/* ================================
   APP SHELL CSS - Header, Sidebar, Main Content
   ================================ */

/* ================================
   APP SHELL LAYOUT
   ================================ */

#app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ================================
   HEADER
   ================================ */

#app-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 20;
}

.dark #app-header {
  background-color: var(--color-gray-800);
  border-bottom-color: var(--color-gray-700);
}

/* ================================
   SIDEBAR NAVIGATION
   ================================ */

#sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: 280px;
  background-color: #ffffff;
  box-shadow: var(--shadow-lg);
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
  z-index: 30;
  overflow-y: auto;
}

.dark #sidebar {
  background-color: var(--color-gray-800);
}

/* Desktop sidebar always visible */
@media (min-width: 1024px) {
  #sidebar {
    transform: translateX(0);
  }
}

/* Sidebar when active on mobile */
#sidebar:not(.-translate-x-full) {
  transform: translateX(0);
}

/* ================================
   OVERLAY
   ================================ */

#overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 20;
}

/* ================================
   MAIN CONTENT
   ================================ */

#main-content {
  flex: 1;
  overflow-y: auto;
  transition: margin-left var(--transition-normal);
  padding-bottom: 5rem;
  padding-top: var(--spacing-2);
}

@media (min-width: 768px) {
  #main-content {
    padding-bottom: var(--spacing-4);
  }
}

@media (min-width: 1024px) {
  #main-content {
    margin-left: 280px;
  }
}

/* ================================
   BOTTOM NAVIGATION
   ================================ */

#bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  z-index: 10;
  padding-bottom: env(safe-area-inset-bottom);
}

.dark #bottom-nav {
  background-color: var(--color-gray-800);
  border-top-color: var(--color-gray-700);
}

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

/* ================================
   TOAST CONTAINER
   ================================ */

#toast-container {
  position: fixed;
  top: var(--spacing-4);
  right: var(--spacing-4);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  max-width: 20rem;
  width: 100%;
}

/* ================================
   LOADING INDICATOR
   ================================ */

#loading-indicator {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 100;
}

#loading-indicator > div {
  background-color: #ffffff;
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.dark #loading-indicator > div {
  background-color: var(--color-gray-800);
}

/* Loading spinner */
#loading-indicator .animate-spin {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 4px solid var(--color-gray-200);
  border-bottom-color: var(--color-primary);
}

/* ================================
   PAGE CONTAINER
   ================================ */

#page-container {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 var(--spacing-3);
}

@media (min-width: 768px) {
  #page-container {
    padding: 0 var(--spacing-6);
  }
}

/* ================================
   BILLING PAGE SPECIFIC
   ================================ */

/* Desktop layout with cart sidebar */
@media (min-width: 768px) {
  .page-billing #main-content,
  .page-billing .container {
    margin-right: 384px;
    width: auto;
    max-width: none;
  }

  body:not(.page-billing) .container {
    max-width: 100%;
    width: 100%;
  }

  #order-sidebar {
    border-left: 1px solid var(--border-color);
    display: block !important;
  }
}

/* ================================
   ORDER SIDEBAR (Billing)
   ================================ */

#order-sidebar {
  position: fixed;
  right: 0;
  top: 0;
  bottom: 0;
  width: 24rem;
  background-color: #ffffff;
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-4);
  overflow-y: auto;
  z-index: 20;
}

.dark #order-sidebar {
  background-color: var(--color-gray-800);
}

@media (max-width: 767px) {
  #order-sidebar {
    display: none !important;
  }
}

/* ================================
   MOBILE CART
   ================================ */

#mobile-cart-container {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 30;
}

#mobile-cart-summary-bar {
  background-color: #ffffff;
  padding: var(--spacing-3);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.dark #mobile-cart-summary-bar {
  background-color: var(--color-gray-800);
}

#mobile-cart-panel {
  background-color: #ffffff;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.dark #mobile-cart-panel {
  background-color: var(--color-gray-700);
}

#mobile-cart-panel.expanded {
  max-height: 70vh;
}

@media (min-width: 768px) {
  #mobile-cart-container {
    display: none;
  }
}