/* ==========================================================================
   Components — BEM Blocks for all page sections
   ========================================================================== */

/* ---------- Hero Section ---------- */

.hero {
  padding: var(--space-section) 0;
  text-align: center;
}

.hero__heading {
  max-width: 50rem;
  margin-inline: auto;
  margin-bottom: var(--space-lg);
}

.hero__text {
  max-width: 48rem;
  margin-inline: auto;
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
}

/* ---------- Card Grid ---------- */

.card-grid {
  padding: var(--space-2xl) 0 var(--space-section);
}

.card-grid__list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-xl);
}

.feature-card {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.feature-card:hover {
  border-color: var(--color-accent-blue);
  box-shadow: var(--shadow-card);
}

.feature-card__link {
  display: block;
}

.feature-card__image {
  width: 6rem;
  height: 6rem;
  margin-inline: auto;
  margin-bottom: var(--space-md);
  object-fit: contain;
}

.feature-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

/* ---------- Content Section (inner pages) ---------- */

.content-section {
  padding: var(--space-section) 0;
}


.content-section--centered {
  text-align: center;
}

.content-section__heading {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-lg);
}

.content-section__text {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
  max-width: 52rem;
}

.content-section--bg .content-section__text {
  color: var(--color-text-light);
}

.content-section--bg .video-grid__intro {
  color: var(--color-text-light);
}

.content-section--centered .content-section__text {
  margin-inline: auto;
}

.content-section__highlight {
  color: var(--color-accent-green);
  font-weight: var(--font-weight-medium);
}

.content-section__trademark {
  font-style: italic;
}

.content-section__quote {
  border-left: 3px solid var(--color-accent-blue);
  padding-left: var(--space-lg);
  margin: var(--space-xl) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

/* ---------- Video Grid ---------- */

.video-grid {
  padding: var(--space-section) 0;
}

.video-grid__intro {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 52rem;
  margin-bottom: var(--space-2xl);
}

.video-grid__list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl);
}

.video-card {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  overflow: hidden;
}

.video-card__embed {
  aspect-ratio: 16 / 9;
  width: 100%;
  background-color: #000;
}

.video-card__embed iframe,
.video-card__embed video {
  width: 100%;
  height: 100%;
}

.video-card__body {
  padding: var(--space-lg);
}

.video-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-sm);
}

.video-card__description {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
}

/* ---------- Patent List ---------- */

.patent-list {
  padding: var(--space-section) 0;
}

.patent-card {
  padding: var(--space-2xl);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--space-xl);
}

.patent-card:last-child {
  margin-bottom: 0;
}

.patent-card__number {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent-blue);
  margin-bottom: var(--space-xs);
}

.patent-card__date {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.patent-card__abstract {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
}

/* ---------- Content Section Icon (whatwedo, whoarewe page icons) ---------- */

.content-section__icon {
  display: block;
  width: 6rem;
  height: auto;
  margin-bottom: var(--space-lg);
}

.content-section--bg {
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.content-section--bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-color: rgba(10, 25, 30, 0.82);
  z-index: 0;
}

.content-section--bg .page-container {
  position: relative;
  z-index: 1;
}

.content-section__photo {
  width: 100%;
  max-width: 36rem;
  height: auto;
  border-radius: var(--border-radius-md);
  margin-top: var(--space-xl);
}

.content-section__link-cta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* ---------- Patent Card Diagram ---------- */

.patent-card__diagram {
  width: 100%;
  max-width: 12rem;
  height: auto;
  margin-bottom: var(--space-lg);
  border-radius: var(--border-radius-sm);
}

/* ---------- Safety List ---------- */

.safety-list {
  padding: var(--space-2xl) 0;
}

.safety-list__item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.safety-list__item:first-child {
  padding-top: 0;
}

.safety-list__item:last-child {
  border-bottom: none;
}

.safety-list__icon {
  width: 3.75rem;
  flex-shrink: 0;
  margin-top: 0.2rem;
  filter: brightness(0) invert(1);
}

.safety-list__heading {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
}

.safety-list__text {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
}

/* ---------- Section Icon Row (environment heading) ---------- */

.section-icon-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.section-icon-row .content-section__heading {
  margin-bottom: 0;
}

.section-icon-row__icon {
  width: 4.875rem;
  flex-shrink: 0;
  filter: brightness(0) invert(1);
}

/* ---------- Content Image Row ---------- */

.content-image-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.content-image-row__img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-md);
  object-fit: cover;
}

/* ---------- Patent Card Accordion ---------- */

.patent-card__accordion {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-lg);
}

.patent-card__accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-lg) 0;
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  list-style: none;
}

.patent-card__accordion-trigger::-webkit-details-marker {
  display: none;
}

.patent-card__accordion-trigger::after {
  content: '+';
  font-size: var(--font-size-lg);
  color: var(--color-accent-blue);
  flex-shrink: 0;
}

.patent-card__accordion[open] .patent-card__accordion-trigger::after {
  content: '−';
}

.patent-card__accordion-body {
  padding-bottom: var(--space-lg);
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
}

/* ---------- Summary Card ---------- */

.summary-card {
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  margin-top: var(--space-xl);
}

.summary-card__heading {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-accent-blue);
  margin-bottom: var(--space-md);
}

.summary-card__list {
  list-style: none;
  padding: 0;
}

.summary-card__list li {
  padding: var(--space-sm) 0;
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
  border-bottom: 1px solid var(--color-border);
}

.summary-card__list li:last-child {
  border-bottom: none;
}

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

@media (max-width: 48em) {
  .card-grid__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .video-grid__list {
    grid-template-columns: 1fr;
  }

  .patent-card {
    padding: var(--space-lg);
  }

  .content-image-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 30em) {
  .card-grid__list {
    grid-template-columns: 1fr;
  }
}