/* ==========================================================================
   MEMORIES — vertical chapter timeline
   ========================================================================== */

.memories {
  position: relative;
}

.memories__list {
  position: relative;
  margin-top: var(--sp-7);
  display: flex;
  flex-direction: column;
  gap: var(--sp-7);
}

.memories__spine {
  position: absolute;
  left: 28px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--c-line);
  border-radius: 2px;
}

.memories__spine-fill {
  position: absolute;
  left: 0; top: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(to bottom, var(--c-bio-cyan), var(--c-bio-gold));
  border-radius: 2px;
  transition: height 0.1s linear;
}

.memory-item {
  position: relative;
  padding-left: 78px;
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  scroll-snap-align: center;
}

.memory-item.is-visible { opacity: 1; transform: translateY(0); }

.memory-item__node {
  position: absolute;
  left: 14px;
  top: 6px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--c-deep);
  border: 2px solid var(--c-bio-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 0 rgba(62,198,224,0.5);
  transition: box-shadow 0.4s var(--ease-out);
}

.memory-item.is-visible .memory-item__node {
  box-shadow: 0 0 16px rgba(62, 198, 224, 0.45);
  animation: nodePulse 2.4s var(--ease-out) 1;
}

@keyframes nodePulse {
  0% { box-shadow: 0 0 16px rgba(62,198,224,0.45), 0 0 0 0 rgba(62,198,224,0.5); }
  60% { box-shadow: 0 0 16px rgba(62,198,224,0.45), 0 0 0 14px rgba(62,198,224,0); }
  100% { box-shadow: 0 0 16px rgba(62,198,224,0.45), 0 0 0 0 rgba(62,198,224,0); }
}

.memory-item__node-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--c-bio-cyan);
}

.memory-item__depth {
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  color: var(--c-bio-cyan-soft);
  letter-spacing: 0.05em;
}

.memory-item__card {
  margin-top: var(--sp-2);
  background: var(--c-panel);
  border: 1px solid var(--c-panel-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  backdrop-filter: var(--panel-blur);
  -webkit-backdrop-filter: var(--panel-blur);
  box-shadow: var(--shadow-card);
  max-width: 640px;
  transition: transform 0.45s var(--ease-out), border-color 0.45s var(--ease-out), box-shadow 0.45s var(--ease-out);
}

.memory-item__card:hover {
  transform: translateY(-4px);
  border-color: var(--c-panel-border-hover);
  box-shadow: var(--shadow-card-hover);
}

.memory-item__year {
  font-size: var(--fs-label);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--c-bio-gold);
  font-weight: 600;
}

.memory-item__title {
  margin-top: var(--sp-2);
  font-size: var(--fs-display-md);
  line-height: 1.15;
  color: var(--c-foam);
}

.memory-item__text {
  margin-top: var(--sp-3);
  color: var(--c-foam-dim);
  font-size: var(--fs-body);
  line-height: var(--lh-relaxed);
}

@media (max-width: 600px) {
  .memories__spine, .memory-item__node { left: 10px; }
  .memory-item { padding-left: 52px; }
  .memory-item__node { width: 24px; height: 24px; top: 4px; }
  .memory-item__card { padding: var(--sp-4); }
  .memory-item__card:hover { transform: none; }
}