/* 全ページ共通の背景(固定レイヤー + スクロール連動)。bg-fx.js が .rzbg を挿入する */
.rzbg { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; background: #F7FAFF; }
.rzbg i { position: absolute; display: block; border-radius: 50%; will-change: transform; }
.rzbg .b1 { width: 900px; height: 900px; right: -260px; top: -240px; background: radial-gradient(circle, rgba(120,170,255,.30) 0%, rgba(120,170,255,0) 66%); }
.rzbg .b2 { width: 820px; height: 820px; left: -300px; bottom: -260px; background: radial-gradient(circle, rgba(90,220,150,.24) 0%, rgba(90,220,150,0) 66%); }
.rzbg .b3 { width: 620px; height: 620px; left: 38%; top: 30%; background: radial-gradient(circle, rgba(255,205,130,.20) 0%, rgba(255,205,130,0) 66%); }
.rzbg .dots { position: absolute; inset: 0; background-image: radial-gradient(#C2D0E8 1.2px, transparent 1.3px); background-size: 32px 32px; opacity: .45; will-change: transform; }
@media (max-width: 767px) {
  .rzbg .b1 { width: 560px; height: 560px; right: -240px; top: -160px; }
  .rzbg .b2 { width: 520px; height: 520px; left: -260px; bottom: -200px; }
  .rzbg .b3 { width: 400px; height: 400px; left: 20%; top: 36%; }
}

/* 旧デザインのページ(ブログ・LINE・リンク集)でも、同じ背景を見せる */
body.rzbg-old,
body.rzbg-old .post-page-body,
body.rzbg-old .blog-list-body,
body.rzbg-old .section-alt,
body.rzbg-old .line-reasons { background: transparent !important; }

.rzbg .rzp { position: absolute; left: 0; top: 0; display: block; border-radius: 50%; opacity: 0; will-change: transform, opacity; filter: blur(.4px); }