html,body {
    margin: 0;
    height: 100%;
    background-color: rgb(20, 20, 20);
}

.screen {
    overflow-y: scroll;
    width: 100%;
    height: 100%;
    filter: url(#crtOverlay);

    box-sizing: border-box;
    padding: 100px;
    
    background-color: black;
}

.frame {
    position: fixed;
    z-index: 10;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;

    overflow: hidden;
    pointer-events: none;
}

/* animation */
.screen {
    animation: crtBurnin 3s ease-in;
}

@keyframes crtBurnin {
    0% {
        opacity: 0;
    }

    10% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}