/**
 * VILLA SOLSTICE - Monolithic Cliffside Architectural Showcase
 * Haute Luxury Design System, Solar Simulation & Architectural Spatial Engine
 */

/* ==========================================================================
   1. Design Tokens & Semantic Variables
   ========================================================================== */
:root {
  /* Primitive Palette: Côte d'Azur Midnight, Navona Travertine & Champagne Gold */
  --color-riviera-deep: #06080d;
  --color-riviera-surface: #0a0e17;
  --color-riviera-card: #101624;
  --color-riviera-card-hover: #161e30;
  --color-riviera-border: rgba(245, 158, 11, 0.16);
  --color-riviera-border-hover: rgba(245, 158, 11, 0.45);

  /* Travertine Gold & Champagne Accents */
  --color-gold-400: #fbbf24;
  --color-gold-500: #f59e0b;
  --color-gold-600: #d97706;
  --color-gold-glow: rgba(245, 158, 11, 0.28);

  /* Mediterranean Azure */
  --color-azure-400: #38bdf8;
  --color-azure-500: #0ea5e9;
  --color-azure-glow: rgba(56, 189, 248, 0.25);

  /* Stone & Monolithic Text */
  --color-text-main: #f8fafc;
  --color-text-sub: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-text-faint: #64748b;

  /* Semantic Feedback */
  --color-emerald: #10b981;
  --color-coral: #f43f5e;

  /* Typography */
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Space Mono', monospace;

  /* Fluid Typography */
  --text-xs: clamp(0.72rem, 0.7rem + 0.12vw, 0.8rem);
  --text-sm: clamp(0.85rem, 0.82rem + 0.18vw, 0.925rem);
  --text-base: clamp(0.975rem, 0.94rem + 0.22vw, 1.05rem);
  --text-lg: clamp(1.125rem, 1.08rem + 0.35vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.18rem + 0.5vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.38rem + 0.8vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 1.68rem + 1.2vw, 2.375rem);
  --text-4xl: clamp(2.35rem, 2.05rem + 1.8vw, 3.25rem);
  --text-5xl: clamp(3rem, 2.45rem + 2.8vw, 4.5rem);

  /* Radii */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Elevation & Shadows */
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.75);
  --shadow-gold: 0 0 35px var(--color-gold-glow);

  /* Motion Curves */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --transition-fast: 0.18s var(--ease-smooth);
  --transition-base: 0.28s var(--ease-smooth);
  --transition-spring: 0.55s var(--ease-spring);
}

/* ==========================================================================
   2. Reset & Global Engine
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  background-color: var(--color-riviera-deep);
  color: var(--color-text-main);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  user-select: none;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* ==========================================================================
   3. Ambient Luminescence Backdrops
   ========================================================================== */
.ambient-glow {
  position: fixed;
  width: 55vw;
  height: 55vw;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(140px);
  opacity: 0.12;
}

.glow-azure {
  top: -15vw;
  right: -10vw;
  background: radial-gradient(circle, var(--color-azure-400) 0%, transparent 70%);
}

.glow-sunset {
  top: 55vh;
  left: -20vw;
  background: radial-gradient(circle, var(--color-gold-500) 0%, transparent 70%);
  opacity: 0.08;
  transition: opacity 0.5s ease;
}

/* ==========================================================================
   4. Layout Utilities & Helpers
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: 1.5rem;
  position: relative;
  z-index: 1;
}

.section {
  padding-block: clamp(4.5rem, 3.8rem + 4vw, 7.5rem);
  position: relative;
  z-index: 1;
}

.bg-surface {
  background-color: var(--color-riviera-surface);
  border-block: 1px solid var(--color-riviera-border);
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flex-align {
  display: flex;
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }

.pt-2 { padding-top: 0.5rem; }
.border-t { border-top: 1px solid rgba(255, 255, 255, 0.08); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }

.font-serif { font-family: var(--font-serif); }
.font-mono { font-family: var(--font-mono); }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.uppercase { text-transform: uppercase; }
.tracking-wider { letter-spacing: 0.08em; }
.block { display: block; }
.full-width { width: 100%; }
.flex-wrap { flex-wrap: wrap; }
.cursor-pointer { cursor: pointer; }

.text-white { color: #ffffff; }
.text-sub { color: var(--color-text-sub); }
.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }
.text-gold { color: var(--color-gold-400); }
.text-emerald { color: var(--color-emerald); }

.divider {
  color: var(--color-text-faint);
  opacity: 0.4;
}

.icon-xs {
  width: 14px;
  height: 14px;
  stroke-width: 2;
}

.icon-sm {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}

.icon-lg {
  width: 32px;
  height: 32px;
  stroke-width: 2;
}

/* Section Headers */
.section-header {
  max-width: 820px;
  margin-inline: auto;
  margin-bottom: clamp(2.5rem, 2rem + 2vw, 4rem);
}

.section-tag {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--color-gold-400);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--text-5xl);
  font-weight: 600;
  line-height: 1.08;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--color-text-sub);
  font-size: var(--text-base);
  line-height: 1.65;
}

/* ==========================================================================
   5. Buttons & Interactive States
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  will-change: transform;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0) scale(0.99);
}

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold-400) 0%, var(--color-gold-600) 100%);
  color: #06080d;
  font-weight: 700;
  box-shadow: 0 4px 20px var(--color-gold-glow);
}

.btn-gold:hover {
  background: linear-gradient(135deg, #ffffff 0%, var(--color-gold-400) 100%);
  box-shadow: 0 6px 28px rgba(245, 158, 11, 0.5);
}

.btn-outline-gold {
  border: 1px solid var(--color-riviera-border);
  color: #ffffff;
  background: rgba(245, 158, 11, 0.05);
}

.btn-outline-gold:hover {
  border-color: var(--color-gold-400);
  background: rgba(245, 158, 11, 0.12);
  color: var(--color-gold-400);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #ffffff;
  backdrop-filter: blur(8px);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-lg {
  padding: 1.05rem 2rem;
  font-size: var(--text-sm);
}

/* ==========================================================================
   6. Top Private Client Ribbon & Header
   ========================================================================== */
.top-client-bar {
  background: rgba(10, 14, 23, 0.95);
  border-bottom: 1px solid rgba(245, 158, 11, 0.15);
  padding-block: 0.45rem;
  position: relative;
  z-index: 100;
}

.ribbon-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-xs);
  background: var(--color-gold-500);
  color: #06080d;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(6, 8, 13, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-riviera-border);
  z-index: 90;
  padding-block: 0.95rem;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.site-header.scrolled {
  border-bottom-color: rgba(245, 158, 11, 0.35);
  background: rgba(6, 8, 13, 0.96);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-crest {
  color: var(--color-gold-400);
  display: grid;
  place-items: center;
}

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #ffffff;
  line-height: 1;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  color: var(--color-gold-400);
  margin-top: 2px;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
  position: relative;
  padding-block: 0.25rem;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: #ffffff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-gold-400);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  padding: 0.5rem;
  color: #ffffff;
}

/* ==========================================================================
   7. Mobile Navigation Drawer
   ========================================================================== */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 320px;
  height: 100dvh;
  background: var(--color-riviera-surface);
  border-left: 1px solid var(--color-riviera-border);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  box-shadow: -10px 0 35px rgba(0, 0, 0, 0.8);
  transition: transform var(--transition-spring);
  visibility: hidden;
}

.mobile-drawer.open {
  transform: translateX(-320px);
  visibility: visible;
}

.mobile-drawer-header {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.btn-close {
  font-size: 2rem;
  line-height: 1;
  color: var(--color-text-muted);
}

.mobile-drawer-links {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 1.5rem;
  flex: 1;
}

.mobile-nav-link {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-sub);
  padding: 0.65rem 0.5rem;
  border-radius: var(--radius-xs);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-gold-400);
}

.mobile-drawer-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   8. Hero Stage: Daylight-to-Dusk Lighting Simulator
   ========================================================================== */
.hero-viewport-stage {
  padding-top: clamp(2.5rem, 2rem + 2.5vw, 4.5rem);
  padding-bottom: clamp(3.5rem, 3rem + 3.5vw, 6rem);
  border-bottom: 1px solid var(--color-riviera-border);
}

.lighting-simulator-frame {
  position: relative;
  width: 100%;
  height: clamp(420px, 360px + 18vw, 680px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-riviera-border);
  box-shadow: var(--shadow-lg), 0 0 50px rgba(0, 0, 0, 0.9);
}

.villa-image-layer {
  position: relative;
  width: 100%;
  height: 100%;
}

.villa-hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.65s var(--ease-smooth);
}

#villaDuskImg {
  opacity: 0;
}

.lighting-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  transition: background 0.65s var(--ease-smooth);
}

.villa-floating-badge {
  position: absolute;
  z-index: 5;
  background: rgba(6, 8, 13, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-riviera-border);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.villa-floating-badge.top-left {
  top: 1.5rem;
  left: 1.5rem;
}

.villa-floating-badge.bottom-right {
  bottom: 1.5rem;
  right: 1.5rem;
  color: var(--color-gold-400);
}

.location-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold-400);
  box-shadow: 0 0 8px var(--color-gold-400);
}

/* Lighting Control Card */
.lighting-control-card {
  background: var(--color-riviera-card);
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  margin-top: 1.5rem;
  box-shadow: var(--shadow-md);
}

.solar-time-heading {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: #ffffff;
  margin-top: 0.2rem;
}

.time-presets-row {
  flex-wrap: wrap;
}

.time-preset-btn {
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  border: 1px solid var(--color-riviera-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-sub);
  transition: all var(--transition-fast);
}

.time-preset-btn:hover {
  border-color: var(--color-gold-400);
  color: #ffffff;
}

.time-preset-btn.active {
  background: rgba(245, 158, 11, 0.15);
  border-color: var(--color-gold-400);
  color: var(--color-gold-400);
}

.time-range-slider {
  width: 100%;
  accent-color: var(--color-gold-400);
  cursor: pointer;
  height: 6px;
  background: #1a2233;
  border-radius: 3px;
}

/* Key Metrics Ribbon */
.hero-specs-ribbon {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.spec-tile {
  background: var(--color-riviera-card);
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.spec-tile:hover {
  border-color: var(--color-gold-400);
  transform: translateY(-3px);
}

.spec-tile-num {
  font-size: 2.25rem;
  line-height: 1;
  color: #ffffff;
  font-weight: 600;
}

.spec-tile-unit {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-gold-400);
  letter-spacing: 0.1em;
  margin-top: 0.25rem;
}

.spec-tile-label {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* ==========================================================================
   9. Interactive Blueprints & Dimension Explorer
   ========================================================================== */
.blueprint-explorer-board {
  background: var(--color-riviera-card);
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 1.2rem + 1.5vw, 2.75rem);
  box-shadow: var(--shadow-lg);
}

.level-tabs-bar {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 1rem;
}

.level-tab-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-xs);
  border: 1px solid transparent;
  color: var(--color-text-sub);
  transition: all var(--transition-fast);
}

.level-tab-btn:hover {
  color: #ffffff;
}

.level-tab-btn.active {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--color-gold-400);
  color: #ffffff;
}

.level-tag {
  font-size: 0.68rem;
  color: var(--color-gold-400);
  letter-spacing: 0.1em;
}

.blueprint-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: center;
}

.blueprint-stage {
  background: #090c13;
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.blueprint-canvas-wrap {
  width: 100%;
  height: 400px;
}

.blueprint-svg {
  width: 100%;
  height: 100%;
}

.hotspot-group {
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.hotspot-group:hover {
  transform: scale(1.1);
}

.pulse-ring {
  animation: pulseBlueprint 2.5s infinite;
}

@keyframes pulseBlueprint {
  0% { r: 12; opacity: 0.8; }
  100% { r: 24; opacity: 0; }
}

/* Inspector Card */
.blueprint-inspector-card {
  background: var(--color-riviera-surface);
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.inspector-media {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.inspector-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.4s ease;
}

.inspector-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(6, 8, 13, 0.85);
  border: 1px solid var(--color-riviera-border);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-gold-400);
  backdrop-filter: blur(8px);
}

.inspector-details {
  padding: 1.5rem;
}

.inspector-title {
  font-size: 1.45rem;
  font-weight: 600;
  color: #ffffff;
}

.inspector-sqft {
  font-size: 0.85rem;
}

.inspector-desc {
  font-size: var(--text-sm);
  color: var(--color-text-sub);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.inspector-specs-list {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
}

/* ==========================================================================
   10. Architecture Grid
   ========================================================================== */
.architecture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.arch-card {
  background: var(--color-riviera-card);
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-md);
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.arch-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-gold-400);
}

.arch-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-xs);
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  color: var(--color-gold-400);
  display: grid;
  place-items: center;
  margin-bottom: 1.25rem;
}

.arch-icon-box i {
  width: 24px;
  height: 24px;
}

.arch-tag {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--color-gold-400);
  margin-bottom: 0.35rem;
}

.arch-title {
  font-size: 1.35rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.65rem;
  line-height: 1.25;
}

.arch-desc {
  font-size: var(--text-sm);
  color: var(--color-text-sub);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex: 1;
}

.arch-spec-pill {
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.72rem;
  color: var(--color-gold-400);
}

/* ==========================================================================
   11. Sanctuary Gallery (Masonry Grid)
   ========================================================================== */
.gallery-masonry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.gallery-tile {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 320px;
  border: 1px solid var(--color-riviera-border);
}

.gallery-tile.tile-wide {
  grid-column: span 2;
}

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-smooth);
}

.gallery-tile:hover .gallery-img {
  transform: scale(1.05);
}

.gallery-caption {
  position: absolute;
  inset: auto 0 0 0;
  background: linear-gradient(180deg, transparent 0%, rgba(6, 8, 13, 0.9) 100%);
  padding: 1.75rem 1.5rem 1.25rem;
}

.gallery-cat {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.gallery-heading {
  font-size: 1.35rem;
  font-weight: 600;
  color: #ffffff;
  line-height: 1.2;
}

/* ==========================================================================
   12. Private Wealth Acquisition Calculator
   ========================================================================== */
.wealth-calculator-card {
  background: var(--color-riviera-card);
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 1.2rem + 1.5vw, 2.75rem);
  box-shadow: var(--shadow-lg);
}

.wealth-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.wealth-col-title {
  font-size: 1.6rem;
  font-weight: 600;
  color: #ffffff;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 1.5rem;
}

.wealth-slider {
  width: 100%;
  accent-color: var(--color-gold-400);
  cursor: pointer;
  height: 6px;
  background: #1a2233;
  border-radius: 3px;
}

.facility-term-pills {
  flex-wrap: wrap;
}

.term-pill {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  border: 1px solid var(--color-riviera-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-sub);
  transition: all var(--transition-fast);
}

.term-pill:hover {
  border-color: var(--color-gold-400);
  color: #ffffff;
}

.term-pill.active {
  background: rgba(245, 158, 11, 0.15);
  border-color: var(--color-gold-400);
  color: var(--color-gold-400);
}

/* Results Column */
.results-board {
  background: var(--color-riviera-surface);
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.result-row.primary-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.monthly-figure {
  font-size: clamp(1.8rem, 1.5rem + 1vw, 2.5rem);
  line-height: 1.1;
}

.metrics-sub-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.metric-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xs);
  padding: 0.85rem;
}

/* ==========================================================================
   13. Bottom Callout
   ========================================================================== */
.bottom-cta-section {
  padding-block: clamp(5rem, 4rem + 4vw, 8rem);
  background: radial-gradient(circle at 50% 50%, rgba(245, 158, 11, 0.12) 0%, var(--color-riviera-deep) 80%);
  border-top: 1px solid var(--color-riviera-border);
}

.bottom-cta-heading {
  font-size: var(--text-5xl);
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  max-width: 820px;
  margin-inline: auto;
}

.bottom-cta-sub {
  font-size: var(--text-lg);
  color: var(--color-text-sub);
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: 2.25rem;
}

/* ==========================================================================
   14. Site Footer
   ========================================================================== */
.site-footer {
  background: #040508;
  border-top: 1px solid var(--color-riviera-border);
  padding-top: 4.5rem;
  padding-bottom: 2.5rem;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.footer-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 380px;
}

.footer-h {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.15rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links li a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-links li a:hover {
  color: var(--color-gold-400);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--color-text-faint);
}

.footer-legal a {
  color: var(--color-text-faint);
  transition: color var(--transition-fast);
}

.footer-legal a:hover {
  color: var(--color-text-sub);
}

/* ==========================================================================
   15. Private Viewing Modal (<dialog id="viewingModal">)
   Architecture: @starting-style, transition-behavior: allow-discrete, overlay
   ========================================================================== */
.viewing-modal-dialog, .confirmed-dialog {
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-lg);
  background: var(--color-riviera-surface);
  color: var(--color-text-main);
  box-shadow: var(--shadow-lg), 0 0 60px rgba(245, 158, 11, 0.2);
  width: min(92vw, 640px);
  max-height: 90dvh;
  overflow-y: auto;
  padding: 0;
  margin: auto;

  transition: opacity 0.3s ease, transform 0.3s var(--ease-spring), overlay 0.3s ease allow-discrete, display 0.3s ease allow-discrete;
  opacity: 0;
  transform: scale(0.95) translateY(16px);
}

.viewing-modal-dialog[open], .confirmed-dialog[open] {
  opacity: 1;
  transform: scale(1) translateY(0);
}

@starting-style {
  .viewing-modal-dialog[open], .confirmed-dialog[open] {
    opacity: 0;
    transform: scale(0.95) translateY(16px);
  }
}

.viewing-modal-dialog::backdrop, .confirmed-dialog::backdrop {
  background: rgba(4, 6, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  transition: opacity 0.3s ease, overlay 0.3s ease allow-discrete, display 0.3s ease allow-discrete;
}

.viewing-modal-dialog[open]::backdrop, .confirmed-dialog[open]::backdrop {
  opacity: 1;
}

@starting-style {
  .viewing-modal-dialog[open]::backdrop, .confirmed-dialog[open]::backdrop {
    opacity: 0;
  }
}

.viewing-modal-inner, .confirmed-content {
  padding: clamp(1.75rem, 1.5rem + 1.2vw, 2.75rem);
  position: relative;
}

.modal-close-btn {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--color-text-muted);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.05);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.modal-close-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
}

.modal-title {
  font-size: 1.85rem;
  font-weight: 600;
  color: #ffffff;
  margin-top: 0.25rem;
  margin-bottom: 0.5rem;
}

.modal-desc {
  font-size: var(--text-sm);
  color: var(--color-text-sub);
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.form-input {
  width: 100%;
  background: var(--color-riviera-card);
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-xs);
  padding: 0.75rem 1rem;
  color: #ffffff;
  font-size: var(--text-sm);
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  border-color: var(--color-gold-400);
}

.nda-checkbox-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-xs);
  padding: 0.85rem 1rem;
}

.confirmed-icon-badge {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.12);
  border: 1.5px solid var(--color-emerald);
  display: grid;
  place-items: center;
  margin: 0 auto 1.25rem;
}

.confirmed-title {
  font-size: 1.85rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.confirmed-desc {
  font-size: var(--text-sm);
  color: var(--color-text-sub);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.receipt-box {
  background: var(--color-riviera-card);
  border: 1px solid var(--color-riviera-border);
  border-radius: var(--radius-xs);
  padding: 1rem 1.25rem;
}

/* ==========================================================================
   16. Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-specs-ribbon {
    grid-template-columns: repeat(3, 1fr);
  }
  .blueprint-grid {
    grid-template-columns: 1fr;
  }
  .architecture-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .gallery-masonry-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .wealth-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hide-mobile {
    display: none;
  }
  .hero-specs-ribbon {
    grid-template-columns: 1fr;
  }
  .architecture-grid {
    grid-template-columns: 1fr;
  }
  .gallery-masonry-grid {
    grid-template-columns: 1fr;
  }
  .gallery-tile.tile-wide {
    grid-column: span 1;
  }
  .form-grid-2 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   17. Accessible Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  .villa-hero-img,
  .lighting-overlay,
  .btn,
  .arch-card,
  .spec-tile {
    transition: none !important;
    transform: none !important;
  }
  .pulse-ring {
    animation: none !important;
  }
}