/* ==========================================================================
   Layout Containers & Grid Utilities (Tablet-First Responsive)
   ========================================================================== */

/* Full Viewport App Containers */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  width: 100%;
  position: relative;
  overflow: hidden;
}

/* Page Wrapper / Main Content Area */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* Card Container */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  border: 2px solid var(--color-border);
  width: 100%;
}

/* Responsive Flex & Grid Helpers */
.flex {
  display: flex;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.grid {
  display: grid;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

/* Responsive Overrides */
/* Desktop (> 1024px) */
@media (min-width: 1025px) {
  .main-content {
    padding: var(--space-xl) var(--space-2xl);
  }
}

/* Mobile (< 768px) */
@media (max-width: 767px) {
  .main-content {
    padding: var(--space-sm) var(--space-md);
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}