/* =============================================================================
   CARPOOL MODULE STYLES
   Mobile-first, consistent with Wampums design tokens and UI patterns
   ============================================================================= */

:root {
  --carpool-surface: var(--color-surface, #ffffff);
  --carpool-surface-muted: var(--color-secondary, #e7f2ee);
  --carpool-surface-subtle: #f8fbf9;
  --carpool-border: var(--color-border, #d3e3dc);
  --carpool-border-strong: var(--color-border-light, #e2efea);
  --carpool-radius: var(--radius-lg, 1rem);
  --carpool-radius-sm: var(--radius-md, 0.75rem);
  --carpool-shadow: var(--shadow-md, 0 6px 18px rgb(15 122 90 / 0.12));
  --carpool-shadow-hover: var(--shadow-lg, 0 12px 30px rgb(15 122 90 / 0.14));
  --carpool-gap: var(--space-md, 1rem);
  --carpool-gap-lg: var(--space-lg, 1.5rem);
  --carpool-highlight: var(--color-primary, #0f7a5a);
  --carpool-highlight-strong: var(--color-primary-dark, #0b5b43);
  --carpool-highlight-soft: var(--color-primary-light, #18b29a);
  --carpool-text: #1d2f2a;
  --carpool-text-muted: var(--color-text-muted, #6f8a81);
  --carpool-warning: #bbe69e;
  --carpool-warning-soft: #af861d;
  --carpool-success: var(--color-success, #1a8f6b);
  --carpool-touch-target: var(--touch-target-min, 44px);
}

/* Activity Info Card */
.activity-info-card {
  background: var(--carpool-highlight-strong);
  color: var(--color-selected-text, #ffffff);
  padding: var(--space-lg);
  border-radius: var(--carpool-radius);
  margin-bottom: var(--carpool-gap-lg);
  box-shadow: var(--carpool-shadow);
  display: grid;
  gap: var(--carpool-gap);
}

.activity-info-card h2 {
  margin: 0;
  font-size: var(--font-size-2xl, 1.5rem);
  line-height: var(--line-height-tight, 1.25);
}

.activity-info-card__date {
  font-size: var(--font-size-base, 1rem);
  opacity: 0.9;
}

.activity-info-card__details {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--carpool-gap);
}

.info-block {
  background: rgb(255 255 255 / 0.12);
  padding: var(--space-md);
  border-radius: var(--carpool-radius-sm);
  border: 1px solid rgb(255 255 255 / 0.2);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.2);
}

.info-block strong {
  display: block;
  margin-bottom: var(--space-xs, 0.25rem);
  font-size: var(--font-size-lg, 1.125rem);
}

.info-block p {
  margin: 0.25rem 0;
  font-size: var(--font-size-sm, 0.875rem);
  line-height: var(--line-height-normal, 1.5);
}

/* Action Buttons */
.carpool-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--carpool-gap);
  margin-bottom: var(--carpool-gap-lg);
}

.button--large {
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-base, 1rem);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm, 0.5rem);
  background: var(--carpool-highlight-strong);
  color: var(--color-selected-text, #ffffff);
  border: 1px solid var(--carpool-highlight);
  border-radius: var(--carpool-radius-sm);
  min-height: var(--carpool-touch-target);
  font-weight: var(--font-weight-semibold, 600);
  box-shadow: var(--shadow-base, 0 3px 10px rgb(15 122 90 / 0.08));
  transition: transform var(--transition-base, 250ms ease), box-shadow var(--transition-base, 250ms ease), filter var(--transition-base, 250ms ease);
}

.button--large .icon {
  inline-size: 24px;
  block-size: 24px;
}

.button--large:hover {
  transform: translateY(-1px);
  box-shadow: var(--carpool-shadow-hover);
  filter: brightness(1.03);
}

.button--large:focus-visible,
.carpool-offer-card__passengers summary:focus-visible,
.carpool-section--past summary:focus-visible {
  outline: 3px solid var(--carpool-highlight-soft);
  outline-offset: 2px;
  border-radius: var(--radius-sm, 0.5rem);
}

/* Carpool Section */
.carpool-section {
  margin-bottom: var(--space-2xl, 3rem);
}

.carpool-section__title {
  font-size: var(--font-size-xl, 1.25rem);
  margin-bottom: var(--carpool-gap);
  color: var(--carpool-text);
  border-left: 4px solid var(--carpool-highlight);
  padding-left: var(--space-sm, 0.5rem);
  letter-spacing: 0.01em;
}

.carpool-section--past {
  opacity: 0.9;
}

.carpool-section--past summary {
  cursor: pointer;
  padding: var(--space-sm) 0;
  color: var(--carpool-text-muted);
}

/* Shared Card Shells */
.activity-card,
.carpool-offer-card,
.assignment-card {
  background: var(--carpool-surface);
  border: 1px solid var(--carpool-border);
  border-radius: var(--carpool-radius);
  padding: var(--space-lg);
  box-shadow: var(--carpool-shadow);
  transition: transform var(--transition-base, 250ms ease), box-shadow var(--transition-base, 250ms ease);
}

.activity-card:hover,
.carpool-offer-card:hover,
.assignment-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--carpool-shadow-hover);
}

.activity-card--past {
  opacity: 0.85;
  background: var(--carpool-surface-muted);
  border-style: dashed;
}

/* Activity Cards */
.activity-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--carpool-gap);
}

.activity-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-sm, 0.5rem);
  gap: var(--space-sm, 0.5rem);
}

.activity-card__title {
  margin: 0;
  font-size: var(--font-size-lg, 1.125rem);
  color: var(--carpool-text);
  flex: 1;
  line-height: var(--line-height-tight, 1.25);
}

.activity-card__date {
  background: var(--carpool-surface-muted);
  color: var(--carpool-highlight-strong);
  padding: var(--space-xs, 0.25rem) var(--space-sm, 0.5rem);
  border-radius: var(--radius-full, 9999px);
  font-size: var(--font-size-sm, 0.875rem);
  white-space: nowrap;
  border: 1px solid var(--carpool-border);
}

.activity-card__description {
  color: var(--carpool-text-muted);
  margin: var(--space-xs, 0.25rem) 0 var(--space-md, 1rem) 0;
  font-size: var(--font-size-base, 1rem);
  line-height: var(--line-height-relaxed, 1.75);
}

.activity-card__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 0.5rem);
  margin: var(--space-md, 1rem) 0;
  padding: var(--space-md);
  background: var(--carpool-surface-subtle);
  border-radius: var(--carpool-radius-sm);
  border: 1px solid var(--carpool-border-strong);
}

.activity-detail strong {
  display: block;
  color: var(--carpool-text);
  margin-bottom: var(--space-xs, 0.25rem);
  font-size: var(--font-size-sm, 0.9rem);
  letter-spacing: 0.01em;
}

.activity-detail__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs, 0.25rem);
  font-size: var(--font-size-sm, 0.9rem);
  color: var(--carpool-text-muted);
}

.activity-card__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-sm, 0.5rem);
  margin: var(--space-md, 1rem) 0;
  padding: var(--space-sm, 0.75rem);
  background: var(--carpool-surface-muted);
  border-radius: var(--carpool-radius-sm);
  border: 1px dashed var(--carpool-border);
}

.stat {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 0.5rem);
  font-size: var(--font-size-sm, 0.9rem);
  color: var(--carpool-text-muted);
  min-height: var(--carpool-touch-target);
}

.stat .icon {
  color: var(--carpool-highlight);
  font-size: 1.15rem;
}

.activity-card__actions {
  display: flex;
  gap: var(--space-sm, 0.5rem);
  margin-top: var(--space-md, 1rem);
  flex-wrap: wrap;
}

/* Carpool Offers */
.carpool-offers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--carpool-gap);
}

.carpool-offer-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md, 1rem);
  gap: var(--space-sm, 0.5rem);
}

.carpool-offer-card__driver {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 0.5rem);
  flex: 1;
}

.carpool-offer-card__driver strong {
  font-size: var(--font-size-lg, 1.1rem);
  color: var(--carpool-text);
}

.carpool-offer-card__actions {
  display: flex;
  gap: var(--space-xs, 0.25rem);
}

.carpool-offer-card__vehicle {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 0.5rem);
  padding: var(--space-sm, 0.75rem);
  background: var(--carpool-surface-subtle);
  border-radius: var(--carpool-radius-sm);
  margin-bottom: var(--space-sm, 1rem);
  color: var(--carpool-text-muted);
  font-size: var(--font-size-sm, 0.95rem);
  border: 1px solid var(--carpool-border-strong);
}

.carpool-offer-card__vehicle .icon {
  color: var(--carpool-highlight);
  flex-shrink: 0;
}

.carpool-offer-card__notes {
  padding: var(--space-sm, 0.75rem);
  background: var(--carpool-warning-soft);
  border-left: 4px solid var(--carpool-warning);
  border-radius: var(--radius-sm, 0.5rem);
  margin-bottom: var(--space-md, 1rem);
  font-size: var(--font-size-sm, 0.9rem);
  color: var(--carpool-text);
}

.carpool-offer-card__capacity {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 0.75rem);
  margin-bottom: var(--space-md, 1rem);
}

.capacity-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 0.75rem);
}

.capacity-indicator__label {
  min-width: 70px;
  font-size: var(--font-size-sm, 0.9rem);
  color: var(--carpool-text-muted);
  font-weight: var(--font-weight-medium, 500);
}

.capacity-indicator__bar {
  flex: 1;
  height: 24px;
  background: var(--carpool-surface-muted);
  border-radius: var(--radius-full, 9999px);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--carpool-border);
}

.capacity-indicator__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--carpool-highlight) 0%, var(--carpool-highlight-soft) 100%);
  transition: width var(--transition-base, 250ms ease);
}

.capacity-indicator__text {
  min-width: 60px;
  text-align: right;
  font-size: var(--font-size-sm, 0.9rem);
  color: var(--carpool-text);
  font-weight: var(--font-weight-medium, 500);
}

.carpool-offer-card__passengers {
  margin-bottom: var(--space-md, 1rem);
}

.carpool-offer-card__passengers summary {
  cursor: pointer;
  padding: var(--space-sm, 0.75rem);
  background: var(--carpool-surface-subtle);
  border-radius: var(--carpool-radius-sm);
  font-weight: var(--font-weight-semibold, 600);
  color: var(--carpool-text);
  border: 1px solid var(--carpool-border);
  transition: background var(--transition-base, 250ms ease), color var(--transition-base, 250ms ease);
}

.carpool-offer-card__passengers summary:hover {
  background: var(--carpool-surface-muted);
  color: var(--carpool-highlight);
}

.passenger-list {
  list-style: none;
  padding: 0;
  margin: var(--space-sm, 0.75rem) 0 0 0;
}

.passenger-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm, 0.75rem);
  border-bottom: 1px solid var(--carpool-border);
}

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

/* Assignments */
.assignments-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--carpool-gap);
}

.assignment-card__header {
  margin-bottom: var(--space-md, 1rem);
  padding-bottom: var(--space-sm, 0.75rem);
  border-bottom: 2px solid var(--carpool-border-strong);
}

.assignment-card__header strong {
  font-size: var(--font-size-lg, 1.1rem);
  color: var(--carpool-text);
}

.assignment-card__ride {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md, 1rem);
  background: var(--carpool-surface-subtle);
  border-radius: var(--carpool-radius-sm);
  margin-bottom: var(--space-sm, 0.75rem);
  gap: var(--space-md, 1rem);
  border: 1px solid var(--carpool-border);
}

.assignment-card__ride:last-child {
  margin-bottom: 0;
}

.assignment-card__details {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm, 0.75rem);
  flex: 1;
}

.assignment-card__details .icon {
  color: var(--carpool-highlight);
  flex-shrink: 0;
  margin-top: 2px;
}

.assignment-card__details p {
  margin: 0;
  font-size: var(--font-size-sm, 0.9rem);
  color: var(--carpool-text-muted);
}

.assignment-card__details strong {
  color: var(--carpool-text);
}

/* Unassigned Participants */
.unassigned-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-sm, 0.75rem);
}

.unassigned-item {
  color: var(--carpool-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md, 1rem);
  background: var(--carpool-surface);
  border: 1px solid #ffe082;
  border-radius: var(--carpool-radius-sm);
  gap: var(--space-md, 1rem);
}

.unassigned-item__info {
  flex: 1;
}

.unassigned-item__info strong {
  display: block;
  margin-bottom: var(--space-xs, 0.5rem);
  color: var(--carpool-text);
}

.unassigned-item__status {
  display: flex;
  gap: var(--space-sm, 0.5rem);
  flex-wrap: wrap;
}

/* Child Selection */
.child-selection-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--carpool-gap);
  margin-top: var(--carpool-gap);
}

.child-selection-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md, 1rem);
  background: var(--carpool-surface-subtle);
  border: 1px solid var(--carpool-border);
  border-radius: var(--carpool-radius-sm);
  gap: var(--space-md, 1rem);
}

.child-selection-card__info {
  flex: 1;
}

.child-selection-card__info strong {
  display: block;
  margin-bottom: var(--space-xs, 0.5rem);
  color: var(--carpool-text);
}

.child-selection-card__status {
  display: flex;
  gap: var(--space-sm, 0.5rem);
  flex-wrap: wrap;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xs, 0.25rem) var(--space-sm, 0.75rem);
  border-radius: var(--radius-full, 9999px);
  font-size: var(--font-size-sm, 0.85rem);
  font-weight: var(--font-weight-semibold, 600);
  letter-spacing: 0.01em;
}

.badge--primary {
  background: var(--carpool-highlight);
  color: var(--color-selected-text, #ffffff);
}

.badge--secondary {
  background: var(--carpool-surface-muted);
  color: var(--carpool-text);
  border: 1px solid var(--carpool-border);
}

.badge--success {
  background: var(--carpool-success);
  color: var(--color-selected-text, #ffffff);
}

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

/* Info Boxes */
.info-box {
  padding: var(--space-md);
  border-radius: var(--carpool-radius-sm);
  margin-bottom: var(--carpool-gap);
  background: var(--carpool-surface-subtle);
  border: 1px solid var(--carpool-border);
}

.info-box--warning {
  background: var(--carpool-warning-soft);
  border: 1px solid var(--carpool-warning);
  color: var(--carpool-text);
}

.info-box ul {
  margin: var(--space-xs, 0.5rem) 0 0 var(--space-lg, 1.25rem);
  padding: 0;
  color: var(--carpool-text-muted);
}

.info-box li {
  margin: var(--space-xs, 0.25rem) 0;
  font-size: var(--font-size-sm, 0.9rem);
}

/* Empty States */
.empty-state {
  text-align: center;
  padding: var(--space-2xl, 3rem) var(--space-lg, 1.5rem);
  color: var(--carpool-text-muted);
  font-size: var(--font-size-lg, 1.05rem);
  background: var(--carpool-surface);
  border-radius: var(--carpool-radius);
  border: 1px dashed var(--carpool-border);
}

/* Alerts */
.alert {
  padding: var(--space-md);
  border-radius: var(--carpool-radius-sm);
  margin-bottom: var(--carpool-gap-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm, 0.75rem);
  background: var(--carpool-surface-subtle);
  border: 1px solid var(--carpool-border);
}

.alert--warning {
  background: var(--carpool-warning-soft);
  border: 1px solid var(--carpool-warning);
  color: var(--carpool-text);
}

.alert strong {
  font-weight: var(--font-weight-semibold, 600);
}

/* Forms */
.form-fieldset {
  border: 2px solid var(--carpool-border);
  border-radius: var(--carpool-radius-sm);
  padding: var(--space-md);
  margin-bottom: var(--carpool-gap);
  background: var(--carpool-surface);
  box-shadow: var(--shadow-sm, 0 1px 2px rgb(15 122 90 / 0.08));
}

.form-fieldset legend {
  font-weight: var(--font-weight-semibold, 600);
  color: var(--carpool-highlight);
  padding: 0 var(--space-xs, 0.5rem);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--carpool-gap);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 0.75rem);
}

.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 0.5rem);
  padding: var(--space-sm, 0.75rem);
  border: 2px solid var(--carpool-border);
  border-radius: var(--carpool-radius-sm);
  cursor: pointer;
  transition: background var(--transition-base, 250ms ease), border-color var(--transition-base, 250ms ease), color var(--transition-base, 250ms ease);
  min-height: var(--carpool-touch-target);
}

.radio-label:hover {
  background: var(--carpool-surface-subtle);
  border-color: var(--carpool-highlight);
}

.radio-label input[type='radio'] {
  margin: 0;
}

.radio-label input[type='radio']:checked + span {
  font-weight: var(--font-weight-semibold, 600);
  color: var(--carpool-highlight);
}

.form-help {
  display: block;
  margin-top: var(--space-xs, 0.25rem);
  font-size: var(--font-size-xs, 0.85rem);
  color: var(--carpool-text-muted);
}

.required {
  color: var(--color-error, #9a3f38);
}

/* Responsive Design */
@media (min-width: 640px) {
  .carpool-actions {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .activity-info-card__details {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }

  .form-row {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
}

@media (min-width: 1024px) {
  .carpool-section {
    margin-bottom: var(--space-3xl, 4rem);
  }
}


/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .activity-card,
  .capacity-indicator__fill,
  .radio-label,
  .button--large {
    transition: none;
  }
}

/* Print styles */
@media print {
  .carpool-actions,
  .activity-card__actions,
  .carpool-offer-card__actions,
  .assignment-card__ride button {
    display: none !important;
  }

  .activity-card,
  .carpool-offer-card,
  .assignment-card {
    break-inside: avoid;
    box-shadow: none;
    border-color: #ccc;
  }
}