/**
 * Commerce Learning Hub - Interactive Components
 * 
 * Tabs, accordions, tooltips, progress bars, steppers.
 */

/* ============================================
   TABS
   ============================================ */
.tabs {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.tabs__list {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  scrollbar-width: thin;
}

.tabs__list::-webkit-scrollbar {
  height: 4px;
}

.tabs__tab {
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: -1px;
}

.tabs__tab:hover {
  color: var(--color-text);
  background: var(--color-surface-elevated);
}

.tabs__tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tabs__tab:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.tabs__panel {
  padding: var(--space-6) 0;
  display: none;
  animation: fadeIn 0.25s ease;
}

.tabs__panel--active {
  display: block;
}

/* Vertical tabs variant */
.tabs--vertical {
  flex-direction: row;
  gap: var(--space-4);
}

.tabs--vertical .tabs__list {
  flex-direction: column;
  border-bottom: none;
  border-right: 1px solid var(--color-border);
  min-width: 180px;
}

.tabs--vertical .tabs__tab {
  border-bottom: none;
  border-right: 2px solid transparent;
  margin-bottom: 0;
  margin-right: -1px;
  text-align: left;
  justify-content: flex-start;
}

.tabs--vertical .tabs__tab--active {
  border-right-color: var(--color-primary);
}

@media (max-width: 640px) {
  .tabs--vertical {
    flex-direction: column;
  }
  .tabs--vertical .tabs__list {
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    min-width: 0;
  }
  .tabs--vertical .tabs__tab {
    border-right: none;
    border-bottom: 2px solid transparent;
    margin-right: 0;
    margin-bottom: -1px;
  }
  .tabs--vertical .tabs__tab--active {
    border-right-color: transparent;
    border-bottom-color: var(--color-primary);
  }
}

/* ============================================
   ACCORDION
   ============================================ */
.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.accordion__item {
  border-bottom: 1px solid var(--color-border);
}

.accordion__item:last-child {
  border-bottom: none;
}

.accordion__trigger {
  width: 100%;
  padding: var(--space-4);
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  cursor: pointer;
  font-weight: var(--font-medium);
  font-size: var(--text-base);
  color: var(--color-text);
  text-align: left;
  transition: background var(--transition-fast);
}

.accordion__trigger:hover {
  background: var(--color-surface-elevated);
}

.accordion__trigger:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.accordion__icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base);
  color: var(--color-text-muted);
}

.accordion__item--open .accordion__icon {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.accordion__item--open .accordion__content {
  max-height: 2000px;
}

.accordion__body {
  padding: 0 var(--space-4) var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

/* ============================================
   TOOLTIPS
   ============================================ */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip__content {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  padding: var(--space-2) var(--space-3);
  background: var(--color-text);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-md);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-fast);
  z-index: var(--z-tooltip);
  box-shadow: var(--shadow-lg);
  max-width: 280px;
  white-space: normal;
  text-align: center;
  line-height: var(--leading-normal);
}

.tooltip__content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--color-text);
}

.tooltip:hover .tooltip__content,
.tooltip:focus-within .tooltip__content,
.tooltip__trigger:focus + .tooltip__content,
.tooltip--open .tooltip__content {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Position variants */
.tooltip--right .tooltip__content {
  bottom: auto;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
}

.tooltip--right .tooltip__content::after {
  top: 50%;
  left: auto;
  right: 100%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-right-color: var(--color-text);
}

.tooltip--right:hover .tooltip__content,
.tooltip--right:focus-within .tooltip__content {
  transform: translateY(-50%) translateX(0);
}

.tooltip--bottom .tooltip__content {
  bottom: auto;
  top: calc(100% + 8px);
  transform: translateX(-50%) translateY(4px);
}

.tooltip--bottom .tooltip__content::after {
  top: auto;
  bottom: 100%;
  border: 5px solid transparent;
  border-bottom-color: var(--color-text);
}

.tooltip--bottom:hover .tooltip__content,
.tooltip--bottom:focus-within .tooltip__content {
  transform: translateX(-50%) translateY(0);
}

.tooltip--left .tooltip__content {
  bottom: auto;
  right: calc(100% + 8px);
  left: auto;
  top: 50%;
  transform: translateY(-50%) translateX(4px);
}

.tooltip--left .tooltip__content::after {
  top: 50%;
  left: 100%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-left-color: var(--color-text);
}

.tooltip--left:hover .tooltip__content,
.tooltip--left:focus-within .tooltip__content {
  transform: translateY(-50%) translateX(0);
}

.tooltip__trigger {
  cursor: help;
  border-bottom: 1px dashed currentColor;
}

/* ============================================
   PROGRESS BAR
   ============================================ */
.progress {
  width: 100%;
  height: 8px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress__bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
  position: relative;
}

.progress__bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: shimmer 2s infinite;
}

.progress--sm { height: 4px; }
.progress--lg { height: 12px; }

.progress--success .progress__bar { background: var(--color-success); }
.progress--warning .progress__bar { background: var(--color-warning); }
.progress--error .progress__bar { background: var(--color-error); }

/* Indeterminate */
.progress--indeterminate .progress__bar {
  width: 30% !important;
  animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(400%); }
}

.progress-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
}

.progress-label__value {
  font-weight: var(--font-semibold);
  color: var(--color-primary);
}

/* ============================================
   STEPPER (Multi-step wizard)
   ============================================ */
.stepper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.stepper__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
  position: relative;
}

.stepper__indicator {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--color-surface-elevated);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  transition: all var(--transition-base);
  position: relative;
  z-index: 1;
}

.stepper__step--active .stepper__indicator {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}

.stepper__step--complete .stepper__indicator {
  background: var(--color-success);
  border-color: var(--color-success);
  color: white;
}

.stepper__step--complete .stepper__indicator::before {
  content: '✓';
}

.stepper__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  font-weight: var(--font-medium);
}

.stepper__step--active .stepper__label {
  color: var(--color-primary);
}

.stepper__step--complete .stepper__label {
  color: var(--color-success);
}

.stepper__connector {
  flex: 1;
  height: 2px;
  background: var(--color-border);
  margin: 0 -0.5rem;
  margin-bottom: 1.5rem;
  transition: background var(--transition-base);
}

.stepper__connector--complete {
  background: var(--color-success);
}

@media (max-width: 640px) {
  .stepper__label { display: none; }
  .stepper__indicator { width: 2rem; height: 2rem; font-size: var(--text-sm); }
}

/* ============================================
   INFO BOX (callouts)
   ============================================ */
.info-box {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  display: flex;
  gap: var(--space-3);
  margin: var(--space-4) 0;
}

.info-box__icon {
  font-size: var(--text-xl);
  flex-shrink: 0;
}

.info-box__content {
  flex: 1;
  font-size: var(--text-sm);
}

.info-box__title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.info-box--info {
  background: rgba(59, 130, 246, 0.08);
  border-color: var(--color-info);
  color: var(--color-text);
}

.info-box--success {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--color-success);
}

.info-box--warning {
  background: rgba(245, 158, 11, 0.08);
  border-color: var(--color-warning);
}

.info-box--error {
  background: rgba(239, 68, 68, 0.08);
  border-color: var(--color-error);
}