:root{--chat-brand:#ff3400;--chat-bg:#f8fafc;--chat-panel-bg:#ffffff;--chat-text:#0f172a;--chat-muted:#64748b;--chat-line:#e2e8f0;--chat-radius:14px;--chat-bubble:#f1f5f9;--chat-bubble-own:#e7eef7}.chat-shell{display:grid;grid-template-columns:320px minmax(0,1fr);grid-gap:16px;gap:16px;padding:16px;min-height:78vh;background:var(--chat-bg)}@media(max-width:759px){.chat-shell{grid-template-columns:1fr}}.chat-shell__sidebar{background:var(--chat-panel-bg);border:1px solid var(--chat-line);border-radius:var(--chat-radius);display:flex;flex-direction:column;min-height:0;overflow:hidden}.chat-sidebar__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px;border-bottom:1px solid var(--chat-line)}.chat-sidebar__title{margin:0;font:700 15px/1.2 system-ui;color:var(--chat-text)}.chat-sidebar__close{width:32px;height:32px;border-radius:8px;border:1px solid var(--chat-line);background:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:18px;cursor:pointer}.chat-sidebar__list{flex:1 1 auto;overflow-y:auto;padding:8px 0}.chat-sidebar__item{display:flex;align-items:center;gap:8px;padding:6px 12px;border-bottom:1px solid var(--chat-line)}.chat-sidebar__item.is-active{background:rgba(14,116,144,.08)}.chat-sidebar__item-main{flex:1 1 auto;padding:6px;background:none;border:0;text-align:left;display:grid;grid-gap:6px;gap:6px;border-radius:10px;cursor:pointer;transition:background .2s ease}.chat-sidebar__item-main:hover,.chat-sidebar__item.is-active .chat-sidebar__item-main{background:rgba(241,245,249,.75)}.chat-sidebar__item-title{font:600 14px/1.2 system-ui;color:var(--chat-text)}.chat-sidebar__item-meta{display:flex;align-items:center;gap:8px;font:12px/1.2 system-ui;color:var(--chat-muted);flex-wrap:wrap}.chat-sidebar__badge{padding:2px 8px;border-radius:999px;background:#fee2e2;color:#b91c1c;font:700 11px/1 system-ui}.chat-sidebar__delete{width:34px;height:34px;border-radius:10px;border:1px solid var(--chat-line);background:#fff;color:#b91c1c;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:background .2s ease,color .2s ease}.chat-sidebar__delete:hover{background:#fee2e2;color:#7f1d1d}.chat-shell__panel{background:var(--chat-panel-bg);border:1px solid var(--chat-line);border-radius:var(--chat-radius);display:flex;flex-direction:column;min-height:0;overflow:hidden}.chat-panel__placeholder{display:grid;place-items:center;padding:48px;color:var(--chat-muted)}.chat-panel__top{display:flex;align-items:center;gap:12px;padding:16px;border-bottom:1px solid var(--chat-line);background:#fff;position:-webkit-sticky;position:sticky;top:0;z-index:5}.chat-panel__back{width:36px;height:36px;border-radius:10px;border:1px solid var(--chat-line);background:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:18px;cursor:pointer}.chat-panel__summary{flex:1 1 auto;display:flex;align-items:center;gap:10px;min-width:0}.chat-panel__lot-name{font:700 16px/1.2 system-ui;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-badge{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:999px;font:600 11px/1 system-ui;letter-spacing:.04em;text-transform:uppercase;background:#e2e8f0;color:#0f172a}.chat-badge--pending{background:#fef3c7;color:#b45309}.chat-badge--confirmed{background:#dcfce7;color:#166534}.chat-badge--declined{background:#fee2e2;color:#991b1b}.chat-lot-card{display:flex;gap:14px;align-items:center;border-bottom:1px solid var(--chat-line);padding:16px;flex-wrap:wrap;background:#f8fafc}.chat-lot-card__thumb{width:64px;height:64px;border-radius:12px;overflow:hidden;border:1px solid var(--chat-line);background:#fff;flex-shrink:0}.chat-lot-card__img{width:100%;height:100%;object-fit:cover}.chat-lot-card__body{flex:1 1 auto;min-width:0;display:grid;grid-gap:4px;gap:4px}.chat-lot-card__title{font:600 15px/1.2 system-ui;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-lot-card__price{display:flex;align-items:center;gap:6px;font:13px/1.2 system-ui;color:var(--chat-muted)}.chat-lot-card__price strong{font-size:14px;color:var(--chat-text)}.chat-lot-card__timer{font-size:12px;color:#b45309;font-weight:600}.chat-lot-card__actions{display:grid;width:100%;grid-template-columns:1fr 1fr}.chat-lot-card__action{border:1px solid var(--chat-line);border-radius:10px;font:600 12px/1 system-ui;background:#fff;cursor:pointer;transition:background .2s ease;text-align:center;padding:10px 0;display:flex;justify-content:center}.chat-lot-card__action:hover{background:#e2e8f0}.chat-lot-card__action--danger{border-color:#fca5a5;color:#b91c1c}.chat-lot-card__action--danger:hover{background:#fee2e2;color:#7f1d1d}.chat-panel__messages{flex:1 1 auto;padding:16px;overflow-y:auto;background:var(--chat-panel-bg)}.msg{display:grid;grid-gap:6px;gap:6px;margin-bottom:12px;max-width:82%;word-break:break-word}.msg .msg-header{display:flex;align-items:center;gap:8px;font:600 12px/1.2 system-ui;color:var(--chat-muted)}.msg .msg-avatar{width:28px;height:28px;border-radius:50%;object-fit:cover}.msg .msg-avatar,.msg p{border:1px solid var(--chat-line)}.msg p{margin:0;padding:10px 14px;background:var(--chat-bubble);border-radius:14px;line-height:1.45;font-size:14px;color:var(--chat-text)}.msg.own{margin-left:auto;justify-items:end}.msg.own p{background:var(--chat-bubble-own);border-color:#d6e3f1}.chat-panel__footer{padding:16px;border-top:1px solid var(--chat-line);background:#fff;display:grid;grid-gap:12px;gap:12px}.chat-panel__footer--locked{background:#f8fafc}.chat-panel__notice{margin:0;font:13px/1.4 system-ui;color:var(--chat-muted)}.chat-footer__actions{display:flex;flex-wrap:wrap;gap:8px}.chat-composer{display:flex;gap:10px;align-items:flex-end}.chat-composer__input{flex:1 1 auto;resize:none;min-height:46px;max-height:200px;padding:12px;border:1px solid var(--chat-line);border-radius:12px;outline:none;line-height:1.4;font-size:14px}.chat-composer__input:focus{border-color:#f59e0b;outline:2px solid rgba(255,52,0,.18)}.chat-composer__send{height:46px;padding:0 20px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 14px;border-radius:12px;border:1px solid var(--chat-line);font:700 14px/1 system-ui;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}.btn:hover{transform:translateY(-1px);box-shadow:0 6px 14px rgba(15,23,42,.12)}.btn-primary{background:var(--chat-brand);color:#fff;border-color:var(--chat-brand)}.btn-outline{background:#fff;color:var(--chat-text)}.btn-success{background:#10b981;border-color:#10b981;color:#fff}.chat-panel__typing{font-size:12px;color:var(--chat-muted)}.chat-lot-modal{display:flex;gap:16px;flex-wrap:wrap}.chat-lot-modal__image{width:96px;height:96px;object-fit:cover;border-radius:12px;border:1px solid var(--chat-line)}.chat-lot-modal__info{flex:1 1 220px;display:grid;grid-gap:10px;gap:10px}.chat-lot-modal__title{font-weight:700;font-size:16px}.chat-lot-modal__chips{display:flex;gap:8px;flex-wrap:wrap}.chat-chip{padding:4px 10px;border-radius:999px;background:#e2e8f0;font:600 11px/1 system-ui}.chat-chip--success{background:#dcfce7;color:#166534}.chat-lot-modal__grid{display:grid;grid-gap:6px;gap:6px;font-size:14px}.chat-lot-modal__actions{display:flex;gap:8px;flex-wrap:wrap}.chat-shell--mobile{grid-template-columns:1fr;padding:0;min-height:100dvh}.chat-shell--mobile .chat-shell__panel{border-radius:0;border-left:0;border-right:0;min-height:100dvh}.chat-shell--mobile .chat-shell__sidebar{position:fixed;inset:0;max-width:360px;width:100%;transform:translateX(-100%);transition:transform .3s ease;z-index:30;border-radius:0}.chat-shell--mobile.chat-shell--show-list .chat-shell__sidebar{transform:translateX(0);box-shadow:0 24px 60px rgba(15,23,42,.25)}.chat-shell--mobile .chat-shell__panel{background:var(--chat-panel-bg)}.chat-shell--mobile.chat-shell--show-list .chat-shell__panel{filter:blur(2px);pointer-events:none}.chat-shell--mobile .chat-panel__top{position:-webkit-sticky;position:sticky;top:0}.chat-shell--mobile .chat-panel__messages{padding-bottom:140px}.chat-shell--mobile .chat-panel__footer{position:-webkit-sticky;position:sticky;bottom:0;z-index:10;box-shadow:0 -18px 30px rgba(15,23,42,.12)}@media(max-width:960px){.chat-shell{grid-template-columns:280px minmax(0,1fr)}}@media(max-width:720px){.chat-lot-card{margin:12px}.chat-shell{grid-template-columns:1fr}.chat-lot-card__actions .chat-lot-card__action{flex:1 1 100%;text-align:center}.chat-footer__actions .btn{flex:1 1 100%}.chat-composer__send{flex:0 0 auto}}.chat-shell--mobile .chat-panel__top{display:flex;flex-direction:column;align-items:stretch;gap:10px}.chat-shell--mobile .chat-panel__back{align-self:flex-start}.chat-shell--mobile .chat-panel__summary{flex-wrap:wrap;gap:6px}.chat-shell--mobile .chat-panel__lot-name{width:100%}