:root {
  --bg: #120d09;
  --glass: rgba(28, 20, 14, 0.58);
  --glass-border: rgba(243, 214, 170, 0.14);
  --text: #f5ead8;
  --muted: #bfae96;
  --accent: #e2b77a;
  --accent-2: #c98a4b;
  --olive: #7d8a5c;
  --radius: 18px;
  --font-ui: 'Outfit', 'IBM Plex Sans Thai', system-ui, sans-serif;
  --font-display: 'Cormorant Garamond', 'IBM Plex Sans Thai', serif;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
}

#scene { position: fixed; inset: 0; touch-action: none; }
#scene canvas { display: block; touch-action: none; -webkit-user-select: none; user-select: none; }
.label-layer { position: absolute; inset: 0; pointer-events: none; touch-action: none; }

/* Desktop defaults for mobile drawer elements */
.btn-toggle-panel { display: none !important; }
.panel-backdrop { display: none !important; }
.drawer-header { display: none !important; }

/* ---------- Glass ---------- */
.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 235, 200, 0.06);
  animation: rise 0.9s cubic-bezier(.2, .8, .2, 1) both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

h2 {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 4px 0 10px;
}



/* ---------- Control panel ---------- */
.panel {
  position: fixed;
  top: 22px;
  right: 22px;
  width: 280px;
  max-height: calc(100vh - 44px);
  overflow-y: auto;
  padding: 18px;
  animation-delay: 0.1s;
}
.panel::-webkit-scrollbar { width: 4px; }
.panel::-webkit-scrollbar-thumb { background: rgba(243, 207, 152, 0.2); border-radius: 4px; }

.seg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 4px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.25);
  margin-bottom: 18px;
}
.seg button {
  font: 500 11.5px var(--font-ui);
  color: var(--muted);
  background: transparent;
  border: 0;
  padding: 8px 4px;
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.25s ease;
}
.seg button:hover { color: var(--text); }
.seg button.active {
  color: #22160c;
  background: linear-gradient(135deg, #f3cf98, #d39a5c);
  box-shadow: 0 4px 14px rgba(211, 154, 92, 0.35);
}

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  padding: 7px 0;
  cursor: pointer;
  user-select: none;
}
.toggle input { display: none; }
.toggle .track {
  position: relative;
  width: 34px;
  height: 19px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.12);
  transition: background 0.25s ease;
  flex-shrink: 0;
}
.toggle .track::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #f5ead8;
  transition: transform 0.3s cubic-bezier(.3, 1.4, .5, 1);
}
.toggle input:checked + .track { background: var(--accent-2); }
.toggle input:checked + .track::after { transform: translateX(15px); }

/* ---------- 3D Model Uploader & Gizmo Tools ---------- */
.btn-secondary {
  margin-top: 6px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: 500 13px var(--font-ui);
  color: #f5ead8;
  padding: 10px;
  border: 1px dashed rgba(243, 207, 152, 0.4);
  border-radius: 12px;
  background: rgba(243, 207, 152, 0.06);
  cursor: pointer;
  transition: all 0.25s ease;
}
.btn-secondary:hover {
  background: rgba(243, 207, 152, 0.15);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-1px);
}

.custom-tools {
  margin-top: 10px;
  padding: 12px;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 12px;
  border: 1px solid rgba(243, 207, 152, 0.15);
  animation: rise 0.4s ease both;
}
.tool-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}
.val-badge {
  font-weight: 600;
  color: var(--accent);
  background: rgba(226, 183, 122, 0.12);
  padding: 2px 8px;
  border-radius: 6px;
}
.seg-mini {
  grid-template-columns: repeat(2, 1fr);
  margin-bottom: 0;
  padding: 2px;
}
.seg-mini button {
  padding: 4px 10px;
  font-size: 11px;
}
.tool-slider {
  margin-bottom: 10px;
}
.tool-slider input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}
.preset-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 8px;
}
.btn-chip {
  font: 500 11px var(--font-ui);
  color: #f0d7b0;
  background: rgba(226, 183, 122, 0.1);
  border: 1px solid rgba(226, 183, 122, 0.25);
  padding: 6px 4px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-chip:hover {
  background: rgba(226, 183, 122, 0.25);
  color: #fff;
}
.btn-danger {
  width: 100%;
  font: 500 11.5px var(--font-ui);
  color: #ff9d9d;
  background: rgba(255, 60, 60, 0.1);
  border: 1px solid rgba(255, 60, 60, 0.25);
  padding: 6px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-danger:hover {
  background: rgba(255, 60, 60, 0.25);
  color: #fff;
}

/* Drag & Drop overlay */
.drop-overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(18, 13, 9, 0.85);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.drop-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.drop-box {
  width: 420px;
  max-width: 90vw;
  padding: 36px 24px;
  border: 2px dashed var(--accent);
  border-radius: 24px;
  background: rgba(36, 26, 18, 0.7);
  text-align: center;
  color: #f5ead8;
}
.drop-box svg {
  stroke: var(--accent);
  margin-bottom: 12px;
}
.drop-box p {
  font: 500 20px var(--font-display);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}
.drop-box span {
  font-size: 12.5px;
  color: var(--muted);
}

.btn-primary {
  margin-top: 14px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: 500 13.5px var(--font-ui);
  color: #22160c;
  padding: 11px;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  background: linear-gradient(135deg, #f3cf98, #c98a4b);
  box-shadow: 0 8px 22px rgba(201, 138, 75, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(201, 138, 75, 0.5); }
.btn-primary:active { transform: translateY(0); }



/* ---------- Views bar ---------- */
.views {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  display: flex;
  gap: 4px;
  padding: 6px;
  max-width: 95vw;
  overflow-x: auto;
  scrollbar-width: none;
  border-radius: 16px;
  animation: riseCenter 0.9s cubic-bezier(.2, .8, .2, 1) 0.3s both;
}
.views::-webkit-scrollbar { display: none; }
.views button {
  font: 500 12.5px var(--font-ui);
  color: var(--muted);
  background: transparent;
  border: 0;
  padding: 8px 12px;
  border-radius: 11px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.25s ease;
}
.views button:hover { color: var(--text); background: rgba(255, 235, 200, 0.06); }
.views button.active {
  color: #22160c;
  background: linear-gradient(135deg, #f3cf98, #d39a5c);
}

.hint {
  position: fixed;
  right: 22px;
  bottom: 30px;
  font-size: 12px;
  color: rgba(245, 234, 216, 0.5);
  letter-spacing: 0.04em;
}

/* ---------- 3D labels ---------- */
.dim-label {
  font: 600 12px var(--font-ui);
  color: #22160c;
  background: #f3c98b;
  padding: 3px 9px;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  white-space: nowrap;
}
.exhibit-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font: 600 11px var(--font-ui);
  color: #22160c;
  background: linear-gradient(135deg, #f3cf98, #d39a5c);
  padding: 3px 8px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.4);
  white-space: nowrap;
  pointer-events: none;
}
.exhibit-label.art-badge {
  background: linear-gradient(135deg, #f0e6d6, #d7c5ae);
  color: #2d2015;
}
.zone-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 500 12.5px var(--font-ui);
  color: var(--text);
  background: rgba(28, 20, 14, 0.72);
  border: 1px solid rgba(243, 214, 170, 0.25);
  padding: 5px 12px 5px 5px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
  white-space: nowrap;
}
.zone-label b {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 11.5px;
  color: #22160c;
  background: linear-gradient(135deg, #f3cf98, #c98a4b);
}

/* ---------- Loader ---------- */
#loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 50% 40%, #2b1d12, #0d0907 70%);
  transition: opacity 0.9s ease, visibility 0.9s ease;
}
#loader.done { opacity: 0; visibility: hidden; }
.loader-inner { text-align: center; }
.loader-mark {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(243, 207, 152, 0.5);
  font: 500 22px var(--font-display);
  color: #f3cf98;
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(243, 207, 152, 0.35); }
  50% { box-shadow: 0 0 0 16px rgba(243, 207, 152, 0); }
}
.loader-title { font: 500 28px var(--font-display); letter-spacing: 0.12em; }
.loader-sub { font-size: 13px; color: var(--muted); margin: 6px 0 18px; }
.loader-bar { width: 200px; height: 2px; margin: 0 auto; background: rgba(255, 255, 255, 0.1); overflow: hidden; border-radius: 2px; }
.loader-bar span {
  display: block;
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, transparent, #f3cf98, transparent);
  animation: slide 1.2s ease-in-out infinite;
}
@keyframes slide { from { transform: translateX(-100%); } to { transform: translateX(250%); } }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .hint { display: none; }
}
@media (max-width: 900px) {


  /* Floating mobile menu toggle button (Visible on mobile) */
  .btn-toggle-panel {
    display: inline-flex !important;
    align-items: center;
    gap: 7px;
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 50;
    padding: 9px 15px;
    border-radius: 999px;
    font: 600 12.5px var(--font-ui);
    color: #f3cf98;
    background: rgba(28, 20, 14, 0.90);
    border: 1px solid rgba(243, 214, 170, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 6px 22px rgba(0, 0, 0, 0.55);
    cursor: pointer;
    transition: all 0.25s ease;
    -webkit-tap-highlight-color: transparent;
  }
  .btn-toggle-panel:active {
    transform: scale(0.94);
  }
  .btn-toggle-panel.active {
    background: linear-gradient(135deg, #f3cf98, #d39a5c);
    color: #22160c;
    border-color: #f3cf98;
    box-shadow: 0 6px 24px rgba(243, 207, 152, 0.45);
  }



  /* Mobile Drawer Backdrop */
  .panel-backdrop {
    display: block !important;
    position: fixed;
    inset: 0;
    background: rgba(5, 3, 2, 0.65);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: 55;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.32s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .panel-backdrop.open {
    opacity: 1;
    pointer-events: auto;
  }

  /* Control Panel - Closed and completely hidden by default on mobile */
  #controlPanel {
    position: fixed !important;
    top: auto !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
    max-height: 84vh !important;
    border-radius: 22px 22px 0 0 !important;
    border-bottom: 0 !important;
    border-left: 0 !important;
    border-right: 0 !important;
    padding: 12px 18px calc(24px + env(safe-area-inset-bottom, 16px)) !important;
    z-index: 60 !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    animation: none !important;
    transition: transform 0.36s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease !important;
    box-shadow: 0 -16px 45px rgba(0, 0, 0, 0.8) !important;
  }

  /* When closed: completely invisible and untouchable */
  #controlPanel:not(.open) {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
    transform: translateY(105%) !important;
  }

  /* When open: visible bottom sheet */
  #controlPanel.open {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    transform: translateY(0) !important;
  }

  /* Drawer Header */
  .drawer-header {
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    position: relative;
    padding: 4px 0 12px;
    margin-bottom: 12px;
    border-bottom: 1px solid rgba(255, 235, 200, 0.12);
  }
  .drawer-pill {
    position: absolute;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 38px;
    height: 4px;
    border-radius: 999px;
    background: rgba(243, 207, 152, 0.4);
  }
  .drawer-title {
    font: 600 14px var(--font-ui);
    color: #f3cf98;
    letter-spacing: 0.03em;
  }
  .drawer-close {
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 50%;
    color: var(--text);
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
    -webkit-tap-highlight-color: transparent;
  }
  .drawer-close:active {
    transform: scale(0.9);
    background: rgba(255, 255, 255, 0.22);
  }

  /* Camera Views Bar */
  .views {
    left: 10px;
    right: 10px;
    bottom: calc(10px + env(safe-area-inset-bottom, 10px));
    transform: none;
    max-width: calc(100vw - 20px);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
    padding: 5px;
    gap: 5px;
    border-radius: 14px;
    justify-content: flex-start;
    animation: rise 0.8s both;
    z-index: 30;
  }
  .views button {
    padding: 7px 11px;
    font-size: 11.5px;
    flex-shrink: 0;
    scroll-snap-align: start;
    -webkit-tap-highlight-color: transparent;
  }

  /* 3D Labels Scaling */
  .dim-label {
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
  }
  .exhibit-label {
    font-size: 9.5px;
    padding: 2px 7px;
    gap: 3px;
  }
  .zone-label {
    font-size: 10.5px;
    padding: 3px 8px 3px 4px;
  }
  .zone-label b {
    width: 18px;
    height: 18px;
    font-size: 9.5px;
  }
}