/* ModelGate user-side ambient background (dark theme only).
   Deep-space style adapted from design/homepage/index-c.html. */

#particle-bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    display: none;
}

body.has-particle-bg #particle-bg-canvas { display: block; }

/* Keep page content above the ambient layer. */
body.has-particle-bg .container { position: relative; z-index: 1; }

/* Interactive particle bursts (see particle-burst.js). */
#particle-burst-canvas {
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
}