:root {
  --product-shell: min(1120px, calc(100vw - 48px));
}

.product-shell { width: var(--product-shell); margin-inline: auto; }

.product-page {
  min-height: 100vh;
  padding: 72px 0 100px;
  background:
    radial-gradient(circle at 88% 8%, rgba(24, 93, 165, 0.09), transparent 28%),
    linear-gradient(180deg, #f8fafc 0%, #eef4f8 100%);
}

.product-format-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
  grid-template-areas:
    "identity video"
    "intro gallery"
    "interface interface";
  gap: 24px;
  align-items: stretch;
}

.product-block {
  overflow: hidden;
  border: 1px solid rgba(209, 220, 231, 0.92);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 18px 46px rgba(12, 24, 48, 0.07);
}

.product-identity {
  grid-area: identity;
  display: flex;
  min-height: 330px;
  padding: 42px;
  flex-direction: column;
  justify-content: space-between;
  color: #fff;
  background: linear-gradient(145deg, #092f59, #1767a8);
}

.product-back {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 8px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  font-weight: 700;
}

.product-back:hover { color: #fff; }

.product-category {
  margin: 0 0 10px;
  color: #81d4aa;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.product-identity h1 {
  margin: 0;
  font-size: clamp(44px, 5vw, 72px);
  line-height: 1;
  letter-spacing: -0.045em;
}

.product-tagline {
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.35;
}

.product-video { grid-area: video; min-height: 330px; }
.product-intro { grid-area: intro; min-height: 360px; padding: 34px 36px; }
.product-gallery { grid-area: gallery; height: 460px; }
.product-interface { grid-area: interface; min-height: 440px; }

.product-block__heading {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 28px 18px;
}

.product-block__heading span {
  color: var(--blue);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.product-block__heading h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
}

.product-video__media,
.product-gallery__media,
.product-interface__media {
  position: relative;
  overflow: hidden;
  background: #dfe8ef;
}

.product-video__media { aspect-ratio: 16 / 9; margin: 0 28px 28px; border-radius: 14px; }
.product-gallery__media { height: 384px; }
.product-interface__media { height: 355px; min-height: 355px; }

.product-video video,
.product-gallery img,
.product-interface img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-gallery--contain img,
.product-interface--contain img {
  padding: 28px;
  object-fit: contain;
  background: #fff;
}

.product-intro p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.product-intro__points {
  display: grid;
  gap: 0;
  margin-top: 28px;
  border-top: 2px solid var(--blue);
}

.product-intro__points span {
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.product-media-placeholder {
  display: grid;
  height: 100%;
  min-height: inherit;
  padding: 28px;
  place-content: center;
  text-align: center;
  color: var(--muted);
  background:
    linear-gradient(135deg, rgba(255,255,255,0.92), rgba(236,243,248,0.95)),
    repeating-linear-gradient(45deg, transparent 0 16px, rgba(24,93,165,0.05) 16px 17px);
}

.product-media-placeholder strong {
  display: block;
  margin-bottom: 7px;
  color: var(--ink);
  font-size: 19px;
}

.product-media-placeholder span { font-size: 14px; }
.product-media-placeholder a { margin-top: 12px; color: var(--blue); font-weight: 750; }

.product-page-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: 24px;
  padding: 28px 34px;
  border-radius: 18px;
  color: #fff;
  background: #071f3b;
}

.product-page-cta h2 { margin: 0 0 4px; font-size: 24px; }
.product-page-cta p { margin: 0; color: rgba(255,255,255,0.7); }
.product-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 23px;
  border-radius: 999px;
  color: #fff;
  background: var(--blue);
  font-weight: 750;
  white-space: nowrap;
}
.product-button:hover { background: var(--blue-deep); }

.product-footer { padding: 32px 0; color: rgba(255,255,255,0.68); background: #071426; font-size: 13px; }
.product-footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

@media (max-width: 900px) {
  .product-format-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "identity"
      "video"
      "intro"
      "gallery"
      "interface";
  }
  .product-identity { min-height: 280px; }
  .product-video,
  .product-intro { min-height: 0; }
  .product-gallery { height: auto; }
  .product-gallery__media { height: 390px; }
}

@media (max-width: 680px) {
  :root { --product-shell: calc(100vw - 28px); }
  .product-page { padding: 28px 0 64px; }
  .product-format-grid { gap: 14px; }
  .product-block { border-radius: 15px; }
  .product-identity { min-height: 255px; padding: 28px; }
  .product-intro { padding: 26px; }
  .product-block__heading { padding: 21px 22px 15px; }
  .product-video__media { margin: 0 18px 18px; }
  .product-gallery__media { height: 300px; min-height: 0; }
  .product-interface { min-height: 360px; }
  .product-interface__media { height: 285px; min-height: 285px; }
  .product-page-cta { align-items: flex-start; flex-direction: column; padding: 26px; }
  .product-footer__inner { align-items: flex-start; flex-direction: column; }
}