.product-banner{background:#f0f8ff;padding:8px 10px;display:none;align-items:center;gap:8px;border-bottom:1px solid #dee2e6;font-size:13px;color:#333}.product-banner img{width:40px;height:40px;object-fit:contain;border-radius:4px;border:1px solid #eee}.product-banner .product-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.product-banner .close-banner{cursor:pointer;font-size:16px;color:#888;padding:0 2px}.chat-floating-container{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:12px;z-index:99999;font-family:Roboto,sans-serif;pointer-events:none}.chat-floating-container>*{pointer-events:auto}.float-btn{width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;text-decoration:none;box-shadow:0 4px 12px rgba(0,0,0,.2);transition:all .3s ease;cursor:pointer;color:#fff;font-size:26px;background-color:#007bff;border:none;position:relative}.float-phone{background-color:#e74c3c}.float-zalo{background-color:#0068ff}.chat-icon{background-color:#25d366}.float-btn:hover{transform:scale(1.05);opacity:.9}#unreadBadge{position:absolute;top:-5px;right:-5px;background:red;color:#fff;border-radius:50%;width:20px;height:20px;font-size:11px;display:none;align-items:center;justify-content:center}.chat-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.25);z-index:99998;display:none;pointer-events:auto}.chat-overlay.active{display:block}.chat-box{position:absolute;bottom:70px;right:0;width:380px;height:520px;background:#fff;border-radius:16px;box-shadow:0 5px 20px rgba(0,0,0,.2);display:none;flex-direction:column;overflow:hidden;border:1px solid #e9ecef;z-index:10000}.chat-header{background:#2c3e50;color:#fff;padding:0 16px;font-weight:600;font-size:15px;display:flex;justify-content:space-between;align-items:center;min-height:56px;flex-shrink:0}.chat-header span{display:flex;align-items:center;line-height:1.2}.chat-header button{background:0 0;border:none;color:#fff;font-size:22px;cursor:pointer;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:background .2s;flex-shrink:0;padding:0}.chat-header button:hover{background:rgba(255,255,255,.15)}.chat-header button:active{background:rgba(255,255,255,.25)}.chat-messages{flex:1;padding:12px;overflow-y:auto;background:#f8f9fa;display:flex;flex-direction:column;gap:8px;min-height:0}.chat-empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;text-align:center;padding:20px;color:#6c757d;font-size:14px;line-height:1.6;min-height:200px;margin:auto 0}.chat-empty-state .empty-icon{font-size:48px;margin-bottom:12px;opacity:.7}.chat-empty-state .empty-title{font-weight:600;color:#495057;margin-bottom:8px;font-size:16px}.chat-empty-state .empty-text{color:#868e96;max-width:280px}.message{max-width:80%;padding:8px 12px;border-radius:18px;font-size:13px;word-wrap:break-word;animation:msgFadeIn .2s ease}@keyframes msgFadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.user-message{background:#007bff;color:#fff;align-self:flex-end;border-bottom-right-radius:4px}.admin-message{background:#e9ecef;color:#212529;align-self:flex-start;border-bottom-left-radius:4px}.chat-input{display:flex;padding:10px 12px;border-top:1px solid #dee2e6;background:#fff;gap:8px;flex-shrink:0}.chat-input input{flex:1;border:1px solid #ced4da;border-radius:999px;padding:10px 16px;outline:0;font-size:14px;height:44px;transition:border-color .2s}.chat-input input:focus{border-color:#007bff;box-shadow:0 0 0 2px rgba(0,123,255,.15)}.chat-input button{background:#007bff;border:none;color:#fff;border-radius:50%;width:44px;height:44px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s ease;flex-shrink:0;font-size:18px}.chat-input button:active{transform:scale(.92);background-color:#0056b3}.chat-input button:disabled{opacity:.6;cursor:not-allowed;transform:none}.spinner{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.chat-overlay-desktop{display:none}@media (max-width:768px){.chat-floating-container{bottom:0;right:0;left:0;gap:0;z-index:99999!important;pointer-events:none}.chat-floating-container>*{pointer-events:auto}.float-btn{width:56px;height:56px;font-size:26px}.float-phone,.float-zalo{width:44px;height:44px;font-size:20px}.chat-icon,a.float-phone,a.float-zalo{position:fixed;bottom:calc(18px + env(safe-area-inset-bottom,0px));right:18px;z-index:99999}a.float-phone{bottom:calc(82px + env(safe-area-inset-bottom,0px));right:18px}a.float-zalo{bottom:calc(144px + env(safe-area-inset-bottom,0px));right:18px}.chat-icon{bottom:calc(18px + env(safe-area-inset-bottom,0px));right:18px}.chat-box{position:fixed!important;bottom:12px!important;left:12px!important;right:12px!important;width:auto!important;max-width:none!important;margin:0!important;height:min(588px,67dvh)!important;max-height:72dvh!important;min-height:448px!important;border-radius:18px!important;box-shadow:0 4px 24px rgba(0,0,0,.18)!important;z-index:99999!important}@media (max-height:600px){.chat-box{height:min(504px,72dvh)!important;min-height:336px!important}}.chat-header{padding:0 14px!important;font-size:15px!important;font-weight:700!important;min-height:56px!important;max-height:56px!important;position:relative}.chat-header::before{content:'';position:absolute;top:6px;left:50%;transform:translateX(-50%);width:32px;height:4px;background:rgba(255,255,255,.4);border-radius:4px}.chat-header button{font-size:22px!important;width:40px!important;height:40px!important;min-width:40px;min-height:40px;display:flex;align-items:center;justify-content:center}.chat-messages{background:#f9fafb;padding:12px!important}.chat-empty-state{justify-content:center;min-height:150px;padding:16px 20px;flex:1;display:flex;flex-direction:column;align-items:center;margin:auto 0}.chat-empty-state .empty-icon{font-size:44px;margin-bottom:10px}.chat-empty-state .empty-title{font-size:16px;font-weight:700}.chat-empty-state .empty-text{font-size:13px;max-width:260px}.message{max-width:88%!important;padding:8px 12px!important;font-size:14px!important}.chat-input{padding:10px 12px!important;padding-bottom:calc(10px + env(safe-area-inset-bottom,0px))!important;gap:8px;min-height:64px;border-top:1px solid #e5e7eb!important}.chat-input input{padding:10px 16px!important;font-size:15px!important;height:44px!important}.chat-input button{width:44px!important;height:44px!important;font-size:18px!important;margin-left:0!important;flex-shrink:0}.chat-floating-container.chat-open a.float-phone,.chat-floating-container.chat-open a.float-zalo{display:none!important}.chat-overlay{background:rgba(0,0,0,.2)}.chat-overlay.active{display:block}#unreadBadge{width:18px!important;height:18px!important;font-size:10px!important;top:-4px!important;right:-4px!important}}@media (max-width:380px){.chat-box{left:8px!important;right:8px!important;height:min(504px,64dvh)!important;max-height:70dvh!important;min-height:364px!important;border-radius:16px!important}.chat-header{padding:0 12px!important;font-size:14px!important;min-height:50px!important;max-height:50px!important}.message{font-size:13px!important;padding:7px 10px!important}.chat-input{padding:8px 10px!important;min-height:56px}.chat-input input{padding:8px 14px!important;font-size:14px!important;height:40px!important}.chat-input button{width:40px!important;height:40px!important;font-size:16px!important}}@supports (padding-bottom:env(safe-area-inset-bottom)){.chat-box{padding-bottom:0}}