/* Chat layout; shared control tokens are owned by ui-system.css. */
.chat-shell{--chat-ink:var(--sina-ink);--chat-muted:var(--sina-muted);position:relative;max-width:1100px;margin:auto;display:flex;flex-direction:column;height:calc(100dvh - 120px);min-height:320px;color:var(--chat-ink);background:transparent}
.chat-tools{display:flex;align-items:center;gap:8px;flex-shrink:0;position:relative;z-index:20;padding:0 0 8px;border-bottom:1px solid var(--line)}
.chat-tools #chatNew{margin-inline-start:auto;background:transparent;border-color:transparent}
.chat-options>summary,.chat-history>summary{display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:10px;cursor:pointer;color:var(--chat-muted);list-style:none;white-space:nowrap}
.chat-options>summary::after,.chat-history>summary::after{content:'⌄';font-size:12px}.chat-tools summary::-webkit-details-marker{display:none}
.chat-options[open]>summary,.chat-history[open]>summary{background:#e7edf5;color:var(--chat-ink)}
#chatScopeCount{background:var(--sina-navy);color:white;border-radius:10px;min-width:18px;text-align:center;font-size:11px}
.chat-heading,.chat-history-panel{position:absolute;inset-inline-start:0;top:calc(100% + 6px);width:min(590px,100%);padding:16px;background:white;border:1px solid var(--line);border-radius:16px;box-shadow:0 15px 45px #17365620;max-height:min(420px,58dvh);overflow:auto}
.chat-heading{display:grid;grid-template-columns:1fr 1fr;gap:14px}.chat-heading label{font-size:13px;min-width:0}.chat-heading small{grid-column:1/-1;color:var(--chat-muted);font-size:12px}
.chat-heading label:has(#chatRemember){display:flex;align-items:center;gap:8px;min-height:44px}.chat-heading input[type=checkbox]{width:18px;height:18px}.chat-heading select{width:100%}
.chat-options .picker-panel{position:relative;inset:auto;min-width:0;width:100%;box-shadow:none;margin-top:6px}.chat-options .picker-options{max-height:150px}
.chat-history-panel{inset-inline-start:auto;inset-inline-end:0;width:min(360px,100%)}.chat-history-panel>input{width:100%;position:sticky;top:0;background:white;border:1px solid var(--line);border-radius:10px;padding:10px;font:inherit;min-height:44px}
#chatHistory button{display:block;width:100%;min-height:44px;text-align:start;border:0;background:transparent;color:var(--chat-ink);padding:10px;overflow-wrap:anywhere}#chatHistory>div{border-bottom:1px solid var(--line)}#chatHistory>div button+button{font-size:13px;color:var(--teal)}#chatHistory button:hover{background:#f3f6fa}
.chat-scope-strip{display:flex;gap:6px;flex-wrap:wrap;padding:8px 0;flex-shrink:0}.chat-scope-chip{border:1px solid #c7d5e5;border-radius:20px;padding:7px 12px;font-size:12px;background:#edf3fa;color:var(--sina-ink);min-height:44px;max-width:100%;overflow-wrap:anywhere}
.chat-messages{flex:1;min-height:60px;overflow-y:auto;padding:24px max(12px,calc((100% - 800px)/2));overscroll-behavior-y:contain;scrollbar-gutter:stable}
.chat-welcome{text-align:start;max-width:690px;margin:clamp(20px,7vh,90px) auto 24px}.welcome-symbol{display:block;color:#956e2a;font-size:36px;margin-bottom:12px}.chat-welcome h3{margin:0 0 12px;font-size:28px;color:var(--sina-navy)}.chat-welcome p{font-size:15px;color:var(--chat-muted);line-height:1.8;margin:0 0 24px}
.chat-prompts{display:flex;flex-wrap:wrap;gap:8px}.chat-prompts button{background:white;border:1px solid var(--line);border-radius:14px;padding:12px 16px;text-align:start;min-height:48px;color:var(--chat-ink)}.chat-prompts button:hover{border-color:#b49a69;background:#fcfaf6}
.chat-message{margin-bottom:24px;line-height:1.9;overflow-wrap:anywhere}.chat-message.user{margin-inline-start:auto;width:fit-content;max-width:85%;background:#e7edf5;color:var(--chat-ink);padding:10px 16px;border-radius:20px 20px 5px 20px;white-space:pre-wrap}.chat-message.assistant{width:100%}.chat-answer-intro{font-weight:600;margin:0 0 10px}
.chat-context-note{font-size:13px;color:var(--chat-muted);border-inline-start:2px solid var(--gold);padding:4px 10px}.chat-evidence{font-size:13px;color:var(--chat-muted);margin-block:8px}.chat-evidence p{margin:6px 0}.chat-evidence summary{cursor:pointer}
.chat-programs{display:grid;gap:10px;margin-top:12px}.chat-programs.chat-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,265px),1fr))}
.chat-program-card{display:flex;align-items:center;gap:12px;text-align:start;width:100%;padding:14px;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--chat-ink)}.chat-program-card:hover{border-color:#9baec4}.chat-program-card>span:nth-child(2){flex:1;min-width:0}.chat-program-card strong,.chat-program-card small{display:block}.chat-program-card small{color:var(--chat-muted);margin-top:4px}.chat-card-icon{font-size:22px;color:#94703b}.chat-price{display:inline-block;font-size:14px;font-weight:600;margin-top:6px}.chat-fee-period{font-size:12px;font-weight:400;margin-inline-start:8px}
.chat-knowledge-item{padding:16px;border:1px solid var(--line);border-radius:14px;margin:12px 0;background:white}.chat-knowledge-item h3{font-size:16px;margin:0 0 8px}.chat-knowledge-item>small{font-size:12px;color:var(--chat-muted)}
.chat-shell .chat-composer{padding:8px 10px;margin:8px max(0px,calc((100% - 800px)/2)) 0;display:grid;grid-template-columns:minmax(0,1fr) 44px;align-items:end;gap:6px;background:#fff;border:1px solid #b7c6d8;border-radius:24px;box-shadow:0 3px 16px #17365609;flex-shrink:0}
.chat-shell .chat-composer:focus-within{outline:2px solid var(--focus-ring);outline-offset:2px}.chat-shell .chat-composer textarea{grid-column:1;grid-row:1;resize:none;border:0;outline:none;background:transparent;border-radius:0;padding:6px 8px;font:inherit;font-size:16px;line-height:24px;height:36px;min-height:36px;max-height:112px;min-width:0;box-shadow:none}.chat-shell .chat-composer textarea:focus-visible{outline:none}
.chat-shell .chat-composer #chatSend,.chat-shell .chat-composer #chatStop{grid-column:2;grid-row:1;display:grid;place-items:center;width:44px;height:44px;min-height:44px;padding:0;border-radius:50%;border:0;background:var(--sina-navy);color:white}
.chat-char-count{grid-column:1/-1;text-align:end;font-size:11px;color:var(--chat-muted);padding-inline:8px}
.chat-footer{position:relative;max-width:800px;width:100%;align-self:center;display:flex;align-items:center;gap:8px;min-height:32px;padding:2px 8px;flex-shrink:0;color:var(--chat-muted);font-size:11px}#chatStatus{flex:1;min-width:0;overflow-wrap:anywhere}.chat-help{margin-inline-start:auto}.chat-help summary{min-height:44px;display:flex;align-items:center;cursor:pointer;white-space:nowrap}.chat-help p{position:absolute;bottom:100%;inset-inline:0;padding:14px;margin:0;background:white;border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 30px #17365618;font-size:13px;line-height:1.8;z-index:10}
.chat-result-tools{margin-block:12px}.chat-result-tools summary{cursor:pointer;color:var(--chat-muted);min-height:44px;display:flex;align-items:center;font-size:13px}.chat-result-tools label{font-size:13px;display:block}.chat-result-tools input{display:block;width:100%;margin-top:4px;min-height:44px;border:1px solid var(--line);border-radius:10px;padding:10px;font:inherit;background:white}
.chat-answer-actions,.chat-followups{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.chat-answer-actions button,.chat-followups button{min-height:44px;padding:8px 12px;border:1px solid var(--line);border-radius:12px;background:white;color:var(--chat-ink);font-size:13px}.chat-followups button{background:#eef3f9}.chat-more{margin-top:12px}
.chat-shell button:focus-visible,.chat-shell summary:focus-visible{outline:3px solid var(--focus-ring);outline-offset:3px}.chat-message:focus{outline:2px solid #b79559;outline-offset:5px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.chat-shell [hidden]{display:none!important}
@media(max-width:640px){.chat-tools{gap:0}.chat-tools #chatNew{padding-inline:8px;font-size:12px}.chat-tools summary{font-size:12px;padding-inline:8px}.chat-heading{padding:12px;gap:10px;max-height:54dvh}.chat-messages{padding:16px 2px}.chat-welcome{margin-top:24px;padding:0 8px}.chat-welcome h3{font-size:24px}.chat-prompts{flex-direction:column}.chat-prompts button{width:100%;padding:10px 14px}.chat-message.user{max-width:93%}.chat-program-card{padding:12px}.chat-footer{padding-inline:4px}.chat-shell .chat-composer{margin-inline:2px}.chat-scope-strip{max-height:104px;overflow:auto}}
/* Advisor response: plain readable prose, compact evidence and existing control tokens. */
.chat-advisor{margin-block:0 20px;padding-block-end:16px;border-bottom:1px solid var(--line);color:var(--sina-ink);overflow-wrap:anywhere}
.chat-advisor-label{font-size:.82rem;font-weight:700;color:var(--sina-navy);margin-bottom:12px}
.chat-advisor-compact{padding:0;border:0;margin:0 0 8px}.chat-advisor-compact p{margin:0}
.chat-advice-text{line-height:1.9;white-space:pre-line;font-size:1rem;margin:12px 0 4px}
.chat-citations{margin-block:2px 12px;font-size:.78rem;color:var(--sina-muted)}
.chat-citations summary{cursor:pointer;min-height:44px;display:flex;align-items:center;width:fit-content}
.chat-advice-text li{padding-inline-start:4px;margin-block:6px}.chat-advice-text:is(ul,ol){padding-inline-start:24px;white-space:normal}
.chat-option-card{min-width:0}.chat-program-identity{flex:1;min-width:0}.chat-program-card .chat-card-icon{flex-shrink:0}.chat-card-icon img{width:40px;height:40px;object-fit:contain}
.chat-program-pricing{flex:0 0 auto;max-width:32%;text-align:end}.chat-program-pricing .chat-price{margin:0;font-size:15px}.chat-program-pricing .chat-fee-period{margin-inline:0;font-size:11px}.chat-detail-arrow{font-size:28px;flex-shrink:0;color:var(--sina-navy)}
.chat-result-summary{margin:12px 0;padding-inline-start:22px;font-size:14px;color:var(--sina-ink);line-height:1.8}.chat-result-summary li{margin:4px 0}
/* Shared by programme AI and chat; uses existing control and focus tokens. */
.specialty-clarification{grid-column:1/-1;width:100%;min-width:0;padding:16px;border:1px solid var(--line);border-radius:16px;background:white;color:var(--sina-ink)}
.specialty-clarification h3{margin:0 0 14px;font-size:16px}.specialty-clarification label{display:block;font-size:13px}.specialty-clarification input{display:block;width:100%;margin-top:6px;padding:10px;min-height:44px;font-size:16px;border:1px solid var(--line);border-radius:10px}
.specialty-choices{display:flex;flex-direction:column;gap:8px;max-height:280px;overflow:auto;margin-top:12px}.specialty-choices button{text-align:start;white-space:normal;min-height:44px;flex-shrink:0;overflow-wrap:anywhere}.specialty-clarification :focus-visible{outline:3px solid var(--focus-ring);outline-offset:2px}
@media(max-width:520px){.chat-program-card{gap:8px}.chat-program-card .chat-card-icon{display:none}.chat-program-identity strong{font-size:14px}.chat-program-identity small{font-size:12px}.chat-program-pricing{max-width:35%}.chat-detail-arrow{font-size:24px}}
.chat-card-date{display:block;color:var(--sina-muted);font-size:12px;margin:4px 12px}
.chat-comparison{grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch;gap:12px}
.chat-comparison-note,.chat-expand-options{grid-column:1/-1}.chat-comparison-note{font-size:13px;color:var(--sina-muted);margin:4px 0}
.chat-comparison-card{border:1px solid var(--line);border-radius:16px;background:white;overflow:hidden;min-width:0}
.chat-comparison-card .chat-program-card{border:0;border-radius:0;background:var(--sina-soft,#f4f6fa);height:auto;min-height:100px;align-items:start}
.chat-comparison-card dl{margin:0;padding:4px 14px 12px}.chat-comparison-card dl>div{padding:9px 0;border-bottom:1px solid var(--line)}.chat-comparison-card dl>div:last-child{border:0}
.chat-comparison-card dt{font-size:12px;color:var(--sina-muted)}.chat-comparison-card dd{font-size:14px;font-weight:600;margin:3px 0 0;overflow-wrap:anywhere}
@media(max-width:520px){.chat-comparison{grid-template-columns:1fr}.chat-comparison-card dl>div{display:grid;grid-template-columns:minmax(90px,.7fr) 1fr;gap:10px}.chat-comparison-card dd{margin:0}.chat-comparison-card .chat-program-card{min-height:0}}
.chat-citations button{font-size:.78rem;max-width:100%;white-space:normal;text-align:start;min-height:44px;padding:6px 10px;background:var(--sina-soft,#f4f6fa);border-radius:10px}
.chat-advisor-question{font-weight:650;line-height:1.8;margin-block:16px 8px}
.chat-advisor-status,.chat-advisor-proof{font-size:.82rem;color:var(--sina-muted);line-height:1.7}
.chat-advisor-proof summary{cursor:pointer;min-height:44px;display:flex;align-items:center;width:fit-content}
.chat-advisor-proof summary:focus-visible{outline:3px solid var(--focus-ring);outline-offset:2px;border-radius:6px}
.chat-advisor-proof p{margin:4px 0 10px}
.advisor-feed [hidden]{display:none!important}
.advisor-feed textarea{font-size:16px;line-height:1.8;resize:vertical}
.advisor-feed p{line-height:1.8;font-size:.85rem;color:var(--sina-muted)}