:root{--app-bg: #ffffff;--sidebar-bg: #171717;--sidebar-bg-elevated: #222327;--sidebar-w: 264px;--sidebar-w-collapsed: 66px;--panel-bg: #ffffff;--panel-muted: #f7f7f8;--panel-soft: #f3f4f6;--panel-softer: #fafafa;--line: #e5e7eb;--line-strong: #d1d5db;--text: #111827;--text-soft: #374151;--text-muted: #6b7280;--text-inverse: #f9fafb;--text-chat: #353740;--accent: #111827;--accent-soft: #eef2ff;--green: #10a37f;--danger: #dc2626;--shadow-soft: 0 10px 30px rgba(17, 24, 39, .05);--shadow-card: 0 1px 2px rgba(17, 24, 39, .06);--radius-xl: 24px;--radius-lg: 18px;--radius-md: 14px;--radius-sm: 10px;--chat-max-width: 820px;--chat-footer-pad-x: 24px;--font-chat-body: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif}*{box-sizing:border-box}html,body,#app{min-height:100%}body{margin:0;background:var(--app-bg);color:var(--text);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}button,input,textarea{font:inherit}button{border:0}button:focus-visible,input:focus-visible,textarea:focus-visible,a:focus-visible{outline:2px solid rgba(16,163,127,.35);outline-offset:2px}a{color:var(--text)}.app-shell{display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);min-height:100vh;min-height:100dvh;background:var(--app-bg)}.app-shell.is-sidebar-collapsed{--sidebar-w: var(--sidebar-w-collapsed)}@media (min-width: 981px){html{height:100%;overflow:hidden}body{height:100%;overflow:hidden;overscroll-behavior:none}#app{height:100dvh;max-height:100dvh;overflow:hidden;display:flex;flex-direction:column;min-height:0}.app-shell{display:block;position:relative;flex:1 1 auto;min-height:0;width:100%;max-height:100%;overflow:hidden}.app-shell>.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);max-width:var(--sidebar-w);min-height:0;z-index:30;overflow:hidden;box-sizing:border-box}.app-shell>.main-panel{margin-left:var(--sidebar-w);width:auto;min-width:0;height:100%;max-height:100%;min-height:0;overflow:hidden;display:flex;flex-direction:column}}.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}.sidebar{display:flex;flex-direction:column;gap:14px;padding:14px 10px 12px;background:var(--sidebar-bg);color:var(--text-inverse);min-height:0;overflow:hidden}.sidebar-nav-cluster{display:flex;flex-direction:column;flex:1 1 auto;min-height:0;gap:14px;overflow:hidden}.sidebar-head{flex-shrink:0;min-width:0}.sidebar-toolbar{display:none}@media (min-width: 981px){.sidebar-head{display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:10px;padding:0 4px 0 6px;margin:-2px 0 2px}.sidebar-head .brand-card{flex:1;min-width:0;padding:2px 0 4px}.sidebar-head .sidebar-toolbar{display:flex;justify-content:flex-end;flex-shrink:0;padding:0;margin:0}.sidebar-toggle{display:grid;place-items:center;width:34px;height:34px;padding:0;border:0;border-radius:10px;background:transparent;color:#f9fafb8c;cursor:pointer}.sidebar-toggle:hover{color:#f9fafbf2;background:var(--sidebar-bg-elevated)}.sidebar-toggle:focus-visible{outline:2px solid rgba(16,163,127,.45);outline-offset:2px}.sidebar-toggle-icon{width:18px;height:18px}.sidebar-toggle svg.icon-stroke path{fill:none;stroke:currentColor;stroke-width:1.85;stroke-linecap:round;stroke-linejoin:round}.sidebar.is-collapsed{padding:12px 8px;align-items:center;gap:12px}.sidebar.is-collapsed .sidebar-head{flex-direction:column;align-items:center;gap:10px;width:100%;padding:0;margin:0 0 4px}.sidebar.is-collapsed .sidebar-head .sidebar-toolbar{order:-1;width:100%;justify-content:center;margin:0}.sidebar.is-collapsed .brand-name,.sidebar.is-collapsed .brand-row>div:last-child{display:none}.sidebar.is-collapsed .brand-row{justify-content:center}.sidebar.is-collapsed .brand-card{padding:4px 0}.sidebar.is-collapsed .new-session-button span{display:none}.sidebar.is-collapsed .new-session-button{justify-content:center;padding:11px 10px}.sidebar.is-collapsed .sidebar-section-label,.sidebar.is-collapsed .session-list,.sidebar.is-collapsed .sidebar-footer-button span{display:none}.sidebar.is-collapsed .sidebar-footer-button{justify-content:center;padding:9px 10px}.sidebar.is-collapsed .sidebar-footer{width:100%}}.brand-card{padding:6px 10px 2px}.brand-row{display:flex;align-items:center;gap:12px}.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:12px;background:linear-gradient(135deg,#2a2b32,#111111);border:1px solid rgba(255,255,255,.08)}.brand-mark span{width:14px;height:14px;border-radius:50%;background:linear-gradient(135deg,#10a37f,#4ade80)}.brand-name{margin:0;font-size:.94rem;font-weight:600;color:var(--text-inverse)}.brand-subtitle,.sidebar-section-label{margin:0;color:#f9fafb80;font-size:.74rem}.sidebar-section-label{padding:6px 10px 0;letter-spacing:.01em}.new-session-button{width:100%;display:inline-flex;align-items:center;gap:10px;border-radius:12px;padding:11px 14px;background:#24262b;color:var(--text-inverse);cursor:pointer;text-align:left;font-weight:500}.new-session-button:hover{background:#2d3037}.new-session-button svg,.sidebar-footer-button svg,.ghost-button-inline svg,.text-button-inline svg{width:16px;height:16px;flex:0 0 auto}.session-list{display:flex;flex:1;flex-direction:column;gap:4px;min-height:0;overflow-x:hidden;overflow-y:auto;overscroll-behavior-y:contain;padding:0 0 0 2px}.session-item-wrap{display:flex;align-items:stretch;gap:0;min-width:0;border-radius:10px}.session-item-wrap.is-editing{display:block}.session-item-wrap:hover{background:var(--sidebar-bg-elevated)}.session-item-wrap.active{background:var(--sidebar-bg-elevated);box-shadow:inset 0 0 0 1px #10a37f59}.session-item-select{flex:1;min-width:0;display:flex;flex-direction:column;align-items:stretch;gap:5px;margin:0;padding:9px 4px 9px 10px;border:0;border-radius:8px;background:transparent;color:#f9fafbf0;cursor:pointer;text-align:left;font:inherit}.session-item-select:focus-visible{outline:2px solid rgba(16,163,127,.45);outline-offset:0}.session-item--edit{padding:9px 10px;border-radius:8px}.session-item-time{display:block;align-self:stretch;font-size:.72rem;line-height:1;letter-spacing:.02em;color:#f9fafb73;white-space:nowrap;flex-shrink:0;text-align:right;padding-right:10px;box-sizing:border-box}.session-item-side{display:flex;flex-direction:column;align-items:flex-end;justify-content:space-between;align-self:stretch;min-height:0;padding:8px 0 7px 2px;flex-shrink:0}.session-item-actions{display:flex;flex-direction:row;align-items:center;justify-content:flex-end;gap:0;padding:0;flex-shrink:0}.session-action-btn{display:grid;place-items:center;width:26px;height:28px;padding:0;border:0;border-radius:6px;background:transparent;color:#f9fafb6b;cursor:pointer;opacity:.88;transition:opacity .14s ease,color .14s ease,background .14s ease}.session-item-wrap:hover .session-action-btn,.session-item-wrap:focus-within .session-action-btn{opacity:1;color:#f9fafb8c}.session-action-btn:hover{color:#f9fafbf2;background:rgba(255,255,255,.08)}.session-action-icon{width:15px;height:15px;display:block}.session-action-icon-fill path{fill:currentColor}.session-action-btn svg.icon-stroke path{fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}.session-title-input{display:block;width:100%;box-sizing:border-box;margin:0;padding:6px 8px;border:1px solid rgba(255,255,255,.18);border-radius:8px;background:rgba(0,0,0,.28);color:#f9fafbf5;font-size:.88rem;font-weight:500}.session-title-input::placeholder{color:#f9fafb59}.session-title-input:focus-visible{outline:2px solid rgba(16,163,127,.45);outline-offset:1px}.session-edit-hint{margin:6px 0 0;font-size:.68rem;color:#f9fafb6b}.session-item-head{display:block;min-width:0}.session-item-head strong{font-size:.9rem;font-weight:500;min-width:0;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.session-item-preview{margin:0;font-size:.8rem;line-height:1.35;color:#f9fafb7a;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;min-width:0}.brand-card,.new-session-button,.sidebar-section-label{flex-shrink:0}.sidebar-footer{flex-shrink:0;padding:6px 2px 0}.sidebar-footer-button{width:100%;display:inline-flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px;background:transparent;color:#f9fafbb8;cursor:pointer;text-align:left}.sidebar-footer-button:hover{background:var(--sidebar-bg-elevated)}.secondary-button,.ghost-button,.text-button,.follow-up-chip,.prompt-card{transition:background .14s ease,border-color .14s ease,color .14s ease}.secondary-button,.ghost-button,.text-button{border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--text-soft);cursor:pointer}.secondary-button{width:100%;padding:10px 12px;background:#242424;border-color:#ffffff14;color:var(--text-inverse)}.secondary-button:hover{background:#2f2f2f}.ghost-button,.text-button{padding:8px 10px;font-size:.84rem}.ghost-button-inline,.text-button-inline{display:inline-flex;align-items:center;gap:6px}.ghost-button:hover,.text-button:hover,.prompt-card:hover,.follow-up-chip:hover{background:var(--panel-soft);color:var(--text-soft)}.main-panel{display:flex;flex-direction:column;min-width:0;min-height:0;background:#fff}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 22px 10px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.94);flex:0 0 auto;z-index:10}.topbar-menu-btn{display:none}.topbar-heading{min-width:0;flex:1}.topbar-heading h2{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar-label,.brand-eyebrow{margin:0 0 4px;color:var(--text-muted);font-size:.74rem;font-weight:500}.topbar h2,.empty-hero h3,.settings-header h3{margin:0;font-size:.94rem;font-weight:600;letter-spacing:-.01em}.topbar-actions{display:flex;align-items:center;gap:8px}.health-pill{display:inline-flex;align-items:center;gap:8px;padding:7px 9px;border-radius:999px;background:var(--panel-softer);color:var(--text-muted);font-size:.78rem}.health-dot{width:8px;height:8px;border-radius:50%;background:var(--text-muted)}.health-pill.ready .health-dot{background:var(--green)}.health-pill.error .health-dot{background:var(--danger)}.chat-stage{display:flex;flex:1;flex-direction:column;min-height:0}.chat-stage.is-empty{justify-content:center;padding-bottom:4vh}.empty-stage,.message-list{flex:1;min-height:0}.empty-stage{display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:16px;padding:16px 24px 8px;overflow-x:hidden;overflow-y:auto;overscroll-behavior-y:contain}.empty-hero{max-width:560px;text-align:center}.empty-hero h3{font-size:clamp(1.5rem,2.8vw,2rem);line-height:1.12}.empty-hero p{margin:8px 0 0;color:var(--text-muted);line-height:1.55;font-size:.96rem}.empty-grid{width:min(660px,100%);display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.prompt-card{border:1px solid var(--line);border-radius:8px;padding:11px 14px;background:#fff;color:var(--text-soft);cursor:pointer;text-align:left;line-height:1.4;font-size:.86rem;font-weight:500;box-shadow:0 1px #1118270a}.prompt-card:hover{background:var(--panel-muted);border-color:var(--line-strong);color:var(--text)}.message-list{width:100%;overflow-x:hidden;overflow-y:auto;overscroll-behavior-y:contain;padding:0 0 24px}.message-row{width:min(var(--chat-max-width),calc(100% - 2 * var(--chat-footer-pad-x)));margin:0 auto;display:flex;align-items:flex-start;gap:14px;padding:24px 0 0}.message-row.is-assistant-streaming .message-card{contain:layout}.message-row.is-assistant-streaming .reasoning-body,.message-row.is-assistant-streaming .answer-section .message-content{text-wrap:pretty}.message-row.is-user{justify-content:flex-end}.message-avatar{width:28px;height:28px;flex:0 0 auto;display:grid;place-items:center;border-radius:9px;background:var(--panel-muted);color:var(--text-soft);font-size:.72rem;font-weight:700}.message-avatar span{line-height:1}.is-assistant .message-avatar{background:#111827;color:#fff}.is-user .message-avatar{order:2;background:#eceff3;color:#111827}.message-card{max-width:calc(100% - 42px);padding:0}.message-row.is-assistant .message-card{flex:1 1 0%;min-width:0}.is-user .message-card{display:flex;flex-direction:column;align-items:flex-end}.is-user .message-content{display:inline-block;max-width:min(640px,100%);border-radius:18px;padding:12px 16px;background:#f3f4f6;color:var(--text-chat)}.message-meta{display:flex;align-items:center;gap:10px;min-height:28px;margin-bottom:4px}.message-meta strong{font-size:.92rem;font-weight:600;line-height:1}.message-meta>span{font-size:.86rem;line-height:1}.message-meta span,.status-bar,.composer-topline,.settings-field span{color:var(--text-muted)}.reasoning-section{margin:0 0 8px;padding:8px 11px;border-radius:10px;background:var(--panel-muted)}.reasoning-section.is-reasoning-collapsed{padding:5px 11px}.reasoning-head{display:flex;align-items:center;flex-wrap:wrap;gap:6px 10px;margin:0;min-height:0;line-height:1.2}.reasoning-head .reasoning-label{margin:0}.reasoning-toggle{display:inline-flex;align-items:center;justify-content:center;margin:0;padding:2px;min-width:22px;min-height:22px;border:0;border-radius:0;background:transparent;color:var(--text-muted);cursor:pointer;box-shadow:none;-webkit-appearance:none;-moz-appearance:none;appearance:none;-webkit-tap-highlight-color:transparent;transition:color .15s ease}.reasoning-toggle::-moz-focus-inner{border:0}.reasoning-toggle:hover,.reasoning-toggle:active,.reasoning-toggle:focus{background:transparent;box-shadow:none}.reasoning-toggle-icon{display:block;width:18px;height:18px;flex-shrink:0;transition:transform .2s ease}.reasoning-toggle.is-expanded .reasoning-toggle-icon{transform:rotate(180deg)}.reasoning-toggle:hover{color:var(--text-soft)}.reasoning-toggle:focus-visible{outline:2px solid rgba(16,163,127,.35);outline-offset:2px}.reasoning-label,.answer-label{margin:0 0 5px;font-size:.72rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--text-muted)}.answer-section .answer-label{margin-bottom:4px}.reasoning-body{margin:5px 0 0;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:.84rem;line-height:1.65;white-space:pre-wrap;word-break:break-word;color:var(--text-soft)}.reasoning-body.is-streaming-tail:after,.message-content.is-streaming-tail:after{content:"";display:inline-block;width:2px;height:.95em;margin-left:3px;vertical-align:-.1em;border-radius:1px;background:var(--green);animation:stream-caret .85s ease-in-out infinite}@keyframes stream-caret{0%,to{opacity:1}50%{opacity:.15}}.answer-section .message-content.quiet{color:var(--text-muted);font-style:italic}.message-content{margin:0;font-family:var(--font-chat-body);font-size:.9375rem;font-weight:400;line-height:1.65;letter-spacing:0;white-space:pre-wrap;overflow-wrap:break-word;color:var(--text-chat);-webkit-font-smoothing:antialiased}.assistant-post-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px 14px;margin-top:10px;flex-wrap:wrap;width:100%;box-sizing:border-box}.assistant-post-toolbar .text-button-inline{flex-shrink:0}.assistant-post-toolbar .source-trigger{margin-left:auto}.topbar .ghost-button.ghost-button-inline{border:0;border-radius:6px;background:transparent;color:var(--text-muted);padding:6px 10px}.topbar .ghost-button.ghost-button-inline:hover{background:var(--panel-muted);color:var(--text-soft)}.assistant-post-toolbar .text-button.text-button-inline{border:0;border-radius:6px;background:transparent;color:var(--text-muted);padding:6px 10px;font-weight:500}.assistant-post-toolbar .text-button.text-button-inline:hover:not(:disabled){background:var(--panel-muted);color:var(--text-soft)}.assistant-post-toolbar .text-button.text-button-inline:disabled{background:transparent}.source-trigger{display:inline-flex;align-items:center;justify-content:space-between;gap:10px;width:auto;max-width:min(280px,100%);padding:6px 10px;border:0;border-radius:6px;background:transparent;cursor:pointer;font:inherit;text-align:left;color:var(--text-muted);transition:background .14s ease,color .14s ease}.source-trigger:hover{background:var(--panel-muted);color:var(--text-soft)}.source-trigger:focus-visible{outline:2px solid rgba(16,163,127,.35);outline-offset:2px}.source-trigger-lead{display:flex;align-items:center;gap:10px;min-width:0}.source-trigger-icon{width:6px;height:6px;flex:0 0 auto;border-radius:1px;background:var(--green);opacity:.9}.source-trigger-title{font-size:.84rem;font-weight:500;color:inherit;white-space:nowrap}.source-trigger-meta{flex:0 0 auto;display:flex;align-items:center;gap:8px;font-size:.76rem;font-weight:500;color:inherit;opacity:.92}.source-trigger-chevron{width:7px;height:7px;margin-top:-2px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(-45deg);flex-shrink:0;opacity:.55}.source-score-pill{display:inline-flex;align-items:center;padding:2px 7px;border-radius:4px;font-size:.72rem;font-weight:600;color:var(--text-soft);background:var(--panel-muted);border:1px solid var(--line)}.sources-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:90;display:none;align-items:stretch;justify-content:flex-end;background:rgba(17,24,39,.28)}.sources-backdrop.open{display:flex}.sources-drawer{width:min(440px,100vw);max-width:100%;height:100%;min-height:0;display:flex;flex-direction:column;background:#fff;box-shadow:-16px 0 48px #1118271f;animation:sources-drawer-enter .26s cubic-bezier(.22,1,.36,1)}@keyframes sources-drawer-enter{0%{transform:translate(100%)}to{transform:translate(0)}}.sources-drawer-header{flex:0 0 auto;padding:18px 20px 16px;border-bottom:1px solid var(--line)}.sources-drawer-top{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.sources-drawer-eyebrow{margin:0 0 4px;font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted)}.sources-drawer-header h3{margin:0;font-size:1.05rem;font-weight:600;color:var(--text)}.sources-drawer-sub{margin:8px 0 0;max-width:42ch;font-size:.82rem;line-height:1.5;color:var(--text-muted)}.sources-drawer-close{flex-shrink:0}.sources-drawer .ghost-button.sources-drawer-close{border:0;border-radius:6px;background:transparent;color:var(--text-muted);padding:6px 10px;font-size:.84rem}.sources-drawer .ghost-button.sources-drawer-close:hover{background:var(--panel-muted);color:var(--text-soft)}.sources-drawer-scroll{flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:16px 18px 28px}.sources-file-group{margin-bottom:10px;border:1px solid var(--line);border-radius:6px;background:#fff;overflow:hidden}.sources-file-group:last-child{margin-bottom:0}.sources-file-summary{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;width:100%;padding:12px 14px;margin:0;cursor:pointer;border:0;background:transparent;font:inherit;text-align:left;-webkit-user-select:none;user-select:none}.sources-file-summary:focus-visible{outline:2px solid rgba(16,163,127,.35);outline-offset:-2px}.sources-file-name{flex:1;min-width:0;font-size:.88rem;font-weight:600;line-height:1.4;color:var(--text);word-break:break-word}.sources-file-toolbar{flex:0 0 auto;display:flex;align-items:center;gap:8px}.sources-file-badge{font-size:.72rem;font-weight:600;color:var(--text-muted);white-space:nowrap}.sources-file-chevron{display:block;width:7px;height:7px;margin-top:4px;border-right:2px solid var(--text-muted);border-bottom:2px solid var(--text-muted);transform:rotate(45deg);transition:transform .18s ease;opacity:.8}.sources-file-group.is-open>.sources-file-summary .sources-file-chevron{margin-top:6px;transform:rotate(-135deg)}.sources-file-body{padding:0 12px 14px;border-top:1px solid var(--line);background:rgba(255,255,255,.55)}.sources-chunk{padding:12px 0}.sources-chunk+.sources-chunk{border-top:1px dashed var(--line)}.sources-chunk-head{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:8px}.sources-chunk-label{font-size:.72rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--text-muted)}.sources-chunk-excerpt{margin:0;padding:10px 12px;border-radius:4px;background:var(--panel-softer);border:1px solid var(--line);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:.82rem;line-height:1.55;white-space:pre-wrap;word-break:break-word;color:var(--text-soft)}.sources-chunk-link{margin-top:8px}.sources-file-link{display:inline-block;margin-top:4px}.sources-drawer-empty{margin:0;font-size:.82rem;color:var(--text-muted)}.sources-drawer-link{display:inline-block;font-size:.8rem;font-weight:600;color:var(--green);text-decoration:none}.sources-drawer-link:hover{text-decoration:underline}.follow-up-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.follow-up-chip{border:1px solid var(--line);border-radius:999px;padding:9px 14px;background:#fff;color:var(--text-soft);cursor:pointer;font-size:.84rem}.text-button{padding:7px 10px;border-radius:10px;font-size:.84rem}.text-button:disabled{opacity:.45;cursor:not-allowed}.chat-footer{padding:8px 24px 20px;background:linear-gradient(180deg,rgba(255,255,255,0),#ffffff 30%);flex:0 0 auto;transition:transform .2s ease;will-change:transform}.chat-stage.is-empty .chat-footer{position:static;padding-top:0;background:transparent}.status-bar{width:min(var(--chat-max-width),100%);margin:0 auto 6px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:.78rem}.status-bar p{margin:0}.status-bar p.quiet,.status-bar span.quiet{opacity:0}.composer{width:min(var(--chat-max-width),100%);margin:0 auto;display:flex;flex-direction:column;gap:6px;padding:8px 12px 9px;border:1px solid var(--line);border-radius:12px;background:#fafafa;box-shadow:0 0 0 1px #fffc inset,0 1px 2px #1118270a,0 6px 20px #1118270d;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease}.composer:focus-within{border-color:var(--line-strong);background:#fff;box-shadow:0 0 0 1px #ffffffe6 inset,0 1px 2px #1118270d,0 8px 28px #11182712}.composer-topline{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:.75rem;color:var(--text-muted);letter-spacing:.01em}.composer-topline p{margin:0}.composer textarea,.settings-field input{width:100%;border:0;padding:0;background:transparent;color:var(--text)}.composer textarea{min-height:72px;resize:none;font-family:var(--font-chat-body);font-size:.9375rem;line-height:1.6;font-weight:400;letter-spacing:0;color:var(--text-chat)}.composer textarea::placeholder,.settings-field input::placeholder{color:#9ca3af;opacity:.92}.composer textarea:focus,.settings-field input:focus{outline:none}.composer-actions,.composer-hints,.composer-controls{display:flex;align-items:center;gap:8px}.composer-actions{justify-content:space-between}.composer-hints .icon-button[data-tooltip]{position:relative;z-index:0}.composer-hints .icon-button[data-tooltip]:hover,.composer-hints .icon-button[data-tooltip]:focus-visible{z-index:30}.composer-hints .icon-button[data-tooltip]:after{content:attr(data-tooltip);position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);padding:7px 11px;max-width:min(240px,calc(100vw - 32px));width:max-content;box-sizing:border-box;font-size:.76rem;font-weight:500;line-height:1.35;text-align:center;white-space:normal;color:#f9fafb;background:#1f2937;border-radius:9px;box-shadow:0 4px 16px #0f172a2e;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .14s ease,visibility .14s ease}.composer-hints .icon-button[data-tooltip]:hover:after,.composer-hints .icon-button[data-tooltip]:focus-visible:after{opacity:1;visibility:visible}.icon-button,.send-button{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:999px;border:1px solid transparent;background:transparent;color:var(--text-muted);cursor:pointer}.icon-button svg,.send-button svg{width:17px;height:17px}.icon-button svg.icon-stroke path,.icon-button svg.icon-stroke circle,.ghost-button-inline svg.icon-stroke path,.ghost-button-inline svg.icon-stroke circle{fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}.icon-button:hover,.icon-button-strong{background:var(--panel-muted);color:var(--text)}.send-button{background:#111827;color:#fff;box-shadow:0 1px 2px #0000001f}.send-button:hover:not(:disabled){background:#000;box-shadow:0 2px 6px #0000002e}.send-button:disabled{cursor:not-allowed;opacity:.45}.settings-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;display:none;background:rgba(17,24,39,.36)}.settings-backdrop.open{display:block}.settings-drawer{position:absolute;top:20px;right:20px;width:min(380px,calc(100vw - 32px));max-height:min(640px,calc(100vh - 40px));display:flex;flex-direction:column;padding:0;border-radius:18px;border:1px solid var(--line);background:#fff;box-shadow:0 24px 64px #11182724;overflow:hidden}.settings-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 18px 16px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,var(--panel-softer) 0%,#fff 100%);flex-shrink:0}.settings-header-text{min-width:0}.settings-eyebrow{margin:0 0 4px;font-size:.72rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted)}.settings-header h3{margin:0;font-size:1.12rem;font-weight:650;letter-spacing:-.02em;color:var(--text)}.settings-close{display:grid;place-items:center;width:38px;height:38px;padding:0;border:0;border-radius:12px;background:transparent;color:var(--text-muted);cursor:pointer;flex-shrink:0}.settings-close:hover{color:var(--text);background:var(--panel-muted)}.settings-close:focus-visible{outline:2px solid rgba(16,163,127,.4);outline-offset:2px}.settings-close-icon{width:18px;height:18px}.settings-close svg.icon-stroke path{fill:none;stroke:currentColor;stroke-width:1.85;stroke-linecap:round}.settings-body{padding:16px 18px 20px;overflow-y:auto;overscroll-behavior:contain}.settings-block{margin-bottom:16px}.settings-block:last-child{margin-bottom:0}.settings-block--muted{padding:14px 14px 12px;border-radius:14px;background:var(--panel-muted);border:1px solid var(--line)}.settings-block-title{margin:0 0 12px;font-size:.78rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--text-muted)}.settings-field{display:flex;flex-direction:column;gap:8px;margin-bottom:0}.settings-block .settings-field+.settings-field{margin-top:12px}.settings-field .settings-label{font-size:.84rem;font-weight:600;color:var(--text-soft)}.settings-field input[type=text]{width:100%;border:1px solid var(--line);border-radius:12px;padding:11px 14px;background:#fff;font-size:.92rem;color:var(--text);transition:border-color .15s ease,box-shadow .15s ease}.settings-field input[type=text]::placeholder{color:var(--text-muted)}.settings-field input[type=text]:hover{border-color:var(--line-strong)}.settings-field input[type=text]:focus{outline:none;border-color:#10a37f8c;box-shadow:0 0 0 3px #10a37f1f}.checkbox-field{flex-direction:row;align-items:flex-start;gap:12px;cursor:pointer}.checkbox-field span{flex:1;min-width:0;padding-top:2px;font-size:.9rem;line-height:1.45;color:var(--text-soft);font-weight:500}.checkbox-field input[type=checkbox]{width:18px;height:18px;margin:2px 0 0;flex-shrink:0;accent-color:var(--green);cursor:pointer}@media (max-width: 980px){html{height:100%}body{height:100%;overscroll-behavior:none}#app{height:100dvh;max-height:100dvh;overflow:hidden;display:flex;flex-direction:column;min-height:0}.app-shell{display:block;position:relative;flex:1 1 auto;min-height:0;width:100%;height:100%;max-height:100%;overflow:hidden}.sidebar{position:fixed;top:0;left:0;bottom:0;width:min(88vw,300px);max-width:min(88vw,300px);height:100dvh;max-height:100dvh;min-height:0;z-index:40;transform:translate(-100%);transition:transform .22s cubic-bezier(.22,1,.36,1);box-shadow:none;overflow:hidden}.app-shell.is-mobile-sidebar-open .sidebar{transform:translate(0);box-shadow:12px 0 40px #00000059}.sidebar-mobile-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:35;background:rgba(0,0,0,.45);animation:sidebar-backdrop-in .2s ease}@keyframes sidebar-backdrop-in{0%{opacity:0}to{opacity:1}}.sidebar.is-collapsed{align-items:stretch;padding:14px 10px 12px;width:min(88vw,300px);max-width:min(88vw,300px)}.sidebar.is-collapsed .brand-name,.sidebar.is-collapsed .brand-row>div:last-child,.sidebar.is-collapsed .sidebar-section-label,.sidebar.is-collapsed .new-session-button span,.sidebar.is-collapsed .sidebar-footer-button span{display:revert}.sidebar.is-collapsed .session-list{display:flex}.sidebar.is-collapsed .brand-row{justify-content:flex-start}.sidebar.is-collapsed .new-session-button{justify-content:flex-start;padding:11px 14px}.sidebar.is-collapsed .sidebar-footer-button{justify-content:flex-start;padding:9px 10px}.app-shell.is-sidebar-collapsed{--sidebar-w: 264px}.main-panel{margin-left:0;width:100%;height:100%;max-height:100%;min-height:0;overflow:hidden;display:flex;flex-direction:column}.topbar-menu-btn{display:grid;place-items:center;flex-shrink:0;width:44px;height:44px;margin:0 0 0 -6px;padding:0;border:0;border-radius:10px;background:transparent;color:var(--text-soft);cursor:pointer}.topbar-menu-btn:hover{background:var(--panel-muted);color:var(--text)}.topbar-menu-icon{width:20px;height:20px}.topbar-menu-btn svg.icon-stroke path{fill:none;stroke:currentColor;stroke-width:1.85;stroke-linecap:round}:root{--chat-footer-pad-x: 12px}.topbar{flex-direction:row;align-items:center;gap:8px;padding:10px 12px;padding-top:calc(10px + env(safe-area-inset-top,0px))}.topbar-actions{flex-direction:row;align-items:center;flex-shrink:0;gap:6px}.health-pill span:not(.health-dot){display:none}.health-pill{padding:8px;min-width:44px;min-height:44px;justify-content:center}.ghost-button-inline span{display:none}.ghost-button-inline{min-width:44px;min-height:44px;padding:0;justify-content:center}.message-list{padding-left:var(--chat-footer-pad-x);padding-right:var(--chat-footer-pad-x);padding-bottom:16px}.message-row{width:100%;max-width:100%;padding-top:18px}.message-row.is-assistant{gap:0}.message-row.is-assistant .message-avatar{display:none}.message-row.is-assistant .message-card{max-width:100%}.message-content{font-size:.95rem;line-height:1.7}.assistant-post-toolbar{flex-direction:column;align-items:stretch;gap:8px;margin-top:12px}.assistant-post-toolbar .source-trigger{margin-left:0;width:100%;max-width:none;min-height:44px;padding:10px 12px;box-sizing:border-box}.assistant-post-toolbar .text-button.text-button-inline{width:100%;min-height:44px;padding:10px 12px;justify-content:flex-start;box-sizing:border-box}.status-bar{flex-direction:row;align-items:center;margin-bottom:4px}.composer-actions{flex-direction:row;align-items:center}.empty-stage{padding:16px var(--chat-footer-pad-x) 8px}.empty-grid{grid-template-columns:1fr}.chat-footer{padding:6px var(--chat-footer-pad-x) calc(12px + env(safe-area-inset-bottom,0px))}.chat-footer.is-keyboard-open{background:#fff}.composer{gap:4px;padding:6px 10px 8px}.composer.is-mobile textarea{min-height:48px;font-size:1rem;line-height:1.55}.composer-hints .icon-button[data-tooltip]:after{display:none}.composer-hints,.composer-controls{justify-content:space-between}.icon-button,.send-button,.session-action-btn{width:44px;height:44px}.settings-drawer{top:auto;right:0;left:0;bottom:0;width:100%;max-width:100%;max-height:min(85dvh,calc(100dvh - env(safe-area-inset-top,0px)));border-radius:18px 18px 0 0}.settings-backdrop.open{display:flex;align-items:flex-end}.sources-drawer{width:100vw;max-width:100vw}.sources-drawer .ghost-button.sources-drawer-close{min-height:44px;padding:10px 14px}}