/* ============================================
   SADM Design System v2.0
   Modern, professional infrastructure management
   ============================================ */

/* ============================================
   VARIABLES & TOKENS
   ============================================ */
:root {
  /* Color Palette - Professional Infrastructure Theme */
  --color-primary: #0066FF;
  --color-primary-dark: #0052CC;
  --color-primary-light: #3385FF;
  --color-primary-subtle: #E6F0FF;
  
  --color-secondary: #6366F1;
  --color-secondary-dark: #4F46E5;
  
  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  --color-warning: #F59E0B;
  --color-warning-light: #FEF3C7;
  --color-danger: #EF4444;
  --color-danger-light: #FEE2E2;
  --color-info: #3B82F6;
  --color-info-light: #DBEAFE;
  
  /* Neutrals */
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  
  /* Background */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --bg-tertiary: #F3F4F6;
  --bg-accent: #F0F4FF;
  
  /* Text */
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  --text-inverse: #FFFFFF;
  
  /* Borders */
  --border-color: #E5E7EB;
  --border-color-strong: #D1D5DB;
  --border-color-subtle: #F3F4F6;
  
  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  --font-display: 'Poppins', var(--font-sans);
  
  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  
  /* Spacing */
  --space-1: 0.25rem;      /* 4px */
  --space-2: 0.5rem;       /* 8px */
  --space-3: 0.75rem;      /* 12px */
  --space-4: 1rem;         /* 16px */
  --space-5: 1.25rem;      /* 20px */
  --space-6: 1.5rem;       /* 24px */
  --space-8: 2rem;         /* 32px */
  --space-10: 2.5rem;      /* 40px */
  --space-12: 3rem;        /* 48px */
  --space-16: 4rem;        /* 64px */
  
  /* Border Radius */
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 72px;
  --header-height: 64px;
  --container-max: 1440px;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::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: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-secondary);
  overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--text-4xl); font-weight: 700; }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

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

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

code, pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

code {
  background: var(--bg-tertiary);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  color: var(--color-secondary);
}

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

.app-sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), width var(--transition-base);
  z-index: 100;
}

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

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

.app-sidebar.collapsed ~ .app-main {
  margin-left: var(--sidebar-collapsed-width);
}

.app-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  gap: var(--space-4);
  z-index: 50;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.95);
}

.app-content {
  flex: 1;
  padding: var(--space-6);
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
}

/* ============================================
   SIDEBAR COMPONENTS
   ============================================ */
.sidebar-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  border-bottom: 1px solid var(--border-color);
  gap: var(--space-3);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--text-primary);
  white-space: nowrap;
}

.sidebar-logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--text-lg);
  flex-shrink: 0;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
}

.sidebar-nav-section {
  margin-bottom: var(--space-6);
}

.sidebar-nav-title {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  padding: 0 var(--space-3);
  margin-bottom: var(--space-2);
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}

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

.sidebar-nav-item.active {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
}

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

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

.sidebar-nav-badge {
  background: var(--color-primary);
  color: white;
  font-size: var(--text-xs);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--border-color);
}

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

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

.sidebar-user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.sidebar-user-info {
  flex: 1;
  overflow: hidden;
}

.sidebar-user-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.sidebar-toggle {
  position: absolute;
  right: -12px;
  top: 32px;
  width: 24px;
  height: 24px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
}

.sidebar-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transform: scale(1.1);
}

/* Collapsed State */
.app-sidebar.collapsed .sidebar-logo-text,
.app-sidebar.collapsed .sidebar-nav-label,
.app-sidebar.collapsed .sidebar-nav-title,
.app-sidebar.collapsed .sidebar-nav-badge,
.app-sidebar.collapsed .sidebar-user-info {
  display: none;
}

.app-sidebar.collapsed .sidebar-header,
.app-sidebar.collapsed .sidebar-nav,
.app-sidebar.collapsed .sidebar-footer {
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.app-sidebar.collapsed .sidebar-nav-item {
  justify-content: center;
  padding: var(--space-3);
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

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

.card-footer {
  padding: var(--space-5) var(--space-6);
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

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

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-200);
}

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

.btn-success:hover:not(:disabled) {
  background: #0EA674;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-danger:hover:not(:disabled) {
  background: #DC2626;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
}

.btn-icon {
  padding: var(--space-3);
  width: 36px;
  height: 36px;
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
  padding: var(--space-2);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-label-optional {
  color: var(--text-tertiary);
  font-weight: 400;
  margin-left: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

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

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

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-help {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin-top: var(--space-2);
}

.form-error {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-danger);
  margin-top: var(--space-2);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-danger);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px var(--color-danger-light);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.form-row-3 {
  grid-template-columns: repeat(3, 1fr);
}

.form-row-4 {
  grid-template-columns: repeat(4, 1fr);
}

.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.form-checkbox input,
.form-radio input {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

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

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-primary);
}

.table th {
  background: var(--bg-secondary);
  padding: var(--space-4) var(--space-4);
  text-align: left;
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.table td {
  padding: var(--space-4) var(--space-4);
  border-bottom: 1px solid var(--border-color-subtle);
  font-size: var(--text-sm);
  color: var(--text-primary);
}

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

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

.table-cell-nowrap {
  white-space: nowrap;
}

.table-cell-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

/* ============================================
   BADGES & TAGS
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.25rem 0.625rem;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-primary-subtle);
  color: var(--color-primary-dark);
}

.badge-success {
  background: var(--color-success-light);
  color: #065F46;
}

.badge-warning {
  background: var(--color-warning-light);
  color: #92400E;
}

.badge-danger {
  background: var(--color-danger-light);
  color: #991B1B;
}

.badge-info {
  background: var(--color-info-light);
  color: #1E40AF;
}

.badge-gray {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid;
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

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

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.alert-message {
  font-size: var(--text-sm);
}

.alert-success {
  background: var(--color-success-light);
  border-color: var(--color-success);
  color: #065F46;
}

.alert-warning {
  background: var(--color-warning-light);
  border-color: var(--color-warning);
  color: #92400E;
}

.alert-danger {
  background: var(--color-danger-light);
  border-color: var(--color-danger);
  color: #991B1B;
}

.alert-info {
  background: var(--color-info-light);
  border-color: var(--color-info);
  color: #1E40AF;
}

/* ============================================
   STATS CARDS
   ============================================ */
.stat-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: all var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.stat-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.stat-card-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-subtle);
  color: var(--color-primary);
}

.stat-card-value {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.stat-card-footer {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.stat-card-trend {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 600;
}

.stat-card-trend.positive {
  color: var(--color-success);
}

.stat-card-trend.negative {
  color: var(--color-danger);
}

/* ============================================
   DETAILS/ACCORDION
   ============================================ */
details {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  overflow: hidden;
}

summary {
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  user-select: none;
  transition: background var(--transition-fast);
}

summary:hover {
  background: var(--bg-secondary);
}

summary::marker {
  display: none;
}

summary::before {
  content: '›';
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  text-align: center;
  line-height: 20px;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

details[open] summary::before {
  transform: rotate(90deg);
}

details[open] summary {
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

details .details-content {
  padding: var(--space-5);
}

/* ============================================
   UTILITIES
   ============================================ */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

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

.text-right {
  text-align: right;
}

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

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

.text-xs {
  font-size: var(--text-xs);
}

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

.text-tertiary {
  color: var(--text-tertiary);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .app-sidebar {
    transform: translateX(-100%);
  }
  
  .app-sidebar.mobile-open {
    transform: translateX(0);
  }
  
  .app-main {
    margin-left: 0;
  }
  
  .form-row,
  .form-row-3,
  .form-row-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --space-6: 1rem;
  }
  
  .app-content {
    padding: var(--space-4);
  }
  
  .card-body {
    padding: var(--space-4);
  }
  
  .table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

.slide-in {
  animation: slideIn 0.3s ease-out;
}

/* ============================================
   LOADING STATES
   ============================================ */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 25%,
    var(--color-gray-100) 50%,
    var(--color-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

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

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

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

/* ============================================
   MODAL / DIALOG
   ============================================ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

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

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  z-index: 1001;
  width: 90%;
  max-width: 560px;
  max-height: 90vh;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

.modal.modal-wide {
  max-width: 800px;
}

.modal.modal-full {
  max-width: 1100px;
  width: 95%;
}

.modal.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.modal-close:hover {
  background: var(--color-gray-200);
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  max-height: calc(90vh - 140px);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

/* Empty State */
.empty-state {
  padding: 3rem;
  text-align: center;
  color: var(--text-secondary);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  opacity: 0.4;
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.empty-state-text {
  font-size: var(--text-sm);
  margin-bottom: 1.5rem;
}

/* Page Header with Actions */
.page-header-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-header-actions h2 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Clickable table rows */
.table tbody tr.clickable {
  cursor: pointer;
}

.table tbody tr.clickable:hover {
  background: var(--color-primary-subtle);
}

/* Action buttons in table */
.table-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

/* Toast notifications */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--color-info);
  animation: slideInRight 0.3s ease;
}

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

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