/* Stack: vertical flow with consistent spacing */
.stack {
  display: flex;
  flex-direction: column;
}

.stack > * + * {
  margin-top: var(--space, var(--space-s));
}

.stack[data-space="l"] { --space: var(--space-l); }
.stack[data-space="xl"] { --space: var(--space-xl); }
.stack[data-space="m"] { --space: var(--space-m); }
.stack[data-space="s"] { --space: var(--space-s); }
.stack[data-space="xs"] { --space: var(--space-xs); }

/* Cluster: horizontal flex wrap */
.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space, var(--space-s));
  align-items: center;
}

.cluster[data-space="3xs"] { --space: var(--space-3xs); }
.cluster[data-space="2xs"] { --space: var(--space-2xs); }
.cluster[data-space="xs"] { --space: var(--space-xs); }
.cluster[data-space="s"] { --space: var(--space-s); }
.cluster[data-space="m"] { --space: var(--space-m); }

.cluster[data-align="center"] { align-items: center; }

.cluster[data-justify="space-between"] {
  justify-content: space-between;
}

.cluster[data-justify="center"] {
  justify-content: center;
}

.cluster[data-justify="end"] {
  justify-content: flex-end;
}

/* Sidebar: sidebar + main content */
.sidebar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space, var(--space-m));
}

.sidebar > :first-child {
  flex-basis: var(--sidebar-width);
  flex-grow: 1;
}

.sidebar > :last-child {
  flex-basis: 0;
  flex-grow: 999;
  min-width: 50%;
}

/* Grid: auto-fit responsive */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(var(--grid-min, 16rem), 100%), 1fr));
  gap: var(--space, var(--space-m));
}

/* Center: constrained max-width */
.center {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-m);
}

/* Workspace split-pane: fixed two-column grid filling available height */
.workspace-layout {
  display: grid;
  grid-template-columns: 15rem 1fr;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

/* Workspace panel: flex column, scrollable messages area fills remaining space */
.workspace-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

#workspace-container {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* App layout: sidenav + main */
.app-layout {
  display: grid;
  grid-template-columns: var(--sidenav-width-collapsed) 1fr;
  min-height: 100vh;
  transition: grid-template-columns 0.2s ease;
}

.app-layout[data-expanded] {
  grid-template-columns: var(--sidenav-width) 1fr;
}

.app-main {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--color-surface);
}

/* Cover: min-height full viewport */
.cover {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.cover > main {
  flex: 1;
}