:root{--primary:var(--brand-primary);--primary-active:var(--brand-primary-active);--accent-teal:#5db8a6;--accent-amber:#e8a55a;--canvas:#faf9f5;--surface-soft:#f5f0e8;--surface-card:#efe9de;--surface-dark:#181715;--surface-dark-elevated:#252320;--hairline:#e6dfd8;--ink:#141413;--body:#3d3d3a;--muted:#6c6a64;--muted-soft:#8e8b82;--on-dark:#faf9f5;--on-dark-soft:#a09d96}*{box-sizing:border-box}body,html{margin:0;height:100%;font-family:Outfit,system-ui,sans-serif;color:var(--body)}#app,body,html{background:var(--canvas)}#app{display:flex;height:100vh;overflow:hidden}#sheet-pane{flex:1;display:flex;flex-direction:column;min-width:0}#titlebar{height:44px;justify-content:space-between;padding:0 16px;background:var(--surface-soft);border-bottom:1px solid var(--hairline)}#chat-head .brand,#titlebar,#titlebar .brand{display:flex;align-items:center;color:var(--ink)}#chat-head .brand,#titlebar .brand{font-weight:700;font-size:15px;gap:8px}#chat-head .logo,#titlebar .logo{color:var(--primary)}.title-actions{display:flex;align-items:center;gap:8px}.save-status{font-size:12px;font-weight:600;color:var(--muted,#6c6a64);padding:3px 9px;border-radius:999px;white-space:nowrap;display:inline-flex;align-items:center;gap:5px;line-height:1;background:var(--surface-soft,#f2efe9)}.save-status:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.8}.save-status[data-state=saved]{color:#2f7d4f}.save-status[data-state=saving]{color:#8a6d3b}.save-status[data-state=unsaved]{color:#6c6a64}.save-status[data-state=error]{color:#c0392b}.title-credit{display:flex;align-items:center;margin-left:2px}.title-btn{background:var(--canvas);border:1px solid var(--hairline);color:var(--ink);padding:6px 12px;border-radius:8px;font-family:inherit;font-size:13px;cursor:pointer;font-weight:600;display:inline-flex;align-items:center;gap:6px;line-height:1}a.title-btn{text-decoration:none}.title-btn:hover{background:var(--surface-soft)}.title-btn.primary{background:#D04423;border-color:#D04423;color:#faf9f5}.title-btn.primary:hover{background:#b23a1d;border-color:#b23a1d}.menu-wrap{position:relative}.title-menu{position:absolute;right:0;top:110%;background:var(--canvas);border:1px solid var(--hairline);border-radius:8px;box-shadow:0 8px 24px rgba(20,20,19,.14);min-width:190px;padding:5px;display:none;z-index:9999}.title-menu.open{display:block}.title-menu button{display:block;width:100%;text-align:left;border:none;background:none;padding:9px 12px;border-radius:6px;font-family:inherit;font-size:13px;color:var(--body);cursor:pointer}.title-menu button:hover{background:var(--surface-soft)}.univer-formula-help-function{display:none!important}#ribbon{background:var(--surface-soft);-webkit-user-select:none;-moz-user-select:none;user-select:none}#ribbon,#ribbon-tabs{border-bottom:1px solid var(--hairline)}#ribbon-tabs{display:flex;gap:2px;padding:0 8px;background:var(--canvas)}.rb-tab{background:none;padding:9px 14px 8px;font-family:inherit;font-size:13px;color:var(--muted);cursor:pointer;border:none;border-bottom:3px solid transparent;font-weight:500}.rb-tab:hover{background:var(--surface-soft)}.rb-tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}#ribbon-body{display:flex;align-items:stretch;gap:0;padding:4px 4px 2px;min-height:88px;overflow-x:auto}.rb-group{display:flex;flex-direction:column;padding:2px 8px 0;border-right:1px solid var(--hairline)}.rb-row{display:flex;align-items:center;gap:2px;flex-wrap:wrap;max-width:268px;flex:1;align-content:flex-start}.rb-glabel{text-align:center;font-size:11px;color:var(--muted-soft);padding:3px 0 2px}.rb-btn{min-width:26px;height:26px;padding:0 5px;border:1px solid transparent;border-radius:4px;background:none;color:var(--body);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:5px;font-family:inherit;font-size:13px}.rb-btn:hover{background:var(--surface-soft);border-color:var(--hairline)}.rb-btn:active{background:var(--surface-card)}.rb-btn-lg{flex-direction:column;height:auto;min-width:52px;padding:5px 7px;gap:3px}.rb-lbl{font-size:11px;color:var(--muted)}.rb-txt{font-size:14px;width:16px;text-align:center;display:inline-block}.rb-txt.b{font-weight:800}.rb-txt.i{font-style:italic;font-family:Georgia,serif}.rb-txt.u{text-decoration:underline}.rb-txt.s{text-decoration:line-through}.rb-txt.big{font-size:16px}.rb-txt.small{font-size:11px}.rb-select{height:26px;border:1px solid var(--hairline);border-radius:4px;background:var(--canvas);font-family:inherit;font-size:12px;padding:0 4px;color:var(--body);cursor:pointer}.rb-color{position:relative;flex-direction:column}.rb-colorface{font-size:13px;line-height:1}.rb-color input[type=color]{position:absolute;inset:0;opacity:0;cursor:pointer}#fr-panel{position:fixed;top:150px;right:400px;width:240px;background:var(--canvas);z-index:9998;border:1px solid var(--hairline);border-radius:10px;box-shadow:0 8px 30px rgba(20,20,19,.16);padding:12px;font-size:13px;display:flex;flex-direction:column;gap:8px}#fr-panel .fr-head{display:flex;justify-content:space-between;align-items:center;font-weight:600;color:var(--ink)}#fr-panel .fr-x{border:none;background:none;cursor:pointer;color:var(--muted-soft);font-size:14px}#fr-panel .fr-find,#fr-panel .fr-rep,#fr-panel input[type=text]{border:1px solid var(--hairline);border-radius:6px;padding:7px 8px;font-family:inherit;font-size:13px;background:var(--canvas);color:var(--ink)}#fr-panel .fr-case{font-size:12px;color:var(--muted);align-items:center}#fr-panel .fr-btns,#fr-panel .fr-case{display:flex;gap:6px}#fr-panel .fr-btns button{flex:1;border:1px solid var(--primary);background:var(--primary);color:var(--on-dark);border-radius:6px;padding:7px;cursor:pointer;font-family:inherit;font-size:12px;font-weight:600}#fr-panel .fr-btns button.fr-count{background:var(--canvas);color:var(--primary)}#fr-panel .fr-status{font-size:12px;color:var(--muted);min-height:14px}#rb-toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--surface-dark);color:var(--on-dark);padding:9px 16px;border-radius:8px;font-size:13px;opacity:0;transition:all .2s;pointer-events:none;z-index:9999}#rb-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}#univer{flex:1;min-height:0}#pane-resizer{width:6px;flex-shrink:0;cursor:col-resize;background:transparent;border-right:1px solid var(--hairline);position:relative;z-index:5;transition:background .15s}#pane-resizer:active,#pane-resizer:hover{background:rgba(0,0,0,.14)}#chat-pane{width:380px;flex-shrink:0;display:flex;flex-direction:column;background:var(--canvas);color:var(--body)}#chat-head{position:relative;height:52px;display:flex;align-items:center;justify-content:space-between;padding:0 12px;border-bottom:1px solid var(--hairline);font-weight:600}#settings-btn{background:none;border:none;color:var(--muted-soft);font-size:16px;cursor:pointer}#settings-btn:hover{color:var(--ink)}#chat-head .chat-name-input,#titlebar .chat-name-input{flex:1;min-width:0;height:32px;margin-right:8px;padding:0 8px;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--ink);font-family:inherit;font-size:14px;font-weight:600;cursor:text;text-overflow:ellipsis}#chat-head .chat-name-input:hover,#titlebar .chat-name-input:hover{background:var(--surface-soft)}#chat-head .chat-name-input:focus,#titlebar .chat-name-input:focus{outline:none;background:var(--canvas);border-color:var(--primary);font-weight:500}#chat-head .chat-head-actions{display:flex;align-items:center;gap:6px;flex-shrink:0}#chat-head .chat-icon-btn{width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;padding:0;border:1px solid var(--hairline);border-radius:8px;background:var(--canvas);color:var(--body);font-size:15px;line-height:1;cursor:pointer}#chat-head .chat-icon-btn:hover{background:var(--surface-soft)}#chat-head #new-chat{font-size:20px;font-weight:400;color:var(--primary)}.chat-history-menu{position:absolute;top:48px;right:12px;left:auto;z-index:40;width:240px;max-height:320px;overflow-y:auto;padding:6px;background:var(--canvas);border:1px solid var(--hairline);border-radius:10px;box-shadow:0 8px 24px rgba(20,20,19,.12)}.chat-history-menu[hidden]{display:none}.chat-menu-row{display:block;width:100%;text-align:left;padding:8px 10px;border:none;background:none;border-radius:8px;cursor:pointer;font-family:inherit;font-size:13px;color:var(--body);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-menu-row:hover{background:var(--surface-soft)}.chat-menu-row.active{background:var(--surface-card);color:var(--primary);font-weight:600}.chat-menu-empty{padding:12px;text-align:center;color:var(--muted-soft);font-size:13px}#chat-body{flex:1;min-height:0;position:relative;display:flex}#messages{flex:1;overflow-y:auto;padding:16px;gap:12px}#chat-empty,#messages{display:flex;flex-direction:column}#chat-empty{position:absolute;inset:0;align-items:center;justify-content:center;gap:18px;padding:24px;text-align:center}#chat-empty[hidden]{display:none}.chat-empty-title{margin:0;font-size:20px;font-weight:700;color:var(--ink);letter-spacing:-.01em}.chat-empty-suggestions{display:flex;flex-direction:column;gap:8px;align-items:center;width:100%;max-width:300px}.chat-empty-suggestions .chip{width:100%;text-align:center}.msg.thinking{padding:12px 14px}.msg.thinking .typing{display:inline-flex;align-items:center;gap:4px}.msg.thinking .typing i{width:6px;height:6px;border-radius:50%;background:var(--muted-soft);display:inline-block;animation:typing-bounce 1.2s ease-in-out infinite}.msg.thinking .typing i:nth-child(2){animation-delay:.15s}.msg.thinking .typing i:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,60%,to{transform:translateY(0);opacity:.5}30%{transform:translateY(-4px);opacity:1}}.msg{padding:10px 12px;border-radius:12px;font-size:14px;line-height:1.5;max-width:90%;white-space:pre-wrap}.msg.user{align-self:flex-end;background:var(--primary);color:var(--on-dark);border-bottom-right-radius:3px}.msg.ai{align-self:flex-start;background:var(--surface-card);color:var(--ink);border-bottom-left-radius:3px}.msg.system{align-self:center;background:transparent;color:var(--muted);font-size:12px;text-align:center}.msg .ops{font-size:12px;color:var(--accent-teal)}.msg-foot{display:flex;align-items:center;gap:8px;margin-top:6px}.msg-foot .ops{flex:1;min-width:0}.msg-foot .msg-cost{margin-left:auto;font-size:11px;font-weight:600;color:var(--muted-soft);white-space:nowrap}.msg-foot .msg-cost:empty{display:none}#composer{margin:12px;padding:8px 10px;border:1px solid var(--hairline);border-radius:16px;background:var(--canvas);display:flex;flex-direction:column;gap:4px;box-shadow:0 1px 2px rgba(20,20,19,.03)}#composer:focus-within{border-color:var(--hairline)}#prompt{width:100%;resize:none;border:none;background:transparent;color:var(--ink);padding:6px 6px 0;font-family:inherit;font-size:14px;line-height:1.45;max-height:200px}#prompt:focus,#prompt:focus-visible{outline:none;box-shadow:none}.composer-row{display:flex;align-items:center;justify-content:flex-end;gap:8px;padding:0 2px}.composer-hint{font-size:12px;color:var(--muted-soft);white-space:nowrap}.composer-send{width:34px;height:34px;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:50%;background:var(--primary);color:var(--on-dark);cursor:pointer}.composer-send:hover{background:var(--primary-active)}.composer-send:focus,.composer-send:focus-visible{outline:none;box-shadow:none}.composer-send:disabled{background:var(--surface-card);color:var(--muted-soft);cursor:default}.composer-send .stop-ico{display:none}.composer-send.stop{background:var(--surface-dark)}.composer-send.stop:hover{background:var(--surface-dark-elevated)}.composer-send.stop .send-ico{display:none}.composer-send.stop .stop-ico{display:inline-flex}#suggestions{padding:0 12px 14px;display:flex;flex-wrap:wrap;gap:6px}.chip{font-size:12px;padding:6px 10px;border-radius:999px;cursor:pointer;background:var(--surface-soft);border:1px solid var(--hairline);color:var(--muted);font-family:inherit}.chip:hover{border-color:var(--primary);color:var(--ink)}dialog{border:none;border-radius:14px;padding:22px;max-width:380px;font-family:inherit;background:var(--canvas);color:var(--body)}dialog::backdrop{background:rgba(20,20,19,.4)}dialog h3{margin:0 0 6px;color:var(--ink)}dialog p{margin:0 0 12px;font-size:13px;color:var(--muted)}#key-input{width:100%;padding:10px;border:1px solid var(--hairline);border-radius:8px;font-family:inherit;background:var(--canvas);color:var(--ink)}#import-dialog{max-width:420px}#history-dialog{max-width:440px}#history-list{max-height:360px;overflow-y:auto;display:flex;flex-direction:column;gap:6px;margin:10px 0}.hist-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 12px;border:1px solid var(--hairline);border-radius:8px}.hist-item:hover{border-color:var(--primary);background:var(--surface-soft)}.hist-label{font-size:13px;font-weight:600;color:var(--ink)}.hist-when{font-size:12px;color:var(--muted-soft);margin-top:2px}.hist-restore{flex-shrink:0;border:1px solid var(--primary);background:var(--canvas);color:var(--primary);border-radius:6px;padding:5px 12px;font-family:inherit;font-size:12px;font-weight:600;cursor:pointer}.hist-restore:hover{background:var(--primary);color:var(--on-dark)}.hist-empty{color:var(--muted-soft);font-size:13px;text-align:center;padding:24px 0}#save-version-banner{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);display:none;align-items:center;gap:14px;z-index:9999;background:var(--surface-dark);color:var(--on-dark);padding:12px 16px;border-radius:12px;box-shadow:0 10px 30px rgba(20,20,19,.25);font-size:14px}#save-version-banner.show{display:flex;animation:svb-in .2s ease-out forwards}@keyframes svb-in{to{transform:translateX(-50%) translateY(0)}}.svb-actions{display:flex;gap:8px}#save-version-save{background:var(--primary);color:var(--on-dark);border:none;border-radius:8px;padding:7px 14px;font-family:inherit;font-size:13px;font-weight:600;cursor:pointer}#save-version-save:hover{background:var(--primary-active)}#save-version-dismiss{background:transparent;color:var(--on-dark-soft);border:1px solid var(--surface-dark-elevated);border-radius:8px;padding:7px 12px;font-family:inherit;font-size:13px;cursor:pointer}#save-version-dismiss:hover{background:rgba(250,249,245,.08)}.imp-opt{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--hairline);border-radius:8px;margin-bottom:8px;cursor:pointer}.imp-opt:hover{border-color:var(--primary);background:var(--surface-soft)}.imp-opt input{margin-top:3px}#import-dialog input[type=radio],.imp-opt input{accent-color:var(--accent-teal)}.imp-opt span{display:flex;flex-direction:column}.imp-opt b{color:var(--ink)}.imp-opt small{color:var(--muted);font-size:12px;margin-top:2px}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:14px}.dialog-actions button{padding:8px 14px;border-radius:8px;border:1px solid var(--hairline);background:var(--canvas);color:var(--ink);cursor:pointer;font-family:inherit}.dialog-actions button[value=import],.dialog-actions button[value=save]{background:var(--primary);color:var(--on-dark);border-color:var(--primary)}.dialog-actions button[value=import]:hover,.dialog-actions button[value=save]:hover{background:var(--primary-active)}.share-overlay{position:fixed;inset:0;z-index:2147483000;display:flex;align-items:center;justify-content:center;background:rgba(20,20,19,.45)}.share-modal{width:100%;max-width:440px;background:var(--canvas);border:1px solid var(--hairline);border-radius:18px;box-shadow:0 20px 60px rgba(20,20,19,.22);overflow:hidden;font-family:inherit}.share-head{justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--hairline)}.share-head,.share-title{display:flex;align-items:center}.share-title{gap:9px;font-size:15px;font-weight:700;color:var(--ink)}.share-title svg{color:var(--primary)}.share-x{border:none;background:none;cursor:pointer;color:var(--muted);display:flex;padding:4px;border-radius:6px}.share-x:hover{background:var(--surface-soft);color:var(--ink)}.share-loading{display:flex;align-items:center;gap:8px;padding:14px 0}.share-loading,.share-sub{color:var(--muted);font-size:13.5px}.share-sub{line-height:1.5;margin:0}.share-people{padding:16px 18px}.share-label{display:flex;align-items:center;gap:6px;font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted-soft);margin:0 0 7px}.share-inviterow{display:flex;gap:8px}.share-invite-email{flex:1;min-width:0;padding:10px 12px;border-radius:10px;border:1px solid var(--hairline);background:#fff;color:var(--ink);font-family:inherit;font-size:13px}.share-invite-email:focus{outline:none;border-color:var(--primary)}.share-collab-role,.share-invite-role{flex-shrink:0;padding:9px 6px;border-radius:10px;border:1px solid var(--hairline);background:#fff;color:var(--ink);font-family:inherit;font-size:12.5px;cursor:pointer}.share-collab-role:focus,.share-invite-role:focus{outline:none;border-color:var(--primary)}.share-invite-btn{flex-shrink:0;display:inline-flex;align-items:center;gap:6px;padding:10px 14px;border-radius:10px;border:none;background:var(--primary);color:var(--on-dark,#fff);font-family:inherit;font-size:13px;font-weight:600;cursor:pointer}.share-invite-btn:disabled{opacity:.55;cursor:default}.share-invite-msg{margin-top:8px;font-size:12.5px}.share-invite-msg.ok{color:var(--accent-teal,#5db8a6)}.share-invite-msg.err{color:#c0392b}.share-collab-list{margin-top:12px;display:flex;flex-direction:column;gap:8px}.share-collab{display:flex;align-items:center;gap:8px}.share-collab-email{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px;color:var(--ink)}.share-collab-x{flex-shrink:0;border:none;background:none;cursor:pointer;color:var(--muted-soft);display:flex;padding:5px;border-radius:6px}.share-collab-x:hover{background:var(--surface-soft);color:#c0392b}.ro-badge{display:inline-flex;align-items:center;gap:5px;margin-left:8px;padding:2px 8px;border-radius:999px;background:var(--surface-card);color:var(--muted);font-size:11.5px;font-weight:600}.ro-badge svg{color:var(--primary)}