/*
! tailwindcss v3.3.5 | MIT License | https://tailwindcss.com
*/

/*
1. Prevent padding and border from affecting element width. (https://github.com/mozdevs/cssremedy/issues/4)
2. Allow adding a border to an element by just adding a border-width. (https://github.com/tailwindcss/tailwindcss/pull/116)
*/

*,
::before,
::after {
  box-sizing: border-box;
  /* 1 */
  border-width: 0;
  /* 2 */
  border-style: solid;
  /* 2 */
  border-color: #e5e7eb;
  /* 2 */
}

::before,
::after {
  --tw-content: '';
}

/*
1. Use a consistent sensible line-height in all browsers.
2. Prevent adjustments of font size after orientation changes in iOS.
3. Use a more readable tab size.
4. Use the user's configured `sans` font-family by default.
5. Use the user's configured `sans` font-feature-settings by default.
6. Use the user's configured `sans` font-variation-settings by default.
*/

html {
  line-height: 1.5;
  /* 1 */
  -webkit-text-size-adjust: 100%;
  /* 2 */
  -moz-tab-size: 4;
  /* 3 */
  -o-tab-size: 4;
     tab-size: 4;
  /* 3 */
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  /* 4 */
  font-feature-settings: normal;
  /* 5 */
  font-variation-settings: normal;
  /* 6 */
}

/*
1. Remove the margin in all browsers.
2. Inherit line-height from `html` so users can set them as a class directly on the `html` element.
*/

body {
  margin: 0;
  /* 1 */
  line-height: inherit;
  /* 2 */
}

/*
1. Add the correct height in Firefox.
2. Correct the inheritance of border color in Firefox. (https://bugzilla.mozilla.org/show_bug.cgi?id=190655)
3. Ensure horizontal rules are visible by default.
*/

hr {
  height: 0;
  /* 1 */
  color: inherit;
  /* 2 */
  border-top-width: 1px;
  /* 3 */
}

/*
Add the correct text decoration in Chrome, Edge, and Safari.
*/

abbr:where([title]) {
  -webkit-text-decoration: underline dotted;
          text-decoration: underline dotted;
}

/*
Remove the default font size and weight for headings.
*/

h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: inherit;
  font-weight: inherit;
}

/*
Reset links to optimize for opt-in styling instead of opt-out.
*/

a {
  color: inherit;
  text-decoration: inherit;
}

/*
Add the correct font weight in Edge and Safari.
*/

b,
strong {
  font-weight: bolder;
}

/*
1. Use the user's configured `mono` font family by default.
2. Correct the odd `em` font sizing in all browsers.
*/

code,
kbd,
samp,
pre {
  font-family: "Courier New", monospace;
  /* 1 */
  font-size: 1em;
  /* 2 */
}

/*
Add the correct font size in all browsers.
*/

small {
  font-size: 80%;
}

/*
Prevent `sub` and `sup` elements from affecting the line height in all browsers.
*/

sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

/*
1. Remove text indentation from table contents in Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=999088, https://bugs.webkit.org/show_bug.cgi?id=201297)
2. Correct table border color inheritance in all Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=935729, https://bugs.webkit.org/show_bug.cgi?id=195016)
3. Remove gaps between table borders by default.
*/

table {
  text-indent: 0;
  /* 1 */
  border-color: inherit;
  /* 2 */
  border-collapse: collapse;
  /* 3 */
}

/*
1. Change the font styles in all browsers.
2. Remove the margin in Firefox and Safari.
3. Remove default padding in all browsers.
*/

button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  /* 1 */
  font-feature-settings: inherit;
  /* 1 */
  font-variation-settings: inherit;
  /* 1 */
  font-size: 100%;
  /* 1 */
  font-weight: inherit;
  /* 1 */
  line-height: inherit;
  /* 1 */
  color: inherit;
  /* 1 */
  margin: 0;
  /* 2 */
  padding: 0;
  /* 3 */
}

/*
Remove the inheritance of text transform in Edge and Firefox.
*/

button,
select {
  text-transform: none;
}

/*
1. Correct the inability to style clickable types in iOS and Safari.
2. Remove default button styles.
*/

button,
[type='button'],
[type='reset'],
[type='submit'] {
  -webkit-appearance: button;
  /* 1 */
  background-color: transparent;
  /* 2 */
  background-image: none;
  /* 2 */
}

/*
Use the modern Firefox focus style for all focusable elements.
*/

:-moz-focusring {
  outline: auto;
}

/*
Remove the additional `:invalid` styles in Firefox. (https://github.com/mozilla/gecko-dev/blob/2f9eacd9d3d995c937b4251a5557d95d494c9be1/layout/style/res/forms.css#L728-L737)
*/

:-moz-ui-invalid {
  box-shadow: none;
}

/*
Add the correct vertical alignment in Chrome and Firefox.
*/

progress {
  vertical-align: baseline;
}

/*
Correct the cursor style of increment and decrement buttons in Safari.
*/

::-webkit-inner-spin-button,
::-webkit-outer-spin-button {
  height: auto;
}

/*
1. Correct the odd appearance in Chrome and Safari.
2. Correct the outline style in Safari.
*/

[type='search'] {
  -webkit-appearance: textfield;
  /* 1 */
  outline-offset: -2px;
  /* 2 */
}

/*
Remove the inner padding in Chrome and Safari on macOS.
*/

::-webkit-search-decoration {
  -webkit-appearance: none;
}

/*
1. Correct the inability to style clickable types in iOS and Safari.
2. Change font properties to `inherit` in Safari.
*/

::-webkit-file-upload-button {
  -webkit-appearance: button;
  /* 1 */
  font: inherit;
  /* 2 */
}

/*
Add the correct display in Chrome and Safari.
*/

summary {
  display: list-item;
}

/*
Removes the default spacing and border for appropriate elements.
*/

blockquote,
dl,
dd,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
figure,
p,
pre {
  margin: 0;
}

fieldset {
  margin: 0;
  padding: 0;
}

legend {
  padding: 0;
}

ol,
ul,
menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

/*
Reset default styling for dialogs.
*/

dialog {
  padding: 0;
}

/*
Prevent resizing textareas horizontally by default.
*/

textarea {
  resize: vertical;
}

/*
1. Reset the default placeholder opacity in Firefox. (https://github.com/tailwindlabs/tailwindcss/issues/3300)
2. Set the default placeholder color to the user's configured gray 400 color.
*/

input::-moz-placeholder, textarea::-moz-placeholder {
  opacity: 1;
  /* 1 */
  color: #9ca3af;
  /* 2 */
}

input::placeholder,
textarea::placeholder {
  opacity: 1;
  /* 1 */
  color: #9ca3af;
  /* 2 */
}

/*
Set the default cursor for buttons.
*/

button,
[role="button"] {
  cursor: pointer;
}

/*
Make sure disabled buttons don't get the pointer cursor.
*/

:disabled {
  cursor: default;
}

/*
1. Make replaced elements `display: block` by default. (https://github.com/mozdevs/cssremedy/issues/14)
2. Add `vertical-align: middle` to align replaced elements more sensibly by default. (https://github.com/jensimmons/cssremedy/issues/14#issuecomment-634934210)
   This can trigger a poorly considered lint error in some tools but is included by design.
*/

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  /* 1 */
  vertical-align: middle;
  /* 2 */
}

/*
Constrain images and videos to the parent width and preserve their intrinsic aspect ratio. (https://github.com/mozdevs/cssremedy/issues/14)
*/

img,
video {
  max-width: 100%;
  height: auto;
}

/* Make elements with the HTML hidden attribute stay hidden by default */

[hidden] {
  display: none;
}

[type='text'],[type='email'],[type='url'],[type='password'],[type='number'],[type='date'],[type='datetime-local'],[type='month'],[type='search'],[type='tel'],[type='time'],[type='week'],[multiple],textarea,select {
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  background-color: #fff;
  border-color: #6b7280;
  border-width: 1px;
  border-radius: 0px;
  padding-top: 0.5rem;
  padding-right: 0.75rem;
  padding-bottom: 0.5rem;
  padding-left: 0.75rem;
  font-size: 1rem;
  line-height: 1.5rem;
  --tw-shadow: 0 0 #0000;
}

[type='text']:focus, [type='email']:focus, [type='url']:focus, [type='password']:focus, [type='number']:focus, [type='date']:focus, [type='datetime-local']:focus, [type='month']:focus, [type='search']:focus, [type='tel']:focus, [type='time']:focus, [type='week']:focus, [multiple]:focus, textarea:focus, select:focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
  --tw-ring-inset: var(--tw-empty,/*!*/ /*!*/);
  --tw-ring-offset-width: 0px;
  --tw-ring-offset-color: #fff;
  --tw-ring-color: #2563eb;
  --tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);
  --tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color);
  box-shadow: var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow);
  border-color: #2563eb;
}

input::-moz-placeholder, textarea::-moz-placeholder {
  color: #6b7280;
  opacity: 1;
}

input::placeholder,textarea::placeholder {
  color: #6b7280;
  opacity: 1;
}

::-webkit-datetime-edit-fields-wrapper {
  padding: 0;
}

::-webkit-date-and-time-value {
  min-height: 1.5em;
}

::-webkit-datetime-edit,::-webkit-datetime-edit-year-field,::-webkit-datetime-edit-month-field,::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute-field,::-webkit-datetime-edit-second-field,::-webkit-datetime-edit-millisecond-field,::-webkit-datetime-edit-meridiem-field {
  padding-top: 0;
  padding-bottom: 0;
}

select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
  -webkit-print-color-adjust: exact;
          print-color-adjust: exact;
}

[multiple] {
  background-image: initial;
  background-position: initial;
  background-repeat: unset;
  background-size: initial;
  padding-right: 0.75rem;
  -webkit-print-color-adjust: unset;
          print-color-adjust: unset;
}

[type='checkbox'],[type='radio'] {
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  padding: 0;
  -webkit-print-color-adjust: exact;
          print-color-adjust: exact;
  display: inline-block;
  vertical-align: middle;
  background-origin: border-box;
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
  flex-shrink: 0;
  height: 1rem;
  width: 1rem;
  color: #2563eb;
  background-color: #fff;
  border-color: #6b7280;
  border-width: 1px;
  --tw-shadow: 0 0 #0000;
}

[type='checkbox'] {
  border-radius: 0px;
}

[type='radio'] {
  border-radius: 100%;
}

[type='checkbox']:focus,[type='radio']:focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
  --tw-ring-inset: var(--tw-empty,/*!*/ /*!*/);
  --tw-ring-offset-width: 2px;
  --tw-ring-offset-color: #fff;
  --tw-ring-color: #2563eb;
  --tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);
  --tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(2px + var(--tw-ring-offset-width)) var(--tw-ring-color);
  box-shadow: var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow);
}

[type='checkbox']:checked,[type='radio']:checked {
  border-color: transparent;
  background-color: currentColor;
  background-size: 100% 100%;
  background-position: center;
  background-repeat: no-repeat;
}

[type='checkbox']:checked {
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3e%3cpath d='M12.207 4.793a1 1 0 010 1.414l-5 5a1 1 0 01-1.414 0l-2-2a1 1 0 011.414-1.414L6.5 9.086l4.293-4.293a1 1 0 011.414 0z'/%3e%3c/svg%3e");
}

[type='radio']:checked {
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3e%3ccircle cx='8' cy='8' r='3'/%3e%3c/svg%3e");
}

[type='checkbox']:checked:hover,[type='checkbox']:checked:focus,[type='radio']:checked:hover,[type='radio']:checked:focus {
  border-color: transparent;
  background-color: currentColor;
}

[type='checkbox']:indeterminate {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 16 16'%3e%3cpath stroke='white' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M4 8h8'/%3e%3c/svg%3e");
  border-color: transparent;
  background-color: currentColor;
  background-size: 100% 100%;
  background-position: center;
  background-repeat: no-repeat;
}

[type='checkbox']:indeterminate:hover,[type='checkbox']:indeterminate:focus {
  border-color: transparent;
  background-color: currentColor;
}

[type='file'] {
  background: unset;
  border-color: inherit;
  border-width: 0;
  border-radius: 0;
  padding: 0;
  font-size: unset;
  line-height: inherit;
}

[type='file']:focus {
  outline: 1px solid ButtonText;
  outline: 1px auto -webkit-focus-ring-color;
}

/* CRITICAL: Preserve the original flex layout! */

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

body {
  background-color: #0a0a0a;
  color: white;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Canvas sizing: CSS controls visual display, attributes control buffer resolution */

.main-canvas {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  width: 100%;
  height: 100%;
  z-index: 0;
  /* Prevent browser from intercepting touch gestures on the canvas */
  touch-action: none;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
       user-select: none;
  /* IMPORTANT: CSS width/height affect visual size only */
  /* canvas.width/height attributes (set by app.js) control rendering buffer size */
  /* These are two separate concepts in canvas elements */
  /* Positioned absolutely to prevent layout shifts during window resize */
  /* z-index: 0 ensures canvas stays behind all UI overlays */
}

/* Content container: allows events to pass through to canvas */

#content {
  pointer-events: none;
  /* This makes the container transparent to mouse/touch events */
  /* Child elements with pointer-events: auto will still be interactive */
}

/* Re-enable pointer events for interactive UI components */

#content button,
  #content input,
  #content select,
  #content textarea,
  #content a,
  #content .cad-panel,
  #content .cad-toolbar-btn,
  #content [data-onclick] {
  pointer-events: auto;
}

*, ::before, ::after {
  --tw-border-spacing-x: 0;
  --tw-border-spacing-y: 0;
  --tw-translate-x: 0;
  --tw-translate-y: 0;
  --tw-rotate: 0;
  --tw-skew-x: 0;
  --tw-skew-y: 0;
  --tw-scale-x: 1;
  --tw-scale-y: 1;
  --tw-pan-x:  ;
  --tw-pan-y:  ;
  --tw-pinch-zoom:  ;
  --tw-scroll-snap-strictness: proximity;
  --tw-gradient-from-position:  ;
  --tw-gradient-via-position:  ;
  --tw-gradient-to-position:  ;
  --tw-ordinal:  ;
  --tw-slashed-zero:  ;
  --tw-numeric-figure:  ;
  --tw-numeric-spacing:  ;
  --tw-numeric-fraction:  ;
  --tw-ring-inset:  ;
  --tw-ring-offset-width: 0px;
  --tw-ring-offset-color: #fff;
  --tw-ring-color: rgb(59 130 246 / 0.5);
  --tw-ring-offset-shadow: 0 0 #0000;
  --tw-ring-shadow: 0 0 #0000;
  --tw-shadow: 0 0 #0000;
  --tw-shadow-colored: 0 0 #0000;
  --tw-blur:  ;
  --tw-brightness:  ;
  --tw-contrast:  ;
  --tw-grayscale:  ;
  --tw-hue-rotate:  ;
  --tw-invert:  ;
  --tw-saturate:  ;
  --tw-sepia:  ;
  --tw-drop-shadow:  ;
  --tw-backdrop-blur:  ;
  --tw-backdrop-brightness:  ;
  --tw-backdrop-contrast:  ;
  --tw-backdrop-grayscale:  ;
  --tw-backdrop-hue-rotate:  ;
  --tw-backdrop-invert:  ;
  --tw-backdrop-opacity:  ;
  --tw-backdrop-saturate:  ;
  --tw-backdrop-sepia:  ;
}

::backdrop {
  --tw-border-spacing-x: 0;
  --tw-border-spacing-y: 0;
  --tw-translate-x: 0;
  --tw-translate-y: 0;
  --tw-rotate: 0;
  --tw-skew-x: 0;
  --tw-skew-y: 0;
  --tw-scale-x: 1;
  --tw-scale-y: 1;
  --tw-pan-x:  ;
  --tw-pan-y:  ;
  --tw-pinch-zoom:  ;
  --tw-scroll-snap-strictness: proximity;
  --tw-gradient-from-position:  ;
  --tw-gradient-via-position:  ;
  --tw-gradient-to-position:  ;
  --tw-ordinal:  ;
  --tw-slashed-zero:  ;
  --tw-numeric-figure:  ;
  --tw-numeric-spacing:  ;
  --tw-numeric-fraction:  ;
  --tw-ring-inset:  ;
  --tw-ring-offset-width: 0px;
  --tw-ring-offset-color: #fff;
  --tw-ring-color: rgb(59 130 246 / 0.5);
  --tw-ring-offset-shadow: 0 0 #0000;
  --tw-ring-shadow: 0 0 #0000;
  --tw-shadow: 0 0 #0000;
  --tw-shadow-colored: 0 0 #0000;
  --tw-blur:  ;
  --tw-brightness:  ;
  --tw-contrast:  ;
  --tw-grayscale:  ;
  --tw-hue-rotate:  ;
  --tw-invert:  ;
  --tw-saturate:  ;
  --tw-sepia:  ;
  --tw-drop-shadow:  ;
  --tw-backdrop-blur:  ;
  --tw-backdrop-brightness:  ;
  --tw-backdrop-contrast:  ;
  --tw-backdrop-grayscale:  ;
  --tw-backdrop-hue-rotate:  ;
  --tw-backdrop-invert:  ;
  --tw-backdrop-opacity:  ;
  --tw-backdrop-saturate:  ;
  --tw-backdrop-sepia:  ;
}

.\!container {
  width: 100% !important;
}

.container {
  width: 100%;
}

@media (min-width: 640px) {
  .\!container {
    max-width: 640px !important;
  }

  .container {
    max-width: 640px;
  }
}

@media (min-width: 768px) {
  .\!container {
    max-width: 768px !important;
  }

  .container {
    max-width: 768px;
  }
}

@media (min-width: 1024px) {
  .\!container {
    max-width: 1024px !important;
  }

  .container {
    max-width: 1024px;
  }
}

@media (min-width: 1280px) {
  .\!container {
    max-width: 1280px !important;
  }

  .container {
    max-width: 1280px;
  }
}

@media (min-width: 1536px) {
  .\!container {
    max-width: 1536px !important;
  }

  .container {
    max-width: 1536px;
  }
}

/* CAD-specific component patterns */

.cad-toolbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border-radius: 0.25rem;
  transition: all 200ms;
  background-color: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
}

.cad-toolbar-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.cad-toolbar-btn:active {
  transform: translateY(0);
}

/* ===== Ribbon Toolbar ===== */

.ribbon {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1001;
  /* above sidebars (998) */
  background: rgba(0, 0, 0, 0.85);
  -webkit-backdrop-filter: blur(12px);
          backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  pointer-events: auto;
  transition: max-height 0.2s ease;
}

.ribbon--collapsed .ribbon__panel,
  .ribbon--collapsed .ribbon__panel-wrapper {
  max-height: 0;
  overflow: hidden;
  padding: 0;
  opacity: 0;
  transition: all 0.2s ease;
}

.ribbon__tab-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 28px;
  padding: 0 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.ribbon__tab-strip-left {
  display: flex;
  align-items: center;
  gap: 0;
}

.ribbon__tab {
  padding: 4px 16px;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: rgba(255, 255, 255, 0.5);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
}

.ribbon__tab:hover {
  color: rgba(255, 255, 255, 0.8);
}

.ribbon__tab--active {
  color: #89b4fa;
  border-bottom-color: #89b4fa;
}

/* Sidebars start below ribbon */

.sidebar-below-ribbon {
  top: 114px;
  /* ~100px ribbon + 14px gap */
  transition: top 0.2s ease;
}

.ribbon--collapsed ~ .sidebar-below-ribbon {
  top: 43px;
  /* 28px tab strip + 1px border + 14px gap */
}

.ribbon__doc-name {
  flex: 1;
  text-align: center;
  font-size: 12px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.5);
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ribbon__collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  border-radius: 4px;
}

.ribbon__collapse-btn:hover {
  color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.1);
}

.ribbon__panel {
  display: flex;
  align-items: stretch;
  gap: 4px;
  padding: 6px 12px;
  min-height: 72px;
  transition: all 0.2s ease;
  opacity: 1;
}

.ribbon__section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
}

.ribbon__section-content {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.ribbon__section-label {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.35);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-align: center;
  padding-top: 2px;
  white-space: nowrap;
}

.ribbon__divider {
  width: 1px;
  align-self: stretch;
  margin: 4px 4px;
  background: rgba(255, 255, 255, 0.12);
}

.ribbon__tool-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 56px;
  min-height: 52px;
  padding: 4px 2px;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  transition: all 0.15s;
  gap: 2px;
}

.ribbon__tool-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

.ribbon__tool-btn--active {
  background: rgba(33, 150, 243, 0.25);
  border-color: rgba(33, 150, 243, 0.6);
  color: #89b4fa;
}

.ribbon__tool-btn--active:hover {
  background: rgba(33, 150, 243, 0.35);
}

/* Split button: main button + dropdown chevron */

.ribbon__split-btn-container {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.ribbon__split-btn-main {
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
  padding-bottom: 0;
  min-height: 44px;
}

.ribbon__split-btn-chevron {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 14px;
  background: none;
  border: 1px solid transparent;
  border-top: none;
  border-radius: 0 0 6px 6px;
  color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all 0.15s;
}

.ribbon__split-btn-chevron:hover {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.8);
}

.ribbon__poly-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 2px;
  display: none;
  flex-direction: column;
  gap: 2px;
  background: rgba(0, 0, 0, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 4px;
  min-width: 140px;
  z-index: 1002;
}

.ribbon__poly-dropdown.open {
  display: flex;
}

.ribbon__poly-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 4px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s;
}

.ribbon__poly-option:hover {
  background: rgba(255, 255, 255, 0.1);
}

.ribbon__poly-option.active {
  background: rgba(33, 150, 243, 0.25);
  color: #89b4fa;
}

/* Construction plane dropdown — wider to fit input fields */

.ribbon__plane-dropdown {
  min-width: 180px;
}

.ribbon__plane-field {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
}

.ribbon__plane-label {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.6);
  min-width: 38px;
}

.ribbon__plane-input {
  width: 64px;
  padding: 3px 6px;
  font-size: 11px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  color: rgba(255, 255, 255, 0.9);
  outline: none;
}

.ribbon__plane-input:focus {
  border-color: rgba(33, 150, 243, 0.5);
  background: rgba(255, 255, 255, 0.12);
}

.ribbon__plane-separator {
  border: none;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin: 2px 8px;
}

.ribbon__tool-icon {
  width: 20px;
  height: 20px;
}

.ribbon__tool-label {
  font-size: 10px;
  line-height: 1.2;
  text-align: center;
  white-space: pre-line;
  color: inherit;
  opacity: 0.8;
}

.pointer-events-none {
  pointer-events: none;
}

.pointer-events-auto {
  pointer-events: auto;
}

.visible {
  visibility: visible;
}

.collapse {
  visibility: collapse;
}

.static {
  position: static;
}

.fixed {
  position: fixed;
}

.absolute {
  position: absolute;
}

.relative {
  position: relative;
}

.inset-0 {
  inset: 0px;
}

.-left-2 {
  left: -0.5rem;
}

.-left-2\.5 {
  left: -0.625rem;
}

.-right-2 {
  right: -0.5rem;
}

.-right-2\.5 {
  right: -0.625rem;
}

.bottom-0 {
  bottom: 0px;
}

.bottom-4 {
  bottom: 1rem;
}

.left-0 {
  left: 0px;
}

.left-1\/2 {
  left: 50%;
}

.left-2 {
  left: 0.5rem;
}

.left-2\.5 {
  left: 0.625rem;
}

.right-0 {
  right: 0px;
}

.top-0 {
  top: 0px;
}

.top-1\/2 {
  top: 50%;
}

.top-2 {
  top: 0.5rem;
}

.top-2\.5 {
  top: 0.625rem;
}

.z-50 {
  z-index: 50;
}

.z-\[1000\] {
  z-index: 1000;
}

.z-\[1001\] {
  z-index: 1001;
}

.z-\[2000\] {
  z-index: 2000;
}

.z-sidebar {
  z-index: 998;
}

.mb-1 {
  margin-bottom: 0.25rem;
}

.mb-1\.5 {
  margin-bottom: 0.375rem;
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.ml-2 {
  margin-left: 0.5rem;
}

.ml-5 {
  margin-left: 1.25rem;
}

.mt-0 {
  margin-top: 0px;
}

.mt-0\.5 {
  margin-top: 0.125rem;
}

.mt-1 {
  margin-top: 0.25rem;
}

.mt-1\.5 {
  margin-top: 0.375rem;
}

.mt-2 {
  margin-top: 0.5rem;
}

.mt-3 {
  margin-top: 0.75rem;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

.inline {
  display: inline;
}

.flex {
  display: flex;
}

.table {
  display: table;
}

.\!grid {
  display: grid !important;
}

.grid {
  display: grid;
}

.contents {
  display: contents;
}

.hidden {
  display: none;
}

.h-10 {
  height: 2.5rem;
}

.h-16 {
  height: 4rem;
}

.h-3 {
  height: 0.75rem;
}

.h-4 {
  height: 1rem;
}

.h-full {
  height: 100%;
}

.max-h-\[70vh\] {
  max-height: 70vh;
}

.w-2 {
  width: 0.5rem;
}

.w-2\.5 {
  width: 0.625rem;
}

.w-3 {
  width: 0.75rem;
}

.w-4 {
  width: 1rem;
}

.w-64 {
  width: 16rem;
}

.w-80 {
  width: 20rem;
}

.w-\[500px\] {
  width: 500px;
}

.w-\[80px\] {
  width: 80px;
}

.w-full {
  width: 100%;
}

.min-w-0 {
  min-width: 0px;
}

.min-w-\[250px\] {
  min-width: 250px;
}

.flex-1 {
  flex: 1 1 0%;
}

.shrink-0 {
  flex-shrink: 0;
}

.grow {
  flex-grow: 1;
}

.-translate-x-1\/2 {
  --tw-translate-x: -50%;
  transform: translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y));
}

.-translate-y-1\/2 {
  --tw-translate-y: -50%;
  transform: translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y));
}

.rotate-180 {
  --tw-rotate: 180deg;
  transform: translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y));
}

.rotate-90 {
  --tw-rotate: 90deg;
  transform: translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y));
}

.\!transform {
  transform: translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y)) !important;
}

.transform {
  transform: translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y));
}

.cursor-pointer {
  cursor: pointer;
}

.select-none {
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
}

.resize {
  resize: both;
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.flex-col {
  flex-direction: column;
}

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

.justify-end {
  justify-content: flex-end;
}

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

.justify-between {
  justify-content: space-between;
}

.gap-1 {
  gap: 0.25rem;
}

.gap-1\.5 {
  gap: 0.375rem;
}

.gap-2 {
  gap: 0.5rem;
}

.gap-3 {
  gap: 0.75rem;
}

.space-y-0 > :not([hidden]) ~ :not([hidden]) {
  --tw-space-y-reverse: 0;
  margin-top: calc(0px * calc(1 - var(--tw-space-y-reverse)));
  margin-bottom: calc(0px * var(--tw-space-y-reverse));
}

.space-y-0\.5 > :not([hidden]) ~ :not([hidden]) {
  --tw-space-y-reverse: 0;
  margin-top: calc(0.125rem * calc(1 - var(--tw-space-y-reverse)));
  margin-bottom: calc(0.125rem * var(--tw-space-y-reverse));
}

.space-y-1 > :not([hidden]) ~ :not([hidden]) {
  --tw-space-y-reverse: 0;
  margin-top: calc(0.25rem * calc(1 - var(--tw-space-y-reverse)));
  margin-bottom: calc(0.25rem * var(--tw-space-y-reverse));
}

.space-y-2 > :not([hidden]) ~ :not([hidden]) {
  --tw-space-y-reverse: 0;
  margin-top: calc(0.5rem * calc(1 - var(--tw-space-y-reverse)));
  margin-bottom: calc(0.5rem * var(--tw-space-y-reverse));
}

.overflow-hidden {
  overflow: hidden;
}

.overflow-y-auto {
  overflow-y: auto;
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rounded {
  border-radius: 0.25rem;
}

.rounded-lg {
  border-radius: 0.5rem;
}

.rounded-xl {
  border-radius: 0.75rem;
}

.rounded-l {
  border-top-left-radius: 0.25rem;
  border-bottom-left-radius: 0.25rem;
}

.rounded-r {
  border-top-right-radius: 0.25rem;
  border-bottom-right-radius: 0.25rem;
}

.border {
  border-width: 1px;
}

.border-b {
  border-bottom-width: 1px;
}

.border-l {
  border-left-width: 1px;
}

.border-t {
  border-top-width: 1px;
}

.border-white\/10 {
  border-color: rgb(255 255 255 / 0.1);
}

.border-white\/20 {
  border-color: rgb(255 255 255 / 0.2);
}

.border-white\/5 {
  border-color: rgb(255 255 255 / 0.05);
}

.bg-black\/30 {
  background-color: rgb(0 0 0 / 0.3);
}

.bg-black\/40 {
  background-color: rgb(0 0 0 / 0.4);
}

.bg-black\/60 {
  background-color: rgb(0 0 0 / 0.6);
}

.bg-blue-500\/80 {
  background-color: rgb(59 130 246 / 0.8);
}

.bg-blue-900 {
  --tw-bg-opacity: 1;
  background-color: rgb(30 58 138 / var(--tw-bg-opacity));
}

.bg-gray-500\/80 {
  background-color: rgb(107 114 128 / 0.8);
}

.bg-gray-800 {
  --tw-bg-opacity: 1;
  background-color: rgb(31 41 55 / var(--tw-bg-opacity));
}

.bg-gray-800\/90 {
  background-color: rgb(31 41 55 / 0.9);
}

.bg-green-500\/80 {
  background-color: rgb(34 197 94 / 0.8);
}

.bg-orange-500\/80 {
  background-color: rgb(249 115 22 / 0.8);
}

.bg-purple-500\/80 {
  background-color: rgb(168 85 247 / 0.8);
}

.bg-white\/20 {
  background-color: rgb(255 255 255 / 0.2);
}

.p-0 {
  padding: 0px;
}

.p-0\.5 {
  padding: 0.125rem;
}

.p-1 {
  padding: 0.25rem;
}

.p-1\.5 {
  padding: 0.375rem;
}

.p-2 {
  padding: 0.5rem;
}

.p-2\.5 {
  padding: 0.625rem;
}

.p-3 {
  padding: 0.75rem;
}

.p-4 {
  padding: 1rem;
}

.px-1 {
  padding-left: 0.25rem;
  padding-right: 0.25rem;
}

.px-1\.5 {
  padding-left: 0.375rem;
  padding-right: 0.375rem;
}

.px-2 {
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}

.px-3 {
  padding-left: 0.75rem;
  padding-right: 0.75rem;
}

.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}

.px-5 {
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.py-0 {
  padding-top: 0px;
  padding-bottom: 0px;
}

.py-0\.5 {
  padding-top: 0.125rem;
  padding-bottom: 0.125rem;
}

.py-1 {
  padding-top: 0.25rem;
  padding-bottom: 0.25rem;
}

.py-1\.5 {
  padding-top: 0.375rem;
  padding-bottom: 0.375rem;
}

.py-10 {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}

.py-12 {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.py-2 {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.pb-2 {
  padding-bottom: 0.5rem;
}

.pl-2 {
  padding-left: 0.5rem;
}

.pl-4 {
  padding-left: 1rem;
}

.pt-2 {
  padding-top: 0.5rem;
}

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.font-mono {
  font-family: "Courier New", monospace;
}

.text-base {
  font-size: 1rem;
  line-height: 1.5rem;
}

.text-sm {
  font-size: 0.875rem;
  line-height: 1.25rem;
}

.text-xs {
  font-size: 0.75rem;
  line-height: 1rem;
}

.font-medium {
  font-weight: 500;
}

.font-semibold {
  font-weight: 600;
}

.uppercase {
  text-transform: uppercase;
}

.lowercase {
  text-transform: lowercase;
}

.italic {
  font-style: italic;
}

.leading-relaxed {
  line-height: 1.625;
}

.tracking-wide {
  letter-spacing: 0.025em;
}

.text-gray-200 {
  --tw-text-opacity: 1;
  color: rgb(229 231 235 / var(--tw-text-opacity));
}

.text-green-400 {
  --tw-text-opacity: 1;
  color: rgb(74 222 128 / var(--tw-text-opacity));
}

.text-white {
  --tw-text-opacity: 1;
  color: rgb(255 255 255 / var(--tw-text-opacity));
}

.text-white\/25 {
  color: rgb(255 255 255 / 0.25);
}

.text-white\/30 {
  color: rgb(255 255 255 / 0.3);
}

.text-white\/40 {
  color: rgb(255 255 255 / 0.4);
}

.text-white\/50 {
  color: rgb(255 255 255 / 0.5);
}

.text-white\/60 {
  color: rgb(255 255 255 / 0.6);
}

.text-white\/70 {
  color: rgb(255 255 255 / 0.7);
}

.text-white\/90 {
  color: rgb(255 255 255 / 0.9);
}

.opacity-0 {
  opacity: 0;
}

.opacity-100 {
  opacity: 1;
}

.opacity-50 {
  opacity: 0.5;
}

.opacity-60 {
  opacity: 0.6;
}

.opacity-70 {
  opacity: 0.7;
}

.opacity-80 {
  opacity: 0.8;
}

.shadow-2xl {
  --tw-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --tw-shadow-colored: 0 25px 50px -12px var(--tw-shadow-color);
  box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
}

.shadow-lg {
  --tw-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --tw-shadow-colored: 0 10px 15px -3px var(--tw-shadow-color), 0 4px 6px -4px var(--tw-shadow-color);
  box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
}

.outline {
  outline-style: solid;
}

.ring {
  --tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);
  --tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(3px + var(--tw-ring-offset-width)) var(--tw-ring-color);
  box-shadow: var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow, 0 0 #0000);
}

.filter {
  filter: var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow);
}

.backdrop-blur-sm {
  --tw-backdrop-blur: blur(4px);
  -webkit-backdrop-filter: var(--tw-backdrop-blur) var(--tw-backdrop-brightness) var(--tw-backdrop-contrast) var(--tw-backdrop-grayscale) var(--tw-backdrop-hue-rotate) var(--tw-backdrop-invert) var(--tw-backdrop-opacity) var(--tw-backdrop-saturate) var(--tw-backdrop-sepia);
          backdrop-filter: var(--tw-backdrop-blur) var(--tw-backdrop-brightness) var(--tw-backdrop-contrast) var(--tw-backdrop-grayscale) var(--tw-backdrop-hue-rotate) var(--tw-backdrop-invert) var(--tw-backdrop-opacity) var(--tw-backdrop-saturate) var(--tw-backdrop-sepia);
}

.transition {
  transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, -webkit-backdrop-filter;
  transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, backdrop-filter;
  transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, backdrop-filter, -webkit-backdrop-filter;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

.transition-colors {
  transition-property: color, background-color, border-color, text-decoration-color, fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

.transition-opacity {
  transition-property: opacity;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

.transition-transform {
  transition-property: transform;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

.duration-200 {
  transition-duration: 200ms;
}

.duration-300 {
  transition-duration: 300ms;
}

.ease-in-out {
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Custom utilities for CAD UI */

.glass-panel {
  background-color: rgba(0, 0, 0, 0.85);
  -webkit-backdrop-filter: blur(12px);
          backdrop-filter: blur(12px);
}

.scrollbar-thin {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.3) transparent;
}

.scrollbar-thin::-webkit-scrollbar {
  width: 6px;
}

.scrollbar-thin::-webkit-scrollbar-track {
  background: transparent;
}

.scrollbar-thin::-webkit-scrollbar-thumb {
  background-color: rgba(255, 255, 255, 0.3);
  border-radius: 3px;
}

/* System Info Panel Styles */

#system-info-chevron {
  transition-property: transform;
  transition-duration: 200ms;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Tree/Filesystem Explorer Styles */

.tree-item {
  position: relative;
}

.tree-expand-icon {
  transition-property: transform;
  transition-duration: 200ms;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.tree-item[data-expanded="true"] .tree-expand-icon {
  --tw-rotate: 90deg;
  transform: translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y));
}

.tree-children {
  transition-property: all;
  transition-duration: 300ms;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 2000px;
  /* Large enough for content */
  opacity: 1;
  overflow: hidden;
}

.tree-children[data-expanded="false"] {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
}

.tree-action-btn {
  display: flex;
  height: 1.5rem;
  width: 1.5rem;
  align-items: center;
  justify-content: center;
  border-radius: 0.25rem;
  transition-property: color, background-color, border-color, text-decoration-color, fill, stroke;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

.tree-action-btn:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.tree-action-btn.delete:hover {
  background-color: rgba(239, 68, 68, 0.3);
}

/* Object list container needs relative positioning for insertion line */

#object-list-container {
  position: relative;
}

/* Editing state */

.editing {
  background-color: rgba(33, 150, 243, 0.2);
  border: 2px solid rgb(33, 150, 243);
  border-radius: 0.25rem;
  padding-left: 0.25rem;
  padding-right: 0.25rem;
  outline: none;
}

/* Drag-and-drop visual feedback */

.dragging {
  opacity: 0.5;
  transform: scale(0.95);
}

/* Insertion line indicator */

/* Light theme overrides */

.light {
  --tw-bg-opacity: 1;
  background-color: rgb(249 250 251 / var(--tw-bg-opacity));
  --tw-text-opacity: 1;
  color: rgb(17 24 39 / var(--tw-text-opacity));
}

.light body {
  background-color: #f9fafb;
  color: #111827;
}

.light .cad-panel {
  background-color: rgba(255, 255, 255, 0.9);
  border-color: rgb(229, 231, 235);
}

.light .cad-toolbar-btn {
  background-color: rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.2);
  color: #1f2937;
}

.light .cad-toolbar-btn:hover {
  background-color: rgba(0, 0, 0, 0.1);
  border-color: rgba(0, 0, 0, 0.4);
}

.light .cad-toolbar-btn:active {
  background-color: rgba(0, 0, 0, 0.15);
}

.light .glass-panel {
  background-color: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(12px);
          backdrop-filter: blur(12px);
}

.light .scrollbar-thin {
  scrollbar-color: rgba(0, 0, 0, 0.3) transparent;
}

.light .scrollbar-thin::-webkit-scrollbar-thumb {
  background-color: rgba(0, 0, 0, 0.3);
}

.light .tree-action-btn:hover {
  background-color: rgba(0, 0, 0, 0.1);
}

/* --- Sidebar & History panel structure (Tailwind utility overrides) --- */

/* bg-black/* panels → light translucent white */

.light .bg-black\/30 {
  background-color: rgba(0, 0, 0, 0.04) !important;
}

.light .bg-black\/40 {
  background-color: rgba(0, 0, 0, 0.05) !important;
}

/* border-white/* → dark borders */

.light .border-white\/5 {
  border-color: rgba(0, 0, 0, 0.06) !important;
}

.light .border-white\/10 {
  border-color: rgba(0, 0, 0, 0.1) !important;
}

.light .border-white\/20 {
  border-color: rgba(0, 0, 0, 0.15) !important;
}

/* Panel collapse/expand tabs */

.light .bg-white\/20 {
  background-color: rgba(0, 0, 0, 0.1) !important;
}

.light .hover\:bg-white\/30:hover {
  background-color: rgba(0, 0, 0, 0.15) !important;
}

.light .hover\:bg-white\/5:hover {
  background-color: rgba(0, 0, 0, 0.05) !important;
}

/* Text color overrides: white/* variants → dark equivalents */

.light .text-white\/40 {
  color: rgba(0, 0, 0, 0.45) !important;
}

.light .text-white\/70 {
  color: rgba(0, 0, 0, 0.65) !important;
}

.light .text-white\/90 {
  color: rgba(0, 0, 0, 0.85) !important;
}

/* --- Object list items (generated by scene.rs) --- */

.light .object-item:hover {
  background-color: rgba(0, 0, 0, 0.06) !important;
}

.light .session-header {
  background-color: rgba(0, 0, 0, 0.05) !important;
}

.light .session-header:hover {
  background-color: rgba(0, 0, 0, 0.08) !important;
}

/* Selected object: blue-900 → lighter blue */

.light .bg-blue-900 {
  background-color: rgba(59, 130, 246, 0.15) !important;
}

/* Object action buttons */

.light .object-item button:hover {
  background-color: rgba(0, 0, 0, 0.08) !important;
}

.light .object-delete-btn:hover {
  background-color: rgba(239, 68, 68, 0.15) !important;
}

/* ===== Ribbon Light Mode ===== */

.light .ribbon {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: rgba(0, 0, 0, 0.1);
}

.light .ribbon__tab-strip {
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

.light .ribbon__tab {
  color: rgba(0, 0, 0, 0.45);
}

.light .ribbon__tab:hover {
  color: rgba(0, 0, 0, 0.75);
}

.light .ribbon__tab--active {
  color: #2563eb;
  border-bottom-color: #2563eb;
}

.light .ribbon__doc-name {
  color: rgba(0, 0, 0, 0.45);
}

.light .ribbon__share-btn {
  color: rgba(0, 0, 0, 0.45);
  border-color: rgba(0, 0, 0, 0.1);
}

.light .ribbon__share-btn:hover {
  color: rgba(0, 0, 0, 0.75);
  border-color: rgba(0, 0, 0, 0.2);
  background: rgba(0, 0, 0, 0.04);
}

.light .ribbon__collapse-btn {
  color: rgba(0, 0, 0, 0.35);
}

.light .ribbon__collapse-btn:hover {
  color: rgba(0, 0, 0, 0.7);
  background: rgba(0, 0, 0, 0.06);
}

.light .ribbon__section-label {
  color: rgba(0, 0, 0, 0.4);
}

.light .ribbon__divider {
  background: rgba(0, 0, 0, 0.1);
}

.light .ribbon__tool-btn {
  color: rgba(0, 0, 0, 0.7);
}

.light .ribbon__tool-btn:hover {
  background: rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.12);
}

.light .ribbon__tool-btn--active {
  background: rgba(37, 99, 235, 0.12);
  border-color: rgba(37, 99, 235, 0.4);
  color: #2563eb;
}

.light .ribbon__tool-btn--active:hover {
  background: rgba(37, 99, 235, 0.18);
}

.light .ribbon__split-btn-chevron {
  color: rgba(0, 0, 0, 0.35);
}

.light .ribbon__split-btn-chevron:hover {
  background: rgba(0, 0, 0, 0.06);
  color: rgba(0, 0, 0, 0.7);
}

.light .ribbon__poly-dropdown {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(0, 0, 0, 0.12);
}

.light .ribbon__poly-option {
  color: rgba(0, 0, 0, 0.75);
}

.light .ribbon__poly-option:hover {
  background: rgba(0, 0, 0, 0.06);
}

.light .ribbon__poly-option.active {
  background: rgba(37, 99, 235, 0.12);
  color: #2563eb;
}

.light .ribbon__plane-label {
  color: rgba(0, 0, 0, 0.5);
}

.light .ribbon__plane-input {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.12);
  color: rgba(0, 0, 0, 0.85);
}

.light .ribbon__plane-input:focus {
  border-color: rgba(37, 99, 235, 0.4);
  background: rgba(0, 0, 0, 0.06);
}

.light .ribbon__plane-separator {
  border-top-color: rgba(0, 0, 0, 0.08);
}

.hover\:bg-gray-600:hover {
  --tw-bg-opacity: 1;
  background-color: rgb(75 85 99 / var(--tw-bg-opacity));
}

.hover\:bg-gray-700:hover {
  --tw-bg-opacity: 1;
  background-color: rgb(55 65 81 / var(--tw-bg-opacity));
}

.hover\:bg-red-500\/30:hover {
  background-color: rgb(239 68 68 / 0.3);
}

.hover\:bg-red-600:hover {
  --tw-bg-opacity: 1;
  background-color: rgb(220 38 38 / var(--tw-bg-opacity));
}

.hover\:bg-white\/10:hover {
  background-color: rgb(255 255 255 / 0.1);
}

.hover\:bg-white\/30:hover {
  background-color: rgb(255 255 255 / 0.3);
}

.hover\:bg-white\/5:hover {
  background-color: rgb(255 255 255 / 0.05);
}

.hover\:text-red-400:hover {
  --tw-text-opacity: 1;
  color: rgb(248 113 113 / var(--tw-text-opacity));
}

.hover\:text-white:hover {
  --tw-text-opacity: 1;
  color: rgb(255 255 255 / var(--tw-text-opacity));
}