:root {
    --primary: #3498db;
    --secondary: #2ecc71;
}

* {
    margin: 0;
}

body {
    background-color: aqua;
    overflow: hidden;
}

#canvas {
    background-color: black;
    border-radius: 10px; /* Optional: rounded corners */
    box-shadow: 0 0 30px 60px rgba(0, 0, 0, 1); /* Very dense shadow effect */
    border-image-slice: 1;
    border-radius: 10px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}