:root{--bg-primary: #eef2f5;--bg-secondary: #ffffff;--bg-tertiary: #f5f7fa;--text-primary: #333333;--text-secondary: #5f6368;--text-tertiary: #80868b;--border-color: #dadce0;--border-light: #e8eaed;--card-bg: #ffffff;--card-shadow: rgba(0, 0, 0, .08);--hover-bg: #f8f9fa;--input-bg: #ffffff;--input-border: #dadce0;--button-primary: #1967d2;--button-primary-hover: #1557b0;--button-secondary: #4caf50;--button-secondary-hover: #388e3c;--success-color: #4caf50;--error-color: #f44336;--warning-color: #ff9800;--link-color: #1967d2;--status-success: #0d652d;--status-success-bg: #d4edda;--status-success-text: #0d652d;--status-warning: #856404;--status-warning-bg: #fff3cd;--status-warning-text: #856404;--status-error: #d93025;--status-error-bg: #fee;--status-error-dark: #b71c1c;--status-error-text: #721c24;--disabled-bg: #f8f9fa;--text-disabled: #80868b;--focus-ring: rgba(26, 115, 232, .1);--button-hover-shadow: rgba(26, 115, 232, .3);--button-primary-light: linear-gradient(135deg, #e8f0fe 0%, #d2e3fc 100%);--font-size-xs: 11px;--font-size-sm: 13px;--font-size-base: 15px;--font-size-lg: 17px;--font-size-xl: 20px;--font-size-2xl: 24px;--font-size-3xl: 30px;--font-size-4xl: 38px;--line-height-tight: 1.25;--line-height-normal: 1.5;--line-height-relaxed: 1.75;--surface-default: var(--bg-primary);--surface-secondary: var(--bg-secondary);--surface-tertiary: var(--bg-tertiary);--surface-elevated: var(--card-bg);--surface-hover: var(--hover-bg);--sidebar-border: var(--border-color);--sidebar-hover-bg: #eef4ff;--sidebar-active-bg: #dbeafe;--sidebar-active-text: #0b1f3a;--panel-shadow-soft: 0 2px 12px rgba(15, 23, 42, .08);--input-placeholder: #9aa0a6;--overlay-scrim: rgba(0, 0, 0, .5)}[data-theme=dark]{--bg-primary: #1a1a1a;--bg-secondary: #2d2d2d;--bg-tertiary: #252525;--text-primary: #e8eaed;--text-secondary: #9aa0a6;--text-tertiary: #70757a;--border-color: #3c4043;--border-light: #2d2d2d;--card-bg: #292929;--card-shadow: rgba(0, 0, 0, .3);--hover-bg: #3c4043;--input-bg: #2d2d2d;--input-border: #3c4043;--button-primary: #8ab4f8;--button-primary-hover: #aecbfa;--button-secondary: #81c995;--button-secondary-hover: #a8dab5;--success-color: #81c995;--error-color: #f28b82;--warning-color: #fdd663;--link-color: #8ab4f8;--status-success: #81c995;--status-success-bg: #1e3a28;--status-success-text: #81c995;--status-warning: #fdd663;--status-warning-bg: #3a3420;--status-warning-text: #fdd663;--status-error: #f28b82;--status-error-bg: #3a2020;--status-error-dark: #d16a61;--status-error-text: #f28b82;--disabled-bg: #3c4043;--text-disabled: #70757a;--focus-ring: rgba(138, 180, 248, .2);--button-hover-shadow: rgba(138, 180, 248, .3);--button-primary-light: #3c4043;--surface-default: var(--bg-primary);--surface-secondary: var(--bg-secondary);--surface-tertiary: var(--bg-tertiary);--surface-elevated: var(--card-bg);--surface-hover: var(--hover-bg);--sidebar-border: var(--border-color);--sidebar-hover-bg: rgba(138, 180, 248, .15);--sidebar-active-bg: rgba(138, 180, 248, .25);--sidebar-active-text: var(--text-primary);--panel-shadow-soft: 0 2px 16px rgba(0, 0, 0, .6);--input-placeholder: var(--text-tertiary);--overlay-scrim: rgba(0, 0, 0, .65)}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--surface-default);color:var(--text-primary);font-size:var(--font-size-base);line-height:var(--line-height-normal);position:relative;overflow-x:hidden;transition:background-color .3s ease,color .3s ease}*{box-sizing:border-box}.icon-btn{background-color:#e8f0fe;color:#1a2a4d;border:none;width:40px;height:40px;border-radius:50%;font-size:20px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 5px #0003;transition:background-color .2s;line-height:1;flex-shrink:0}.icon-btn:hover{background-color:#d2e3fc}.modern-sidebar{width:var(--sidebar-width);height:var(--app-height, 100vh);background:var(--sidebar-bg);display:flex;flex-direction:column;z-index:201;border-right:1px solid var(--sidebar-border);flex-shrink:0}.ai-search-app.sidebar-animating .modern-sidebar{transition:width .3s cubic-bezier(.4,0,.2,1),transform .3s cubic-bezier(.4,0,.2,1)}@media (min-width: 1025px){.modern-sidebar{position:relative}.modern-sidebar:not(.open){width:0;overflow:hidden;border-right:none}}@media (max-width: 1024px){.modern-sidebar{position:fixed;left:0;top:0}}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:20px 16px;border-bottom:1px solid var(--sidebar-border)}.sidebar-title{font-size:20px;font-weight:600;color:var(--sidebar-text);letter-spacing:-.3px}.sidebar-close-btn{display:none}.new-task-btn{margin:16px;padding:10px 14px;background:transparent;border:1px solid var(--sidebar-border);border-radius:8px;color:var(--sidebar-text);font-size:14px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .2s ease}.new-task-btn:hover{background:var(--sidebar-hover);border-color:var(--border-color)}.sidebar-nav{flex:1;overflow-y:auto;overflow-x:hidden;padding:8px 0;min-height:0}.sidebar-nav::-webkit-scrollbar{width:6px}.sidebar-nav::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.nav-section{margin-bottom:8px}.nav-section-title{padding:8px 16px 4px;font-size:11px;font-weight:700;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;border-top:1px solid var(--border-color);margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.nav-items{list-style:none;padding:0;margin:0}.nav-item{margin:0}.nav-link{display:flex;align-items:center;gap:12px;padding:11px 18px;margin:2px 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var(--sidebar-border)}.user-profile-dropdown{position:relative}.user-profile-trigger{width:100%;display:flex;align-items:center;gap:12px;padding:10px 12px;background:transparent;border:none;border-radius:8px;cursor:pointer;transition:background .2s ease}.user-profile-trigger:hover{background:var(--sidebar-hover)}.user-avatar{width:32px;height:32px;border-radius:50%;background:var(--button-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex-shrink:0}.user-info{flex:1;text-align:left;min-width:0}.user-name{font-size:13px;font-weight:600;color:var(--sidebar-text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-email{font-size:12px;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-profile-trigger svg{width:16px;height:16px;color:var(--text-tertiary);flex-shrink:0}.user-profile-dropdown-menu{position:absolute;bottom:calc(100% + 8px);left:0;right:0;background:var(--surface-elevated);border:1px solid var(--border-color);border-radius:8px;box-shadow:var(--panel-shadow-soft);padding:6px;opacity:0;visibility:hidden;transform:translateY(4px);transition:all .2s ease}.user-profile-dropdown.open .user-profile-dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-item{width:100%;display:flex;align-items:center;gap:12px;padding:10px 12px;background:transparent;border:none;border-radius:6px;color:var(--text-secondary);font-size:13px;text-decoration:none;cursor:pointer;transition:all .2s ease}.dropdown-item:hover{background:var(--surface-hover);color:var(--text-primary)}.dropdown-item.danger{color:var(--status-error)}.dropdown-item.danger:hover{background:var(--status-error-bg)}.dropdown-icon{width:16px;height:16px}@media (max-width: 1024px){.modern-sidebar{width:280px;max-width:75vw;height:100%;height:100dvh;transform:translate(-100%);transition:transform .3s cubic-bezier(.4,0,.2,1);box-shadow:2px 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100vh);overflow:hidden;background:var(--surface-secondary);position:relative}.content-area{flex:1;display:flex;flex-direction:column;overflow:hidden;position:relative}.main-content-topbar{position:fixed;top:16px;right:16px;display:flex;align-items:center;gap:12px;z-index:120}.quota-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:var(--surface-elevated);border:1px solid var(--border-color);box-shadow:var(--panel-shadow-soft);color:var(--text-primary)}.quota-label{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-secondary)}.quota-value{font-size:var(--font-size-sm);font-weight:600;color:var(--text-primary)}.quota-detail{font-size:11px;color:var(--text-secondary);font-weight:500}.quota-chip.quota-warning{border-color:#fdd66399;background:linear-gradient(135deg,#fdd6632e,#fdd66314)}.quota-chip.quota-critical{border-color:#f28b82bf;background:linear-gradient(135deg,#f28b8233,#f28b821a)}.quota-chip.quota-admin{border-color:#81c99599;background:linear-gradient(135deg,#81c99538,#81c99514)}.quota-chip.quota-warning .quota-value,.quota-chip.quota-critical .quota-value,.quota-chip.quota-warning .quota-detail,.quota-chip.quota-critical .quota-detail{color:var(--text-primary)}.backend-status-pill{padding:8px 14px;border-radius:999px;font-size:var(--font-size-sm);font-weight:600;border:1px solid var(--status-warning);background:var(--status-warning-bg);color:var(--status-warning-text)}.backend-status-pill.offline{border-color:var(--status-error);background:var(--status-error-bg);color:var(--status-error-text)}.welcome-screen{flex:1;position:relative;overflow:hidden}.welcome-content{position:absolute;top:140px;left:0;right:0;text-align:center;padding:0 20px}.logo-section svg,.logo-section img{width:100px;height:100px;margin:0 auto 12px;filter:drop-shadow(0 6px 18px rgba(25,103,210,.15))}.app-description{font-size:15px;color:var(--text-secondary)}.conversation-area{flex:1;overflow-y:scroll;overflow-x:hidden;-webkit-overflow-scrolling:touch;background:var(--surface-secondary);position:relative;touch-action:pan-y}.conversation-container{width:100%;max-width:100%;padding:82px 8px 280px;min-height:100%}.icons-row{display:flex;align-items:center;gap:16px;margin-bottom:24px;padding:0 4px}.conversation-turn{margin-bottom:36px;width:100%}.message{margin-bottom:20px;width:100%}.loading-dots{display:flex;gap:4px}.loading-dots span{width:4px;height:4px;border-radius:50%;background:var(--surface-elevated)}.loading-dots span:nth-child(1){animation-delay:-.32s}.loading-dots span:nth-child(2){animation-delay:-.16s}.user-message{display:flex;width:100%;padding:0 4px}.user-message .message-content{flex:1;font-size:1.25rem;line-height:1.6;color:var(--color-text-primary);font-weight:600;text-align:left}.user-message-with-avatar{display:flex;align-items:flex-start;gap:12px;width:100%;padding:4px 4px 0;margin-bottom:16px}.user-message-with-avatar .message-content{flex:1;font-size:1.25rem;line-height:1.6;color:var(--color-text-primary);font-weight:600;text-align:left}.user-message-with-avatar.previous-turn{margin-bottom:12px}.message-separator{width:100%;height:1px;background:linear-gradient(90deg,transparent 0%,rgba(25,103,210,.14) 20%,rgba(25,103,210,.12) 80%,transparent 100%);margin:16px 0}[data-theme=dark] .message-separator{background:linear-gradient(90deg,transparent 0%,rgba(138,180,248,.45) 25%,rgba(138,180,248,.2) 75%,transparent 100%)}.assistant-message,.assistant-message-with-logo{display:flex;flex-direction:column;align-items:flex-start;width:100%;padding:0 4px}.assistant-logo-header{display:flex;flex-direction:row;align-items:center;gap:16px;margin-bottom:16px;width:100%;justify-content:flex-start}.assistant-logo-container{width:64px;height:64px;flex-shrink:0;display:flex;align-items:center;justify-content:flex-start}.assistant-logo-container svg,.assistant-logo-container img{width:64px;height:64px}.assistant-brand-name{font-size:1.125rem;font-weight:700;color:var(--text-primary);letter-spacing:.01em;text-align:left;flex:1}.response-time{font-size:.875rem;font-weight:500;color:var(--text-secondary);margin-left:auto;padding:4px 12px;background:#3b82f614;border-radius:12px;white-space:nowrap}.assistant-response-content{width:100%;max-width:100%;font-size:19px;line-height:1.7;color:var(--text-primary);word-wrap:break-word;overflow-wrap:break-word;display:flex;flex-direction:column;gap:12px;padding-right:8px}.loading-indicator{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#1967d2,#1557b0);display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px #1967d240}.conversation-turn.active{margin-bottom:40px}.search-interface-container{position:fixed;bottom:0;left:0;right:0;padding:12px 16px;padding-bottom:max(16px,env(safe-area-inset-bottom));background:var(--surface-secondary);z-index:100}.backend-status-banner{background:var(--status-warning-bg);color:var(--status-warning-text);padding:12px 16px;text-align:center;border-bottom:1px solid var(--status-warning);font-size:14px;position:sticky;top:0;z-index:50}@media (min-width: 769px){.logo-section svg,.logo-section img{width:140px;height:140px}.app-description{font-size:18px}.conversation-area{padding-bottom:200px}.conversation-container{width:min(50vw,720px);margin:0 auto;padding:90px 16px 100px}.icons-row{gap:20px;margin-bottom:32px}.user-message .message-content{font-size:20px}.assistant-response-content{font-size:18px}.assistant-logo-container{width:72px;height:72px;justify-content:flex-start}.assistant-logo-container svg,.assistant-logo-container img{width:72px;height:72px}.assistant-brand-name{font-size:1.25rem}.search-interface-container{padding:16px 24px 20px;display:flex;justify-content:center}.search-interface-container .modern-search-interface{width:min(50vw,720px)}}@media (max-width: 768px){.main-content-topbar{top:12px;right:12px;gap:8px}.quota-chip{padding:6px 12px;gap:6px}.quota-label{font-size:10px}.quota-detail{display:none}.conversation-container{padding:82px 6px 80px}.icons-row{gap:12px;margin-bottom:20px}.user-message{margin-bottom:14px;margin-top:6px}.user-message .message-content{font-size:18px;line-height:1.6}.user-message-with-avatar{gap:10px;margin-bottom:14px;padding:6px 4px 0}.user-message-with-avatar .message-content{font-size:18px;line-height:1.6}.message-separator{margin:14px 0}.assistant-response-content{font-size:16px;line-height:1.6}.assistant-logo-container{width:64px;height:64px;justify-content:flex-start}.assistant-logo-container svg,.assistant-logo-container img{width:64px;height:64px}.assistant-brand-name{font-size:1.05rem}.loading-indicator{width:28px;height:28px}}@media (min-width: 1025px){.welcome-screen{position:relative;width:100%;height:100%;display:flex;align-items:center;justify-content:center;overflow:visible}.welcome-content{position:static;display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;max-width:800px;margin:0 auto;padding:0}}.response-container{width:100%;max-width:100%;margin:0;padding:0}@media (max-width: 768px){.response-container{padding:0;max-width:100%}}.response-content{line-height:var(--line-height-relaxed, 1.7);color:var(--text-primary);font-size:var(--font-size-lg, 19px);text-align:left;width:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;letter-spacing:.01em}.response-content>*:first-child{margin-top:0}@media (max-width: 768px){.response-content{font-size:var(--font-size-base, 17px)}}.response-content.streaming{white-space:pre-wrap;word-wrap:break-word}.streaming-text{white-space:pre-wrap;word-wrap:break-word;font-family:inherit;line-height:1.75;color:var(--text-primary)}.response-h2{font-size:var(--font-size-2xl, 26px);font-weight:700;margin-top:1.25rem;margin-bottom:.6rem;color:var(--text-primary);letter-spacing:-.02em;border-bottom:2px solid var(--border-light);padding-bottom:.5rem}.response-h3{font-size:var(--font-size-xl, 22px);font-weight:600;margin-top:1rem;margin-bottom:.5rem;color:var(--text-primary)}@media (max-width: 768px){.response-h2{font-size:var(--font-size-xl, 22px)}.response-h3{font-size:var(--font-size-lg, 20px)}}.response-paragraph{margin-bottom:.45rem;line-height:1.55;text-align:left;color:var(--text-primary);padding-right:0}@media (max-width: 768px){.response-paragraph{margin-bottom:.35rem;line-height:1.5}}.share-card-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;display:flex;align-items:center;justify-content:center;padding:20px;z-index:1200}.share-card{width:100%;max-width:360px;background:var(--surface-elevated);border-radius:18px;box-shadow:var(--panel-shadow-soft);padding:22px 24px 26px;display:flex;flex-direction:column;gap:18px}.share-card-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.share-card-title{font-size:1.1rem;font-weight:600;color:var(--text-primary)}.share-card-close{border:none;background:none;color:var(--text-secondary);font-size:1.25rem;cursor:pointer;padding:4px;border-radius:8px;line-height:1;transition:all .2s ease}.share-card-close:hover{background:#94a3b829;color:var(--text-primary)}.share-card-subtitle{font-size:.95rem;color:var(--text-secondary);margin:0}.share-card-options{display:flex;flex-direction:column;gap:12px}.share-card-button{display:flex;align-items:center;gap:14px;border:1.5px solid var(--border-light);border-radius:14px;padding:12px 14px;background:linear-gradient(135deg,#f8fafc1f,#ffffff1f);color:var(--text-primary);text-align:left;cursor:pointer;transition:all .2s ease}.share-card-button:hover{border-color:var(--button-primary);box-shadow:0 12px 24px 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