/* Sidebar layouts */
.layout-sidebar {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: var(--spacing);
  min-height: 100vh;
}
.layout-sidebar > :first-child {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: var(--spacing);
}
/* Sidebar nav: vertical stacking + link styling */
.layout-sidebar nav,
.layout-sidebar-right nav {
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
}
.layout-sidebar nav ul,
.layout-sidebar-right nav ul {
  flex-direction: column;
  gap: 0.125em;
}
.layout-sidebar nav a,
.layout-sidebar-right nav a {
  display: flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.4em 0.75em;
  border-radius: var(--radius);
  color: var(--text-muted);
}
.layout-sidebar nav a:hover,
.layout-sidebar-right nav a:hover {
  background: var(--bg-surface);
  color: var(--text);
}
.layout-sidebar nav a.active,
.layout-sidebar-right nav a.active {
  background: var(--bg-surface);
  color: var(--accent);
  font-weight: 600;
}

.layout-sidebar-right {
  display: grid;
  grid-template-columns: 1fr 250px;
  gap: var(--spacing);
}

/* Full-height stack */
.layout-stack {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

/* Card grids */
.layout-cards-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing); }
.layout-cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing); }
.layout-cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing); }

/* Mobile collapse */
@media (max-width: 992px) {
  .layout-sidebar, .layout-sidebar-right,
  .layout-cards-2, .layout-cards-3, .layout-cards-4 {
    grid-template-columns: 1fr;
  }
  .layout-sidebar > :first-child {
    position: static; height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}