/* The System page — full redesign */

.system-hero {
  background: linear-gradient(165deg, var(--color-deep) 0%, var(--color-teal) 45%, var(--color-teal-light) 100%);
  color: #e8f0f2;
  padding: var(--space-xl) 0 var(--space-lg);
  text-align: center;
}

.system-hero h1 {
  color: #fff;
}

.system-hero .lead {
  color: rgba(232, 240, 242, 0.88);
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
}

.system-hero__stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.system-hero__stat {
  min-width: 7rem;
  padding: var(--space-sm) var(--space-md);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
}

.system-hero__stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-accent);
}

.system-hero__stat span {
  font-size: 0.75rem;
  opacity: 0.85;
}

.system-subnav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: var(--header-h);
  z-index: 100;
}

.system-subnav__inner {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-xs);
  padding: var(--space-sm) 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.system-subnav a {
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}

.system-subnav a:hover {
  color: var(--color-deep);
  background: var(--color-warm-bg-alt);
}

.system-subnav a.is-active {
  background: rgba(var(--rgb-gold), 0.15);
  color: var(--color-deep);
  font-weight: 600;
}

/* Platform pillars */
.system-pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.system-pillar {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}

.system-pillar:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.system-pillar__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-sm);
  color: var(--color-accent);
}

.system-pillar h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.system-pillar p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Interactive wall diagram */
.system-diagram {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.system-diagram__legend {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.system-layer-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.system-layer-btn:hover,
.system-layer-btn.is-active {
  border-color: var(--color-accent);
  background: rgba(var(--rgb-gold), 0.1);
  transform: translateX(4px);
}

.system-layer-btn__swatch {
  width: 12px;
  height: 36px;
  border-radius: 3px;
  flex-shrink: 0;
}

.system-layer-btn__swatch--interior { background: var(--color-warm-bg-alt); }
.system-layer-btn__swatch--structure { background: #8b7355; }
.system-layer-btn__swatch--exo { background: var(--color-teal-light); }
.system-layer-btn__swatch--exterior { background: #4a5f6b; }
.system-layer-btn__swatch--glazing { background: var(--color-accent); }

.system-layer-btn__text {
  flex: 1;
  min-width: 0;
}

.system-layer-btn__text strong {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
}

.system-layer-btn__hint {
  display: block;
  font-size: 0.6875rem;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

.system-diagram__canvas {
  background: linear-gradient(180deg, #f8f6f2 0%, #eef5f4 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow);
}

.system-diagram__figure {
  position: relative;
  margin: 0;
}

.system-diagram__photo {
  width: 100%;
  height: auto;
  display: block;
  border-radius: calc(var(--radius-lg) - 4px);
  transition: opacity 0.3s ease, filter 0.3s ease;
}

.system-diagram__overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.system-diagram__overlay [data-layer] rect {
  fill: transparent;
  stroke: transparent;
  stroke-width: 3;
  transition: fill 0.3s ease, stroke 0.3s ease, filter 0.3s ease;
}

.system-diagram__canvas svg {
  width: 100%;
  height: auto;
  display: block;
}

.system-diagram__canvas [data-layer] {
  transition: opacity 0.3s ease, filter 0.3s ease;
}

.system-diagram__canvas.is-dim .system-diagram__photo {
  opacity: 0.72;
  filter: saturate(0.85);
}

.system-diagram__canvas.is-dim [data-layer] rect {
  opacity: 0.35;
}

.system-diagram__canvas.is-dim [data-layer].is-highlight rect {
  opacity: 1;
  fill: rgba(var(--rgb-gold), 0.14);
  stroke: var(--color-accent);
  filter: drop-shadow(0 0 10px rgba(var(--rgb-gold), 0.45));
}

.system-diagram__detail {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  min-height: 4rem;
}

.system-diagram__detail p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Assembly steps */
.system-assembly {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  position: relative;
}

.system-assembly::before {
  content: "";
  position: absolute;
  top: 2.75rem;
  left: 10%;
  right: 10%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-teal-light));
  opacity: 0.35;
  z-index: 0;
}

.system-assembly__step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.system-assembly__num {
  width: 3rem;
  height: 3rem;
  margin: 0 auto var(--space-sm);
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-deep);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(var(--rgb-gold), 0.35);
}

.system-assembly__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-xs);
  color: var(--color-teal-light);
}

.system-assembly__step h3 {
  margin: 0 0 0.25rem;
  font-size: 0.9375rem;
}

.system-assembly__step p {
  margin: 0;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Compare conventional vs PM */
.system-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  max-width: 56rem;
  margin: 0 auto;
}

.system-compare__card {
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  overflow: hidden;
}

.system-compare__card--old {
  background: linear-gradient(160deg, #fff8f6 0%, #ffefe8 100%);
  border: 1px solid #f0d4cc;
}

.system-compare__card--new {
  background: linear-gradient(160deg, #eefaf9 0%, #e0f4f2 100%);
  border: 1px solid #b8e0dc;
}

.system-compare__card h3 {
  margin-top: 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.system-compare__count {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  margin: var(--space-sm) 0;
}

.system-compare__card--old .system-compare__count {
  color: #c45a3a;
}

.system-compare__card--new .system-compare__count {
  color: var(--color-teal-light);
}

.system-compare__steps-visual {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: var(--space-md) 0;
}

.system-compare__chip {
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.65);
}

.system-compare__card--new .system-compare__chip {
  background: rgba(var(--rgb-gold), 0.15);
  color: var(--color-deep);
}

.system-compare__bar {
  display: flex;
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  margin-top: var(--space-sm);
}

.system-compare__bar span {
  display: block;
  height: 100%;
}

.system-compare__bar .materials {
  background: var(--color-teal-light);
}

.system-compare__bar .labour {
  background: var(--color-cta);
}

.system-compare__ratio {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  margin-top: 0.35rem;
  color: var(--color-text-muted);
}

/* Performance metrics */
.system-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.system-metric {
  text-align: center;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.system-metric__icon {
  width: 44px;
  height: 44px;
  margin: 0 auto var(--space-sm);
  color: var(--color-accent);
}

.system-metric strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-teal-light);
  line-height: 1.1;
}

.system-metric span.label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-deep);
  margin: 0.25rem 0;
}

.system-metric span.hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.system-extreme-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.system-extreme-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.system-extreme-item svg {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  color: var(--color-accent);
}

.system-extreme-item p {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-deep);
  line-height: 1.35;
}

@media (max-width: 900px) {
  .system-subnav a {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding-top: 0.55rem;
    padding-bottom: 0.55rem;
  }
}

@media (max-width: 1000px) {
  .system-pillars,
  .system-assembly,
  .system-metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .system-diagram {
    grid-template-columns: 1fr;
  }

  .system-assembly::before {
    display: none;
  }
}

@media (max-width: 600px) {
  .system-pillars,
  .system-assembly,
  .system-metrics,
  .system-extreme-grid,
  .system-compare {
    grid-template-columns: 1fr;
  }
}