/* ==========================================================================
   HAEKYENG ART | FINE ART & DESIGN PORTFOLIO
   Design System: Contemporary Luxury Gallery & Museum Aesthetic
   ========================================================================== */

:root {
  /* Color Palette - Gallery Dark (Default) */
  --bg-primary: #0a0b0d;
  --bg-secondary: #121417;
  --bg-surface: #181b20;
  --bg-surface-elevated: #22262d;
  --bg-glass: rgba(18, 20, 23, 0.75);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-accent: rgba(212, 175, 55, 0.4);
  
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  --gold-accent: #d4af37;
  --gold-light: #f3e5ab;
  --gold-glow: rgba(212, 175, 55, 0.25);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.7);
  --shadow-art: 0 24px 60px rgba(0, 0, 0, 0.8), 0 4px 12px rgba(0, 0, 0, 0.5);

  --font-serif: 'Playfair Display', 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --container-max: 1520px;
}

[data-theme="light"] {
  --bg-primary: #f8f7f4;
  --bg-secondary: #edebe6;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #fbfbf9;
  --bg-glass: rgba(255, 255, 255, 0.85);
  
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-medium: rgba(0, 0, 0, 0.16);
  --border-accent: rgba(180, 140, 30, 0.4);
  
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-muted: #8c8c96;
  
  --gold-accent: #9d7b1d;
  --gold-light: #5f4a0e;
  --gold-glow: rgba(180, 140, 30, 0.15);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.12);
  --shadow-art: 0 24px 60px rgba(0, 0, 0, 0.15), 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  position: relative;
}

/* Background Subtle Canvas Grain */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  z-index: 1;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, select, textarea {
  font-family: inherit;
}

/* Layout Utilities */
.container {
  width: 92%;
  max-width: var(--container-max);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

/* Typography Helpers */
.serif-heading {
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.eyebrow {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--gold-accent);
  font-weight: 600;
  display: inline-block;
  margin-bottom: 0.75rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  transition: transform var(--transition-smooth), background var(--transition-smooth);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: 0.15em;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.1;
}

.brand-sub {
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--gold-accent);
  transition: width var(--transition-smooth);
}

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

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

.theme-toggle-btn, .header-search-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover, .header-search-btn:hover {
  border-color: var(--gold-accent);
  color: var(--gold-accent);
  background: var(--bg-surface);
}

.btn-inquire-nav {
  padding: 0.6rem 1.4rem;
  border: 1px solid var(--gold-accent);
  color: var(--gold-accent);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-smooth);
  background: transparent;
  cursor: pointer;
}

.btn-inquire-nav:hover {
  background: var(--gold-accent);
  color: #000000;
  box-shadow: 0 0 20px var(--gold-glow);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section: Masterpiece Showcase
   ========================================================================== */

.hero-section {
  min-height: 92vh;
  padding-top: 130px;
  padding-bottom: 60px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-ambient-glow {
  position: absolute;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.08) 0%, rgba(217, 70, 70, 0.05) 40%, transparent 70%);
  top: 15%;
  right: 10%;
  pointer-events: none;
  z-index: 1;
  filter: blur(80px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 680px;
}

.hero-title {
  font-size: clamp(2.8rem, 5.2vw, 4.8rem);
  line-height: 1.08;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero-title span {
  font-style: italic;
  font-weight: 400;
  color: var(--gold-accent);
}

.hero-statement {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  font-weight: 300;
  border-left: 2px solid var(--gold-accent);
  padding-left: 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-bottom: 3.5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--gold-accent);
  color: #000;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  transition: all var(--transition-smooth);
  border: 1px solid var(--gold-accent);
  cursor: pointer;
}

.btn-primary:hover {
  background: #e2c04e;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px var(--gold-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: transparent;
  color: var(--text-primary);
  padding: 0.9rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  border: 1px solid var(--border-medium);
  transition: all var(--transition-smooth);
  cursor: pointer;
}

.btn-secondary:hover {
  border-color: var(--text-primary);
  background: var(--bg-surface);
  transform: translateY(-2px);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.metric-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

/* Masterpiece Frame (Hero Visual) */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.masterpiece-wrapper {
  position: relative;
  width: 100%;
  max-width: 520px;
}

.masterpiece-frame {
  position: relative;
  padding: 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-art);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
  cursor: pointer;
}

.masterpiece-frame:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.9), 0 0 40px var(--gold-glow);
}

.masterpiece-img-container {
  overflow: hidden;
  position: relative;
  background: #000;
  aspect-ratio: 1 / 1;
}

.masterpiece-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.masterpiece-frame:hover .masterpiece-img {
  transform: scale(1.05);
}

.masterpiece-tag {
  position: absolute;
  top: 30px;
  left: 30px;
  background: rgba(10, 11, 13, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-accent);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gold-accent);
  z-index: 3;
}

.masterpiece-caption {
  margin-top: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.masterpiece-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.masterpiece-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.btn-inspect-quick {
  background: transparent;
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  padding: 0.4rem 0.8rem;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-inspect-quick:hover {
  border-color: var(--gold-accent);
  color: var(--gold-accent);
}

/* ==========================================================================
   Collections Overview (Color Series Highlights)
   ========================================================================== */

.section-padding {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 4rem auto;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.series-showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.series-card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-smooth);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.series-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg);
}

.series-preview-box {
  position: relative;
  height: 280px;
  overflow: hidden;
  background: #000;
}

.series-preview-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.series-card:hover .series-preview-box img {
  transform: scale(1.08);
}

.series-overlay-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: #fff;
  font-weight: 500;
}

.series-content {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.series-name {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.series-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.2rem;
  flex-grow: 1;
}

.series-action {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gold-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.series-action span {
  transition: transform var(--transition-fast);
}

.series-card:hover .series-action span {
  transform: translateX(4px);
}

/* ==========================================================================
   Interactive Gallery Section
   ========================================================================== */

.gallery-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.gallery-controls-bar {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.8rem;
  margin-bottom: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 90px;
  z-index: 30;
  backdrop-filter: blur(16px);
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.filter-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-btn .count-badge {
  font-size: 0.72rem;
  padding: 0.15rem 0.45rem;
  background: var(--bg-surface-elevated);
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

.filter-btn:hover {
  border-color: var(--gold-accent);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--gold-accent);
  border-color: var(--gold-accent);
  color: #000;
  font-weight: 600;
}

.filter-btn.active .count-badge {
  background: rgba(0, 0, 0, 0.2);
  color: #000;
}

.gallery-secondary-tools {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.search-wrapper {
  position: relative;
  min-width: 240px;
}

.search-input {
  width: 100%;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.5rem 1rem 0.5rem 2.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--gold-accent);
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  font-size: 0.85rem;
}

.sort-select {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
}

.sort-select:focus {
  outline: none;
  border-color: var(--gold-accent);
}

/* Artwork Masonry / Grid */
.artwork-grid {
  columns: 4 300px;
  column-gap: 2rem;
  width: 100%;
}

.art-card {
  break-inside: avoid;
  margin-bottom: 2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-smooth);
  position: relative;
}

.art-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-art);
}

.art-card-inner {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: #0f1013;
}

.art-card-img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-slow);
}

.art-card:hover .art-card-img {
  transform: scale(1.04);
}

/* Hover Quick Actions */
.art-card-actions {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.2) 50%, rgba(0, 0, 0, 0.4) 100%);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.25rem;
  pointer-events: none;
}

.art-card:hover .art-card-actions {
  opacity: 1;
  pointer-events: auto;
}

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

.art-series-pill {
  font-size: 0.7rem;
  padding: 0.25rem 0.65rem;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  color: #fff;
  border-radius: var(--radius-full);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.art-btn-icon {
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.art-btn-icon:hover {
  background: var(--gold-accent);
  color: #000;
  border-color: var(--gold-accent);
}

.art-action-bottom {
  display: flex;
  gap: 0.6rem;
}

.btn-card-action {
  flex: 1;
  padding: 0.6rem 0.8rem;
  font-size: 0.78rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.btn-action-inspect {
  background: #ffffff;
  color: #000000;
}

.btn-action-inspect:hover {
  background: var(--gold-accent);
}

.btn-action-room {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-action-room:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Card Placard Info */
.art-card-info {
  padding: 1.1rem 1.3rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.art-card-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.25;
  margin-bottom: 0.25rem;
}

.art-card-dim {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.art-card-medium {
  font-size: 0.75rem;
  color: var(--gold-accent);
  white-space: nowrap;
}

/* No results state */
.no-results-box {
  text-align: center;
  padding: 4rem 1rem;
  grid-column: 1 / -1;
  display: none;
}

.no-results-box h3 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.no-results-box p {
  color: var(--text-secondary);
}

/* ==========================================================================
   Interactive "View in Room" Simulator (Wall Scale Experience)
   ========================================================================== */

.room-sim-section {
  padding: 110px 0;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.room-stage-container {
  background: #18191c;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.room-toolbar {
  padding: 1rem 1.8rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.room-selector-group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.toolbar-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  font-weight: 600;
}

.wall-swatches {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.wall-color-btn {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.wall-color-btn.active {
  transform: scale(1.2);
  border-color: var(--gold-accent);
}

.wall-white { background: #e8e7e3; }
.wall-taupe { background: #b0a89d; }
.wall-charcoal { background: #26282d; }
.wall-navy { background: #16202c; }

.room-select-piece {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  max-width: 320px;
  cursor: pointer;
}

/* Room Action Controls (Auto-Play & Fullscreen) */
.room-action-group {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-left: auto;
  flex-wrap: wrap;
}

.room-btn-luxury {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 0.5rem !important;
  background: rgba(255, 255, 255, 0.08) !important;
  color: var(--text-primary, #f5f5f7) !important;
  border: 1px solid rgba(212, 175, 55, 0.45) !important;
  padding: 0.55rem 1.25rem !important;
  border-radius: 9999px !important;
  font-family: inherit !important;
  font-size: 0.82rem !important;
  font-weight: 600 !important;
  letter-spacing: 0.04em !important;
  cursor: pointer !important;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3) !important;
  user-select: none !important;
  outline: none !important;
  -webkit-appearance: none !important;
  appearance: none !important;
}

.room-btn-luxury:hover {
  background: rgba(212, 175, 55, 0.18) !important;
  border-color: #d4af37 !important;
  color: #ffffff !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 6px 20px rgba(212, 175, 55, 0.35) !important;
}

.room-btn-luxury.is-active, .room-btn-luxury.active {
  background: linear-gradient(135deg, #e5c358 0%, #d4af37 100%) !important;
  color: #000000 !important;
  border-color: #d4af37 !important;
  box-shadow: 0 0 24px rgba(212, 175, 55, 0.6) !important;
}

.room-btn-luxury.is-active svg, .room-btn-luxury.active svg {
  fill: #000000 !important;
  stroke: #000000 !important;
}

.room-nav-btn {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  width: 40px !important;
  height: 40px !important;
  background: rgba(255, 255, 255, 0.08) !important;
  color: var(--text-primary, #f5f5f7) !important;
  border: 1px solid rgba(255, 255, 255, 0.2) !important;
  border-radius: 50% !important;
  cursor: pointer !important;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3) !important;
  user-select: none !important;
  outline: none !important;
  -webkit-appearance: none !important;
  appearance: none !important;
}

.room-nav-btn:hover {
  background: rgba(212, 175, 55, 0.25) !important;
  border-color: #d4af37 !important;
  color: #d4af37 !important;
  transform: translateY(-2px) scale(1.06) !important;
  box-shadow: 0 4px 14px rgba(212, 175, 55, 0.35) !important;
}

.room-btn-fullscreen {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(255, 255, 255, 0.05) 100%) !important;
  border-color: rgba(212, 175, 55, 0.6) !important;
}

.room-btn-fullscreen:hover {
  background: #d4af37 !important;
  color: #000000 !important;
  border-color: #d4af37 !important;
}

.room-btn-fullscreen:hover svg {
  stroke: #000000 !important;
}

.btn-room-tool {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.btn-room-tool:hover {
  border-color: var(--gold-accent);
  color: var(--gold-accent);
}

.btn-room-tool.active {
  background: var(--gold-accent);
  color: #000000;
  border-color: var(--gold-accent);
  font-weight: 600;
}

.btn-room-nav-icon {
  padding: 0.45rem 0.6rem;
}

.btn-room-expand {
  border-color: var(--border-medium);
}

.btn-room-expand:hover {
  background: var(--gold-accent);
  color: #000;
}

/* Floating Controls inside Room Viewport */
.room-fullscreen-close {
  display: none;
  position: absolute;
  top: 1.5rem;
  right: 1.8rem;
  background: rgba(10, 11, 13, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--gold-accent);
  color: var(--gold-accent);
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  z-index: 50;
  transition: all var(--transition-fast);
}

.room-fullscreen-close:hover {
  background: var(--gold-accent);
  color: #000;
}

.room-floating-nav {
  position: absolute;
  top: 45%;
  transform: translateY(-50%);
  background: rgba(15, 17, 20, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ffffff;
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  opacity: 0.6;
  transition: all var(--transition-fast);
}

.room-floating-nav:hover {
  opacity: 1;
  background: var(--gold-accent);
  color: #000000;
  border-color: var(--gold-accent);
  transform: translateY(-50%) scale(1.08);
}

.room-floating-prev { left: 1.8rem; }
.room-floating-next { right: 1.8rem; }

/* Auto-Play Pulse Indicator */
.room-autoplay-indicator {
  position: absolute;
  top: 1.5rem;
  left: 1.8rem;
  background: rgba(10, 11, 13, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-accent);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--gold-accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 15;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--gold-accent);
  border-radius: 50%;
  animation: pulse-glow 1.5s infinite;
}

@keyframes pulse-glow {
  0% { transform: scale(0.9); opacity: 0.7; box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.7); }
  70% { transform: scale(1.2); opacity: 1; box-shadow: 0 0 0 8px rgba(212, 175, 55, 0); }
  100% { transform: scale(0.9); opacity: 0.7; box-shadow: 0 0 0 0 rgba(212, 175, 55, 0); }
}

/* Crossfade Transition for Artwork Image */
.hanging-artwork img {
  transition: opacity 0.4s ease-in-out, transform 0.4s ease-out;
}

.hanging-artwork img.fading {
  opacity: 0.15;
  transform: scale(0.97);
}

/* ==========================================================================
   CINEMATIC AUTO-FADE (IDLE STATE WHEN PLAYING OR FULLSCREEN)
   ========================================================================== */

.room-stage-container {
  transition: cursor 0.3s ease;
}

.room-autoplay-progress {
  display: inline-block;
  width: 48px;
  height: 3px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  overflow: hidden;
  margin-left: 8px;
  vertical-align: middle;
}

.room-autoplay-fill {
  height: 100%;
  width: 0%;
  background: var(--gold-metallic);
  border-radius: 3px;
  transition: width 0.15s linear;
}

.room-toolbar,
.room-meta-banner,
.room-toolbar,
.room-meta-banner,
.room-fullscreen-close,
.room-autoplay-indicator {
  transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.45s ease !important;
}

/* ==========================================================================
   FULL PAGE ROOM SIMULATOR MODE
   ========================================================================== */

.room-stage-container.is-fullscreen {
  position: fixed !important;
  inset: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  max-width: 100vw !important;
  max-height: 100vh !important;
  z-index: 999999 !important;
  border-radius: 0 !important;
  border: none !important;
  margin: 0 !important;
  padding: 0 !important;
  overflow: hidden !important;
  background: #14161a !important;
  display: block !important;
}

.room-stage-container.is-fullscreen .room-canvas-viewport {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  min-height: 100vh !important;
  border-radius: 0 !important;
}

/* Wall area above the floor */
.room-stage-container.is-fullscreen .room-wall-area {
  position: absolute !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 140px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  z-index: 5 !important;
}

/* Architectural Floor in Fullscreen */
.room-stage-container.is-fullscreen .room-floor-surface {
  display: block !important;
  position: absolute !important;
  bottom: 0 !important;
  left: 0 !important;
  right: 0 !important;
  height: 140px !important;
  background: linear-gradient(180deg, #1b1612 0%, #0d0a08 100%) !important;
  border-top: 2px solid rgba(0, 0, 0, 0.8) !important;
  box-shadow: inset 0 20px 30px rgba(0, 0, 0, 0.6) !important;
  z-index: 4 !important;
}

/* Designer Furniture Bench in Fullscreen */
.room-stage-container.is-fullscreen .room-furniture-bench {
  display: block !important;
  position: absolute !important;
  bottom: 75px !important;
  left: 50% !important;
  transform: translateX(-50%) !important;
  width: min(520px, 75vw) !important;
  height: 48px !important;
  background: linear-gradient(180deg, #2b231d 0%, #171310 100%) !important;
  border-radius: 4px !important;
  box-shadow: 0 25px 45px rgba(0, 0, 0, 0.85) !important;
  z-index: 6 !important;
}

/* Remove 5'8 scale figure */
.room-stage-container .room-scale-reference,
.room-stage-container.is-fullscreen .room-scale-reference {
  display: none !important;
}

/* Scaled down artwork in Fullscreen */
.room-stage-container.is-fullscreen .hanging-artwork {
  max-height: 46vh !important;
  max-width: 62vw !important;
  box-shadow: 0 35px 75px rgba(0, 0, 0, 0.85), 0 10px 25px rgba(0, 0, 0, 0.5) !important;
  border: 8px solid #141416 !important;
}

.room-stage-container.is-fullscreen .hanging-artwork img {
  max-height: calc(46vh - 16px) !important;
  max-width: calc(62vw - 16px) !important;
  width: auto !important;
  height: auto !important;
  object-fit: contain !important;
}

/* Floating top toolbar overlay in fullscreen */
.room-stage-container.is-fullscreen .room-toolbar {
  position: absolute !important;
  top: 1.5rem !important;
  left: 50% !important;
  transform: translateX(-50%) !important;
  z-index: 100 !important;
  background: rgba(14, 16, 20, 0.9) !important;
  backdrop-filter: blur(24px) !important;
  -webkit-backdrop-filter: blur(24px) !important;
  border: 1px solid rgba(212, 175, 55, 0.3) !important;
  border-radius: 50px !important;
  padding: 0.6rem 1.6rem !important;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6) !important;
  width: auto !important;
  max-width: calc(100vw - 3rem) !important;
  display: flex !important;
  gap: 1.2rem !important;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Floating bottom metadata placard in fullscreen */
.room-stage-container.is-fullscreen .room-meta-banner {
  position: absolute !important;
  bottom: 2rem !important;
  left: 50% !important;
  transform: translateX(-50%) !important;
  z-index: 100 !important;
  background: rgba(14, 16, 20, 0.9) !important;
  backdrop-filter: blur(24px) !important;
  -webkit-backdrop-filter: blur(24px) !important;
  border: 1px solid rgba(212, 175, 55, 0.25) !important;
  border-radius: 50px !important;
  padding: 0.75rem 2.2rem !important;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6) !important;
  width: auto !important;
  max-width: min(720px, calc(100vw - 4rem)) !important;
  text-align: center !important;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.room-stage-container.is-fullscreen .room-fullscreen-close {
  display: inline-flex !important;
  position: absolute !important;
  top: 1.5rem !important;
  right: 2rem !important;
  z-index: 110 !important;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.room-stage-container.is-fullscreen .room-autoplay-indicator {
  position: absolute !important;
  top: 1.5rem !important;
  left: 2rem !important;
  z-index: 110 !important;
}

/* ==========================================================================
   DECISIVE IDLE DISAPPEAR RULES - MUST PREVAIL OVER ALL OTHER RULES
   ========================================================================== */
.room-stage-container.ui-idle,
.room-stage-container[data-idle="true"],
:fullscreen.ui-idle,
:-webkit-full-screen.ui-idle {
  cursor: none !important;
}

.room-stage-container.ui-idle *,
.room-stage-container[data-idle="true"] *,
:fullscreen.ui-idle *,
:-webkit-full-screen.ui-idle * {
  cursor: none !important;
}

.room-stage-container.ui-idle .room-toolbar,
.room-stage-container[data-idle="true"] .room-toolbar,
.room-stage-container.is-fullscreen.ui-idle .room-toolbar,
.room-stage-container.is-fullscreen[data-idle="true"] .room-toolbar,
:fullscreen.ui-idle .room-toolbar,
:-webkit-full-screen.ui-idle .room-toolbar,
.room-stage-container.ui-idle .room-meta-banner,
.room-stage-container[data-idle="true"] .room-meta-banner,
.room-stage-container.is-fullscreen.ui-idle .room-meta-banner,
.room-stage-container.is-fullscreen[data-idle="true"] .room-meta-banner,
:fullscreen.ui-idle .room-meta-banner,
:-webkit-full-screen.ui-idle .room-meta-banner,
.room-stage-container.ui-idle .room-fullscreen-close,
.room-stage-container[data-idle="true"] .room-fullscreen-close,
.room-stage-container.ui-idle .room-autoplay-indicator,
.room-stage-container[data-idle="true"] .room-autoplay-indicator {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

/* Virtual Architectural Room Wall Canvas */
.room-canvas-viewport {
  height: 620px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-smooth);
  background-color: #26282d;
  overflow: hidden;
}

/* Floor & Wall Line */
.room-wall-area {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Spotlight Effect on the Artwork */
.room-spotlight {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 70%;
  height: 90%;
  background: radial-gradient(ellipse at top, rgba(255, 255, 255, 0.18) 0%, rgba(255, 255, 255, 0.04) 50%, transparent 80%);
  pointer-events: none;
  z-index: 2;
}

/* The Hanging Artwork Element */
.hanging-artwork {
  position: relative;
  z-index: 5;
  box-shadow: 0 35px 70px rgba(0, 0, 0, 0.65), 0 10px 20px rgba(0, 0, 0, 0.4);
  border: 8px solid #141416;
  outline: 1px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition-smooth);
  cursor: pointer;
  max-height: 380px;
}

.hanging-artwork img {
  max-height: 360px;
  width: auto;
  height: auto;
  display: block;
  object-fit: contain;
}

/* Gallery Bench / Luxury Minimalist Furniture */
.room-furniture-bench {
  position: absolute;
  bottom: 85px;
  left: 50%;
  transform: translateX(-50%);
  width: 540px;
  height: 48px;
  background: linear-gradient(180deg, #2b231d 0%, #171310 100%);
  border-radius: 4px;
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.7);
  z-index: 6;
}

.bench-cushion {
  position: absolute;
  top: -12px;
  left: 10px;
  right: 10px;
  height: 18px;
  background: #3e322a;
  border-radius: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.bench-leg-left, .bench-leg-right {
  position: absolute;
  bottom: -40px;
  width: 8px;
  height: 40px;
  background: #111;
}

.bench-leg-left { left: 40px; }
.bench-leg-right { right: 40px; }

/* Architectural Hardwood / Concrete Floor */
.room-floor-surface {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 150px;
  background: linear-gradient(180deg, #1b1612 0%, #0d0a08 100%);
  border-top: 2px solid rgba(0, 0, 0, 0.8);
  box-shadow: inset 0 20px 30px rgba(0, 0, 0, 0.6);
  z-index: 4;
}

/* Room Simulation Metadata Bar */
.room-meta-banner {
  padding: 1.2rem 1.8rem;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.room-artwork-info h4 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.room-artwork-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Artist Biography & Studio Statement
   ========================================================================== */

.about-section {
  padding: 120px 0;
  position: relative;
}

.about-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 5rem;
  align-items: center;
}

.about-gallery-mosaic {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  position: relative;
}

.mosaic-item {
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
  position: relative;
}

.mosaic-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.mosaic-item:hover img {
  transform: scale(1.05);
}

.mosaic-1 {
  grid-column: 1 / 3;
  height: 340px;
}

.mosaic-2, .mosaic-3 {
  height: 240px;
}

.mosaic-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.75rem 1rem;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
  font-size: 0.75rem;
  color: #fff;
  letter-spacing: 0.05em;
}

.about-story {
  max-width: 620px;
}

.about-heading {
  font-size: clamp(2.2rem, 3.8vw, 3.2rem);
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.about-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.curatorial-quote-box {
  background: var(--bg-surface);
  border-left: 3px solid var(--gold-accent);
  padding: 1.5rem 1.8rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 2rem 0;
  font-style: italic;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--text-primary);
  line-height: 1.6;
}

.curatorial-attribution {
  font-family: var(--font-sans);
  font-style: normal;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gold-accent);
  margin-top: 0.8rem;
  display: block;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.pillar-card {
  padding: 1.2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

.pillar-card h5 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--gold-accent);
  margin-bottom: 0.4rem;
}

.pillar-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Exhibition Guestbook & Critical Acclaim
   ========================================================================== */

.guestbook-section {
  padding: 110px 0;
  background: var(--bg-secondary);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  position: relative;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
}

.testimonial-card::before {
  content: "“";
  font-family: var(--font-serif);
  font-size: 5rem;
  color: var(--border-subtle);
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  line-height: 1;
  pointer-events: none;
}

.testimonial-text {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: 1.8rem;
  font-weight: 400;
  position: relative;
  z-index: 2;
}

.testimonial-korean {
  font-size: 0.95rem;
  color: var(--text-secondary);
  border-left: 2px solid var(--gold-accent);
  padding-left: 0.8rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.2rem;
}

.author-avatar {
  width: 44px;
  height: 44px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--gold-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--gold-accent);
}

.author-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.author-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Inquiry & Acquisition Modal / Section
   ========================================================================== */

.inquiry-section {
  padding: 120px 0;
  background: radial-gradient(circle at 50% 30%, rgba(212, 175, 55, 0.06) 0%, transparent 60%), var(--bg-primary);
  text-align: center;
}

.inquiry-box {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 4rem 3rem;
  box-shadow: var(--shadow-lg);
}

.inquiry-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
  text-align: left;
}

.form-full {
  grid-column: 1 / -1;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.2rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--gold-accent);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.btn-submit-inquiry {
  grid-column: 1 / -1;
  padding: 1.1rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  background: var(--gold-accent);
  color: #000;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-smooth);
}

.btn-submit-inquiry:hover {
  background: #e2c04e;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px var(--gold-glow);
}

/* ==========================================================================
   Fullscreen Lightbox / Inspector Modal
   ========================================================================== */

.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(8, 9, 11, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 1000;
  display: none;
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.lightbox-overlay.active {
  display: flex;
  opacity: 1;
}

.lightbox-container {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: 1fr 420px;
  position: relative;
}

.lightbox-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  overflow: hidden;
}

.lightbox-image-wrapper {
  max-width: 90%;
  max-height: 90%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  box-shadow: var(--shadow-art);
  border: 4px solid #18191c;
  border-radius: var(--radius-sm);
  transition: transform var(--transition-smooth);
}

/* Nav arrows */
.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  width: 54px;
  height: 54px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 10;
}

.lightbox-nav-btn:hover {
  background: var(--gold-accent);
  color: #000;
  border-color: var(--gold-accent);
}

.lightbox-prev { left: 2rem; }
.lightbox-next { right: 2rem; }

.lightbox-close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 20;
}

.lightbox-close-btn:hover {
  background: #ff4757;
  color: #fff;
  border-color: #ff4757;
}

/* Lightbox Sidebar Placard */
.lightbox-sidebar {
  background: var(--bg-surface);
  border-left: 1px solid var(--border-subtle);
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
}

.sidebar-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 2rem;
  margin-bottom: 2rem;
}

.sidebar-catalog-id {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold-accent);
  margin-bottom: 0.5rem;
  display: block;
}

.sidebar-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.sidebar-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.artwork-spec-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 2.5rem;
}

.spec-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px dashed var(--border-subtle);
  padding-bottom: 0.6rem;
}

.spec-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.spec-val {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
  text-align: right;
}

.sidebar-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: #060708;
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 40px 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-col h5 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 1.2rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Back to Top Floating Button */
.back-to-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-fast);
  z-index: 50;
  box-shadow: var(--shadow-md);
}

.back-to-top-btn.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top-btn:hover {
  border-color: var(--gold-accent);
  color: var(--gold-accent);
  transform: translateY(-3px);
}

/* Toast Notification */
.toast-notice {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--gold-accent);
  color: #000;
  font-weight: 600;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  z-index: 2000;
  opacity: 0;
  transition: all var(--transition-smooth);
  pointer-events: none;
}

.toast-notice.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1200px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }
  .hero-content {
    margin: 0 auto;
  }
  .hero-statement {
    border-left: none;
    border-top: 2px solid var(--gold-accent);
    padding-left: 0;
    padding-top: 1rem;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-metrics {
    justify-content: center;
  }
  .masterpiece-wrapper {
    margin: 0 auto;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .lightbox-container {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
  }
  .lightbox-sidebar {
    border-left: none;
    border-top: 1px solid var(--border-subtle);
    max-height: 45vh;
  }
}

@media (max-width: 900px) {
  .nav-links, .header-actions .btn-inquire-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .artwork-grid {
    columns: 2 240px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .room-furniture-bench {
    width: 320px;
  }
}

@media (max-width: 600px) {
  .artwork-grid {
    columns: 1 100%;
  }
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  .inquiry-form {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}