.product-page { background: var(--paper); color: var(--ink); }
.product-page .site-header { position: sticky; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 34px; color: #777b80; font: 10px/1.4 "Courier New", monospace; text-transform: uppercase; letter-spacing: .08em; }
.breadcrumbs a:hover { color: var(--amber); }

.product-hero { padding: 64px 0 0; overflow: hidden; background: var(--ink); color: var(--white); }
.product-hero-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(420px,.72fr); align-items: stretch; gap: 54px; }
.product-hero-copy { padding: 24px 0 68px; }
.product-kicker { display: flex; align-items: center; gap: 10px; margin: 0 0 24px; color: var(--amber); font: 700 11px/1.2 "Courier New", monospace; text-transform: uppercase; letter-spacing: .14em; }
.product-kicker::before { content: ""; width: 28px; height: 2px; background: var(--amber); }
.product-hero h1 { max-width: 900px; margin: 0; font-size: clamp(48px,6.1vw,94px); line-height: .88; letter-spacing: -.065em; text-transform: uppercase; }
.product-lead { max-width: 780px; margin: 30px 0 0; color: #a6a9ad; font-size: clamp(16px,1.3vw,20px); line-height: 1.65; }
.product-buy { display: flex; flex-wrap: wrap; align-items: end; gap: 36px; margin-top: 38px; }
.product-buy > div { display: grid; grid-template-columns: auto auto; align-items: end; gap: 7px 18px; }
.product-buy small { grid-column: 1/3; color: #777b80; font: 10px/1 "Courier New", monospace; text-transform: uppercase; letter-spacing: .09em; }
.product-buy b { color: var(--amber); font: 900 clamp(29px,3vw,46px)/1 "Courier New", monospace; }
.product-buy span { margin-bottom: 5px; padding: 7px 9px; border: 1px solid #4b4e52; color: #c8cacc; font: 700 9px/1 "Courier New", monospace; text-transform: uppercase; }
.product-photo { position: relative; min-height: 520px; display: flex; flex-direction: column; justify-content: space-between; align-items: flex-start; padding: 24px; background: linear-gradient(0deg,rgba(11,12,13,.78),transparent 52%),url("../assets/fiberglass-hero.webp") center/cover no-repeat; clip-path: polygon(9% 0,100% 0,100% 90%,90% 100%,0 100%,0 9%); }
.product-photo span { padding: 9px 12px; background: rgba(11,12,13,.88); color: var(--amber); font: 700 10px/1 "Courier New", monospace; text-transform: uppercase; letter-spacing: .1em; }
.product-photo b { position: relative; z-index: 1; color: #fff; font: 900 30px/1 "Courier New", monospace; }
.product-specs { display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid var(--line-dark); }
.product-specs div { min-height: 105px; padding: 25px 22px; display: flex; flex-direction: column; justify-content: space-between; gap: 14px; border-right: 1px solid var(--line-dark); }
.product-specs div:first-child { border-left: 1px solid var(--line-dark); }
.product-specs span { color: #74777b; font: 9px/1 "Courier New", monospace; text-transform: uppercase; letter-spacing: .1em; }
.product-specs b { color: #fff; font-size: 18px; }

.product-layout { display: grid; grid-template-columns: minmax(0,1fr) 320px; gap: 92px; padding-block: 90px 112px; }
.product-copy { min-width: 0; }
.product-copy section > h2 { margin: 60px 0 19px; padding-top: 18px; border-top: 1px solid var(--ink); font-size: clamp(30px,3.2vw,47px); line-height: 1; letter-spacing: -.045em; text-transform: uppercase; }
.product-copy section:first-of-type > h2 { margin-top: 20px; }
.product-copy p { margin: 0 0 18px; color: #4f514e; font-size: 16px; line-height: 1.8; }
.product-copy ul { margin: 4px 0 26px; padding: 0; list-style: none; border-top: 1px solid var(--line-light); }
.product-copy li { position: relative; padding: 15px 18px 15px 32px; border-bottom: 1px solid var(--line-light); color: #4f514e; font-size: 15px; line-height: 1.45; }
.product-copy li::before { content: "↗"; position: absolute; left: 3px; color: var(--amber-dark); font-weight: 900; }
.product-warning { margin: 42px 0; padding: 26px 29px; border-left: 5px solid var(--amber); background: var(--paper-warm); }
.product-warning b { display: block; margin-bottom: 9px; font-size: 12px; text-transform: uppercase; letter-spacing: .07em; }
.product-warning p { margin: 0; font-size: 14px; }

.product-aside { min-width: 0; }
.product-aside-inner { position: sticky; top: 112px; padding: 30px; background: var(--ink); color: var(--white); }
.product-aside-inner > p { margin: 0 0 18px; color: #7b7e82; font: 10px/1 "Courier New", monospace; text-transform: uppercase; letter-spacing: .1em; }
.product-aside h2 { margin: 0 0 24px; color: var(--amber); font: 900 33px/1 "Courier New", monospace; }
.product-aside ul { margin: 0 0 27px; padding: 0; list-style: none; border-top: 1px solid var(--line-dark); }
.product-aside li { padding: 13px 0; border-bottom: 1px solid var(--line-dark); color: #a1a4a7; font-size: 12px; line-height: 1.45; }
.product-aside .button { width: 100%; }
.product-aside small { display: block; margin-top: 20px; color: #6e7175; font: 9px/1.5 "Courier New", monospace; }

.product-faq { margin-top: 76px; }
.product-faq details { border-bottom: 1px solid var(--line-light); }
.product-faq summary { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 18px; cursor: pointer; list-style: none; font-size: 15px; font-weight: 800; }
.product-faq summary::-webkit-details-marker { display: none; }
.product-faq summary span { color: var(--amber-dark); font-size: 24px; transition: transform .2s ease; }
.product-faq details[open] summary span { transform: rotate(45deg); }
.product-faq details p { margin: -2px 40px 23px 0; font-size: 14px; }

.product-related { padding-block: 84px; background: var(--paper-warm); }
.related-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 38px; }
.related-heading h2 { margin: 0; font-size: clamp(44px,5.5vw,80px); line-height: .88; letter-spacing: -.06em; text-transform: uppercase; }
.related-products { display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid #bbb8af; border-left: 1px solid #bbb8af; }
.related-product { min-height: 270px; padding: 27px; display: flex; flex-direction: column; border-right: 1px solid #bbb8af; border-bottom: 1px solid #bbb8af; background: var(--paper); transition: transform .2s ease,background .2s ease; }
.related-product:hover { position: relative; z-index: 1; transform: translateY(-4px); background: #fff; }
.related-product small { color: var(--amber-dark); font: 700 9px/1.3 "Courier New", monospace; text-transform: uppercase; letter-spacing: .08em; }
.related-product h3 { margin: 25px 0 16px; font-size: 23px; line-height: 1.08; letter-spacing: -.035em; text-transform: uppercase; }
.related-product p { margin: 0; font: 900 20px/1 "Courier New", monospace; }
.related-product b { margin-top: auto; padding-top: 25px; font-size: 12px; }
.product-cta { padding-block: 82px; background: var(--paper); }
.product-cta-card { display: flex; align-items: end; justify-content: space-between; gap: 50px; padding: 58px; background: var(--ink); color: var(--white); }
.product-cta h2 { margin: 0 0 18px; font-size: clamp(45px,5vw,76px); line-height: .9; letter-spacing: -.055em; text-transform: uppercase; }
.product-cta p:not(.section-index) { max-width: 650px; margin: 0; color: #96999d; font-size: 14px; line-height: 1.6; }

@media (max-width: 1100px) {
  .product-hero-grid { grid-template-columns: minmax(0,1fr) 390px; gap: 34px; }
  .product-layout { grid-template-columns: minmax(0,1fr) 280px; gap: 54px; }
}
@media (max-width: 820px) {
  .product-hero { padding-top: 45px; }
  .product-hero-grid { grid-template-columns: minmax(0,1fr); }
  .product-hero-copy { padding-bottom: 20px; }
  .product-photo { min-height: 390px; }
  .product-specs { grid-template-columns: repeat(2,1fr); }
  .product-layout { grid-template-columns: minmax(0,1fr); gap: 45px; padding-block: 60px 78px; }
  .product-aside-inner { position: static; }
  .related-heading { align-items: start; flex-direction: column; }
  .related-products { grid-template-columns: 1fr; }
  .related-product { min-height: 225px; }
  .product-cta-card { align-items: start; flex-direction: column; padding: 42px 25px; }
}
@media (max-width: 500px) {
  .product-hero h1 { font-size: clamp(38px,12vw,57px); }
  .product-buy { align-items: stretch; flex-direction: column; }
  .product-buy .button { width: 100%; }
  .product-photo { min-height: 310px; }
  .product-specs { grid-template-columns: 1fr; }
  .product-specs div { min-height: 82px; }
  .product-copy p { font-size: 15px; }
}