.graph-paper {
  /* Base background */
  background-color: #fbfbf8;

  /* Two layers: thin grid + thick grid */
  background-image:
    linear-gradient(to right, rgba(0,0,0,0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,0,0,0.06) 1px, transparent 1px),
    linear-gradient(to right, rgba(0,0,0,0.10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,0,0,0.10) 1px, transparent 1px);

  /* thin cell size, thick cell size */
  background-size:
    12px 12px,
    12px 12px,
    60px 60px,
    60px 60px;

  /* align layers */
  background-position:
    0 0,
    0 0,
    0 0,
    0 0;
}

/* Optional: soften behind content so cards pop */
.graph-paper .card,
.graph-paper .panel,
.graph-paper main {
  background: rgba(255,255,255,0.80);
  backdrop-filter: blur(2px);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 14px;
}