/* Page layouts and composition primitives */
.app-shell {
  min-height: 100vh;
}

.app-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(0.75rem);
}

.app-header__inner {
  display: flex;
  width: min(100%, var(--content-width));
  min-height: 3.5rem;
  margin-inline: auto;
  padding-inline: var(--space-6);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.app-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 750;
  text-decoration: none;
}

.app-main {
  min-width: 0;
  padding: var(--space-8) var(--space-6);
}

.container {
  width: min(100%, var(--content-width));
  margin-inline: auto;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.page-header__description {
  max-width: 42rem;
  margin: var(--space-2) 0 0;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack-space, var(--space-4));
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--cluster-space, var(--space-3));
}

.split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.grid {
  display: grid;
  gap: var(--grid-space, var(--space-4));
  grid-template-columns: repeat(var(--grid-columns, 1), minmax(0, 1fr));
}

.sidebar-layout {
  display: grid;
  align-items: start;
  gap: var(--space-6);
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 22rem);
}

.divider {
  width: 100%;
  height: 1px;
  border: 0;
  background: var(--color-border);
}

@media (max-width: 56rem) {
  .app-header__inner {
    padding-inline: var(--space-4);
  }

  .app-main {
    padding: var(--space-6) var(--space-4);
  }

  .sidebar-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 40rem) {
  .page-header {
    align-items: stretch;
    flex-direction: column;
  }

  .page-header > .button {
    width: 100%;
  }
}