.product-usecases-block {
  --uc-card: rgba(255, 255, 255, .62);
  --uc-border: rgba(24, 34, 45, .12);
  --uc-line: rgba(24, 34, 45, .28);
  --uc-title: #171717;
  --uc-text: rgba(35, 39, 44, .70);
  --uc-num-bg: #2563eb;
  --uc-num-fg: #ffffff;
  --uc-link: #2563eb;
}

.product-usecases-block__head {
  margin: 0 auto clamp(28px, 4vw, 46px);
  max-width: 760px;
  text-align: center;
}

.product-usecases-block__title {
  margin: 0;
  font-size: clamp(24px, 2.2vw, 32px);
  line-height: 1.2;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--uc-title);
}

.product-usecases-block__subtitle {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.55;
  color: var(--uc-text);
}

/* ── HUB ─────────────────────────────────────────────── */
.product-usecases-block__hub {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.product-usecases-block__center {
  position: relative;
  z-index: 2;
  width: 132px;
  height: 132px;
  padding: 20px;
  border-radius: 50%;
  border: 1px solid var(--uc-border);
  background: var(--uc-card);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, .55);
}

.product-usecases-block__center img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* связи: вертикаль от прибора → шина → отводы к карточкам (grid как у карточек) */
.product-usecases-block__connector {
  position: relative;
  width: 100%;
  height: 48px;
  margin: 2px 0 0;
}

.uc-conn__stem {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 25px;
  background: var(--uc-line);
}

.uc-conn__bus {
  position: absolute;
  top: 23px;
  height: 2px;
  background: var(--uc-line);
  left: calc((100% - (var(--uc-count, 4) - 1) * 18px) / var(--uc-count, 4) / 2);
  right: calc((100% - (var(--uc-count, 4) - 1) * 18px) / var(--uc-count, 4) / 2);
}

.uc-conn__drops {
  position: absolute;
  top: 24px;
  left: 0;
  right: 0;
  height: 24px;
  display: grid;
  grid-template-columns: repeat(var(--uc-count, 4), minmax(0, 1fr));
  gap: 18px;
}

.uc-conn__drop {
  width: 2px;
  height: 24px;
  margin: 0 auto;
  background: var(--uc-line);
}

.product-usecases-block__cards {
  position: relative;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(var(--uc-count, 4), minmax(0, 1fr));
  gap: 18px;
}

/* ── CARD ────────────────────────────────────────────── */
.product-usecases-block__card {
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--uc-border);
  border-radius: 10px;
  background: var(--uc-card);
}

.product-usecases-block__num {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--uc-num-bg);
  color: var(--uc-num-fg);
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.product-usecases-block__media {
  aspect-ratio: 4 / 3;
  background: rgba(0, 0, 0, .04);
  overflow: hidden;
}

.product-usecases-block__media img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* тема-адаптивная иллюстрация: светлая по умолчанию, тёмная — в тёмной теме */
.product-usecases-block__media .uc-img_dark {
  display: none;
}
body.onde-theme-dark .product-usecases-block__media .uc-img_light,
html[data-onde-theme="dark"] body .product-usecases-block__media .uc-img_light {
  display: none;
}
body.onde-theme-dark .product-usecases-block__media .uc-img_dark,
html[data-onde-theme="dark"] body .product-usecases-block__media .uc-img_dark {
  display: block;
}

.product-usecases-block__media_icon {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
}

.product-usecases-block__media_icon img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.product-usecases-block__card-body {
  padding: 18px;
}

.product-usecases-block__card-title {
  margin: 0;
  font-size: 17px;
  line-height: 1.25;
  color: var(--uc-title);
}

.product-usecases-block__card-text {
  margin: 9px 0 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--uc-text);
}

.product-usecases-block__card-link {
  display: inline-flex;
  align-items: center;
  margin-top: 14px;
  color: var(--uc-link);
  font-weight: 700;
  text-decoration: none;
}

.product-usecases-block__card-link::after {
  content: "→";
  margin-left: 8px;
}

/* ── DARK THEME ──────────────────────────────────────── */
body.onde-theme-dark .product-usecases-block,
html[data-onde-theme="dark"] body .product-usecases-block {
  --uc-card: rgba(12, 14, 16, .68);
  --uc-border: rgba(255, 255, 255, .12);
  --uc-line: rgba(245, 241, 232, .32);
  --uc-title: #f5f1e8;
  --uc-text: rgba(245, 241, 232, .70);
  --uc-num-bg: #ffbf00;
  --uc-num-fg: #1a1407;
  --uc-link: #ffbf00;
}

body.onde-theme-dark .product-usecases-block__media,
html[data-onde-theme="dark"] body .product-usecases-block__media {
  background: rgba(255, 255, 255, .04);
}

/* ── RESPONSIVE ──────────────────────────────────────── */
@media (max-width: 991px) {
  .product-usecases-block__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .product-usecases-block__connector {
    display: none;
  }
}

@media (max-width: 575px) {
  .product-usecases-block__cards {
    grid-template-columns: 1fr;
  }
}