/**
 * Layout CSS
 * Mobile-First UI/UX Redesign
 *
 * App shell structure, responsive layout system, sidebar, bottom navigation,
 * hamburger drawer, top bar, and CSS Grid system.
 * Mobile-first: base styles target 375px+, enhanced via min-width queries.
 */

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

.app-shell {
  display: flex;
  min-height: 100vh;
  width: 100%;
  background: var(--color-background);
}

/* ============================================
   SIDEBAR NAVIGATION (Desktop / Tablet ≥768px)
   ============================================ */

.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 260px;
  background: var(--color-surface-base);
  border-right: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  z-index: 2000;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateX(-100%);
  transition: transform var(--duration-base) var(--ease-smooth);
}

/* Show sidebar on tablet+ */
@media (min-width: 768px) {
  .app-sidebar {
    transform: translateX(0);
  }
}

.app-sidebar__header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  min-height: 60px;
}

.app-sidebar__logo {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-700);
  text-decoration: none;
  letter-spacing: var(--letter-spacing-tight);
}

.app-sidebar__logo:hover {
  color: var(--color-primary-800);
}

.app-sidebar__nav {
  flex: 1;
  padding: var(--space-3) 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.app-sidebar__footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
}

/* Nav Group Labels */
.nav-group-label {
  padding: var(--space-6) var(--space-6) var(--space-2);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-tertiary);
  font-weight: var(--font-weight-semibold);
}

.nav-group-label:first-child {
  padding-top: var(--space-2);
}

/* Nav Items */
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--duration-fast) var(--ease-smooth);
  min-height: var(--touch-target-min);
  border-left: 3px solid transparent;
  -webkit-tap-highlight-color: transparent;
}

.nav-item:hover {
  background: var(--color-neutral-100);
  color: var(--color-text-primary);
}

.nav-item:active {
  transform: scale(0.98);
}

.nav-item--active {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
  border-left-color: var(--color-primary-600);
  font-weight: var(--font-weight-semibold);
}

.nav-item__icon {
  font-size: 1.15rem;
  width: 1.5rem;
  text-align: center;
  flex-shrink: 0;
}

.nav-item__badge {
  margin-left: auto;
  background: var(--color-danger-500);
  color: var(--color-text-inverse);
  font-size: 0.65rem;
  font-weight: var(--font-weight-bold);
  padding: 2px 6px;
  border-radius: var(--radius-full);
  min-width: 18px;
  text-align: center;
}

/* Nav Divider */
.nav-divider {
  height: 1px;
  background: var(--color-border-subtle);
  margin: var(--space-2) var(--space-6);
}

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

.app-main {
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  width: 100%;
  transition: margin-left var(--duration-base) var(--ease-smooth);
}

@media (min-width: 768px) {
  .app-main {
    margin-left: 260px;
  }
}

/* ============================================
   TOP BAR
   ============================================ */

.app-topbar {
  height: 60px;
  background: var(--color-surface-base);
  border-bottom: 1px solid var(--color-border-subtle);
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 999;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .app-topbar {
    padding: 0 var(--space-6);
  }
}

.app-topbar__left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.app-topbar__right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Hamburger Button (mobile only) */
.app-topbar__hamburger {
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--color-text-primary);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  border-radius: var(--radius-base);
  transition: background var(--duration-fast) var(--ease-smooth);
}

.app-topbar__hamburger:hover {
  background: var(--color-neutral-100);
}

.app-topbar__hamburger:active {
  transform: scale(0.95);
}

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

/* Mobile Logo in Top Bar */
.app-topbar__logo {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-700);
  text-decoration: none;
}

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

/* Breadcrumb (desktop only) */
.app-topbar__breadcrumb {
  display: none;
}

@media (min-width: 768px) {
  .app-topbar__breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
  }
}

.breadcrumb-link {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.breadcrumb-link:hover {
  color: var(--color-text-primary);
}

.breadcrumb-sep {
  color: var(--color-text-tertiary);
}

/* Icon buttons in top bar (notifications, etc.) */
.topbar-icon-btn {
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-base);
  position: relative;
  transition: all var(--duration-fast) var(--ease-smooth);
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
}

.topbar-icon-btn:hover {
  background: var(--color-neutral-100);
  color: var(--color-text-primary);
}

.topbar-icon-btn:active {
  transform: scale(0.95);
}

.topbar-icon-btn__badge {
  position: absolute;
  top: 6px;
  right: 6px;
  background: var(--color-danger-500);
  color: var(--color-text-inverse);
  font-size: 0.6rem;
  font-weight: var(--font-weight-bold);
  padding: 1px 4px;
  border-radius: var(--radius-full);
  min-width: 16px;
  text-align: center;
  line-height: 1.3;
}

/* User Avatar */
.user-avatar-sm {
  width: 32px;
  height: 32px;
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

/* User dropdown trigger */
.user-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text-primary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-base);
  transition: background var(--duration-fast) var(--ease-smooth);
  cursor: pointer;
  min-height: var(--touch-target-min);
  -webkit-tap-highlight-color: transparent;
}

.user-dropdown-trigger:hover {
  background: var(--color-neutral-100);
}

.user-dropdown-trigger__info {
  display: none;
}

@media (min-width: 768px) {
  .user-dropdown-trigger__info {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
  }
}

.user-dropdown-trigger__name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.user-dropdown-trigger__role {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* ============================================
   HAMBURGER DRAWER (Mobile Staff/Owners)
   ============================================ */

.app-drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-smooth);
  z-index: 1999;
}

.app-drawer-overlay--visible {
  opacity: 1;
  pointer-events: auto;
}

/* Reuse sidebar as drawer on mobile */
.app-sidebar--drawer-open {
  transform: translateX(0);
  box-shadow: var(--shadow-xl);
}

/* ============================================
   BOTTOM NAVIGATION (Mobile Customers)
   ============================================ */

.app-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface-base);
  border-top: 1px solid var(--color-border-subtle);
  padding-bottom: env(safe-area-inset-bottom);
  z-index: 1000;
  display: none;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.06);
}

@media (max-width: 767px) {
  .app-shell--customer .app-bottom-nav {
    display: flex;
    justify-content: space-around;
    align-items: stretch;
  }

  .app-shell--customer .app-content {
    padding-bottom: calc(68px + env(safe-area-inset-bottom));
  }
}

.bottom-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: var(--space-2) var(--space-1);
  min-height: var(--touch-target-comfortable);
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-smooth);
  -webkit-tap-highlight-color: transparent;
  position: relative;
}

.bottom-nav__item:active {
  transform: scale(0.93);
  transition: transform 80ms var(--ease-spring);
}

.bottom-nav__item--active {
  color: var(--color-primary-600);
}

.bottom-nav__item--active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 3px;
  background: var(--color-primary-600);
  border-radius: 0 0 var(--radius-full) var(--radius-full);
}

.bottom-nav__icon {
  font-size: 1.35rem;
  line-height: 1;
}

.bottom-nav__label {
  font-size: 0.65rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  letter-spacing: 0.02em;
}

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

.app-content {
  flex: 1;
  padding: var(--space-4);
  max-width: 100%;
  overflow-x: hidden;
}

@media (min-width: 768px) {
  .app-content {
    padding: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .app-content {
    padding: var(--space-6) var(--space-8);
  }
}

/* Constrained content width */
.content-container {
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

/* ============================================
   FOOTER
   ============================================ */

.app-footer {
  text-align: center;
  padding: var(--space-4);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  border-top: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
}

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

.messages-container {
  margin-bottom: var(--space-4);
}

/* ============================================
   CSS GRID LAYOUT SYSTEM
   ============================================ */

/* Base grid — single column on mobile */
.grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

/* 2 columns on tablet+ */
@media (min-width: 768px) {
  .grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* Multi-column on desktop */
@media (min-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .grid-cols-5 {
    grid-template-columns: repeat(5, 1fr);
  }

  .grid-cols-auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .grid-cols-auto-fill {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}

/* Stat cards grid — 1 col mobile, 2 col tablet, 4 col desktop */
.stats-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Dashboard layout — main + sidebar */
.dashboard-layout {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
  .dashboard-layout {
    grid-template-columns: 2fr 1fr;
  }
}

/* Column span */
.col-span-2 { grid-column: span 2; }
.col-span-full { grid-column: 1 / -1; }

@media (max-width: 767px) {
  .col-span-2 { grid-column: span 1; }
}

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

.page-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-subtle);
}

@media (min-width: 768px) {
  .page-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.page-header__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin: 0;
}

.page-header__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: var(--space-1) 0 0;
}

.page-header__actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}