#productChatScreen{padding:14px}.pc-chat-shell{display:grid;grid-template-columns:minmax(260px,360px) 1fr;gap:12px;min-height:620px}.pc-chat-list,.pc-chat-window{background:#fff;border:1px solid #e5e7eb;border-radius:16px;overflow:hidden;box-shadow:0 8px 24px rgba(15,23,42,.06)}.pc-chat-head,.pc-window-head{padding:14px 16px;border-bottom:1px solid #edf0f4;display:flex;justify-content:space-between;align-items:center}.pc-chat-head h2{margin:0;font-size:18px}.pc-chat-head small,.pc-window-head small{display:block;color:#64748b;font-size:11px}.pc-chat-head button{border:0;background:#f3f4f6;border-radius:10px;width:36px;height:36px}.pc-chat-card{width:100%;display:flex;gap:10px;text-align:left;padding:11px;border:0;border-bottom:1px solid #f1f5f9;background:#fff;position:relative}.pc-chat-card.active{background:#fff7ed}.pc-chat-avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#f97316;color:#fff;font-weight:800}.pc-chat-card strong,.pc-chat-card small,.pc-chat-card p{display:block}.pc-chat-card small{font-size:10px;color:#64748b}.pc-chat-card p{font-size:11px;color:#475569;margin:4px 0 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:210px}.pc-unread{position:absolute;right:10px;top:10px;background:#16a34a;color:#fff;border-radius:99px;padding:2px 7px;font-size:10px}.pc-messages{height:500px;overflow:auto;padding:16px;background:#f8fafc}.pc-bubble{max-width:78%;padding:9px 11px;border-radius:13px;margin:7px 0;font-size:12px}.pc-bubble.customer{background:#fff;border:1px solid #e2e8f0;margin-right:auto}.pc-bubble.admin{background:#f97316;color:#fff;margin-left:auto}.pc-bubble small{display:block;font-size:8px;opacity:.7;margin-top:4px}.pc-reply{display:flex;gap:8px;padding:10px;border-top:1px solid #edf0f4}.pc-reply textarea{flex:1;min-height:42px;border:1px solid #dbe2ea;border-radius:10px;padding:9px;resize:none}.pc-reply button{width:44px;border:0;border-radius:11px;background:#f97316;color:#fff}.pc-empty{padding:25px;text-align:center;color:#94a3b8;font-size:12px}@media(max-width:760px){.pc-chat-shell{grid-template-columns:1fr}.pc-chat-window{min-height:520px}.pc-messages{height:420px}}

/* Step 42.10 — WhatsApp-style single-chat mode */
.pc-chat-shell{position:relative;min-height:620px;}
.pc-chat-search{display:flex;align-items:center;gap:7px;margin:9px 10px;padding:8px 10px;background:#f8fafc;border:1px solid #e2e8f0;border-radius:11px;}
.pc-chat-search .material-icons{font-size:18px;color:#94a3b8}.pc-chat-search input{border:0;outline:0;background:transparent;width:100%;font-size:12px;}
.pc-chat-window{min-width:0;display:flex;flex-direction:column;}
.pc-window-head{min-height:62px!important;justify-content:flex-start!important;gap:10px;}
.pc-chat-back{display:none;border:0;background:#f1f5f9;color:#334155;width:38px;height:38px;border-radius:10px;align-items:center;justify-content:center;}
.pc-chat-shell.chat-open .pc-chat-list{display:none;}
.pc-chat-shell.chat-open{display:block!important;}
.pc-chat-shell.chat-open .pc-chat-window{width:100%;min-height:620px;}
.pc-chat-shell.chat-open .pc-chat-back{display:flex;}
.pc-window-title{min-width:0;display:flex;flex-direction:column;gap:2px;}.pc-window-title strong{font-size:15px}.pc-window-title small{font-size:10px;color:#64748b;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.pc-window-status{margin-left:auto;color:#16a34a;font-size:10px;display:flex;gap:5px;align-items:center;}.pc-window-status i{width:7px;height:7px;background:#22c55e;border-radius:50%;display:inline-block;}
.pc-chat-card-copy{min-width:0;flex:1}.pc-chat-card-copy p{max-width:calc(100% - 4px)!important;}
@media(max-width:760px){.pc-chat-shell.chat-open .pc-chat-window{min-height:calc(100vh - 100px);}.pc-chat-shell.chat-open .pc-messages{height:calc(100vh - 245px);min-height:280px;}.pc-chat-shell:not(.chat-open) .pc-chat-window{display:none;}.pc-chat-shell{min-height:0;}.pc-chat-list{min-height:520px;}}


/* Step 42.11 — Customer Chat visual refresh */
#productChatScreen{padding:12px!important;background:linear-gradient(180deg,#f8fbff,#eef5f9)!important;border-radius:18px!important}
.pc-chat-shell{gap:14px!important;min-height:calc(100vh - 150px)!important}
.pc-chat-list,.pc-chat-window{border:1px solid #dbe5ee!important;border-radius:18px!important;box-shadow:0 12px 35px rgba(15,23,42,.08)!important;background:#fff!important}
.pc-chat-head{padding:16px 17px!important;background:linear-gradient(135deg,#1d4ed8,#2563eb 58%,#0ea5e9)!important;color:#fff!important;border-bottom:0!important}
.pc-chat-head h2{font-size:20px!important;font-weight:900!important;color:#fff!important;letter-spacing:.1px!important}
.pc-chat-head small{font-size:10px!important;color:rgba(255,255,255,.82)!important;margin-top:3px!important}
.pc-chat-head button{background:rgba(255,255,255,.14)!important;color:#fff!important;border:1px solid rgba(255,255,255,.25)!important}
.pc-chat-search{display:flex!important;align-items:center!important;gap:7px!important;margin:10px!important;padding:0 10px!important;height:38px!important;border:1px solid #dce5ec!important;border-radius:12px!important;background:#f8fafc!important}
.pc-chat-search .material-icons{font-size:18px!important;color:#64748b!important}.pc-chat-search input{flex:1!important;border:0!important;outline:0!important;background:transparent!important;font-size:11px!important;color:#1e293b!important}
.pc-chat-list #pcChatListBody{padding:0 7px 9px!important}
.pc-chat-card{width:100%!important;box-sizing:border-box!important;display:flex!important;gap:11px!important;text-align:left!important;padding:12px 10px!important;border:0!important;border-bottom:1px solid #edf2f6!important;background:#fff!important;position:relative!important;border-radius:12px!important;margin:2px 0!important;transition:background .16s ease,transform .16s ease!important}
.pc-chat-card:hover{background:#f8fbff!important}.pc-chat-card.active{background:#eff6ff!important}
.pc-chat-avatar{width:44px!important;height:44px!important;flex:0 0 44px!important;border-radius:14px!important;background:linear-gradient(135deg,#2563eb,#0ea5e9)!important;color:#fff!important;box-shadow:0 5px 12px rgba(37,99,235,.18)!important;font-size:15px!important}
.pc-chat-card-copy{min-width:0!important;flex:1!important;padding-right:28px!important}.pc-chat-card strong{font-size:13px!important;font-weight:900!important;color:#172033!important}.pc-chat-card small{font-size:9px!important;color:#2563eb!important;margin-top:3px!important;font-weight:700!important}.pc-chat-card p{font-size:10px!important;color:#64748b!important;margin:5px 0 0!important;max-width:none!important}
.pc-unread{right:9px!important;top:11px!important;background:#16a34a!important;padding:3px 7px!important;font-size:9px!important;box-shadow:0 2px 7px rgba(22,163,74,.18)!important}
.pc-window-head{padding:13px 15px!important;background:linear-gradient(135deg,#ffffff,#f8fbff)!important;border-bottom:1px solid #e5edf4!important}
.pc-chat-back{width:34px!important;height:34px!important;border:0!important;border-radius:10px!important;background:#e8f1ff!important;color:#2563eb!important;display:grid!important;place-items:center!important}
.pc-window-title strong{font-size:14px!important;color:#172033!important;font-weight:900!important}.pc-window-title small{font-size:9px!important;color:#64748b!important;margin-top:2px!important}
.pc-window-status{font-size:9px!important;color:#16a34a!important;font-weight:800!important}.pc-window-status i{display:inline-block!important;width:7px!important;height:7px!important;border-radius:50%!important;background:#22c55e!important;margin-right:4px!important}
.pc-messages{background:radial-gradient(circle at 10% 10%,#f0f7ff,#f8fafc 55%,#eef7f3)!important;padding:15px!important}
.pc-bubble{max-width:80%!important;padding:9px 11px!important;border-radius:14px!important;font-size:11px!important;box-shadow:0 2px 7px rgba(15,23,42,.05)!important}.pc-bubble.customer{background:#fff!important;border:1px solid #e2e8f0!important}.pc-bubble.admin{background:linear-gradient(135deg,#2563eb,#1d4ed8)!important;color:#fff!important}
.pc-reply{background:#fff!important;padding:10px!important;border-top:1px solid #e5edf4!important}.pc-reply textarea{border:1px solid #dbe4ec!important;border-radius:12px!important;font-size:11px!important}.pc-reply button{width:42px!important;border-radius:12px!important;background:linear-gradient(135deg,#2563eb,#1d4ed8)!important}
@media(max-width:760px){#productChatScreen{padding:8px!important}.pc-chat-shell{min-height:calc(100vh - 110px)!important}.pc-chat-list{min-height:calc(100vh - 125px)!important}.pc-chat-head h2{font-size:21px!important}.pc-chat-card{padding:13px 9px!important}.pc-chat-avatar{width:46px!important;height:46px!important;flex-basis:46px!important}.pc-chat-shell.chat-open .pc-chat-window{min-height:calc(100vh - 95px)!important}.pc-chat-shell.chat-open .pc-messages{height:calc(100vh - 230px)!important;min-height:300px!important}}