/* Topographic contour background, drawn by background.js. */
.bg-field
{
  position:fixed;
  inset:0;
  width:100%;
  height:100%;
  display:block;
  pointer-events:none;
  z-index:0;
  /* Fade the lines toward the edges so they sit behind the content, not on it. */
  -webkit-mask-image:radial-gradient(ellipse 120% 90% at 70% 35%,#000 30%,transparent 100%);
  mask-image:radial-gradient(ellipse 120% 90% at 70% 35%,#000 30%,transparent 100%)
}
header,.hero,.work,.contact,footer
{
  position:relative;
  z-index:1
}