:root {
  color-scheme: dark;
  --page: #080a0c;
  --panel: rgba(12, 15, 18, 0.9);
  --panel-solid: #0f1215;
  --text: #f1f4f5;
  --text-dim: #aeb8bc;
  --text-faint: #657176;
  --line: #344047;
  --line-strong: #53636b;
  --left: #51d4c8;
  --right: #ff806e;
  --accent: #ffd447;
  --correct: #75df86;
  --danger: #ff6b72;
  --canvas: #080a0c;
}

:root[data-theme="light"] {
  color-scheme: light;
  --page: #e8edf0;
  --panel: rgba(244, 247, 248, 0.92);
  --panel-solid: #f4f7f8;
  --text: #182126;
  --text-dim: #44545c;
  --text-faint: #74858d;
  --line: #aab7bd;
  --line-strong: #73868f;
  --left: #007f79;
  --right: #c63f32;
  --accent: #7a38a3;
  --correct: #177d3b;
  --danger: #bd2435;
  --canvas: #dfe6e9;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--page);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

button,
select,
input {
  font: inherit;
}

button,
select,
input[type="range"] {
  touch-action: manipulation;
}

#cube-app {
  position: relative;
  width: 100%;
  height: 100%;
  min-width: 320px;
  isolation: isolate;
}

#cube-app.cursor-paired,
#cube-app.cursor-paired * {
  cursor: none !important;
}

.stereo-cursors {
  position: absolute;
  z-index: 40;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.stereo-cursor {
  position: absolute;
  top: 0;
  left: 0;
  width: 18px;
  height: 18px;
  border: 1px solid color-mix(in srgb, var(--accent) 82%, white);
  border-radius: 50%;
  opacity: 0;
  transform: translate3d(-50%, -50%, 0);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--page) 70%, transparent);
  transition: opacity 90ms ease, border-radius 90ms ease;
  will-change: transform;
}

#cube-app.spatial-tracking .stereo-cursor {
  border-color: #65e6bb;
  box-shadow: 0 0 0 2px color-mix(in srgb, #65e6bb 28%, transparent);
}

.finger-status {
  min-width: 7.5rem;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0;
  text-align: center;
}

.finger-status[data-state="tracking"] {
  color: #65e6bb;
}

.stereo-cursor::before,
.stereo-cursor::after {
  position: absolute;
  content: "";
  background: currentColor;
}

.stereo-cursor::before {
  top: 8px;
  left: 3px;
  width: 10px;
  height: 1px;
}

.stereo-cursor::after {
  top: 3px;
  left: 8px;
  width: 1px;
  height: 10px;
}

#cube-app.cursor-paired .stereo-cursor {
  opacity: 0.96;
}

#cube-app.cursor-pressed .stereo-cursor {
  border-radius: 3px;
}

#stereo-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  outline: none;
  cursor: grab;
  touch-action: none;
}

#stereo-canvas:active {
  cursor: grabbing;
}

.eye-divider {
  position: absolute;
  z-index: 14;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: var(--line);
  pointer-events: none;
}

.fusion-guides {
  position: absolute;
  z-index: 3;
  top: 116px;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  pointer-events: none;
}

.fusion-guides > div {
  display: grid;
  place-items: center;
}

.fusion-guides span {
  position: relative;
  width: 12px;
  height: 12px;
  border: 1px solid color-mix(in srgb, var(--text-dim) 72%, transparent);
  border-radius: 50%;
  opacity: 0.78;
}

.fusion-guides span::before,
.fusion-guides span::after {
  position: absolute;
  content: "";
  background: var(--text-dim);
  opacity: 0.68;
}

.fusion-guides span::before {
  top: 5px;
  left: -4px;
  width: 18px;
  height: 1px;
}

.fusion-guides span::after {
  top: -4px;
  left: 5px;
  width: 1px;
  height: 18px;
}

.eye-label {
  position: absolute;
  z-index: 4;
  top: 140px;
  display: flex;
  align-items: center;
  gap: 7px;
  pointer-events: none;
  user-select: none;
}

.eye-label-left {
  left: 16px;
}

.eye-label-right {
  right: 16px;
}

.eye-label-tens {
  color: var(--left);
}

.eye-label-ones {
  color: var(--right);
}

.eye-label-full {
  color: var(--accent);
}

.eye-label b {
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 11px;
}

.eye-label span {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.topbar {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: minmax(126px, auto) minmax(116px, 1fr) auto minmax(116px, 1fr);
  align-items: center;
  min-height: 54px;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.stereo-chrome {
  right: auto;
  width: 50%;
}

.stereo-chrome.stereo-left {
  left: 0;
}

.stereo-chrome.stereo-right {
  left: 50%;
}

.topbar.stereo-chrome {
  grid-template-columns: minmax(112px, auto) minmax(116px, 1fr) auto;
  gap: 8px;
}

.topbar.stereo-chrome .wordmark {
  display: none;
}

.topbar.stereo-chrome .mission {
  min-width: 154px;
}

.topbar.stereo-chrome .icon-button {
  width: 32px;
  height: 32px;
}

.demo-nav {
  display: inline-flex;
  justify-self: start;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-solid);
}

.demo-nav:focus-within,
.demo-nav:hover {
  border-color: var(--accent);
}

.demo-nav select {
  min-height: 32px;
  padding: 0 34px 0 11px;
  border: 0;
  appearance: none;
  outline: none;
  background:
    linear-gradient(45deg, transparent 50%, var(--text-dim) 50%) right 15px center / 5px 5px no-repeat,
    linear-gradient(135deg, var(--text-dim) 50%, transparent 50%) right 10px center / 5px 5px no-repeat,
    transparent;
  color: var(--text);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}

.wordmark {
  justify-self: start;
  margin-left: 13px;
  color: var(--text);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}

.wordmark span {
  color: var(--text-faint);
  font-weight: 600;
}

.mission {
  display: grid;
  grid-template-columns: auto auto auto;
  align-items: baseline;
  justify-content: center;
  gap: 9px;
  min-width: 206px;
  white-space: nowrap;
}

.mission-label,
#progress,
[data-stereo-source="progress"] {
  color: var(--text-faint);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

#target-number,
[data-stereo-source="target-number"] {
  min-width: 2.2ch;
  color: var(--accent);
  font: 800 25px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0;
  text-align: center;
}

.top-actions {
  display: flex;
  justify-self: end;
  gap: 6px;
}

.rgbar {
  position: absolute;
  z-index: 9;
  top: 54px;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 46px;
  padding: 6px 12px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  overscroll-behavior-x: contain;
}

.rgbar.stereo-chrome {
  gap: 11px;
  scrollbar-width: thin;
}

.rgbar.stereo-chrome .rg-readout {
  display: none;
}

.rgbar.stereo-chrome .rg-level-control {
  min-width: 180px;
}

.rgbar.stereo-chrome .rg-level-control input {
  width: 92px;
}

.rgbar-title {
  flex: 0 0 auto;
  color: var(--accent);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.select-control,
.rg-level-control {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 7px;
  color: var(--text-faint);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.select-control select {
  min-height: 30px;
  padding: 0 28px 0 9px;
  border: 1px solid var(--line);
  border-radius: 5px;
  appearance: none;
  outline: none;
  background:
    linear-gradient(45deg, transparent 50%, var(--text-dim) 50%) right 13px center / 4px 4px no-repeat,
    linear-gradient(135deg, var(--text-dim) 50%, transparent 50%) right 9px center / 4px 4px no-repeat,
    var(--panel-solid);
  color: var(--text);
  font-size: 9px;
  font-weight: 800;
  cursor: pointer;
}

.select-control:focus-within select,
.select-control:hover select {
  border-color: var(--accent);
}

.rg-level-control {
  min-width: 208px;
}

.rg-level-control input {
  width: 112px;
}

.rg-level-control output {
  min-width: 25px;
  color: var(--text);
  font-size: 11px;
  letter-spacing: 0;
}

.rg-readout {
  flex: 0 0 auto;
  margin-left: auto;
  color: var(--text-dim);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.icon-button {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--panel-solid);
  color: var(--text-dim);
  font-size: 15px;
  cursor: pointer;
  transition: border-color 120ms, color 120ms, background 120ms;
}

.icon-button:hover,
.icon-button:focus-visible,
.icon-button[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

.icon-button[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--panel-solid));
}

.translate-button {
  font-size: 12px;
  font-weight: 800;
}

.result-toast {
  position: absolute;
  z-index: 8;
  top: 50%;
  left: 50%;
  min-width: 126px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0.96);
  transition: opacity 130ms, transform 130ms;
}

.result-toast.stereo-toast-left {
  left: 25%;
}

.result-toast.stereo-toast-right {
  left: 75%;
}

.result-toast.visible {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.result-toast.correct {
  border-color: var(--correct);
  color: var(--correct);
}

.result-toast.wrong {
  border-color: var(--danger);
  color: var(--danger);
}

.controlbar {
  position: absolute;
  z-index: 10;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  min-height: 62px;
  padding: 9px 14px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.controlbar.stereo-chrome {
  justify-content: flex-start;
  gap: 14px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}

.controlbar.stereo-chrome .control-group {
  grid-template-columns: auto minmax(76px, 104px) 34px;
  flex: 0 0 auto;
  min-width: 166px;
  gap: 7px;
}

.controlbar.stereo-chrome .reset-view {
  flex: 0 0 auto;
}

.mode-switch {
  display: inline-flex;
  flex: 0 0 auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-solid);
}

.mode-switch button {
  min-height: 32px;
  padding: 0 10px;
  border: 0;
  background: transparent;
  color: var(--text-faint);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.05em;
  cursor: pointer;
}

.mode-switch button + button {
  border-left: 1px solid var(--line);
}

.mode-switch button:hover,
.mode-switch button:focus-visible {
  color: var(--accent);
  outline: none;
}

.mode-switch button[aria-pressed="true"] {
  background: var(--accent);
  color: var(--panel-solid);
}

.control-group {
  display: grid;
  grid-template-columns: auto minmax(92px, 150px) 38px;
  align-items: center;
  gap: 9px;
  min-width: 196px;
}

.control-group label,
.control-group output {
  color: var(--text-faint);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.control-group output {
  color: var(--text-dim);
  letter-spacing: 0;
  text-align: right;
}

input[type="range"] {
  width: 100%;
  height: 18px;
  margin: 0;
  appearance: none;
  background: transparent;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--line-strong);
}

input[type="range"]::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  margin-top: -6px;
  appearance: none;
  border: 2px solid var(--panel-solid);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--line-strong);
}

input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border: 2px solid var(--panel-solid);
  border-radius: 50%;
  background: var(--accent);
}

input[type="range"]:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

.reset-view {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-solid);
  color: var(--text-dim);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
}

.reset-view:hover,
.reset-view:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

.help-dialog {
  width: 100vw;
  max-width: none;
  height: 100vh;
  max-height: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 0;
  background: transparent;
  color: var(--text);
}

.help-dialog[open] {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
}

.help-dialog::after {
  position: fixed;
  z-index: 2;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: var(--line-strong);
  content: "";
  pointer-events: none;
}

.help-panel {
  --help-far-x: -14px;
  width: min(680px, calc(100% - 28px));
  max-height: min(760px, calc(100vh - 28px));
  margin: auto;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: var(--panel-solid);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.52);
  transform-origin: 50% 50%;
  transform-style: preserve-3d;
  will-change: transform, opacity;
}

.help-panel.stereo-left {
  grid-column: 1;
}

.help-panel.stereo-right {
  --help-far-x: 14px;
  grid-column: 2;
}

.help-dialog[data-stereo-mode="cross"] .help-panel.stereo-left {
  --help-far-x: 14px;
}

.help-dialog[data-stereo-mode="cross"] .help-panel.stereo-right {
  --help-far-x: -14px;
}

.help-dialog::backdrop {
  background: rgba(0, 0, 0, 0.68);
}

.help-dialog.opening .help-panel {
  animation: help-depth-in 300ms cubic-bezier(0.2, 0.76, 0.2, 1) both;
}

.help-dialog.closing {
  pointer-events: none;
}

.help-dialog.closing .help-panel {
  animation: help-depth-out 250ms cubic-bezier(0.55, 0.02, 0.78, 0.35) both;
}

.help-dialog.opening::backdrop {
  animation: help-backdrop-in 300ms ease-out both;
}

.help-dialog.closing::backdrop {
  animation: help-backdrop-out 250ms ease-in both;
}

.help-header,
.help-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
}

.help-header {
  border-bottom: 1px solid var(--line);
}

.help-header > div {
  min-width: 0;
}

.help-kicker {
  color: var(--text-faint);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.help-header h2 {
  margin: 5px 0 0;
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: 0;
}

.dialog-close {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--text-dim);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

.dialog-close:hover,
.dialog-close:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

.help-content {
  max-height: calc(100vh - 210px);
  padding: 18px;
  overflow-y: auto;
}

.help-lead {
  margin: 0 0 18px;
  color: var(--text-dim);
  font: 600 13px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.view-methods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-block: 1px solid var(--line);
}

.view-methods section {
  min-width: 0;
  padding: 17px 16px 17px 0;
}

.view-methods section + section {
  padding-right: 0;
  padding-left: 16px;
  border-left: 1px solid var(--line);
}

.view-methods h3 {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.view-methods p {
  margin: 10px 0 0;
  color: var(--text-faint);
  font-size: 11px;
  line-height: 1.55;
}

.eye-map {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.eye-map span {
  min-width: 0;
  padding: 8px 5px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--text-dim);
  font-size: 10px;
  font-weight: 800;
  text-align: center;
}

.parallel-map span:first-child,
.cross-map span:last-child {
  border-color: var(--left);
  color: var(--left);
}

.parallel-map span:last-child,
.cross-map span:first-child {
  border-color: var(--right);
  color: var(--right);
}

.help-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 20px;
  margin: 18px 0 0;
}

.help-controls > div {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 62%, transparent);
}

.help-controls dt,
.help-controls dd {
  margin: 0;
  font-size: 10px;
  line-height: 1.4;
}

.help-controls dt {
  color: var(--text);
  font-weight: 800;
}

.help-controls dd {
  color: var(--text-faint);
}

.comfort-note {
  margin: 18px 0 0;
  padding-left: 11px;
  border-left: 2px solid var(--right);
  color: var(--text-dim);
  font-size: 10px;
  line-height: 1.55;
}

.merge-help {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.merge-help h3 {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.merge-help > p {
  margin: 0 0 10px;
  color: var(--text-dim);
  font-size: 10px;
  line-height: 1.5;
}

.merge-help > div {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
}

.merge-help > div p {
  margin: 0;
  padding: 12px;
  color: var(--text-faint);
  font-size: 9px;
  line-height: 1.45;
}

.merge-help > div p + p {
  border-left: 1px solid var(--line);
}

.merge-help b,
.merge-help span {
  display: block;
}

.merge-help b {
  margin-bottom: 5px;
  color: var(--text);
  font-size: 9px;
}

.help-footer {
  justify-content: flex-end;
  border-top: 1px solid var(--line);
}

.help-footer button {
  min-height: 34px;
  padding: 0 15px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: var(--panel-solid);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.05em;
  cursor: pointer;
}

.help-footer button:hover,
.help-footer button:focus-visible {
  filter: brightness(1.08);
  outline: 1px solid var(--text);
  outline-offset: 2px;
}

@media (max-width: 900px) {
  .topbar {
    grid-template-columns: auto 1fr auto;
  }

  .wordmark {
    display: none;
  }

  .topbar.stereo-chrome {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .topbar.stereo-chrome .demo-nav {
    display: none;
  }

  .topbar.stereo-chrome .mission {
    min-width: 0;
    justify-content: start;
  }

  .mission {
    min-width: 0;
  }

  .controlbar {
    justify-content: flex-start;
    gap: 20px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
  }

  .control-group {
    flex: 0 0 auto;
  }

  .reset-view {
    flex: 0 0 auto;
  }
}

@media (max-width: 620px) {
  .topbar {
    grid-template-columns: auto 1fr auto;
    min-height: 54px;
    padding: 8px;
  }

  .topbar.stereo-chrome {
    gap: 3px;
    padding-inline: 5px;
  }

  .demo-nav select {
    width: 104px;
    padding-left: 9px;
  }

  .mission {
    grid-template-columns: auto auto;
    gap: 4px 7px;
  }

  .mission-label {
    display: none;
  }

  #target-number,
  [data-stereo-source="target-number"] {
    font-size: 22px;
  }

  #progress,
  [data-stereo-source="progress"] {
    font-size: 9px;
  }

  .top-actions {
    gap: 4px;
  }

  .topbar.stereo-chrome .translate-button,
  .topbar.stereo-chrome .top-actions button:last-child {
    display: none;
  }

  .icon-button {
    width: 30px;
    height: 32px;
  }

  .topbar.stereo-chrome .icon-button {
    width: 28px;
    height: 30px;
  }

  .rgbar.stereo-chrome {
    padding-inline: 8px;
  }

  .rgbar.stereo-chrome .rgbar-title {
    display: none;
  }

  .eye-label {
    top: 126px;
  }

  .eye-label span {
    display: none;
  }

  .fusion-guides {
    top: 112px;
  }

  .controlbar {
    gap: 16px;
    min-height: 58px;
    padding: 8px 10px;
  }

  .control-group {
    grid-template-columns: auto 96px 34px;
    min-width: 180px;
  }

  .help-panel {
    width: calc(100% - 8px);
    max-height: calc(100vh - 16px);
  }

  .help-header,
  .help-footer {
    padding: 13px 14px;
  }

  .help-content {
    max-height: calc(100vh - 174px);
    padding: 14px;
  }

  .help-controls > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .help-header h2 {
    font-size: 15px;
  }

  .help-kicker {
    font-size: 8px;
  }

  .view-methods,
  .help-controls {
    grid-template-columns: 1fr;
  }

  .view-methods section,
  .view-methods section + section {
    padding: 14px 0;
  }

  .view-methods section + section {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .merge-help > div {
    grid-template-columns: 1fr;
  }

  .merge-help > div p + p {
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (max-height: 560px) {
  .fusion-guides,
  .eye-label,
  .rg-readout {
    display: none;
  }

  .controlbar {
    min-height: 52px;
    padding-block: 6px;
  }
}

@keyframes help-depth-in {
  from {
    opacity: 0;
    transform: perspective(1200px) translate3d(var(--help-far-x), 0, -420px);
  }
  to {
    opacity: 1;
    transform: perspective(1200px) translate3d(0, 0, 0);
  }
}

@keyframes help-depth-out {
  from {
    opacity: 1;
    transform: perspective(1200px) translate3d(0, 0, 0);
  }
  to {
    opacity: 0;
    transform: perspective(1200px) translate3d(var(--help-far-x), 0, -520px);
  }
}

@keyframes help-backdrop-in {
  from {
    background: rgba(0, 0, 0, 0);
  }
  to {
    background: rgba(0, 0, 0, 0.68);
  }
}

@keyframes help-backdrop-out {
  from {
    background: rgba(0, 0, 0, 0.68);
  }
  to {
    background: rgba(0, 0, 0, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}