*{margin:0;padding:0;box-sizing:border-box}html,body,#app{width:100%;height:100%}body{min-height:100vh;padding:24px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;color:#172033;background:linear-gradient(180deg,#eef5fb,#e6eef6)}#app{display:grid;place-items:center}.chat-container{--primary-color: #0f6fdc;--accent-color: #00a884;position:relative;display:flex;flex-direction:column;width:min(100%,430px);min-height:min(640px,calc(100vh - 48px));height:min(760px,calc(100vh - 48px));overflow:hidden;background:#f7f9fc;border:1px solid #dbe5f0;border-radius:12px;box-shadow:0 22px 60px #2232542e}.chat-header{min-height:76px;padding:18px 18px 16px;background:var(--primary-color);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:14px}.brand{display:flex;align-items:center;min-width:0;gap:12px}.brand-mark,.message-avatar{display:grid;place-items:center;flex:0 0 auto;width:40px;height:40px;border-radius:10px;font-weight:700}.brand-mark{color:var(--primary-color);background:#fff}.brand-mark.has-avatar,.message-avatar.has-avatar{overflow:hidden;background:#fff}.brand-mark img,.message-avatar img{display:block;width:100%;height:100%;object-fit:cover}.brand-copy{min-width:0}.brand-copy h1{font-size:18px;line-height:1.25;font-weight:700;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.brand-copy p{margin-top:3px;font-size:12px;line-height:1.3;color:#ffffffdb}.chat-header .status{display:inline-flex;align-items:center;flex:0 0 auto;max-width:96px;padding:6px 10px;border-radius:999px;font-size:12px;line-height:1;color:#ffffffeb;background:#ffffff24}.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px;background:#aeb9c9}.status-dot.online{background:#3fe07f}.status-dot.offline{background:#aeb9c9}.status-dot.connecting{background:#ffcc4d}.survey-panel{position:absolute;top:0;right:0;bottom:0;left:0;z-index:20;display:flex;align-items:flex-end;justify-content:center;padding:18px;background:#0f172a47}.survey-card{width:min(100%,420px);padding:18px;border-radius:8px;background:#fff;box-shadow:0 18px 48px #0f172a38}.survey-header{display:flex;justify-content:space-between;gap:12px}.survey-header h2{margin:0;font-size:18px;line-height:1.3;color:#111827}.survey-header p{margin:4px 0 0;font-size:13px;color:#64748b}.survey-close{width:32px;height:32px;border:0;border-radius:50%;background:#f1f5f9;color:#475569;font-size:20px;line-height:1;cursor:pointer}.survey-stars{display:flex;gap:6px;margin-top:14px}.survey-stars button{width:38px;height:38px;border:1px solid #e2e8f0;border-radius:8px;background:#fff;color:#cbd5e1;font-size:24px;cursor:pointer}.survey-stars button.active{border-color:#f59e0b;color:#f59e0b;background:#fffbeb}.survey-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.survey-tags button{border:1px solid #e2e8f0;border-radius:999px;padding:6px 10px;background:#fff;color:#475569;font-size:13px;cursor:pointer}.survey-tags button.active{border-color:var(--primary-color);background:#0f6fdc14;color:var(--primary-color)}.survey-comment{width:100%;min-height:78px;margin-top:14px;padding:10px 12px;border:1px solid #e2e8f0;border-radius:8px;resize:vertical;font:inherit;outline:none}.survey-error{margin:8px 0 0;color:#dc2626;font-size:13px}.survey-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:14px}.survey-secondary,.survey-primary{min-width:86px;height:36px;border-radius:8px;border:1px solid #e2e8f0;padding:0 14px;font-weight:600;cursor:pointer}.survey-secondary{background:#fff;color:#475569}.survey-primary{border-color:var(--primary-color);background:var(--primary-color);color:#fff}.survey-primary:disabled{opacity:.65;cursor:not-allowed}.chat-messages{flex:1;min-height:0;overflow-y:auto;padding:22px 18px;background:#f3f6fa}.message{display:flex;align-items:flex-start;gap:9px;margin-bottom:16px}.message.inbound{justify-content:flex-start}.message.outbound{justify-content:flex-end}.message-avatar{width:32px;height:32px;border-radius:9px;color:#fff;background:var(--accent-color);font-size:14px}.message-bubble{max-width:min(74%,300px);padding:11px 13px 9px;border-radius:12px;word-break:break-word;overflow-wrap:anywhere;line-height:1.5;box-shadow:0 8px 22px #21304a14}.message.inbound .message-bubble{background:#fff;color:#172033;border:1px solid #e2e9f2;border-top-left-radius:4px}.message.outbound .message-bubble{background:var(--primary-color);color:#fff;border-top-right-radius:4px}.message-content{white-space:pre-wrap}.message-time{margin-top:4px;font-size:11px;line-height:1.2;color:#60708a}.message.outbound .message-time{text-align:right;color:#ffffffb8}.message-content .message-image{display:block;max-width:100%;border-radius:8px}.message-content .message-file{color:inherit;text-decoration:underline;word-break:break-all}.message.inbound .message-content .message-file{color:var(--primary-color)}.message-content .message-file-size{margin-left:6px;font-size:12px;opacity:.85}.chat-input{display:flex;gap:10px;padding:14px 16px;border-top:1px solid #dce5ef;background:#fff}.image-draft{display:flex;align-items:center;gap:10px;padding:10px 16px;border-top:1px solid #dce5ef;background:#fff}.image-draft-preview{display:flex;align-items:center;min-width:0;gap:10px;flex:1}.image-draft-preview img{width:52px;height:52px;object-fit:cover;border-radius:8px;border:1px solid #dce5ef}.image-draft-meta{display:flex;flex-direction:column;min-width:0;gap:4px}.image-draft-meta strong{overflow:hidden;color:#172033;white-space:nowrap;text-overflow:ellipsis}.image-draft-meta span,.image-draft-error{color:#60708a;font-size:12px}.image-draft-error{flex:1;color:#dc2626}.image-draft-remove{flex:0 0 auto;height:32px;padding:0 10px;border:1px solid #d4deeb;border-radius:8px;background:#fff;color:#52647c;cursor:pointer}.file-input{display:none}.chat-input textarea{flex:1;min-width:0;min-height:42px;max-height:112px;padding:10px 12px;border:1px solid #d4deeb;border-radius:8px;outline:none;resize:none;color:#172033;background:#f9fbfe;font-size:14px;line-height:1.5}.chat-input textarea:focus{border-color:var(--primary-color);background:#fff;box-shadow:0 0 0 3px #0f6fdc1f}.chat-input button{flex:0 0 auto;min-width:64px;height:42px;padding:0 18px;border:none;border-radius:8px;background:var(--primary-color);color:#fff;font-size:14px;font-weight:700;cursor:pointer;transition:background .18s,opacity .18s}.chat-input .attach-button{min-width:58px;padding:0 12px;border:1px solid #d4deeb;background:#f9fbfe;color:#52647c}.chat-input button:hover{background:#0b5fc0}.chat-input .attach-button:hover{border-color:var(--primary-color);background:#fff;color:var(--primary-color)}.chat-input button:disabled{background:#9fc5f0;cursor:not-allowed}.load-more{padding:4px 0 14px;text-align:center}.load-more button{padding:6px 14px;border:1px solid #d4deeb;border-radius:999px;background:#fff;cursor:pointer;font-size:12px;color:#52647c}.load-more button:hover{border-color:var(--primary-color);color:var(--primary-color)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;min-height:260px;color:#7a889c}.empty-state .icon{width:58px;height:58px;margin-bottom:14px;border-radius:16px;background:radial-gradient(circle at 64% 36%,#fff 0 8px,transparent 9px),linear-gradient(135deg,var(--primary-color),#5aa7ff);box-shadow:0 12px 28px #0f6fdc38}.empty-state p{font-size:14px}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:transparent}.chat-messages::-webkit-scrollbar-thumb{background:#cad5e2;border-radius:3px}.chat-messages::-webkit-scrollbar-thumb:hover{background:#b8c5d5}@media (max-width: 640px){body{padding:0;background:#f3f6fa}.chat-container{width:100%;height:100%;min-height:100%;border:none;border-radius:0;box-shadow:none}.chat-header{min-height:72px;padding:16px}.message-bubble{max-width:78%}.chat-input{gap:8px;padding:12px}.chat-input button{padding:0 12px}}