.main-nav a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.products-toggle.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.product-hero {
  padding: 2rem 0 1.2rem;
}

.product-banner {
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  min-height: 220px;
}

.product-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(9, 17, 33, 0.75), rgba(9, 17, 33, 0.2));
}

.product-banner-content {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  align-content: center;
  color: #edf2ff;
  padding: 1.6rem;
}

.breadcrumb {
  font-size: 0.82rem;
  color: #d0defb;
}

.product-banner-content h1 {
  margin: 0.45rem 0 0;
  line-height: 1.2;
  font-size: clamp(1.6rem, 2.6vw, 2.25rem);
}

.product-shell {
  padding: 0.7rem 0 2.7rem;
}

.product-main {
  display: grid;
  grid-template-columns: 390px 1fr;
  gap: 1rem;
}

.media-card,
.info-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-alt) 100%);
}

.media-main {
  aspect-ratio: 1 / 1;
  background: var(--surface);
}

.media-main img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #ffffff;
  padding: 0.65rem;
}

.media-meta {
  border-top: 1px solid var(--line);
  padding: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.meta-chip {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.76rem;
  padding: 0.25rem 0.55rem;
}

.info-card {
  padding: 0.95rem;
}

.category-line {
  color: var(--muted);
  font-size: 0.88rem;
}

.category-line a {
  color: var(--accent);
}

.info-card h2 {
  margin: 0.35rem 0 0.35rem;
  font-size: clamp(1.35rem, 2.2vw, 2rem);
  line-height: 1.2;
}

.stars {
  color: #f59e0b;
  font-size: 0.88rem;
  margin-bottom: 0.6rem;
}

.info-card p {
  margin: 0;
  color: var(--muted);
}

.cta-row {
  margin-top: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cta-btn {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.82rem;
  padding: 0.48rem 0.68rem;
}

.cta-btn.primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.highlight-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
}

.hl-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-alt) 100%);
  box-shadow: var(--shadow);
  padding: 0.75rem;
}

.hl-card .k {
  font-size: 0.78rem;
  color: var(--muted);
}

.hl-card .v {
  margin-top: 0.15rem;
  font-weight: 700;
  color: var(--text);
}

.detail-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-alt) 100%);
  box-shadow: var(--shadow);
  padding: 0.95rem;
}

.panel h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.panel p {
  margin: 0;
  color: var(--muted);
}

.spec-list {
  display: grid;
  gap: 0.42rem;
}

.spec-item {
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 0.52rem 0.58rem;
}

.spec-item .k {
  color: var(--muted);
  font-size: 0.78rem;
}

.spec-item .v {
  font-size: 0.9rem;
  color: var(--text);
}

.related {
  margin-top: 1rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.rel-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-alt) 100%);
  transition: 0.24s ease;
}

.rel-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glow);
  border-color: rgba(72, 130, 255, 0.45);
}

.rel-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: #ffffff;
  padding: 0.45rem;
}

.rel-card .body {
  padding: 0.68rem;
}

.rel-card h4 {
  margin: 0 0 0.28rem;
  font-size: 0.95rem;
  line-height: 1.3;
}

.rel-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 1080px) {
  .product-main {
    grid-template-columns: 1fr;
  }

  .highlight-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .detail-grid {
    grid-template-columns: 1fr;
  }

  .related-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 700px) {
  .highlight-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }
}