/* ── Design Tokens ── */
:root {
  --bg:                 #10141d;
  --surface:            rgba(20, 26, 37, 0.93);
  --surface-hi:         rgba(255, 255, 255, 0.05);
  --border:             #20293a;
  --primary:            #00b4d8;
  --primary-dim:        rgba(0, 180, 216, 0.15);
  --primary-hi:         #0096c7;
  --text:               #e4e4e7;
  --text-2:             #8fa0b5;
  --text-3:             #3a4759;
  --bar-h:              58px;
  --mode-h:             62px;
  --r:                  10px;
  --r-sm:               7px;
  --panel-bg:           #151b26;
  --panel-border-color: #20293a;
}

/* ── Light Theme ── */
[data-theme="light"] {
  --bg:          #d8d8dc;
  --surface:     rgba(255,255,255,0.94);
  --surface-hi:  rgba(0,0,0,0.04);
  --border:      rgba(0,0,0,0.09);
  --text:        #1c1c24;
  --text-2:      #5a5a6e;
  --text-3:      #aaaabc;
  --primary:     #2563eb;
  --primary-dim: rgba(37,99,235,0.12);
  --primary-hi:  #1d4ed8;
  --panel-bg:           #e8e8ec;
  --panel-border-color: rgba(0,0,0,0.10);
}

/* ── Dark Theme (explicit — prevents @media light from bleeding) ── */
[data-theme="dark"] {
  --bg:                 #10141d;
  --surface:            rgba(20, 26, 37, 0.93);
  --surface-hi:         rgba(255, 255, 255, 0.05);
  --border:             #20293a;
  --primary:            #00b4d8;
  --primary-dim:        rgba(0, 180, 216, 0.15);
  --primary-hi:         #0096c7;
  --text:               #e4e4e7;
  --text-2:             #8fa0b5;
  --text-3:             #3a4759;
  --panel-bg:           #151b26;
  --panel-border-color: #20293a;
}

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

body {
  font-family: 'Noto Sans KR', 'Noto Sans JP', 'Noto Sans SC', 'Noto Sans TC', 'Noto Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  touch-action: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button { font-family: inherit; cursor: pointer; }
input[type="file"] { display: none; }

.hidden { display: none !important; }

/* ── Canvas ── */
#canvas-container {
  position: fixed;
  inset: 0;
  z-index: 1;
}

/* ── Top Bar ── */
#top-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10;
  background: var(--surface);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  overflow: visible;  /* must be visible so dropdown menus appear below */
  /* iOS PWA full-screen: avoid notch / status-bar overlap. Evaluates to 0
     on desktop and non-PWA contexts, so layout is unchanged elsewhere. */
  padding-top: env(safe-area-inset-top);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

#top-bar-main {
  display: flex;
  align-items: center;
  height: var(--bar-h);
  padding: 0 4px;
  gap: 1.5px;
  overflow: visible;
}

#file-name-text {
  display: none;
}

/* #top-bar-actions override is below with scrollable version */

/* ── Icon Buttons ── */
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  background: none;
  border: none;
  color: var(--text-2);
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn:hover  { background: var(--surface-hi); color: var(--text); }
.icon-btn:active { background: rgba(255,255,255,0.09); }
.icon-btn.active { background: var(--primary-dim); color: var(--primary); }

.icon-btn.sm { width: 32px; height: 32px; }
.icon-btn.sm svg { width: 15px; height: 15px; }

.icon-btn.primary {
  background: var(--primary);
  color: #fff;
  border-radius: var(--r-sm);
}
.icon-btn.primary:hover  { background: var(--primary-hi); color: #fff; }
.icon-btn.primary:active { background: #1d4ed8; }

/* ── Settings Panel ── */
#settings-panel {
  border-top: 1px solid var(--border);
  padding: 7px 12px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
#settings-panel.hidden { display: none; }

.setting-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.71rem;
  font-weight: 500;
  color: var(--text-2);
  cursor: pointer;
  user-select: none;
}
/* Text label before toggle */
.setting-item span { order: 1; }

/* ── Toggle switch ── */
.setting-item input[type="checkbox"] {
  order: 2;
  -webkit-appearance: none;
  appearance: none;
  width: 34px;
  height: 20px;
  border-radius: 10px;
  background: var(--text-3);
  position: relative;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.2s ease;
  outline: none;
  border: none;
}
.setting-item input[type="checkbox"]::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  top: 2px;
  left: 2px;
  transition: transform 0.18s ease;
  box-shadow: 0 1px 4px rgba(0,0,0,0.45);
}
.setting-item input[type="checkbox"]:checked {
  background: var(--primary);
}
.setting-item input[type="checkbox"]:checked::before {
  transform: translateX(14px);
}

.setting-item input[type="color"] {
  width: 22px; height: 22px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
}

#env-select {
  -webkit-appearance: none;
  appearance: none;
  background: var(--surface-hi);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.76rem;
  font-family: inherit;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  cursor: pointer;
  outline: none;
  order: 2;
}
#env-select option { background: #1a1a20; }

#env-row { display: none; }
#env-row.visible { display: flex; }

#model-info {
  margin-left: auto;
  font-size: 0.72rem;
  color: var(--text-3);
  letter-spacing: 0.01em;
}
#model-info.hidden { display: none; }

/* ── Empty State ── */
#empty-state {
  position: fixed;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  pointer-events: none;
}
#empty-state.hidden { display: none; }

#empty-icon {
  width: auto;
  height: 48px;
  color: var(--text-3);
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
}
#empty-icon img {
  height: 100%;
  width: auto;
  max-width: 280px;
}

/* ── Theme Visibility Helpers ── */
.light-only {
  display: block !important;
}
.dark-only {
  display: none !important;
}
body.dark-theme .light-only {
  display: none !important;
}
body.dark-theme .dark-only {
  display: block !important;
}

.empty-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-2);
}
.empty-sub {
  font-size: 0.82rem;
  color: var(--text-2);
  opacity: 0.85;
}
.empty-sub strong { color: var(--text); font-weight: 600; }

/* ── Bottom Mode Bar ── */
#mode-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 10;
  height: var(--mode-h);
  background: var(--surface);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: stretch;
  padding: 0 4px;
  /* iOS PWA full-screen: clear the home-indicator area. Adds extra space
     below the bar on iPhone X+; 0 on desktop and non-PWA contexts. */
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: calc(4px + env(safe-area-inset-left));
  padding-right: calc(4px + env(safe-area-inset-right));
}

.mode-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--text-2);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--r-sm);
  position: relative;
  transition: color 0.15s, background 0.15s;
  padding: 6px 0 8px;
}
.mode-btn svg { width: 22px; height: 22px; }
.mode-btn:active { background: var(--surface-hi); }
.mode-btn.active { color: var(--primary); }
.mode-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0; left: 20%; right: 20%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px 2px 0 0;
}

/* ── Layer Sidebar ── */
.sidebar {
  position: fixed;
  top: 0; right: 0;
  width: 260px;
  height: 100%;
  background: rgba(12, 12, 16, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-left: 1px solid var(--border);
  z-index: 20;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1);
}
.sidebar:not(.hidden) { transform: translateX(0); }

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--bar-h);
  padding: 0 12px 0 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-header h2 { font-size: 0.875rem; font-weight: 600; }

.text-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.66rem;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 5px;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.text-btn:hover { background: var(--surface-hi); color: var(--text); }

#layer-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px;
}

.layer-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;   /* needed for connector line pseudo-element */
  padding: 9px 10px;
  border-radius: var(--r-sm);
  transition: background 0.1s;
}
.layer-item:hover { background: var(--surface-hi); }

.layer-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  min-width: 0;
}
.layer-info span:last-child {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-color {
  width: 11px; height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.12);
}

.layer-toggle {
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.95rem;
  padding: 4px;
  border-radius: 5px;
  transition: opacity 0.15s;
  flex-shrink: 0;
}
.layer-toggle.off { opacity: 0.2; }

/* ── Properties Floating Panel ── */
.prop-float-panel {
  position: fixed;
  top: 72px;
  right: 12px;
  width: 290px;
  height: 430px;
  min-width: 240px;
  min-height: 150px;
  resize: both;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border);
  border-radius: var(--r);
  z-index: 15;
  box-shadow: 0 4px 24px rgba(0,0,0,0.45);
  touch-action: none;
}
.prop-float-panel.hidden { display: none !important; }

#prop-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
}

.prop-drag-handle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 8px 7px 10px;
  border-bottom: 1px solid var(--border);
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  border-radius: var(--r) var(--r) 0 0;
  background: rgba(255,255,255,0.03);
  flex-shrink: 0;
}
.prop-drag-handle:active { cursor: grabbing; }
.prop-drag-handle h3 { font-size: 0.76rem; font-weight: 600; color: var(--text); }

#prop-content {
  display: grid;
  grid-template-columns: 56px 1fr;
  row-gap: 5px;
  column-gap: 8px;
  font-size: 0.71rem;
  padding: 10px;
}
.prop-label { color: var(--text-2); font-weight: 500; }
.prop-value { color: var(--text); word-break: break-all; }

/* ── Measurement List Panel ── */
.measure-list-panel {
  position: fixed;
  top: 72px;
  right: 12px;
  width: 260px;
  min-width: 220px;
  min-height: 120px;
  resize: both;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--r);
  z-index: 14;
  padding: 8px 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.35);
}
.measure-list-panel.hidden { display: none !important; }
#measurement-list-items {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
  margin-bottom: 4px;
}
.measure-tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-2);
  font-size: 0.7rem;
  padding: 4px 0;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.15s;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.measure-tab-btn:hover {
  color: var(--text);
}
.measure-tab-btn.active {
  background: var(--surface) !important;
  color: var(--text) !important;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
  font-weight: 600;
}
.measure-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.measure-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 2px;
  border-bottom: 1px solid var(--border);
  font-size: 0.76rem;
}
.measure-row:last-child { border-bottom: none; }
.measure-idx {
  width: 16px;
  text-align: center;
  color: var(--text-2);
  font-size: 0.68rem;
  flex-shrink: 0;
}
.measure-val {
  flex: 1;
  color: #10b981;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.measure-del-btn {
  background: transparent;
  border: none;
  color: var(--text-3);
  padding: 2px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color 0.15s, background 0.15s;
}
.measure-del-btn:hover { color: #ef4444; background: rgba(239,68,68,0.12); }
.measure-list-hint {
  font-size: 0.65rem;
  color: var(--text-3);
  text-align: center;
  margin-top: 6px;
}

/* ── Loading Overlay ── */
#loading {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.25s;
}
#loading.hidden { opacity: 0; pointer-events: none; }

.spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(255,255,255,0.08);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  margin-bottom: 14px;
}
@keyframes spin { to { transform: rotate(360deg); } }

#loading-text {
  font-size: 0.82rem;
  color: var(--text-2);
  margin-bottom: 14px;
}

#progress-bar-container {
  width: 150px; height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: 2px;
  overflow: hidden;
}
#progress-bar {
  height: 100%;
  width: 0%;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.15s ease;
}

/* ── Material Editor (inside Properties panel) ── */
.mat-divider {
  grid-column: 1 / -1;
  border: none;
  border-top: 1px solid var(--border);
  margin: 2px 0;
}
.mat-section-title {
  grid-column: 1 / -1;
  font-size: 0.63rem;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-top: 2px;
}
.mat-editor {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mat-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
.mat-label {
  font-size: 0.64rem;
  font-weight: 500;
  color: var(--text-2);
  width: 56px;
  flex-shrink: 0;
}
.mat-val {
  font-size: 0.64rem;
  color: var(--text-2);
  width: 32px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.mat-row input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 3px;
  background: linear-gradient(to right,
    #3b82f6 0%,
    #3b82f6 var(--fill, 50%),
    rgba(255,255,255,0.14) var(--fill, 50%),
    rgba(255,255,255,0.14) 100%
  );
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  padding: 6px 0;
  box-sizing: content-box;
  background-clip: content-box;
}
/* properties panel range thumb inherits base */
.mat-row input[type="color"] {
  width: 26px; height: 22px;
  padding: 0 2px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
}
.mat-footer {
  grid-column: 1 / -1;
  display: flex;
  gap: 4px;
}
.mat-footer button:disabled {
  opacity: 0.35;
  cursor: default;
}

/* ── Color Grading Panel ── */
.cg-panel {
  position: fixed;
  bottom: 16px;
  right: 10px;
  width: 260px;
  min-width: 240px;
  min-height: 120px;
  resize: both;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border);
  border-radius: 12px;
  z-index: 20;
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
  transform: translateY(0);
  transition: opacity 0.2s, transform 0.2s;
}
.cg-panel.hidden { display: none !important; }

.cg-header {
  display: flex;
  align-items: center;
  padding: 5px 10px 5px 12px;
  border-bottom: 1px solid var(--border);
  gap: 6px;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
}
.cg-header:active {
  cursor: grabbing;
}
.cg-header h3 { font-size: 0.78rem; font-weight: 600; flex: 1; }

.cg-body {
  padding: 10px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

.cg-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.cg-label {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-2);
  width: 68px;
  flex-shrink: 0;
}
.cg-row input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 3px;
  background: linear-gradient(to right,
    #3b82f6 0%,
    #3b82f6 var(--fill, 50%),
    rgba(255,255,255,0.14) var(--fill, 50%),
    rgba(255,255,255,0.14) 100%
  );
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  padding: 7px 0;
  box-sizing: content-box;
  background-clip: content-box;
}
/* color grading panel range thumb inherits base */
.cg-val {
  font-size: 0.66rem;
  color: var(--primary);
  width: 26px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

/* ── Selection Dropdown ── */
.dropdown-wrap {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 4px;
  min-width: 168px;
  max-height: 80vh;
  overflow-y: auto;
  z-index: 50;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.dropdown-menu.hidden { display: none; }

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 6px 8px;
  background: none;
  border: none;
  color: var(--text-2);
  font-size: 0.68rem;
  font-weight: 500;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
  text-align: left;
}
.dropdown-item svg { width: 13px; height: 13px; flex-shrink: 0; }

/* ── Dropdown Specific Alignments for Mobile Safety ── */
#mode-dropdown,
#view-dropdown {
  left: 0;
  right: auto;
}

#zoom-dropdown,
#turntable-dropdown {
  left: 50%;
  transform: translateX(-50%);
  right: auto;
}

#select-dropdown,
#show-dropdown,
#tools-dropdown {
  right: 0;
  left: auto;
}
.dropdown-item:hover { background: var(--surface-hi); color: var(--text); }
.dropdown-item.active { color: var(--primary); background: var(--primary-dim); }

/* ── Turntable Dropdown ── */
.tt-menu {
  min-width: 190px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tt-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tt-label {
  font-size: 0.69rem;
  font-weight: 500;
  color: var(--text-2);
  width: 46px;
  flex-shrink: 0;
}

.tt-val {
  font-size: 0.67rem;
  color: var(--text-2);
  width: 26px;
  text-align: right;
  flex-shrink: 0;
}

.tt-toggle-btn {
  padding: 2px 10px; height: 22px;
  border-radius: 11px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.62rem; font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.tt-toggle-btn:hover { background: var(--surface-hi); color: var(--text); }
.tt-toggle-btn.active {
  background: rgba(59,130,246,0.18);
  color: var(--primary);
  border-color: rgba(59,130,246,0.45);
}

/* Range slider (base — used by turntable + any unstyled range) */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 4px;
  background: linear-gradient(to right,
    var(--primary) 0%,
    var(--primary) var(--fill, 50%),
    rgba(255,255,255,0.28) var(--fill, 50%),
    rgba(255,255,255,0.28) 100%
  );
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  padding: 7px 0;
  box-sizing: content-box;
  background-clip: content-box;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.35);
  cursor: pointer;
  transition: transform 0.1s, background-color 0.1s;
}
input[type="range"]:active::-webkit-slider-thumb {
  transform: scale(1.15);
  background: #f3f4f6;
}
input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.35);
  cursor: pointer;
}

/* Direction toggle buttons */
.tt-dir-group {
  display: flex;
  gap: 4px;
}

.tt-dir-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: none;
  border: 1px solid var(--border);
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.tt-dir-btn svg { width: 15px; height: 15px; }
.tt-dir-btn:hover { background: var(--surface-hi); color: var(--text); }
.tt-dir-btn.active { background: var(--primary-dim); border-color: var(--primary); color: var(--primary); }

/* ── Background Gradient Controls ── */
.bg-ctrl { display:flex; align-items:center; gap:6px; }
.color-swatch {
  width: 28px; height: 28px; border-radius: 50%;
  border: 2px solid var(--border);
  position: relative; overflow: hidden; cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  flex-shrink: 0;
}
.color-swatch:hover { transform: scale(1.12); box-shadow: 0 0 0 3px var(--primary-dim); }
.color-swatch input[type="color"] {
  position: absolute; inset: -4px;
  opacity: 0; cursor: pointer;
  width: calc(100% + 8px); height: calc(100% + 8px);
}
.grad-toggle-btn {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--surface-hi); border: 1px solid var(--border);
  color: var(--text-2); font-size: 0.9rem; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: color 0.15s, background 0.15s;
  flex-shrink: 0;
}
.grad-toggle-btn.active { background: var(--primary-dim); color: var(--primary); border-color: var(--primary); }

/* ── Dropdown Trigger Buttons (Modern icon + label style) ── */
.dropdown-trigger-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  width: 42px;
  height: 46px;
  border-radius: 10px;
  background: none;
  border: 1px solid transparent;
  color: var(--text-2);
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s;
  flex-shrink: 0;
  padding: 5px 2px 4px;
  cursor: pointer;
}
.dropdown-trigger-btn svg {
  width: 18px;
  height: 18px;
  pointer-events: none;
  flex-shrink: 0;
}
.dropdown-trigger-btn .btn-label {
  font-size: 0.45rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
  text-align: center;
  max-width: 38px;
  overflow: hidden;
  text-overflow: ellipsis;
  pointer-events: none;
  line-height: 1.15;
}
/* Hide any leftover old spans */
.dropdown-trigger-btn > span:not(.btn-label),
.dropdown-trigger-btn .arrow {
  display: none !important;
}
.dropdown-trigger-btn:hover {
  background: var(--surface-hi);
  border-color: var(--border);
  color: var(--text);
}
.dropdown-trigger-btn:active {
  transform: scale(0.94);
}
.dropdown-trigger-btn.active {
  background: var(--primary-dim);
  color: var(--primary);
  border-color: rgba(59,130,246,0.3);
}
/* Top-bar layout groups */
#top-bar-left {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

#top-bar-center {
  display: flex;
  align-items: center;
  gap: 1.5px;
  flex: 1;
  justify-content: center;
  overflow: visible;   /* must be visible so dropdown menus appear below */
}

/* ── No-model disabled state: center toolbar + layer button ── */
#top-bar-center.no-model,
#btn-layer-panel.no-model,
#bottom-view-tools-bar.no-model {
  pointer-events: none;
  opacity: 0.35;
}

#top-bar-right {
  display: flex;
  align-items: center;
  gap: 1.5px;
  flex-shrink: 0;
}

/* Top-bar actions — legacy fallback */
#top-bar-actions {
  display: contents;
}

/* ── Sliding Left Sidebar Panel (Premium Dark Blue) ── */
.left-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 290px;
  height: 100%;
  background: var(--panel-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid var(--panel-border-color);
  z-index: 25;
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: none;
}
.left-sidebar:not(.hidden) {
  transform: translateX(0);
  box-shadow: 10px 0 40px rgba(0, 0, 0, 0.45);
}

.left-sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--bar-h);
  padding: 0 16px;
  border-bottom: 1px solid var(--panel-border-color);
  flex-shrink: 0;
}
.left-sidebar-header h2 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}

.left-sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.left-sidebar-footer {
  padding: 14px 16px;
  flex-shrink: 0;
  border-top: 1px solid var(--panel-border-color);
  user-select: none;
}
.footer-logo {
  max-width: 126px;
  height: auto;
  opacity: 0.8;
  transition: opacity 0.15s ease;
}
.footer-logo:hover {
  opacity: 1;
}
.footer-logo.dark-only {
  display: none;
}
.footer-logo.light-only {
  display: block;
}
body.dark-theme .footer-logo.dark-only {
  display: block;
}
body.dark-theme .footer-logo.light-only {
  display: none;
}

.tab-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.tab-section.hidden {
  display: none;
}

/* ── Tab Bar (Bottom of Sidebar) ── */
.left-sidebar-tabs {
  display: flex;
  height: 52px;
  border-top: 1px solid var(--panel-border-color);
  background: rgba(4, 7, 16, 0.95);
  flex-shrink: 0;
}
.left-tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  background: none;
  border: none;
  color: var(--text-2);
  font-size: 0.63rem;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.left-tab-btn svg {
  width: 15px;
  height: 15px;
}
.left-tab-btn:hover {
  color: var(--text);
  background: var(--surface-hi);
}
.left-tab-btn.active {
  color: var(--primary);
  background: rgba(59, 130, 246, 0.06);
}

/* ── Right Sliding Panels (Layer / Settings) ── */
.right-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 290px;
  height: 100%;
  background: var(--panel-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-left: 1px solid var(--panel-border-color);
  z-index: 25;
  display: flex;
  flex-direction: column;
  transform: translateX(105%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: none;
}
.right-panel.panel-open {
  transform: translateX(0);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.45);
}

.right-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--bar-h);
  padding: 0 16px;
  border-bottom: 1px solid var(--panel-border-color);
  flex-shrink: 0;
}
.right-panel-header h2 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}
.app-version-tag {
  margin-left: auto;
  margin-right: 8px;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-2);
  opacity: 0.7;
  letter-spacing: 0.02em;
  font-family: 'Noto Sans', sans-serif;
  user-select: none;
  position: relative;
  top: 1px;
}

.right-panel-content {
  flex: 1;
  overflow-y: auto;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

/* ── File Tab Layout ── */
.file-actions-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.panel-action-btn {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  padding: 0 10px;
  height: 32px;
  background: var(--surface-hi);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  font-size: 0.68rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}
.panel-action-btn svg {
  width: 17px;
  height: 17px;
  color: var(--text-2);
  transition: color 0.15s;
}
.panel-action-btn:hover {
  background: var(--surface-hi);
  border-color: var(--border);
  transform: translateY(-1px);
}
.panel-action-btn:hover svg {
  color: var(--text);
}
.panel-action-btn:active {
  transform: translateY(1px);
}
.panel-action-btn.btn-primary {
  background: var(--primary) !important;
  color: #ffffff !important;
  border-color: var(--primary) !important;
}
.panel-action-btn.btn-primary svg {
  color: #ffffff !important;
}
.panel-action-btn.btn-primary:hover {
  background: var(--primary-hi) !important;
  color: #ffffff !important;
  border-color: var(--primary-hi) !important;
}
.panel-action-btn.btn-primary:hover svg {
  color: #ffffff !important;
}

.panel-sub-card {
  background: var(--surface-hi);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 5px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sub-card-title {
  font-size: 0.58rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  margin-bottom: 1px;
}
.info-content-text {
  font-size: 0.7rem;
  color: var(--text);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ── Layer Tab Layout ── */
#layer-list-panel {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.panel-select {
  width: 100%;
  background: var(--surface-hi);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.65rem;
  padding: 4px 7px;
  border-radius: var(--r-sm);
  outline: none;
  font-family: inherit;
  cursor: pointer;
}
.panel-select option {
  background: var(--panel-bg);
  color: var(--text);
}

/* ── Settings Group Card ── */
.setting-group-card {
  background: var(--surface-hi);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 5px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* ── Background Color Grid ── */
.bg-pickers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 4px;
}
.picker-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.67rem;
  color: var(--text-2);
}
.color-swatch-container {
  width: 100%;
  height: 26px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.15s;
}
.color-swatch-container:hover {
  border-color: rgba(255, 255, 255, 0.3);
}
.color-swatch-container input[type="color"] {
  position: absolute;
  inset: -6px;
  width: calc(100% + 12px);
  height: calc(100% + 12px);
  opacity: 0;
  cursor: pointer;
}

/* ── Compact circular color pickers for background ── */
.bg-color-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 8px;
}
.color-circle-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.color-circle {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.15);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  flex-shrink: 0;
}
.color-circle:hover {
  transform: scale(1.1);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.4);
}
.color-circle input[type="color"] {
  position: absolute;
  inset: -6px;
  width: calc(100% + 12px);
  height: calc(100% + 12px);
  opacity: 0;
  cursor: pointer;
}

/* ── Environment Preset Grid ── */
.env-preset-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-bottom: 10px;
}
.env-preset-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 4px 2px;
  border-radius: 6px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.55rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.env-preset-btn .env-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}
.env-preset-btn:hover { background: var(--surface-hi); color: var(--text); border-color: var(--border); }
.env-preset-btn.active { background: var(--primary-dim); color: var(--primary); border-color: rgba(59,130,246,0.4); }

#hdr-file-input { display: none; }
.hdr-upload-label {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px dashed var(--border);
  color: var(--text-2);
  font-size: 0.67rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  width: 100%;
  justify-content: center;
}
.hdr-upload-label:hover { background: var(--surface-hi); color: var(--text); }

/* ── Clipping Axis Buttons (X / Y / Z) ── */
.clip-axis-btns {
  display: flex;
  gap: 4px;
}
.clip-axis-btn {
  width: 28px; height: 22px;
  border-radius: 5px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.66rem;
  font-weight: 700;
  cursor: pointer;
  font-family: 'Noto Sans', monospace;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.clip-axis-btn:hover { background: var(--surface-hi); color: var(--text); }
.clip-axis-btn.active { background: rgba(239,68,68,0.18); color: #ef4444; border-color: rgba(239,68,68,0.5); }

.clip-flip-btn {
  padding: 2px 8px; height: 22px;
  border-radius: 5px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.62rem; font-weight: 600;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.clip-flip-btn:hover { background: var(--surface-hi); color: var(--text); }

.clip-reset-btn {
  width: 22px; height: 22px; flex-shrink: 0;
  border-radius: 5px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-3);
  font-size: 0.78rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.12s, color 0.12s;
  padding: 0;
}
.clip-reset-btn:hover { background: var(--surface-hi); color: var(--primary); }

/* ── Sky-Blue Visibility Toggles ── */
.toggles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 24px;
}
.setting-item-panel {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  min-height: 32px;   /* touch-friendly minimum */
  font-size: 0.63rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  user-select: none;
  padding: 1px 0;
}
.setting-item-panel input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  width: 28px;
  height: 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  position: relative;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.2s ease;
  outline: none;
  border: none;
}
.setting-item-panel input[type="checkbox"]::before {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  top: 2px;
  left: 2px;
  transition: transform 0.18s ease;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}
/* Sky blue toggle background when checked */
.setting-item-panel input[type="checkbox"]:checked {
  background: #0ea5e9 !important;
}
.setting-item-panel input[type="checkbox"]:checked::before {
  transform: translateX(12px);
}

/* ── Sliders ── */
.sliders-grid {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.slider-row {
  display: grid;
  grid-template-columns: 85px 1fr 45px;
  align-items: center;
  gap: 6px;
  width: 100%;
}
.slider-label {
  font-size: 0.60rem;
  color: var(--text-2);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
}
.slider-val {
  font-size: 0.60rem;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  text-align: right;
  width: 100%;
}
.slider-row .panel-select {
  grid-column: span 2;
  width: 100%;
}
.sliders-grid input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 3px;
  background: linear-gradient(to right,
    #3b82f6 0%,
    #3b82f6 var(--fill, 0%),
    rgba(255,255,255,0.14) var(--fill, 0%),
    rgba(255,255,255,0.14) 100%
  );
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  padding: 7px 0;
  box-sizing: border-box;
}

/* ── HTML Dynamic Layer List Items ── */
.layer-editable-name {
  background: none;
  border: none;
  color: var(--text);
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 500;
  outline: none;
  padding: 1px 3px;
  border-radius: 4px;
  width: 120px;
  transition: background 0.15s;
}
.layer-editable-name:focus {
  background: rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid var(--primary);
}

.layer-color-picker-trigger {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  cursor: pointer;
  position: relative;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.2);
  transition: transform 0.15s;
}
.layer-color-picker-trigger:hover {
  transform: scale(1.2);
}
.layer-color-picker-trigger input[type="color"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

/* ── Named Views list items ── */
.named-views-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: 6px 0;
}
.dropdown-subtitle {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px 2px;
}
.dropdown-empty-msg {
  font-size: 0.72rem;
  color: var(--text-3);
  text-align: center;
  padding: 8px 0;
  display: block;
}

/* ── Interactive watermark (Floating bottom right) ── */
#byrhinoview-watermark {
  position: fixed;
  bottom: 16px;
  right: 20px;
  font-size: 0.68rem; /* 조금 더 작고 컴팩트하게 조율 */
  font-weight: 500;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.55); /* 어두운 배경에서 한층 더 선명하고 밝은 기본 색상 */
  z-index: 5;
  pointer-events: auto; /* Clickable link */
  font-family: 'Noto Sans', sans-serif;
  user-select: none;
  transition: color 0.2s;
}
#byrhinoview-watermark a {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s;
}
#byrhinoview-watermark a:hover {
  text-decoration: underline;
}
#byrhinoview-watermark:hover {
  color: rgba(255, 255, 255, 0.95); /* 어두운 배경에서 호버 시 매우 밝고 선명한 흰색 */
}
:not([data-theme="dark"]) #byrhinoview-watermark:hover {
  color: rgba(0, 0, 0, 0.85) !important; /* 밝은 배경에서 호버 시 더욱 또렷한 검은색 */
}
body.light-theme #byrhinoview-watermark:hover {
  color: rgba(0, 0, 0, 0.85) !important; /* 밝은 배경에서 호버 시 더욱 또렷한 검은색 */
}

/* ── Light Mode Color Overrides ── */
/* ── Light Mode Color Overrides (Prefers & Class based) ── */
@media (prefers-color-scheme: light) {
  /* Only apply when user hasn't explicitly chosen dark */
  :root:not([data-theme="dark"]) {
    --bg: #e8eaf0;
    --surface: rgba(255, 255, 255, 0.94);
    --surface-hi: rgba(0, 0, 0, 0.04);
    --border: rgba(0, 0, 0, 0.08);
    --primary: #2563eb;
    --primary-dim: rgba(37, 99, 235, 0.10);
    --primary-hi: #1d4ed8;
    --text: #1f2937;
    --text-2: #6b7280;
    --text-3: #9ca3af;
    /* Rhino-style cool neutral gray panel */
    --panel-bg: #e8e8ec;
    --panel-border-color: rgba(0,0,0,0.10);
  }
  :not([data-theme="dark"]) .left-sidebar-header h2 { color: #111827 !important; }
  :not([data-theme="dark"]) .left-tab-btn:hover {
    color: #111827 !important;
    background: rgba(0, 0, 0, 0.02) !important;
  }
  :not([data-theme="dark"]) .panel-action-btn {
    background: rgba(0, 0, 0, 0.02) !important;
    border-color: rgba(0, 0, 0, 0.06) !important;
  }
  :not([data-theme="dark"]) .panel-action-btn.btn-primary {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #ffffff !important;
  }
  :not([data-theme="dark"]) .panel-action-btn:hover {
    background: rgba(0, 0, 0, 0.04) !important;
    border-color: rgba(0, 0, 0, 0.12) !important;
  }
  :not([data-theme="dark"]) .panel-action-btn.btn-primary:hover {
    background: var(--primary-hi) !important;
    border-color: var(--primary-hi) !important;
    color: #ffffff !important;
  }
  :not([data-theme="dark"]) .panel-action-btn:hover svg { color: #111827 !important; }
  :not([data-theme="dark"]) .panel-sub-card,
  :not([data-theme="dark"]) .setting-group-card {
    background: rgba(0, 0, 0, 0.015) !important;
    border-color: rgba(0, 0, 0, 0.04) !important;
  }
  :not([data-theme="dark"]) .panel-select {
    background: rgba(0, 0, 0, 0.02) !important;
    border-color: rgba(0, 0, 0, 0.06) !important;
  }
  :not([data-theme="dark"]) .panel-select option { background: #ffffff !important; }
  :not([data-theme="dark"]) .setting-item-panel input[type="checkbox"]:not(:checked) { background: rgba(0, 0, 0, 0.08) !important; }
  :not([data-theme="dark"]) .sliders-grid input[type="range"] { background: rgba(0, 0, 0, 0.08) !important; }
  :not([data-theme="dark"]) .layer-editable-name { color: #1f2937 !important; }
  :not([data-theme="dark"]) .layer-editable-name:focus { background: rgba(0, 0, 0, 0.04) !important; }
  :not([data-theme="dark"]) #byrhinoview-watermark { color: rgba(0, 0, 0, 0.45) !important; }
  :not([data-theme="dark"]) #empty-state { color: #6b7280 !important; }

  /* Popups premium white styling */
  :not([data-theme="dark"]) .cg-panel,
  :not([data-theme="dark"]) .dropdown-menu {
    box-shadow: 0 8px 30px rgba(0,0,0,0.08) !important;
  }
  :not([data-theme="dark"]) .prop-float-panel {
    box-shadow: 0 4px 20px rgba(0,0,0,0.06) !important;
  }
  :not([data-theme="dark"]) .modal-box {
    background: rgba(255, 255, 255, 0.95) !important;
    border-color: rgba(0, 0, 0, 0.08) !important;
    color: #1f2937 !important;
    box-shadow: 0 16px 40px rgba(0,0,0,0.12) !important;
  }
  :not([data-theme="dark"]) .modal-header {
    border-bottom-color: rgba(0, 0, 0, 0.06) !important;
  }
  :not([data-theme="dark"]) .modal-header span,
  :not([data-theme="dark"]) .modal-header h3 {
    color: #1f2937 !important;
  }
  :not([data-theme="dark"]) #input-named-view-name,
  :not([data-theme="dark"]) #capture-w,
  :not([data-theme="dark"]) #capture-h,
  :not([data-theme="dark"]) #capture-size-select {
    background: rgba(0, 0, 0, 0.03) !important;
    border-color: rgba(0, 0, 0, 0.1) !important;
    color: #1f2937 !important;
  }
  :not([data-theme="dark"]) .modal-row {
    color: #4b5563 !important;
  }
  :not([data-theme="dark"]) #loading {
    background: rgba(255, 255, 255, 0.75) !important;
  }
  :not([data-theme="dark"]) .spinner {
    border: 3px solid rgba(0, 0, 0, 0.06) !important;
    border-top-color: var(--primary) !important;
  }
  :not([data-theme="dark"]) #progress-bar-container {
    background: rgba(0, 0, 0, 0.06) !important;
  }
  input[type="range"] {
    background: rgba(0, 0, 0, 0.08) !important;
  }
}

/* Light Theme Class Overrides (Enforces Light mode on devices/webviews without prefers system sync) */
body.light-theme {
  --bg: #e8eaf0;
  --surface: rgba(255, 255, 255, 0.94);
  --surface-hi: rgba(0, 0, 0, 0.04);
  --border: rgba(0, 0, 0, 0.08);
  --primary: #2563eb;
  --primary-dim: rgba(37, 99, 235, 0.10);
  --primary-hi: #1d4ed8;
  --text: #1f2937;
  --text-2: #6b7280;
  --text-3: #9ca3af;
  --panel-bg: #e8e8ec;
  --panel-border-color: rgba(0,0,0,0.10);
}

body.dark-theme {
  /* Kept in sync with [data-theme="dark"] above so the body's --bg doesn't
     drift warm (#2a2b2f reads as brownish on AMOLED). */
  --bg:                 #10141d;
  --surface:            rgba(20, 26, 37, 0.93);
  --surface-hi:         rgba(255, 255, 255, 0.05);
  --border:             #20293a;
  --primary:            #00b4d8;
  --primary-dim:        rgba(0, 180, 216, 0.15);
  --primary-hi:         #0096c7;
  --text:               #e4e4e7;
  --text-2:             #8fa0b5;
  --text-3:             #3a4759;
  --panel-bg:           #151b26;
  --panel-border-color: #20293a;
}

body.light-theme .left-sidebar-header h2 { color: #111827 ; }
body.light-theme .left-tab-btn:hover {
  color: #111827 ;
  background: rgba(0, 0, 0, 0.02) ;
}
body.light-theme .panel-action-btn {
  background: rgba(0, 0, 0, 0.02) ;
  border-color: rgba(0, 0, 0, 0.06) ;
}
body.light-theme .panel-action-btn.btn-primary {
  background: var(--primary) !important;
  border-color: var(--primary) !important;
  color: #ffffff !important;
}
body.light-theme .panel-action-btn:hover {
  background: rgba(0, 0, 0, 0.04) ;
  border-color: rgba(0, 0, 0, 0.12) ;
}
body.light-theme .panel-action-btn.btn-primary:hover {
  background: var(--primary-hi) !important;
  border-color: var(--primary-hi) !important;
  color: #ffffff !important;
}
body.light-theme .panel-action-btn:hover svg { color: #111827 ; }
body.light-theme .panel-sub-card, 
body.light-theme .setting-group-card {
  background: rgba(0, 0, 0, 0.015) ;
  border-color: rgba(0, 0, 0, 0.04) ;
}
body.light-theme .panel-select {
  background: rgba(0, 0, 0, 0.02) ;
  border-color: rgba(0, 0, 0, 0.06) ;
}
body.light-theme .panel-select option { background: #ffffff ; }
body.light-theme .setting-item-panel input[type="checkbox"]:not(:checked) { background: rgba(0, 0, 0, 0.08) ; }
body.light-theme .sliders-grid input[type="range"] { background: rgba(0, 0, 0, 0.08) ; }
body.light-theme .layer-editable-name { color: #1f2937 ; }
body.light-theme .layer-editable-name:focus { background: rgba(0, 0, 0, 0.04) ; }
body.light-theme #byrhinoview-watermark { color: rgba(0, 0, 0, 0.45) ; }
body.light-theme #empty-state { color: #6b7280 ; }
body.light-theme #loading {
  background: rgba(255, 255, 255, 0.75) ;
}
body.light-theme .spinner {
  border: 3px solid rgba(0, 0, 0, 0.06) ;
  border-top-color: var(--primary) ;
}
body.light-theme #progress-bar-container {
  background: rgba(0, 0, 0, 0.06) ;
}

/* ── Dark Mode Fixes ── */

/* Issue 7: Slider bar more visible in dark mode */
[data-theme="dark"] input[type="range"],
body.dark-theme input[type="range"] {
  background: linear-gradient(to right,
    var(--primary) 0%,
    var(--primary) var(--fill, 50%),
    rgba(255,255,255,0.32) var(--fill, 50%),
    rgba(255,255,255,0.32) 100%
  ) !important;
  background-clip: content-box !important;
}

/* Issue 8: Native <select> option text visible in dark mode */
[data-theme="dark"] select,
body.dark-theme select {
  background: #27272b;
  color: #e4e4e7;
  border-color: rgba(255,255,255,0.1);
}
[data-theme="dark"] select option,
body.dark-theme select option {
  background: #27272b;
  color: #e4e4e7;
}
/* Also fix the custom panel-select in dark mode */
[data-theme="dark"] .panel-select,
body.dark-theme .panel-select {
  background: #27272b !important;
  color: #e4e4e7 !important;
}
[data-theme="dark"] .panel-select option,
body.dark-theme .panel-select option {
  background: #27272b !important;
  color: #e4e4e7 !important;
}

/* Issue 9: Top toolbar icons brighter in dark mode */
[data-theme="dark"] .dropdown-trigger-btn,
body.dark-theme .dropdown-trigger-btn {
  color: #a1a1aa;
}
[data-theme="dark"] .dropdown-trigger-btn:hover,
body.dark-theme .dropdown-trigger-btn:hover {
  color: #e4e4e7;
}
[data-theme="dark"] .icon-btn,
body.dark-theme .icon-btn {
  color: #a1a1aa;
}
[data-theme="dark"] .icon-btn:hover,
body.dark-theme .icon-btn:hover {
  color: #e4e4e7;
}

/* Measurement panel drag handle cursor */
.measure-list-panel .measure-drag-handle {
  cursor: grab;
  padding: 4px 8px 2px;
  user-select: none;
}
.measure-list-panel .measure-drag-handle:active {
  cursor: grabbing;
}

/* Popups premium white styling for light theme class */
body.light-theme .cg-panel, 
body.light-theme .dropdown-menu {
  background: rgba(255, 255, 255, 0.88) !important;
  border-color: rgba(0, 0, 0, 0.08) !important;
  box-shadow: 0 8px 30px rgba(0,0,0,0.08) ;
}
body.light-theme .prop-float-panel {
  background: rgba(255, 255, 255, 0.88) !important;
  border-color: rgba(0, 0, 0, 0.08) !important;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
body.light-theme .modal-box {
  background: rgba(255, 255, 255, 0.95) !important;
  border-color: rgba(0, 0, 0, 0.08) !important;
  color: #1f2937 !important;
  box-shadow: 0 16px 40px rgba(0,0,0,0.12) !important;
}
body.light-theme .modal-header {
  border-bottom-color: rgba(0, 0, 0, 0.06) !important;
}
body.light-theme .modal-header span,
body.light-theme .modal-header h3 {
  color: #1f2937 !important;
}
body.light-theme #input-named-view-name,
body.light-theme #capture-w,
body.light-theme #capture-h,
body.light-theme #capture-size-select {
  background: rgba(0, 0, 0, 0.03) !important;
  border-color: rgba(0, 0, 0, 0.1) !important;
  color: #1f2937 !important;
}
body.light-theme .modal-row {
  color: #4b5563 !important;
}
body.light-theme input[type="range"] {
  background: rgba(0, 0, 0, 0.08) ;
}

/* ── File Info Panel ── */
.file-info-row {
  padding: 3px 0;
  font-size: 0.78rem;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  word-break: break-word;
}
.file-info-row:last-child {
  border-bottom: none;
  color: var(--text-3);
  font-style: italic;
}
.info-content-text {
  font-size: 0.78rem;
  color: var(--text-2);
  line-height: 1.6;
}

/* ── Resizer ── */
.left-sidebar-resizer {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  width: 4px;
  cursor: col-resize;
  z-index: 30;
  background: transparent;
  transition: background 0.2s;
}
.left-sidebar-resizer:hover,
.left-sidebar-resizer.resizing {
  background: var(--primary);
  width: 6px;
}

/* ── Project Switch Button Active State ── */
.proj-btn.active {
  background: var(--primary) !important;
  color: #fff !important;
  border-color: var(--primary) !important;
}

/* ── Elegant Metadata Table ── */
.metadata-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.68rem;
  color: var(--text);
  margin-top: 4px;
}
.metadata-table tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.metadata-table tr:last-child {
  border-bottom: none;
}
.metadata-table td {
  padding: 6px 4px;
  vertical-align: top;
}
.metadata-table td.meta-label {
  color: var(--text-2);
  font-weight: 500;
  width: 40%;
}
.metadata-table td.meta-value {
  text-align: right;
  word-break: break-all;
}

body.light-theme .metadata-table tr {
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}
body.light-theme .metadata-table td.meta-label {
  color: var(--text-2);
}

/* ── Modal Dialog ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-overlay.hidden { display: none; }

.modal-box {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--r);
  min-width: 260px;
  max-width: 320px;
  box-shadow: 0 16px 60px rgba(0,0,0,0.7);
  color: var(--text);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 0.82rem; font-weight: 600; color: var(--text); }

.modal-body {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.74rem;
  color: var(--text-2);
}

/* ── Theme Selector ── */
.theme-selector {
  display: flex;
  gap: 4px;
}
.theme-btn {
  flex: 1;
  padding: 5px 4px;
  font-size: 0.68rem;
  font-weight: 600;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.theme-btn:hover { background: var(--surface-hi); color: var(--text); }
.theme-btn.active {
  background: var(--primary-dim);
  color: var(--primary);
  border-color: rgba(59,130,246,0.35);
}

/* Specific positioning for clipping settings panel (top right quadrant) */
#clipping-panel {
  top: 90px;
  right: 60px;
  bottom: auto;
}

/* Specific positioning for find object panel (top right quadrant) */
#find-panel {
  top: 72px;
  right: 12px;
  bottom: auto;
  width: 290px;
  min-width: 280px;
}

/* Custom Color Picker HSL Sliders */
.picker-range-slider {
  -webkit-appearance: none !important;
  appearance: none !important;
  height: 8px !important;
  border-radius: 4px !important;
  outline: none !important;
  padding: 0 !important;
  margin: 0 !important;
  box-sizing: border-box !important;
  background-clip: border-box !important;
  cursor: pointer !important;
}
.picker-range-slider::-webkit-slider-thumb {
  -webkit-appearance: none !important;
  width: 14px !important;
  height: 14px !important;
  border-radius: 50% !important;
  background: #ffffff !important;
  border: 1px solid rgba(0, 0, 0, 0.3) !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4) !important;
  cursor: pointer !important;
  transform: none !important;
  margin-top: 0 !important;
  transition: transform 0.1s !important;
}
.picker-range-slider:active::-webkit-slider-thumb {
  transform: scale(1.2) !important;
}
/* Coloris CAD Swatch Style Override */
.clr-field {
  width: 14px !important;
  height: 14px !important;
  border-radius: 3px !important;
  border: 1px solid rgba(255, 255, 255, 0.18) !important;
  flex-shrink: 0 !important;
  cursor: pointer !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  align-self: center !important; /* Force vertical centering inside flex row */
  position: relative !important;
  margin: 0 !important;
  padding: 0 !important;
  box-sizing: border-box !important;
}
.clr-field button {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  border-radius: 2px !important;
  border: none !important;
  box-shadow: none !important;
  cursor: pointer !important;
  padding: 0 !important;
  margin: 0 !important;
  /* Coloris ships a default `transform: translateY(-6px)` on the swatch button,
     which lifts the color swatch ~6px above its field box. With inset:0 we want
     it to fill the field exactly — kill the transform so it lines up vertically
     with the adjacent material sphere. */
  top: 0 !important;
  transform: none !important;
  pointer-events: auto !important;
}
.clr-field input {
  position: absolute !important;
  width: 0 !important;
  height: 0 !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* ── Layer Panel Rows (compact, Rhino-like flat list) ──────────────────────
 * Tight vertical rhythm so many layers fit on screen. No per-row card border /
 * background — just a hairline separator + hover highlight. The dynamic
 * padding-left (indent) is set inline in renderNode. */
#layer-list-panel .layer-item {
  display: flex;
  align-items: center;
  gap: 5px;
  padding-top: 2px;
  padding-bottom: 2px;
  padding-right: 6px;
  margin: 0;
  background: transparent;
  border: none;
  border-radius: 4px;
  box-shadow: inset 0 -1px 0 var(--border);
  min-height: 22px;
  box-sizing: border-box;
}
#layer-list-panel .layer-item:hover {
  background: var(--surface-hi);
}

/* ── Layer Panel Swatch Alignment ──────────────────────────────────────────
 * The layer panel renders a color swatch (Coloris-wrapped input) and a
 * material sphere swatch (button) side-by-side. Both need pixel-identical
 * vertical centering regardless of theme / font / DPR.
 * We use a flex container + identical box-model on both children so neither
 * inline-baseline nor display-mode differences can offset one. */
#layer-list-panel .layer-swatches {
  display: inline-flex !important;
  align-items: center !important;
  gap: 6px !important;
  flex-shrink: 0 !important;
  line-height: 0 !important;
  vertical-align: middle !important;
}
#layer-list-panel .layer-swatches > .clr-field,
#layer-list-panel .layer-swatches > .layer-material-swatch {
  width: 14px !important;
  height: 14px !important;
  box-sizing: border-box !important;
  margin: 0 !important;
  padding: 0 !important;
  flex-shrink: 0 !important;
  align-self: center !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  vertical-align: middle !important;
  line-height: 0 !important;
}
#layer-list-panel .layer-swatches > .layer-material-swatch {
  border-radius: 50% !important;
}

/* Properties Panel Specific Coloris Swatch Styles */
#object-properties .clr-field,
#layer-material-dialog .clr-field {
  width: 28px !important;
  height: 18px !important;
  border-radius: 4px !important;
  border: 1px solid rgba(255, 255, 255, 0.22) !important;
  margin: 0 !important;
  margin-left: 2px !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  vertical-align: middle !important; /* 안전장치: flex 미적용 환경도 커버 */
}
#object-properties .clr-field button,
#layer-material-dialog .clr-field button {
  border-radius: 3px !important;
  margin: 0 !important;       /* Coloris 기본 button의 margin/top 강제 제거 */
  top: auto !important;
  transform: none !important;
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
}

/* ── Layer Material Dialog ──────────────────────────────────────────────── */
#layer-material-dialog .lmd-card {
  position: fixed;
  /* Default center; JS may overwrite with explicit pixel coords on drag */
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--surface, #1e1f24);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.12));
  border-radius: 14px;
  padding: 16px 18px 14px;
  min-width: 280px;
  max-width: 340px;
  width: 92vw;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  gap: 12px;
  /* Re-enable interaction (outer overlay has pointer-events:none for click-through) */
  pointer-events: auto;
}
#layer-material-dialog .lmd-header {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: grab;
  user-select: none;
}
#layer-material-dialog .lmd-header:active { cursor: grabbing; }
/* Buttons inside the header keep their normal pointer (no grab) */
#layer-material-dialog .lmd-header button,
#layer-material-dialog .lmd-header input,
#layer-material-dialog .lmd-header .lmd-close { cursor: pointer; }
#layer-material-dialog .lmd-sphere {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}
#layer-material-dialog .lmd-title-wrap {
  flex: 1;
  min-width: 0;
}
#layer-material-dialog .lmd-title {
  font-weight: 600;
  font-size: 0.83rem;
  color: var(--text, #e0e0e0);
  letter-spacing: 0.01em;
}
#layer-material-dialog .lmd-subtitle {
  font-size: 0.68rem;
  color: var(--text-3, #888);
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#layer-material-dialog .lmd-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-3, #888);
  padding: 4px;
  border-radius: 6px;
  line-height: 1;
  flex-shrink: 0;
  transition: color 0.15s, background 0.15s;
}
#layer-material-dialog .lmd-close:hover {
  color: var(--text, #e0e0e0);
  background: rgba(255, 255, 255, 0.06);
}
#layer-material-dialog .lmd-body {
  padding-top: 2px;
}
#layer-material-dialog .mat-row {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 22px;
}
#layer-material-dialog .mat-label {
  width: 64px;
  flex-shrink: 0;
}
#layer-material-dialog .mat-row input[type="range"] {
  flex: 1;
  accent-color: var(--primary, #7c6aff);
  cursor: pointer;
}
#layer-material-dialog .lmd-color-cell {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}
#layer-material-dialog .lmd-color-value {
  font-size: 0.68rem;
  color: var(--text-3, #888);
  font-family: monospace;
}
#layer-material-dialog .lmd-actions {
  display: flex;
  gap: 8px;
  margin-top: 2px;
}
#layer-material-dialog .lmd-btn {
  flex: 1;
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 0.74rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
#layer-material-dialog .lmd-btn-secondary {
  border: 1px solid var(--border, rgba(255, 255, 255, 0.12));
  background: var(--surface-hi, rgba(255, 255, 255, 0.07));
  color: var(--text-2, #bbb);
}
#layer-material-dialog .lmd-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}
#layer-material-dialog .lmd-btn-primary {
  border: 1px solid var(--primary, #7c6aff);
  background: var(--primary, #7c6aff);
  color: #ffffff;
  font-weight: 600;
}
#layer-material-dialog .lmd-btn-primary:hover {
  filter: brightness(1.08);
}
#object-properties .mat-editor {
  gap: 6px !important;
  margin-top: 5px !important;
  margin-bottom: 5px !important;
}
#object-properties .mat-row {
  display: flex !important;        /* flex 컨테이너 */
  align-items: center !important;  /* 자식 전체를 수직 중앙 정렬 */
  min-height: 22px !important;
  gap: 6px !important;
  padding: 2px 0 !important;
}
#object-properties .mat-label {
  line-height: 1 !important;       /* 텍스트의 불필요한 행간 제거 */
  vertical-align: middle !important;
}

/* Force Coloris picker width so 6 swatches (20px each + 6px gap) fit perfectly in one row! */
.clr-picker {
  width: 212px !important;
  /* layer-material-dialog uses z-index 9999, so picker must sit above it */
  z-index: 10001 !important;
}

/* Coloris Swatches: center-aligned grid with uniform gap */
.clr-picker .clr-swatches div {
  justify-content: center !important;
  align-items: center !important;
  padding-left: 10px !important;
  padding-right: 10px !important;
  gap: 6px !important;
}

/* Custom Swatch Add Button: override ALL Coloris button defaults (Default Light Mode style) */
#clr-custom-add-btn {
  position: relative !important;
  width: 20px !important;
  height: 20px !important;
  margin: 0 !important; /* Rely on container gap */
  padding: 0 !important;
  border-radius: 50% !important;
  border: 1.5px dashed #4b5563 !important; /* Visible dark grey border in Light Mode */
  background: #f3f4f6 !important; /* Light grey background */
  text-indent: 0 !important;
  overflow: visible !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  cursor: pointer !important;
  box-shadow: none !important;
  flex-shrink: 0 !important;
  transition: background 0.15s, border-color 0.15s, transform 0.15s !important;
  box-sizing: border-box !important;
}

/* CRITICAL: Hide the ::after overlay that Coloris paints currentColor over the button */
#clr-custom-add-btn::after {
  display: none !important;
}

/* The span inside carries the + text, visible above any overlay (Default Light Mode style) */
#clr-custom-add-btn > span {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  width: 100% !important;
  height: 100% !important;
  color: #1f2937 !important; /* Very dark grey plus sign */
  font-size: 15px !important;
  font-weight: bold !important;
  line-height: 1 !important;
  pointer-events: none !important;
  text-indent: 0 !important;
}

#clr-custom-add-btn:hover {
  background: #e5e7eb !important;
  border-color: #111827 !important;
  transform: scale(1.08) !important;
}

/* Custom Swatch Add Button: Premium Dark Mode styling (inside .clr-dark) */
.clr-dark #clr-custom-add-btn {
  border: 1.5px dashed rgba(255, 255, 255, 0.45) !important;
  background: rgba(255, 255, 255, 0.08) !important;
}

.clr-dark #clr-custom-add-btn > span {
  color: rgba(255, 255, 255, 0.85) !important;
}

.clr-dark #clr-custom-add-btn:hover {
  background: rgba(255, 255, 255, 0.2) !important;
  border-color: rgba(255, 255, 255, 0.9) !important;
}

/* Keep normal swatches aligned with a consistent margin/gap */
.clr-picker .clr-swatches button {
  margin: 0 !important; /* Let the container gap handle it! */
}

/* ── Bottom Floating View Tools Bar ── */
.bottom-tools-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 12;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  padding: 4px 6px;
  border-radius: 10px;
  box-shadow: none;
  pointer-events: auto;
  transition: opacity 0.2s, transform 0.2s, background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body.dark-theme .bottom-tools-bar {
  background: rgba(0, 0, 0, 0.4);
}

.bottom-tool-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: transparent;
  border: none;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.15s ease;
}

.bottom-tool-btn svg {
  width: 16px;
  height: 16px;
}

.bottom-tool-btn:hover {
  background: var(--surface-hi);
  color: var(--text);
}

.bottom-tool-btn:active {
  background: var(--border);
}

.bottom-tool-btn.active {
  background: var(--primary-dim);
  color: var(--primary);
}

.bottom-tool-separator {
  width: 1px;
  height: 14px;
  background: var(--border);
  margin: 0 4px;
}

/* Coloris override inside Settings background color picker */
.color-circle .clr-field {
  width: 100% !important;
  height: 100% !important;
  border-radius: 50% !important;
  border: none !important;
  position: absolute !important;
  inset: 0 !important;
  background: transparent !important;
  background-image: none !important;
  box-shadow: none !important;
}

.color-circle .clr-field button {
  width: 100% !important;
  height: 100% !important;
  border-radius: 50% !important;
  border: none !important;
  background: transparent !important;
  background-color: transparent !important;
  background-image: none !important;
  box-shadow: none !important;
  outline: none !important;
  -webkit-appearance: none !important;
  appearance: none !important;
}

/* Force flat 2D color circles with absolutely no glossy/crescent shapes or bevels */
.color-circle * {
  box-shadow: none !important;
  background: transparent !important;
  background-image: none !important;
}

/* Hide any pseudo-element decorations, shadows, or gradients */
.color-circle .clr-field::after,
.color-circle .clr-field::before,
.color-circle .clr-field button::after,
.color-circle .clr-field button::before,
.color-circle .clr-field button:after,
.color-circle .clr-field button:before {
  display: none !important;
  content: none !important;
  box-shadow: none !important;
  background: transparent !important;
  background-image: none !important;
}

/* Clear contrast borders for color swatches in light mode */
body.light-theme .color-circle {
  border: 2px solid rgba(0, 0, 0, 0.12) !important;
}

/* ── Mobile Responsive Layout adjustments (Prevent watermark overlap) ── */
@media (max-width: 560px) {
  .bottom-tools-bar {
    bottom: 52px !important; /* Push up slightly to prevent intersection */
  }
  #byrhinoview-watermark {
    bottom: 18px !important;
    right: auto !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    letter-spacing: 0.05em;
    text-align: center;
  }
}

/* ── Dynamic Bottom Bar Contrast Adjustments ── */
.bottom-tools-bar.local-dark {
  background: rgba(18, 18, 22, 0.45) !important;
  border-color: rgba(255, 255, 255, 0.16) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25) !important;
}
.bottom-tools-bar.local-dark .bottom-tool-btn {
  color: rgba(255, 255, 255, 0.72) !important;
}
.bottom-tools-bar.local-dark .bottom-tool-btn:hover {
  background: rgba(255, 255, 255, 0.12) !important;
  color: #ffffff !important;
}
.bottom-tools-bar.local-dark .bottom-tool-btn.active {
  background: var(--primary) !important;
  color: #ffffff !important;
}

.bottom-tools-bar.local-light {
  background: rgba(255, 255, 255, 0.55) !important;
  border-color: rgba(0, 0, 0, 0.12) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08) !important;
}
.bottom-tools-bar.local-light .bottom-tool-btn {
  color: rgba(24, 24, 27, 0.75) !important;
}
.bottom-tools-bar.local-light .bottom-tool-btn:hover {
  background: rgba(24, 24, 27, 0.08) !important;
  color: #000000 !important;
}
.bottom-tools-bar.local-light .bottom-tool-btn.active {
  background: var(--primary) !important;
  color: #ffffff !important;
}

/* ── Bottom Bar Grouping and Popover Styling ── */
.bottom-tool-group {
  position: relative;
  display: inline-block;
}

.group-popup {
  position: absolute;
  bottom: calc(100% + 8px); /* Float 8px above the bottom bar */
  left: 50%;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 8px;
  padding: 4px;
  display: flex;
  flex-direction: column; /* Vertical alignment */
  gap: 4px;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(10px);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  /* Default = dark glassmorphic; the .local-* class on .bottom-tools-bar overrides. */
  background: rgba(18, 18, 22, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.group-popup.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

/* Popup follows the SAME local-dark/local-light decision as the parent bar,
   so the flyout and its host button always read the same contrast. */
.bottom-tools-bar.local-dark .group-popup {
  background: rgba(18, 18, 22, 0.85);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
.bottom-tools-bar.local-dark .group-popup .bottom-tool-btn {
  color: rgba(255, 255, 255, 0.72) !important;
}
.bottom-tools-bar.local-dark .group-popup .bottom-tool-btn:hover {
  background: rgba(255, 255, 255, 0.12) !important;
  color: #ffffff !important;
}

.bottom-tools-bar.local-light .group-popup {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}
.bottom-tools-bar.local-light .group-popup .bottom-tool-btn {
  color: rgba(24, 24, 27, 0.75) !important;
}
.bottom-tools-bar.local-light .group-popup .bottom-tool-btn:hover {
  background: rgba(24, 24, 27, 0.08) !important;
  color: #000000 !important;
}

/* Default (neither local-* class present yet) — keep dark icons for safety. */
.group-popup .bottom-tool-btn {
  color: rgba(255, 255, 255, 0.72) !important;
}
.group-popup .bottom-tool-btn:hover {
  background: rgba(255, 255, 255, 0.12) !important;
  color: #ffffff !important;
}

/* ── Cloud File Browser Modal (used by OneDrive picker) ───────────────── */
.cloud-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
}
.cloud-modal {
  width: min(560px, 92vw);
  max-height: 80vh;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.cloud-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.cloud-modal-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}
.cloud-modal-close {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  color: var(--text-2);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  border-radius: var(--r-sm);
}
.cloud-modal-close:hover { background: var(--surface-hi); color: var(--text); }
.cloud-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-2);
}
.cloud-crumb {
  background: transparent;
  border: none;
  color: var(--text-2);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  font-family: inherit;
}
.cloud-crumb:hover { color: var(--primary); background: var(--surface-hi); }
.cloud-crumb:last-child { color: var(--text); font-weight: 500; }
.cloud-crumb-sep { color: var(--text-3); font-size: 13px; }
.cloud-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0;
  min-height: 240px;
}
.cloud-list:focus { outline: none; }
.cloud-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 18px;
  cursor: pointer;
  color: var(--text);
  font-size: 13px;
  transition: background 0.12s;
}
.cloud-row:hover { background: var(--surface-hi); }
.cloud-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-2);
}
.cloud-row-folder .cloud-icon { color: var(--primary); }
.cloud-row-name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cloud-row-meta {
  font-size: 11px;
  color: var(--text-3);
  flex-shrink: 0;
}
.cloud-loading,
.cloud-empty {
  padding: 40px 18px;
  text-align: center;
  color: var(--text-2);
  font-size: 13px;
}
.cloud-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
}
.cloud-btn {
  border: 1px solid var(--border);
  background: var(--surface-hi);
  color: var(--text);
  padding: 7px 16px;
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
}
.cloud-btn:hover { background: var(--surface); }