:root {
  --ink: #1c242b;
  --navy: #183243;
  --navy-deep: #0b1f2e;
  --steel: #315f7a;
  --muted: #6b747b;
  --line: #dfe4e6;
  --soft-line: #eef1f2;
  --white: #ffffff;
  --paper: #f4f5f3;
  --gold: #c7a254;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.wrap { width: min(calc(100% - 32px), 1180px); margin-inline: auto; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.96); backdrop-filter: blur(14px) saturate(150%); border-bottom: 1px solid rgba(223,228,230,.9); }
.site-header > .wrap { position: relative; }
.header-logo { height: 3.6rem; display: flex; align-items: center; }
.logo { min-width: 8.3rem; display: flex; align-items: center; }
.logo img { width: auto; height: 40px; object-fit: contain; }
.main-nav { height: 2.75rem; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--soft-line); }
.main-nav a { position: relative; display: flex; align-items: center; justify-content: center; color: var(--navy); font-size: .74rem; font-weight: 650; white-space: nowrap; }
.main-nav a + a { border-left: 1px solid var(--soft-line); }
.main-nav a.active { color: var(--steel); }
.main-nav a.active::after { content: ""; position: absolute; right: 28%; bottom: 0; left: 28%; height: 2px; background: var(--gold); }
.header-search { position: absolute; top: .55rem; right: 0; width: 2.5rem; height: 2.5rem; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--navy); background: var(--white); }
.header-search svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }

.breadcrumb { min-height: 52px; display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 11px; }
.breadcrumb a:hover { color: var(--steel); }
.breadcrumb span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.product-main { border-top: 1px solid var(--soft-line); }
.product-overview { display: grid; gap: 28px; padding: 30px 0 42px; }
.product-media { width: 100%; aspect-ratio: 1 / 1; display: grid; place-items: center; overflow: hidden; border: 1px solid var(--line); background: var(--paper); }
.product-media img { width: 100%; height: 100%; padding: 12px; object-fit: contain; }
.image-placeholder { width: 100%; height: 100%; display: grid; place-items: center; color: #9aa5aa; font-size: 20px; font-weight: 800; }
.product-summary { min-width: 0; }
.product-type { margin: 0 0 7px; color: var(--steel); font-size: 11px; font-weight: 750; text-transform: uppercase; }
h1 { margin: 0; color: var(--navy); font-size: 32px; line-height: 1.16; letter-spacing: 0; }
.product-description { max-width: 660px; min-height: 22px; margin: 11px 0 0; color: var(--muted); font-size: 13px; }
.identity { margin: 24px 0 0; border-top: 1px solid var(--line); }
.identity-row { min-height: 46px; display: grid; grid-template-columns: 168px minmax(0, 1fr); gap: 16px; align-items: center; border-bottom: 1px solid var(--line); }
.identity-row dt { color: var(--muted); font-size: 11px; font-weight: 650; }
.identity-row dd { margin: 0; min-height: 18px; color: var(--ink); font-size: 13px; font-weight: 750; overflow-wrap: anywhere; }
.identity-row.pw-row dt, .identity-row.pw-row dd { color: #8b969b; font-size: 10px; font-weight: 600; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.button { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; padding: 0 16px; border-radius: 4px; font-size: 12px; font-weight: 750; }
.button-primary { color: var(--white); background: var(--steel); }
.button-primary:hover { background: var(--navy); }
.button-secondary { border: 1px solid #bdc8cd; color: var(--navy); background: var(--white); }
.button-secondary:hover { border-color: var(--steel); background: var(--paper); }

.details-band { border-block: 1px solid var(--line); background: var(--paper); }
.details-inner { padding-block: 34px 46px; }
.details-heading { margin: 0 0 16px; color: var(--navy); font-size: 20px; letter-spacing: 0; }
.detail-table { width: 100%; border-collapse: collapse; table-layout: fixed; background: var(--white); }
.detail-table th, .detail-table td { min-height: 48px; padding: 13px 15px; border: 1px solid var(--line); text-align: left; vertical-align: top; font-size: 12px; overflow-wrap: anywhere; }
.detail-table th { width: 38%; color: var(--muted); background: #fafbfa; font-weight: 650; }
.detail-table td { color: var(--ink); font-weight: 750; }

.site-footer { color: rgba(255,255,255,.74); background: var(--navy); }
.footer-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 11px; }

@media (min-width: 820px) {
  .product-overview { grid-template-columns: minmax(320px, 420px) minmax(0, 1fr); gap: 54px; align-items: start; padding-block: 42px 56px; }
  .detail-table th { width: 240px; }
}

@media (min-width: 900px) {
  .site-header { height: 4.6rem; display: flex; align-items: center; }
  .site-header > .wrap { display: flex; align-items: center; justify-content: space-between; }
  .header-logo { height: auto; }
  .logo img { height: 44px; }
  .main-nav { height: 4.6rem; display: flex; align-items: center; gap: 2.2rem; border: 0; }
  .main-nav a { height: 100%; padding: 0 .15rem; border: 0 !important; font-size: .9rem; }
  .main-nav a.active::after { right: 0; left: 0; }
  .header-search { position: static; width: 2.65rem; height: 2.65rem; margin-left: 1.3rem; }
}

@media (max-width: 520px) {
  .wrap { width: min(calc(100% - 24px), 1180px); }
  h1 { font-size: 27px; }
  .identity-row { grid-template-columns: 96px minmax(0, 1fr); gap: 10px; }
  .actions .button { width: 100%; }
  .detail-table th, .detail-table td { padding: 11px 10px; }
  .footer-inner { min-height: 68px; align-items: flex-start; flex-direction: column; justify-content: center; gap: 3px; }
}