:root {
  --panel-bg: rgba(10, 10, 16, 0.96);
  --panel-border: rgba(255, 255, 255, 0.14);
  --panel-soft: rgba(255, 255, 255, 0.06);
  --panel-soft-strong: rgba(255, 255, 255, 0.11);

  --text: #8d9098;
  --muted: #5e8feea3;
  --accent: #5e8fee;

  --rail-fg: #5d626d;
  --rail-fg-active: #ffffff;

  --surface-1: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --surface-3: rgba(255, 255, 255, 0.08);
  --surface-4: rgba(255, 255, 255, 0.12);

  --header-surface: #202128;
  --footer-surface: #3d3f43a3;

  --range-track: #555;
  --range-track-hover: #888;

  --shadow: 0 14px 36px rgba(0, 0, 0, 0.35);

  --shell-radius: 0px;
  --content-radius: 0px;
  --shell-gap: 8px;

  --left-panel-width: min(350px, calc(100vw - 104px));
  --right-rail-width: 60px;
  --bottom-bar-height: 78px;
}

/* ========================================
   RESET / BASE
======================================== */

* {
  box-sizing: border-box;
  border: none;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #2a2d33;
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 12px;
}

body {
  direction: ltr;
  text-align: left;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
}

button {
  appearance: none;
  background: none;
  border: none;
  cursor: pointer;
  color: #ffffffa1;
  font-size: 14px;
}

button:hover {
  color: #fff;
}

input[type="color" i] {
  background: none;
}

/* ========================================
   APP LAYOUT
======================================== */

#app {
  position: relative;
  width: 100%;
  height: 100%;
  background: #2a2d33;
  overflow: hidden;
}

#appVersionBadge {
  min-height: 22px;
  padding: 0 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(10, 10, 16, 0.76);
  backdrop-filter: blur(10px);
  color: rgba(255, 255, 255, 0.78);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  pointer-events: none;
  user-select: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
  margin-left: auto;
}

#gpuCanvas,
#overlayCanvas {
  position: absolute;
  display: block;
}

#gpuCanvas {
  z-index: 0;
  left: 0;
  top: 0;
}

#overlayCanvas {
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

#overlayStatusBanner {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 12;
  padding: 10px 14px;
  border: 1px solid rgba(94, 143, 238, 0.38);
  background: rgba(15, 24, 42, 0.9);
  color: var(--accent);
  box-shadow: var(--shadow);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: 0.01em;
  pointer-events: none;
}

#overlayStatusBanner[hidden] {
  display: none;
}

#leftShell,
#rightToolRail,
#toolSettingsBar {
  position: absolute;
  background: var(--panel-bg);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  pointer-events: auto;
  z-index: 10;
}

/* ========================================
   LEFT SHELL / PANELS
======================================== */

#leftShell {
  top: 16px;
  left: 16px;
  width: var(--left-panel-width);
  max-width: calc(100vw - 108px);
  height: calc(100vh - 32px);
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: var(--shell-gap);
  padding: 6px;
  border-radius: var(--shell-radius);
  touch-action: pan-y;
}

#leftShellBrand,
#leftShellHeader,
#leftShellFooter {
  border-radius: var(--content-radius);
  background: var(--surface-1);
  padding: 10px;
}

#leftShellBrand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 30px;
}

#leftShellBrandLogo {
  display: block;
  max-width: min(100%, 180px);
  max-height: 30px;
  width: auto;
  height: auto;
  object-fit: contain;
}

#leftShellHeader {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
}

#leftShellMain {
  min-height: 0;
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr);
  gap: var(--shell-gap);
}

#leftShellFooter {
  display: grid;
  gap: 10px;
}

#transportRow {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

#transportPlayControl {
  display: flex;
  align-items: center;
  gap: 6px;
}

.transport-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  display: grid;
  place-items: center;
  background: var(--surface-2);
  color: var(--rail-fg);
  transition:
    color 0.16s ease,
    background-color 0.16s ease,
    border-color 0.16s ease,
    transform 0.15s ease,
    opacity 0.16s ease;
}

.transport-btn:hover {
  background: var(--surface-4);
  color: #fff;
}

.transport-btn:disabled {
  cursor: default;
  opacity: 0.48;
}

.transport-btn:disabled:hover {
  background: var(--surface-2);
  color: var(--rail-fg);
}

.transport-btn.is-active {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  color: var(--accent);
}

.transport-btn-icon {
  width: 30px;
  height: 30px;
  display: block;
  background-color: currentColor;

  -webkit-mask-image: var(--icon-url);
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;

  mask-image: var(--icon-url);
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
}

#projectMeta {
  min-width: 0;
}

#projectLabel {
  margin: 0;
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

#projectName {
  margin: 4px 0 0;
  width: 100%;
  min-width: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  border: none;
  outline: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#projectName:focus {
  color: #ffffff;
}

#headerActions {
  display: flex;
  gap: 8px;
  align-items: center;
  background: none;
}

#contextPanels {
  min-width: 0;
  min-height: 0;
  position: relative;
}

.context-panel {
  position: absolute;
  inset: 0;
  display: none;
  min-height: 0;
  border-radius: var(--content-radius);
  background: var(--surface-1);
  overflow: hidden;
  grid-template-rows: auto 1fr auto;
}

.context-panel.active {
  display: grid;
}

.context-panel-header,
.context-panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  color: #fff;
}

.context-panel-header {
  background: var(--header-surface);
}

.context-panel-footer {
  background: var(--footer-surface);
  min-height: 48px;
}

.context-panel-title {
  font-size: 16px;
  letter-spacing: 0.01em;
}

.context-panel-subtitle,
.panel-footer-note,
.placeholder-text,
.status {
  color: #ffffff69;
  font-size: 12px;
  line-height: 1.45;
}

.context-panel-body {
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 10px;
}

.context-panel-body::-webkit-scrollbar {
  width: 6px;
}

.context-panel-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
}

.context-panel-body::-webkit-scrollbar-track {
  background: transparent;
}

#layersPanelBody {
  padding: 6px 0;
  overflow: hidden;
}

#layersPanel {
  grid-template-rows: 1fr auto;
}

#leftShell.is-collapsed #leftShellHeader {
  padding: 8px 10px;
}

#leftShell.is-collapsed #leftShellBrand {
  display: none;
}

#leftShell.is-collapsed #projectName {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========================================
   LEFT NAV RAIL
======================================== */

#leftNavRail {
  min-height: 0;
  border-radius: var(--content-radius);
  background: var(--surface-1);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ========================================
   RIGHT TOOL RAIL
======================================== */

#rightToolRail {
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  width: var(--right-rail-width);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#overlayToggleBtn.tool-rail-footer-btn {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
}

#overlayToggleBtn.is-overlay-hidden {
  color: var(--accent);
}

/* ========================================
   TOOL SETTINGS BAR
======================================== */

#toolSettingsBar {
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  padding: 12px 56px 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  overflow: hidden;
  transition: padding 0.2s ease, width 0.22s ease;
}

#toolSettingsBar[aria-hidden="true"] {
  display: none;
}

#toolSettingsBar.is-collapsed {
  padding: 10px 12px;
  gap: 0;
}

#toolSettingsBar .tool-settings-stack > :not(.tool-settings-title-row) {
  overflow: hidden;
  max-height: 1200px;
  opacity: 1;
  transform: translateY(0);
  transition:
    max-height 0.22s ease,
    opacity 0.16s ease,
    transform 0.18s ease;
}

#toolSettingsBar.is-collapsed .tool-settings-stack > :not(.tool-settings-title-row) {
  max-height: 0;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
}

#toolSettingsBar.is-collapsed .tool-settings-view:not([hidden]) {
  display: block !important;
}

.tool-settings-collapse-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  min-height: 28px;
  padding: 6px 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1.1;
  border-radius: 8px;
  background: rgb(255 255 255 / 7%);
  border: 1px solid rgb(255 255 255 / 10%);
  color: #ffffffb8;
}

.tool-settings-collapse-btn:hover {
  color: #fff;
  background: rgb(255 255 255 / 12%);
}

.tool-settings-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

.tool-settings-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.tool-settings-grid {
  display: grid;
  grid-auto-flow: column;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px 14px;
  align-items: end;
  width: 100%;
}

.tool-setting-field {
  display: grid;
  gap: 6px;
  min-width: 0;
  grid-auto-flow: column;
  justify-content: start;
  align-items: center;
}

.tool-settings-grid-field {
  display: grid;
  width: 100%;
}

.tool-settings-grid-path {
  display: grid;
  width: 100%;
}

.tool-settings-grid-brush {
  display: grid;
  width: 100%;
}

.tool-settings-row {
  display: grid;
  gap: 12px;
  width: 100%;
  padding: 10px;
  border-top: 1px solid #333;
  grid-auto-flow: column;
  justify-items: center;
}

.tool-settings-row-field-top {
  grid-template-columns: 88px minmax(96px, 0.72fr) minmax(118px, 0.9fr) minmax(118px, 0.9fr) minmax(120px, 0.95fr) 140px;
}

.tool-settings-row-field-bottom {
  grid-template-columns: 88px repeat(5, minmax(110px, 1fr));
}

.tool-settings-row-field-ripple {
  grid-template-columns: 88px repeat(3, minmax(140px, 1fr));
}

.tool-settings-row-field-bloom {
  grid-template-columns: 88px minmax(140px, 1fr) minmax(140px, 1fr) minmax(180px, 220px);
}

.tool-settings-row-path-main {
  grid-template-columns: 88px minmax(0, 1fr);
}

.tool-settings-row-path-point {
  grid-template-columns: 88px minmax(130px, 1fr) minmax(130px, 1fr) minmax(120px, 140px) minmax(260px, 320px);
}

.tool-settings-row-brush-top {
  grid-template-columns: 88px minmax(220px, max-content) minmax(130px, 160px) minmax(110px, 130px) minmax(140px, 180px);
}

.tool-settings-row-brush-bottom {
  grid-template-columns: 88px repeat(4, minmax(110px, 1fr));
}

.tool-settings-path-main-layout {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.tool-settings-path-main-top,
.tool-settings-path-main-bottom {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.tool-settings-path-main-top {
  grid-template-columns: repeat(3, max-content) max-content;
  align-items: end;
  justify-content: start;
}

.tool-settings-path-main-bottom {
  grid-template-columns: repeat(4, minmax(110px, 1fr));
  padding: 10px 0;
}

.tool-settings-row[hidden] {
  display: none !important;
}

.tool-settings-side-label {
  font-size: 12px;
  line-height: 1.1;
  color: #ffffff8f;
  align-self: center;
}

.tool-settings-side-label div + div {
  margin-top: 2px;
}

.tool-setting-actions-field {
  display: flex;
  align-items: end;
  justify-content: flex-end;
  min-width: 0;
  height: 100%;
}

.tool-setting-actions-bloom {
  display: flex;
  align-items: end;
}

.tool-setting-actions-path-main {
  display: flex;
  gap: 8px;
  align-items: end;
  justify-content: flex-start;
}

.tool-setting-actions-path-point {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  align-items: end;
  min-width: 0;
}

.tool-action-button-stacked {
  min-height: 30px;
  padding: 6px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  white-space: nowrap;
  text-align: center;
}

.tool-action-symbol {
  font-size: 18px;
  line-height: 1;
  font-weight: 600;
}

.tool-action-label {
  font-size: 10px;
  line-height: 1.1;
  color: #ffffffa8;
}

.tool-setting-actions-brush {
  display: flex;
  align-items: end;
}

.tool-settings-brush-mode-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  min-width: 0;
}

.tool-settings-brush-mode-toggle button {
  min-height: 28px;
  padding: 6px 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1.15;
  border-radius: 8px;
}

.tool-settings-brush-mode-toggle button.is-active {
  background: #4b6fbc;
  border-color: #6c90dd;
  color: #fff;
}

.tool-settings-path-mode-toggle {
  min-width: 220px;
}

.tool-setting-actions-bloom button {
  width: 100%;
}

.tool-setting-field span:first-child {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tool-setting-field input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.tool-setting-field input[type="color"],
.tool-setting-field select {
  max-width: 100%;
}

.tool-setting-actions {
  min-width: 0;
}

.tool-setting-actions button {
  width: 100%;
}

.tool-settings-row-field-top .tool-setting-field,
.tool-settings-row-field-bottom .tool-setting-field,
.tool-settings-row-field-ripple .tool-setting-field,
.tool-settings-row-brush-top .tool-setting-field,
.tool-settings-row-brush-bottom .tool-setting-field,
.tool-settings-row-path-main .tool-setting-field,
.tool-settings-path-main-top .tool-setting-field,
.tool-settings-path-main-bottom .tool-setting-field,
.tool-settings-row-path-point .tool-setting-field {
  min-width: 0;
}

.tool-settings-row-field-top .tool-setting-field input[type="color"],
.tool-settings-row-brush-top .tool-setting-field input[type="color"],
.tool-settings-row-path-main .tool-setting-field input[type="color"],
.tool-settings-path-main-top .tool-setting-field input[type="color"],
.tool-settings-row-path-point .tool-setting-field input[type="color"] {
  width: 28px;
  height: 28px;
}

.switch-control {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 36px;
  height: 20px;
}

.switch-track {
  position: relative;
  width: 36px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  padding: 2px;
  border-radius: 999px;
  background: rgb(255 255 255 / 27%);
  border: none;
  box-shadow: none;
  transition: background-color 0.18s ease;
}

.switch-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgb(48 48 52);
  transition:
    transform 0.18s ease,
    background-color 0.18s ease;
}

.switch-control input:focus-visible + .switch-track {
  outline: 2px solid rgba(94, 143, 238, 0.72);
  outline-offset: 2px;
}

.switch-control input:checked + .switch-track {
  background: rgba(94, 143, 238, 0.34);
}

.switch-control input:checked + .switch-track .switch-thumb {
  transform: translateX(16px);
  background: var(--accent);
}

.switch-control input:disabled + .switch-track {
  opacity: 0.45;
}

.tool-settings-row-field-top .tool-setting-field select {
  min-height: 30px;
  background: rgba(255, 255, 255, 0.08);
  color: #d7def4;
}


/* ========================================
   SHARED UI PRIMITIVES
======================================== */

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.value {
  font-variant-numeric: tabular-nums;
}

button#exportBtn {
  background: var(--muted);
  color: #ffffff73;
}

button#toggleLeftShellBtn {
  font-size: 22px;
  padding: 0;
  min-width: 30px;
}

.icon-btn {
  padding: 6px 10px;
  font-size: 13px;
  transition:
    color 0.16s ease,
    background-color 0.16s ease,
    border-color 0.16s ease,
    transform 0.15s ease;
}

.icon-btn.compact {
  min-width: 42px;
  padding-inline: 10px;
}

.blob-actions .icon-btn.is-active {
  color: var(--accent);
}

/* ========================================
   CONTROLS / FORMS
======================================== */

.control {
  display: grid;
  align-items: center;
  gap: 8px;
  min-width: 0;
  width: 100%;
  padding: 10px 0;
  justify-items: start;
}

.control-range,
.control-color,
.control-toggle {
  grid-template-columns: minmax(74px, 1.05fr) minmax(0, 4.6fr) minmax(42px, 0.55fr);
}

.control-select {
  grid-template-columns: minmax(0, 2.15fr) minmax(0, 4.65fr);
}

.control-name,
.control-input,
.control-value {
  min-width: 0;
}

.control-name {
  font-size: 13px;
  color: var(--text);
}

.control-input {
  display: flex;
  align-items: center;
  min-width: 0;
  width: 100%;
}

.control-value {
  text-align: right;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.control-select select,
.control-input select,
.control-input input[type="range"],
.control-range input[type="range"] {
  width: 100%;
  min-width: 0;
  max-width: 100%;
}

.control-color-input {
  justify-content: flex-start;
}

.checkbox-inline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 13px;
}

.control-toggle input[type="checkbox"] {
  cursor: pointer;
}

.layer-switch-btn {
  width: 36px;
  height: 20px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
}

.layer-switch-btn .switch-track {
  pointer-events: none;
}

.layer-switch-btn[aria-pressed="true"] .switch-track {
  background: rgb(0 0 0 / 63%);
}

.layer-switch-btn[aria-pressed="true"] .switch-thumb {
  transform: translateX(16px);
  background: var(--accent);
}

.control-color input[type="color"] {
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid #585d77;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.control-color input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.control-color input[type="color"]::-webkit-color-swatch,
.control-color input[type="color"]::-moz-color-swatch {
  border: none;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  background: transparent;
  cursor: pointer;
  accent-color: var(--accent);
}

input[type="range"]::-webkit-slider-runnable-track {
  width: 100%;
  height: 1px;
  background: var(--range-track);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 16px;
  width: 16px;
  margin-top: -8px;
  border-radius: 50%;
  background: var(--accent);
  border: 1px solid #000;
}

input[type="range"]:hover::-webkit-slider-runnable-track {
  background: var(--range-track-hover);
}

select {
  width: 100%;
  padding: 6px 10px;
  background: var(--surface-3);
  color: var(--text);
  font-size: 13px;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

select option {
  background: #2f3238;
  color: #f3f4f6;
}

select option:checked,
select option:hover,
select option:focus {
  background: #111111;
  color: #f3f4f6;
}

input[type="number"] {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: var(--surface-3);
  color: var(--text);
  font-size: 13px;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  opacity: 1;
}

/* ========================================
   ANCHOR GRID
======================================== */

.anchor-grid {
  display: grid;
  grid-template-columns: repeat(3, 26px);
  grid-template-rows: repeat(3, 26px);
  gap: 7px;
  justify-content: start;
  align-items: center;
}

.anchor-dot-btn {
  width: 26px;
  height: 26px;
  padding: 0;
  display: grid;
  place-items: center;
  background: var(--surface-1);
  border: 1px solid var(--panel-border);
  transition:
    color 0.16s ease,
    background-color 0.16s ease,
    border-color 0.16s ease,
    transform 0.15s ease;
}

.anchor-dot-btn::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.34);
  transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.anchor-dot-btn:hover::before {
  background: rgba(255, 255, 255, 0.78);
  transform: scale(1.08);
}

.anchor-dot-btn.is-active {
  background: rgba(94, 143, 238, 0.14);
  border-color: rgba(94, 143, 238, 0.82);
}

.anchor-dot-btn.is-active::before {
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(94, 143, 238, 0.14);
}

/* ========================================
   LAYERS / BLOB LIST
======================================== */

.layer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.blob-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.blob-item,
.layers-panel-item {
  overflow: hidden;
  background: var(--surface-1);
}

.layers-panel-item {
  display: flex;
  flex-direction: column;
  flex: 0 0 auto;
  min-height: 32px;
}

.layers-panel-item.is-expanded {
  flex: 1 1 auto;
  min-height: 0;
}

.blob-item.is-disabled,
.layers-panel-item.is-disabled {
  opacity: 0.72;
}

.blob-item.is-disabled .blob-header:not(.selected),
.layers-panel-item.is-disabled .layers-panel-header:not(.selected) {
  background: #2b2e38;
}

.blob-header,
.layers-panel-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 2px 10px;
  cursor: pointer;
  background: var(--surface-3);
  min-height: 32px;
}

.blob-header.blob-header-compact {
  grid-template-columns: 1fr auto;
}

.layers-panel-header {
  grid-template-columns: 1fr auto;
}

.blob-header.selected {
  background: #2b3f68;
}

.layers-panel-header.selected {
  background: #406ac3;
}

.blob-header:hover,
.layers-panel-header:hover {
  background: #638de4cf;
}

.blob-layer-name {
  font-size: 11px;
  color: #a4c3ff;
  white-space: nowrap;
}

.blob-object-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  color: #cfdcff;
}

.layer-object-name {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
}

.blob-actions {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: flex-end;
}

.blob-panel,
.layers-panel-body {
  display: none;
  padding: 4px 2px 4px 4px;
  min-width: 0;
  overflow: hidden;
}

.layers-panel-item .layers-panel-body {
  flex: 1 1 auto;
  min-height: 0;
}

.blob-panel.open,
.blob-item.selected .blob-panel.open {
  display: grid;
  gap: 10px;
}

.layers-panel-body.open,
.layers-panel-item.selected .layers-panel-body.open {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border: 6px solid #406ac3;
}

.blob-panel-inner,
.layers-panel-body-inner {
  min-width: 0;
  width: 100%;
}

.layers-panel-item .layers-panel-body-inner {
  height: 100%;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 2px;
}

.layers-panel-item .layers-panel-body-inner::-webkit-scrollbar {
  width: 6px;
}

.layers-panel-item .layers-panel-body-inner::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.18);
}

.layers-panel-item .layers-panel-body-inner::-webkit-scrollbar-track {
  background: transparent;
}

.blob-layer-children {
  display: grid;
  gap: 6px;
}

.blob-child-item .blob-header {
  min-height: 30px;
  padding-inline: 8px;
}

.blob-child-item .blob-object-name {
  font-size: 12px;
}

.blob-child-item .blob-panel {
  padding: 8px;
}

.blob-child-item.selected {
    background: #111;
}

.background-field-layer-panel-inner {
  display: grid;
  gap: 8px;
}

.background-field-list {
  display: grid;
  gap: 6px;
}

.background-field-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px;
  align-items: center;
  width: 100%;
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  text-align: left;
}

.background-field-row:hover {
  background: rgba(255, 255, 255, 0.08);
}

.background-field-row.is-selected {
  background: rgba(94, 143, 238, 0.2);
  color: #d8e5ff;
}

.background-field-row.is-disabled .background-field-row-name,
.background-field-row.is-disabled .background-field-row-type {
  color: var(--muted);
}

.background-field-row-meta {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.background-field-row-name {
  font-size: 13px;
  color: #d7e2ff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.background-field-row-type {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.background-field-row-color {
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  overflow: hidden;
}

.background-field-row-color::-webkit-color-swatch-wrapper {
  padding: 0;
}

.background-field-row-color::-webkit-color-swatch,
.background-field-row-color::-moz-color-swatch {
  border: none;
  border-radius: 50%;
}

.background-field-row-delete {
  min-width: 26px;
  min-height: 26px;
  padding: 0 6px;
  color: var(--muted);
}

.background-field-row-delete:disabled {
  opacity: 0.38;
  cursor: default;
}

.background-field-row-delete:disabled:hover {
  color: var(--muted);
}

.background-field-layer-actions {
  display: flex;
  justify-content: flex-end;
}

/* ========================================
   RAIL ICON SYSTEM
======================================== */

.nav-rail-btn,
.tool-rail-btn {
  width: 100%;
  min-height: 40px;
  padding: 6px 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: transparent;
  color: var(--rail-fg);
  font-size: 11px;
  line-height: 1.15;
  text-align: center;
  transition:
    color 0.16s ease,
    background-color 0.16s ease,
    border-color 0.16s ease,
    transform 0.15s ease;
}

.nav-rail-btn:hover,
.tool-rail-btn:hover,
.nav-rail-btn.active,
.tool-rail-btn.active,
.nav-rail-btn[aria-pressed="true"],
.tool-rail-btn[aria-pressed="true"] {
  color: var(--rail-fg-active);
}

.nav-rail-btn-icon,
.tool-rail-btn-icon {
  width: 42px;
  height: 42px;
  display: block;
  flex: 0 0 auto;
  background-color: currentColor;

  -webkit-mask-image: var(--icon-url);
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;

  mask-image: var(--icon-url);
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;

  transition: transform 0.16s ease, background-color 0.16s ease;
}

.nav-rail-btn-label,
.tool-rail-btn-label {
  color: inherit;
  transition: color 0.16s ease;
}

/* ========================================
   SPECIAL CONTROLS
======================================== */

.control-shape-inline {
  grid-template-columns: minmax(30px, 1fr) minmax(0, 4.6fr);
}

.shape-button-row {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
}

.shape-icon-btn {
  width: 28px;
  height: 28px;
  padding: 0;
  display: grid;
  place-items: center;
  background: var(--surface-2);
  transition:
    color 0.16s ease,
    background-color 0.16s ease,
    border-color 0.16s ease,
    transform 0.15s ease;
}

.shape-icon-btn svg {
  width: 22px;
  height: 22px;
  display: block;
  color: var(--rail-fg);
}

.shape-icon-btn.active svg,
.shape-icon-btn:hover svg {
  color: #fff;
}

.shape-icon-btn.active {
  background: #5e8fee7a;
}

.shape-icon-btn:hover {
  background: var(--surface-4);
}

.control-section {
  display: grid;
  gap: 8px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.control-section-toggle {
  width: 100%;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  cursor: pointer;
}

.control-section-toggle:hover {
  background: rgba(255, 255, 255, 0.10);
}

.control-section-title {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: #c9d6f6;
}

.control-section-chevron {
  font-size: 12px;
  color: var(--muted);
}

.control-section-body {
  display: grid;
  gap: 8px;
}

.control-section-body[hidden] {
  display: none;
}

.blob-palette-panel {
  display: grid;
  gap: 10px;
  padding-top: 2px;
}

.blob-palette-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.blob-palette-swatch {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.18);
  background: var(--swatch-color, #ffffff);
  box-shadow:
    inset 0 0 0 1px rgba(0, 0, 0, 0.18),
    0 0 0 0 rgba(125, 211, 252, 0);
  transition:
    transform 0.16s ease,
    border-color 0.16s ease,
    box-shadow 0.16s ease;
  min-width: 28px;
  padding: 0;
}

.blob-palette-swatch:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.42);
}

.blob-palette-swatch.is-active {
  border-color: rgba(125, 211, 252, 0.92);
  box-shadow:
    inset 0 0 0 1px rgba(0, 0, 0, 0.18),
    0 0 0 3px rgba(125, 211, 252, 0.18);
}

.blob-palette-actions {
  display: inline-flex;
  gap: 6px;
  margin-inline-start: 4px;
}

.blob-palette-actions .icon-btn {
  min-width: 30px;
  padding: 4px 8px;
}

.blob-palette-editor-card {
  display: grid;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.blob-palette-editor-heading {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.blob-palette-empty {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.54);
}

.starter-preset-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.starter-preset-btn,
.scene-preset-btn {
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  display: grid;
  place-items: center;
  background: var(--surface-2);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #e5eaf8;
  font-size: 13px;
  font-weight: 700;
  transition:
    color 0.16s ease,
    background-color 0.16s ease,
    border-color 0.16s ease,
    transform 0.15s ease;
}

.starter-preset-btn:hover,
.scene-preset-btn:hover {
  background: var(--surface-4);
}

.starter-preset-btn.is-active,
.scene-preset-btn.is-active {
  background: rgba(94, 143, 238, 0.18);
  border-color: rgba(94, 143, 238, 0.8);
  color: #fff;
}

/* ========================================
   FALLBACK
======================================== */

.fallback {
  position: absolute;
  inset: 0;
  display: none;
  place-items: center;
  padding: 24px;
  text-align: center;
  z-index: 20;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 100, 140, 0.34), transparent 28%),
    radial-gradient(circle at 70% 35%, rgba(90, 140, 255, 0.28), transparent 30%),
    radial-gradient(circle at 55% 70%, rgba(255, 180, 80, 0.22), transparent 32%),
    linear-gradient(135deg, #090b12, #121829 50%, #0c0f18);
}

.fallback-card {
  width: min(520px, 100%);
  padding: 24px;
  background: rgba(8, 10, 18, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
}

.fallback-card h2 {
  margin: 0 0 10px;
  font-size: 24px;
}

.fallback-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

/* ========================================
   RESPONSIVE STATE LAYOUT
======================================== */

#leftShellBackdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 6, 12, 0.46);
  backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
  z-index: 9;
}

#app[data-left-shell-open="true"][data-layout^="tablet"] #leftShellBackdrop,
#app[data-left-shell-open="true"][data-layout="mobile"] #leftShellBackdrop {
  opacity: 1;
  pointer-events: auto;
}

#app[data-layout="desktop"] #leftShell {
  top: 16px;
  left: 16px;
  width: var(--left-panel-width);
  max-width: calc(100vw - 108px);
  height: calc(100vh - 32px);
  transform: none;
  opacity: 1;
  visibility: visible;
  transition:
    transform 180ms ease,
    opacity 180ms ease,
    width 180ms ease,
    height 180ms ease;
}

#app[data-layout^="tablet"] #leftShell,
#app[data-layout="mobile"] #leftShell {
  top: 12px;
  left: 12px;
  width: min(420px, calc(100vw - 24px - var(--right-rail-width) - 16px));
  max-width: min(420px, calc(100vw - 24px - var(--right-rail-width) - 16px));
  height: calc(100vh - 24px);
  max-height: calc(100vh - 24px);
  z-index: 11;
  transform: translateX(calc(-100% - 24px));
  opacity: 0;
  visibility: hidden;
  transition:
    transform 180ms ease,
    opacity 180ms ease,
    visibility 0s linear 180ms;
}

#app[data-left-shell-open="true"][data-layout^="tablet"] #leftShell,
#app[data-left-shell-open="true"][data-layout="mobile"] #leftShell {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
  transition:
    transform 180ms ease,
    opacity 180ms ease,
    visibility 0s linear 0s;
}

#app[data-layout="tablet-portrait"] #leftShell {
  width: min(460px, calc(100vw - 24px));
  max-width: calc(100vw - 24px);
}

#app[data-layout="desktop"] #leftShell.is-collapsed {
  width: 320px;
  height: auto;
  grid-template-rows: auto;
}

#app[data-layout="desktop"] #leftShell.is-collapsed #leftShellMain,
#app[data-layout="desktop"] #leftShell.is-collapsed #leftShellFooter {
  display: none;
}

#app[data-layout^="tablet"] #leftShell.is-collapsed,
#app[data-layout="mobile"] #leftShell.is-collapsed {
  width: min(420px, calc(100vw - 24px - var(--right-rail-width) - 16px));
  height: calc(100vh - 24px);
  grid-template-rows: auto 1fr auto;
}

#app[data-layout^="tablet"] #leftShell.is-collapsed #leftShellMain,
#app[data-layout^="tablet"] #leftShell.is-collapsed #leftShellFooter,
#app[data-layout="mobile"] #leftShell.is-collapsed #leftShellMain,
#app[data-layout="mobile"] #leftShell.is-collapsed #leftShellFooter {
  display: grid;
}

#app[data-layout="tablet-landscape"] #toolSettingsBar,
#app[data-layout="tablet-portrait"] #toolSettingsBar {
  width: calc(100vw - 32px);
}

#app[data-layout="mobile"] #toolSettingsBar {
  width: calc(100vw - 24px);
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-grid,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-grid,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-grid {
  gap: 8px 10px;
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-row-field-top,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-row-field-top,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-row-field-top {
  grid-template-columns: 78px repeat(5, minmax(0, 1fr));
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-row-field-bottom,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-row-field-bottom,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-row-field-bottom {
  grid-template-columns: 78px repeat(5, minmax(0, 1fr));
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-row-field-ripple,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-row-field-ripple,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-row-field-ripple {
  grid-template-columns: 78px repeat(3, minmax(0, 1fr));
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-row-field-bloom,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-row-field-bloom,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-row-field-bloom {
  grid-template-columns: 78px repeat(3, minmax(0, 1fr));
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-row-path-main,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-row-path-main,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-row-path-main {
  grid-template-columns: 78px minmax(0, 1fr);
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-path-main-top,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-path-main-top,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-path-main-top {
  grid-template-columns: repeat(3, max-content) max-content;
  justify-content: start;
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-path-main-bottom,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-path-main-bottom,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-path-main-bottom {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-row-path-point,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-row-path-point,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-row-path-point {
  grid-template-columns: 78px minmax(0, 1fr) minmax(0, 1fr) minmax(100px, 120px) minmax(220px, 1.5fr);
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-row-brush-top,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-row-brush-top,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-row-brush-top {
  grid-template-columns: 78px minmax(0, 1fr) minmax(110px, 1fr) minmax(100px, 110px);
}

#app[data-layout="tablet-landscape"] #toolSettingsBar .tool-settings-row-brush-bottom,
#app[data-layout="tablet-portrait"] #toolSettingsBar .tool-settings-row-brush-bottom,
#app[data-layout="mobile"] #toolSettingsBar .tool-settings-row-brush-bottom {
  grid-template-columns: 78px repeat(2, minmax(0, 1fr));
}

#app[data-layout="tablet-landscape"] button#toggleLeftShellBtn,
#app[data-layout="tablet-portrait"] button#toggleLeftShellBtn,
#app[data-layout="mobile"] button#toggleLeftShellBtn {
  font-size: 18px;
}

#leftShellLauncherBtn {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 12;
  width: 44px;
  height: 44px;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  line-height: 1;
  border-radius: 12px;
  background: rgba(10, 10, 16, 0.82);
  color: #fff;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

#app[data-layout^="tablet"] #leftShellLauncherBtn,
#app[data-layout="mobile"] #leftShellLauncherBtn {
  display: inline-flex;
}

#app[data-left-shell-open="true"][data-layout^="tablet"] #leftShellLauncherBtn,
#app[data-left-shell-open="true"][data-layout="mobile"] #leftShellLauncherBtn {
  display: none;
}

#app[data-layout="desktop"] #leftShellLauncherBtn {
  display: none;
}

/* ========================================
   MEDIA QUERIES
======================================== */

@media (max-width: 980px) {
  :root {
    --left-panel-width: min(320px, calc(100vw - 96px));
  }
}

@media (max-width: 760px) {
  :root {
    --right-rail-width: 56px;
  }
}