header {
    z-index: 1000;
    background-color: #fff;
    justify-content: space-between;
    align-items: center;
    height: 64px;
    padding: 0 24px;
    font-family: Segoe UI, sans-serif;
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    box-shadow: 0 1px 4px #00000014
}

#notificationBadge {
    color: #fff;
    background: red;
    border-radius: 50%;
    justify-content: center;
    align-items: center;
    width: 16px;
    height: 16px;
    font-size: 10px;
    font-weight: 700;
    display: flex;
    position: absolute;
    top: -4px;
    right: -6px;
    box-shadow: 0 0 2px #0006
}

#notificationPopup {
    color: #333;
    z-index: 1001;
    background: #fff;
    border-radius: 10px;
    width: 270px;
    padding: 16px;
    font-size: 14px;
    animation: .3s fadeIn;
    display: none;
    position: absolute;
    top: 42px;
    right: 0;
    box-shadow: 0 4px 12px #0003
}

.spinner {
    border: 5px solid #f3f3f3;
    border-top-color: #28a745;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: 2s linear infinite spin
}

@keyframes spin {
    0% {
        transform: rotate(0)
    }

    to {
        transform: rotate(360deg)
    }
}

@keyframes fadeIn {
    0% {
        opacity: 0;
        transform: translateY(-10px)
    }

    to {
        opacity: 1;
        transform: translateY(0)
    }
}