/* ==========================================================================
   BUILT FROM PRESSURE — DESIGN SYSTEM & ARCHITECTURAL STYLESHEET
   ========================================================================== */

:root {
  color-scheme: dark;
  
  /* Primary Architectural Palette */
  --c-limestone: #E6E2D8;
  --c-limestone-muted: #BDB6A6;
  --c-limestone-dim: rgba(230, 226, 216, 0.6);
  --c-limestone-faint: rgba(230, 226, 216, 0.08);
  --c-limestone-border: rgba(230, 226, 216, 0.16);

  --c-charcoal: #111312;
  --c-charcoal-elevated: #181B1A;
  --c-charcoal-surface: #222624;
  --c-charcoal-card: #1A1D1C;
  --c-charcoal-overlay: rgba(17, 19, 18, 0.82);

  --c-orange: #FF5500;
  --c-orange-bright: #FF661A;
  --c-orange-dim: rgba(255, 85, 0, 0.14);
  --c-orange-border: rgba(255, 85, 0, 0.38);

  --c-steel: #333836;
  --c-timber: #C49A6C;
  --c-glass: #7E9DA3;
  --c-concrete: #8C8982;

  /* Typography */
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Dimensions & Spacing */
  --header-height: 76px;
  --max-width: 1440px;
  --radius-sm: 2px;
  --radius-md: 4px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* --------------------------------------------------------------------------
   Reset & Base Standards
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-body);
  background-color: var(--c-charcoal);
  color: var(--c-limestone);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  overflow-x: hidden;
  min-height: 100vh;
  background-color: var(--c-charcoal);
  color: var(--c-limestone);
  font-size: 1rem;
  line-height: 1.6;
}

/* Subtle architectural grid background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(230, 226, 216, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(230, 226, 216, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 1;
}

/* Accessibility Skip Link */
.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1000;
  padding: 0.75rem 1.25rem;
  background: var(--c-orange);
  color: #000;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease-out);
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid #fff;
  outline-offset: 2px;
}

:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  padding: 0 clamp(1.25rem, 4vw, 3.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--c-charcoal-overlay);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-limestone-border);
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--c-limestone);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--c-orange);
  background: var(--c-orange-dim);
  color: var(--c-orange);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  position: relative;
}
.brand-mark::after {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 4px;
  height: 4px;
  background: var(--c-orange);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.1;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--c-orange);
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  color: var(--c-limestone-muted);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--c-limestone);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--c-orange);
}

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  padding: 0.55rem 1rem;
  background: var(--c-orange);
  color: #000;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, transform 0.2s ease;
}
.nav-cta:hover {
  background: var(--c-orange-bright);
  transform: translateY(-1px);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.motion-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.8rem;
  background: var(--c-limestone-faint);
  border: 1px solid var(--c-limestone-border);
  color: var(--c-limestone-muted);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}
.motion-toggle:hover {
  border-color: var(--c-limestone-muted);
  color: var(--c-limestone);
}
.motion-toggle .status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #39D353;
}
body.motion-off .motion-toggle .status-dot {
  background: #888;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--c-limestone-border);
  color: var(--c-limestone);
  padding: 0.5rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   SIGNATURE 3D HERO EXPERIENCE: .build-story
   -------------------------------------------------------------------------- */
.build-story {
  position: relative;
  height: 450vh;
  --progress: 0;
  z-index: 10;
}

.build-stage {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  background: radial-gradient(circle at 60% 45%, #1C2220 0%, #111312 70%);
}

#house-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}
#house-canvas:active {
  cursor: grabbing;
}

/* Technical datum backdrop grid */
.stage-grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: 
    linear-gradient(to right, rgba(230, 226, 216, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(230, 226, 216, 0.035) 1px, transparent 1px);
  background-size: 100px 100px;
}

/* Elevation Level Horizon Ruler */
.elevation-ruler {
  position: absolute;
  left: 2rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--c-limestone-dim);
  z-index: 20;
}
.elevation-tick {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.elevation-tick::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--c-limestone-border);
}
.elevation-tick.active {
  color: var(--c-orange);
  font-weight: 700;
}
.elevation-tick.active::before {
  background: var(--c-orange);
  width: 22px;
}

/* Floating Architectural Telemetry HUD (Top-Right) */
.stage-hud {
  position: absolute;
  top: calc(var(--header-height) + 1.5rem);
  right: clamp(1.25rem, 3.5vw, 3rem);
  width: min(340px, 90vw);
  background: rgba(18, 20, 19, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--c-limestone-border);
  border-left: 2px solid var(--c-orange);
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 25;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.hud-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--c-limestone-border);
}
.hud-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--c-orange);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.hud-phase-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--c-limestone);
}

.hud-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--c-limestone);
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.hud-desc {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--c-limestone-muted);
  margin-bottom: 1rem;
}

.hud-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 1rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--c-limestone-border);
}
.hud-metric {
  display: flex;
  flex-direction: column;
}
.hud-metric-label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-limestone-dim);
}
.hud-metric-val {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-limestone);
}

/* Stage Hero Title (Top-Left) */
.stage-hero-title {
  position: absolute;
  top: calc(var(--header-height) + 2rem);
  left: clamp(1.25rem, 5vw, 4.5rem);
  pointer-events: none;
  z-index: 20;
  max-width: 38rem;
}
.stage-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-orange);
  margin-bottom: 0.75rem;
}
.stage-kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--c-orange);
}
.stage-hero-title h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6.5vw, 6.2rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  color: var(--c-limestone);
}
.stage-hero-title h1 span.accent {
  color: var(--c-orange);
  font-weight: 400;
  font-style: italic;
  display: block;
}

/* Interactive Phase Timeline & Scrubber (Bottom Area) */
.stage-controls {
  position: absolute;
  bottom: 2rem;
  left: clamp(1.25rem, 4vw, 3.5rem);
  right: clamp(1.25rem, 4vw, 3.5rem);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  z-index: 30;
}

.phase-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.phase-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  background: rgba(18, 20, 19, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--c-limestone-border);
  color: var(--c-limestone-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}
.phase-pill:hover {
  border-color: var(--c-limestone-dim);
  color: var(--c-limestone);
}
.phase-pill.active {
  background: var(--c-orange);
  color: #000;
  border-color: var(--c-orange);
  font-weight: 700;
}
.phase-pill .pill-num {
  font-size: 0.6rem;
  opacity: 0.75;
}

.scrubber-bar-wrap {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.scrubber-track {
  position: relative;
  flex: 1;
  height: 4px;
  background: var(--c-limestone-border);
  border-radius: 2px;
  cursor: pointer;
}
.scrubber-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: calc(var(--progress) * 100%);
  background: var(--c-orange);
  border-radius: 2px;
  transition: width 0.05s linear;
}
.scrubber-thumb {
  position: absolute;
  top: 50%;
  left: calc(var(--progress) * 100%);
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  background: var(--c-orange);
  border: 2px solid #fff;
  border-radius: 50%;
  pointer-events: none;
  box-shadow: 0 0 10px rgba(255, 85, 0, 0.6);
}

.scrubber-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--c-limestone-dim);
  white-space: nowrap;
}
.scrubber-meta b {
  color: var(--c-orange);
  font-weight: 700;
}

/* View Mode Toggles (Perspective, Exploded, Ortho) */
.viewmode-controls {
  position: absolute;
  bottom: 6.5rem;
  right: clamp(1.25rem, 3.5vw, 3rem);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(18, 20, 19, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0.35rem;
  border: 1px solid var(--c-limestone-border);
  border-radius: var(--radius-sm);
  z-index: 30;
}
.viewmode-btn {
  background: transparent;
  border: 0;
  color: var(--c-limestone-muted);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.4rem 0.65rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}
.viewmode-btn:hover {
  color: var(--c-limestone);
}
.viewmode-btn.active {
  background: var(--c-limestone-faint);
  color: var(--c-orange);
  border: 1px solid var(--c-orange-border);
}

/* 3D Hotspot Datum Callouts */
.hotspot-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 24;
}
.hotspot-marker {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: auto;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-orange);
  background: rgba(18, 20, 19, 0.9);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--c-orange);
  border-radius: var(--radius-sm);
  transition: transform 0.2s ease, background-color 0.2s ease;
  white-space: nowrap;
}
.hotspot-marker:hover {
  transform: translate(-50%, -50%) scale(1.08);
  background: var(--c-orange);
  color: #000;
}
.hotspot-marker .marker-dot {
  width: 6px;
  height: 6px;
  background: currentColor;
  border-radius: 50%;
  animation: pulse-ring 2s infinite;
}
@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(255, 85, 0, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(255, 85, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 85, 0, 0); }
}

/* Reduced-Motion / Canvas Fallback Diagram */
.diagram-fallback {
  display: none;
  position: absolute;
  inset: 0;
  background: #151817;
  padding: 2rem;
  align-items: center;
  justify-content: center;
  z-index: 15;
}
body.motion-off .diagram-fallback {
  display: flex;
}
body.motion-off .build-story {
  height: auto;
  min-height: 90vh;
}
body.motion-off .build-stage {
  position: relative;
  height: auto;
  min-height: 85vh;
}
body.motion-off #house-canvas {
  opacity: 0.85;
}

/* --------------------------------------------------------------------------
   HOME PAGE: Supporting Architectural Sections
   -------------------------------------------------------------------------- */
.section-shell {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 8.5rem) clamp(1.25rem, 4vw, 3.5rem);
  z-index: 20;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--c-orange);
  margin-bottom: 1.25rem;
}
.kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--c-orange);
}

.section-lead-title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5.5vw, 4.8rem);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--c-limestone);
  margin-bottom: 2rem;
  max-width: 54rem;
}

/* Philosophy Section */
.philosophy-section {
  background: var(--c-charcoal-elevated);
  border-top: 1px solid var(--c-limestone-border);
  border-bottom: 1px solid var(--c-limestone-border);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
}

.philosophy-narrative p {
  font-size: clamp(1.05rem, 1.4vw, 1.28rem);
  line-height: 1.7;
  color: var(--c-limestone-muted);
  margin-bottom: 1.75rem;
}
.philosophy-narrative p strong {
  color: var(--c-limestone);
  font-weight: 600;
}

.tenets-stack {
  display: grid;
  gap: 1.25rem;
}

.tenet-card {
  background: var(--c-charcoal-card);
  border: 1px solid var(--c-limestone-border);
  padding: 1.5rem;
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.tenet-card:hover {
  border-color: var(--c-orange-border);
  transform: translateX(4px);
}
.tenet-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}
.tenet-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--c-orange);
}
.tenet-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-limestone);
}
.tenet-desc {
  font-size: 0.88rem;
  color: var(--c-limestone-muted);
  line-height: 1.55;
}

/* Material Studies Laboratory Section */
.material-lab-section {
  background: var(--c-charcoal);
  border-bottom: 1px solid var(--c-limestone-border);
}

.lab-layout {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.specimen-nav {
  display: grid;
  gap: 0.75rem;
}

.specimen-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1.1rem 1.25rem;
  background: var(--c-charcoal-card);
  border: 1px solid var(--c-limestone-border);
  color: var(--c-limestone);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}
.specimen-btn:hover {
  border-color: var(--c-limestone-dim);
  background: var(--c-charcoal-surface);
}
.specimen-btn.active {
  border-color: var(--c-orange);
  background: var(--c-charcoal-surface);
  box-shadow: inset 3px 0 0 var(--c-orange);
}
.specimen-btn-role {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--c-orange);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.specimen-display {
  background: var(--c-charcoal-card);
  border: 1px solid var(--c-limestone-border);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border-radius: var(--radius-sm);
  position: relative;
}

.swatch-visual-box {
  height: 220px;
  width: 100%;
  border: 1px solid var(--c-limestone-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 1.5rem;
  position: relative;
  background: #0A0C0B;
}
#material-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.specimen-details h3 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--c-limestone);
  margin-bottom: 0.4rem;
}
.specimen-role-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--c-orange);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.specimen-desc {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--c-limestone-muted);
  margin-bottom: 1.5rem;
}

.specimen-props-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--c-limestone-border);
}
.specimen-prop {
  display: flex;
  flex-direction: column;
}
.prop-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-limestone-dim);
  margin-bottom: 0.2rem;
}
.prop-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-limestone);
}

/* Construction Methodology / Pipeline Section */
.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.method-card {
  background: var(--c-charcoal-card);
  border: 1px solid var(--c-limestone-border);
  padding: 2rem 1.5rem;
  border-radius: var(--radius-sm);
  position: relative;
  display: flex;
  flex-direction: column;
}
.method-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--c-limestone-border);
}
.method-card:hover::before {
  background: var(--c-orange);
}
.method-step {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--c-orange);
  margin-bottom: 0.75rem;
}
.method-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--c-limestone);
  margin-bottom: 0.75rem;
}
.method-desc {
  font-size: 0.88rem;
  color: var(--c-limestone-muted);
  line-height: 1.55;
}

/* Bottom CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, #1C2220 0%, #111312 100%);
  border-top: 1px solid var(--c-limestone-border);
  padding: clamp(5rem, 10vw, 8rem) clamp(1.25rem, 4vw, 3.5rem);
  text-align: center;
  position: relative;
}
.cta-banner .kicker {
  justify-content: center;
}
.cta-banner h2 {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 6vw, 5.2rem);
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: -0.03em;
  margin: 0 auto 1.5rem;
  max-width: 50rem;
}
.cta-banner p {
  font-size: 1.15rem;
  color: var(--c-limestone-muted);
  max-width: 36rem;
  margin: 0 auto 2.5rem;
}

.button-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  background: var(--c-orange);
  color: #000;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  border: 0;
  cursor: pointer;
}
.button-primary:hover {
  background: var(--c-orange-bright);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(255, 85, 0, 0.35);
}

.button-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.75rem;
  background: transparent;
  color: var(--c-limestone);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-limestone-border);
  transition: all 0.2s ease;
  cursor: pointer;
}
.button-secondary:hover {
  border-color: var(--c-limestone);
  background: var(--c-limestone-faint);
}

/* --------------------------------------------------------------------------
   RESIDENCES PAGE: Concept Portfolio
   -------------------------------------------------------------------------- */
.residences-page {
  padding-top: calc(var(--header-height) + 2rem);
}

.residence-disclaimer-banner {
  background: rgba(255, 85, 0, 0.08);
  border: 1px solid var(--c-orange-border);
  padding: 1rem 1.5rem;
  margin-bottom: 3.5rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.disclaimer-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: #000;
  background: var(--c-orange);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.disclaimer-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-limestone-muted);
  line-height: 1.4;
}

.residence-cards-stack {
  display: grid;
  gap: 4.5rem;
}

.residence-card {
  background: var(--c-charcoal-card);
  border: 1px solid var(--c-limestone-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  transition: border-color 0.3s ease;
}
.residence-card:hover {
  border-color: var(--c-limestone-dim);
}

.residence-visual-pane {
  position: relative;
  min-height: 440px;
  background: #0D100F;
  border-right: 1px solid var(--c-limestone-border);
  overflow: hidden;
}

.iso-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.visual-controls-bar {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(18, 20, 19, 0.88);
  backdrop-filter: blur(10px);
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--c-limestone-border);
  border-radius: var(--radius-sm);
  z-index: 10;
}
.visual-layer-toggles {
  display: flex;
  gap: 0.4rem;
}
.layer-btn {
  background: transparent;
  border: 0;
  color: var(--c-limestone-dim);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.45rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.layer-btn.active {
  background: var(--c-limestone-faint);
  color: var(--c-orange);
  font-weight: 700;
}

.residence-info-pane {
  padding: clamp(1.75rem, 3.5vw, 3rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.residence-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.residence-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--c-orange);
  letter-spacing: 0.12em;
}
.residence-terrain-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--c-limestone-dim);
  text-transform: uppercase;
}

.residence-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--c-limestone);
  margin-bottom: 0.75rem;
}

.residence-idea {
  font-size: 0.95rem;
  color: var(--c-limestone-muted);
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.residence-specs-matrix {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1.25rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--c-limestone-border);
  border-bottom: 1px solid var(--c-limestone-border);
  margin-bottom: 1.5rem;
}
.res-spec-item {
  display: flex;
  flex-direction: column;
}
.res-spec-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-limestone-dim);
}
.res-spec-val {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-limestone);
}

.residence-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.intent-drawer-btn {
  background: none;
  border: 0;
  border-bottom: 1px solid var(--c-orange);
  color: var(--c-limestone);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-bottom: 0.25rem;
  cursor: pointer;
}
.intent-drawer-btn:hover {
  color: var(--c-orange);
}

.intent-drawer-panel {
  margin-top: 1.25rem;
  padding: 1.25rem;
  background: var(--c-charcoal-surface);
  border-left: 2px solid var(--c-orange);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.intent-drawer-panel p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--c-limestone-muted);
  margin-bottom: 0.5rem;
}
.intent-drawer-panel p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   BUILD BRIEF PAGE: Guided Enquiry & Live Calculation Engine
   -------------------------------------------------------------------------- */
.brief-page {
  padding-top: calc(var(--header-height) + 2rem);
}

.brief-grid-layout {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.brief-grid-layout > * {
  min-width: 0;
}

/* Step Wizard Form */
.brief-wizard-card {
  background: var(--c-charcoal-card);
  border: 1px solid var(--c-limestone-border);
  padding: clamp(1.75rem, 4vw, 3.5rem);
  border-radius: var(--radius-sm);
}

.wizard-steps-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--c-limestone-border);
}
.wizard-step-node {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--c-limestone-dim);
}
.wizard-step-node.active {
  color: var(--c-orange);
  font-weight: 700;
}
.wizard-step-node.completed {
  color: var(--c-limestone);
}
.step-node-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid currentColor;
  font-size: 0.65rem;
}
.wizard-step-node.active .step-node-num {
  background: var(--c-orange);
  color: #000;
  border-color: var(--c-orange);
}

.form-fieldset {
  border: 0;
  margin-bottom: 2rem;
}
.fieldset-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--c-limestone);
  margin-bottom: 0.5rem;
}
.fieldset-desc {
  font-size: 0.88rem;
  color: var(--c-limestone-muted);
  margin-bottom: 1.75rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.form-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-limestone);
}
.form-hint {
  font-size: 0.78rem;
  color: var(--c-limestone-dim);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  background: var(--c-charcoal-surface);
  border: 1px solid var(--c-limestone-border);
  color: var(--c-limestone);
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--c-orange);
  outline: none;
}
.form-select option {
  background: #181B1A;
  color: #E6E2D8;
}

.radio-tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
}
.radio-tile-label {
  display: block;
  cursor: pointer;
}
.radio-tile-label input[type="radio"],
.radio-tile-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.radio-tile {
  padding: 1rem;
  background: var(--c-charcoal-surface);
  border: 1px solid var(--c-limestone-border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: all 0.2s ease;
}
.radio-tile-label:hover .radio-tile {
  border-color: var(--c-limestone-dim);
}
.radio-tile-label input:checked + .radio-tile {
  border-color: var(--c-orange);
  background: rgba(255, 85, 0, 0.08);
  box-shadow: inset 0 0 0 1px var(--c-orange);
}
.tile-name {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-limestone);
}
.tile-sub {
  font-size: 0.75rem;
  color: var(--c-limestone-muted);
}

.wizard-nav-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-limestone-border);
}

.form-validation-error {
  color: #FF4D4D;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  margin-top: 0.4rem;
}

/* Live Architectural Specification HUD (Right Side) */
.brief-live-hud {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
  background: var(--c-charcoal-card);
  border: 1px solid var(--c-limestone-border);
  border-top: 3px solid var(--c-orange);
  padding: clamp(1.5rem, 3vw, 2rem);
  border-radius: var(--radius-sm);
}

.live-hud-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--c-limestone-border);
}
.live-hud-title h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-limestone);
}
.hud-pulse {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--c-orange);
  text-transform: uppercase;
}

.calc-metrics-stack {
  display: grid;
  gap: 1.1rem;
  margin-bottom: 1.75rem;
}
.calc-metric-box {
  background: var(--c-charcoal-surface);
  border: 1px solid var(--c-limestone-border);
  padding: 1rem;
  border-radius: var(--radius-sm);
}
.calc-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-limestone-dim);
  margin-bottom: 0.35rem;
}
.calc-value {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-limestone);
}
.calc-sub {
  font-size: 0.75rem;
  color: var(--c-limestone-muted);
  margin-top: 0.25rem;
}

.privacy-notice-box {
  background: rgba(230, 226, 216, 0.04);
  border: 1px dashed var(--c-limestone-border);
  padding: 0.9rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--c-limestone-muted);
  line-height: 1.5;
}
.privacy-notice-box b {
  color: var(--c-orange);
}

/* Dossier Output Modal / Success State */
.dossier-success-modal {
  display: none;
  background: var(--c-charcoal-card);
  border: 1px solid var(--c-orange);
  padding: clamp(2rem, 4vw, 3.5rem);
  border-radius: var(--radius-sm);
  margin-top: 2rem;
}
.dossier-success-modal.active {
  display: block;
  animation: fadeIn 0.4s var(--ease-out);
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.dossier-print-sheet {
  background: #151816;
  border: 1px solid var(--c-limestone-border);
  padding: 2rem;
  border-radius: var(--radius-sm);
  margin: 1.5rem 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: #0B0D0C;
  border-top: 1px solid var(--c-limestone-border);
  padding: clamp(3rem, 6vw, 5rem) clamp(1.25rem, 4vw, 3.5rem) 2.5rem;
  position: relative;
  z-index: 50;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand h4 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--c-limestone-muted);
  max-width: 24rem;
  line-height: 1.6;
}

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-orange);
  margin-bottom: 1rem;
}
.footer-links {
  list-style: none;
  display: grid;
  gap: 0.6rem;
}
.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-limestone-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}
.footer-links a:hover {
  color: var(--c-limestone);
}

.footer-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--c-limestone-border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--c-limestone-dim);
}

/* --------------------------------------------------------------------------
   Responsive Breakpoints & Recomposition
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .nav-toggle {
    display: block;
  }
  .site-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: #111312;
    padding: 2.5rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 2rem;
    overflow-y: auto;
    z-index: 99;
  }
  .site-nav.open {
    display: flex;
  }
  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    width: 100%;
  }
  .nav-link {
    font-size: 1.1rem;
  }
  .nav-cta {
    width: 100%;
    text-align: center;
    padding: 0.9rem;
    font-size: 0.85rem;
  }

  .philosophy-grid,
  .lab-layout,
  .residence-card,
  .brief-grid-layout,
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .residence-visual-pane {
    border-right: 0;
    border-bottom: 1px solid var(--c-limestone-border);
    min-height: 360px;
  }

  .stage-hud {
    display: none; /* Recomposed into bottom controls on mobile */
  }
  .elevation-ruler {
    display: none;
  }
  .stage-hero-title {
    top: calc(var(--header-height) + 1.25rem);
    left: 1.25rem;
    right: 1.25rem;
  }
  .viewmode-controls {
    display: none;
  }
  .stage-controls {
    bottom: 1.25rem;
    left: 1.25rem;
    right: 1.25rem;
  }
  .phase-pills {
    justify-content: flex-start;
  }
  .phase-pill {
    padding: 0.4rem 0.65rem;
    font-size: 0.62rem;
  }
}

@media (max-width: 540px) {
  .build-story {
    height: 380vh;
  }
  .brand-sub {
    display: none;
  }
  .footer-bottom-bar {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }
  .radio-tile-grid {
    grid-template-columns: 1fr;
  }
  .wizard-step-node > span:last-child {
    display: none;
  }
  .scrubber-meta {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Motion Sensitivity / Reduced Motion Mode
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body.motion-off *, body.motion-off *::before, body.motion-off *::after {
  animation-duration: 0.01ms !important;
  transition-duration: 0.01ms !important;
  scroll-behavior: auto !important;
}

/* --------------------------------------------------------------------------
   Print Stylesheet for Build Brief Dossier
   -------------------------------------------------------------------------- */
@media print {
  .site-header, .site-footer, .stage-controls, .wizard-nav-actions, .motion-toggle, .nav-toggle {
    display: none !important;
  }
  body {
    background: #fff !important;
    color: #000 !important;
  }
  .dossier-print-sheet {
    background: #fff !important;
    color: #000 !important;
    border: 2px solid #000 !important;
  }
}