/* ============================================
   التخطيط — مدير التوصيل
   Sidebar, Header, Grid System, Responsive
   ============================================ */

/* ── App Layout ── */
.app {
  display: flex;
  min-height: 100vh;
  position: relative;
}

.app-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-inline-start var(--transition-normal);
  margin-inline-start: var(--sidebar-width);
}

.main-content {
  flex: 1;
  padding: var(--spacing-xl);
  padding-top: calc(var(--header-height) + var(--spacing-xl));
  max-width: var(--content-max-width);
  width: 100%;
  margin: 0 auto;
}

/* ── Sidebar ── */
.sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-left: 1px solid var(--border-primary);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sticky);
  transition: all var(--transition-normal);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-header {
  padding: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  border-bottom: 1px solid var(--border-secondary);
  min-height: var(--header-height);
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary-600), var(--primary-400));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #FFFFFF;
  flex-shrink: 0;
}

.sidebar-brand {
  display: flex;
  flex-direction: column;
}

.sidebar-brand-name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  line-height: 1.2;
}

.sidebar-brand-sub {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md);
}

.sidebar-section {
  margin-bottom: var(--spacing-lg);
}

.sidebar-section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-xs);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  cursor: pointer;
  margin-bottom: 2px;
  position: relative;
}

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

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

[data-theme="dark"] .nav-item.active {
  background: rgba(99, 102, 241, 0.12);
  color: var(--primary-400);
}

.nav-item .nav-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

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

.nav-item .nav-badge {
  margin-inline-start: auto;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  background: var(--danger-500);
  color: #FFFFFF;
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--border-secondary);
}

/* ── Header ── */
.header {
  position: fixed;
  top: 0;
  right: var(--sidebar-width);
  left: 0;
  height: var(--header-height);
  background: var(--bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-secondary);
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-xl);
  z-index: var(--z-sticky);
  transition: right var(--transition-normal);
}

.header-start {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex: 1;
}

.header-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.header-subtitle {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--bg-hover);
}

.header-end {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Search Bar */
.search-bar {
  position: relative;
  max-width: 320px;
  flex: 1;
}

.search-bar input {
  width: 100%;
  height: 40px;
  padding: 0 var(--spacing-base);
  padding-right: 40px;
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.search-bar input:focus {
  background: var(--bg-input);
  border-color: var(--primary-300);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.search-bar .search-icon {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}

/* ── Overlay ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-sticky) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ── Grid System ── */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

.grid-auto {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* ── Page Header ── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
}

.page-actions {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

/* ── Filter Bar ── */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

/* ── Modal / Dialog ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-modal);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-sm { max-width: 400px; }
.modal-lg { max-width: 720px; }
.modal-xl { max-width: 900px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--border-secondary);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
}

.modal-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-xl);
}

.modal-footer {
  display: flex;
  justify-content: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-top: 1px solid var(--border-secondary);
}

/* ── Toast / Snackbar ── */
.toast-container {
  position: fixed;
  top: var(--spacing-xl);
  left: var(--spacing-xl);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 320px;
  max-width: 480px;
  pointer-events: all;
  transform: translateX(-120%);
  animation: toast-in 0.4s var(--transition-spring) forwards;
  border-right: 3px solid var(--primary-500);
}

.toast.removing {
  animation: toast-out 0.3s ease-in forwards;
}

.toast-success { border-right-color: var(--success-500); }
.toast-error   { border-right-color: var(--danger-500); }
.toast-warning { border-right-color: var(--warning-500); }
.toast-info    { border-right-color: var(--info-500); }

.toast-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.toast-message {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  margin-top: 2px;
}

.toast-close {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.toast-close:hover {
  background: var(--bg-hover);
}

@keyframes toast-in {
  from { transform: translateX(-120%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

@keyframes toast-out {
  from { transform: translateX(0); opacity: 1; }
  to   { transform: translateX(-120%); opacity: 0; }
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(100%);
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-2xl);
  }

  .sidebar-overlay {
    display: block;
  }

  .app-content {
    margin-inline-start: 0;
  }

  .header {
    right: 0;
    padding: 0 var(--spacing-base);
  }

  .menu-toggle {
    display: flex;
  }

  .main-content {
    padding: var(--spacing-base);
    padding-top: calc(var(--header-height) + var(--spacing-base));
  }

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

  .page-header {
    flex-direction: column;
    align-items: stretch;
  }

  .page-actions {
    justify-content: stretch;
  }

  .page-actions .btn {
    flex: 1;
  }

  .search-bar {
    max-width: 100%;
  }

  .modal {
    margin: var(--spacing-base);
    max-height: 85vh;
  }

  .toast-container {
    left: var(--spacing-base);
    right: var(--spacing-base);
  }

  .toast {
    min-width: auto;
    width: 100%;
  }

  .filter-bar {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--spacing-sm);
  }

  .filter-bar > * {
    flex-shrink: 0;
  }

  .hide-mobile {
    display: none !important;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-xl: 1rem;
    --spacing-2xl: 1.5rem;
  }

  .stat-card .stat-value {
    font-size: var(--font-size-xl);
  }
}