:root { --glass-blur: 18px; }

.glass-stage {
  position: relative;
  min-height: 60vh;
  overflow: hidden;
  background: linear-gradient(180deg, #fdf6ec 0%, #fbeee0 100%);
  isolation: isolate;
}

.glass-blobs {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}
/* かたまり自体はくっきりした輪郭にする。
   （ここをぼかすと、すりガラス越しでも見た目が変わらず効果が伝わらないため） */
.blob {
  position: absolute;
  border-radius: 50%;
  opacity: 0.9;
  filter: saturate(0.92);
  will-change: transform;
}
.blob--a {
  width: 44vw; height: 44vw;
  max-width: 400px; max-height: 400px;
  left: -4%; top: 2%;
  background: radial-gradient(circle at 38% 34%, #ffc46b 0%, var(--cl-orange) 62%, var(--cl-accent) 99%, transparent 100%);
  animation: blob-drift-a 13s ease-in-out infinite alternate;
}
.blob--b {
  width: 34vw; height: 34vw;
  max-width: 330px; max-height: 330px;
  right: -4%; top: 24%;
  background: radial-gradient(circle at 60% 38%, #ff9d4d 0%, var(--cl-accent) 64%, var(--cl-accent-hover) 99%, transparent 100%);
  animation: blob-drift-b 17s ease-in-out infinite alternate;
  animation-delay: -5s;
}
.blob--c {
  width: 26vw; height: 26vw;
  max-width: 250px; max-height: 250px;
  left: 16%; bottom: -6%;
  background: radial-gradient(circle at 48% 45%, #e8b07a 0%, var(--cl-orange-light) 62%, var(--cl-base) 99%, transparent 100%);
  animation: blob-drift-c 11s ease-in-out infinite alternate;
  animation-delay: -8s;
}
/* 小さな粒。輪郭が細かいものほど、すりガラスのぼかしの差がよく見える */
.blob--dot1, .blob--dot2, .blob--dot3 {
  width: 30px; height: 30px;
  background: var(--cl-accent);
}
.blob--dot1 { left: 34%; top: 16%; animation: blob-drift-b 9s ease-in-out infinite alternate; }
.blob--dot2 { right: 26%; bottom: 18%; width: 20px; height: 20px; background: var(--cl-orange); animation: blob-drift-a 8s ease-in-out infinite alternate; animation-delay: -3s; }
.blob--dot3 { left: 12%; top: 52%; width: 24px; height: 24px; background: var(--cl-orange-light); animation: blob-drift-c 10s ease-in-out infinite alternate; animation-delay: -6s; }

@keyframes blob-drift-a {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(22vw, 12vh) scale(1.15); }
  100% { transform: translate(38vw, -6vh) scale(0.95); }
}
@keyframes blob-drift-b {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(-24vw, 10vh) scale(0.9); }
  100% { transform: translate(-10vw, 26vh) scale(1.18); }
}
@keyframes blob-drift-c {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(18vw, -16vh) scale(1.12); }
  100% { transform: translate(34vw, -4vh) scale(0.92); }
}

.glass-panel {
  position: relative;
  z-index: 1;
  margin: 0 auto;
  width: min(560px, 88%);
  padding: 3rem 2rem;
  border-radius: 20px;
  background: rgba(255,255,255,0.32);
  border: 1px solid rgba(255,255,255,0.72);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: 0 20px 60px rgba(49,33,20,0.12);
  text-align: center;
}
.glass-panel p {
  margin: 0 0 1.6rem;
  color: var(--cl-brown);
  font-size: 0.92rem;
  line-height: 1.8;
}
.glass-slider-row label {
  display: block;
  font-size: 0.78rem;
  color: var(--cl-base);
  margin-bottom: 0.5rem;
}
.glass-slider-row input[type="range"] {
  width: 100%;
  accent-color: var(--cl-accent);
}

.glass-wrap {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 2rem 1.2rem;
}

@media (prefers-reduced-motion: reduce) {
  .blob { animation: none; }
}