/* ========================================
   BIODYN , The loop
   Five stages on a ring that closes.
   ======================================== */

.cy-section { padding: var(--section-padding); }

.cy-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--container-padding);
}

.cy-head {
  display: grid;
  grid-template-columns: minmax(0, 1.24fr) minmax(0, 0.76fr);
  column-gap: clamp(30px, 4vw, 66px);
  align-items: end;
}

.cy-title {
  font-family: var(--ab-font-display);
  font-weight: 400;
  font-size: clamp(1.9rem, 3.2vw + 0.3rem, 3.2rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--ab-bone);
}

.cy-title em { font-style: italic; color: var(--ab-ch); }

.cy-lede {
  font-size: clamp(0.92rem, 0.42vw + 0.8rem, 1.02rem);
  line-height: 1.75;
  color: var(--ab-dim);
  max-width: 46ch;
  padding-bottom: 0.4em;
}

.cy-rail {
  display: flex;
  margin-top: clamp(26px, 4vh, 44px);
  border-bottom: 1px solid var(--ab-line);
}

.cy-stage {
  position: relative;
  flex: 1 1 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 14px 16px 0;
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--ab-faint);
  font-family: var(--ab-font-display);
  font-size: clamp(0.95rem, 0.55vw + 0.8rem, 1.2rem);
  transition: color var(--transition-medium);
}

.cy-stage::after {
  content: '';
  position: absolute;
  left: 0; right: 10px; bottom: -1px;
  height: 1px;
  background: var(--ab-ch);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.5s cubic-bezier(0.22, 0.7, 0.2, 1);
}

.cy-stage.is-active::after { transform: scaleX(1); }
.cy-stage.is-active, .cy-stage:hover { color: var(--ab-bone); }

.cy-stage-dot {
  width: 7px; height: 7px; flex: none;
  border-radius: 50%;
  border: 1px solid var(--ab-ch);
  transition: background-color var(--transition-medium), box-shadow var(--transition-medium);
}

.cy-stage.is-active .cy-stage-dot {
  background: var(--ab-ch);
  box-shadow: 0 0 10px var(--ab-ch);
}

.cy-body {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 4vw, 62px);
  align-items: center;
  margin-top: clamp(24px, 3.5vh, 40px);
}

.cy-chamber { position: relative; width: 100%; height: clamp(280px, 32vw, 400px); }

.cy-canvas {
  display: block; width: 100%; height: 100%;
  cursor: grab; touch-action: pan-y;
}
.cy-canvas.is-dragging { cursor: grabbing; }

.cy-panel.is-entering { animation: cy-in 0.55s cubic-bezier(0.22, 0.7, 0.2, 1); }
@keyframes cy-in { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

.cy-panel-title {
  font-family: var(--ab-font-display);
  font-weight: 400;
  font-size: clamp(1.35rem, 1.4vw + 0.8rem, 2rem);
  line-height: 1.15;
  color: var(--ab-bone);
  margin-bottom: 12px;
  max-width: 24ch;
}

.cy-panel-body {
  font-size: 0.98rem;
  line-height: 1.78;
  color: var(--ab-dim);
  max-width: 56ch;
}

@media (max-width: 1000px) {
  .cy-head { grid-template-columns: minmax(0, 1fr); row-gap: 18px; }
  .cy-lede { max-width: 60ch; padding-bottom: 0; }
  .cy-body { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .cy-chamber { height: min(320px, 68vw); }
}

@media (max-width: 760px) {
  .cy-rail { flex-direction: column; }
  .cy-stage { padding: 12px 0; border-top: 1px solid var(--ab-line); }
  .cy-stage:first-child { border-top: 0; }
  .cy-stage::after { bottom: auto; top: 0; right: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cy-stage::after { transition: none; }
  .cy-panel.is-entering { animation: none; }
}