:root {
  --bg: #0e1116;
  --panel: #151920;
  --tool: #10141a;
  --tool-elev: #171c24;
  --text: #e6e9ee;
  --muted: #8b939e;
  --accent: #4f9fd4;
  --accent-soft: rgba(79, 159, 212, 0.16);
  --accent-line: rgba(79, 159, 212, 0.55);
  --line: #262d38;
  --line-soft: #1c222b;
  --ok: #3d9a6a;
  --warn: #c9a227;
  --danger: #c45c5c;
  --rail: 52px;
  --topbar: 42px;
  --subbar: 34px;
  --chrome: calc(var(--topbar) + var(--subbar));
  --sidebar: 300px;
  --radius: 8px;
  --font: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; height: 100%; background: var(--bg); color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
#app {
  display: grid;
  grid-template-rows: var(--chrome) 1fr;
  height: 100%;
  min-height: 0;
}
#chrome {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 30;
  border-bottom: 1px solid var(--line);
  background: #141920;
}
#workspace {
  display: grid;
  grid-template-columns: var(--rail) 1fr var(--sidebar);
  min-height: 0;
  height: 100%;
  overflow: hidden;
  transition: grid-template-columns 0.2s ease;
}
#workspace.tools-collapsed {
  grid-template-columns: 0 1fr var(--sidebar);
}
#workspace.sidebar-collapsed {
  grid-template-columns: var(--rail) 1fr 0;
}
#workspace.tools-collapsed.sidebar-collapsed {
  grid-template-columns: 0 1fr 0;
}

/* ——— Top application bar ——— */
#topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px 0 10px;
  height: var(--topbar);
  background: linear-gradient(180deg, #1a2029 0%, #151b24 100%);
  flex-shrink: 0;
}
#subbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px 0 10px;
  height: var(--subbar);
  background: #12171f;
  border-top: 1px solid var(--line-soft);
  flex-shrink: 0;
}
.topbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: 6px;
  flex-shrink: 0;
}
.topbar-mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #d7eefc;
  background: linear-gradient(145deg, #2a4558 0%, #1a2a38 100%);
  border: 1px solid #3a5a72;
}
.topbar-titles {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.topbar-titles strong {
  font-size: 12px;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.topbar-titles span {
  font-size: 10px;
  color: var(--muted);
}
.topbar-group {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 0 6px;
  border-left: 1px solid var(--line-soft);
  flex-shrink: 0;
}
.topbar-group:first-of-type,
.topbar-brand + .topbar-group {
  border-left: 0;
  padding-left: 0;
}
.topbar-group button,
.menu-trigger {
  border: 1px solid transparent;
  background: transparent;
  color: #b8c0ca;
  padding: 5px 8px;
  font: inherit;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 5px;
  white-space: nowrap;
  transition: background 0.1s ease, color 0.1s ease, border-color 0.1s ease;
}
.topbar-group button:hover,
.menu-trigger:hover {
  background: var(--tool-elev);
  color: var(--text);
  border-color: var(--line);
}
.topbar-group button.mode.active,
.topbar-group button.ctrl.on,
.menu.open > .menu-trigger {
  background: var(--accent-soft);
  color: #9ad0ef;
  border-color: var(--accent-line);
}
.topbar-group button.danger-btn {
  color: #e8a0a0;
}
.topbar-group button.danger-btn:hover {
  background: #2a1c1c;
  border-color: #5a3030;
}

/* Dropdown menus */
.menu {
  position: relative;
  display: inline-flex;
}
.menu-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.menu-trigger::after {
  content: "";
  width: 0; height: 0;
  border-left: 3.5px solid transparent;
  border-right: 3.5px solid transparent;
  border-top: 4px solid currentColor;
  opacity: 0.7;
  margin-top: 1px;
}
.menu-panel {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 168px;
  padding: 4px;
  background: #1a2029;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
  z-index: 80;
  display: none;
  flex-direction: column;
  gap: 1px;
}
.menu.open > .menu-panel { display: flex; }
.menu-panel button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 7px 10px;
  font: inherit;
  font-size: 12px;
  border-radius: 5px;
  cursor: pointer;
}
.menu-panel button:hover { background: #252c38; }
.menu-panel button.danger-btn { color: #e8a0a0; }
.menu-panel button.danger-btn:hover { background: #2a1c1c; }
.menu-panel .menu-kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted);
}
.menu-panel .menu-sep {
  height: 1px;
  background: var(--line);
  margin: 4px 6px;
}
.menu-panel .menu-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 6px 10px 8px;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.menu-panel .menu-field input {
  background: #12161d;
  border: 1px solid var(--line);
  color: var(--text);
  font: inherit;
  font-size: 12px;
  text-transform: none;
  letter-spacing: 0;
  padding: 5px 8px;
  border-radius: 5px;
}

.subbar-label {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-right: 2px;
  flex-shrink: 0;
}
.subbar-selects {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
}
.subbar-selects select,
.subbar-selects input {
  background: #0e1218;
  border: 1px solid var(--line);
  color: var(--text);
  font: inherit;
  font-size: 11px;
  padding: 3px 7px;
  border-radius: 5px;
  min-width: 0;
}
.subbar-selects select#modelSelect { flex: 1; max-width: 220px; }
.subbar-selects select#versionSelect { width: 140px; max-width: 28vw; }
.subbar-selects .models-user {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}
.subbar-selects .models-user input { width: 72px; }

.models-group {
  gap: 5px;
  max-width: none;
}
.models-group select,
.models-user input {
  background: #12161d;
  border: 1px solid var(--line);
  color: var(--text);
  font: inherit;
  font-size: 11px;
  padding: 4px 7px;
  border-radius: 5px;
  max-width: 150px;
}
.models-group select#versionSelect { max-width: 128px; }
.models-user {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.03em;
}
.models-user input {
  width: 70px;
  max-width: 70px;
}
.topbar-spacer { flex: 1; min-width: 8px; }
.topbar-preview {
  color: #9ad0ef;
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid #2a4558;
  background: #152028;
  white-space: nowrap;
}
.topbar-preview:hover {
  background: #1a3040;
  border-color: #3a5a72;
}

/* ——— Toolbar rail (Photoshop-style compact icons) ——— */
#tools {
  background:
    linear-gradient(180deg, #141920 0%, var(--tool) 28%, var(--tool) 100%);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 6px 5px 10px;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: #2a3340 transparent;
  position: relative;
  z-index: 5;
  min-height: 0;
  height: 100%;
  transition: opacity 0.15s ease;
}
#tools::-webkit-scrollbar { width: 3px; }
#tools::-webkit-scrollbar-thumb { background: #2a3340; border-radius: 4px; }

.tools-brand {
  display: none;
}
.tools-brand-mark {
  display: none;
}

.tool-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 6px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line-soft);
}
.tool-group:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}
.tool-group-label {
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #4a5360;
  padding: 0 2px 1px;
  user-select: none;
  text-align: center;
  overflow: hidden;
  text-overflow: clip;
}
.tool-group-btns {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tool-btn {
  position: relative;
  width: 100%;
  height: 34px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: #b8c0ca;
  font: inherit;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}
.tool-btn .tool-icon {
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  line-height: 0;
}
.tool-btn .tool-icon svg {
  width: 17px;
  height: 17px;
  display: block;
}
.tool-btn .tool-name,
.tool-btn .tool-key {
  display: none;
}
.tool-btn:hover {
  background: var(--tool-elev);
  color: var(--text);
  border-color: var(--line);
}
.tool-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.tool-btn.active {
  background: var(--accent-soft);
  color: #9ad0ef;
  border-color: var(--accent-line);
  box-shadow:
    inset 3px 0 0 var(--accent),
    0 0 0 1px rgba(79, 159, 212, 0.08);
}
.tool-btn.active:hover {
  background: rgba(79, 159, 212, 0.22);
  color: #c5e6f8;
}
#tools.operate-mode .tool-btn {
  opacity: 0.45;
  pointer-events: none;
}
#tools.operate-mode .tool-btn[data-tool="select"] {
  opacity: 1;
  pointer-events: auto;
}

/* Flyout tooltip */
.tool-flyout {
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
  min-width: 148px;
  max-width: 220px;
  padding: 8px 10px;
  border-radius: 8px;
  background: #1a212c;
  border: 1px solid #334050;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
  color: var(--text);
  text-align: left;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.12s ease, transform 0.12s ease, visibility 0.12s;
  z-index: 40;
}
.tool-flyout strong {
  display: block;
  font-size: 12px;
  font-weight: 650;
  margin-bottom: 2px;
}
.tool-flyout span {
  display: block;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.35;
}
.tool-flyout kbd {
  display: inline-block;
  margin-top: 6px;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #3a4554;
  background: #0f141c;
  color: #9ad0ef;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
}
.tool-btn:hover .tool-flyout,
.tool-btn:focus-visible .tool-flyout {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}
.tool-flyout::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 50%;
  width: 8px;
  height: 8px;
  background: #1a212c;
  border-left: 1px solid #334050;
  border-bottom: 1px solid #334050;
  transform: translateY(-50%) rotate(45deg);
}

#stage {
  position: relative; min-width: 0; min-height: 0; height: 100%;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background:
    radial-gradient(circle at 1px 1px, #1c222c 1px, transparent 0) 0 0 / 24px 24px,
    var(--bg);
  overflow: hidden;
}
#banner {
  background: #3a2f12; color: #f0e0a0; padding: 8px 12px; font-size: 13px;
  border-bottom: 1px solid var(--warn);
}
#banner.hidden { display: none; }
#svgWrap { min-height: 0; touch-action: none; cursor: crosshair; overflow: hidden; }
#svgWrap.pan, #svgWrap.panning { cursor: grab; }
#svgWrap.panning { cursor: grabbing; }
svg { width: 100%; height: 100%; display: block; }
#statusbar {
  display: flex; gap: 14px; flex-wrap: wrap; align-items: center;
  padding: 7px 14px; font-size: 12px; color: var(--muted);
  border-top: 1px solid var(--line); background: rgba(16, 20, 26, 0.96);
  font-variant-numeric: tabular-nums;
}
#statusbar #statTool {
  color: #9ad0ef;
  font-weight: 600;
  min-width: 7em;
}
#statusbar #statCursor {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #a8b0ba;
}
#statusbar span:last-child { color: var(--text); margin-left: auto; }

/* ——— Sidebar: fixed head + scroll body ——— */
aside#sidebar {
  border-left: 1px solid var(--line);
  background: var(--panel);
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  position: relative;
  transition: opacity 0.15s ease;
}
#workspace.sidebar-collapsed aside#sidebar {
  opacity: 0;
  pointer-events: none;
  border-left: 0;
}
.sidebar-head {
  flex-shrink: 0;
  padding: 12px 14px 10px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #181e27 0%, var(--panel) 100%);
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}
.sidebar-head-text { min-width: 0; }
.panel-collapse-btn {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  background: #1a2029;
  color: var(--muted);
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  line-height: 1;
  display: grid;
  place-items: center;
  padding: 0;
}
.panel-collapse-btn:hover {
  color: var(--text);
  background: #222831;
  border-color: #3a4554;
}

/* Edge tabs when a panel is collapsed */
.panel-edge-tab {
  position: absolute;
  z-index: 25;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  min-height: 72px;
  padding: 8px 0;
  border: 1px solid var(--line);
  background: #1a2029;
  color: var(--muted);
  font: inherit;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}
.panel-edge-tab:hover {
  color: #9ad0ef;
  background: #1e2834;
  border-color: #3a5a72;
}
#toolsEdgeTab {
  left: 0;
  border-radius: 0 8px 8px 0;
  border-left: 0;
}
#sidebarEdgeTab {
  right: 0;
  border-radius: 8px 0 0 8px;
  border-right: 0;
  writing-mode: vertical-lr;
}
#workspace.tools-collapsed #toolsEdgeTab { display: flex; }
#workspace.sidebar-collapsed #sidebarEdgeTab { display: flex; }

#workspace.tools-collapsed #tools {
  opacity: 0;
  pointer-events: none;
  border-right: 0;
  overflow: hidden;
  min-width: 0;
  padding: 0;
}
#workspace.sidebar-collapsed aside#sidebar {
  min-width: 0;
  overflow: hidden;
}
.tools-collapse-wrap {
  display: flex;
  justify-content: center;
  padding: 4px 0 2px;
  flex-shrink: 0;
}
.tools-collapse-wrap .panel-collapse-btn {
  width: 100%;
  max-width: 40px;
  height: 24px;
  font-size: 12px;
}
.sidebar-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 14px 18px;
  scrollbar-width: thin;
  scrollbar-color: #2a3340 transparent;
}
.sidebar-body::-webkit-scrollbar { width: 5px; }
.sidebar-body::-webkit-scrollbar-thumb { background: #2a3340; border-radius: 4px; }

aside h1 {
  margin: 0 0 2px; font-size: 14px; font-weight: 650;
  letter-spacing: -0.01em;
}
aside .sub { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.4; }
aside h2 {
  margin: 14px 0 8px; font-size: 10px; text-transform: uppercase;
  letter-spacing: .08em; color: #6a7380; font-weight: 650;
}
.actions { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.actions button, .sel-actions button, button.ctrl {
  border: 1px solid var(--line); background: #1c222c; color: var(--text);
  padding: 7px 10px; font: inherit; font-size: 12px; cursor: pointer;
  border-radius: 6px;
  transition: background 0.12s ease, border-color 0.12s ease;
}
.actions button:hover, .sel-actions button:hover, button.ctrl:hover {
  border-color: #3a4554;
  background: #232a35;
}
.actions button.mode.active, button.ctrl.on {
  background: var(--accent); color: #0b1220; border-color: var(--accent);
}
.row {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 7px 0; border-bottom: 1px solid var(--line); font-size: 13px;
}
.row.sel { background: #1c2633; margin: 0 -6px; padding-left: 6px; padding-right: 6px; border-radius: 4px; }
.hint { margin-top: 12px; color: var(--muted); font-size: 11px; line-height: 1.5; }
.sel-box {
  border: 1px solid var(--line); padding: 10px; margin-top: 0; margin-bottom: 10px;
  background: #10141a; border-radius: 8px;
}
#inspector { min-height: 80px; }
aside h2:first-of-type { margin-top: 4px; }
.sel-box strong { display: block; margin-bottom: 8px; }
.sel-box .size-badge {
  margin: 0 0 8px;
  padding: 8px 10px;
  background: #1c2a3a;
  border: 1px solid #3a5a78;
  color: #9ad0ef;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.02em;
  border-radius: 6px;
}
.sel-box label { display: block; font-size: 12px; color: var(--muted); margin: 8px 0 4px; }
.sel-box input, .sel-box select {
  width: 100%; background: #0c0f14; border: 1px solid var(--line);
  color: var(--text); padding: 6px 8px; font: inherit; font-size: 13px;
  border-radius: 6px;
}
.sel-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.sel-actions button.on {
  background: #2a4a62;
  border-color: #4f9fd4;
  color: #dceef8;
}
.furn-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0 0 10px;
  max-height: min(42vh, 360px);
  overflow: auto;
  padding-right: 2px;
  scrollbar-width: thin;
}
.furn-cat-label {
  display: block;
  font-size: 9px;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6a7380;
  margin-bottom: 4px;
}
.furn-cat-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
button.furn-preset {
  border: 1px solid var(--line);
  background: #1c222c;
  color: var(--text);
  padding: 5px 8px;
  font: inherit;
  font-size: 11px;
  cursor: pointer;
  border-radius: 6px;
}
button.furn-preset:hover {
  border-color: #3a4554;
  background: #232a35;
}
button.furn-preset.on {
  background: #2a4a62;
  border-color: #4f9fd4;
  color: #dceef8;
}
.color-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 8px;
}
button.color-swatch {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  border: 2px solid #1a1e26;
  padding: 0;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.12);
}
button.color-swatch:hover {
  transform: scale(1.08);
}
button.color-swatch.on {
  border-color: #4f9fd4;
  box-shadow: 0 0 0 1px #4f9fd4;
}
input[type="color"] {
  width: 100%;
  height: 32px;
  border: 1px solid var(--line);
  background: #1c222c;
  border-radius: 6px;
  padding: 2px;
  cursor: pointer;
  margin-bottom: 8px;
}
a.preview {
  display: inline-flex; align-items: center; gap: 4px;
  margin: 10px 0 6px; color: var(--accent); font-size: 13px; text-decoration: none;
}
a.preview:hover { text-decoration: underline; }
.layer-row {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  gap: 6px;
  align-items: center;
  padding: 8px 6px;
  border: 1px solid var(--line);
  margin-bottom: 6px;
  background: #10141a;
  font-size: 12px;
  border-radius: 6px;
}
.layer-row.active { border-color: var(--accent); }
.layer-row .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: pointer; }
.layer-row .ops { display: flex; gap: 4px; }
.layer-row button.mini {
  border: 1px solid var(--line); background: #1c222c; color: var(--text);
  padding: 2px 6px; font: inherit; font-size: 11px; cursor: pointer; min-width: 24px;
  border-radius: 4px;
}
.layer-row button.mini.on { color: var(--accent); border-color: var(--accent); }
.layer-row input[type="range"] { width: 100%; grid-column: 1 / -1; accent-color: var(--accent); }
.range-row { display: flex; align-items: center; gap: 8px; }
.range-row input[type="range"] { flex: 1; accent-color: var(--accent); }
.range-row span { min-width: 36px; text-align: right; font-size: 12px; color: var(--muted); }
#toasts {
  position: absolute;
  left: 50%;
  bottom: 48px;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
  width: min(420px, calc(100% - 24px));
}
.toast {
  pointer-events: none;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: #1e2630;
  color: var(--text);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  animation: toast-in 0.22s ease-out, toast-out 0.28s ease-in 2.4s forwards;
  text-align: center;
  max-width: 100%;
}
.toast.ok {
  background: #1a2e24;
  border-color: #2f6b4a;
  color: #b8e0c8;
}
.toast.err {
  background: #2e1c1c;
  border-color: #7a3a3a;
  color: #f0c0c0;
}
@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-6px); }
}
@media (max-width: 900px) {
  #workspace {
    grid-template-columns: var(--rail) 1fr;
    grid-template-rows: 1fr min(42vh, 360px);
  }
  aside#sidebar {
    grid-column: 1 / -1;
    border-left: 0;
    border-top: 1px solid var(--line);
    height: auto;
  }
  .topbar-titles span { display: none; }
  .subbar-label { display: none; }
  .subbar-selects select#versionSelect { width: 110px; }
  .tool-flyout { display: none; }
  .tool-btn { height: 32px; }
}
@media (min-width: 1400px) {
  :root { --rail: 56px; }
}