.scb-shell {
  display: grid;
  grid-template-columns: 280px minmax(720px, 1fr) 300px;
  min-height: calc(var(--scb-app-height) - 132px);
}

.scb-sidebar {
  background: rgba(255, 253, 247, 0.78);
  border-color: var(--scb-soft-border);
  border-style: solid;
  padding: 18px;
}

.scb-sidebar-left {
  border-width: 0 1px 0 0;
}

.scb-sidebar-right {
  border-width: 0 0 0 1px;
}

.scb-sidebar h3 {
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.04em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

.scb-side-button {
  display: block;
  margin-bottom: 10px;
  text-align: left;
  width: 100%;
}

.scb-sidebar-note {
  border: 1px dashed var(--scb-soft-border);
  border-radius: 12px;
  color: var(--scb-muted);
  font-size: 12px;
  line-height: 1.45;
  margin-top: 14px;
  padding: 12px;
}

.scb-workspace-wrap {
  align-items: center;
  display: flex;
  justify-content: center;
  min-height: 560px;
  overflow: auto;
  padding: 32px;
}

.scb-workspace {
  align-items: center;
  display: flex;
  justify-content: center;
  min-height: 100%;
  min-width: 100%;
}

.scb-page {
  position: relative;
  background: var(--scb-panel-bg);
  border: 3px solid var(--scb-border);
  box-shadow: 10px 10px 0 rgba(17, 24, 39, 0.16);
  overflow: hidden;
}

.scb-layout-book {
  aspect-ratio: 8.5 / 11;
  height: min(700px, 82vh);
  min-height: 560px;
}

.scb-layout-strip {
  aspect-ratio: 16 / 6;
  width: min(1120px, 100%);
  min-height: 360px;
}

.scb-property-card {
  border: 1px solid var(--scb-soft-border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.82);
  display: grid;
  gap: 5px;
  margin-bottom: 14px;
  padding: 12px;
}

.scb-property-card strong {
  font-size: 14px;
}

.scb-property-card span,
.scb-property-card small {
  color: var(--scb-muted);
}


/* Larger center canvas for full-width browser use */
.scb-workspace-wrap {
  background: rgba(255, 255, 255, 0.28);
}

.scb-sidebar-left,
.scb-sidebar-right {
  min-width: 0;
}

.scb-properties {
  max-width: 100%;
}


/* Collapsible left-sidebar library sections */
.scb-collapse-heading-row {
  align-items: center;
}

.scb-collapse-toggle {
  align-items: center;
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--scb-accent);
  cursor: pointer;
  display: flex;
  flex: 1;
  font-size: 14px;
  font-weight: 950;
  gap: 8px;
  justify-content: space-between;
  letter-spacing: 0.04em;
  margin: 0;
  padding: 0;
  text-align: left;
  text-transform: uppercase;
}

.scb-collapse-toggle:hover {
  color: #111827;
}

.scb-collapse-caret {
  color: #111827;
  font-size: 12px;
  transition: transform 0.15s ease;
}

.scb-collapsible-section.is-collapsed .scb-collapse-caret {
  transform: rotate(-90deg);
}

.scb-collapsible-section.is-collapsed .scb-collapse-body {
  display: none;
}