.bt-hero .container {
  display: grid;
  gap: var(--space-6);
}
.bt-gallery {
  position: relative;
}
.bt-carousel {
  display: grid;
  overflow: hidden;
  border-radius: var(--ds-radius-16);
}
.bt-slide {
  grid-area: 1 / 1;
  width: 100%;
  height: auto;
  opacity: 0;
  filter: blur(2px);
  transform: scale(1);
  transition: opacity 400ms var(--ds-ease-out), filter 400ms var(--ds-ease-out),
    transform 5000ms linear;
}
.bt-slide.is-active {
  opacity: 1;
  filter: blur(0);
  transform: scale(1.045);
}
.bt-carousel-toggle {
  position: absolute;
  right: var(--space-3);
  bottom: var(--space-3);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--ds-background-100);
  color: var(--brand-blue);
  cursor: pointer;
}
.bt-carousel-toggle[hidden] {
  display: none;
}
.bt-carousel-toggle .bt-icon-play,
.bt-carousel-toggle[aria-pressed="true"] .bt-icon-pause {
  display: none;
}
.bt-carousel-toggle[aria-pressed="true"] .bt-icon-play {
  display: block;
}
.bt-copy h1 {
  color: var(--ink-primary);
}
.bt-intro {
  margin-top: var(--space-4);
  max-width: 52ch;
}
.bt-ticks {
  list-style: none;
  margin: var(--space-5) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.bt-ticks li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--ds-gray-900);
}
.bt-ticks svg {
  flex: none;
  margin-top: 4px;
  color: var(--ds-accent-600);
}
.bt-included-card {
  margin-top: var(--space-6);
  background: var(--surface-panel);
  border-radius: var(--ds-radius-16);
  padding: var(--space-6);
  display: grid;
  justify-items: start;
  gap: var(--space-4);
}
.bt-badge {
  margin: 0;
  padding: 4px 14px;
  border-radius: 999px;
  background: var(--ds-background-100);
  border: 1px solid var(--border-strong);
  font-family: var(--ds-font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-primary);
}
.bt-included-line {
  color: var(--ink-primary);
  font-weight: 500;
  max-width: 44ch;
}

.bt-measure-head {
  max-width: 62ch;
}
.bt-measure-head .body-copy {
  margin-top: var(--space-4);
}
.bt-measure-grid {
  margin-top: var(--space-7);
  display: grid;
  gap: var(--space-6);
}
.bt-measure-group h3 {
  color: var(--ink-primary);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-strong);
}
.bt-marker-list {
  display: grid;
}
.bt-marker {
  border-bottom: 1px solid var(--border-subtle);
}
.bt-marker-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  cursor: pointer;
  list-style: none;
}
.bt-marker-summary::-webkit-details-marker {
  display: none;
}
.bt-marker-name {
  margin: 0;}
.bt-marker .faq-item-chevron {
  flex: none;
  color: var(--ds-gray-600);
  transition: transform var(--ds-duration-base) var(--ds-ease);
}
.bt-marker[open] .faq-item-chevron {
  transform: rotate(180deg);
}
.bt-marker-body {
  margin: 0;
  padding: 0 0 var(--space-4);
  color: var(--ink-secondary);
  max-width: 52ch;
}

.bt-programmes {
}
.bt-programmes-head {
  max-width: 62ch;
}
.bt-programmes-head .body-copy {
  margin-top: var(--space-3);
}
.bt-programmes-panel {
  margin-top: var(--space-6);
  background: var(--surface-page);
  border: 1px solid var(--border-subtle);
  border-radius: var(--ds-radius-16);
  padding: var(--space-6);
}
.bt-panel-price {
  margin: 0;
  font-family: var(--ds-font-mono);
  font-weight: 500;
  font-size: clamp(24px, 4vw, 32px);
  color: var(--brand-blue);
}
.bt-panel-basis {
  margin: var(--space-2) 0 0;
  color: var(--ink-secondary);
}
.bt-panel-actions {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.bt-tech .container {
  display: grid;
  gap: var(--space-6);
}
.bt-tech-copy .body-copy {
  margin-top: var(--space-4);
  max-width: 52ch;
}
.bt-video-facade {
  display: grid;
  justify-items: center;
  align-content: center;
  gap: var(--space-4);
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: var(--ds-radius-16);
  background: var(--surface-dark);
  color: var(--ink-on-dark);
  cursor: pointer;
  padding: var(--space-5);
}
.bt-video-play {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 999px;
  background: var(--ds-background-100);
  color: var(--brand-blue);
  transition: background var(--ds-duration-fast) var(--ds-ease);
}
@media (hover: hover) {
  .bt-video-facade:hover .bt-video-play {
    background: var(--ds-gray-200);
  }
}
.bt-video-label {
  display: grid;
  gap: 4px;
  font-weight: 500;
}
.bt-video-note {
  color: var(--ds-gray-300);
  font-weight: 400;
}
.bt-video iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: var(--ds-radius-16);
}

@media (min-width: 900px) {
  .bt-hero .container {
    grid-template-columns: 1.1fr 1fr;
    gap: var(--space-8);
    align-items: start;
  }
  .bt-measure-grid {
    grid-template-columns: 1fr 1fr;
    column-gap: var(--space-8);
  }
  .bt-tech .container {
    grid-template-columns: 1fr 1.1fr;
    gap: var(--space-8);
    align-items: center;
  }
  .bt-panel-actions {
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bt-marker .faq-item-chevron {
    transition: none;
  }
  .bt-slide {
    transition: none;
    filter: none;
  }
  .bt-slide.is-active {
    animation: none;
  }
}

[data-reveal-armed] [data-reveal] > svg path {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 200ms var(--ds-ease-out);
  transition-delay: calc(var(--reveal-delay, 0ms) + 120ms);
}

[data-reveal-armed] [data-reveal].is-revealed > svg path {
  stroke-dashoffset: 0;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal-armed] [data-reveal] > svg path {
    stroke-dashoffset: 0;
    transition: none;
  }
}

.bt-tablist {
  display: flex;
  gap: var(--space-1);
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--border-subtle);
  margin: var(--space-6) 0 var(--space-4);
}

@media (min-width: 768px) {
  .bt-tab {
    flex: 1;
    text-align: center;
  }
}

.bt-tab {
  flex: none;
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  border: none;
  border-bottom: 2px solid transparent;
  background: none;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--ds-gray-900);
  cursor: pointer;
  white-space: nowrap;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: color var(--ds-duration-fast) var(--ds-ease),
    border-color var(--ds-duration-fast) var(--ds-ease);
}

.bt-tab[aria-selected="true"] {
  color: var(--ink-primary);
  border-bottom-color: var(--brand-blue);
}

@media (hover: hover) {
  .bt-tab:hover {
    color: var(--ink-primary);
  }
}

.bt-measure-grid.is-tabbed {
  display: block;
  margin-top: 0;
}

@media (min-width: 1024px) {
  .bt-measure-split {
    display: grid;
    grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
    grid-template-rows: auto 1fr;
    grid-template-areas:
      "head tabs"
      "head panel";
    column-gap: var(--space-8);
    align-items: start;
  }

  .bt-measure-split .bt-measure-head {
    grid-area: head;
  }

  .bt-measure-split .bt-tablist {
    grid-area: tabs;
    margin-top: 0;
  }

  .bt-measure-split .bt-measure-grid.is-tabbed {
    grid-area: panel;
  }
}

.bt-measure-grid.is-measuring .bt-marker::details-content {
  transition: none;
}

.bt-programmes {
  background: transparent;
  padding: var(--panel-gutter);
}

.bt-programmes > .container {
  background: var(--surface-panel);
  border-radius: var(--ds-radius-16);
  padding: var(--space-7) var(--panel-inset);
  max-width: none;
}

@media (min-width: 768px) {
  .bt-programmes > .container {
    padding-block: var(--space-8);
  }
}

.bt-marker[open] .bt-marker-body {
  animation: bt-body-in 260ms var(--ds-ease-out);
}

@keyframes bt-body-in {
  from {
    opacity: 0;
    translate: 0 -4px;
  }
}

@supports (interpolate-size: allow-keywords) {
  details.bt-marker {
    interpolate-size: allow-keywords;
  }

  .bt-marker::details-content {
    height: 0;
    overflow: clip;
    transition: height 280ms var(--ds-ease-out),
      content-visibility 280ms allow-discrete;
  }

  .bt-marker[open]::details-content {
    height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bt-marker[open] .bt-marker-body {
    animation: none;
  }

  .bt-marker::details-content {
    transition: none;
  }
}