.layout {
  display: grid;
  grid-template-columns: 336px minmax(520px, 1fr) 380px;
  gap: 12px;
  min-height: 100vh;
  padding: 12px;
}

.sidebar {
  overflow-y: auto;
  min-height: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) transparent;
}

.sidebar::-webkit-scrollbar {
  width: 5px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
  transition: background var(--transition-fast);
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

.plot-area {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.plot-shell {
  position: relative;
  width: 100%;
  flex: 1;
  min-height: 0;
}

.plot-area.merged-plot-card {
  padding: 14px 16px 8px 16px;
}

.plot-shell {
  min-height: 720px;
  border-radius: 28px;
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}

#plot {
  width: 100%;
  height: 720px;
}

.mobile-sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 35;
  background: rgba(15, 23, 42, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-med);
}

.mobile-sidebar-backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}