/* ============================================
   Layout System - Responsive Grid
   ============================================ */

/* Container */
.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 640px) {
  .container { max-width: 640px; }
}

@media (min-width: 768px) {
  .container { max-width: 768px; }
}

@media (min-width: 1024px) {
  .container { max-width: 1024px; }
}

@media (min-width: 1280px) {
  .container { max-width: 1280px; }
}

@media (min-width: 1536px) {
  .container { max-width: 1536px; }
}

/* App Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
  background-color: var(--color-gray-50);
}

/* Sidebar */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background-color: var(--color-white);
  border-right: 1px solid var(--color-gray-200);
  z-index: var(--z-fixed);
  transition: width var(--transition-base), transform var(--transition-base);
  overflow: hidden; /* Completely hide overflow */
  display: flex;
  flex-direction: column;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
  overflow: hidden; /* Force hide overflow when collapsed */
}

/* RTL Support */
body[dir="rtl"] .sidebar {
  left: auto;
  right: 0;
  border-right: none;
  border-left: 1px solid var(--color-gray-200);
}

/* Mobile: Hide sidebar by default */
@media (max-width: 767px) {
  .sidebar {
    transform: translateX(-100%);
    z-index: var(--z-fixed);
    max-width: 80%;
    width: 280px;
    box-shadow: none;
  }
  
  body[dir="rtl"] .sidebar {
    transform: translateX(100%);
  }
  
  .sidebar.open {
    transform: translateX(0) !important;
    box-shadow: var(--shadow-xl);
  }
}

/* Desktop: Show sidebar */
@media (min-width: 768px) {
  .sidebar {
    transform: translateX(0);
    box-shadow: var(--shadow-sm);
  }
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: 0;
  transition: margin-left var(--transition-base);
}

@media (min-width: 768px) {
  .main-content {
    margin-left: var(--sidebar-width);
  }
  
  .main-content.sidebar-collapsed {
    margin-left: var(--sidebar-collapsed-width);
  }
  
  body[dir="rtl"] .main-content {
    margin-left: 0;
    margin-right: var(--sidebar-width);
  }
  
  body[dir="rtl"] .main-content.sidebar-collapsed {
    margin-right: var(--sidebar-collapsed-width);
  }
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  gap: var(--space-4);
}

/* Page Content */
.page-content {
  flex: 1;
  padding: var(--space-6);
  overflow-x: hidden;
}

@media (max-width: 640px) {
  .page-content {
    padding: var(--space-4);
  }
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sm\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Mobile Bottom Navigation */
.mobile-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--mobile-nav-height);
  background-color: var(--color-white);
  border-top: 1px solid var(--color-gray-200);
  z-index: var(--z-fixed);
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 0 var(--space-2);
}

@media (min-width: 768px) {
  .mobile-nav {
    display: none;
  }
}

/* Overlay for mobile menu */
.overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.overlay.active {
  opacity: 1;
  pointer-events: all;
}