/* === App Shell === */
.app-shell {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  grid-template-areas: "content";
  min-height: 100vh;
  min-height: 100dvh;
  position: relative;
  z-index: 1;
}

/* === Content Area === */
.content {
  grid-area: content;
  overflow-y: auto;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

/* Full-screen mode (no sidebar) — default for this app */
.app-shell.no-sidebar {
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  grid-template-areas: "content";
}

.app-shell.no-sidebar .content {
  padding: 0;
  min-height: 100vh;
  min-height: 100dvh;
}

/* === Page Sections === */
.page {
  max-width: var(--max-content);
  margin: 0 auto;
}

.page-header {
  margin-bottom: var(--space-7);
}

.page-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-2);
}

.page-subtitle {
  font-size: var(--text-base);
  color: var(--text-muted);
  font-weight: var(--weight-normal);
}

/* === Grid Systems === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-5);
}

/* === Mobile === */
@media (max-width: 640px) {
  .content {
    padding: var(--space-4) var(--space-3);
  }

  .page-title {
    font-size: var(--text-2xl);
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}