/**
 * Liquid Glass UI Framework
 * SeeTran GPU Cluster - Synology DSM Inspired
 *
 * Design: Frosted glass with depth, cyan/teal accent, animated gradients
 */

/* ============================================
   CSS Variables / Design Tokens
   ============================================ */
:root {
  /* Background Colors */
  --bg-deep: #080810;
  --bg-surface: #0c0c14;
  --bg-glass: rgba(20, 20, 35, 0.7);
  --bg-glass-light: rgba(255, 255, 255, 0.03);
  --bg-glass-hover: rgba(255, 255, 255, 0.06);

  /* Accent Colors - Cyan/Teal */
  --accent-primary: #06b6d4;
  --accent-secondary: #0891b2;
  --accent-light: #22d3ee;
  --accent-glow: rgba(6, 182, 212, 0.3);
  --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);

  /* Status Colors */
  --status-success: #10b981;
  --status-success-bg: rgba(16, 185, 129, 0.15);
  --status-warning: #f59e0b;
  --status-warning-bg: rgba(245, 158, 11, 0.15);
  --status-danger: #ef4444;
  --status-danger-bg: rgba(239, 68, 68, 0.15);
  --status-info: #3b82f6;
  --status-info-bg: rgba(59, 130, 246, 0.15);

  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-disabled: #475569;

  /* Border Colors */
  --border-glass: rgba(255, 255, 255, 0.1);
  --border-glass-strong: rgba(255, 255, 255, 0.18);
  --border-accent: rgba(6, 182, 212, 0.5);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px var(--accent-glow);

  /* Spacing */
  --sidebar-width: 260px;
  --sidebar-collapsed: 70px;
  --header-height: 60px;
  --border-radius: 16px;
  --border-radius-sm: 10px;
  --border-radius-lg: 24px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Z-index layers */
  --z-sidebar: 100;
  --z-header: 110;
  --z-modal: 200;
  --z-toast: 300;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated Gradient Background */
.animated-bg {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    -45deg,
    #080810,
    #0a1018,
    #0c0c18,
    #08101a,
    #080810
  );
  background-size: 400% 400%;
  animation: gradient-shift 20s ease infinite;
  z-index: -1;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  25% { background-position: 50% 100%; }
  50% { background-position: 100% 50%; }
  75% { background-position: 50% 0%; }
}

/* Optional: Floating particles overlay */
.particles-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.5;
}

/* ============================================
   Liquid Glass Effects
   ============================================ */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-md);
}

.glass-light {
  background: var(--bg-glass-light);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  border: 1px solid var(--border-glass);
}

.glass-strong {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0.05) 100%
  );
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border: 1px solid var(--border-glass-strong);
  box-shadow:
    var(--shadow-lg),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.glass-card {
  background: var(--bg-glass-light);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius);
  padding: 24px;
  transition: all var(--transition-normal);
}

.glass-card:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-glass-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Inner glow effect */
.glass-glow {
  position: relative;
}

.glass-glow::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
}

/* ============================================
   Layout - Sidebar
   ============================================ */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-right: 1px solid var(--border-glass);
  z-index: var(--z-sidebar);
  display: flex;
  flex-direction: column;
  transition: width var(--transition-normal);
  overflow: hidden;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed);
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 80px;
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  background: var(--accent-gradient);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-glow);
}

.sidebar-logo svg {
  width: 24px;
  height: 24px;
  color: white;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-title {
  opacity: 0;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  padding: 8px 12px;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.collapsed .nav-section-title {
  opacity: 0;
  height: 0;
  padding: 0;
  margin: 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--border-radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  margin-bottom: 4px;
  cursor: pointer;
}

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

.nav-item.active {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2) 0%, rgba(8, 145, 178, 0.1) 100%);
  color: var(--accent-light);
  border: 1px solid var(--border-accent);
}

.nav-item svg,
.nav-item i {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-item span {
  white-space: nowrap;
  overflow: hidden;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .nav-item span {
  opacity: 0;
  width: 0;
}

.sidebar.collapsed .nav-item {
  justify-content: center;
  padding: 12px;
}

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid var(--border-glass);
}

.sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--border-radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
  background: none;
  border: none;
}

.sidebar-toggle:hover {
  background: var(--bg-glass-hover);
  color: var(--text-secondary);
}

.sidebar-toggle svg {
  transition: transform var(--transition-normal);
}

.sidebar.collapsed .sidebar-toggle svg {
  transform: rotate(180deg);
}

/* ============================================
   Layout - Main Content
   ============================================ */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  transition: margin-left var(--transition-normal);
}

.sidebar.collapsed + .main-content,
.main-content.sidebar-collapsed {
  margin-left: var(--sidebar-collapsed);
}

.content-header {
  position: sticky;
  top: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  padding: 16px 32px;
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
}

.content-title {
  font-size: 20px;
  font-weight: 600;
}

.content-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.content-body {
  padding: 32px;
  max-width: 1600px;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--border-radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

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

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

.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.btn-outline:hover {
  background: rgba(6, 182, 212, 0.1);
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 12px;
}

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

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--border-radius-sm);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ============================================
   Status Badges
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
}

.badge-success {
  background: var(--status-success-bg);
  color: var(--status-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-warning {
  background: var(--status-warning-bg);
  color: var(--status-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-danger {
  background: var(--status-danger-bg);
  color: var(--status-danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-info {
  background: var(--status-info-bg);
  color: var(--status-info);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

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

.badge-success .status-dot {
  box-shadow: 0 0 8px var(--status-success);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.15); }
}

/* ============================================
   Cards & Widgets
   ============================================ */
.card {
  background: var(--bg-glass-light);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title::before {
  content: '';
  width: 3px;
  height: 16px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.card-body {
  padding: 20px;
}

.card-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-glass);
  background: rgba(0, 0, 0, 0.2);
}

/* Stat Widget */
.stat-widget {
  background: var(--bg-glass-light);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius);
  padding: 24px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-widget:hover {
  background: var(--bg-glass-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-widget::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.stat-widget:hover::before {
  opacity: 1;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-primary);
}

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

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-change {
  font-size: 12px;
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.stat-change.positive { color: var(--status-success); }
.stat-change.negative { color: var(--status-danger); }

/* ============================================
   Progress Bars
   ============================================ */
.progress {
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 100px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: 100px;
  transition: width var(--transition-slow);
  background: var(--accent-gradient);
}

.progress-bar.success { background: linear-gradient(90deg, #10b981, #34d399); }
.progress-bar.warning { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.progress-bar.danger { background: linear-gradient(90deg, #ef4444, #f87171); }

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-glass-light);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  transition: all var(--transition-fast);
}

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

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: rgba(255, 255, 255, 0.05);
}

.form-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

/* ============================================
   Tables
   ============================================ */
.table-container {
  overflow-x: auto;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-glass);
}

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

.table th {
  text-align: left;
  padding: 14px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-glass);
}

.table td {
  padding: 14px 16px;
  font-size: 14px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-glass);
}

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

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

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================
   Modals
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.modal {
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border-glass-strong);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-normal);
}

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

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: none;
  border: none;
}

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

.modal-body {
  padding: 24px;
  overflow-y: auto;
  max-height: calc(90vh - 140px);
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-glass);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  background: rgba(0, 0, 0, 0.2);
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-sm);
  padding: 16px 20px;
  min-width: 300px;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  animation: toast-in 0.3s ease;
}

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

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100px);
  }
}

.toast-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  margin-bottom: 4px;
}

.toast-message {
  font-size: 13px;
  color: var(--text-secondary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}

.toast.success { border-left: 3px solid var(--status-success); }
.toast.warning { border-left: 3px solid var(--status-warning); }
.toast.error { border-left: 3px solid var(--status-danger); }
.toast.info { border-left: 3px solid var(--status-info); }

.toast.success .toast-icon { color: var(--status-success); }
.toast.warning .toast-icon { color: var(--status-warning); }
.toast.error .toast-icon { color: var(--status-danger); }
.toast.info .toast-icon { color: var(--status-info); }

/* ============================================
   Status Banner
   ============================================ */
.status-banner {
  padding: 16px 24px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.status-banner.healthy {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(16, 185, 129, 0.05) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-banner.warning {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(245, 158, 11, 0.05) 100%);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-banner.critical {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(239, 68, 68, 0.05) 100%);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-banner-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.status-banner.healthy .status-banner-icon {
  background: rgba(16, 185, 129, 0.2);
  color: var(--status-success);
}

.status-banner.warning .status-banner-icon {
  background: rgba(245, 158, 11, 0.2);
  color: var(--status-warning);
}

.status-banner.critical .status-banner-icon {
  background: rgba(239, 68, 68, 0.2);
  color: var(--status-danger);
}

.status-banner-text {
  flex: 1;
}

.status-banner-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 2px;
}

.status-banner-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ============================================
   Worker Cards
   ============================================ */
.worker-card {
  background: var(--bg-glass-light);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius);
  padding: 24px;
  transition: all var(--transition-normal);
  position: relative;
}

.worker-card:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-glass-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.worker-card.online::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--status-success), #34d399);
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.worker-card.offline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--status-danger);
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.worker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.worker-name {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.worker-gpu {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.worker-metrics {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.worker-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.worker-metric-header {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
}

.worker-metric-label {
  color: var(--text-secondary);
}

.worker-metric-value {
  color: var(--text-primary);
  font-weight: 500;
}

.worker-actions {
  display: flex;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-glass);
}

/* ============================================
   Grid Layouts
   ============================================ */
.grid {
  display: grid;
  gap: 24px;
}

.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); }

@media (max-width: 1200px) {
  .grid-cols-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 992px) {
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-cols-4,
  .grid-cols-3,
  .grid-cols-2 { grid-template-columns: 1fr; }
}

/* ============================================
   Responsive / Mobile
   ============================================ */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 100%;
  }

  .sidebar {
    transform: translateX(-100%);
    width: 280px;
  }

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

  .main-content {
    margin-left: 0;
  }

  .content-body {
    padding: 16px;
  }

  .stat-value {
    font-size: 24px;
  }

  .modal {
    max-width: calc(100% - 40px);
    margin: 20px;
  }
}

/* Mobile menu toggle */
.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass-light);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  cursor: pointer;
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--status-success); }
.text-warning { color: var(--status-warning); }
.text-danger { color: var(--status-danger); }

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-5 { margin-top: 24px; }

.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-5 { margin-bottom: 24px; }

.p-1 { padding: 4px; }
.p-2 { padding: 8px; }
.p-3 { padding: 12px; }
.p-4 { padding: 16px; }
.p-5 { padding: 24px; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }

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

/* Loading spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-glass);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Skeleton loading */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-glass-light) 25%,
    var(--bg-glass-hover) 50%,
    var(--bg-glass-light) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease infinite;
  border-radius: 4px;
}

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