/* v5.8: collapsible conversation list; offers and order actions stay in the thread. */
.chat-page{padding-top:20px;padding-bottom:30px}
.chat-page>.breadcrumbs{margin-bottom:12px}.chat-page>.inner-head{margin-bottom:20px}
.chat-page>.inner-head h1{font-size:30px;margin-bottom:7px}.chat-page>.inner-head p{margin:0;font-size:12px;line-height:1.6}
.chat-page .chat-layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:18px;height:clamp(530px,calc(100dvh - 260px),860px);align-items:stretch}
.chat-page .chat-list{min-height:0;max-height:none;overflow-y:auto;border:1px solid var(--u-line-strong);border-radius:20px;background:var(--u-card)}
.chat-page .conversation-card{padding:16px 13px}.chat-page .conversation-body h3{font-size:13px;line-height:1.5}.chat-page .conversation-body p{font-size:11px;line-height:1.5}
.chat-page .chat-main{min-width:0;min-height:0;height:100%;display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--u-line-strong);border-radius:20px;background:var(--u-card)}
.chat-page .chat-top{padding:15px 21px;flex:none}.chat-page .chat-top>a{font-size:14px;font-weight:800;min-width:0;overflow-wrap:anywhere}
.chat-product-summary{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:13px 20px;border-bottom:1px solid var(--u-line);background:var(--u-card);flex:none;min-width:0}
.chat-product-link{display:flex;align-items:center;gap:12px;min-width:0}.chat-product-link>img{width:49px;height:49px;object-fit:contain;border-radius:10px;background:var(--u-surface);flex:none}
.chat-product-link>span{display:grid;gap:4px;min-width:0}.chat-product-link strong{font-size:12px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.chat-product-link small{font-size:12px;color:var(--u-accent-text);font-weight:750}
.chat-product-summary .trade-actions{margin:0;flex:none;gap:8px}.chat-product-summary .btn{font-size:11px;padding:10px 13px;min-height:38px}
.chat-page #chat-messages{display:flex;flex-direction:column;gap:15px;flex:1;min-height:0;max-height:none;padding:24px;overflow-y:auto;overscroll-behavior:contain;scroll-behavior:auto}
.chat-page .bubble{max-width:min(78%,74ch);line-height:1.7;padding:14px 17px;flex:none}.chat-page .bubble small{line-height:1.6;margin-top:7px}
.chat-page .chat-commerce-panel{align-self:center;flex:none;width:min(100%,740px);margin:4px 0;padding:21px 23px;border:1px solid var(--u-line-strong);border-radius:19px;background:var(--u-card);color:var(--u-text);box-shadow:var(--u-soft-shadow)}
.chat-commerce-panel>.trade-card-top{align-items:center;gap:12px}.chat-commerce-panel>.trade-card-top>span:last-child{font-size:11px;color:var(--u-subtle)}
.chat-commerce-panel>h3{font-size:27px;line-height:1.4;margin:14px 0 8px}.chat-commerce-panel p{font-size:12px;line-height:1.8;margin:8px 0}.chat-commerce-panel .trade-actions{margin-top:14px;gap:9px}.chat-commerce-panel .btn{min-height:40px;font-size:12px;padding:10px 15px}
.chat-commerce-panel details{margin-top:16px;border-top:1px solid var(--u-line);padding-top:14px}.chat-commerce-panel summary{font-size:12px;font-weight:750;cursor:pointer;line-height:1.6}.chat-commerce-panel .trade-costs{margin-top:15px;font-size:12px}
.chat-commerce-panel .trade-timeline{margin-bottom:0}.chat-commerce-panel .trade-timeline strong{display:block;font-size:12px;line-height:1.6}.chat-commerce-panel .trade-evidence img{width:72px;height:80px;object-fit:contain}
.chat-offer-clock{font-size:12px;line-height:1.8;color:var(--u-accent-text);font-variant-numeric:tabular-nums}.chat-offer-clock strong{font-size:17px;white-space:nowrap}
.chat-expired-note{color:var(--u-subtle);line-height:1.8}.chat-thread-empty{margin:auto;text-align:center;font-size:13px;color:var(--u-subtle)}
.chat-offer-composer{flex:none;display:grid;gap:13px;margin:0;padding:18px 21px;border-top:1px solid var(--u-line-strong);background:var(--u-accent-bg)}
.chat-offer-composer[hidden]{display:none!important}.chat-offer-heading,.chat-offer-send{display:flex;justify-content:space-between;align-items:center;gap:15px}.chat-offer-heading h3{font-size:15px;margin:0;line-height:1.5}.chat-offer-composer>label{display:grid;gap:7px;font-size:12px;font-weight:750}.chat-offer-composer input{width:min(100%,300px)}.chat-offer-heading .btn{min-height:32px;padding:7px 12px;font-size:11px}.chat-offer-send small{font-size:11px;line-height:1.7;color:var(--u-subtle);max-width:45ch}.chat-offer-send .btn{font-size:12px;min-height:40px;flex:none}
.chat-page .chat-compose{padding:16px 20px;gap:11px;flex:none;border-top:1px solid var(--u-line)}.chat-page .chat-compose input{min-height:47px;min-width:0;font-size:14px}.chat-page .chat-compose .btn{min-height:47px;padding-inline:24px}
@media(max-width:1100px){.chat-page .chat-layout{grid-template-columns:220px minmax(0,1fr);gap:13px}.chat-product-summary{padding:12px 15px;gap:12px}.chat-product-summary .trade-actions{flex-wrap:wrap;justify-content:flex-end;max-width:240px}.chat-page #chat-messages{padding:18px}.chat-page .chat-commerce-panel{padding:18px}.chat-page .chat-compose{padding:13px 15px}}
@media(max-width:760px){.chat-page .chat-layout{grid-template-columns:1fr;height:auto;gap:12px}.chat-page .chat-list{display:flex;max-height:125px;min-height:95px;overflow-x:auto;overflow-y:hidden}.chat-page .conversation-card{min-width:210px;border-bottom:0;border-right:1px solid var(--u-line)}.chat-page .chat-main{height:clamp(560px,calc(100dvh - 180px),780px)}.chat-product-summary{align-items:flex-start}.chat-product-link>img{width:40px;height:40px}.chat-product-summary .trade-actions{max-width:170px}.chat-page .bubble{max-width:90%}.chat-offer-send{align-items:flex-start;flex-wrap:wrap}.chat-page .chat-compose .btn{padding-inline:16px}.chat-page .chat-top{padding-inline:15px}.chat-page .chat-top small{font-size:10px;white-space:nowrap}}
@media(max-width:420px){.chat-product-summary{flex-wrap:wrap}.chat-product-summary .trade-actions{max-width:none;justify-content:flex-start}.chat-page #chat-messages{padding:13px;gap:12px}.chat-page .chat-commerce-panel{padding:16px}.chat-page .chat-commerce-panel .trade-actions>.btn{flex:1 1 105px}.chat-offer-composer{padding:15px}.chat-page .chat-compose{padding:12px;gap:8px}}
@media(prefers-reduced-motion:reduce){.chat-page *{scroll-behavior:auto!important}}

.chat-commerce-panel .trade-badge[data-state=accepted],.chat-commerce-panel .trade-badge[data-state=completed]{border-color:var(--u-accent)}
.chat-page .chat-layout.is-list-collapsed{grid-template-columns:minmax(0,1fr);gap:0}
.chat-page .chat-list[hidden]{display:none!important}
.chat-page .chat-top>a{flex:1}
.chat-list-toggle{display:inline-flex;align-items:center;justify-content:center;gap:8px;flex:none;min-height:38px;padding:8px 11px;border:1px solid var(--u-line-strong);border-radius:10px;background:var(--u-surface);color:var(--u-text);font-size:11px;font-weight:750;line-height:1.4}
.chat-list-toggle svg{width:19px;height:19px}
.chat-list-toggle:hover{border-color:var(--u-accent);background:var(--u-accent-bg)}
.chat-list-toggle:focus-visible{outline:2px solid var(--u-accent);outline-offset:3px}
.chat-list-toggle[aria-expanded=false]{background:var(--u-accent-bg);border-color:var(--u-accent)}
@media(max-width:950px){.chat-list-toggle>span{display:none}.chat-page .chat-top{gap:10px}.chat-list-toggle{width:38px;padding:8px}}
@media(max-width:420px){.chat-page .chat-top{flex-wrap:wrap}.chat-page .chat-top small{width:100%;padding-left:48px}}