/* ==========================================================================
   Technology Ecosystem — interactive capability explorer
   Left: selectable list. Right: detail panel that morphs on selection.
   ========================================================================== */

.ecosystem { padding: var(--space-7) 0; }

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-5);
}

.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 900px) {
  .eco-grid { grid-template-columns: 0.85fr 1.15fr; gap: var(--space-4); align-items: start; }
}

.eco-list {
  display: flex;
  flex-direction: column;
}

.eco-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 26px 4px;
  border-top: 1px solid var(--hairline);
  cursor: pointer;
  transition: padding-left 0.3s var(--ease-out);
}

.eco-item:last-child { border-bottom: 1px solid var(--hairline); }

.eco-item:hover, .eco-item.active { padding-left: 14px; }

.eco-item-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--silver-dim);
  min-width: 26px;
}

.eco-item-title {
  flex: 1;
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--silver);
  transition: color 0.3s ease;
}

.eco-item.active .eco-item-title,
.eco-item:hover .eco-item-title { color: var(--paper); }

.eco-item-arrow {
  width: 20px;
  height: 20px;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  color: var(--cyan);
}

.eco-item.active .eco-item-arrow { opacity: 1; transform: translateX(0); }

.eco-detail {
  position: sticky;
  top: 120px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  background: var(--graphite);
  padding: var(--space-4);
  min-height: 340px;
  overflow: hidden;
}

.eco-detail-panel {
  display: none;
}
.eco-detail-panel.active {
  display: block;
  animation: eco-panel-in 0.35s var(--ease-out);
}

@keyframes eco-panel-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.eco-detail-panel .mono-label { margin-bottom: 18px; }

.eco-detail-panel h3 {
  font-size: clamp(22px, 2.6vw, 30px);
  margin-bottom: 16px;
}

.eco-detail-panel p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--paper-dim);
  max-width: 480px;
}

.eco-detail-visual {
  margin-top: var(--space-3);
  height: 160px;
  border-radius: var(--radius-md);
  border: 1px solid var(--hairline-soft);
  background:
    linear-gradient(135deg, rgba(95,212,216,0.06), rgba(139,124,246,0.05));
  position: relative;
  overflow: hidden;
}

.eco-detail-visual .grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--hairline-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--hairline-soft) 1px, transparent 1px);
  background-size: 28px 28px;
}