*{box-sizing:border-box} :root{color-scheme:dark;--bg:#0d1117;--panel:#11171f;--border:#242e3a;--text:#e6edf3;--muted:#8b98a9;--accent:#83e4b6;--red:#ff9f9f}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{opacity:.4;cursor:not-allowed}button,input,textarea,select{border:1px solid var(--border);border-radius:9px}button{color:var(--text);background:#1b2530}input,textarea,select{background:#0c121a;color:var(--text);padding:11px 12px;outline:none}input:focus,textarea:focus,select:focus{border-color:var(--accent)}textarea{resize:vertical}button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}label{display:block;font-size:13px}label>input:not([type=checkbox]),label>select,label>textarea{display:block;width:100%;margin:7px 0 16px}.hidden{display:none!important}.muted{color:var(--muted)}.error{color:var(--red);white-space:pre-wrap}.primary{background:var(--accent);border-color:var(--accent);color:#10251b;font-weight:650;padding:12px 16px}.secondary,.danger{padding:9px 16px}.danger{color:var(--red)}.login-view{min-height:100dvh;display:grid;place-items:center;padding:24px;background:radial-gradient(ellipse at 50% 10%,#162d2a 0,transparent 60%)}.login-card{width:100%;max-width:390px;padding:38px 32px;border:1px solid #2a383c;border-radius:20px;background:#10171ded;box-shadow:0 20px 90px #0004}.brand-mark{display:grid;place-items:center;width:50px;height:50px;background:#1b352b;border:1px solid #335847;border-radius:13px;color:var(--accent);font-size:32px}.eyebrow{margin-top:26px;color:var(--accent);font-size:10px;letter-spacing:2px}.login-card h1{font-size:30px;line-height:1.2;margin:8px 0}.login-card>.muted{margin-bottom:30px}.login-card .primary{width:100%;display:flex;justify-content:space-between}.login-foot{text-align:center;color:var(--muted);font-size:11px;margin:28px 0 0}.app{height:100dvh;display:flex;overflow:hidden}.sidebar{width:288px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:24px 16px 16px;gap:15px}.brand{display:flex;align-items:center;gap:12px;padding:0 7px 12px;font-size:17px}.brand b{color:var(--accent);font-weight:500}.brand small{display:block;font-size:11px;color:var(--muted)}.brand-small{font-size:28px;color:var(--accent)}.new-task{padding:10px;background:#1d322b;color:var(--accent);border-color:#31483e;text-align:left}.search{width:100%;font-size:12px}.sidebar-label,.sidebar-bottom{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:11px;padding:0 6px}.text-button{padding:3px 6px;border:0;background:transparent;color:var(--muted);font-size:12px}.text-button:hover{color:var(--accent)}.thread-list{flex:1;overflow-y:auto;margin:0 -5px;padding:0 5px}.thread{display:block;text-align:left;width:100%;margin-bottom:5px;background:transparent;border:1px solid transparent;padding:11px 12px}.thread:hover{background:#1a232d}.thread.selected{background:#20312e;border-color:#3a574a}.thread-title{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.thread-meta{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin-top:4px;gap:10px}.thread-status.running{color:var(--accent)}.sidebar-bottom{padding-top:12px;border-top:1px solid var(--border)}.main{min-width:0;flex:1;display:flex;flex-direction:column}.topbar{height:79px;flex-shrink:0;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px;padding:0 30px}.heading{min-width:0;flex:1}.heading h1{font-size:16px;line-height:1.5;margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.heading p{font-size:11px;color:var(--muted);margin:3px 0 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.connection{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:11px;white-space:nowrap}.connection i{height:6px;width:6px;border-radius:50%;background:#778493}.connection.online{color:var(--accent)}.connection.online i{background:var(--accent);box-shadow:0 0 10px #83e4b640}.toolbar{padding:9px 30px;display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:11px;flex-shrink:0;gap:10px}.toolbar>div{display:flex;align-items:center;gap:12px}.activity-toggle{font-size:11px;display:flex;align-items:center;gap:4px}.activity-toggle input{accent-color:var(--accent)}.conversation{flex:1;overflow-y:auto;padding:24px max(30px,calc((100% - 820px)/2));scrollbar-width:thin;overflow-anchor:none}.empty{text-align:center;color:var(--muted);margin-top:12vh}.empty>div{font-size:46px;color:#5c8a74}.empty h2{font-size:20px;color:#c3d0d9;font-weight:500}.empty p{font-size:13px;line-height:2}.message{margin-bottom:27px;max-width:100%;overflow-wrap:anywhere}.message.user{margin-left:8%;padding:15px 19px;background:#1b2a29;border:1px solid #2b423b;border-radius:15px 15px 4px 15px}.message.agent{padding:2px 0 5px}.message-label{font-size:10px;color:var(--muted);letter-spacing:.8px;margin-bottom:8px;display:flex;align-items:center;gap:8px}.message-label.agent-label{color:var(--accent)}.message-text{font-size:14px;line-height:1.9;white-space:pre-wrap;overflow-wrap:anywhere}.message-text p{margin:8px 0}.message-text h2,.message-text h3,.message-text h4{line-height:1.5;font-size:17px;margin:20px 0 10px}.message-text pre,.activity pre{overflow:auto;background:#080d12;border:1px solid #25313e;border-radius:8px;padding:13px;font:12px/1.65 ui-monospace,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere}.message-text code{background:#202c36;padding:2px 4px;border-radius:4px;font:12px/1.7 ui-monospace,Consolas,monospace}.message-text pre code{background:transparent;padding:0}.activity{margin:0 0 11px;border:1px solid #24303b;border-radius:8px;background:#111922;font-size:12px}.activity summary{padding:9px 12px;cursor:pointer;color:#a6b5c4;list-style:none;display:flex;gap:8px;align-items:center}.activity summary::before{content:'›';color:var(--accent);font-size:17px}.activity[open] summary::before{content:'⌄'}.activity-body{padding:0 12px 10px;overflow-wrap:anywhere}.activity pre{font-size:11px;max-height:400px;margin:6px 0}.activity-status{margin-left:auto;font-size:10px;color:var(--muted);white-space:nowrap}.activity.running{border-color:#355b48}.activity-label{font-size:10px;color:var(--muted);margin-top:8px}.progress-summary{color:var(--muted);font-size:11px;margin:6px 0 13px;padding-left:10px;border-left:2px solid #304738}.older{display:block;margin:0 auto 24px;padding:6px 14px;color:var(--muted);background:transparent;font-size:12px}.composer-area{padding:14px max(30px,calc((100% - 820px)/2)) 8px;border-top:1px solid #1b252f;background:var(--bg);flex-shrink:0}.composer{border:1px solid #33413f;border-radius:13px;background:#141e23;overflow:hidden}.composer:focus-within{border-color:#56836a}.composer textarea{background:transparent;width:100%;border:0;border-radius:0;resize:none;max-height:170px;padding:15px 16px 8px;font-size:14px}.composer-bottom{padding:0 10px 10px 15px;display:flex;align-items:center;gap:12px;justify-content:space-between}.composer-bottom>span{font-size:10px;color:var(--muted)}.send{padding:6px 14px;background:var(--accent);color:#112c20;font-size:12px;font-weight:650;border:0;white-space:nowrap}.footer-note{text-align:center;font-size:10px;color:#677584;margin:6px 0}.banner{padding:9px 24px;background:#342923;color:#edc499;font-size:12px}.icon{padding:4px 8px;background:transparent;border:0;font-size:20px}.mobile-only{display:none}.toast{position:fixed;z-index:30;bottom:26px;left:50%;transform:translateX(-50%);max-width:90vw;width:max-content;padding:12px 18px;background:#29382f;border:1px solid #46644f;border-radius:10px;color:#e8f7eb;box-shadow:0 5px 25px #0005;font-size:12px}dialog{width:min(480px,calc(100vw - 30px));background:var(--panel);color:var(--text);border:1px solid #384753;border-radius:15px;padding:25px}dialog::backdrop{background:#0009}dialog h2{margin-top:0;font-size:21px}dialog .muted{font-size:12px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}.dialog-actions .primary{padding:9px 16px}#passwordForm>.primary{width:100%}.backdrop{position:fixed;inset:0;z-index:19;background:#0008;border:0;border-radius:0}.list-empty{padding:20px;color:var(--muted);font-size:12px}.copy{font-size:10px;margin-left:auto;padding:1px 5px;background:transparent;border:0;color:var(--muted)}@media(max-width:760px){.sidebar{position:fixed;top:0;bottom:0;left:0;z-index:20;width:min(310px,85vw);transform:translateX(-100%);transition:transform .18s}.sidebar.open{transform:translateX(0)}.mobile-only{display:block}.brand #closeMenu{margin-left:auto}.topbar{padding:0 14px;height:70px;gap:8px}.heading h1{font-size:14px}.heading p{max-width:52vw}.connection{font-size:10px;gap:5px}.toolbar{padding:7px 15px}.toolbar>div{gap:5px}.conversation{padding:18px 17px}.composer-area{padding:10px 12px max(7px,env(safe-area-inset-bottom))}.composer textarea{font-size:16px}.composer-bottom>span{font-size:9px}.footer-note{font-size:9px}.message.user{margin-left:5%;padding:12px 14px}.message-text{font-size:14px}.empty{margin-top:10vh}.login-card{padding:30px 25px}.banner{padding:8px 15px}.activity-toggle{font-size:10px}#syncTime{font-size:10px}.message-label{font-size:9px}.heading{overflow:hidden}}
@media(max-width:760px){.sidebar{visibility:hidden}.sidebar.open{visibility:visible}}

/* Mobile v2: compact controls, real delivery receipts, accessible color modes. */
#themeSelect{padding:4px 6px;font-size:11px;max-width:100px;flex-shrink:0}.toolbar{flex-wrap:wrap}#syncTime{flex:1;min-width:70px}
.composer-settings{display:flex;align-items:flex-end;gap:9px;padding:10px 12px 0}.composer-settings label{font-size:10px;color:var(--muted);min-width:0;flex:1}.composer-settings label:first-child{flex:1.8}.composer-settings select{width:100%;margin:2px 0 0;padding:5px 6px;font-size:12px;height:33px}.attach-button{height:33px;white-space:nowrap;padding:4px 9px;font-size:12px}.receipt-status{font-size:11px;color:var(--muted);margin-top:10px;overflow-wrap:anywhere}.receipt-status.executing,.receipt-status.recorded{color:var(--accent)}.receipt-status.failed,.receipt-status.unknown{color:var(--red)}.receipt-status button{margin-left:8px}
.attachment-preview,.message-images{display:flex;gap:8px;flex-wrap:wrap}.attachment-preview:not(:empty){padding:10px 12px 0}.attachment-preview>div{position:relative}.attachment-preview img{width:58px;height:58px;border-radius:7px;object-fit:cover;border:1px solid var(--border)}.attachment-preview button{position:absolute;right:-5px;top:-6px;border-radius:50%;font-size:14px;padding:0 5px;background:var(--panel)}.message-images{margin-top:10px}.message-images img{width:120px;max-height:160px;object-fit:contain;border-radius:8px;background:var(--panel);cursor:zoom-in}.image-dialog{width:min(960px,95vw);max-height:95dvh;padding:12px}.image-dialog img{display:block;width:100%;max-height:80dvh;object-fit:contain;margin-bottom:10px}
:root[data-theme=light]{color-scheme:light;--bg:#f5f7fa;--panel:#fff;--border:#dce3e9;--text:#20303d;--muted:#617282;--accent:#127a51;--red:#b53434}
[data-theme=light] button{background:#eaf0f4}[data-theme=light] input,[data-theme=light] textarea,[data-theme=light] select{background:#fff;color:var(--text)}[data-theme=light] .primary,[data-theme=light] .send{background:#147a53;color:#fff}[data-theme=light] .login-view{background:radial-gradient(ellipse at top,#e3f3eb,transparent 65%)}[data-theme=light] .login-card{background:#ffffffed;border-color:var(--border);box-shadow:0 20px 90px #18372b12}[data-theme=light] .brand-mark,[data-theme=light] .new-task{background:#e7f5ed;border-color:#c1decc}[data-theme=light] .thread{background:transparent}[data-theme=light] .thread:hover{background:#edf2f6}[data-theme=light] .thread.selected{background:#e4f3ec;border-color:#b8d6c7}[data-theme=light] .message.user{background:#e7f3ed;border-color:#cee3d7}[data-theme=light] .message-text pre,[data-theme=light] .activity pre{background:#f0f3f6;border-color:var(--border)}[data-theme=light] .message-text code{background:#e6ebef}[data-theme=light] .message-text pre code{background:transparent}[data-theme=light] .activity{background:#fff;border-color:var(--border)}[data-theme=light] .activity summary{color:#40596d}[data-theme=light] .composer{background:#fff;border-color:#c6d7cd}[data-theme=light] .composer textarea{background:transparent}[data-theme=light] .composer-area{border-color:var(--border)}[data-theme=light] .banner{background:#fff2db;color:#775216}[data-theme=light] .empty h2{color:var(--text)}[data-theme=light] .text-button,[data-theme=light] .icon,[data-theme=light] .copy,[data-theme=light] .older{background:transparent}[data-theme=light] .toast{background:#e5f3e9;border-color:#a1c5ac;color:#25482e}[data-theme=light] .backdrop{background:#20303d60}
@media(max-width:760px){.composer-settings{gap:6px;padding:8px 9px 0}.composer-settings select{font-size:12px;padding:4px}.toolbar{gap:6px}#syncTime{font-size:9px}.toolbar>div{margin-left:auto}.composer-bottom{gap:5px}.composer-bottom>span{max-width:calc(100% - 65px)}.message-images img{width:95px}.composer textarea{max-height:120px}.footer-note{margin:3px 0}}