*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:#f3f4f6;height:100vh;width:100vw;overflow:hidden}.app-container{display:flex;height:100vh;width:100%}.app-sidebar{width:260px;background-color:#fff;border-right:1px solid #e5e7eb;display:flex;flex-direction:column}.sidebar-header{padding:20px;border-bottom:1px solid #f3f4f6}.app-logo{font-size:20px;font-weight:700;color:#111827;display:flex;align-items:center;gap:10px}.sidebar-content{flex:1;padding:20px 10px;overflow-y:auto}.nav-section-title{font-size:12px;text-transform:uppercase;color:#9ca3af;margin-top:20px;margin-bottom:8px;padding-left:10px;font-weight:600}.sidebar-item{display:flex;align-items:center;padding:10px 12px;color:#4b5563;cursor:pointer;border-radius:8px;margin-bottom:4px;transition:all .2s}.sidebar-item:hover{background-color:#f9fafb;color:#111827}.sidebar-item.active{background-color:#eff6ff;color:#2563eb;font-weight:500}.sidebar-icon{margin-right:12px;font-size:18px}.sidebar-footer{padding:15px;border-top:1px solid #f3f4f6;position:relative}.user-profile{display:flex;align-items:center;gap:10px;cursor:pointer;padding:8px;border-radius:8px}.user-profile:hover{background-color:#f9fafb}.user-avatar{width:36px;height:36px;background-color:#3b82f6;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}.user-info{display:flex;flex-direction:column}.user-name{font-size:14px;font-weight:500;color:#1f2937}.user-role-badge{font-size:11px;color:#6b7280}.app-main{flex:1;background-color:#f9fafb;position:relative}.admin-chat-layout{display:flex;height:100%;background:#fff;border-radius:0}.device-list-sidebar{width:320px;border-right:1px solid #e5e7eb;display:flex;flex-direction:column;background-color:#fff}.device-list-header{padding:16px;border-bottom:1px solid #f3f4f6;display:flex;justify-content:space-between;align-items:center}.search-box{padding:12px 16px}.device-search-input{width:100%;padding:8px 12px;border:1px solid #e5e7eb;border-radius:6px;font-size:14px;outline:none}.device-search-input:focus{border-color:#3b82f6}.device-item{padding:12px 16px;display:flex;gap:12px;cursor:pointer;border-bottom:1px solid #f9fafb;transition:background .1s}.device-item:hover{background-color:#f9fafb}.device-item.active{background-color:#eff6ff}.device-avatar-small{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:16px;flex-shrink:0}.device-item-content{flex:1;min-width:0}.device-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.device-name{font-weight:500;color:#1f2937;font-size:14px}.device-preview-footer{display:flex;justify-content:space-between;align-items:center}.device-last-msg{font-size:13px;color:#6b7280;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block}.status-dot.online{background-color:#10b981}.status-dot.waiting{background-color:#d1d5db}.chat-main-area{flex:1;display:flex;flex-direction:column;background-color:#f9fafb}.chat-room-header{height:64px;background:#fff;border-bottom:1px solid #e5e7eb;padding:0 20px;display:flex;align-items:center;justify-content:space-between}.chat-header-user{display:flex;align-items:center;gap:12px}.chat-header-info h3{margin:0;font-size:16px;color:#111827}.chat-header-info p{margin:2px 0 0;font-size:12px;color:#6b7280}.chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:8px}.message-group{display:flex;flex-direction:column}.message-group.own{align-items:flex-end}.message-group.other{align-items:flex-start}.message-bubble{max-width:60%;padding:10px 14px;border-radius:12px;font-size:14px;line-height:1.4;position:relative;word-wrap:break-word}.message-group.own .message-bubble{background-color:#3b82f6;color:#fff;border-bottom-right-radius:2px}.message-group.other .message-bubble{background-color:#fff;color:#1f2937;border:1px solid #e5e7eb;border-bottom-left-radius:2px}.bot-bubble{border:1px solid #c7d2fe!important}.message-time-stamp{font-size:10px;opacity:.7;display:block;text-align:right;margin-top:4px}.chat-input-area{background:#fff;padding:16px 20px;border-top:1px solid #e5e7eb}.input-wrapper{display:flex;gap:10px}.chat-textarea{flex:1;padding:12px;border:1px solid #e5e7eb;border-radius:8px;font-size:14px;outline:none;resize:none;height:48px;font-family:inherit}.chat-textarea:focus{border-color:#3b82f6}.send-button{background-color:#3b82f6;color:#fff;border:none;border-radius:8px;width:48px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:18px;transition:background .2s}.send-button:hover:not(:disabled){background-color:#2563eb}.send-button:disabled{background-color:#9ca3af;cursor:not-allowed}