:root {
  color-scheme: light;
  --ink: #162029;
  --muted: #5e6974;
  --line: #d7dee5;
  --paper: #f6f8fb;
  --panel: #ffffff;
  --blue: #1464d2;
  --green: #197b58;
  --steel: #67798c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 32px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  font-weight: 800;
  color: var(--blue);
}

nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.product-shell {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1fr);
  gap: 42px;
  align-items: center;
  width: min(1120px, calc(100vw - 40px));
  margin: 52px auto 32px;
  min-height: 560px;
}

.product-media {
  position: relative;
  min-height: 420px;
  border: 1px solid var(--line);
  background:
    linear-gradient(145deg, #eef4fa 0%, #ffffff 54%, #e4ecef 100%);
  overflow: hidden;
}

.pipe,
.ring {
  position: absolute;
  border: 1px solid rgba(22, 32, 41, 0.14);
  box-shadow: 0 18px 42px rgba(20, 42, 67, 0.16);
}

.pipe {
  width: 250px;
  height: 92px;
  border-radius: 48px;
  background:
    linear-gradient(90deg, #f9fbff 0%, #ccd8e3 42%, #ffffff 60%, #aebdca 100%);
}

.pipe-a {
  left: 74px;
  top: 132px;
  transform: rotate(-22deg);
}

.pipe-b {
  right: 46px;
  bottom: 108px;
  transform: rotate(32deg);
}

.ring {
  width: 190px;
  height: 190px;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, transparent 0 42%, #e6edf4 43% 59%, #f9fbff 60% 72%, #a9bbc9 73%);
}

.ring-a {
  left: 92px;
  bottom: 66px;
}

.ring-b {
  right: 58px;
  top: 72px;
  transform: scale(0.72);
}

.product-info {
  padding-right: 4vw;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(42px, 6vw, 78px);
  line-height: 0.96;
  letter-spacing: 0;
}

.summary {
  margin: 24px 0;
  max-width: 560px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

button,
.secondary {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

.primary {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.secondary {
  display: inline-flex;
  align-items: center;
  background: #fff;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  width: min(1120px, calc(100vw - 40px));
  margin: 0 auto 72px;
  border: 1px solid var(--line);
  background: var(--line);
}

.spec-grid article {
  min-height: 120px;
  padding: 24px;
  background: var(--panel);
}

.spec-grid span {
  display: block;
  margin-bottom: 12px;
  color: var(--steel);
  font-size: 13px;
  font-weight: 750;
}

.spec-grid strong {
  font-size: 18px;
  line-height: 1.45;
}

@media (max-width: 760px) {
  .site-header {
    padding: 0 18px;
  }

  nav {
    gap: 14px;
    font-size: 13px;
  }

  .product-shell {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 28px;
    min-height: auto;
  }

  .product-media {
    min-height: 300px;
  }

  .product-info {
    padding-right: 0;
  }

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