:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --ink: #1e2430;
  --muted: #697386;
  --line: #dde3ee;
  --blue: #2f73ff;
  --green: #20a67a;
  --amber: #f3a712;
  --coral: #f46d5e;
  --shadow: 0 18px 50px rgba(30, 36, 48, 0.12);
  --surface: #ffffff;
  --surface-soft: #f9fbfe;
  --surface-hover: #eef2f7;
  --slot: #d9dbe0;
  --editor: #111827;
  --editor-gutter: #0d1320;
  --editor-ink: #eef4ff;
}

:root[data-theme="dark"] {
  --bg: #0f1724;
  --panel: #182231;
  --ink: #edf3fb;
  --muted: #a9b6c8;
  --line: #344256;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.34);
  --surface: #182231;
  --surface-soft: #202d3e;
  --surface-hover: #29384c;
  --slot: #253245;
  --editor: #0b111c;
  --editor-gutter: #080d16;
  --editor-ink: #f2f6fc;
  color-scheme: dark;
}

:root[data-theme="dark"] .lesson-hint { color: #f7d9a6; background: #3b2b19; }
:root[data-theme="dark"] .reference-category { color: #dbe7f6; background: #314158; }
:root[data-theme="dark"] .lesson-feedback { color: #dbe7f6; background: #29384c; }
:root[data-theme="dark"] .block-image-empty { background: #202d3e; }

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(180deg, var(--surface) 0%, var(--bg) 42%),
    var(--bg);
  font-family: Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible { outline: 3px solid #ffbd38; outline-offset: 3px; }

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
}

.topbar {
  height: 76px;
  display: grid;
  grid-template-columns: minmax(190px, 260px) minmax(180px, 360px) auto 1fr;
  gap: 18px;
  align-items: center;
  padding: 12px 24px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color:inherit;
  text-decoration:none;
  border-radius:10px;
}

.brand:hover h1,.brand:focus-visible h1 { color:var(--blue); }

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: contain;
}

.brand-kicker,
.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 20px;
  line-height: 1.1;
}

h2 {
  margin-bottom: 0;
  font-size: 17px;
}

.project-name {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.project-name input {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--ink);
  background: var(--surface);
}

.top-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.extension-topbar-mount {
  min-width: 0;
}

.icon-button {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--surface);
  font-size: 18px;
  font-weight: 800;
}

.icon-button.primary {
  border-color: var(--green);
  color: #fff;
  background: var(--green);
}

.learning-toggle {
  height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 11px;
  color: var(--muted);
  background: var(--surface);
  font-size: 13px;
  font-weight: 800;
}

.learning-toggle.active {
  border-color: var(--blue);
  color: #fff;
  background: var(--blue);
}

.file-menu {
  position: relative;
}

.file-menu-toggle {
  height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--blue);
  border-radius: 8px;
  padding: 0 13px;
  color: #fff;
  background: var(--blue);
  font-weight: 800;
}

.file-menu-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linejoin: round;
  stroke-width: 2;
}

.file-menu-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 40;
  width: 180px;
  display: grid;
  gap: 4px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity 120ms ease, transform 120ms ease;
}

.file-menu.open .file-menu-panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.file-menu-panel button {
  border: 0;
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--ink);
  background: transparent;
  text-align: left;
  font-weight: 700;
}

.file-menu-panel button:hover {
  background: var(--surface-hover);
}

.workspace {
  min-height: 0;
  padding: 16px;
}

.editor-panel,
.split-workbench {
  min-width: 0;
}

.split-workbench.has-game-panel {
  grid-template-columns: minmax(280px, 1fr) minmax(280px, 1fr);
  grid-template-rows: clamp(260px, calc((100vw - 80px) * 0.32), 460px) minmax(180px, .7fr) minmax(360px, 1.3fr);
}

.split-workbench.has-game-panel [data-slot="left"] {
  grid-row: 1 / 4;
}

.split-workbench.has-game-panel [data-slot="game"] {
  grid-column: 2;
  grid-row: 1;
}

.split-workbench.has-game-panel [data-slot="right-top"] {
  grid-column: 2;
  grid-row: 2;
}

.split-workbench.has-game-panel [data-slot="right-bottom"] {
  grid-column: 2;
  grid-row: 3;
}

.editor-panel,
.output-panel,
.extension-panel,
.tutorial-panel {
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 8px 26px rgba(30, 36, 48, 0.06);
}

.panel-header,
.output-header,
.extension-panel-header,
.tutorial-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.split-workbench {
  min-height: calc(100vh - 108px);
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(280px, 1fr);
  grid-template-rows: minmax(220px, .72fr) minmax(390px, 1.28fr);
  gap: 16px;
  align-items: stretch;
  position: relative;
}

.split-workbench [data-slot="left"] {
  grid-row: 1 / 3;
}

.split-workbench [data-slot="right-top"] {
  grid-column: 2;
  grid-row: 1;
}

.split-workbench [data-slot="right-bottom"] {
  grid-column: 2;
  grid-row: 2;
}

.split-workbench.learning-mode-off {
  grid-template-rows: minmax(560px, 1fr);
}

.split-workbench.learning-mode-off [data-slot="left"] {
  grid-row: 1;
}

.split-workbench.learning-mode-off [data-slot="right-top"] {
  grid-column: 2;
  grid-row: 1;
}

.split-workbench.learning-mode-off .tutorial-pane-slot {
  display: none;
}

.split-workbench.has-game-panel.learning-mode-off {
  grid-template-rows: clamp(260px, calc((100vw - 80px) * 0.375), 520px) minmax(180px, 1fr);
}

.split-workbench.has-game-panel.learning-mode-off [data-slot="left"] {
  grid-row: 1 / 3;
}

.split-workbench.has-game-panel.learning-mode-off [data-slot="right-top"] {
  grid-row: 2;
}

.pane-slot {
  min-width: 0;
  min-height: 0;
  padding: 8px;
  border-radius: 8px;
  background: var(--slot);
  transition: background 160ms ease, box-shadow 160ms ease;
}

.pane-slot.drop-target {
  background: #c9d8f6;
  box-shadow: inset 0 0 0 2px rgba(47, 115, 255, 0.42);
}

.movable-pane {
  width: 100%;
  height: 100%;
  min-height: 0;
  border: 1px solid var(--line);
  transition: box-shadow 160ms ease;
}

.movable-pane.shifting {
  transition: transform 90ms ease-out;
  will-change: transform;
}

.movable-pane.dragging {
  position: fixed;
  z-index: 50;
  pointer-events: none;
  opacity: 0.94;
  transform: scale(1.015);
  box-shadow: var(--shadow);
  transition: none;
}

.editor-panel {
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
}

.split-workbench .editor-panel {
  min-height: 0;
}

.panel-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.panel-header.compact {
  padding: 12px 14px;
}

.editor-tools {
  display: flex;
  gap: 8px;
}

.editor-tools button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--muted);
  background: var(--surface);
  font-size: 13px;
  font-weight: 700;
}

.code-wrap {
  position: relative;
  height: 100%;
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-columns: 48px 1fr;
  overflow: hidden;
  background: var(--editor);
}

.line-numbers,
#codeEditor,
.syntax-highlight {
  margin: 0;
  padding: 16px 0;
  border: 0;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: var(--editor-font-size, 12px);
  line-height: 1.4;
}

.line-numbers {
  position: absolute;
  inset: 0 auto 0 0;
  width: 48px;
  min-height: 0;
  overflow: hidden;
  color: #73809a;
  background: var(--editor-gutter);
  text-align: right;
  user-select: none;
  padding-right: 12px;
}

.code-editor-stack {
  grid-column: 2;
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

#codeEditor {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  resize: none;
  overflow: scroll;
  outline: none;
  color: transparent;
  -webkit-text-fill-color: transparent;
  background: transparent;
  caret-color: var(--green);
  padding-left: 14px;
  white-space: pre;
}

#codeEditor::selection {
  background: rgba(76, 151, 255, 0.42);
}

.syntax-highlight {
  position: absolute;
  inset: 0;
  overflow: hidden;
  color: var(--editor-ink);
  background: transparent;
  padding-left: 14px;
  white-space: pre;
  pointer-events: none;
}

.syntax-control { color: #FFAB19; }
.syntax-variable { color: #FF8C1A; }
.syntax-list { color: #FF661A; }
.syntax-operator { color: #59C059; }
.syntax-custom { color: #FF6680; }
.syntax-extension { color: #9966FF; }
.syntax-motion { color: #4C97FF; }
.syntax-looks { color: #9966FF; }
.syntax-sound { color: #CF63CF; }
.syntax-events { color: #FFBF00; }
.syntax-sensing { color: #5CB1D6; }

.extension-mode-screen {
  min-height: calc(100vh - 108px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 8px 26px rgba(30, 36, 48, 0.06);
  overflow: hidden;
}

.extension-mode-content {
  height: 100%;
}

.workspace.mode-screen-active .split-workbench {
  display: none;
}

.output-panel,
.extension-panel,
.tutorial-panel {
  min-height: 0;
  overflow: hidden;
}

.run-status {
  border-radius: 999px;
  padding: 5px 10px;
  color: #fff;
  background: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.run-status.running {
  background: var(--green);
}

.run-status.saved {
  background: var(--blue);
}

.output-panel {
  display: grid;
  grid-template-rows: auto 1fr;
}

.output-header,
.extension-panel-header,
.tutorial-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.tutorial-panel {
  display: grid;
  grid-template-rows: auto auto 1fr;
  background: var(--surface);
}

.tutorial-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.tutorial-progress {
  min-width: 44px;
  border-radius: 999px;
  padding: 6px 10px;
  color: #1d4ed8;
  background: #dbeafe;
  text-align: center;
  font-size: 12px;
  font-weight: 900;
}

.tutorial-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 8px 12px 0;
  background: #f8fafc;
}

.tutorial-tab {
  border: 0;
  border-bottom: 3px solid transparent;
  padding: 10px;
  color: var(--muted);
  background: transparent;
  font-weight: 800;
}

.tutorial-tab.active {
  border-bottom-color: var(--blue);
  color: var(--blue);
}

.tutorial-body {
  min-height: 0;
  padding: 14px;
  overflow: auto;
  background: #f8fafc;
}

.lesson-picker {
  display: flex;
  gap: 8px;
  padding-bottom: 12px;
  overflow-x: auto;
}

.lesson-chip {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--muted);
  background: var(--surface);
  font-size: 12px;
  font-weight: 800;
}

.lesson-chip span {
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: #94a3b8;
}

.lesson-chip.active {
  border-color: #93c5fd;
  color: #1d4ed8;
  background: #eff6ff;
}

.lesson-chip.active span { background: var(--blue); }
.lesson-chip.done span { background: var(--green); }

.lesson-card,
.reference-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  background: var(--surface);
}

.lesson-card h3,
.reference-card h3 { margin: 8px 0 12px; }

.lesson-step {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
}

.lesson-step span {
  border-radius: 5px;
  padding: 3px 6px;
  color: #fff;
  background: var(--blue);
  font-weight: 900;
}

.exercise-step {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

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

.comparison-label,
.platform-badge,
.reference-category {
  display: inline-flex;
  border-radius: 999px;
  padding: 4px 8px;
  color: #fff;
  background: #334155;
  font-size: 11px;
  font-weight: 900;
}

.platform-Scratch標準 { background: #855cd6; }
.platform-TurboWarp標準 { background: #ff4c4c; }
.platform-TurboWarp拡張 { background: #0f9d9a; }
.platform-対応なし { background: #64748b; }

.lesson-card pre,
.reference-card pre {
  margin: 8px 0;
  border-radius: 7px;
  padding: 10px;
  overflow: auto;
  color: #e2e8f0;
  background: #111827;
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.copy-code,
.next-lesson {
  border: 0;
  border-radius: 7px;
  padding: 8px 11px;
  color: #fff;
  background: var(--blue);
  font-weight: 800;
}

.block-image-wrap,
.block-image-empty {
  min-height: 82px;
  margin-top: 8px;
  border: 1px dashed #cbd5e1;
  border-radius: 8px;
  padding: 8px;
  background: #f8fafc;
}

.block-image-wrap { position: relative; display: grid; place-items: center; }
.block-image-gallery { position: relative; z-index: 1; width: 100%; display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; }
.block-image-wrap img { max-width: 100%; max-height: 165px; object-fit: contain; }
.block-image-fallback { display: none; color: #fff; background: #855cd6; border-radius: 7px; padding: 10px 14px; text-align: center; font-weight: 800; }
.block-image-fallback small { display: block; margin-top: 4px; opacity: .78; }
.block-image-wrap.missing-image .block-image-fallback { display: block; }
.block-image-empty { display: grid; place-items: center; color: var(--muted); text-align: center; font-size: 12px; }

.comparison-note,
.lesson-task,
.lesson-hint,
.reference-card p { color: var(--muted); font-size: 13px; line-height: 1.65; }
.lesson-task { color: var(--ink); font-weight: 800; }
.lesson-hint { border-radius: 7px; padding: 9px; background: #fff7ed; }
.lesson-extension-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  border: 1px solid #c7d2fe;
  border-radius: 8px;
  padding: 10px;
  background: #eef2ff;
}
.lesson-extension-action div { display: grid; gap: 3px; }
.lesson-extension-action span { color: var(--muted); font-size: 12px; }
.lesson-extension-action button { border: 0; border-radius: 7px; padding: 8px 11px; color: #fff; background: #6366f1; font-weight: 800; }
.lesson-extension-action button:disabled { color: #166534; background: #dcfce7; cursor: default; }
:root[data-theme="dark"] .lesson-extension-action { border-color: #475569; background: #25324a; }
.lesson-feedback { border-radius: 8px; padding: 10px; color: #475569; background: #e2e8f0; font-size: 13px; }
.lesson-feedback.success { color: #166534; background: #dcfce7; }
.lesson-feedback.error { color: #b91c1c; background: #fee2e2; }
.next-lesson { width: 100%; margin-top: 10px; background: var(--green); }
.reset-progress { display: block; margin: 12px auto 0; border: 0; color: var(--muted); background: transparent; text-decoration: underline; }

.reference-filters { display: grid; grid-template-columns: 1fr 140px 160px; gap: 8px; }
.reference-filters label { display: grid; gap: 4px; color: var(--muted); font-size: 11px; font-weight: 800; }
.reference-filters input,
.reference-filters select { min-width: 0; border: 1px solid var(--line); border-radius: 7px; padding: 8px; color: var(--ink); background: var(--surface); }
.reference-count { color: var(--muted); font-size: 12px; }
.reference-list { display: grid; gap: 10px; }
.reference-title { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.reference-category { color: #475569; background: #e2e8f0; }
.reference-card a { color: var(--blue); font-size: 12px; font-weight: 700; }
.extension-name { margin: 6px 0; font-weight: 800; }

.extension-panel {
  display: grid;
  grid-template-rows: auto 1fr;
}

.pane-drag-handle {
  cursor: grab;
  user-select: none;
}

.pane-drag-handle:active,
.movable-pane.dragging .pane-drag-handle {
  cursor: grabbing;
}

.workspace.dragging-pane textarea,
.workspace.dragging-pane button,
.workspace.dragging-pane input {
  pointer-events: none;
}

#outputLog {
  height: 100%;
  min-height: 168px;
  margin: 0;
  padding: 14px;
  overflow: auto;
  color: #17324d;
  background: #f9fbfe;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.extension-panel-view,
.extension-mode-content {
  min-height: 0;
  background: #eef2f7;
  overflow: hidden;
}

.game-pane-slot .extension-panel-view {
  background: var(--surface);
}

.extension-panel-view:empty,
.extension-mode-mount:empty,
.extension-topbar-mount:empty {
  display: none;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(17, 24, 39, 0.42);
}

.extension-modal {
  width: min(620px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.extension-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  padding: 16px;
}

.extension-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.extension-form input {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--ink);
  background: var(--surface);
}

.extension-form button {
  align-self: end;
  height: 42px;
  border: 0;
  border-radius: 8px;
  padding: 0 16px;
  color: #fff;
  background: var(--blue);
  font-weight: 800;
}

.extension-status {
  margin: 0;
  padding: 0 16px 14px;
  color: var(--muted);
  font-size: 13px;
}

.extension-list {
  display: grid;
  gap: 8px;
  padding: 0 16px 16px;
}

.extension-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--surface-soft);
}

.extension-item strong {
  display: block;
  font-size: 14px;
}

.extension-item span {
  color: var(--muted);
  font-size: 12px;
}

.extension-remove-button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 10px;
  color: var(--ink);
  background: var(--surface);
  font-weight: 800;
}

.settings-modal { width: min(520px, 100%); }
.settings-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; padding: 18px; }
.settings-form label { display: grid; gap: 7px; color: var(--muted); font-size: 12px; font-weight: 800; }
.settings-form select { width: 100%; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; color: var(--ink); background: var(--surface); }
.settings-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 0 18px 18px; }
.settings-footer p { margin: 0; color: var(--muted); font-size: 12px; }
.settings-footer button { border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; color: var(--ink); background: var(--surface); font-weight: 800; }

@media (max-width: 560px) {
  .settings-form { grid-template-columns: 1fr; }
  .settings-footer { align-items: stretch; flex-direction: column; }
}

@media (max-width: 1120px) {
  .topbar {
    grid-template-columns: 1fr auto;
    height: auto;
  }

  .project-name,
  .extension-topbar-mount {
    grid-row: 2;
  }

  .workspace {
    padding: 14px;
  }

  .split-workbench {
    grid-template-columns: minmax(260px, 1fr) minmax(260px, 1fr);
  }
}

@media (max-width: 760px) {
  .topbar,
  .workspace {
    display: flex;
    flex-direction: column;
  }

  .topbar {
    align-items: stretch;
    padding: 12px;
  }

  .brand,
  .top-actions {
    justify-content: space-between;
  }

  .workspace {
    padding: 12px;
  }

  .editor-panel {
    min-height: 560px;
  }

  .split-workbench {
    display: grid;
    min-height: auto;
    grid-template-columns: 1fr;
    grid-template-rows: 560px 280px minmax(520px, auto);
  }

  .split-workbench [data-slot="left"],
  .split-workbench [data-slot="right-top"],
  .split-workbench [data-slot="right-bottom"] {
    grid-column: auto;
    grid-row: auto;
  }

  .split-workbench.learning-mode-off {
    grid-template-rows: 560px 280px;
  }

  .split-workbench.has-game-panel.learning-mode-off {
    grid-template-rows: 560px 320px 240px;
  }

  .split-workbench.has-game-panel.learning-mode-off [data-slot="left"],
  .split-workbench.has-game-panel.learning-mode-off [data-slot="right-top"] {
    grid-row: auto;
  }

  .split-workbench.has-game-panel {
    grid-template-columns: 1fr;
    grid-template-rows: 560px 320px 240px minmax(520px, auto);
  }

  .split-workbench.has-game-panel [data-slot="left"],
  .split-workbench.has-game-panel [data-slot="game"],
  .split-workbench.has-game-panel [data-slot="right-top"] {
    grid-column: auto;
    grid-row: auto;
  }

  .pane-slot {
    padding: 6px;
  }

  .extension-form {
    grid-template-columns: 1fr;
  }

  .comparison-grid,
  .reference-filters { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}