/* Pokemon Pack Opener - Main Stylesheet */

/* ===== CSS CUSTOM PROPERTIES (THEME SYSTEM) ===== */

:root {
  /* Light Theme Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;
  --accent-color: #007bff;
  --accent-hover: #0056b3;
  --border-color: #dee2e6;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;

  /* Spacing Variables */
  --spacing-xs: 0.25rem; /* 4px */
  --spacing-sm: 0.5rem; /* 8px */
  --spacing-md: 1rem; /* 16px */
  --spacing-lg: 1.5rem; /* 24px */
  --spacing-xl: 2rem; /* 32px */
  --spacing-xxl: 3rem; /* 48px */

  /* Typography Variables */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-xxl: 1.5rem; /* 24px */
  --font-size-xxxl: 2rem; /* 32px */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-base: 1.5;
  --line-height-relaxed: 1.75;

  /* Layout Variables */
  --border-radius-sm: 0.25rem; /* 4px */
  --border-radius-md: 0.5rem; /* 8px */
  --border-radius-lg: 0.75rem; /* 12px */
  --border-radius-xl: 1rem; /* 16px */
  --border-width: 1px;
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Grid System Variables */
  --container-max-width: 1200px;
  --container-max-width-narrow: 800px;
  --container-max-width-wide: 1400px;
  --grid-gap: var(--spacing-md);
  --card-min-width: 200px;
  --card-aspect-ratio: 3/4;
}

/* Dark Theme Override */
[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #404040;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #6c757d;
  --accent-color: #4dabf7;
  --accent-hover: #339af0;
  --border-color: #404040;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --success-color: #51cf66;
  --warning-color: #ffd43b;
  --danger-color: #ff6b6b;
}

/* ===== ERROR HANDLING & LOADING STYLES ===== */

/* Error Notifications */
.error-notifications {
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 9999;
  max-width: 400px;
  pointer-events: none;
}

.error-notification {
  background: var(--bg-primary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 4px 12px var(--shadow-color);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-md);
  pointer-events: auto;
  position: relative;
  transform: translateX(100%);
  animation: slideInRight 0.3s ease forwards;
}

.error-notification.dismissing {
  animation: slideOutRight 0.3s ease forwards;
}

.error-notification.severity-low {
  border-left: 4px solid var(--warning-color);
}

.error-notification.severity-medium {
  border-left: 4px solid var(--danger-color);
}

.error-notification.severity-high,
.error-notification.severity-critical {
  border-left: 4px solid var(--danger-color);
  background: color-mix(in srgb, var(--danger-color) 10%, var(--bg-primary));
}

.error-dismiss {
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-xs);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: var(--font-size-lg);
  line-height: 1;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
}

.error-dismiss:hover,
.error-dismiss:focus {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.error-content {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.error-icon {
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.error-message {
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  margin-bottom: var(--spacing-sm);
}

.error-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.error-action {
  background: var(--accent-color);
  border: none;
  border-radius: var(--border-radius-sm);
  color: white;
  cursor: pointer;
  font-size: var(--font-size-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: var(--transition-fast);
}

.error-action:hover,
.error-action:focus {
  background: var(--accent-hover);
}

/* Offline Indicator */
.offline-indicator {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--warning-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  z-index: 9998;
  animation: slideInDown 0.3s ease;
}

.offline-icon {
  font-size: var(--font-size-base);
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(2px);
}

.loading-spinner {
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: 0 4px 20px var(--shadow-color);
  min-width: 200px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

.loading-text {
  color: var(--text-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  margin: 0;
}

/* Error State Styles */
.error-state {
  text-align: center;
  padding: var(--spacing-xxl);
  color: var(--text-secondary);
}

.error-state-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.error-state-title {
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

.error-state-message {
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  margin-bottom: var(--spacing-lg);
}

.error-state-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

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

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

@keyframes slideInDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .error-notification,
  .offline-indicator,
  .spinner {
    animation: none;
  }

  .error-notification {
    transform: translateX(0);
  }

  .offline-indicator {
    transform: translateY(0);
  }
}

/* ===== BASE STYLES ===== */

* {
  box-sizing: border-box;
}

*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-base),
    color var(--transition-base);
}

/* ===== TYPOGRAPHY UTILITIES ===== */

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--spacing-md) 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
}

h1 {
  font-size: var(--font-size-xxxl);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: var(--font-size-xxl);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

h5,
h6 {
  font-size: var(--font-size-base);
}

p {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--text-secondary);
}

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

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

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

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

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

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

.font-medium {
  font-weight: var(--font-weight-medium);
}

.font-semibold {
  font-weight: var(--font-weight-semibold);
}

.font-bold {
  font-weight: var(--font-weight-bold);
}

/* ===== SPACING UTILITIES ===== */

.m-0 {
  margin: 0;
}
.m-xs {
  margin: var(--spacing-xs);
}
.m-sm {
  margin: var(--spacing-sm);
}
.m-md {
  margin: var(--spacing-md);
}
.m-lg {
  margin: var(--spacing-lg);
}
.m-xl {
  margin: var(--spacing-xl);
}
.m-xxl {
  margin: var(--spacing-xxl);
}

.mt-0 {
  margin-top: 0;
}
.mt-xs {
  margin-top: var(--spacing-xs);
}
.mt-sm {
  margin-top: var(--spacing-sm);
}
.mt-md {
  margin-top: var(--spacing-md);
}
.mt-lg {
  margin-top: var(--spacing-lg);
}
.mt-xl {
  margin-top: var(--spacing-xl);
}
.mt-xxl {
  margin-top: var(--spacing-xxl);
}

.mb-0 {
  margin-bottom: 0;
}
.mb-xs {
  margin-bottom: var(--spacing-xs);
}
.mb-sm {
  margin-bottom: var(--spacing-sm);
}
.mb-md {
  margin-bottom: var(--spacing-md);
}
.mb-lg {
  margin-bottom: var(--spacing-lg);
}
.mb-xl {
  margin-bottom: var(--spacing-xl);
}
.mb-xxl {
  margin-bottom: var(--spacing-xxl);
}

.ml-0 {
  margin-left: 0;
}
.ml-xs {
  margin-left: var(--spacing-xs);
}
.ml-sm {
  margin-left: var(--spacing-sm);
}
.ml-md {
  margin-left: var(--spacing-md);
}
.ml-lg {
  margin-left: var(--spacing-lg);
}
.ml-xl {
  margin-left: var(--spacing-xl);
}
.ml-xxl {
  margin-left: var(--spacing-xxl);
}

.mr-0 {
  margin-right: 0;
}
.mr-xs {
  margin-right: var(--spacing-xs);
}
.mr-sm {
  margin-right: var(--spacing-sm);
}
.mr-md {
  margin-right: var(--spacing-md);
}
.mr-lg {
  margin-right: var(--spacing-lg);
}
.mr-xl {
  margin-right: var(--spacing-xl);
}
.mr-xxl {
  margin-right: var(--spacing-xxl);
}

.p-0 {
  padding: 0;
}
.p-xs {
  padding: var(--spacing-xs);
}
.p-sm {
  padding: var(--spacing-sm);
}
.p-md {
  padding: var(--spacing-md);
}
.p-lg {
  padding: var(--spacing-lg);
}
.p-xl {
  padding: var(--spacing-xl);
}
.p-xxl {
  padding: var(--spacing-xxl);
}

.pt-0 {
  padding-top: 0;
}
.pt-xs {
  padding-top: var(--spacing-xs);
}
.pt-sm {
  padding-top: var(--spacing-sm);
}
.pt-md {
  padding-top: var(--spacing-md);
}
.pt-lg {
  padding-top: var(--spacing-lg);
}
.pt-xl {
  padding-top: var(--spacing-xl);
}
.pt-xxl {
  padding-top: var(--spacing-xxl);
}

.pb-0 {
  padding-bottom: 0;
}
.pb-xs {
  padding-bottom: var(--spacing-xs);
}
.pb-sm {
  padding-bottom: var(--spacing-sm);
}
.pb-md {
  padding-bottom: var(--spacing-md);
}
.pb-lg {
  padding-bottom: var(--spacing-lg);
}
.pb-xl {
  padding-bottom: var(--spacing-xl);
}
.pb-xxl {
  padding-bottom: var(--spacing-xxl);
}

.pl-0 {
  padding-left: 0;
}
.pl-xs {
  padding-left: var(--spacing-xs);
}
.pl-sm {
  padding-left: var(--spacing-sm);
}
.pl-md {
  padding-left: var(--spacing-md);
}
.pl-lg {
  padding-left: var(--spacing-lg);
}
.pl-xl {
  padding-left: var(--spacing-xl);
}
.pl-xxl {
  padding-left: var(--spacing-xxl);
}

.pr-0 {
  padding-right: 0;
}
.pr-xs {
  padding-right: var(--spacing-xs);
}
.pr-sm {
  padding-right: var(--spacing-sm);
}
.pr-md {
  padding-right: var(--spacing-md);
}
.pr-lg {
  padding-right: var(--spacing-lg);
}
.pr-xl {
  padding-right: var(--spacing-xl);
}
.pr-xxl {
  padding-right: var(--spacing-xxl);
}
/* ===== LAYOUT COMPONENTS ===== */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
}

/* ===== RESPONSIVE GRID SYSTEM ===== */

.grid {
  display: grid;
  gap: var(--grid-gap);
}

/* Card Grid - Responsive columns based on card minimum width */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--card-min-width), 1fr));
  gap: var(--grid-gap);
  padding: var(--spacing-md);
}

/* Specific grid layouts for different contexts */
.grid-1 {
  grid-template-columns: 1fr;
}

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

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

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

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Flexbox utilities */
.flex {
  display: flex;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

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

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

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

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

.justify-start {
  justify-content: flex-start;
}

.justify-end {
  justify-content: flex-end;
}

.flex-1 {
  flex: 1;
}

.gap-xs {
  gap: var(--spacing-xs);
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

.gap-xl {
  gap: var(--spacing-xl);
}

/* ===== RESPONSIVE BREAKPOINTS ===== */

/* Mobile First Approach */
/* Base styles are for mobile (< 768px) */

/* Mobile-specific optimizations */
@media (max-width: 767px) {
  /* Increase touch targets for mobile */
  .btn {
    min-height: 48px;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
  }

  .nav-tab {
    min-height: 48px;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
  }

  .filter-btn {
    min-height: 48px;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
  }

  .theme-toggle {
    min-width: 48px;
    min-height: 48px;
  }

  /* Mobile navigation adjustments */
  .nav-container {
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }

  .nav-tabs {
    width: 100%;
    justify-content: center;
  }

  .nav-tab {
    flex: 1;
    text-align: center;
  }

  /* Mobile card grids */
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  .collection-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-sm);
  }

  .revealed-cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-sm);
  }

  /* Mobile pack selection */
  .pack-selection {
    padding: var(--spacing-sm);
  }

  .pack-item {
    max-width: 280px;
    padding: var(--spacing-md);
  }

  /* Mobile collection filters */
  .collection-filters {
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    padding: 0 var(--spacing-sm);
  }

  .filter-btn {
    flex: 1;
    min-width: 80px;
  }

  /* Mobile modal adjustments */
  .modal-content {
    margin: var(--spacing-md);
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
  }

  .modal-body {
    flex-direction: column;
  }

  .card-detail-image {
    width: 100%;
    max-width: 300px;
    margin: 0 auto var(--spacing-md) auto;
  }

  /* Mobile typography adjustments */
  .section-title {
    font-size: var(--font-size-xl);
  }

  .app-title {
    font-size: var(--font-size-lg);
    text-align: center;
  }

  /* Mobile spacing adjustments */
  .main-content {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .section {
    padding: var(--spacing-lg) 0;
  }

  /* Mobile pack actions */
  .pack-actions {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }

  .pack-actions .btn {
    width: 100%;
  }

  /* Mobile collection header */
  .collection-header {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }

  .collection-stats {
    justify-content: center;
    gap: var(--spacing-md);
  }
}

/* ===== CARD COMPONENT STYLES ===== */

.card {
  background-color: var(--bg-secondary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  transition: all var(--transition-base);
  box-shadow: 0 2px 4px var(--shadow-color);
  aspect-ratio: var(--card-aspect-ratio);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow-color);
  border-color: var(--accent-color);
}

.card-header {
  margin-bottom: var(--spacing-sm);
}

.card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-footer {
  margin-top: var(--spacing-sm);
  padding-top: var(--spacing-sm);
  border-top: var(--border-width) solid var(--border-color);
}

/* ===== BUTTON STYLES ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);
  text-decoration: none;
  border: var(--border-width) solid transparent;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  min-height: 44px; /* Touch-friendly minimum */
}

.btn:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

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

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

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

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

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  min-height: 36px;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-lg);
  min-height: 52px;
}

/* ===== UTILITY CLASSES ===== */

.hidden {
  display: none !important;
}

.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;
}

.rounded-sm {
  border-radius: var(--border-radius-sm);
}

.rounded-md {
  border-radius: var(--border-radius-md);
}

.rounded-lg {
  border-radius: var(--border-radius-lg);
}

.rounded-xl {
  border-radius: var(--border-radius-xl);
}

.shadow-sm {
  box-shadow: 0 1px 2px var(--shadow-color);
}

.shadow-md {
  box-shadow: 0 2px 4px var(--shadow-color);
}

.shadow-lg {
  box-shadow: 0 4px 8px var(--shadow-color);
}

.border {
  border: var(--border-width) solid var(--border-color);
}

.border-t {
  border-top: var(--border-width) solid var(--border-color);
}

.border-b {
  border-bottom: var(--border-width) solid var(--border-color);
}

.border-l {
  border-left: var(--border-width) solid var(--border-color);
}

.border-r {
  border-right: var(--border-width) solid var(--border-color);
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

.min-h-screen {
  min-height: 100vh;
}

/* ===== TOUCH AND MOBILE ENHANCEMENTS ===== */

/* Touch feedback for interactive elements */
.touch-active {
  transform: scale(0.98);
  opacity: 0.8;
  transition: transform 0.1s ease, opacity 0.1s ease;
}

/* Improved touch targets for mobile */
@media (max-width: 767px) {
  .btn,
  .nav-tab,
  .filter-btn {
    min-height: 48px;
    min-width: 48px;
  }

  .collection-card,
  .revealed-card {
    min-height: 48px;
  }
}

/* Swipe feedback animation */
.swipe-feedback {
  animation: swipeFeedback 0.3s ease-out;
}

@keyframes swipeFeedback {
  0% {
    transform: translate(-50%, -50%) scale(0.8);
    opacity: 0;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
}

/* Prevent text selection on touch devices */
@media (max-width: 767px) {
  .btn,
  .nav-tab,
  .filter-btn,
  .collection-card,
  .revealed-card {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }
}

/* Smooth scrolling for mobile */
@media (max-width: 767px) {
  html {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
  }

  .main-content {
    -webkit-overflow-scrolling: touch;
  }

  /* Performance optimizations for mobile */
  .collection-card,
  .revealed-card {
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
  }

  /* Optimize animations for mobile */
  .card:hover,
  .collection-card:hover,
  .revealed-card:hover {
    transform: translateY(-2px) translateZ(0);
  }

  /* Reduce motion for users who prefer it */
  @media (prefers-reduced-motion: reduce) {
    * {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }
}

/* ===== THEME TRANSITION ===== */

* {
  transition: background-color var(--transition-base),
    color var(--transition-base), border-color var(--transition-base);
}

/* Disable transitions during theme change to prevent flash */
.theme-transitioning * {
  transition: none !important;
}

/* Theme storage warning notification */
.theme-storage-warning {
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background-color: var(--warning-color);
  color: var(--text-primary);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  max-width: 300px;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.theme-storage-warning p {
  margin: 0;
  font-size: var(--font-size-sm);
  color: inherit;
}

.dismiss-warning {
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  cursor: pointer;
  padding: 0;
  line-height: 1;
  color: inherit;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.dismiss-warning:hover {
  opacity: 1;
}

/* Error notification */
.error-notification {
  position: fixed;
  top: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--danger-color);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  max-width: 400px;
  text-align: center;
  font-weight: var(--font-weight-medium);
}
/* ===== APPLICATION-SPECIFIC LAYOUT ===== */

/* Main app container */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header styles */
.header {
  background-color: var(--bg-secondary);
  border-bottom: var(--border-width) solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

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

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

/* View containers */
.view-container {
  display: none;
}

.view-container.active {
  display: block;
}

/* Container variants for different content types */
.container-narrow {
  max-width: var(--container-max-width-narrow);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: var(--container-max-width-wide);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Section containers */
.packs-container,
.collection-container {
  max-width: 100%;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-xxl);
  font-weight: var(--font-weight-bold);
}

/* Pack selection area */
.pack-selection {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-xxl);
}

.pack-item {
  text-align: center;
  max-width: 300px;
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  border: var(--border-width) solid var(--border-color);
  transition: all var(--transition-base);
}

.pack-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-color);
}

.pack-image img {
  width: 100%;
}

/* Pack opening area */
.pack-opening-area {
  max-width: var(--container-max-width-narrow);
  margin: 0 auto;
  display: none; /* Hidden by default, shown when pack is opened */
}

.pack-animation-container {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-reveal-area {
  margin-top: var(--spacing-xl);
}

.revealed-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.pack-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* Revealed card styles */
.revealed-card {
  position: relative;
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  aspect-ratio: 3/4;
  display: flex;
  flex-direction: column;
}

.revealed-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.revealed-card .card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.revealed-card .card-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: white;
  padding: var(--spacing-md);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.revealed-card:hover .card-info {
  transform: translateY(0);
}

.revealed-card .card-name {
  margin: 0 0 var(--spacing-xs) 0;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: white;
}

.revealed-card .card-rarity {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Rarity-specific styling */
.revealed-card[data-rarity="common"] {
  border: 2px solid #6c757d;
}

.revealed-card[data-rarity="uncommon"] {
  border: 2px solid #28a745;
}

.revealed-card[data-rarity="rare"] {
  border: 2px solid #007bff;
  box-shadow: 0 0 10px rgba(0, 123, 255, 0.3);
}

.revealed-card[data-rarity="ultra_rare"] {
  border: 2px solid #ffc107;
  box-shadow: 0 0 15px rgba(255, 193, 7, 0.4);
}

.revealed-card .rarity-common {
  color: #6c757d;
}

.revealed-card .rarity-uncommon {
  color: #28a745;
}

.revealed-card .rarity-rare {
  color: #007bff;
}

.revealed-card .rarity-ultra_rare {
  color: #ffc107;
}

/* Guaranteed card indicator */
.revealed-card.guaranteed-card::before {
  content: "";
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-xs);
  width: 20px;
  height: 20px;
  background: linear-gradient(45deg, #ffd700, #ffed4e);
  border-radius: 50%;
  z-index: 1;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.revealed-card.guaranteed-card::after {
  content: "★";
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-xs);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #333;
  z-index: 2;
}

.guaranteed-indicator {
  display: block;
  font-size: var(--font-size-xs);
  color: #ffd700;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-xs);
}

/* Collection styles */
.collection-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.collection-stats {
  display: flex;
  gap: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.collection-filters {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  min-height: 40px;
}

.filter-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--accent-color);
}

.filter-btn.active {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.filter-btn:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.empty-collection {
  text-align: center;
  padding: var(--spacing-xxl);
  max-width: var(--container-max-width-narrow);
  margin: 0 auto;
}

.empty-state-content h3 {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.empty-state-content p {
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
}

/* Collection card styles */
.collection-card {
  position: relative;
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  aspect-ratio: 3/4;
  cursor: pointer;
  border: 2px solid transparent;
}

.collection-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.collection-card:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.collection-card .card-image-container {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.collection-card .card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-base);
}

/* .collection-card:hover .card-image {
  transform: scale(1.05);
} */

.collection-card .card-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
  color: white;
  padding: var(--spacing-md);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.collection-card:hover .card-info {
  transform: translateY(0);
}

.collection-card .card-name {
  margin: 0 0 var(--spacing-xs) 0;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: white;
}

.collection-card .card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-xs);
}

.collection-card .card-rarity {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.collection-card .card-number {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.8);
  font-weight: var(--font-weight-medium);
}

/* Card count badge for duplicates */
.card-count-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: var(--accent-color);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  z-index: 2;
  min-width: 24px;
  text-align: center;
}

/* Rarity-specific border colors for collection cards */
.collection-card.rarity-common {
  border-color: #6c757d;
}

.collection-card.rarity-common:hover {
  border-color: #6c757d;
  box-shadow: 0 4px 12px rgba(108, 117, 125, 0.2);
}

.collection-card.rarity-uncommon {
  border-color: #28a745;
}

.collection-card.rarity-uncommon:hover {
  border-color: #28a745;
  box-shadow: 0 4px 12px rgba(40, 167, 69, 0.2);
}

.collection-card.rarity-rare {
  border-color: #007bff;
}

.collection-card.rarity-rare:hover {
  border-color: #007bff;
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.collection-card.rarity-ultra_rare {
  border-color: #ffc107;
}

.collection-card.rarity-ultra_rare:hover {
  border-color: #ffc107;
  box-shadow: 0 4px 12px rgba(255, 193, 7, 0.4);
}

/* Rarity text colors */
.collection-card .rarity-common {
  color: #6c757d;
}

.collection-card .rarity-uncommon {
  color: #28a745;
}

.collection-card .rarity-rare {
  color: #007bff;
}

.collection-card .rarity-ultra_rare {
  color: #ffc107;
}

/* Responsive adjustments for main content */
@media (min-width: 768px) {
  .main-content {
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .container-narrow {
    padding: 0 var(--spacing-lg);
  }

  .container-wide {
    padding: 0 var(--spacing-lg);
  }

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

  .revealed-cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }

  .collection-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

@media (min-width: 1024px) {
  .main-content {
    padding: var(--spacing-xl) var(--spacing-xl);
  }

  .container-narrow {
    padding: 0 var(--spacing-xl);
  }

  .container-wide {
    padding: 0 var(--spacing-xl);
  }

  .nav-container {
    padding: var(--spacing-lg) var(--spacing-xl);
  }

  .revealed-cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }

  .collection-grid {
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  }
}

/* Navigation tabs */
.nav-tabs {
  display: flex;
  gap: var(--spacing-sm);
}

.nav-tab {
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

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

.nav-tab.active {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* Theme toggle button */
.theme-toggle {
  padding: var(--spacing-sm);
  background: transparent;
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}

.theme-toggle:hover {
  background-color: var(--bg-tertiary);
}

.theme-icon {
  font-size: var(--font-size-lg);
}
/* ===== ACCESSIBILITY ENHANCEMENTS ===== */

/* Skip links for keyboard navigation */
.skip-links {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--accent-color);
  color: white;
  padding: 12px 16px;
  text-decoration: none;
  border-radius: 0 0 var(--border-radius-md) 0;
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  z-index: 1001;
  transition: top var(--transition-fast);
  box-shadow: var(--shadow-lg);
  border: 2px solid white;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid white;
  outline-offset: 2px;
}

.skip-link:hover {
  background: var(--accent-hover);
}

.skip-link + .skip-link {
  left: 160px; /* Offset second skip link */
}

/* Enhanced focus indicators for keyboard navigation */
.keyboard-navigation *:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Main content focus styling */
#main-content:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.keyboard-navigation .nav-tab:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.25);
}

.keyboard-navigation .collection-card:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-color), 0 0 0 4px rgba(0, 123, 255, 0.25);
}

.keyboard-navigation .filter-btn:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.25);
}

/* Card stack keyboard support */
.card-stack:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.25);
}

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

  .reduce-motion .card:hover,
  .reduce-motion .collection-card:hover,
  .reduce-motion .revealed-card:hover {
    transform: none !important;
  }

  .reduce-motion .pack-item:hover {
    transform: none !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-width: 2px;
    --accent-color: #0066cc;
    --accent-hover: #004499;
  }

  .btn:focus,
  .nav-tab:focus,
  .filter-btn:focus,
  .collection-card:focus {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
  }
}

/* Screen reader only content */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Screen reader announcements */
#sr-announcements {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Animation state management for accessibility */
.animating button:not(.modal-close),
.animating .nav-tab,
.animating .filter-btn,
.animating .collection-card {
  pointer-events: none;
  opacity: 0.6;
}

.animating [aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Focus management during animations */
.animating *:focus {
  outline: none;
}

/* Enhanced modal accessibility */
.modal-overlay[aria-hidden="true"] {
  display: none !important;
}

.modal-content:focus {
  outline: none;
}

/* Collection grid accessibility enhancements */
.collection-grid[role="grid"] {
  outline: none;
}

.collection-card[role="gridcell"] {
  position: relative;
}

.collection-card[role="gridcell"]:focus::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border: 2px solid var(--accent-color);
  border-radius: var(--border-radius-lg);
  pointer-events: none;
}

/* Pack opening area accessibility */
.pack-opening-area[aria-live="polite"] {
  /* Ensure live region is properly announced */
}

.card-reveal-area[aria-live="polite"] {
  /* Ensure card reveals are announced */
}

/* Loading state accessibility */
.loading-overlay[aria-hidden="false"] {
  display: flex !important;
}

.loading-spinner[role="status"] {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* Error notifications accessibility */
.error-notification[role="alert"] {
  position: fixed;
  top: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--danger-color);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  max-width: 400px;
  text-align: center;
  font-weight: var(--font-weight-medium);
}

/* Touch and mobile accessibility improvements */
@media (max-width: 767px) {
  /* Larger touch targets */
  .btn,
  .nav-tab,
  .filter-btn,
  .collection-card,
  .theme-toggle {
    min-height: 48px;
    min-width: 48px;
  }

  /* Better spacing for touch navigation */
  .nav-tabs {
    gap: var(--spacing-md);
  }

  .collection-filters {
    gap: var(--spacing-md);
  }

  /* Improved focus indicators on mobile */
  .keyboard-navigation *:focus {
    outline-width: 3px;
    outline-offset: 3px;
  }
}

/* Dark theme accessibility adjustments */
[data-theme="dark"] {
  /* Ensure sufficient contrast in dark mode */
  --accent-color: #4dabf7;
  --accent-hover: #339af0;
}

[data-theme="dark"] .keyboard-navigation *:focus {
  outline-color: var(--accent-color);
  box-shadow: 0 0 0 4px rgba(77, 171, 247, 0.25);
}

/* Animation feedback for screen readers */
.pack-opening[aria-live="polite"]::after {
  content: "Pack opening animation in progress";
  position: absolute;
  left: -10000px;
}

.card-reveal[aria-live="polite"]::after {
  content: "Card being revealed";
  position: absolute;
  left: -10000px;
}

/* Ensure proper heading hierarchy */
.section-title {
  /* Already properly styled as h2 */
}

.card-name {
  /* Ensure card names are properly structured */
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  margin: 0;
}

/* Collection stats accessibility */
.collection-stats[aria-live="polite"] {
  /* Ensure stats updates are announced */
}

/* Filter button group accessibility */
.collection-filters[role="group"] {
  /* Ensure filter group is properly identified */
}

.filter-btn[aria-pressed="true"] {
  /* Enhanced styling for active filter */
  font-weight: var(--font-weight-bold);
}

/* Pack actions accessibility */
.pack-actions[role="group"] {
  /* Ensure action group is properly identified */
}

/* Card detail modal accessibility enhancements */
.modal-content[role="dialog"] {
  /* Ensure modal is properly identified */
}

.card-meta[role="group"] {
  /* Ensure card metadata is grouped */
}

/* Empty state accessibility */
.empty-collection[role="status"] {
  /* Ensure empty state is announced */
}

/* Theme toggle accessibility */
.theme-toggle[aria-pressed="true"] {
  /* Visual indication of pressed state */
  background-color: var(--accent-color);
  color: white;
}

.theme-icon[aria-hidden="true"] {
  /* Ensure decorative icon is hidden from screen readers */
}

/* Navigation accessibility */
.nav-tabs[role="tablist"] {
  /* Ensure tab list is properly identified */
}

.nav-tab[role="tab"] {
  /* Ensure tabs are properly identified */
}

.view-container[role="tabpanel"] {
  /* Ensure tab panels are properly identified */
}

/* Loading indicator accessibility */
.loading-spinner .sr-only {
  /* Ensure loading message is available to screen readers */
}

/* Card interaction feedback */
.collection-card[role="button"]:hover::after {
  content: "Press Enter or Space to view details";
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  box-shadow: var(--shadow-md);
  z-index: 10;
  opacity: 0;
  animation: fadeInTooltip 0.3s ease forwards;
}

@keyframes fadeInTooltip {
  to {
    opacity: 1;
  }
}

/* Keyboard navigation improvements */
.keyboard-navigation .collection-card[role="button"]:focus::after {
  content: "Press Enter or Space to view details";
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-color);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  box-shadow: var(--shadow-md);
  z-index: 10;
  opacity: 1;
}

/* ===== ERROR HANDLING STYLES ===== */

/* Error Notifications Container */
.error-notifications {
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 9999;
  max-width: 400px;
  pointer-events: none;
}

/* Individual Error Notification */
.error-notification {
  background: var(--bg-primary);
  border: 2px solid var(--danger-color);
  border-radius: var(--border-radius-md);
  box-shadow: 0 4px 12px var(--shadow-color);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-md);
  position: relative;
  pointer-events: auto;
  animation: slideInRight 0.3s ease-out;
  transition: all 0.3s ease;
}

.error-notification.dismissing {
  animation: slideOutRight 0.3s ease-in;
  opacity: 0;
  transform: translateX(100%);
}

/* Error Severity Styles */
.error-notification.severity-low {
  border-color: var(--warning-color);
}

.error-notification.severity-medium {
  border-color: var(--danger-color);
}

.error-notification.severity-high {
  border-color: var(--danger-color);
  background: #fff5f5;
}

.error-notification.severity-critical {
  border-color: var(--danger-color);
  background: #ffe6e6;
  border-width: 3px;
}

/* Error Content Layout */
.error-content {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.error-icon {
  font-size: var(--font-size-lg);
  flex-shrink: 0;
  margin-top: 2px;
}

.error-message {
  flex: 1;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

/* Error Actions */
.error-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  flex-wrap: wrap;
}

.error-action {
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.error-action:hover {
  background: var(--accent-hover);
}

.error-action:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Error Dismiss Button */
.error-dismiss {
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-xs);
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  line-height: 1;
  border-radius: var(--border-radius-sm);
  transition: color 0.2s ease;
}

.error-dismiss:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.error-dismiss:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Offline Indicator */
.offline-indicator {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-primary);
  border: 2px solid var(--warning-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: 0 8px 24px var(--shadow-color);
  z-index: 10000;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  animation: fadeIn 0.3s ease-out;
}

.offline-icon {
  font-size: var(--font-size-xl);
}

.offline-text {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

/* Loading Overlay Enhancements */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9998;
  backdrop-filter: blur(2px);
}

.loading-spinner {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 4px 12px var(--shadow-color);
  border: 1px solid var(--border-color);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--bg-tertiary);
  border-top: 4px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

.loading-text {
  font-size: var(--font-size-base);
  color: var(--text-primary);
  margin: 0;
}

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

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Dark Theme Error Styles */
[data-theme="dark"] .error-notification {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

[data-theme="dark"] .error-notification.severity-high {
  background: #2d1b1b;
}

[data-theme="dark"] .error-notification.severity-critical {
  background: #331a1a;
}

[data-theme="dark"] .offline-indicator {
  background: var(--bg-secondary);
}

[data-theme="dark"] .loading-overlay {
  background: rgba(26, 26, 26, 0.9);
}

[data-theme="dark"] .loading-spinner {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .error-notification,
  .offline-indicator,
  .spinner {
    animation: none;
  }

  .error-notification.dismissing {
    opacity: 0;
    transition: opacity 0.1s ease;
  }
}

.reduce-motion .error-notification,
.reduce-motion .offline-indicator,
.reduce-motion .spinner {
  animation: none;
}

/* Mobile Responsive Error Styles */
@media (max-width: 768px) {
  .error-notifications {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    left: var(--spacing-sm);
    max-width: none;
  }

  .error-notification {
    padding: var(--spacing-sm);
  }

  .error-actions {
    flex-direction: column;
  }

  .error-action {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: var(--font-size-sm);
  }

  .offline-indicator {
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    transform: translateY(-50%);
    width: auto;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  .error-notification {
    border-width: 3px;
  }

  .error-action {
    border: 2px solid transparent;
  }

  .error-action:focus {
    border-color: currentColor;
  }
}