/**
 * SentryNix Modern UI/UX Design System
 * Professional, Beautiful, Responsive Security Platform Interface
 */

/* ============================================
   Design Tokens & CSS Variables
   ============================================ */
:root {
  /* Primary Brand Colors */
  --primary-blue: #0066FF;
  --primary-dark: #0047B3;
  --primary-light: #3385FF;

  /* Security Status Colors */
  --critical-red: #FF3B30;
  --high-orange: #FF9500;
  --medium-yellow: #FFCC00;
  --low-green: #34C759;
  --info-blue: #007AFF;

  /* Neutral Colors */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F7FA;
  --bg-tertiary: #E8ECF1;
  --text-primary: #1C1C1E;
  --text-secondary: #636366;
  --text-tertiary: #8E8E93;
  --border-color: #D1D1D6;

  /* Dark Mode Colors */
  --dark-bg-primary: #1C1C1E;
  --dark-bg-secondary: #2C2C2E;
  --dark-bg-tertiary: #3A3A3C;
  --dark-text-primary: #FFFFFF;
  --dark-text-secondary: #AEAEB2;
  --dark-border: #38383A;

  /* Shadows & Effects */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

  /* 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: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Courier New', monospace;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* ============================================
   Global Styles & Reset
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-secondary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Sidebar Navigation */
.sidebar {
  width: 260px;
  background: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
  transition: transform var(--transition-base);
}

.sidebar-header {
  padding: var(--spacing-xl) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-blue);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 24px;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-lg) 0;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: var(--spacing-xl);
}

.nav-section-title {
  padding: 0 var(--spacing-lg);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-sm);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

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

.nav-item.active {
  background: var(--bg-secondary);
  color: var(--primary-blue);
  font-weight: 600;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.nav-icon {
  font-size: 20px;
  width: 24px;
  text-align: center;
}

.nav-badge {
  margin-left: auto;
  background: var(--critical-red);
  color: white;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
}

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

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

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

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
}

.user-info {
  flex: 1;
}

.user-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.user-role {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Main Content Area */
.main-content {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
}

.top-bar {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.page-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

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

.search-bar {
  position: relative;
}

.search-input {
  width: 300px;
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 40px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 14px;
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
}

.icon-button {
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

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

.icon-button .badge {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--critical-red);
  border: 2px solid var(--bg-primary);
  border-radius: var(--radius-full);
}

/* Content Container */
.content {
  padding: var(--spacing-xl);
  flex: 1;
}

/* ============================================
   Dashboard Grid & Cards
   ============================================ */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

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

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

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.stat-icon.critical {
  background: rgba(255, 59, 48, 0.1);
  color: var(--critical-red);
}

.stat-icon.high {
  background: rgba(255, 149, 0, 0.1);
  color: var(--high-orange);
}

.stat-icon.medium {
  background: rgba(255, 204, 0, 0.1);
  color: var(--medium-yellow);
}

.stat-icon.low {
  background: rgba(52, 199, 89, 0.1);
  color: var(--low-green);
}

.stat-icon.info {
  background: rgba(0, 122, 255, 0.1);
  color: var(--info-blue);
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.stat-trend {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 12px;
  font-weight: 600;
}

.stat-trend.up {
  color: var(--critical-red);
}

.stat-trend.down {
  color: var(--low-green);
}

/* ============================================
   Charts & Visualizations
   ============================================ */
.chart-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-xl);
}

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

.chart-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

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

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

/* ============================================
   Alerts & Notifications
   ============================================ */
.alerts-list {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

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

.alerts-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.alert-item {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  transition: background var(--transition-fast);
  cursor: pointer;
}

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

.alert-item:last-child {
  border-bottom: none;
}

.alert-severity {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  margin-top: 8px;
  flex-shrink: 0;
}

.alert-severity.critical {
  background: var(--critical-red);
  box-shadow: 0 0 8px var(--critical-red);
}

.alert-severity.high {
  background: var(--high-orange);
}

.alert-severity.medium {
  background: var(--medium-yellow);
}

.alert-severity.low {
  background: var(--low-green);
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.alert-description {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.alert-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 12px;
  color: var(--text-tertiary);
}

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

/* ============================================
   Buttons & Controls
   ============================================ */
.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow-md);
}

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

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

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

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

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 12px;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 16px;
}

/* ============================================
   Badges & Tags
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}

.badge-critical {
  background: rgba(255, 59, 48, 0.1);
  color: var(--critical-red);
}

.badge-high {
  background: rgba(255, 149, 0, 0.1);
  color: var(--high-orange);
}

.badge-medium {
  background: rgba(255, 204, 0, 0.1);
  color: var(--medium-yellow);
}

.badge-low {
  background: rgba(52, 199, 89, 0.1);
  color: var(--low-green);
}

.badge-info {
  background: rgba(0, 122, 255, 0.1);
  color: var(--info-blue);
}

/* ============================================
   Tables
   ============================================ */
.table-container {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

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

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

.table th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-tertiary);
}

.table td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-primary);
}

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

/* ============================================
   Dark Mode
   ============================================ */
body.dark-mode {
  background: var(--dark-bg-secondary);
  color: var(--dark-text-primary);
}

.dark-mode .sidebar,
.dark-mode .top-bar,
.dark-mode .stat-card,
.dark-mode .chart-card,
.dark-mode .alerts-list,
.dark-mode .table-container {
  background: var(--dark-bg-primary);
  border-color: var(--dark-border);
}

.dark-mode .nav-item:hover,
.dark-mode .nav-item.active {
  background: var(--dark-bg-tertiary);
}

.dark-mode .user-profile:hover {
  background: var(--dark-bg-tertiary);
}

.dark-mode .search-input {
  background: var(--dark-bg-tertiary);
  border-color: var(--dark-border);
  color: var(--dark-text-primary);
}

.dark-mode .icon-button:hover {
  background: var(--dark-bg-tertiary);
}

.dark-mode .alert-item:hover {
  background: var(--dark-bg-tertiary);
}

.dark-mode .table thead {
  background: var(--dark-bg-tertiary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

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

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

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

  .search-input {
    width: 200px;
  }
}

@media (max-width: 768px) {
  .content {
    padding: var(--spacing-md);
  }

  .top-bar {
    padding: var(--spacing-md);
  }

  .page-title {
    font-size: 20px;
  }

  .search-bar {
    display: none;
  }
}

/* ============================================
   Animations
   ============================================ */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* ============================================
   Filters & Forms
   ============================================ */
.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.filter-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-select {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

/* ============================================
   Data Tables
   ============================================ */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table thead {
  background: var(--bg-secondary);
}

.data-table th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-tertiary);
  border-bottom: 2px solid var(--border-color);
}

.data-table td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-primary);
}

.data-table .table-row {
  transition: background var(--transition-fast);
  cursor: pointer;
}

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

.scan-name {
  display: flex;
  align-items: center;
  font-weight: 600;
}

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-badge.status-running {
  background: rgba(0, 122, 255, 0.1);
  color: var(--info-blue);
}

.status-badge.status-completed {
  background: rgba(52, 199, 89, 0.1);
  color: var(--low-green);
}

.status-badge.status-pending {
  background: rgba(255, 204, 0, 0.1);
  color: var(--medium-yellow);
}

.status-badge.status-failed {
  background: rgba(255, 59, 48, 0.1);
  color: var(--critical-red);
}

/* Progress Bars */
.progress-bar {
  width: 100px;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
  margin-right: var(--spacing-sm);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-blue), var(--primary-light));
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.progress-fill.failed {
  background: var(--critical-red);
}

.progress-text {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 600;
}

/* Findings Badge */
.findings-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.findings-badge.critical {
  color: var(--critical-red);
}

.findings-badge.high {
  color: var(--high-orange);
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: var(--spacing-xs);
}

.btn-icon {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

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

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

.pagination-info {
  font-size: 14px;
  color: var(--text-secondary);
}

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

/* ============================================
   Alert Tabs & Advanced Alerts
   ============================================ */
.filter-tabs {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.filter-tab {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

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

.filter-tab.active {
  background: var(--primary-blue);
  color: white;
  border-color: var(--primary-blue);
}

.tab-count {
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}

.filter-tab.active .tab-count {
  background: rgba(255, 255, 255, 0.3);
}

.severity-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  display: inline-block;
}

.severity-dot.critical {
  background: var(--critical-red);
  box-shadow: 0 0 8px var(--critical-red);
}

.severity-dot.high {
  background: var(--high-orange);
}

.severity-dot.medium {
  background: var(--medium-yellow);
}

.severity-dot.low {
  background: var(--low-green);
}

/* Alert Header Row */
.alert-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
}

.alert-actions-inline {
  display: flex;
  gap: var(--spacing-xs);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.alert-item:hover .alert-actions-inline {
  opacity: 1;
}

.btn-icon-sm {
  width: 28px;
  height: 28px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

.btn-icon-sm:hover {
  background: var(--primary-blue);
  color: white;
}

.acknowledged-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 4px 10px;
  background: rgba(52, 199, 89, 0.1);
  color: var(--low-green);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  margin-left: var(--spacing-sm);
}

.alert-item.acknowledged {
  opacity: 0.7;
}

.alert-category {
  padding: 4px 10px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-md { gap: var(--spacing-md); }