/* CSS Custom Properties for Theming */
:root {
  --accent-primary: #ff6b35;
  --accent-secondary: #f7931e;
  --page-background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  --bg-color: #fff3e0;
  --card-bg: #ffffff;
  --card-border-color: #ffe5cc;
  --surface-panel: rgba(255, 255, 255, 0.96);
  --surface-muted: rgba(255, 255, 255, 0.8);
  --text-color: #2d2d2d;
  --navbar-bg: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  --footer-bg: #2a2a2a;
  --border-color: rgba(0, 0, 0, 0.12);
  --shadow: rgba(0, 0, 0, 0.18);
  --hover-shadow: rgba(0, 0, 0, 0.28);
  --link-color: #f4b400;
  --success-color: #2e7d32;
  --warning-color: #f9a825;
  --error-color: #c62828;
  --card-hover-highlight: #ffde00;
  --card-hover-shadow: rgba(255, 222, 0, 0.35);
  --interactive-color: #ffde00;
  --interactive-color-strong: #f8b400;
  --interactive-color-contrast: #2d2d2d;
}

/* Dark theme variables */
[data-theme='dark'] {
  --accent-primary: #ff8f61;
  --accent-secondary: #ffa94d;
  --page-background: linear-gradient(135deg, #101010, #1c1c1c);
  --bg-color: #1e1e1e;
  --card-bg: #1c1c1c;
  --card-border-color: #ffe5cc;
  --surface-panel: rgba(24, 24, 24, 0.92);
  --surface-muted: rgba(40, 40, 40, 0.8);
  --text-color: #f5f5f5;
  --navbar-bg: linear-gradient(135deg, #2b2b2b, #1a1a1a);
  --footer-bg: #101010;
  --border-color: rgba(255, 255, 255, 0.14);
  --shadow: rgba(0, 0, 0, 0.65);
  --hover-shadow: rgba(0, 0, 0, 0.75);
  --link-color: #ffe083;
  --success-color: #81c784;
  --card-hover-highlight: #ffd24d;
  --card-hover-shadow: rgba(255, 210, 77, 0.38);
  --interactive-color: #ffd24d;
  --interactive-color-strong: #f5a623;
  --interactive-color-contrast: #1a1a1a;
  --warning-color: #ffecb3;
  --error-color: #ef9a9a;
}

/* Base Styles and Mobile Optimization */

/* CSS Reset and Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: var(--page-background, linear-gradient(135deg, #ff6b35, #f7931e));
}

::selection {
  background: var(--interactive-color);
  color: var(--interactive-color-contrast);
}

::-moz-selection {
  background: var(--interactive-color);
  color: var(--interactive-color-contrast);
}

.card-inline-link {
  color: var(--link-color);
  font-weight: 600;
  text-decoration: none;
}

.card-inline-link:hover,
.card-inline-link:focus {
  text-decoration: underline;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Shared panel styling */
.surface-panel-block {
  background: var(--surface-panel);
  border-radius: 20px;
  border: 2px solid var(--border-color);
  box-shadow: 0 18px 40px var(--shadow);
  padding: 2rem;
  position: relative;
  margin-bottom: 2rem;
}

.surface-panel-block--compact {
  padding: 1.5rem;
}

.surface-panel-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.surface-panel-button {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.4rem;
  border-radius: 14px;
  background: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
  cursor: pointer;
}

.surface-panel-button .material-icons {
  font-size: 1.2rem;
}

.surface-panel-button:hover,
.surface-panel-button:focus {
  background: var(--surface-muted);
  box-shadow: 0 12px 28px var(--shadow);
  transform: translateY(-2px);
  color: var(--text-color);
}

.surface-panel-button:active {
  transform: translateY(0);
  box-shadow: 0 8px 18px var(--shadow);
}

.share-link-container {
  margin: 0.75rem auto 0;
  display: none;
  flex-direction: column;
  gap: 0.5rem;
  align-items: stretch;
  background: var(--card-bg);
  padding: 0.75rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: 0 6px 18px var(--shadow);
  width: min(320px, 100%);
}

.share-link-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--surface-muted);
  color: var(--text-color);
  margin-bottom: 0.5rem;
}

/* Navigation */
.navbar {
  background: var(--navbar-bg);
  color: white;
  padding: 1rem 0;
  box-shadow:
    0 4px 8px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  border-bottom: 3px solid #333;
  position: relative;
  z-index: 50;
}

.navbar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 1;
}

.navbar-brand a {
  color: white;
  text-decoration: none;
  font-size: 1.8rem;
  font-weight: bold;
  font-family: 'Comic Sans MS', cursive, sans-serif;
  text-shadow: 2px 2px 0px #333, 3px 3px 0px #000;
  letter-spacing: 1px;
}

.navbar-menu {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.navbar-menu a {
  color: white;
  text-decoration: none;
  padding: 0.7rem 1.2rem;
  border-radius: 15px;
  transition: all 0.3s;
  font-family: 'Comic Sans MS', cursive, sans-serif;
  font-weight: bold;
  text-shadow: 1px 1px 0px #333;
  border: 2px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

.navbar-menu a:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Navbar Actions */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-pill {
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  border-radius: 15px;
  padding: 0.45rem 0.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
  text-shadow: 1px 1px 0px #333;
}

.navbar-pill:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.6rem;
  margin-left: 0;
}

.theme-icon {
  font-size: 1.3rem;
}

.profile-menu {
  position: relative;
  display: flex;
}

.profile-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  gap: 0;
  padding: 0;
}

.profile-dropdown {
  position: absolute;
  top: 110%;
  right: 0;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.95), rgba(247, 147, 30, 0.95));
  color: #fff;
  border-radius: 12px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
  padding: 0.5rem 0;
  min-width: 200px;
  display: none;
  z-index: 10;
  overflow: hidden;
}

.profile-dropdown.show {
  display: block;
}

.profile-dropdown a {
  display: block;
  padding: 0.6rem 1rem;
  color: #fff;
  text-decoration: none;
  transition: background 0.2s;
  font-family: 'Comic Sans MS', cursive, sans-serif;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.profile-dropdown a:hover {
  background: rgba(255, 255, 255, 0.18);
}

.profile-dropdown-header {
  padding: 0.75rem 1rem 0.35rem;
  font-family: 'Comic Sans MS', cursive, sans-serif;
  font-weight: 700;
  color: #fff;
}

.profile-dropdown-separator {
  height: 1px;
  margin: 0.35rem 1rem 0.4rem;
  background: rgba(255, 255, 255, 0.25);
}

.profile-dropdown a:last-child {
  border-bottom: none;
}

.profile-icon {
  font-size: 1.4rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  text-decoration: none;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.3s;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  color: var(--interactive-color-contrast);
  box-shadow: 0 10px 20px rgba(247, 196, 0, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(
    135deg,
    var(--interactive-color-strong),
    var(--interactive-color)
  );
  box-shadow: 0 12px 24px rgba(247, 196, 0, 0.38);
}

.btn-secondary {
  background: linear-gradient(
    135deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  color: var(--interactive-color-contrast);
  box-shadow: 0 6px 18px rgba(255, 222, 0, 0.32);
}

.btn-secondary:hover {
  background: linear-gradient(
    135deg,
    var(--interactive-color-strong),
    var(--interactive-color)
  );
  box-shadow: 0 10px 24px rgba(255, 222, 0, 0.36);
}

.install-btn {
  background-color: #34a853;
  margin-left: 1rem;
}

.install-btn:hover {
  background-color: #2d8f47;
}

/* Main Content */
main {
  min-height: calc(100vh - 140px);
  padding: 2rem 0;
}

/* Messages */
.messages {
  margin-bottom: 1rem;
}

.message {
  padding: 1rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
  transition: opacity 0.3s ease;
}

.message.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.message.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.message.warning {
  background-color: #fff3cd;
  color: #856404;
  border: 1px solid #ffeaa7;
}

.message.fade-out {
  opacity: 0;
}

/* Footer */
.footer {
  background: var(--footer-bg);
  color: #f5f5f5;
  text-align: center;
  padding: 1.25rem 0;
  margin-top: 2rem;
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--interactive-color-strong);
  box-shadow: 0 0 0 3px rgba(255, 222, 0, 0.3);
}

/* Form groups with toggle switches */
.form-group:has(.toggle-group) {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 100%;
}

.form-group:has(.toggle-group) label {
  font-weight: 500;
  color: var(--text-color);
  margin-bottom: 0.5rem;
}

.toggle-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 100%;
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow);
  overflow: hidden;
  margin-bottom: 1rem;
}

.card-header {
  padding: 1rem;
  background-color: var(--card-bg);
  border-bottom: 1px solid #e9ecef;
}

.card-body {
  padding: 1rem;
}

.card-title {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
  font-weight: bold;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: 1rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Search Results */
.search-results {
  margin-top: 2rem;
}

.card-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow);
  margin-bottom: 1rem;
}

.card-item img {
  width: 100px;
  height: 140px;
  object-fit: cover;
  border-radius: 4px;
}

.card-item-info h3 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.card-item-info p {
  color: var(--text-color);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

/* Search Dropdown Styles */
.search-container {
  position: relative;
  margin-bottom: 1rem;
}

.suggestions-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  max-height: 300px;
  overflow-y: auto;
  z-index: 1000;
  display: none;
}

.suggestions-dropdown.show {
  display: block;
}

.suggestion-item {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background-color 0.2s;
}

.suggestion-item:hover {
  background-color: var(--card-bg);
}

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

.suggestion-item.selected {
  background-color: #e3f2fd;
}

.suggestion-item .card-thumb {
  width: 40px;
  height: 56px;
  object-fit: cover;
  border-radius: 4px;
  margin-right: 0.75rem;
}

.suggestion-item .card-info {
  display: flex;
  flex-direction: column;
}

.suggestion-item .card-name {
  font-weight: bold;
  color: var(--text-color);
  margin-bottom: 0.25rem;
}

.suggestion-item .card-details {
  font-size: 0.8rem;
  color: var(--text-color);
}

.suggestion-item .set-info {
  display: flex;
  flex-direction: column;
}

.suggestion-item .set-name {
  font-weight: bold;
  color: var(--text-color);
  margin-bottom: 0.25rem;
}

.suggestion-item .set-details {
  font-size: 0.8rem;
  color: var(--text-color);
}

/* Card Selection Styles */
.card-selection {
  margin-top: 1rem;
  max-height: 600px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  background: var(--card-bg);
}

.card-selection h4 {
  margin: 0 0 1.5rem 0;
  font-size: 1.2rem;
  color: var(--text-color);
  font-weight: bold;
  text-align: center;
}

.set-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.set-card-item {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 2px solid transparent;
}

.set-card-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px var(--card-hover-shadow, rgba(0, 0, 0, 0.18));
  border-color: var(--card-hover-highlight, #ffde00);
}

.set-card-item img {
  width: 120px;
  height: 168px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 0.75rem;
  box-shadow: 0 2px 8px var(--shadow);
}

.set-card-item .card-info {
  margin-bottom: 1rem;
  flex: 1;
}

.set-card-item .card-name {
  font-size: 1rem;
  font-weight: bold;
  color: var(--text-color);
  margin-bottom: 0.25rem;
  line-height: 1.2;
}

.set-card-item .card-character {
  font-size: 0.85rem;
  color: var(--text-color);
  margin-bottom: 0.25rem;
}

.set-card-item .card-number {
  font-size: 0.8rem;
  color: var(--interactive-color-strong);
  font-weight: 600;
}

.set-card-item .add-single-card-btn {
  width: 100%;
  padding: 0.75rem;
  background: linear-gradient(
    135deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  color: var(--interactive-color-contrast);
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 6px 16px rgba(255, 222, 0, 0.35);
}

.set-card-item .add-single-card-btn:hover:not(:disabled) {
  background: linear-gradient(
    135deg,
    var(--interactive-color-strong),
    var(--interactive-color)
  );
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 222, 0, 0.4);
}

.set-card-item .add-single-card-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* Form Radio Button Styles */
.radio-group {
  margin: 1rem 0;
}

.radio-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

.radio-options {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.radio-option {
  display: flex;
  align-items: center;
  margin-bottom: 0.5rem;
}

.radio-option input[type="radio"] {
  margin-right: 0.5rem;
}

.radio-option label {
  margin: 0;
  font-weight: normal;
  cursor: pointer;
}

/* Selectable Button Groups */
.button-group {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
  width: 100%;
}

.button-group input[type="radio"] {
  display: none;
}

.selectable-button {
  display: inline-block;
  padding: 0.75rem 1rem;
  background: var(--card-bg);
  border: 2px solid #e1e5e9;
  border-radius: 12px;
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  flex: 1;
  min-width: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.selectable-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s;
}

.selectable-button:hover::before {
  left: 100%;
}

.selectable-button:hover {
  background: var(--border-color);
  border-color: var(--interactive-color);
  color: var(--interactive-color-strong);
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(255, 222, 0, 0.28);
}

.button-group input[type="radio"]:checked + .selectable-button {
  background: linear-gradient(
    135deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  border-color: var(--interactive-color);
  color: var(--interactive-color-contrast);
  box-shadow: 0 8px 18px rgba(255, 222, 0, 0.32);
  transform: translateY(-2px);
}

.selectable-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Toggle Switches */
.toggle-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toggle-switch {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  min-height: 48px;
  width: 100%;
}

.toggle-switch:hover {
  background: var(--card-bg);
  box-shadow: 0 2px 8px var(--shadow);
}

.toggle-switch input[type="checkbox"] {
  display: none;
}

.toggle-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-color);
  user-select: none;
  width: 100%;
  padding: 0.25rem 0;
}

.toggle-text {
  flex: 1;
  margin-right: 1rem;
  line-height: 1.4;
}

.toggle-slider {
  position: relative;
  width: 50px;
  height: 28px;
  background: var(--border-color);
  border-radius: 28px;
  transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
  border: 2px solid var(--border-color);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  background: var(--card-bg);
  border-radius: 50%;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch input[type="checkbox"]:checked + .toggle-label .toggle-slider {
  background: linear-gradient(
    135deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  border-color: var(--interactive-color);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
}

.toggle-switch input[type="checkbox"]:checked + .toggle-label .toggle-slider::before {
  transform: translateX(22px);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

/* Checkbox Styles */
.checkbox-group {
  margin: 1rem 0;
}

.checkbox-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

.checkbox-option {
  display: flex;
  align-items: center;
  margin-bottom: 0.5rem;
}

.checkbox-option input[type="checkbox"] {
  margin-right: 0.5rem;
}

.checkbox-option label {
  margin: 0;
  font-weight: normal;
  cursor: pointer;
}

/* Loading States for Search */
.search-loading {
  padding: 1rem;
  text-align: center;
  color: var(--text-color);
}

.search-loading .loading {
  display: inline-block;
  margin-right: 0.5rem;
}

/* No Results */
.no-results {
  padding: 1rem;
  text-align: center;
  color: var(--text-color);
  font-style: italic;
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--interactive-color-strong);
  box-shadow: 0 0 0 3px rgba(255, 222, 0, 0.3);
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow);
  overflow: hidden;
  margin-bottom: 1rem;
}

.card-header {
  padding: 1rem;
  background-color: var(--card-bg);
  border-bottom: 1px solid #e9ecef;
}

.card-body {
  padding: 1rem;
}

.card-title {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
  font-weight: bold;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: 1rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Search Results */
.search-results {
  margin-top: 2rem;
}

.card-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow);
  margin-bottom: 1rem;
}

.card-item img {
  width: 100px;
  height: 140px;
  object-fit: cover;
  border-radius: 4px;
}

.card-item-info h3 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.card-item-info p {
  color: var(--text-color);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .container {
    padding: 0 0.5rem;
  }

  main {
    padding: 1rem 0;
  }

  .card-item {
    flex-direction: column;
    text-align: center;
  }

  .card-item img {
    width: 120px;
    height: 168px;
    margin: 0 auto;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

}

@media (max-width: 480px) {
  .navbar-brand a {
    font-size: 1.25rem;
  }

  .navbar-menu a,
  .btn {
    padding: 0.5rem;
    font-size: 0.9rem;
  }

  .install-btn {
    margin-left: 0.5rem;
    padding: 0.5rem 0.75rem;
  }

}

/* PWA Specific Styles */
@media all and (display-mode: standalone) {
  /* Hide browser UI when in standalone mode */
  .navbar {
    padding-top: max(1rem, env(safe-area-inset-top));
  }

  body {
    padding-bottom: env(safe-area-inset-bottom);
  }

}

/* Loading states */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--interactive-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

}

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--interactive-color-strong);
  outline-offset: 2px;
}

/* Authentication Forms */
.auth-page {
  max-width: 400px;
  margin: 2rem auto;
  padding: 2rem;
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow);
}

.auth-form {
  margin-bottom: 2rem;
}

.auth-form .form-group {
  margin-bottom: 1.5rem;
}

.auth-form label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-color);
}

.auth-form input[type="text"],
.auth-form input[type="email"],
.auth-form input[type="password"] {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.3s;
}

.auth-form input[type="text"]:focus,
.auth-form input[type="email"]:focus,
.auth-form input[type="password"]:focus {
  outline: none;
  border-color: var(--interactive-color-strong);
  box-shadow: 0 0 0 3px rgba(255, 222, 0, 0.25);
}

.auth-form button {
  width: 100%;
  margin-top: 1rem;
}

.auth-form .error {
  color: #dc3545;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: block;
}

/* Password Strength Indicator */
.password-strength {
  margin-top: 0.5rem;
}

.strength-bar {
  width: 100%;
  height: 8px;
  background-color: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.strength-fill {
  height: 100%;
  transition: width 0.3s ease, background-color 0.3s ease;
}

.strength-fill.very-weak {
  background-color: #dc3545;
}

.strength-fill.weak {
  background-color: #fd7e14;
}

.strength-fill.fair {
  background-color: #ffc107;
}

.strength-fill.good {
  background-color: #20c997;
}

.strength-fill.strong {
  background-color: #28a745;
}

.strength-requirements {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0;
  font-size: 0.875rem;
}

.strength-requirements li {
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
}

.strength-requirements li:before {
  content: '✗';
  color: #dc3545;
  margin-right: 0.5rem;
  font-weight: bold;
}

.strength-requirements li.passed:before {
  content: '✓';
  color: #28a745;
}

.strength-text {
  font-weight: 600;
  font-size: 0.875rem;
  text-align: center;
  margin-top: 0.5rem;
}

.strength-text.very-weak {
  color: #dc3545;
}

.strength-text.weak {
  color: #fd7e14;
}

.strength-text.fair {
  color: #ffc107;
}

.strength-text.good {
  color: #20c997;
}

.strength-text.strong {
  color: #28a745;
}

/* Auth page links */
.auth-page p {
  text-align: center;
  margin-top: 1rem;
}

.auth-page p a {
  color: var(--interactive-color-strong);
  text-decoration: none;
}

.auth-page p a:hover {
  text-decoration: underline;
}

/* Dashboard */
.dashboard {
  max-width: 1200px;
  margin: 0 auto;
}

.dashboard h1 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--text-color);
}

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow);
  text-align: center;
}

.stat-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 0.9rem;
  color: var(--text-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-number {
  font-size: 2rem;
  font-weight: bold;
  color: var(--interactive-color-strong);
  margin: 0;
}

.dashboard-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.recent-additions {
  margin-top: 2rem;
}

.recent-additions h2 {
  margin-bottom: 1rem;
  color: var(--text-color);
}

.recent-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}

.recent-item {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow);
  overflow: hidden;
  transition: transform 0.2s;
}

.recent-item:hover {
  transform: translateY(-2px);
}

.recent-item img {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.recent-info {
  padding: 0.75rem;
}

.recent-info h4 {
  margin: 0 0 0.25rem 0;
  font-size: 0.9rem;
  font-weight: bold;
}

.recent-info p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-color);
}

/* Collecting Page */
.collecting {
  max-width: 1200px;
  margin: 0 auto;
}

.collecting h1 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--text-color);
}

.filter-controls {
  margin-bottom: 2rem;
}

.filter-controls h3 {
  margin: 0 0 1rem 0;
  color: var(--text-color);
}

.filter-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.sets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 1.5rem;
}

.set-card {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow);
  overflow: hidden;
}

.set-header {
  padding: 1rem 1.5rem;
  background: linear-gradient(
    135deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  color: var(--interactive-color-contrast);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.set-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.collecting-badge {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
}

.set-stats {
  padding: 1rem 1.5rem;
  background: var(--card-bg);
}

.stat {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.stat:last-child {
  margin-bottom: 0;
}

.stat-label {
  color: var(--text-color);
}

.stat-value {
  font-weight: bold;
  color: var(--text-color);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  margin: 0.5rem 0;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #28a745, #20c997);
  transition: width 0.3s ease;
}

.set-details {
  padding: 1.5rem;
}

.owned-section,
.missing-section {
  margin-bottom: 1.5rem;
}

.owned-section h4,
.missing-section h4 {
  margin: 0 0 0.75rem 0;
  color: var(--text-color);
  font-size: 1rem;
}

.cards-preview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  justify-items: center;
}

.card-mini {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem;
  position: relative;
  text-align: center;
  text-decoration: none;
  color: inherit;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
  max-width: 160px;
}

.card-mini:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.15);
}

.card-mini img {
  width: auto;
  height: 150px;
  max-width: 100%;
  object-fit: contain;
  display: block;
  object-position: center;
  border-radius: 10px;
  background: linear-gradient(135deg, #f3f4ff, #ffffff);
  padding: 0.4rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.card-name {
  font-size: 0.8rem;
  color: var(--text-color);
  display: block;
  line-height: 1.25;
  font-weight: 600;
}

.missing .missing-placeholder {
  width: 100%;
  height: 80px;
  background: var(--card-bg);
  border: 2px dashed #dee2e6;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 0.25rem;
  margin-bottom: 0.25rem;
}

.missing-placeholder span {
  font-size: 0.7rem;
  font-weight: bold;
  color: var(--text-color);
  text-align: center;
  line-height: 1.1;
}

.missing-placeholder small {
  font-size: 0.6rem;
  color: var(--text-color);
}

.more-cards {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 80px;
  background: var(--border-color);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text-color);
  font-weight: bold;
}

.no-data {
  text-align: center;
  padding: 3rem;
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow);
}

.no-data p {
  margin-bottom: 1rem;
  color: var(--text-color);
}

.collection-section {
  margin-top: 3rem;
}

.collection-section h2 {
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card-item {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 8px var(--shadow);
  overflow: hidden;
  transition: transform 0.2s;
}

.card-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.card-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-item-info {
  padding: 1rem;
}

.card-item-info h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--text-color);
}

.card-item-info p {
  margin: 0.25rem 0;
  font-size: 0.9rem;
  color: var(--text-color);
}

.card-status {
  margin-top: 0.75rem;
}

.status {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-right: 0.5rem;
}

.status.collecting {
  background-color: #fff3cd;
  color: #856404;
}

.status.tradable {
  background-color: #d1ecf1;
  color: #0c5460;
}

/* Form styling for collection forms */
.add-card-form .form-group,
.bulk-add-form .form-group {
  margin-bottom: 1rem;
}

.add-card-form label,
.bulk-add-form label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

.add-card-form input[type="text"],
.add-card-form input[type="number"],
.bulk-add-form input[type="text"],
.bulk-add-form input[type="number"] {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  font-size: 1rem;
}

.add-card-form input[type="text"]:focus,
.add-card-form input[type="number"]:focus,
.bulk-add-form input[type="text"]:focus,
.bulk-add-form input[type="number"]:focus {
  outline: none;
  border-color: var(--interactive-color-strong);
  box-shadow: 0 0 0 3px rgba(255, 222, 0, 0.25);
}

.add-card-form .checkbox,
.bulk-add-form .checkbox {
  display: flex;
  align-items: center;
  margin: 0.75rem 0;
}

.add-card-form .checkbox input,
.bulk-add-form .checkbox input {
  margin-right: 0.5rem;
}

/* Status update forms */
.status-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.status-checkbox {
  display: flex;
  align-items: center;
  font-size: 0.85rem;
  cursor: pointer;
}

.status-checkbox input {
  margin-right: 0.5rem;
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
  align-self: flex-start;
}

/* Trading Page Styles */
.trading {
  padding: 2rem 0;
}

.trading-intro {
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow);
}

.trading-intro p {
  color: var(--text-color);
  font-size: 1.1rem;
}

.trading-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card-item.tradable {
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card-item.tradable:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.card-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-item-info {
  padding: 1rem;
}

.card-item-info h3 {
  margin-bottom: 0.5rem;
  color: var(--interactive-color-strong);
  font-size: 1.1rem;
}

.card-item-info p {
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
  color: var(--text-color);
}

.trading-status {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.status-badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: bold;
}

.status-badge.tradable {
  background: #4caf50;
  color: white;
}

.no-tradable {
  text-align: center;
  padding: 3rem 1rem;
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow);
}

.no-tradable h2 {
  color: var(--text-color);
  margin-bottom: 1rem;
}

.no-tradable p {
  color: var(--text-color);
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* Sharing Styles */
.sharing-actions {
  margin-bottom: 2rem;
  position: relative;
}

.share-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.share-buttons .btn {
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-color);
  border: 3px solid rgba(255, 255, 255, 0.5);
  border-radius: 15px;
  padding: 1rem 1.5rem;
  font-size: 1.1rem;
  font-weight: bold;
  font-family: 'Comic Sans MS', cursive, sans-serif;
  text-shadow: 1px 1px 0px rgba(255, 255, 255, 0.5);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.share-buttons .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
  transition: left 0.6s;
}

.share-buttons .btn:hover::before {
  left: 100%;
}

.share-buttons .btn:hover {
  background: var(--card-bg);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  border-color: white;
}

.btn-success {
  background: linear-gradient(135deg, #28a745, #20c997);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 10px;
  font-weight: bold;
  transition: all 0.3s ease;
}

.btn-success:hover {
  background: linear-gradient(135deg, #218838, #1aa085);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(40, 167, 69, 0.4);
}

/* Public List Styles */
.public-list {
  padding: 2rem 0;
}

.list-info {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow);
  margin-bottom: 2rem;
}

.list-stats {
  display: flex;
  gap: 2rem;
  margin-top: 1rem;
}

.list-stats .stat {
  font-weight: bold;
  color: var(--interactive-color-strong);
}

.shared-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card-item.shared {
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px var(--shadow);
}

.empty-list {
  text-align: center;
  padding: 3rem 1rem;
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow);
}

.error-message {
  text-align: center;
  padding: 3rem 1rem;
  background: #ffebee;
  border: 1px solid #f44336;
  border-radius: 8px;
  color: #c62828;
}

/* PWA Install Banner */
.install-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(
    135deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  color: var(--interactive-color-contrast);
  padding: 1rem;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  animation: slideUp 0.3s ease-out;
}

.install-banner-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

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

.install-banner-text strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.install-banner-text p {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.9;
}

.install-banner-actions {
  display: flex;
  gap: 0.5rem;
  margin-left: 1rem;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }

  to {
    transform: translateY(0);
  }

}

/* Mobile optimizations */
@media (max-width: 768px) {
  .install-banner-content {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }

  .install-banner-actions {
    margin-left: 0;
    justify-content: flex-end;
  }

  .install-btn {
    margin-top: 0.5rem;
  }

}

/* Hide install banner on very small screens if needed */
@media (max-width: 480px) {
  .install-banner-text p {
    display: none;
  }

}

/* Comprehensive Responsive Design */

/* Tablet Styles */
@media (max-width: 1024px) {
  .container {
    padding: 0 1rem;
  }

  .navbar-menu {
    gap: 0.75rem;
  }

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

  .stat-card {
    padding: 1rem;
  }

  .grid.grid-2 {
    grid-template-columns: 1fr;
  }

  .trading-grid,
  .shared-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }

}

/* Mobile Styles */
@media (max-width: 768px) {
  body {
    font-size: 14px;
  }

  .navbar {
    padding: 0.75rem 0;
    position: relative;
    z-index: 1100;
  }

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

  .navbar-brand a {
    font-size: 1.25rem;
  }

  .navbar-menu {
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: calc(100% + 0.75rem);
    right: 1rem;
    width: min(280px, calc(100% - 2rem));
    background: var(--navbar-bg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 0.75rem;
    box-shadow: 0 18px 40px var(--shadow);
    display: none;
    z-index: 1200;
  }

  .navbar-menu.show {
    display: flex;
  }

  .navbar-menu a {
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.25);
    text-shadow: 1px 1px 0px rgba(0, 0, 0, 0.3);
    padding: 0.75rem;
    border-radius: 12px;
    width: 100%;
    text-align: left;
    transform: none;
    box-shadow: none;
  }

  .navbar-menu a + a {
    margin-top: 0.25rem;
  }

  .navbar-menu a:hover,
  .navbar-menu a:focus {
    background: rgba(255, 255, 255, 0.22);
    color: #fff;
  }

  .navbar-toggler {
    display: block;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1300;
    position: relative;
  }

  .theme-toggle {
    display: inline-flex;
    margin-left: 0;
    padding: 0.45rem 0.6rem;
  }

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

  .dashboard-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .search-form {
    flex-direction: column;
  }

  .search-form input,
  .search-form button {
    width: 100%;
  }

  .card-item {
    margin-bottom: 1rem;
  }

  .card-item img {
    height: 180px;
  }

  .list-stats {
    flex-direction: column;
    gap: 0.5rem;
  }

}

/* Desktop Styles - Hide hamburger menu */
@media (min-width: 769px) {
  .navbar-toggler {
    display: none;
  }

}

/* Small Mobile Styles */
@media (max-width: 480px) {
  .container {
    padding: 0 0.75rem;
  }

  .navbar-brand a {
    font-size: 1.1rem;
  }

  .stat-card h3 {
    font-size: 1rem;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }

  .card-item-info h3 {
    font-size: 1rem;
  }

  .card-item-info p {
    font-size: 0.8rem;
  }

  .trading-grid,
  .shared-grid {
    grid-template-columns: 1fr;
  }

  .install-banner-content {
    text-align: center;
  }

  .install-banner-actions {
    justify-content: center;
  }

}

/* Large Desktop Styles */
@media (min-width: 1200px) {
  .container {
    max-width: 1400px;
  }

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

  .trading-grid,
  .shared-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }

}

/* Print Styles */
@media print {
  .navbar,
  .btn,
  .install-banner,
  .sharing-actions {
    display: none !important;
  }

  .container {
    max-width: none;
    padding: 0;
  }

  body {
    background: white !important;
    color: black !important;
  }

  .card-item {
    break-inside: avoid;
    page-break-inside: avoid;
  }

}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .btn-primary {
    background: #000 !important;
    color: #fff !important;
    border: 2px solid #fff !important;
  }

  .card-item {
    border: 2px solid #000;
  }

}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .install-banner,
  .card-item {
    animation: none !important;
  }

  * {
    transition: none !important;
  }

}

/* Error Pages */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  text-align: center;
}

.error-content {
  max-width: 600px;
}

.error-content h1 {
  font-size: 6rem;
  font-weight: bold;
  color: var(--interactive-color-strong);
  margin: 0;
  line-height: 1;
}

.error-content h2 {
  font-size: 2rem;
  color: var(--text-color);
  margin: 1rem 0;
}

.error-content p {
  font-size: 1.1rem;
  color: var(--text-color);
  margin-bottom: 2rem;
}

.error-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.error-details {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 8px;
  text-align: left;
  border-left: 4px solid var(--interactive-color);
}

.error-details p {
  margin: 0.5rem 0;
  font-size: 0.9rem;
}

.error-details strong {
  color: var(--text-color);
}

/* Loading States */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--interactive-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-text {
  text-align: center;
  color: var(--interactive-color-strong);
  font-weight: bold;
}

.btn.loading {
  position: relative;
  color: transparent !important;
}

.btn.loading::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid #ffffff;
  border-top: 2px solid transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Progress Indicators */
.progress-container {
  margin: 1rem 0;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* Card Toggle Grid */
.card-toggle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
  max-height: 300px;
  overflow-y: auto;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.card-toggle-item {
  display: flex;
  align-items: center;
  padding: 0.5rem;
  background: var(--card-bg);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  cursor: pointer;
}

.card-toggle-item:hover {
  background: var(--card-bg);
  border-color: var(--interactive-color);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(255, 222, 0, 0.24);
}

.card-toggle-checkbox {
  display: none;
}

.card-toggle-label {
  display: flex;
  align-items: center;
  width: 100%;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-color);
}

.card-toggle-checkbox:checked + .card-toggle-label {
  background: linear-gradient(
    135deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  color: var(--interactive-color-contrast);
  border-radius: 4px;
}

.card-toggle-checkbox:checked + .card-toggle-label::before {
  content: '✓';
  margin-right: 0.5rem;
  font-weight: bold;
  color: white;
}

.card-number {
  font-weight: bold;
  margin-right: 0.5rem;
  min-width: 50px;
}

.card-name {
  flex: 1;
  line-height: 1.3;
}

/* Single Card List */
.single-card-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  padding: 1.5rem 0 2.5rem;
  position: relative;
}

.single-card-view {
  background: var(--card-bg);
  border-radius: 16px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  border: 2px solid var(--interactive-color);
}

.single-card-view:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
  border-color: var(--link-color);
}

.single-card-view .card-header {
  padding: 1rem 1.25rem 0.5rem;
  background: var(--card-bg);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.single-card-view .card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-color);
  margin: 0;
}

.single-card-view .card-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-color);
}

.single-card-view .card-set-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--interactive-color-strong);
  background: rgba(255, 222, 0, 0.18);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  text-decoration: none;
}

.single-card-view .card-set-badge:hover {
  background: rgba(255, 222, 0, 0.3);
}

.single-card-view .card-set-badge--static {
  cursor: default;
}

.single-card-view .card-number {
  font-weight: 600;
  color: var(--text-color);
}

.single-card-view .card-content {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0 1.25rem 1rem;
  align-items: flex-start;
}

.single-card-view .card-image-section {
  flex: 0 0 120px;
  max-width: 120px;
}

.single-card-view .card-image-display {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
  background: #f5f5f5;
}

.single-card-view .card-details-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--text-color);
  min-width: 0;
}

.single-card-view .detail-row {
  display: flex;
  gap: 0.35rem;
  line-height: 1.4;
}

.single-card-view .detail-row strong {
  font-weight: 600;
  color: var(--text-color);
}

.single-card-view .card-footer {
  margin-top: auto;
  padding: 0.75rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.single-card-view .price-button {
  align-self: flex-start;
  background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
  color: #fff;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
  text-decoration: none;
}

.single-card-view .price-button--link {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  cursor: pointer;
}

.single-card-view .price-button .price-value {
  display: block;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.single-card-view .price-button .price-meta {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.1rem;
  font-weight: 600;
}

.single-card-view .price-button .price-meta--timestamp {
  opacity: 0.85;
}

.single-card-view .price-button .price-source-link {
  color: inherit;
  text-decoration: underline;
}

.single-card-view .card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.single-card-view .tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--text-color);
  letter-spacing: 0.02em;
  border: none;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.single-card-view .tag:hover:not(.tag-disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}

.single-card-view .tag-disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none !important;
}

.single-card-view .tag-active.collecting-tag {
  background: rgba(46, 125, 50, 0.2);
  color: var(--success-color);
}

.single-card-view .tag-active.tradable-tag {
  background: rgba(255, 107, 53, 0.2);
  color: var(--accent-primary);
}

.single-card-view .tag-active.doubles-tag {
  background: rgba(123, 97, 255, 0.18);
  color: #6c5ce7;
}

.single-card-view .tag-active.favorite-tag {
  background: rgba(255, 193, 7, 0.2);
  color: #b8860b;
}

.single-card-view .quantity-info {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-color);
}

.single-card-view .card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.single-card-view .card-actions--placeholder {
  min-height: 2rem;
}

.single-card-view .add-to-collection-button {
  background: linear-gradient(135deg, #28a745, #34c759);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(40, 167, 69, 0.3);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.single-card-view .add-to-collection-button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(40, 167, 69, 0.4);
}

.single-card-view .add-to-collection-button:disabled {
  background: rgba(40, 167, 69, 0.2);
  color: rgba(255, 255, 255, 0.7);
  cursor: not-allowed;
  box-shadow: none;
}

.single-card-view .trade-button {
  background: linear-gradient(
    135deg,
    var(--interactive-color),
    var(--interactive-color-strong)
  );
  color: var(--interactive-color-contrast);
  border: none;
  border-radius: 999px;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(255, 222, 0, 0.32);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.single-card-view .trade-button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(255, 222, 0, 0.4);
}

.single-card-view .trade-button:disabled {
  background: rgba(255, 222, 0, 0.25);
  color: rgba(45, 45, 45, 0.65);
  cursor: not-allowed;
  box-shadow: none;
}

.single-card-view .card-set-link {
  color: var(--interactive-color-strong);
  text-decoration: none;
  font-weight: 600;
}

.single-card-view .card-set-link:hover {
  text-decoration: underline;
}

.single-card-list .loading-spinner-container {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem 0;
  color: var(--text-color);
}

.single-card-list .loading-spinner {
  width: 36px;
  height: 36px;
  border: 4px solid rgba(255, 222, 0, 0.18);
  border-top-color: var(--interactive-color);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

.single-card-list .error-message {
  grid-column: 1 / -1;
  padding: 1rem;
  border-radius: 12px;
  background: rgba(220, 53, 69, 0.15);
  color: #dc3545;
  text-align: center;
  font-weight: 600;
}

@media (max-width: 1200px) {
  .single-card-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}

@media (max-width: 768px) {
  .single-card-list {
    grid-template-columns: repeat(1, minmax(0, 1fr));
    gap: 1rem;
  }

  .single-card-view .card-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .single-card-view .card-image-section {
    max-width: 160px;
  }

  .single-card-view .card-details-section {
    align-items: center;
  }

  .single-card-view .detail-row {
    justify-content: center;
  }

  .single-card-view .card-footer {
    align-items: center;
  }

  .single-card-view .card-actions {
    flex-direction: column;
    width: 100%;
  }

  .single-card-view .quantity-info {
    text-align: center;
  }

}