/* Grid layout */

/* Main whiteboard container */
#whiteboard {
    width: 100vw;
    height: 100vh;
    position: relative;
    overflow: auto;
    background: var(--bg-image), var(--grid-bg);
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
}

/* Grid surface */
#grid {
    position: relative;
    width: var(--grid-element-size);
    height: var(--grid-element-size);
    min-width: 100%;
    min-height: 100%;
    background-image: radial-gradient(circle, var(--canvas-dot-color) var(--grid-dot-size), transparent var(--grid-dot-size));
    background-size: var(--grid-spacing) var(--grid-spacing);
    background-position: 0 0;
    /* Force GPU acceleration */
    will-change: transform;
    transform: translateZ(0);
}