style.css

body {
    height: 100vh;
    margin: 0;
    background: linear-gradient(to bottom, #222, black);
    color: white;
    font-family: Verdana, sans-serif;
}

main, .content, .options {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

main {
    flex-direction: row;
    gap: 1rem;
}

.canvas-container {
    position: relative;
    width: 800px;
    height: 800px;
}

.options {
    padding: 1rem;
    align-items: baseline;
    gap: 1rem;

    label {
        width: 12rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    input, button {
        width: 8rem;

        &:hover {
            cursor: pointer;
        }
    }
}

button {
    background-color: royalblue;
    border: none;
    color: white;
    padding: 0.1rem 1rem;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 1.5rem;

    &:hover {
        background-color: dodgerblue;
        cursor: pointer;
    }
}

canvas {
    width: 800px;
    height: 800px;
    position: absolute;
    top: 0;
}

ul > li {
    line-height: 1.5rem;
}