/* App Shell Container */
.app-shell {
  display: flex;
  min-height: 100vh;
  width: 100%;
  position: relative;
}

/* Sidebar Layout (Desktop) */
.app-sidebar {
  width: var(--sidebar-width);
  background-color: #0f172a;
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: var(--z-sidebar);
  transition: transform var(--transition-normal);
}

.sidebar-header {
  height: var(--header-height);
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: #ffffff;
}

.sidebar-brand-badge {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 2px 6px;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
}

.sidebar-nav {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: var(--space-4) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-section-title {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748b;
  padding: var(--space-2) var(--space-4);
  font-weight: var(--font-weight-semibold);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.625rem var(--space-4);
  color: #94a3b8;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  border-left: 3px solid transparent;
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

.nav-link.active {
  background-color: rgba(37, 99, 235, 0.15);
  color: #60a5fa;
  border-left-color: #3b82f6;
  font-weight: var(--font-weight-semibold);
}

.nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-footer {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-profile-summary {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  overflow: hidden;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.user-details {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role-badge {
  font-size: 11px;
  color: #94a3b8;
  text-transform: capitalize;
}

/* Main Content Area */
.app-main {
  flex: 1 1 auto;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-width: 0;
}

/* Top Navigation Header */
.app-header {
  height: var(--header-height);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: var(--z-header);
}

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

.header-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin: 0;
}

.sidebar-toggle-btn {
  display: none;
  background: none;
  border: none;
  padding: var(--space-2);
  color: var(--color-text-main);
  border-radius: var(--radius-md);
}

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

/* Connectivity Pill */
.connectivity-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.connectivity-pill.online {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

.connectivity-pill.offline {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
}

.connectivity-pill.syncing {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
}

.connectivity-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: currentColor;
}

/* Page Content Body */
.content-area {
  flex: 1 1 auto;
  padding: var(--space-4);
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

/* Mobile Bottom Navigation Bar (<= 768px) */
.app-bottom-nav {
  display: none;
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .app-sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-xl);
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.5);
    z-index: calc(var(--z-sidebar) - 1);
    display: none;
  }

  .sidebar-backdrop.active {
    display: block;
  }

  .app-main {
    margin-left: 0;
    padding-bottom: var(--bottom-nav-height);
  }

  .sidebar-toggle-btn {
    display: flex;
  }

  .app-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    z-index: var(--z-bottom-nav);
    align-items: center;
    justify-content: space-around;
    padding: 0 var(--space-2);
  }

  .bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    color: var(--color-text-muted);
    font-size: 11px;
    padding: var(--space-1);
    flex: 1;
    min-height: var(--touch-target-min);
  }

  .bottom-nav-item.active {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
  }

  .bottom-nav-icon {
    width: 20px;
    height: 20px;
  }
}

/* Print Stylesheet */
@media print {
  .app-sidebar,
  .app-header,
  .app-bottom-nav,
  .btn,
  .modal-backdrop,
  .toast-container {
    display: none !important;
  }

  .app-main {
    margin: 0 !important;
    padding: 0 !important;
  }

  .content-area {
    padding: 0 !important;
    max-width: 100% !important;
  }

  body {
    background-color: #ffffff !important;
    color: #000000 !important;
  }

  .card {
    border: none !important;
    box-shadow: none !important;
  }
}