/* ==============================
   Engine Explorer - filterable card view
   Filters: always-visible multi-select dropdowns, mobile-first
   ============================== */

.engine-explorer {
  margin-block: var(--space-lg);
}

/* ---- Filter Bar (always visible) ---- */
.engine-explorer__filter-bar {
  margin-bottom: var(--space-md);
}

.engine-explorer__filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
}

/* ---- Filter Dropdown ---- */
.filter-dropdown {
  position: relative;
}

.filter-dropdown__trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--surface-3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  min-height: 44px;
}

.filter-dropdown__trigger:hover {
  background: var(--surface-4);
  border-color: var(--border-default);
  color: var(--text-primary);
}

.filter-dropdown__trigger[aria-expanded="true"] {
  background: rgba(var(--color-primary-rgb), 0.12);
  border-color: rgba(var(--color-primary-rgb), 0.35);
  color: var(--color-primary);
}

.filter-dropdown__icon {
  flex-shrink: 0;
  color: inherit;
  opacity: 0.9;
}

.filter-dropdown__label {
  white-space: nowrap;
}

.filter-dropdown__chevron {
  flex-shrink: 0;
  transition: transform var(--duration-fast) var(--ease-out);
  opacity: 0.7;
}

.filter-dropdown__trigger[aria-expanded="true"] .filter-dropdown__chevron {
  transform: rotate(180deg);
}

.filter-dropdown__panel {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 20;
  min-width: 200px;
  max-width: 280px;
  max-height: 280px;
  overflow-y: auto;
  padding: var(--space-xs);
  background: var(--surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.filter-dropdown__options {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.filter-dropdown__option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
  user-select: none;
}

.filter-dropdown__option:hover {
  background: var(--surface-3);
  color: var(--text-primary);
}

.filter-dropdown__option input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  margin: 0;
  flex-shrink: 0;
  accent-color: var(--color-primary);
}

.filter-dropdown__option:has(input:checked) {
  background: rgba(var(--color-primary-rgb), 0.08);
  color: var(--color-primary);
  font-weight: 500;
}

.filter-dropdown__option--with-icon {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.filter-dropdown__option-icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: inherit;
  opacity: 0.9;
}

.filter-dropdown__option-icon--mask {
  display: inline-block;
  background-color: currentColor;
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

/* ---- Clear Filters ---- */
.engine-explorer__clear-filters {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-sm) var(--space-md);
  min-height: 44px;
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.engine-explorer__clear-filters:hover {
  background: rgba(var(--color-danger), 0.1);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

/* ---- Active Filter Pills ---- */
.engine-explorer__active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--space-sm);
}

.active-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  background: rgba(var(--color-primary-rgb), 0.1);
  border: 1px solid rgba(var(--color-primary-rgb), 0.25);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  color: var(--color-primary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.active-pill:hover {
  background: rgba(var(--color-danger), 0.12);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.active-pill__x {
  font-size: 0.8rem;
  line-height: 1;
}

/* ---- Results Bar ---- */
.engine-explorer__results-bar {
  margin-top: var(--space-md);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

/* ---- Card Grid ---- */
.engine-explorer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .engine-explorer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .engine-explorer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }
}

/* ---- Explorer Card ---- */
.ex-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-base) var(--ease-out);
}

.ex-card:hover {
  border-color: rgba(var(--color-primary-rgb), 0.25);
  box-shadow: var(--shadow-md);
}

.ex-card[hidden] {
  display: none;
}

/* -- Card Header -- */
.ex-card__header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.ex-card__logo {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.ex-card__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.ex-card__identity {
  flex: 1;
  min-width: 0;
}

.ex-card__name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin: 0;
  line-height: 1.2;
  color: var(--text-primary);
}

.ex-card__tagline {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-top: 2px;
}

.ex-card__ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  font-family: var(--font-mono);
  white-space: nowrap;
  flex-shrink: 0;
}

/* -- Description -- */
.ex-card__desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
  margin: 0;
}

/* -- Specs Grid -- */
.ex-card__specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xs) var(--space-md);
}

.ex-card__spec {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.ex-card__spec-label {
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
}

.ex-card__spec-value {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 5px;
}

/* -- Sections (platforms, best-for, games) -- */
.ex-card__section {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ex-card__section-label {
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
}

/* -- Platform Badges -- */
.ex-card__platform-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.plat-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 500;
}

.plat-badge--native {
  background: rgba(var(--color-success-rgb), 0.1);
  color: var(--color-success);
}

.plat-badge--middleware {
  background: rgba(var(--color-warning-rgb), 0.1);
  color: var(--color-warning);
}

.plat-badge--none {
  background: var(--surface-3);
  color: var(--text-tertiary);
  opacity: 0.5;
}

.plat-badge__svg {
  flex-shrink: 0;
}

.plat-badge__img {
  display: inline-block;
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  background-color: currentColor;
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

/* -- Tags -- */
.ex-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.tag--sm {
  font-size: 0.65rem;
  padding: 2px 8px;
}

/* -- Notable Games -- */
.ex-card__games {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  font-style: italic;
}

/* -- CTA -- */
.ex-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: auto;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border-subtle);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  transition: gap var(--duration-fast) var(--ease-out);
}

.ex-card__cta:hover {
  gap: var(--space-xs);
}

/* ---- Empty State ---- */
.engine-explorer__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-3xl) var(--space-xl);
  text-align: center;
  color: var(--text-tertiary);
}

.engine-explorer__empty p {
  font-size: var(--font-size-lg);
  margin: 0;
}

/* ---- Responsive: mobile ---- */
@media (max-width: 639px) {
  .engine-explorer__filter-row {
    gap: var(--space-sm);
  }

  .filter-dropdown__trigger {
    flex: 1 1 auto;
    min-width: 0;
  }

  .filter-dropdown__panel {
    max-width: calc(100vw - var(--space-lg));
    left: 0;
    right: auto;
  }

  .ex-card {
    padding: var(--space-md);
  }

  .ex-card__specs {
    grid-template-columns: 1fr;
  }

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

/* ---- Responsive: desktop ---- */
@media (min-width: 640px) {
  .engine-explorer__filter-bar {
    margin-bottom: var(--space-lg);
  }

  .filter-dropdown__panel {
    min-width: 220px;
  }
}