/* ==========================================================================
   Components: Cards, Tables, Buttons, Badges, Forms, Modals, etc.
   BoostAODE vs AODE Web App
   ========================================================================== */

/* --------------------------------------------------------------------------
   Credits Modal
   -------------------------------------------------------------------------- */

.modal--credits {
  max-width: 560px;
}

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

.credits-section:last-child {
  margin-bottom: 0;
}

.credits-section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-light);
}

.credits-section-title svg {
  color: var(--accent-primary);
}

.credits-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background-color: var(--bg-elevated);
  border-radius: var(--radius-lg);
}

.author-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  flex-shrink: 0;
}

.author-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  min-width: 0;
}

.author-name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.author-role {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.author-links {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xs);
}

.author-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.author-link:hover {
  background-color: var(--accent-light);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-md);
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--bg-elevated);
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.tech-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  color: #ffffff;
}

.tech-icon--html {
  background: linear-gradient(135deg, #e44d26, #f16529);
}

.tech-icon--css {
  background: linear-gradient(135deg, #264de4, #2965f1);
}

.tech-icon--js {
  background: linear-gradient(135deg, #f7df1e, #e8ce00);
}

.tech-icon--chartjs {
  background: linear-gradient(135deg, #ff6384, #ff9f40);
}

.tech-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tech-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.tech-version {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.libraries-list {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.library-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
  text-decoration: none;
  min-width: 100px;
  flex: 1;
}

.library-item:hover {
  border-color: var(--accent-primary);
  background-color: var(--accent-light);
}

.library-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.library-desc {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.contributors-list {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.contributor-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
  min-width: 140px;
  flex: 1;
}

.contributor-item:hover {
  border-color: var(--accent-primary);
  background-color: var(--accent-light);
}

.contributor-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contributor-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.contributor-desc {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.design-credits {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  background-color: var(--bg-elevated);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
}

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

.design-link {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.design-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.btn-credits {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn-credits svg {
  width: 16px;
  height: 16px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

@media (max-width: 767px) {
  .credits-author {
    flex-direction: column;
    text-align: center;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  transition: background-color var(--transition-base),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

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

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
  gap: var(--spacing-sm);
}

.card-header h2,
.card-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.card-body {
  flex: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-top: var(--spacing-md);
  margin-top: var(--spacing-md);
  border-top: 1px solid var(--border-light);
  gap: var(--spacing-sm);
}

/* --------------------------------------------------------------------------
   Stat Cards
   -------------------------------------------------------------------------- */

.stat-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  transition: background-color var(--transition-base),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

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

.stat-card--secondary {
  border-left-color: var(--accent-secondary);
}

.stat-card--success {
  border-left-color: var(--color-success);
}

.stat-card--warning {
  border-left-color: var(--color-warning);
}

.stat-card--error {
  border-left-color: var(--color-error);
}

.stat-card--info {
  border-left-color: var(--color-info);
}

.stat-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--accent-light);
  color: var(--accent-primary);
  flex-shrink: 0;
}

.stat-card--secondary .stat-card-icon {
  background-color: var(--accent-secondary-light);
  color: var(--accent-secondary);
}

.stat-card--success .stat-card-icon {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.stat-card--warning .stat-card-icon {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.stat-card--error .stat-card-icon {
  background-color: var(--color-error-light);
  color: var(--color-error);
}

.stat-card--info .stat-card-icon {
  background-color: var(--color-info-light);
  color: var(--color-info);
}

.stat-card-icon svg {
  width: 22px;
  height: 22px;
}

.stat-card-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.stat-card-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

.stat-card-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background-color: var(--bg-card);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.data-table thead {
  position: sticky;
  top: 0;
  z-index: 10;
}

.data-table th {
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
  transition: background-color var(--transition-base);
  user-select: none;
}

.data-table th.sortable {
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.data-table th.sortable:hover {
  color: var(--text-primary);
  background-color: var(--bg-hover);
}

.data-table th .sort-icon {
  display: inline-flex;
  flex-direction: column;
  margin-left: var(--spacing-xs);
  font-size: 0.6rem;
  line-height: 1;
  color: var(--text-muted);
  vertical-align: middle;
}

.data-table th .sort-icon .sort-asc,
.data-table th .sort-icon .sort-desc {
  opacity: 0.3;
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.data-table th.sort-active-asc .sort-icon .sort-asc,
.data-table th.sort-active-desc .sort-icon .sort-desc {
  opacity: 1;
  color: var(--accent-primary);
}

.data-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  vertical-align: middle;
  transition: background-color var(--transition-fast);
}

/* Alternating row colors */
.data-table tbody tr:nth-child(even) {
  background-color: var(--bg-input);
}

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

/* Cell color classes */
.cell-positive {
  color: var(--color-success);
  font-weight: 600;
}

.cell-negative {
  color: var(--color-error);
  font-weight: 600;
}

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

.cell-highlight {
  background-color: var(--bg-selected);
}

.cell-mono {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  user-select: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Primary */
.btn-primary {
  background-color: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

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

/* Secondary */
.btn-secondary {
  background-color: transparent;
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

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

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

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

/* Icon-only */
.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

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

/* Sizes */
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
}

.btn-sm svg {
  width: 14px;
  height: 14px;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  border-radius: var(--radius-lg);
}

.btn-lg svg {
  width: 20px;
  height: 20px;
}

/* --------------------------------------------------------------------------
   Badges
   -------------------------------------------------------------------------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 2px var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  line-height: 1.5;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

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

.badge-error {
  background-color: var(--color-error-light);
  color: var(--color-error);
}

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

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

.badge-neutral {
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
}

.badge-accent {
  background-color: var(--accent-light);
  color: var(--accent-primary);
}

/* Significance badges for p-value stars */
.badge-significance {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: 700;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.badge-significance--high {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.badge-significance--medium {
  background-color: var(--color-info-light);
  color: var(--color-info);
}

.badge-significance--low {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.badge-significance--none {
  background-color: var(--bg-elevated);
  color: var(--text-muted);
}

/* Significance badge p-value star classes (used by getSignificanceBadge in data.js) */
.sig-3 { background-color: var(--color-success-light); color: var(--color-success); }
.sig-2 { background-color: var(--color-info-light); color: var(--color-info); }
.sig-1 { background-color: var(--color-warning-light); color: var(--color-warning); }
.sig-ns { background-color: var(--bg-elevated); color: var(--text-muted); }

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

select,
input[type="text"],
input[type="number"],
input[type="search"],
textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  outline: none;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              background-color var(--transition-base);
  appearance: none;
  -webkit-appearance: none;
}

select {
  padding-right: var(--spacing-xl);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239090b0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-sm) center;
  background-size: 16px;
  cursor: pointer;
}

select:focus,
input[type="text"]:focus,
input[type="number"]:focus,
input[type="search"]:focus,
textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

input[type="search"]::-webkit-search-cancel-button {
  -webkit-appearance: none;
}

/* Placeholder */
::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

/* Radio group as segmented control */
.radio-group {
  display: inline-flex;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--bg-input);
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.radio-group input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.radio-group label {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  border-right: 1px solid var(--border-color);
  transition: background-color var(--transition-fast),
              color var(--transition-fast);
  user-select: none;
  white-space: nowrap;
}

.radio-group label:last-of-type {
  border-right: none;
}

.radio-group label:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.radio-group input[type="radio"]:checked + label {
  background-color: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

/* --------------------------------------------------------------------------
   Modals
   -------------------------------------------------------------------------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

.modal {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 600px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  transform: translateY(20px) scale(0.95);
  transition: transform var(--transition-base),
              background-color var(--transition-base),
              border-color var(--transition-base);
}

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

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}

.modal-header h2,
.modal-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

.modal-close svg {
  width: 18px;
  height: 18px;
}

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Tooltips
   -------------------------------------------------------------------------- */

.tooltip {
  position: relative;
  display: inline-flex;
}

.tooltip-content {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: #1a1a2e;
  color: #e8e8f0;
  font-size: var(--font-size-xs);
  font-weight: 500;
  line-height: 1.4;
  white-space: nowrap;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.tooltip-content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: #1a1a2e;
}

.tooltip:hover .tooltip-content {
  opacity: 1;
  visibility: visible;
}

/* Tooltip positions */
.tooltip-content--bottom {
  bottom: auto;
  top: calc(100% + 8px);
}

.tooltip-content--bottom::after {
  top: auto;
  bottom: 100%;
  border-top-color: transparent;
  border-bottom-color: #1a1a2e;
}

.tooltip-content--left {
  bottom: auto;
  top: 50%;
  left: auto;
  right: calc(100% + 8px);
  transform: translateY(-50%);
}

.tooltip-content--left::after {
  top: 50%;
  left: 100%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-left-color: #1a1a2e;
}

.tooltip-content--right {
  bottom: auto;
  top: 50%;
  left: calc(100% + 8px);
  transform: translateY(-50%);
}

.tooltip-content--right::after {
  top: 50%;
  left: auto;
  right: 100%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-right-color: #1a1a2e;
}

/* --------------------------------------------------------------------------
   Loading Overlay & Spinner
   -------------------------------------------------------------------------- */

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--spacing-md);
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.spinner-lg {
  width: 56px;
  height: 56px;
  border-width: 4px;
}

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

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

/* Inline loading */
.loading-inline {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   Tabs
   -------------------------------------------------------------------------- */

.tab-group {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  transition: border-color var(--transition-base);
}

.tab-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border: none;
  border-bottom: 2px solid transparent;
  background: none;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition-fast),
              border-color var(--transition-fast),
              background-color var(--transition-fast);
  user-select: none;
}

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

.tab-item.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

.tab-item svg {
  width: 16px;
  height: 16px;
}

.tab-content {
  padding-top: var(--spacing-lg);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) 0;
}

.pagination-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--spacing-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background-color: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast);
  user-select: none;
}

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

.pagination-btn.active {
  background-color: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.pagination-btn svg {
  width: 16px;
  height: 16px;
}

.pagination-ellipsis {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  user-select: none;
}

/* --------------------------------------------------------------------------
   Progress Bars (Win/Tie/Loss visualization)
   -------------------------------------------------------------------------- */

.progress-bar {
  display: flex;
  width: 100%;
  height: 8px;
  border-radius: var(--radius-full);
  overflow: hidden;
  background-color: var(--bg-elevated);
  transition: background-color var(--transition-base);
}

.progress-bar--lg {
  height: 12px;
}

.progress-bar--sm {
  height: 4px;
}

.progress-segment {
  height: 100%;
  transition: width var(--transition-base);
}

.progress-segment--win {
  background-color: var(--color-success);
}

.progress-segment--tie {
  background-color: var(--text-muted);
}

.progress-segment--loss {
  background-color: var(--color-error);
}

.progress-segment--accent {
  background-color: var(--accent-primary);
}

.progress-segment--secondary {
  background-color: var(--accent-secondary);
}

/* Labeled progress bar */
.progress-labeled {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.progress-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Utility Classes — Text
   -------------------------------------------------------------------------- */

.text-success  { color: var(--color-success); }
.text-error    { color: var(--color-error); }
.text-warning  { color: var(--color-warning); }
.text-info     { color: var(--color-info); }
.text-muted    { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-accent   { color: var(--accent-primary); }

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

.text-xs  { font-size: var(--font-size-xs); }
.text-sm  { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg  { font-size: var(--font-size-lg); }
.text-xl  { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }

.font-mono   { font-family: var(--font-mono); }
.font-bold   { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.font-normal { font-weight: 400; }

/* --------------------------------------------------------------------------
   Utility Classes — Spacing (margins)
   -------------------------------------------------------------------------- */

.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-2xl { margin-top: var(--spacing-2xl); }

.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-2xl { margin-bottom: var(--spacing-2xl); }

.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); }

.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); }

/* Padding utilities */
.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); }

/* --------------------------------------------------------------------------
   Utility Classes — Display & Visibility
   -------------------------------------------------------------------------- */

.hidden {
  display: none !important;
}

.visible {
  display: block;
}

.invisible {
  visibility: hidden;
}

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

/* --------------------------------------------------------------------------
   Utility Classes — Overflow & Truncate
   -------------------------------------------------------------------------- */

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.overflow-auto {
  overflow: auto;
}

.overflow-hidden {
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   Utility Classes — Width
   -------------------------------------------------------------------------- */

.w-full { width: 100%; }
.w-auto { width: auto; }
.min-w-0 { min-width: 0; }

/* --------------------------------------------------------------------------
   Divider
   -------------------------------------------------------------------------- */

.divider {
  height: 1px;
  background-color: var(--border-light);
  border: none;
  margin: var(--spacing-md) 0;
  transition: background-color var(--transition-base);
}

/* --------------------------------------------------------------------------
   Empty State
   -------------------------------------------------------------------------- */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  color: var(--text-muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.empty-state-text {
  font-size: var(--font-size-sm);
  max-width: 400px;
}

/* --------------------------------------------------------------------------
   Responsive Components
   -------------------------------------------------------------------------- */

@media (max-width: 767px) {
  .card {
    padding: var(--spacing-md);
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .stat-card {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .stat-card-value {
    font-size: var(--font-size-xl);
  }

  .data-table th,
  .data-table td {
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .modal {
    width: 95%;
    max-height: 90vh;
    border-radius: var(--radius-lg);
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--spacing-md);
  }

  .tab-item {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
  }

  .pagination-btn {
    min-width: 32px;
    height: 32px;
  }

  .radio-group label {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
  }

  /* Hide optional columns on mobile */
  .hide-mobile {
    display: none;
  }
}

@media (min-width: 768px) {
  .hide-desktop {
    display: none;
  }
}