.build-section {
  width: 100%;
  background: #0b0c0e; /* Dark contrasting background */
  position: relative;
  overflow: hidden;
}

.build-container {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 4rem 2rem;
  gap: 4rem;
}

.build-text {
  flex: 1;
  max-width: 480px;
  z-index: 10;
}

.build-text h2 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: 1.1;
  margin: 1rem 0 1.5rem;
  color: #ffffff;
}

.build-steps-indicators {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-indicator {
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.3);
  padding-left: 1rem;
  border-left: 2px solid rgba(255, 255, 255, 0.1);
  transition: all 0.4s ease;
}

.step-indicator.active {
  color: #ffffff;
  border-left-color: #3b82f6; /* Sleek active flair color */
  transform: translateX(6px);
}

/* 3D Scene Viewport */
.build-visual {
  flex: 1.2;
  height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.scene-3d {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 4 / 3;
  perspective: 1600px;
  perspective-origin: 50% 35%;
}

.assembly-wrapper {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
}

/* Individual 3D Panels */
.assembly-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transform-style: preserve-3d;
  padding: 1.5rem;
  box-sizing: border-box;
}

.layer-tag {
  position: absolute;
  top: 12px;
  left: 15px;
  font-family: monospace;
  font-size: 0.7rem;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, 0.4);
}

/* Layer 1 Elements (Grid) */
.mock-grid-lines {
  width: 100%;
  height: 100%;
  opacity: 0.25;
  background-size: 30px 30px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.15) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.15) 1px, transparent 1px);
  border: 1px dashed rgba(255, 255, 255, 0.3);
  border-radius: 8px;
}

/* Layer 2 Elements (UI) */
.mock-ui-nav {
  width: 90%;
  height: 16px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  margin: 1.5rem auto 1rem;
}
.mock-ui-hero {
  width: 55%;
  height: 40%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  margin-left: 5%;
}
.mock-ui-cards {
  display: flex;
  gap: 10px;
  width: 90%;
  margin: 1.5rem auto 0;
}
.mock-ui-cards span {
  flex: 1;
  height: 45px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 6px;
}

/* Layer 3 Elements (Text) */
.mock-text-heading {
  width: 45%;
  height: 18px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 3px;
  margin: 4.5rem 0 0 5%;
}
.mock-text-line {
  width: 35%;
  height: 8px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 2px;
  margin: 0.8rem 0 0 5%;
}
.mock-text-line.short { width: 20%; }
.mock-text-block {
  width: 25%;
  height: 10px;
  background: rgba(255, 255, 255, 0.3);
  margin: 4.8rem 0 0 8%;
  border-radius: 2px;
}

/* Layer 4 Elements (Flair) */
.mock-accent-dot {
  position: absolute;
  top: 4.6rem;
  left: 52%;
  width: 8px;
  height: 8px;
  background: #3b82f6;
  border-radius: 50%;
  box-shadow: 0 0 15px #3b82f6;
}
.mock-accent-btn {
  width: 100px;
  height: 28px;
  background: transparent;
  border: 1px solid #3b82f6;
  border-radius: 20px;
  margin: 1.5rem 0 0 5%;
  transform: translateY(18px);
}
.mock-accent-shape {
  position: absolute;
  right: 10%;
  top: 30%;
  width: 80px;
  height: 80px;
  border-right: 2px solid rgba(59, 130, 246, 0.3);
  border-top: 2px solid rgba(59, 130, 246, 0.3);
  border-radius: 0 12px 0 0;
}

/* Responsive Handling */
@media (max-width: 992px) {
  .build-container {
    flex-direction: column;
    justify-content: center;
    padding: 6rem 1.5rem;
    gap: 2rem;
  }
  .build-text {
    max-width: 100%;
    text-align: center;
  }
  .build-steps-indicators {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    margin-top: 1.5rem;
  }
  .step-indicator {
    border-left: none;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    padding-left: 0;
    padding-bottom: 4px;
  }
  .step-indicator.active {
    border-bottom-color: #3b82f6;
    transform: translateY(-2px);
  }
  .build-visual {
    width: 100%;
    height: 50vh;
  }
}