:root {
    --bs-gradient: linear-gradient(to right, #007bff, #6610f2);
}

body {
    background: var(--bs-gradient);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    position: relative;
}

/* ... rest of your CSS ... */
canvas {
    display: block;
    background-color: #000;
    border: 1px solid #000;
    position: relative;
    z-index: 1;
}

.monitor {
    width: 800px;
    height: 600px;
    border: 45px solid grey;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    overflow: hidden;
    background: transparent;
    z-index: 2;
}

.monitor:after {
    content: "";
    position: absolute;
    bottom: -10%;
    left: 45%;
    width: 10%;
    height: 10%;
    background: grey;
}