.engineering-grid {
    background-color: #111115;

    background-image:
    /* minor grid */
    linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px),

    /* major grid */
    linear-gradient(to right, rgba(255,255,255,0.12) 2px, transparent 2px),
    linear-gradient(to bottom, rgba(255,255,255,0.12) 2px, transparent 2px);

    background-size:
    20px 20px,
    20px 20px,
    100px 100px,
    100px 100px;
}