/* U1 internal assistant: independent list, history and composer. Uses the brand
   tokens already loaded by the formal web app; no review data or styles copied. */
.assistant-page{padding:0;max-width:none;display:flex;flex:1;min-height:0;overflow:hidden}
.assistant-layout{display:grid;grid-template-columns:264px minmax(0,1fr);width:100%;height:100%;min-height:0}
.assistant-list{background:#f7f9f6;border-right:1px solid var(--tb-color-border);display:flex;flex-direction:column;min-height:0;min-width:0}
.assistant-list-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:23px 18px 18px}
.assistant-list-heading h1{font-size:18px;white-space:nowrap}
.assistant-list-heading .btn{height:33px;padding:0 9px;font-size:12px}
.assistant-search{position:relative;margin:0 16px 15px}
.assistant-search input{padding-left:34px;min-height:38px;font-size:12px;background:#fff}
.assistant-search>.icon{position:absolute;left:11px;top:11px;width:16px;height:16px;color:var(--tb-color-text-muted)}
.assistant-thread-list{min-height:0;flex:1;overflow:auto;padding:0 9px 12px}
.assistant-thread{display:flex;gap:10px;width:100%;border-radius:8px;padding:12px 10px;margin:2px 0;text-align:left;align-items:flex-start;color:var(--tb-color-text)}
.assistant-thread:hover{background:#eef3eb}
.assistant-thread.selected{background:#e5efe5;box-shadow:inset 3px 0 var(--tb-color-primary)}
.assistant-thread>.icon,.assistant-thread>span>.icon{width:16px;height:16px;margin-top:3px;color:var(--tb-color-text-muted)}
.assistant-thread>span:last-child{min-width:0;flex:1}
.assistant-thread strong{display:block;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:550}
.assistant-thread small{display:block;font-size:12px;color:var(--tb-color-text-muted);margin-top:3px}
.assistant-list-empty{padding:24px 12px;color:var(--tb-color-text-muted);font-size:12px;line-height:1.8}
.assistant-list-empty .btn{margin-top:12px}
.assistant-list-footer{border-top:1px solid var(--tb-color-border);padding:12px 16px;display:grid;gap:11px;font-size:12px;color:var(--tb-color-text-muted)}
.assistant-list-footer>.row{justify-content:space-between;gap:8px}
.assistant-list-footer .btn{height:31px;font-size:12px;padding:0 10px}
.assistant-detail{display:flex;flex-direction:column;min-width:0;min-height:0;background:#fff}
.assistant-detail-head{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px 28px;border-bottom:1px solid #e8ede6;min-height:84px}
.assistant-detail-head>div:first-child{min-width:0}
.assistant-detail-head h2{font-size:16px;overflow-wrap:anywhere;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.assistant-detail-head .eyebrow{font-size:12px;margin-bottom:3px}
.assistant-detail-head .btn{height:32px;padding:0 10px;font-size:12px}
.assistant-history{flex:1;min-height:0;overflow:auto;padding:30px 38px;scroll-behavior:auto}
.assistant-reader{max-width:820px;margin:0 auto;width:100%;min-width:0}
.assistant-start{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:15px;min-height:260px;max-width:590px;margin:5vh auto;color:var(--tb-color-text-secondary)}
.assistant-start>.icon{color:var(--tb-color-primary);width:29px;height:29px}
.assistant-start h1{font-size:27px;color:var(--tb-color-text)}
.assistant-start p{line-height:1.85;max-width:500px}
.assistant-turn{padding:24px 0;border-bottom:1px solid #edf1eb}
.assistant-turn:first-child{padding-top:0}
.assistant-turn>small{display:block;text-align:right;font-size:12px;color:var(--tb-color-text-muted)}
.assistant-turn>p{margin:10px 0 13px auto;padding:12px 16px;max-width:90%;width:fit-content;border-radius:12px 12px 3px 12px;background:#eef4eb;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.9;color:var(--tb-color-text)}
.assistant-execution{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--tb-color-text-muted)}
.assistant-execution .btn{height:28px;padding:0 9px;font-size:12px}
.assistant-execution-error{color:var(--tb-color-warning)}
.assistant-answer{margin:18px 0 3px;padding-left:16px;border-left:2px solid #b8ceb1;min-width:0;color:var(--tb-color-text);line-height:1.85;overflow-wrap:anywhere}
.assistant-answer>small{font-size:12px;color:var(--tb-color-primary)}
.assistant-answer-text{margin:8px 0 16px;white-space:pre-wrap}
.assistant-answer-next,.assistant-answer-missing{margin-top:14px;font-size:13px}
.assistant-answer-next strong,.assistant-answer-missing strong{font-size:12px;color:var(--tb-color-text-secondary)}
.assistant-answer-next p{margin:4px 0 0;white-space:pre-wrap}
.assistant-answer-missing ul{padding-left:20px;margin:5px 0 0}
.assistant-answer-missing li{padding-left:2px;white-space:pre-wrap}
.assistant-citations,.assistant-old-answer{font-size:12px;color:var(--tb-color-text-secondary);margin-top:14px}
.assistant-citations summary,.assistant-old-answer>summary{cursor:pointer;width:fit-content;line-height:1.8}
.assistant-citation{padding:12px 0 0}
.assistant-citation strong,.assistant-citation small{display:block;font-weight:500}
.assistant-citation small{color:var(--tb-color-text-muted);font-weight:400}
.assistant-citation blockquote{white-space:pre-wrap;margin:6px 0 0;padding:8px 12px;border-radius:6px;background:#f7f9f6;overflow-wrap:anywhere}
.assistant-old-answer>.assistant-answer{margin-top:12px;border-left-color:#d7dcd2}
.assistant-compose{padding:16px 38px 15px;background:#fff;border-top:1px solid #edf1eb;flex:none}
.assistant-compose textarea{display:block;min-height:104px;max-height:230px;width:100%;background:#fafcf9;border:1px solid #ccd9cc;border-radius:12px;padding:14px 16px;line-height:1.8;resize:vertical;font-size:14px}
.assistant-compose textarea:disabled{background:#f4f6f2;color:var(--tb-color-text-muted)}
.assistant-compose-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;flex-wrap:wrap}
.assistant-compose-actions .btn{height:34px;font-size:12px}
.assistant-statusline{display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap;font-size:12px;color:var(--tb-color-text-muted);margin-top:12px}
#assistant-status.error{color:var(--tb-color-warning)}
.assistant-warning{border:1px solid #ead8bb;border-radius:8px;background:#fff9ed;color:#795824;padding:12px 14px;margin-top:12px;font-size:12px}
.assistant-warning p{line-height:1.7;margin-bottom:8px}
.assistant-warning .btn{height:30px;font-size:12px}
.assistant-compare{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:16px}
.assistant-compare pre{white-space:pre-wrap;overflow-wrap:anywhere;font:13px/1.8 var(--tb-font-sans);background:#f5f8f3;border:1px solid var(--tb-color-border);border-radius:8px;padding:12px;max-height:42vh;overflow:auto;margin:10px 0}
.integrated-shell .rail-nav.nav{min-height:0;overflow-y:auto;flex-shrink:1}
@media(max-width:1250px){.assistant-layout{grid-template-columns:232px minmax(0,1fr)}.assistant-history{padding:24px 26px}.assistant-compose{padding:15px 26px}.assistant-detail-head{padding:17px 23px}}
@media(max-width:1050px){.assistant-layout{grid-template-columns:210px minmax(0,1fr)}.assistant-list-heading{padding:20px 12px 15px}.assistant-detail-head{gap:12px}.assistant-detail-head>.row{gap:4px}.assistant-detail-head .btn{padding:0 7px}.assistant-compose-actions>.hint{width:100%}.assistant-compose-actions>.row{margin-left:auto}}