/**
 * KALPA Digital Construction Visual System
 * Architectural layout grid, UI wireframe scaffolding, subtle technical lines
 * Seamlessly adapts between Warm Dark and Warm Editorial Light themes
 */

.construction-stage {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: var(--z-construction);
  contain: layout style paint;
}

/* Background Structural Grid */
.construction-grid-layer {
  position: absolute;
  top: -10%;
  left: -10%;
  width: 120%;
  height: 120%;
  background-size: 56px 56px;
  background-image: 
    linear-gradient(to right, var(--grid-line-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line-color) 1px, transparent 1px);
  mask-image: radial-gradient(ellipse 75% 65% at 50% 45%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 45%, #000 30%, transparent 80%);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

/* Scaffolding Vector Frame */
.construction-scaffold {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: var(--container-max);
  height: 80%;
  max-height: 680px;
  padding-inline: var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.scaffold-viewport {
  width: clamp(280px, 45vw, 620px);
  height: clamp(320px, 54vh, 520px);
  position: relative;
  border: 1px solid var(--scaffold-border);
  background: var(--scaffold-bg);
  border-radius: var(--radius-xs);
  box-shadow: 0 24px 50px -15px rgba(0, 0, 0, 0.35);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              background 0.3s ease,
              border-color 0.3s ease;
  will-change: transform;
}

/* Corner registration marks */
.scaffold-corner {
  position: absolute;
  width: 8px;
  height: 8px;
  border-color: var(--accent-cross);
}

.corner-tl {
  top: -1px;
  left: -1px;
  border-top: 2px solid;
  border-left: 2px solid;
}

.corner-tr {
  top: -1px;
  right: -1px;
  border-top: 2px solid;
  border-right: 2px solid;
}

.corner-bl {
  bottom: -1px;
  left: -1px;
  border-bottom: 2px solid;
  border-left: 2px solid;
}

.corner-br {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid;
  border-right: 2px solid;
}

/* Scaffolding Internal Wireframe Elements */
.scaffold-header-track {
  height: 40px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: 14px;
}

.scaffold-badge-pill {
  width: 48px;
  height: 7px;
  background-color: var(--border-default);
  border-radius: 2px;
}

.scaffold-nav-guides {
  display: flex;
  gap: 8px;
}

.scaffold-nav-guide {
  width: 28px;
  height: 4px;
  background-color: var(--border-subtle);
  border-radius: 1px;
}

/* Scaffolding Multi-column Grid Lines */
.scaffold-body-grid {
  height: calc(100% - 40px);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  padding: 18px 14px;
  position: relative;
}

.scaffold-col-line {
  border-right: 1px dashed var(--accent-line-subtle);
  height: 100%;
}

.scaffold-col-line:last-child {
  border-right: none;
}

/* Floating Wireframe Modules */
.scaffold-module-a {
  position: absolute;
  top: 26px;
  left: 20px;
  right: 140px;
  height: 100px;
  border: 1px solid var(--border-default);
  background-color: var(--scaffold-box-bg);
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.scaffold-module-b {
  position: absolute;
  bottom: 20px;
  left: 20px;
  width: 175px;
  height: 135px;
  border: 1px solid var(--border-default);
  background-color: var(--scaffold-box-bg);
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.scaffold-module-c {
  position: absolute;
  bottom: 20px;
  right: 20px;
  width: 200px;
  height: 155px;
  border: 1px solid var(--border-default);
  background-color: var(--scaffold-box-bg);
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Construction Coordinate HUD Label */
.scaffold-telemetry {
  position: absolute;
  bottom: -24px;
  left: 0;
  display: flex;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.scaffold-line-pulse {
  position: absolute;
  height: 1px;
  width: 100%;
  top: 50%;
  left: 0;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
  animation: scanLine 8s ease-in-out infinite alternate;
}

@keyframes scanLine {
  0% { transform: translateY(-100px); opacity: 0.2; }
  50% { opacity: 0.6; }
  100% { transform: translateY(100px); opacity: 0.2; }
}

/* ==========================================================================
   Reduced Motion & Mobile Adaptations
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .construction-grid-layer,
  .scaffold-viewport {
    transition: none !important;
    transform: none !important;
  }

  .scaffold-line-pulse {
    animation: none;
    opacity: 0.3;
  }
}

@media (max-width: 1024px) {
  .scaffold-viewport {
    opacity: 0.35;
    transform: scale(0.85);
  }
}

@media (max-width: 768px) {
  .scaffold-viewport {
    display: none;
  }

  .construction-grid-layer {
    opacity: 0.35;
  }
}