/* ==========================================================================
   ELM-O-SANAT 4-STAGE COLLABORATION CIRCUIT
   Architectural Hairline Step Cards | GPU Compositor Transitions
   ========================================================================== */

.circuit-section {
  position: relative;
  padding: 96px 0;
  background: radial-gradient(ellipse 80% 60% at 50% 50%, #071326 0%, #030812 65%, #02050b 100%);
  border-top: 1px solid rgba(227, 193, 110, 0.08);
  overflow: hidden;
}

.circuit-timeline {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

.circuit-step-card {
  background: linear-gradient(155deg, rgba(10, 20, 38, 0.72) 0%, rgba(4, 8, 16, 0.92) 100%);
  backdrop-filter: blur(18px);
  border: 1px solid var(--hairline-gold);
  border-radius: 18px;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s var(--ease-maybach), border-color 0.35s var(--ease-maybach), box-shadow 0.35s var(--ease-maybach);
  position: relative;
  text-align: right;
  box-shadow: inset 0 1px 0 rgba(251, 243, 222, 0.06);
}

.circuit-step-card:hover {
  transform: translate3d(0, -5px, 0);
  border-color: var(--hairline-gold-active);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.72), 0 0 24px rgba(212, 166, 68, 0.12);
}

.step-num-badge {
  font-size: 1.85rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: rgba(227, 193, 110, 0.36);
  line-height: 1;
  margin-bottom: 14px;
  transition: color 0.3s ease;
}

.circuit-step-card:hover .step-num-badge {
  color: var(--gold-200);
}

.step-title {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--text-pure-white);
  margin-bottom: 10px;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.78;
}

@media (max-width: 1024px) {
  .circuit-timeline {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 580px) {
  .circuit-timeline {
    grid-template-columns: 1fr;
  }
}