header{position:fixed;top:0;left:0;right:0;height:64px;padding:0 24px;justify-content:space-between;background-color:#fff;box-shadow:0 1px 4px rgba(0,0,0,.08);z-index:1000;font-family:Segoe UI,sans-serif}#notificationBadge,header{display:flex;align-items:center}#notificationBadge{position:absolute;top:-4px;right:-6px;background:red;color:#fff;font-size:10px;width:16px;height:16px;border-radius:50%;justify-content:center;font-weight:700;box-shadow:0 0 2px rgba(0,0,0,.4)}#notificationPopup{display:none;position:absolute;top:42px;right:0;width:270px;background:#fff;box-shadow:0 4px 12px rgba(0,0,0,.2);border-radius:10px;padding:16px;font-size:14px;color:#333;animation:fadeIn .3s ease;z-index:1001}.spinner{border:5px solid #f3f3f3;border-top-color:#28a745;border-radius:50%;width:50px;height:50px;animation:spin 2s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}