h1 {
	color: red;
}

.wrapper {
    display: block;
}

#sidebar {
    min-width: 250px;
    max-width: 250px;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    /* top layer */
    z-index: 9999;
}

.overlay {
    /* full screen */
    width: 100vw;
    height: 100vh;
    /* transparent black */
    background: rgba(0, 0, 0, 0.8);
    position: fixed;
    top: 0;
    left: 0;
    display: none;
    /* middle layer, i.e. appears below the sidebar */
    z-index: 9998;
}

#dismiss {
    width: 35px;
    height: 35px;
    position: absolute;
    /* top right corner of the sidebar */
    top: 10px;
    right: 10px;
}