:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#243638;background:#eff3f2;font-synthesis:none;--ink:#193d40;--green:#086b62;--line:#dce4e1;--muted:#677a79;--pale:#e7f2ed;--accent:#c6e778;--paper:#fff}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,summary,select{touch-action:manipulation}button{cursor:pointer}button,.top a{min-height:42px}button{border:1px solid var(--line);border-radius:9px;background:white;color:var(--ink);padding:9px 13px;font-weight:650}button:hover{background:#edf5ee}button:disabled{opacity:.5;cursor:not-allowed}.primary{background:var(--ink);border-color:var(--ink);color:white}.primary:hover{background:#25595a}.quiet{background:transparent}.full{width:100%}a{color:var(--green)}input,select,textarea{border:1px solid #cbd8d3;border-radius:9px;background:#fff;color:var(--ink);padding:10px;width:100%;min-height:42px}textarea{resize:vertical;line-height:1.5;max-height:240px}label{display:block;font-size:12px;font-weight:700;margin-bottom:7px}label input,label select{margin-top:5px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #69a797;outline-offset:3px}[hidden]{display:none!important}.top{height:88px;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:space-between;gap:15px;padding:17px 28px}.brand{display:flex;gap:17px;align-items:center;text-decoration:none;color:var(--ink)}.brand img{width:89px;height:48px;object-fit:contain}.brand>span{border-left:1px solid var(--line);padding-left:17px;font-weight:750;font-size:20px;letter-spacing:-.5px}.brand small{display:block;font-size:11px;font-weight:550;letter-spacing:0;margin-top:5px}.brand small b{font-size:9px;background:var(--accent);border-radius:5px;padding:3px 5px;margin-left:4px;text-transform:uppercase}.top nav{display:flex;align-items:center;gap:9px}.top nav a{display:flex;align-items:center;text-decoration:none;font-size:12px;font-weight:600;margin-right:9px}#app{display:grid;grid-template-columns:245px minmax(380px,1fr) 300px;max-width:1780px;margin:auto;min-height:calc(100dvh - 88px)}.sidebar{padding:27px 20px;display:flex;flex-direction:column;background:#f3f6f4;border-right:1px solid var(--line)}.sidebar-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:25px;gap:7px}.eyebrow,.section-label{text-transform:uppercase;letter-spacing:1.2px;font-size:10px;font-weight:750;color:var(--muted)}.badge{white-space:nowrap;font-size:9px;letter-spacing:0;text-transform:none;padding:4px 6px;background:#e2eae5;color:var(--ink);border-radius:5px}.profile{font-size:11px;line-height:1.6;margin:12px 0 21px;color:var(--muted)}.search-label{margin-top:26px}.section-label{display:flex;align-items:center;justify-content:space-between;margin:24px 0 13px}.section-label>span{font-size:10px}.topics{flex:1;min-height:180px}.topic-card{width:100%;text-align:left;border:0;background:none;border-radius:8px;padding:13px 10px;margin:4px 0;font-size:12px;line-height:1.5}.topic-card.active{background:var(--pale);box-shadow:inset 3px 0 var(--green)}.topic-card strong{display:block}.topic-card small{color:var(--muted);font-size:10px;font-weight:400}.sidebar-foot{display:flex;gap:7px;align-items:flex-start;font-size:10px;line-height:1.5;color:var(--muted);margin-top:24px}.status-dot{display:inline-block;flex:0 0 6px;width:6px;height:6px;border-radius:50%;background:#549886;margin-top:4px}.conversation{background:#fff;display:flex;flex-direction:column;min-width:0}.conversation-head{display:flex;justify-content:space-between;gap:15px;padding:27px 32px 20px;border-bottom:1px solid var(--line);align-items:center}.conversation-head h1{font-size:24px;letter-spacing:-.8px;line-height:1.2;margin:8px 0}.conversation-head p:last-child{font-size:11px;line-height:1.5;color:var(--muted);margin-bottom:0}.notice{margin:17px 30px 0;padding:12px 14px;border:1px solid #d4e7dd;background:#f1f7ef;border-radius:8px;font-size:11px;line-height:1.6}.welcome{margin:auto;padding:35px 35px 60px;max-width:580px;text-align:center}.big-mark{display:inline-grid;place-items:center;border-radius:19px;background:var(--accent);width:70px;height:70px;font-size:35px;color:var(--ink);transform:rotate(-6deg)}.welcome h2{font-size:31px;line-height:1.1;letter-spacing:-1.1px;margin:25px 0 16px}.welcome p{color:var(--muted);font-size:13px;line-height:1.8;max-width:330px;margin:0 auto}.welcome-steps{display:flex;justify-content:center;gap:15px;margin:33px 0;font-size:11px}.welcome-steps span{flex:1}.welcome-steps b{display:block;color:var(--green);margin-bottom:10px;font-size:10px}.welcome small{font-size:10px;line-height:1.7;color:var(--muted);display:block;margin:16px auto;max-width:300px}.messages{padding:20px 32px;flex:1;min-height:90px;max-height:55dvh;overflow:auto;overscroll-behavior:contain}.message{display:grid;grid-template-columns:33px 1fr;gap:10px;margin:8px 0 23px;padding:2px;border-radius:8px}.message:target,.message.highlight{background:#f2f7df}.avatar{width:32px;height:32px;display:grid;place-items:center;background:#e2ede8;color:var(--ink);border:1px solid #d3dfd7;border-radius:10px;font-size:11px;font-weight:750}.message-meta{display:flex;align-items:center;gap:9px;flex-wrap:wrap;font-size:11px}.message-meta time{font-size:9px;color:var(--muted)}.message-body{white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px;line-height:1.65;margin:8px 0 9px}.message-context{font-size:10px;color:var(--green);overflow-wrap:anywhere;border-left:2px solid #bbd4c8;padding-left:8px;line-height:1.7}.message-toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}.message-toolbar button{border:0;background:none;padding:0;min-height:27px;font-size:10px;color:var(--muted);font-weight:600}.message-reply{font-size:10px;color:var(--muted);margin:6px 0}#composer{padding:15px 27px 20px;border-top:1px solid var(--line);background:#fbfcfb}#composer>textarea{border-color:#c2d5cd;background:white;min-height:90px}.composer-actions{display:flex;align-items:center;gap:8px;margin-top:10px}.composer-actions select{width:110px;font-size:11px}.composer-actions button{font-size:11px}.compose-hint{font-size:9px;color:var(--muted);margin-right:auto}.small{font-size:10px;color:var(--muted);line-height:1.7}.file-context{margin-top:9px;font-size:11px;color:var(--muted)}.file-context summary{cursor:pointer;min-height:25px}.context-fields{display:grid;grid-template-columns:1.8fr 1fr 1fr;gap:8px;margin:10px 0}.context-fields input{font-size:11px}.reply-context,.duplicate-box{padding:10px;background:#edf5eb;font-size:11px;margin-bottom:10px;border-radius:7px}.reply-context button,.duplicate-box button{font-size:10px;min-height:30px;margin-left:8px}.action-panel{padding:27px 23px;background:#f9fbf9;border-left:1px solid var(--line)}.action-panel>.section-label{margin-top:3px}.action-panel h2{font-size:21px;letter-spacing:-.7px;margin:21px 0 10px}.muted{font-size:11px;color:var(--muted);line-height:1.8}.summary{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:25px 0}.summary>div{border:1px solid var(--line);border-radius:9px;padding:13px;font-size:10px;color:var(--muted);background:white}.summary strong{display:block;color:var(--ink);font-size:26px;font-weight:600;margin-bottom:6px}.action-tabs{display:flex;border-bottom:1px solid var(--line);gap:15px;margin:25px 0 17px}.action-tabs button{border:0;border-radius:0;background:transparent;font-size:11px;padding:8px 0;color:var(--muted)}.action-tabs button.active{color:var(--ink);border-bottom:2px solid var(--green)}.action-card{border:1px solid var(--line);border-radius:9px;background:white;padding:13px;margin-bottom:12px}.action-card h3{font-size:12px;line-height:1.6;margin:0 0 10px;overflow-wrap:anywhere}.action-card select,.action-card input{font-size:10px;min-height:34px;padding:6px;margin:5px 0}.action-card button{font-size:10px;min-height:32px;margin:5px 5px 0 0;padding:6px 9px}.action-card .source{color:var(--green);display:block;font-size:10px;padding:0;background:none;border:0;margin:0 0 5px}.action-card.done{opacity:.65}.empty-list{font-size:11px;line-height:1.8;color:var(--muted);padding:10px 0}.handoff-note{border-top:1px solid var(--line);margin-top:28px;padding-top:20px;font-size:11px;line-height:1.8}.handoff-note p{color:var(--muted)}dialog{border:1px solid var(--line);border-radius:18px;padding:28px;width:min(470px,calc(100% - 24px));max-height:85dvh;overflow:auto;color:var(--ink);box-shadow:0 20px 80px #193d4038}dialog::backdrop{background:#122e3066;backdrop-filter:blur(3px)}dialog h2{letter-spacing:-.7px}dialog p{font-size:12px;line-height:1.8}dialog label{margin-top:15px}dialog .primary{margin-top:15px}.dialog-close{position:absolute;right:12px;top:12px}.dialog-close button{border:0;font-size:22px}.dialog-actions{display:flex;justify-content:flex-end;align-items:baseline;gap:10px;margin-top:15px}.person{padding:12px 0;border-bottom:1px solid var(--line);font-size:12px}.person small{display:block;font-size:10px;color:var(--muted);margin-top:5px}.person button{font-size:10px;min-height:30px;margin-top:8px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.toast{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;padding:12px 20px;border-radius:12px;max-width:90%;z-index:20;font-size:12px}
@media(min-width:1400px){#app{grid-template-columns:270px minmax(400px,1fr) 330px}.conversation-head,.messages{padding-left:44px;padding-right:44px}}
@media(max-width:1100px){#app{grid-template-columns:210px minmax(340px,1fr)}.action-panel{grid-column:2;border-top:1px solid var(--line);border-left:0}.summary{max-width:270px}.action-panel h2{margin-top:15px}.messages{max-height:50dvh}.top{padding:15px 20px}}
@media(max-width:700px){.top{height:auto;min-height:76px;padding:12px 15px;gap:9px;align-items:flex-start}.brand{gap:10px}.brand img{width:65px;height:40px}.brand>span{font-size:16px;padding-left:10px}.brand small{font-size:9px}.top nav{gap:4px;justify-content:flex-end;flex-wrap:wrap;max-width:132px}.top nav a{display:none}.top nav button{font-size:10px;min-height:34px;padding:6px 8px}#app{display:block;min-height:0}.sidebar{padding:15px;border-right:0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr auto;gap:9px}.sidebar-title{grid-column:1/-1;margin:0}.sidebar>label,.search-label,.sidebar>.section-label,.sidebar-foot{display:none}.sidebar select{grid-column:1}.sidebar .profile{grid-column:1/-1;grid-row:3;margin:0;font-size:10px}.sidebar #new-topic{grid-column:2;grid-row:2;width:auto;font-size:11px}.sidebar #search{grid-column:1;grid-row:4;font-size:12px;min-height:38px}.topics{min-height:0;display:flex;gap:5px;overflow:auto;grid-column:1/-1;max-height:98px}.topic-card{flex:0 0 170px;margin:0;font-size:11px;padding:8px}.sidebar #people-button{grid-column:2;grid-row:4;width:auto;font-size:10px;min-height:38px}.conversation-head{padding:20px 18px 16px}.conversation-head h1{font-size:22px}.conversation-head button{font-size:10px;padding:6px 8px}.notice{margin:12px 15px 0;font-size:10px}.welcome{padding:30px 24px}.welcome h2{font-size:27px}.welcome-steps{gap:8px;font-size:10px}.messages{padding:18px;max-height:50dvh;min-height:160px}.message-body{font-size:13px}#composer{padding:13px 15px 16px}.compose-hint{display:none}.composer-actions{flex-wrap:wrap}.composer-actions #send{margin-left:auto}.context-fields{grid-template-columns:1fr 1fr}.context-fields>label:first-child{grid-column:1/-1}.action-panel{padding:20px 18px}.action-panel h2{font-size:21px}.summary{margin:18px 0;max-width:none}.action-tabs{margin-top:18px}.action-card{margin-bottom:10px}.messages:empty{display:none}}
@media(prefers-reduced-motion:no-preference){button,a{transition:background .14s ease}.message.highlight{animation:flash 1.5s ease}@keyframes flash{50%{background:#e0edb8}}}

/* THREAD3: readable phone inputs, usable touch targets and visible sync state. */
@media(max-width:700px){
 input,select,textarea,.sidebar #search,#composer>textarea,.composer-actions select,.context-fields input,.action-card select,.action-card input{font-size:16px;min-height:44px}
 button,.top nav button,.sidebar #people-button,.message-toolbar button,.action-card button,.reply-context button,.duplicate-box button,.person button,.file-context summary{min-height:44px}
 .sidebar{grid-template-columns:minmax(0,1fr) auto}
 .topics{min-width:0}
 .sidebar-foot{display:flex;grid-column:1/-1;margin-top:0;font-size:11px}
 .message-toolbar{gap:6px 12px}.message-toolbar button{padding:6px 3px}
 .message>div{min-width:0}.message-body{font-size:15px}
 #composer{padding-bottom:max(16px,env(safe-area-inset-bottom))}
 .composer-actions #send{flex:1;min-width:135px}
 .context-fields{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
 dialog{padding:24px 18px;max-height:calc(100dvh - 24px)}
}
@media(max-width:380px){.top{flex-wrap:wrap}.top nav{max-width:none;width:100%}}