion:hover{border-color:var(--color-accent);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.chat-suggestion-icon{font-size:20px;margin-bottom:var(--space-2)}.chat-suggestion-title{font-size:var(--text-sm);font-weight:600;color:var(--color-text);margin-bottom:var(--space-1)}.chat-suggestion-desc{font-size:var(--text-xs);color:var(--color-text-secondary);line-height:1.4}.message{display:flex;gap:var(--space-3);padding:var(--space-4) 0;animation:messageIn .3s ease}@keyframes messageIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message+.message{margin-top:var(--space-1)}.message-avatar{width:32px;height:32px;border-radius:var(--radius-full);flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:14px}.message-avatar.user{background:linear-gradient(135deg,var(--color-secondary),var(--color-primary));color:#fff}.message-avatar.assistant{background:linear-gradient(135deg,var(--color-accent),#7B68EE);color:#fff}.message-body{flex:1;min-width:0}.message-role{font-size:var(--text-xs);font-weight:600;color:var(--color-text-secondary);margin-bottom:var(--space-1);text-transform:capitalize}.message-content{font-size:var(--text-base);line-height:1.7;color:var(--color-text)}.message-content p+p{margin-top:var(--space-3)}.message-content code{background:var(--color-surface-hover);padding:2px 6px;border-radius:var(--radius-xs);font-family:var(--font-mono);font-size:.85em}.message-content pre{background:#1e1e2e;color:#cdd6f4;padding:var(--space-4);border-radius:var(--radius-md);overflow-x:auto;margin:var(--space-3) 0;font-family:var(--font-mono);font-size:var(--text-sm);line-height:1.5}.message-content table{width:100%;border-collapse:collapse;margin:var(--space-3) 0;font-size:var(--text-sm)}.message-content th,.message-content td{border:1px solid var(--color-border);padding:var(--space-2) var(--space-3);text-align:left}.message-content th{background-color:var(--color-surface-hover);font-weight:600}.message-content ul,.message-content ol{margin:var(--space-2) 0 var(--space-2) var(--space-5)}.message-content li{margin-bottom:var(--space-1)}.message-content blockquote{border-left:3px solid var(--color-accent);margin:var(--space-3) 0;padding-left:var(--space-3);color:var(--color-text-secondary);font-style:italic}.message-actions{display:flex;gap:var(--space-1);margin-top:var(--space-2);opacity:0;transition:opacity var(--transition-fast)}.message:hover .message-actions{opacity:1}.message-action-btn{padding:var(--space-1) var(--space-2);border-radius:var(--radius-xs);color:var(--color-text-tertiary);font-size:var(--text-xs);display:flex;align-items:center;gap:var(--space-1);transition:all var(--transition-fast)}.message-action-btn:hover{background:var(--color-surface-hover);color:var(--color-text-secondary)}.tool-result{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4);margin-top:var(--space-3)}.tool-result-header{display:flex;align-items:center;gap:var(--space-2);margin-bottom:var(--space-3);font-size:var(--text-sm);font-weight:600;color:var(--color-secondary)}.tool-result-content{font-size:var(--text-sm);line-height:1.6}.tool-result-actions{display:flex;gap:var(--space-2);margin-top:var(--space-3);padding-top:var(--space-3);border-top:1px solid var(--color-border-light)}.typing-indicator{display:flex;gap:4px;padding:var(--space-3) 0}.typing-dot{width:8px;height:8px;background:var(--color-text-tertiary);border-radius:50%;animation:typing 1.4s infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-6px);opacity:1}}.input-area{padding:var(--space-3) var(--space-6) var(--space-5);background:var(--color-bg)}.input-area-inner{max-width:800px;margin:0 auto}.input-box-v2{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--space-4) var(--space-5) var(--space-3);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition),border-color var(--transition);position:relative}.input-box-v2:focus-within{box-shadow:0 2px 24px #4a5bff1f,var(--shadow-md);border-color:var(--color-accent)}.input-file-previews{display:flex;gap:var(--space-2);flex-wrap:wrap;padding-bottom:var(--space-3)}.input-file-chip{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);background:var(--color-surface-hover);border:1px solid var(--color-border);border-radius:var(--radius-md);max-width:220px;position:relative;overflow:hidden}.input-file-chip-icon{font-size:16px;flex-shrink:0}.input-file-chip-info{display:flex;flex-direction:column;min-width:0}.input-file-chip-name{font-size:var(--text-xs);color:var(--color-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.input-file-chip-size{font-size:10px;color:var(--color-text-tertiary)}.input-file-chip.uploading{border-color:#4a5bff4d}.input-file-chip.done .input-file-chip-size{color:#4ade80}.input-file-chip.error{border-color:#ef444466}.input-file-chip.error .input-file-chip-size{color:#ef4444}.input-file-chip-progress{position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--color-border);border-radius:0 0 var(--radius-md) var(--radius-md);overflow:hidden}.input-file-chip-progress-bar{height:100%;background:var(--color-accent);transition:width .2s ease}.input-upload-status{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--color-accent)}.input-upload-spinner{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.input-file-chip-remove{width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--color-text-tertiary);flex-shrink:0;transition:all var(--transition-fast)}.input-file-chip-remove:hover{background:var(--color-surface-hover);color:var(--color-text)}.input-selected-tools{display:flex;gap:var(--space-2);flex-wrap:wrap;padding-bottom:var(--space-2)}.input-tool-tag{display:inline-flex;align-items:center;gap:var(--space-1);padding:2px 10px;background:#4a5bff1a;border:1px solid rgba(74,91,255,.25);border-radius:var(--radius-full);font-size:11px;color:var(--color-accent)}.input-tool-tag-remove{font-size:10px;color:var(--color-text-tertiary);margin-left:2px;transition:color var(--transition-fast)}.input-tool-tag-remove:hover{color:var(--color-text)}.input-textarea-v2{width:100%;border:none;outline:none;resize:none;background:transparent;font-size:var(--text-base);line-height:1.6;color:var(--color-text);min-height:24px;max-height:160px;padding:0;font-family:var(--font-sans)}.input-textarea-v2::placeholder{color:var(--color-text-tertiary)}.input-textarea-v2:disabled{opacity:.5}.input-toolbar{display:flex;align-items:center;justify-content:space-between;margin-top:var(--space-3);padding-top:var(--space-2);border-top:1px solid var(--color-border)}.input-toolbar-left{display:flex;align-items:center;gap:var(--space-2)}.input-toolbar-right{display:flex;align-items:center;gap:var(--space-3)}.input-toolbar-btn{display:inline-flex;align-items:center;gap:var(--space-1);color:var(--color-text-secondary);font-size:var(--text-sm);font-weight:500;transition:all var(--transition-fast);padding:var(--space-1) var(--space-2);border-radius:var(--radius-sm)}.input-toolbar-btn:hover{color:var(--color-text);background:var(--color-surface-hover)}.input-attach-btn{width:30px;height:30px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;padding:0;border:1px solid var(--color-border)}.input-attach-btn:hover{border-color:var(--color-text-secondary)}.input-tools-btn{padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);border:1px solid 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var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:200;padding:var(--space-1) 0;animation:dropdownIn .15s ease}@keyframes dropdownIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.input-tools-dropdown-header{padding:var(--space-2) var(--space-4);font-size:11px;font-weight:600;color:var(--color-text-tertiary);text-transform:uppercase;letter-spacing:.5px}.input-tools-dropdown-item{display:flex;align-items:center;gap:var(--space-3);width:100%;padding:var(--space-2) var(--space-4);color:var(--color-text-secondary);font-size:var(--text-sm);transition:all var(--transition-fast);text-align:left}.input-tools-dropdown-item:hover{background:var(--color-surface-hover);color:var(--color-text)}.input-tools-dropdown-item.selected{color:var(--color-accent)}.input-tools-dropdown-icon{font-size:16px;width:20px;text-align:center;flex-shrink:0}.input-tools-dropdown-name{flex:1}.input-tools-dropdown-check{color:var(--color-accent);flex-shrink:0}.input-char-count{font-size:12px;color:var(--color-text-tertiary);font-variant-numeric:tabular-nums;white-space:nowrap}.input-char-count.warning{color:var(--color-warning)}.input-send-btn-v2{width:36px;height:36px;border-radius:var(--radius-md);background:var(--color-accent);color:#fff;display:flex;align-items:center;justify-content:center;transition:all var(--transition);flex-shrink:0}.input-send-btn-v2:hover{background:var(--color-accent-hover);transform:scale(1.08);box-shadow:0 2px 12px 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var(--transition-fast)}.file-card:hover{border-color:var(--color-primary);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.file-card-icon{width:40px;height:40px;border-radius:var(--radius-md);background:var(--color-surface-hover);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--color-primary)}.file-card-icon svg{width:20px;height:20px}.file-card-content{flex:1;min-width:0;display:flex;flex-direction:column;gap:var(--space-1)}.file-card-title{margin:0;font-size:var(--text-sm);font-weight:600;color:var(--color-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-card-meta{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-xs);color:var(--color-text-dim)}.file-card-actions{display:flex;align-items:center;gap:var(--space-1);opacity:0;transition:opacity var(--transition-fast)}.file-card:hover 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var(--transition-fast)}.settings-option:hover{border-color:var(--color-border-light);background:var(--color-surface-hover)}.settings-option.active{border-color:var(--color-primary);background:var(--color-primary-light);color:var(--color-text-inverse)}.settings-option-icon,.settings-flag{font-size:24px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.preview-modal-overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background-color:#000000b3;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:9999;padding:var(--space-4);opacity:0;visibility:hidden;transition:all .2s ease-out}.preview-modal-overlay.open{opacity:1;visibility:visible}.preview-modal-content{background:var(--color-surface);border:1px solid 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svg{color:var(--color-text-tertiary)}@media(max-width:768px){.sidebar{position:fixed;left:0;top:0;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.sidebar-overlay{position:fixed;inset:0;background:#00000080;z-index:99;opacity:0;visibility:hidden;transition:all var(--transition-slow)}.sidebar-overlay.visible{opacity:1;visibility:visible}.topbar-menu-btn{display:flex}.chat-suggestions{grid-template-columns:1fr}.chat-messages-inner{padding:0 var(--space-4)}.input-area{padding:var(--space-3) var(--space-4) var(--space-4)}.preview-modal-content{max-height:95vh}.preview-media,.preview-iframe{max-height:calc(95vh - 60px)}}