/* Each card remains in document flow; native scrolling builds the stack. */
.solution-stack {
  max-width: 1100px;
  padding-bottom: 110px;
  isolation: isolate;
}

.solution-stack .solution-card {
  position: relative;
  min-height: 600px;
  margin-bottom: 80px;
  padding: 62px 48% 62px 54px;
  border: 1px solid #d9e3e6;
  border-radius: 30px;
  background: #f0f5f7;
  box-shadow: 0 4px 8px #0b254507, 0 24px 55px #0b254518;
  overflow: hidden;
}

.solution-stack .solution-card:nth-child(2) { background: #edf3ef; }
.solution-stack .solution-card:nth-child(3) { background: #f7f8f9; }
.solution-stack .solution-card:nth-child(4) { background: #e9f1f3; }
.solution-stack .solution-card:nth-child(5) {
  background: #f1f5f2;
}
.solution-stack .solution-card:nth-child(6) { background: #f3f6f5; }
.solution-stack .solution-card h2 {
  font-size: clamp(30px, 3vw, 40px);
  line-height: 1.12;
  margin: 0 0 26px;
  letter-spacing: -0.04em;
}
.solution-stack .solution-card p { font-size: 16px; line-height: 1.7; }
.solution-art {
  position: absolute;
  width: 43%;
  right: 3%;
  top: 50%;
  transform: translateY(-50%);
  aspect-ratio: 1;
  pointer-events: none;
}
.art-orbit {
  position: absolute;
  inset: 8%;
  border: 1px solid #287c721a;
  border-radius: 50%;
  background: radial-gradient(ellipse, #287c7214, transparent 70%);
}
.art-orbit::before, .art-orbit::after {
  content: '';
  position: absolute;
  inset: 12%;
  border: 1px solid #287c7215;
  border-radius: 50%;
}
.art-orbit::after { inset: -12%; }
.solution-art svg {
  position: relative;
  width: 100%;
  height: 100%;
  stroke: #9cb4bc;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 18px 18px #0b254515);
  transform: rotate(-5deg);
  transition: transform 650ms ease;
}
.solution-card:nth-child(even) .solution-art svg { transform: rotate(4deg); }
.solution-card:hover .solution-art svg { transform: rotate(0deg) translateY(-6px); }
.solution-art rect { fill: #ffffff; }
.solution-art .art-accent { fill: #d5e8e2; stroke: #8fbcb0; }
.solution-art .art-float { fill: #f9fcfc; stroke: #709e9b; stroke-width: 2; }
.solution-art .art-check { stroke: #287c72; stroke-width: 4; }
.solution-art .art-route { stroke: #287c72; stroke-width: 3; stroke-dasharray: 5 7; }

@media (min-width: 1000px) and (min-height: 950px) and (prefers-reduced-motion: no-preference) {
  .solution-stack .solution-card {
    position: sticky;
    top: calc(160px + var(--card-index, 0) * 32px);
    margin-bottom: calc(80px + (var(--last-card-index, 5) - var(--card-index, 0)) * 32px);
    z-index: calc(1 + var(--card-index, 0));
  }
}

.stack-title {
  display: none;
  position: absolute;
  inset: 0 0 auto;
  height: 32px;
  padding: 0 54px;
  border: 0;
  background: transparent;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
}
.is-stacked .stack-title { display: block; }
.is-stacked h2 { opacity: 0; }
.stack-title:focus-visible { outline: 2px solid var(--teal); outline-offset: -4px; }
@media (prefers-reduced-motion: no-preference) {
  .is-stacked:has(.stack-title:hover) { animation: recipe-wiggle 420ms ease-in-out; }
}
@keyframes recipe-wiggle {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px) rotate(-0.12deg); }
  65% { transform: translateX(3px) rotate(0.12deg); }
}

@media (max-width: 999px) {
  .solution-stack .solution-card { padding: 40px 44% 40px 32px; min-height: 570px; margin-bottom: 32px; }
  .solution-art { right: 0; width: 42%; }
}
@media (max-width: 650px) {
  .solution-stack .solution-card { padding: 32px 26px 240px; min-height: 0; border-radius: 24px; }
  .solution-stack .solution-card h2 { font-size: 30px; }
  .solution-art { width: 240px; top: auto; bottom: 0; right: calc(50% - 120px); transform: none; }
  .solution-stack { padding-bottom: 40px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .solution-art svg, .solution-card:hover .solution-art svg { transition: none; transform: none; }
}