/* ============================================
   TeCortex - Futuristic Design System
   ============================================ */

/* CSS Custom Properties */
:root {
  /* Primary Colors - Futuristic Blue/Cyan */
  --primary: #00d4ff;
  --primary-hover: #00a8cc;
  --primary-light: rgba(0, 212, 255, 0.15);
  --primary-dark: #0077b6;
  --primary-glow: rgba(0, 212, 255, 0.4);

  /* Accent Colors */
  --accent: #7c3aed;
  --accent-hover: #6d28d9;
  --accent-light: rgba(124, 58, 237, 0.15);

  /* SPC Zone Colors */
  --zone-green: #10b981;
  --zone-green-glow: rgba(16, 185, 129, 0.3);
  --zone-yellow: #f59e0b;
  --zone-yellow-glow: rgba(245, 158, 11, 0.3);
  --zone-red: #ef4444;
  --zone-red-glow: rgba(239, 68, 68, 0.3);

  /* Semantic Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;

  /* Dark Theme Backgrounds (default) */
  --bg-primary: #0a0e17;
  --bg-primary-rgb: 10, 14, 23;
  --bg-secondary: #111827;
  --bg-card: #1a1f2e;
  --bg-elevated: #232a3b;
  --bg-hover: #2d3548;

  /* Text Colors */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0a0e17;

  /* Border Colors */
  --border-color: #2d3548;
  --border-light: #374151;
  --border-glow: rgba(0, 212, 255, 0.3);

  /* Chart Colors (for JS access) */
  --chart-grid: #2d3548;
  --chart-text: #64748b;
  --chart-label: #94a3b8;
  --chart-tooltip-bg: #1a1f2e;
  --chart-tooltip-border: #2d3548;
  --chart-tooltip-title: #f1f5f9;
  --chart-tooltip-body: #94a3b8;

  /* Typography */
  --font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--primary-glow);

  /* Layout */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 72px;
  --header-height: 64px;
  --container-max: 1800px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Light Theme
   ============================================ */
[data-theme="light"] {
  /* Light Theme Backgrounds */
  --bg-primary: #f8fafc;
  --bg-primary-rgb: 248, 250, 252;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-elevated: #f1f5f9;
  --bg-hover: #e2e8f0;

  /* Light Theme Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #f8fafc;

  /* Light Theme Border Colors */
  --border-color: #e2e8f0;
  --border-light: #cbd5e1;

  /* Light Theme Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* Light Theme Primary adjustments for better contrast */
  --primary: #0891b2;
  --primary-hover: #0e7490;
  --primary-light: rgba(8, 145, 178, 0.1);
  --primary-dark: #155e75;
  --primary-glow: rgba(8, 145, 178, 0.2);

  /* Light Theme Chart Colors */
  --chart-grid: #e2e8f0;
  --chart-text: #64748b;
  --chart-label: #475569;
  --chart-tooltip-bg: #ffffff;
  --chart-tooltip-border: #e2e8f0;
  --chart-tooltip-title: #0f172a;
  --chart-tooltip-body: #475569;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Futuristic background pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at top left, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(124, 58, 237, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
  transition: background var(--transition-base);
}

/* Light theme background pattern */
[data-theme="light"] body::before,
body[data-theme="light"]::before {
  background:
    radial-gradient(ellipse at top left, rgba(8, 145, 178, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(124, 58, 237, 0.03) 0%, transparent 50%);
}

/* Theme transition for smooth switching */
body,
.app-shell__sidebar,
.header,
.card,
.metric-card,
.chart-card,
.modal-content,
.toast,
.form-input,
.btn {
  transition: background-color var(--transition-base),
              border-color var(--transition-base),
              color var(--transition-base),
              box-shadow var(--transition-base);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ============================================
   App Shell Layout
   ============================================ */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.app-shell__main {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition-base);
}

/* Sidebar overlay (mobile) */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--transition-base);
  backdrop-filter: blur(4px);
}

.sidebar-overlay.is-visible {
  display: block;
  opacity: 1;
}

/* Mobile sidebar */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    border-radius: 0;
  }

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

  .app-shell__main {
    margin-left: 0 !important;
  }
}

/* ============================================
   Sidebar Styles - Clean Minimal Design
   ============================================ */

/* Sidebar-specific colors (dark mode) */
:root {
  --sidebar-bg: #000000;
  --sidebar-border: #262626;
  --sidebar-text: #fafafa;
  --sidebar-text-muted: #a3a3a3;
  --sidebar-hover: #171717;
  --sidebar-active: #171717;
  --sidebar-input-bg: #000000;
  --sidebar-spring: cubic-bezier(0.25, 1.1, 0.4, 1);
}

/* Light mode sidebar colors */
[data-theme="light"] {
  --sidebar-bg: #ffffff;
  --sidebar-border: #e5e5e5;
  --sidebar-text: #171717;
  --sidebar-text-muted: #737373;
  --sidebar-hover: #f5f5f5;
  --sidebar-active: #f5f5f5;
  --sidebar-input-bg: #fafafa;
}

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  z-index: 100;
  padding: 16px;
  gap: 16px;
  border-radius: 0 16px 16px 0;
  transition: transform 500ms var(--sidebar-spring), width 500ms var(--sidebar-spring);
}

/* Branding */
.sidebar__branding {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px;
}

.sidebar__logo {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sidebar-text);
  flex-shrink: 0;
}

.sidebar__brand-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--sidebar-text);
  letter-spacing: -0.025em;
}

/* Search */
.sidebar__search {
  width: 100%;
}

.sidebar__search-input {
  display: flex;
  align-items: center;
  height: 40px;
  background: var(--sidebar-input-bg);
  border: 1px solid var(--sidebar-border);
  border-radius: 8px;
  padding: 0 4px;
  transition: border-color 150ms ease;
}

.sidebar__search-input:focus-within {
  border-color: var(--primary);
}

.sidebar__search-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sidebar-text);
  flex-shrink: 0;
}

.sidebar__search-field {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 14px;
  color: var(--sidebar-text);
  padding: 0 8px;
}

.sidebar__search-field:focus {
  box-shadow: 0 0 0 2px var(--primary);
  border-radius: 4px;
}

.sidebar__search-field::placeholder {
  color: var(--sidebar-text-muted);
}

/* Menu */
.sidebar__menu {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--sidebar-border) transparent;
}

.sidebar__menu::-webkit-scrollbar {
  width: 4px;
}

.sidebar__menu::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar__menu::-webkit-scrollbar-thumb {
  background: var(--sidebar-border);
  border-radius: 4px;
}

/* Section */
.sidebar__section {
  display: flex;
  flex-direction: column;
}

.sidebar__section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--sidebar-text-muted);
  flex: 1;
}

/* Section Header (Clickable) */
.sidebar__section-header {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  height: 36px;
  padding: 0 16px;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: background-color 150ms ease;
}

.sidebar__section-header:hover {
  background: var(--sidebar-hover);
}

.sidebar__section-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sidebar-text-muted);
  flex-shrink: 0;
  margin-right: 10px;
}

.sidebar__section-header:hover .sidebar__section-icon {
  color: var(--sidebar-text);
}

.sidebar__section-chevron {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sidebar-text-muted);
  transition: transform 200ms ease;
}

.sidebar__section-header[aria-expanded="false"] .sidebar__section-chevron {
  transform: rotate(-90deg);
}

.sidebar__section-content {
  display: flex;
  flex-direction: column;
}

/* Menu Item */
.sidebar__item {
  width: 100%;
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  height: 40px;
  padding: 0 16px;
  border: none;
  background: transparent;
  border-radius: 8px;
  color: var(--sidebar-text);
  font-size: 14px;
  font-weight: 400;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease;
}

.sidebar__link:hover {
  background: var(--sidebar-hover);
  color: var(--sidebar-text);
}

.sidebar__link.is-active {
  background: var(--sidebar-active);
  color: var(--sidebar-text);
}

.sidebar__link--expandable {
  text-align: left;
  font-family: inherit;
}

.sidebar__link-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: inherit;
}

.sidebar__link-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__link-chevron {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 500ms var(--sidebar-spring);
}

.sidebar__link.is-expanded .sidebar__link-chevron {
  transform: rotate(180deg);
}

/* Submenu */
.sidebar__submenu {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 500ms var(--sidebar-spring), opacity 300ms ease;
  padding-left: 36px;
}

.sidebar__submenu.is-open {
  max-height: 200px;
  opacity: 1;
}

.sidebar__sublink {
  display: flex;
  align-items: center;
  height: 40px;
  padding: 0 12px;
  border-radius: 8px;
  color: var(--sidebar-text-muted);
  font-size: 14px;
  text-decoration: none;
  transition: background-color 150ms ease, color 150ms ease;
}

.sidebar__sublink:hover {
  background: var(--sidebar-hover);
  color: var(--sidebar-text);
}

.sidebar__sublink.is-active {
  background: var(--sidebar-active);
  color: var(--sidebar-text);
}

/* Pin Button */
.sidebar__item {
  position: relative;
}

.sidebar__pin-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 4px;
  color: var(--sidebar-text-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 150ms ease, background-color 150ms ease, color 150ms ease;
}

.sidebar__item:hover .sidebar__pin-btn {
  opacity: 1;
}

.sidebar__pin-btn:hover {
  background: var(--sidebar-hover);
  color: var(--primary);
}

.sidebar__pin-btn.is-pinned {
  opacity: 1;
  color: var(--warning);
}

.sidebar__pin-btn.is-pinned svg {
  fill: var(--warning);
}

/* Badges */
.sidebar__badge {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 10px;
  margin-left: auto;
  margin-right: 28px;
  text-transform: uppercase;
}

.sidebar__badge--live {
  background: var(--danger);
  color: white;
  animation: pulse-badge 2s infinite;
}

.sidebar__badge--status {
  background: var(--success);
  color: white;
}

.sidebar__badge--status[data-state="down"] {
  background: var(--danger);
}

.sidebar__badge--status[data-state="standby"] {
  background: var(--warning);
}

.sidebar__badge--info {
  background: var(--info);
  color: white;
}

@keyframes pulse-badge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Quick Access Section */
.sidebar__section--quick-access {
  margin-top: auto;
  border-top: 1px solid var(--sidebar-border);
  padding-top: 8px;
}

.sidebar__quick-group {
  padding: 0 8px;
  margin-bottom: 8px;
}

.sidebar__quick-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--sidebar-text-muted);
  padding: 4px 8px;
}

.sidebar__quick-items {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar__quick-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 32px;
  padding: 0 8px;
  border-radius: 6px;
  color: var(--sidebar-text);
  font-size: 13px;
  text-decoration: none;
  transition: background-color 150ms ease;
}

.sidebar__quick-item:hover {
  background: var(--sidebar-hover);
}

.sidebar__quick-item-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__quick-remove {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 4px;
  color: var(--sidebar-text-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 150ms ease, background-color 150ms ease, color 150ms ease;
}

.sidebar__quick-item:hover .sidebar__quick-remove {
  opacity: 1;
}

.sidebar__quick-remove:hover {
  background: var(--danger);
  color: white;
}

.sidebar__quick-empty {
  font-size: 11px;
  color: var(--sidebar-text-muted);
  padding: 4px 8px;
  font-style: italic;
}

/* Footer */
.sidebar__footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar__divider {
  height: 1px;
  background: var(--sidebar-border);
  margin: 0 8px;
}

/* Context Items (Line, Product) */
.sidebar__context-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin: 4px 4px;
  border-radius: 8px;
  background: var(--sidebar-input-bg);
  border: 1px dashed var(--sidebar-border);
  text-decoration: none;
  cursor: pointer;
  transition: all 150ms ease;
}

.sidebar__context-item:hover {
  background: var(--sidebar-hover);
  border-color: var(--primary);
}

.sidebar__context-item.has-selection {
  border-style: solid;
  background: rgba(0, 212, 255, 0.03);
}

.sidebar__line.has-selection {
  border-color: var(--accent);
}

.sidebar__product.has-selection {
  border-color: var(--primary);
}

.sidebar__context-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sidebar-hover);
  border-radius: 6px;
  color: var(--sidebar-text-muted);
  flex-shrink: 0;
  transition: all 150ms ease;
}

.sidebar__line .sidebar__context-icon.has-selection {
  background: var(--accent);
  color: white;
}

.sidebar__product .sidebar__context-icon.has-selection {
  background: var(--primary);
  color: var(--bg-primary);
}

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

.sidebar__context-label {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--sidebar-text-muted);
  margin-bottom: 1px;
}

.sidebar__context-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--sidebar-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

.sidebar__line.has-selection .sidebar__context-name {
  color: var(--accent);
}

.sidebar__product.has-selection .sidebar__context-name {
  color: var(--primary);
}

.sidebar__context-detail {
  font-size: 10px;
  color: var(--sidebar-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: var(--font-mono);
}

.sidebar__context-action {
  color: var(--sidebar-text-muted);
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 150ms ease;
}

.sidebar__context-item:hover .sidebar__context-action {
  opacity: 1;
}

/* Collapsed sidebar - context items */
.sidebar.is-collapsed .sidebar__context-item {
  padding: 6px;
  justify-content: center;
  margin: 2px 4px;
}

.sidebar.is-collapsed .sidebar__context-info,
.sidebar.is-collapsed .sidebar__context-action {
  display: none;
}

.sidebar.is-collapsed .sidebar__context-icon {
  width: 28px;
  height: 28px;
}

.sidebar__user {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
}

.sidebar__user-avatar {
  width: 32px;
  height: 32px;
  background: var(--sidebar-input-bg);
  border: 1px solid var(--sidebar-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sidebar-text);
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 600;
}

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

.sidebar__user-name {
  font-size: 14px;
  font-weight: 400;
  color: var(--sidebar-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__user-role {
  font-size: 12px;
  color: var(--sidebar-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__user-menu {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--sidebar-text);
  cursor: pointer;
  transition: background-color 150ms ease;
}

.sidebar__user-menu:hover {
  background: var(--sidebar-hover);
}

.sidebar__user-menu.is-active {
  background: var(--sidebar-hover);
}

/* User Dropdown Menu */
.sidebar__user-dropdown {
  position: absolute;
  bottom: 100%;
  right: 0;
  min-width: 200px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 150ms ease, transform 150ms ease, visibility 150ms ease;
  z-index: 1000;
}

.sidebar__user-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.sidebar__user-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
}

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

.sidebar__user-dropdown-item--danger {
  color: var(--zone-red);
}

.sidebar__user-dropdown-item--danger:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--zone-red);
}

.sidebar__user-dropdown-item svg {
  flex-shrink: 0;
  opacity: 0.7;
}

.sidebar__user-dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: var(--spacing-xs) 0;
}

/* Position the dropdown relative to sidebar__user */
.sidebar__user {
  position: relative;
}

/* Collapse Button */
.sidebar__collapse-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--sidebar-text-muted);
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease, transform 500ms var(--sidebar-spring);
  margin-left: auto;
  flex-shrink: 0;
}

.sidebar__collapse-btn:hover {
  background: var(--sidebar-hover);
  color: var(--sidebar-text);
}

/* Collapsed State */
.sidebar.is-collapsed {
  width: 72px;
  padding: 16px 8px;
}

.sidebar.is-collapsed .sidebar__brand-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sidebar.is-collapsed .sidebar__collapse-btn {
  transform: rotate(180deg);
}

.sidebar.is-collapsed .sidebar__search {
  display: none;
}

.sidebar.is-collapsed .sidebar__section-title {
  opacity: 0;
  height: 8px;
  padding: 0;
}

.sidebar.is-collapsed .sidebar__link {
  justify-content: center;
  padding: 0;
}

.sidebar.is-collapsed .sidebar__link-text,
.sidebar.is-collapsed .sidebar__link-chevron {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sidebar.is-collapsed .sidebar__submenu {
  display: none;
}

.sidebar.is-collapsed .sidebar__user-info,
.sidebar.is-collapsed .sidebar__user-menu {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sidebar.is-collapsed .sidebar__user {
  justify-content: center;
  padding: 8px 0;
}

/* Tooltip for collapsed state */
.sidebar.is-collapsed .sidebar__link {
  position: relative;
}

.sidebar.is-collapsed .sidebar__link::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  background: var(--sidebar-bg);
  border: 1px solid var(--sidebar-border);
  color: var(--sidebar-text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 150ms ease;
  margin-left: 8px;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.sidebar.is-collapsed .sidebar__link:hover::after {
  opacity: 1;
}

/* Collapsed state for new navigation elements */
.sidebar.is-collapsed .sidebar__section-header {
  justify-content: center;
  padding: 0;
  height: 44px;
}

.sidebar.is-collapsed .sidebar__section-icon {
  margin-right: 0;
  width: 24px;
  height: 24px;
}

.sidebar.is-collapsed .sidebar__section-header {
  position: relative;
}

.sidebar.is-collapsed .sidebar__section-header::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  background: var(--sidebar-bg);
  border: 1px solid var(--sidebar-border);
  color: var(--sidebar-text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 150ms ease;
  margin-left: 8px;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.sidebar.is-collapsed .sidebar__section-header:hover::after {
  opacity: 1;
}

.sidebar.is-collapsed .sidebar__section-title,
.sidebar.is-collapsed .sidebar__section-chevron {
  display: none;
}

.sidebar.is-collapsed .sidebar__pin-btn {
  display: none;
}

.sidebar.is-collapsed .sidebar__badge {
  display: none;
}

.sidebar.is-collapsed .sidebar__section--quick-access {
  display: none;
}

/* Main content adjustment for collapsed sidebar */
.app-shell__main {
  transition: margin-left 500ms var(--sidebar-spring);
}

.app-shell--sidebar-collapsed .app-shell__main {
  margin-left: 72px;
}

/* Search highlight */
.sidebar__item.is-hidden,
.sidebar__section.is-hidden {
  display: none;
}

.sidebar__link-text mark,
.sidebar__sublink mark {
  background: var(--primary);
  color: var(--sidebar-bg);
  border-radius: 2px;
  padding: 0 2px;
}

/* ============================================
   Header / Topbar
   ============================================ */
.header {
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-xl);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header__left {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.header__toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

@media (max-width: 1024px) {
  .header__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

.header__title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
}

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

.header__status {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--zone-green);
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--zone-green);
}

.header__status-dot {
  width: 8px;
  height: 8px;
  background: var(--zone-green);
  border-radius: var(--radius-full);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Theme Toggle Button */
.theme-toggle {
  position: relative;
  width: 40px;
  height: 40px;
  padding: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  border-color: var(--border-light);
  color: var(--text-primary);
}

.theme-toggle:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--primary-light);
}

.theme-toggle__icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.theme-toggle__sun,
.theme-toggle__moon {
  position: absolute;
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

/* Dark mode: show moon, hide sun */
.theme-toggle__sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

.theme-toggle__moon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

/* Light mode: show sun, hide moon */
[data-theme="light"] .theme-toggle__sun {
  opacity: 1;
  transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-toggle__moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

/* ============================================
   Main Content Area
   ============================================ */
.main-content {
  flex: 1;
  padding: var(--spacing-xl);
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
}

.page-header {
  margin-bottom: var(--spacing-xl);
}

.page-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

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

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.card--glow {
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
}

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

.card__body {
  padding: var(--spacing-lg);
}

.card__footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  background: var(--bg-elevated);
}

/* ============================================
   Metric Cards
   ============================================ */
.metrics-grid {
  display: grid;
  gap: var(--spacing-lg);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-bottom: var(--spacing-xl);
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.metric-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.metric-card--green::before {
  background: var(--zone-green);
  box-shadow: 0 0 10px var(--zone-green-glow);
}

.metric-card--yellow::before {
  background: var(--zone-yellow);
  box-shadow: 0 0 10px var(--zone-yellow-glow);
}

.metric-card--red::before {
  background: var(--zone-red);
  box-shadow: 0 0 10px var(--zone-red-glow);
}

.metric-card__icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-md);
}

.metric-card__label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

.metric-card__value {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.metric-card__change {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--text-sm);
  margin-top: var(--spacing-sm);
}

.metric-card__change--positive {
  color: var(--zone-green);
}

.metric-card__change--negative {
  color: var(--zone-red);
}

/* ============================================
   Charts
   ============================================ */
.chart-container {
  position: relative;
  width: 100%;
  height: 400px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
}

.chart-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.chart-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.chart-card__actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* Custom Range Picker (SPC Charts) */
.custom-range-picker {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.custom-range-picker .form-input--sm {
  width: 180px;
}

.custom-range-picker .date-range-separator {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.custom-range-picker.hidden {
  display: none;
}

/* Zone Meter */
.zone-meter {
  display: flex;
  height: 24px;
  gap: var(--spacing-xs);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: var(--spacing-lg);
}

.zone-meter__segment {
  transition: flex var(--transition-base);
}

.zone-meter__segment--green {
  background: var(--zone-green);
  flex: 1;
}

.zone-meter__segment--yellow {
  background: var(--zone-yellow);
  flex: 0.3;
}

.zone-meter__segment--red {
  background: var(--zone-red);
  flex: 0.1;
}

.zone-legend {
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
  font-size: var(--text-sm);
}

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

.zone-legend__dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
}

.zone-legend__dot--green {
  background: var(--zone-green);
  box-shadow: 0 0 8px var(--zone-green-glow);
}

.zone-legend__dot--yellow {
  background: var(--zone-yellow);
  box-shadow: 0 0 8px var(--zone-yellow-glow);
}

.zone-legend__dot--red {
  background: var(--zone-red);
  box-shadow: 0 0 8px var(--zone-red-glow);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn--primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--text-inverse);
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

.btn--secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn--secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-light);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
}

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

.btn--danger {
  background: var(--danger);
  color: white;
}

.btn--danger:hover {
  background: #dc2626;
}

.btn--sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--text-base);
}

.btn--icon {
  width: 40px;
  height: 40px;
  padding: 0;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

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

.form-input:disabled,
.form-input.disabled,
input:disabled,
input.disabled {
  background-color: var(--bg-secondary);
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.7;
}

/* Limit field specific styling for Sigma mode (read-only) */
.limit-field.disabled {
  background-color: var(--bg-secondary);
  border-style: dashed;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-color: var(--bg-elevated);
  padding-right: 40px;
  cursor: pointer;
}

.form-select option {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  padding: var(--spacing-sm);
}

/* Light mode select styling */
[data-theme="light"] .form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
}

[data-theme="light"] .form-select option {
  background-color: #ffffff;
  color: #1e293b;
}

/* ============================================
   Tables
   ============================================ */
.table-container {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.table th {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg-elevated);
}

.table tr:hover {
  background: var(--bg-hover);
}

.table td {
  font-size: var(--text-sm);
  color: var(--text-primary);
}

.table tr.is-selected {
  background: var(--primary-light);
}

.table tr.is-active-product {
  background: rgba(16, 185, 129, 0.08);
  border-left: 3px solid var(--success);
}

.table tr.is-active-product:hover {
  background: rgba(16, 185, 129, 0.12);
}

/* Product ID cell with active badge */
.product-id-cell {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.active-product-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--success);
  color: white;
  border-radius: 4px;
}

/* ============================================
   Badges
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge--green {
  background: rgba(16, 185, 129, 0.15);
  color: var(--zone-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge--yellow {
  background: rgba(245, 158, 11, 0.15);
  color: var(--zone-yellow);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge--red {
  background: rgba(239, 68, 68, 0.15);
  color: var(--zone-red);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge--blue {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--border-glow);
}

/* ============================================
   Loading States
   ============================================ */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-elevated) 25%,
    var(--bg-hover) 50%,
    var(--bg-elevated) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================
   Utilities
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary); }
.text-success { color: var(--zone-green); }
.text-warning { color: var(--zone-yellow); }
.text-danger { color: var(--zone-red); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ============================================
   Modals
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal.hidden {
  display: none;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  animation: modalSlideIn 0.2s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-content--sm {
  max-width: 400px;
}

.modal-content--lg {
  max-width: 700px;
}

.modal-content--xl {
  max-width: 900px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-elevated);
}

.modal-header h2 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
}

.modal-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.modal-tab {
  padding: var(--spacing-md) var(--spacing-lg);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

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

.modal-tab.is-active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: var(--bg-card);
}

.modal-tab-content {
  display: none;
}

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

.modal-body {
  padding: var(--spacing-lg);
  max-height: 60vh;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  background: var(--bg-elevated);
}

/* ============================================
   Comments Side Panel
   ============================================ */
.comments-panel {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  justify-content: flex-end;
}

.comments-panel.hidden {
  display: none;
}

.comments-panel__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.comments-panel__content {
  position: relative;
  width: 400px;
  max-width: 100%;
  height: 100%;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  box-shadow: -4px 0 12px rgba(0, 0, 0, 0.15);
  animation: slideInRight 0.2s ease-out;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

.comments-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-elevated);
}

.comments-panel__title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.comments-panel__subheader {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.comments-record-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-sm);
}

.comments-panel__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.comments-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
}

.comments-empty svg {
  opacity: 0.3;
  margin-bottom: var(--spacing-md);
}

.comment-item {
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.comment-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.comment-author {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.comment-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.comment-edited {
  font-style: italic;
}

.comment-text {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.comment-actions {
  display: flex;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.comment-item:hover .comment-actions {
  opacity: 1;
}

.comment-action-btn {
  padding: 2px 6px;
  font-size: var(--text-xs);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

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

.comment-action-btn--delete:hover {
  color: var(--danger);
}

.comments-panel__footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  background: var(--bg-elevated);
}

.comments-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.comments-input-group {
  display: flex;
  gap: var(--spacing-sm);
  align-items: flex-end;
}

.comments-textarea {
  flex: 1;
  resize: none;
  min-height: 60px;
}

.comment-btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xs);
  min-width: 32px;
  height: 32px;
  cursor: pointer;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.comment-btn-icon:hover {
  background: var(--bg-secondary);
  color: var(--primary);
}

/* Comment count badge in data table */
.comment-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: var(--text-xs);
  font-weight: 500;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.comment-count:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.comment-count.has-comments {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

.comment-count.has-comments:hover {
  background: var(--primary);
  color: white;
}

/* Form enhancements for modals */
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
}

.radio-group,
.checkbox-group {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.radio-label,
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.form-hint {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.section-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--spacing-lg) 0 var(--spacing-md) 0;
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.section-title:first-child {
  margin-top: 0;
}

/* Limit Source Options (Tags) */
.limit-source-options {
  display: flex;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.limit-source-options .radio-label {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.limit-source-options .radio-label:hover {
  border-color: var(--primary);
  background: var(--bg-hover);
}

.limit-source-options input[type="radio"]:checked + span,
.limit-source-options input[type="radio"]:checked ~ span {
  color: var(--primary);
}

/* Product Cell Preview */
.product-cell-preview {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.cell-preview-values {
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.cell-preview-values span {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
}

#preview-usl {
  color: var(--zone-red);
}

#preview-target {
  color: var(--zone-green);
}

#preview-lsl {
  color: var(--zone-red);
}

/* Detected Cell Display */
.detected-cell-display {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-xs);
}

.detected-cell-display .badge {
  font-size: var(--text-base);
  padding: var(--spacing-xs) var(--spacing-md);
}

/* Confirmation modal styling */
.modal-confirm-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  font-size: 2rem;
}

.modal-confirm-icon--danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

.modal-confirm-icon--warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

.modal-confirm-icon--info {
  background: var(--primary-light);
  color: var(--primary);
}

.modal-confirm-text {
  text-align: center;
}

.modal-confirm-text h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.modal-confirm-text p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

/* Permission tags for role management */
.permission-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.permission-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.8125rem;
}

.permission-item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.permission-item.selected,
.permission-item:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
}

.permission-item input[type="checkbox"] {
  accent-color: var(--primary);
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.permission-item span {
  line-height: 1.3;
}

.permission-category {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-xs);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--border-color);
}

.permission-category:first-child {
  margin-top: 0;
}

/* Toast notifications */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  animation: toastSlideIn 0.3s ease-out;
  min-width: 300px;
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast--success {
  border-left: 4px solid var(--success);
}

.toast--error {
  border-left: 4px solid var(--danger);
}

.toast--warning {
  border-left: 4px solid var(--warning);
}

.toast--info {
  border-left: 4px solid var(--info);
}

.toast__message {
  flex: 1;
  font-size: var(--text-sm);
}

.toast__close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--spacing-xs);
  font-size: var(--text-lg);
}

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

/* ============================================
   SPC Data Table Styles
   ============================================ */
.data-table-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 500px;
}

.data-table-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.data-table-header h3 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.data-table-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.data-table-wrapper {
  flex: 1;
  overflow: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.data-table thead {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg-elevated);
}

.data-table th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: center;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}

.data-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.data-table tbody tr {
  transition: background-color var(--transition-fast);
}

.data-table tbody tr:hover {
  background: var(--bg-hover);
}

.data-table tbody tr:nth-child(even) {
  background: var(--bg-subtle);
}

.data-table tbody tr:nth-child(even):hover {
  background: var(--bg-hover);
}

.data-table__col-index {
  width: 60px;
  text-align: center;
}

.data-table__col-timestamp {
  width: 180px;
}

.data-table__col-line {
  width: 120px;
}

.data-table__col-product {
  width: 150px;
}

.data-table__col-value {
  width: 100px;
  text-align: center;
}

.data-table__col-status {
  width: 100px;
  text-align: center;
}

.data-table__col-comments {
  width: 90px;
  text-align: center;
}

.data-table td.data-table__col-comments {
  text-align: center;
}

.data-table td.data-table__col-index {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-xs);
}

.data-table td.data-table__col-value {
  text-align: center;
  font-family: var(--font-mono);
  font-weight: 500;
}

.data-table td.data-table__col-status {
  text-align: center;
}

.data-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.data-status--ok {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
}

.data-status--warning {
  background: rgba(234, 179, 8, 0.15);
  color: var(--warning);
}

.data-status--alarm {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

/* Value color classes for zone indication */
.data-value--red {
  color: var(--danger) !important;
  font-weight: 600;
}

.data-value--yellow {
  color: var(--warning) !important;
  font-weight: 600;
}

/* New columns for SPC data table */
.data-table__col-mode {
  width: 70px;
  text-align: center;
}

.data-table__col-limit {
  width: 80px;
  text-align: center;
  font-family: var(--font-mono);
}

/* Center align all data table cells */
.data-table th,
.data-table td {
  text-align: center;
}

/* Override specific columns that need different alignment */
.data-table__col-timestamp {
  text-align: center;
}

.data-table-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.data-table-info {
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.data-table-pagination {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.pagination-rows {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.pagination-select {
  width: auto;
  min-width: 70px;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--text-sm);
}

.pagination-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.pagination-btn {
  min-width: 36px;
  height: 36px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  font-weight: 600;
}

.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination-current {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  padding: 0 var(--spacing-sm);
  white-space: nowrap;
}

.pagination-current span {
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================================
   Time Range Buttons
   ============================================ */
.time-range-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.time-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

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

.time-btn.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ============================================
   Dashboard Summary Cards (shared component)
   ============================================ */
.dashboard-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.summary-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--surface-elevated, var(--bg-card, #1a1f2e));
  border: 1px solid var(--border-primary, var(--border-color, #2d3548));
  border-radius: 8px;
  transition: all 0.2s ease;
}

.summary-card:hover {
  box-shadow: 0 4px 12px var(--shadow-md, rgba(0,0,0,0.2));
}

.summary-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  flex-shrink: 0;
}

.summary-card--total .summary-card__icon {
  background: var(--status-info-light, rgba(59,130,246,0.15));
  color: var(--status-info, #3b82f6);
}

.summary-card--success .summary-card__icon {
  background: var(--status-success-light, rgba(16,185,129,0.15));
  color: var(--status-success, #10b981);
}

.summary-card--warning .summary-card__icon {
  background: var(--status-warning-light, rgba(245,158,11,0.15));
  color: var(--status-warning, #f59e0b);
}

.summary-card--danger .summary-card__icon {
  background: var(--status-error-light, rgba(239,68,68,0.15));
  color: var(--status-error, #ef4444);
}

.summary-card--info .summary-card__icon {
  background: var(--status-info-light, rgba(59,130,246,0.15));
  color: var(--status-info, #3b82f6);
}

.summary-card__content {
  flex: 1;
  min-width: 0;
}

.summary-card__value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.summary-card__label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ============================================
   Filters Bar (shared component)
   ============================================ */
.filters-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border-primary, var(--border-color, #2d3548));
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.filter-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   Tabs (shared component)
   ============================================ */
.tabs-container {
  margin-bottom: 1.5rem;
}

.tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-primary, var(--border-color, #2d3548));
  padding-bottom: 0;
  overflow-x: auto;
}

.tab {
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: -1px;
  white-space: nowrap;
}

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

.tab.is-active {
  color: var(--brand-primary, var(--primary, #00d4ff));
  border-bottom-color: var(--brand-primary, var(--primary, #00d4ff));
}

.tab-content {
  display: none;
}

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

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
  }

  .main-content {
    padding: var(--spacing-md);
  }

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

  .dashboard-summary {
    grid-template-columns: repeat(2, 1fr);
  }

  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .chart-container {
    height: 300px;
  }
}

@media (max-width: 480px) {
  .dashboard-summary {
    grid-template-columns: 1fr;
  }

  .filters-bar {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ============================================
   Accessibility (WCAG 2.1 Compliance)
   ============================================ */

/* Screen Reader Only - Visually hidden but accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Make sr-only visible when focused (for skip links) */
.sr-only-focusable:focus,
.sr-only-focusable:active {
  position: static;
  width: auto;
  height: auto;
  padding: inherit;
  margin: inherit;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Skip Link - Bypass navigation */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--primary);
  color: var(--text-inverse);
  padding: var(--spacing-sm) var(--spacing-md);
  z-index: 10000;
  text-decoration: none;
  font-weight: 600;
  border-radius: 0 0 var(--radius-md) 0;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
}

/* Enhanced Focus Indicators */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Button Focus States */
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--primary-light);
}

.btn--primary:focus-visible {
  outline-color: var(--text-primary);
}

/* Form Input Focus Enhancement */
.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}

/* Link Focus States */
a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Sidebar Link Focus */
.sidebar__link:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
  background: var(--bg-hover);
}

/* Modal Focus Trap Indicator */
.modal:focus-visible {
  outline: none;
}

.modal-content:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ARIA Live Region Announcer */
#a11y-announcer,
#a11y-alert {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --text-muted: #a0aec0;
    --border-color: var(--text-primary);
    --bg-hover: rgba(255, 255, 255, 0.1);
  }

  .btn {
    border: 2px solid currentColor;
  }

  .form-input,
  .form-select {
    border-width: 2px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .skip-link {
    transition: none;
  }
}

/* Status Icons with Text Fallback */
.status-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25em;
  height: 1.25em;
  margin-right: var(--spacing-xs);
  font-size: 0.875em;
}

/* Table Accessibility Enhancement */
table caption.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}