styles.css

body {
    font-family: sans-serif;
    margin: 0;
    background: black;
}

h1 {
    opacity: 0;
}

video {
    width: 100vw;
    height: 100vh;
}

button {
    border-radius: 4px;
    cursor: pointer;
    padding: 10px 30px;
    background-color: #0060DF;
    border: solid 1px #0060DF;
    color: #FFF;
    pointer-events: all;
    transition: .2s ease;
    position: absolute;
    top: 20px;
    left: 20px;
    position: fixed;
}

.removed {
    opacity: 0;
    pointer-events: none;
}

.invisible {
    border: 1px solid #B1B1B3;
    background: white;
    color: #000;
    cursor: default;
    pointer-events: none;
}

.camView {
    cursor: pointer;
}

.highlighter p {
    padding: 5px;
    z-index: 2;
    font-size: 30px;
    color: white;
    position: absolute;
}

.highlighter {
    border: 2px solid white;
    box-shadow: 0 0 50px 0 white;
    z-index: 1;
    position: fixed;
    display: grid;
    place-content: center;
}

.background {
    width: 100%;
    position: fixed;
    z-index: -1000;
    left: 0;
    top: 0;
    background: black;
}