:root {
  color-scheme: dark;
}

body.product-page {
  background: radial-gradient(circle at top, rgba(59, 130, 246, 0.08), transparent 45%), #07090f;
  color: #f8fafc;
}

.product-page .top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem clamp(1.5rem, 3vw, 3.5rem);
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
  position: sticky;
  top: 0;
  backdrop-filter: blur(16px);
  background: rgba(7, 9, 15, 0.85);
  z-index: 10;
}

.product-page .nav-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.product-page .nav-brand img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.product-page .nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.product-page main {
  padding: 2.5rem clamp(1.5rem, 3vw, 4rem) 5rem;
  display: grid;
  gap: 3rem;
}

.product-hero {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
}

.product-hero h1 {
  font-size: clamp(2.4rem, 3.2vw, 3.4rem);
  margin-bottom: 0.75rem;
}

.product-hero .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.product-hero .tag {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.product-hero .hero-image {
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 24px;
  padding: 1.5rem;
  display: grid;
  place-items: center;
  min-height: 260px;
}

.product-hero .hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
}

.panel-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.panel-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 20px;
  padding: 1.5rem;
  display: grid;
  gap: 0.75rem;
}

.panel-card h3 {
  margin: 0;
}

.panel-card ul {
  margin: 0;
  padding-left: 1.2rem;
}

.section-block {
  display: grid;
  gap: 1.5rem;
}

.section-block h2 {
  font-size: 1.8rem;
  margin: 0;
}

.section-block p {
  color: rgba(226, 232, 240, 0.85);
  line-height: 1.7;
}

.visual-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.visual-card {
  margin: 0;
  overflow: hidden;
}

.visual-card img {
  width: 100%;
  border-radius: 12px;
  display: block;
}

.access-form {
  display: grid;
  gap: 1rem;
}

.access-form label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.9rem;
}

.access-form input,
.access-form textarea,
.access-form select {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
  color: inherit;
}

.access-form textarea {
  min-height: 140px;
  resize: vertical;
}

.access-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}

.footer-note {
  color: rgba(148, 163, 184, 0.7);
  font-size: 0.85rem;
}

.theme-toggle {
  position: relative;
  width: 54px;
  height: 30px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.8);
  cursor: pointer;
  padding: 0;
}

.theme-toggle__thumb {
  position: absolute;
  top: 3px;
  left: 4px;
  width: 22px;
  height: 22px;
  background: #f8fafc;
  border-radius: 999px;
  transition: transform 0.3s ease;
}

body.theme-light {
  background: #f8fafc;
  color: #0f172a;
}

body.theme-light .product-page .top-nav {
  background: rgba(248, 250, 252, 0.9);
}

body.theme-light .panel-card,
body.theme-light .product-hero .hero-image {
  background: rgba(241, 245, 249, 0.9);
}

body.theme-light .access-form input,
body.theme-light .access-form textarea,
body.theme-light .access-form select {
  background: rgba(226, 232, 240, 0.9);
}

body.theme-light .theme-toggle__thumb {
  transform: translateX(22px);
}