.scroll-stack {
  position: relative;
  isolation: isolate;
}

.scroll-stack-inner {
  position: relative;
  padding-bottom: 40vh; /* space for release */
}

.scroll-stack::before {
  content: '';
  position: absolute;
  inset: -10% 0 0 0;
  background:
    radial-gradient(60% 40% at 20% 0%, rgba(124,92,255,0.10) 0%, transparent 60%),
    radial-gradient(50% 35% at 85% 10%, rgba(35,196,169,0.10) 0%, transparent 60%);
  filter: blur(40px);
  z-index: -1;
  pointer-events: none;
}

.scroll-card {
  position: sticky;
  top: 20vh; /* stack position */
  transform-origin: top center;
  will-change: transform, filter;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  border: 1px solid #20222B;
  background: #111218;
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 20px 40px rgba(0,0,0,0.25);
  margin: 0 auto 100px; /* item distance */
  overflow: hidden;
}

.scroll-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  position: relative;
}

.scroll-card p {
  color: #A6ADBB;
  line-height: 1.7;
}

/* Heading accent bar */
.scroll-card h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: -12px;
  height: 4px;
  width: 72px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(124,92,255,0.9), rgba(35,196,169,0.9));
}

/* Variant colors matching theme */
.scroll-card.variant-purple { --c1: #7C5CFF; --c2: #A894FF; }
.scroll-card.variant-teal { --c1: #23C4A9; --c2: #7DE6D6; }
.scroll-card.variant-indigo { --c1: #4F46E5; --c2: #8B87F8; }
.scroll-card.variant-blue { --c1: #3A8FFF; --c2: #86BFFF; }
.scroll-card.variant-pink { --c1: #FF6DB3; --c2: #FFC2E0; }

/* Colored glow halo */
.scroll-card.variant-purple::before,
.scroll-card.variant-teal::before,
.scroll-card.variant-indigo::before,
.scroll-card.variant-blue::before,
.scroll-card.variant-pink::before {
  content: '';
  position: absolute;
  inset: -30px;
  background: radial-gradient(60% 50% at 20% 0%, color-mix(in srgb, var(--c1) 35%, transparent), transparent 70%),
              radial-gradient(50% 40% at 90% 10%, color-mix(in srgb, var(--c2) 30%, transparent), transparent 70%);
  filter: blur(50px);
  opacity: 0.45;
  pointer-events: none;
  z-index: -1;
}

/* Subtle colored edge */
.scroll-card.variant-purple { box-shadow: 0 20px 40px rgba(0,0,0,0.25), 0 0 0 1px rgba(124,92,255,0.35), 0 10px 60px rgba(124,92,255,0.25); }
.scroll-card.variant-teal { box-shadow: 0 20px 40px rgba(0,0,0,0.25), 0 0 0 1px rgba(35,196,169,0.35), 0 10px 60px rgba(35,196,169,0.22); }
.scroll-card.variant-indigo { box-shadow: 0 20px 40px rgba(0,0,0,0.25), 0 0 0 1px rgba(79,70,229,0.35), 0 10px 60px rgba(79,70,229,0.22); }
.scroll-card.variant-blue { box-shadow: 0 20px 40px rgba(0,0,0,0.25), 0 0 0 1px rgba(58,143,255,0.35), 0 10px 60px rgba(58,143,255,0.22); }
.scroll-card.variant-pink { box-shadow: 0 20px 40px rgba(0,0,0,0.25), 0 0 0 1px rgba(255,109,179,0.35), 0 10px 60px rgba(255,109,179,0.22); }

/* Organic shape overlays (decorative dots) */
.scroll-card::after {
  content: '';
  position: absolute;
  right: -60px;
  top: -40px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle at 30% 30%, color-mix(in srgb, var(--c2, #7C5CFF) 35%, transparent) 0%, transparent 60%),
              radial-gradient(circle at 70% 70%, color-mix(in srgb, var(--c1, #23C4A9) 35%, transparent) 0%, transparent 60%);
  filter: blur(30px);
  opacity: 0.35;
  pointer-events: none;
}

@media (min-width: 768px) {
  .scroll-card { padding: 2.5rem; border-radius: 28px; }
  .scroll-card h3 { font-size: 1.75rem; }
}