/* ============================================================
   VRAJ ENGINEERING — Layout v2 (Modern Sidebar + Header + Grid)
   ============================================================ */

/* ---------- App Shell ---------- */
.app-shell {
  display: flex;
  min-height: 100vh;
  background: var(--bg-canvas);
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-default);
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-slow);
  overflow: hidden;
}

/* Sidebar Brand Area */
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-4) var(--space-4);
  min-height: var(--header-height);
  flex-shrink: 0;
  border-bottom: 1px solid var(--border-divider);
  margin: 0 var(--space-3);
}

.sidebar-logo {
  width: 34px;
  height: 34px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--fs-lg);
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.sidebar-brand-text {
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--text-heading);
  white-space: nowrap;
  overflow: hidden;
  line-height: 1.2;
}

.sidebar-brand-sub {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
}

/* Sidebar Search */
.sidebar-search {
  padding: var(--space-3) var(--space-3) var(--space-1);
  flex-shrink: 0;
}

.sidebar-search-input {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--neutral-50);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-input);
  transition: all var(--transition-fast);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.sidebar-search-input:focus-within {
  border-color: var(--primary-300);
  background: var(--bg-surface);
  box-shadow: 0 0 0 3px var(--primary-100);
}

.sidebar-search-input input {
  border: none;
  background: transparent;
  outline: none;
  flex: 1;
  font-size: var(--fs-sm);
  color: var(--text-primary);
}

.sidebar-search-input input::placeholder {
  color: var(--text-muted);
}

.sidebar-search-input svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--neutral-400);
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) var(--space-2);
  scrollbar-gutter: stable;
}

.sidebar-section {
  margin-bottom: var(--space-1);
}

.sidebar-section-title {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-2) var(--space-3) var(--space-1);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--fs-base);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
}

.sidebar-link:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sidebar-link.active {
  background: var(--bg-active);
  color: var(--primary-600);
  font-weight: 600;
}

.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  background: var(--primary-500);
  border-radius: 0 3px 3px 0;
}

.sidebar-link-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: currentColor;
}

.sidebar-link-icon svg {
  width: 18px;
  height: 18px;
}

.sidebar-link-text {
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.sidebar-badge {
  font-size: var(--fs-xs);
  font-weight: 500;
  padding: 1px 7px;
  border-radius: 10px;
  background: var(--primary-100);
  color: var(--primary-600);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.sidebar-badge-accent {
  background: var(--accent-100);
  color: var(--accent-600);
}

/* AI Indicator in Sidebar */
.sidebar-ai-section {
  margin: var(--space-1) var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: linear-gradient(135deg, var(--accent-50), var(--primary-50));
  border: 1px solid var(--accent-200);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-ai-section:hover {
  border-color: var(--accent-300);
  box-shadow: var(--shadow-sm);
}

.sidebar-ai-icon {
  width: 30px;
  height: 30px;
  background: var(--gradient-ai);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
  font-size: var(--fs-xs);
}

.sidebar-ai-icon svg {
  width: 16px;
  height: 16px;
}

.sidebar-ai-text {
  flex: 1;
  min-width: 0;
}

.sidebar-ai-label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--accent-700);
}

.sidebar-ai-desc {
  font-size: var(--fs-xs);
  color: var(--accent-500);
}

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--space-2);
  border-top: 1px solid var(--border-divider);
  flex-shrink: 0;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-user:hover {
  background: var(--bg-hover);
}

.sidebar-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: var(--fs-xs);
  flex-shrink: 0;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.sidebar-user-role {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.sidebar-user-chevron {
  color: var(--neutral-400);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

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

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 0 var(--space-6);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
  min-width: 0;
}

.header-search {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--neutral-50);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-input);
  width: 280px;
  transition: all var(--transition-fast);
}

.header-search:focus-within {
  border-color: var(--primary-300);
  background: var(--bg-surface);
  box-shadow: 0 0 0 3px var(--primary-100);
}

.header-search input {
  border: none;
  background: transparent;
  outline: none;
  flex: 1;
  font-size: var(--fs-sm);
  color: var(--text-primary);
}

.header-search input::placeholder {
  color: var(--text-muted);
}

.header-search-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--neutral-400);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-shrink: 0;
}

.header-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

.header-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.header-btn svg {
  width: 18px;
  height: 18px;
}

.header-notification-dot {
  position: absolute;
  top: 7px;
  right: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--error-text);
  border: 1.5px solid var(--bg-header);
}

.header-divider {
  width: 1px;
  height: 24px;
  background: var(--border-default);
  margin: 0 var(--space-1);
}

.header-avatar-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2) var(--space-1) var(--space-1);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.header-avatar-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-default);
}

.header-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 11px;
  flex-shrink: 0;
}

.header-avatar-name {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-primary);
  margin-left: 2px;
}

/* Header Dropdown */
.header-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-1);
  min-width: 220px;
  z-index: 200;
  animation: scaleIn 150ms cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: top right;
}

.header-dropdown.open {
  display: block;
}

.header-dropdown-header {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--border-divider);
  margin-bottom: var(--space-1);
}

.header-dropdown-email {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font-family: inherit;
}

.dropdown-item:hover {
  background: var(--bg-hover);
}

.dropdown-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--text-muted);
}

.dropdown-item-danger {
  color: var(--error-text);
}

.dropdown-item-danger svg {
  color: var(--error-text);
}

.dropdown-item-danger:hover {
  background: var(--error-bg);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-divider);
  margin: var(--space-1) 0;
}

/* ---------- Page Content ---------- */
.page-content {
  padding: var(--space-6) var(--space-8);
  flex: 1;
}

.page-header {
  margin-bottom: var(--space-6);
}

.page-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: var(--space-1);
  letter-spacing: -0.01em;
}

.page-subtitle {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--primary-600);
}

.breadcrumb-sep {
  color: var(--neutral-300);
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 500;
}

/* ---------- Grid Layouts ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-5);
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: var(--space-5);
}

.grid-sidebar {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--space-6);
}

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--border-default);
  margin-bottom: var(--space-5);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-base);
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: inherit;
}

.tab:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.tab.active {
  color: var(--primary-600);
  border-bottom-color: var(--primary-500);
  font-weight: 600;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ---------- Filter Bar ---------- */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ---------- Progress Bar ---------- */
.progress-bar {
  height: 6px;
  background: var(--neutral-100);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary-500);
  border-radius: 3px;
  transition: width var(--transition-base);
}

.progress-bar-fill.warning {
  background: var(--warning-text);
}

.progress-bar-fill.success {
  background: var(--success-text);
}

/* ---------- Responsive - Tablet ---------- */
@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-sidebar { grid-template-columns: 1fr; }
  .header-search {
    width: 200px;
  }
}

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
}

/* ---------- Responsive - Mobile ---------- */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }
  .main-content {
    margin-left: 0;
  }
  .header-search {
    width: auto;
    flex: 1;
    max-width: 240px;
  }
  .header-search input {
    width: 100%;
  }
  .page-content {
    padding: var(--space-4) var(--space-4);
  }
  .page-title {
    font-size: var(--fs-lg);
  }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-sidebar { grid-template-columns: 1fr; }
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .tabs {
    gap: 0;
  }
  .tab {
    font-size: var(--fs-sm);
    padding: var(--space-2) var(--space-3);
    flex-shrink: 0;
  }
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 99;
  }
  .sidebar-overlay.open {
    display: block;
  }
  .mobile-menu-btn {
    display: flex !important;
  }
}

/* ---------- Mobile Menu Button ---------- */
.mobile-menu-btn {
  display: none;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
}

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

.mobile-menu-btn svg {
  width: 18px;
  height: 18px;
}

/* ---------- Page Sections ---------- */
.section-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.section-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--neutral-300);
}

.section-card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-divider);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-card-title {
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--text-heading);
}

.section-card-body {
  padding: var(--space-6);
}

.section-card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-divider);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* ---------- Empty State ---------- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-6);
  text-align: center;
}

.empty-state-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--neutral-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-400);
  margin-bottom: var(--space-4);
}

.empty-state-icon svg {
  width: 24px;
  height: 24px;
}

.empty-state-title {
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: var(--space-2);
}

.empty-state-desc {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  max-width: 400px;
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

/* ---------- List Item (Activity Feed) ---------- */
.list-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  cursor: default;
}

.list-item:hover {
  background: var(--neutral-50);
}

.list-item-main {
  flex: 1;
  min-width: 0;
}

.list-item-title {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.4;
}

.list-item-sub {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: 2px;
}

.data-card-avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-500);
  flex-shrink: 0;
}

.data-card-avatar svg {
  width: 16px;
  height: 16px;
}