/*
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    border: 2px solid red;
    box-sizing: border-box;
    height: 100%;
    width: 100%;
    background: none;
    pointer-events: none;
    z-index:1000;
}
body::after {
    content: 'TEST';
    position: fixed;
    background-color: red;
    padding: 0.5rem 1rem;
    right: 0.3rem;
    bottom: 0.3rem;
    z-index: 1000;
}
*/