/* ==========================================================================
   LAYOUT
   ========================================================================== */

/* CONTAINER */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-xl) 0;
}

/* HEADER */
.header {
  background: rgba(17, 24, 39, 0.95);
  border-bottom: 1px solid rgba(100, 100, 255, 0.3);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* GRID SYSTEM */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.sidebar-layout {
  grid-template-columns: 1fr 400px;
  gap: var(--space-xl);
}

.sticky-sidebar {
  position: sticky;
  top: var(--space-xl);
  align-self: start;
}

/* FLEX UTILITIES */
.flex {
  display: flex;
}

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

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

.items-start {
  align-items: flex-start;
}

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

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

.justify-end {
  justify-content: flex-end;
}

.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); }

/* RESPONSIVE */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

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

  .header-content {
    flex-direction: column;
    gap: var(--space-md);
  }

  .header-nav {
    flex-direction: column;
    gap: var(--space-sm);
  }
}