:root {
  --ink: #121212;
  --ink-2: #4a4a4f;
  --ink-3: #7a7a80;
  --line: #e6e6e9;
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --bg-dark: #111214;
  --accent: #1f6feb;
  --accent-soft: #e8f0fe;
  --good: #1a7f37;
  --warn-bg: #fff7e6;
  --warn-line: #f5c26b;
  --radius: 14px;
  --max: 1200px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 .5em; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Announcement + header */
.announce { background: var(--bg-dark); color: #fff; font-size: 13px; text-align: center; padding: 9px 16px; letter-spacing: .02em; }
.announce span + span::before { content: "·"; margin: 0 10px; opacity: .5; }
.site-header { position: sticky; top: 0; z-index: 40; background: rgba(255,255,255,.92); backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 800; letter-spacing: .14em; text-decoration: none; font-size: 17px; }
.logo small { display: block; font-size: 10px; letter-spacing: .2em; font-weight: 500; color: var(--ink-3); margin-top: -2px; }
.nav { display: flex; gap: 28px; font-size: 14px; }
.nav a { text-decoration: none; color: var(--ink-2); }
.nav a:hover { color: var(--ink); }
.header-cta { font-size: 14px; font-weight: 600; text-decoration: none; padding: 9px 16px; border-radius: 999px; background: var(--ink); color: #fff; }

/* Breadcrumb */
.crumbs { font-size: 13px; color: var(--ink-3); padding: 18px 0 0; }
.crumbs a { text-decoration: none; }
.crumbs a:hover { text-decoration: underline; }

/* Product main */
.product { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 56px; padding: 20px 0 72px; }
.gallery { position: sticky; top: 88px; align-self: start; }
.gallery-main { position: relative; background: var(--bg-soft); border-radius: var(--radius); overflow: hidden; aspect-ratio: 1 / 1; cursor: zoom-in; }
.gallery-main img { width: 100%; height: 100%; object-fit: contain; transition: opacity .25s; }
.gallery-nav { position: absolute; top: 50%; transform: translateY(-50%); width: 40px; height: 40px; border-radius: 50%; border: 0; background: rgba(255,255,255,.9); box-shadow: 0 2px 10px rgba(0,0,0,.12); cursor: pointer; display: grid; place-items: center; }
.gallery-nav.prev { left: 12px; } .gallery-nav.next { right: 12px; }
.gallery-count { position: absolute; bottom: 12px; right: 12px; background: rgba(0,0,0,.6); color: #fff; font-size: 12px; padding: 3px 10px; border-radius: 999px; }
.thumbs { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; margin-top: 12px; }
.thumbs button { padding: 0; border: 2px solid transparent; border-radius: 10px; overflow: hidden; background: var(--bg-soft); cursor: pointer; aspect-ratio: 1; }
.thumbs button[aria-current="true"] { border-color: var(--ink); }
.thumbs img { width: 100%; height: 100%; object-fit: cover; }

.buybox .vendor { font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 8px; }
.buybox h1 { font-size: clamp(28px, 3.2vw, 38px); font-weight: 750; }
.buybox .subtitle { color: var(--ink-2); font-size: 17px; margin-bottom: 18px; }
.price-row { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 4px; }
.price { font-size: 30px; font-weight: 700; }
.price-note { color: var(--ink-3); font-size: 14px; }
.compare-note { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; color: var(--good); background: #e9f7ee; padding: 4px 10px; border-radius: 999px; margin: 8px 0 20px; text-decoration: none; }

.callout { border: 1px solid var(--warn-line); background: var(--warn-bg); border-radius: 12px; padding: 14px 16px; font-size: 14px; display: flex; gap: 12px; margin-bottom: 22px; }
.callout svg { flex: none; margin-top: 2px; color: #b26a00; }
.callout strong { display: block; margin-bottom: 2px; }
.callout p { margin: 0; color: var(--ink-2); }

.quick-feats { list-style: none; padding: 0; margin: 0 0 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 16px; font-size: 14px; }
.quick-feats li { display: flex; gap: 8px; align-items: center; color: var(--ink-2); }
.quick-feats svg { flex: none; color: var(--accent); }

.color-pick { margin-bottom: 20px; font-size: 14px; }
.color-pick .label { color: var(--ink-3); margin-bottom: 8px; }
.color-pick .label b { color: var(--ink); font-weight: 600; }
.swatch { width: 34px; height: 34px; border-radius: 50%; background: #1e1f22; outline: 2px solid var(--ink); outline-offset: 3px; }

.buy-form { display: grid; grid-template-columns: auto 1fr; gap: 12px; margin-bottom: 14px; }
.qty { display: flex; align-items: center; border: 1px solid #cfcfd4; border-radius: 999px; height: 54px; }
.qty button { width: 46px; height: 100%; border: 0; background: none; font-size: 20px; cursor: pointer; color: var(--ink-2); }
.qty input { width: 36px; text-align: center; border: 0; font: inherit; font-size: 16px; font-weight: 600; background: none; -moz-appearance: textfield; }
.qty input::-webkit-outer-spin-button, .qty input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; height: 54px; padding: 0 28px; border-radius: 999px; font: inherit; font-weight: 650; font-size: 16px; text-decoration: none; cursor: pointer; border: 0; transition: transform .08s, background .2s, opacity .2s; }
.btn:active { transform: scale(.985); }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #2b2b2f; }
.btn-primary[disabled] { opacity: .6; cursor: progress; }
.btn-light { background: #fff; color: var(--ink); }
.pay-line { display: flex; align-items: center; justify-content: center; gap: 8px; font-size: 13px; color: var(--ink-3); margin-bottom: 22px; }
.pay-brands { display: flex; justify-content: center; gap: 6px; margin-bottom: 26px; flex-wrap: wrap; }
.pay-brands span { font-size: 11px; font-weight: 700; letter-spacing: .03em; border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px; color: var(--ink-2); }

.trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 26px; }
.trust div { background: var(--bg-soft); border-radius: 12px; padding: 14px 10px; text-align: center; font-size: 12.5px; color: var(--ink-2); }
.trust svg { margin: 0 auto 6px; color: var(--ink); }
.trust b { display: block; color: var(--ink); font-size: 13.5px; }

.accordion details { border-top: 1px solid var(--line); }
.accordion details:last-child { border-bottom: 1px solid var(--line); }
.accordion summary { list-style: none; cursor: pointer; padding: 18px 0; font-weight: 600; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { content: ""; width: 10px; height: 10px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg); transition: transform .2s; flex: none; margin-right: 4px; }
.accordion details[open] summary::after { transform: rotate(-135deg); }
.accordion .acc-body { padding: 0 0 20px; color: var(--ink-2); font-size: 15px; }
.accordion .acc-body ul { margin: 0; padding-left: 20px; }
.accordion .acc-body li { margin-bottom: 4px; }

/* Sections */
section.band { padding: 88px 0; }
section.band.soft { background: var(--bg-soft); }
section.band.dark { background: var(--bg-dark); color: #fff; }
.eyebrow { font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 12px; }
.dark .eyebrow { color: #7fb0ff; }
.section-head { max-width: 680px; margin: 0 auto 48px; text-align: center; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 42px); font-weight: 750; }
.section-head p { color: var(--ink-2); font-size: 17px; }
.dark .section-head p { color: #b8b8c0; }

.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature { background: #fff; border-radius: var(--radius); padding: 26px 22px; border: 1px solid var(--line); }
.feature .ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); margin-bottom: 16px; }
.feature h3 { font-size: 17px; margin-bottom: 6px; }
.feature p { font-size: 14.5px; color: var(--ink-2); margin: 0; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split + .split { margin-top: 96px; }
.split.reverse .split-media { order: 2; }
.split-media { border-radius: 20px; overflow: hidden; background: var(--bg-soft); }
.split-media img { width: 100%; }
.split-copy h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 750; }
.split-copy > p { color: var(--ink-2); font-size: 17px; }
.check-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 12px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; }
.check-list svg { flex: none; color: var(--good); margin-top: 3px; }
.check-list b { display: block; }
.check-list span { color: var(--ink-2); font-size: 15px; }

/* Comparison */
.compare-wrap { max-width: 880px; margin: 0 auto; border-radius: 18px; overflow: hidden; border: 1px solid #2a2b30; background: #18191c; }
.compare { width: 100%; border-collapse: collapse; font-size: 15px; }
.compare th, .compare td { padding: 14px 18px; border-bottom: 1px solid #26272b; text-align: center; }
.compare th:first-child, .compare td:first-child { text-align: left; color: #d6d6dc; }
.compare thead th { font-size: 13px; letter-spacing: .04em; color: #b8b8c0; font-weight: 600; background: #141518; vertical-align: bottom; }
.compare thead th.ours { color: #fff; }
.compare td.ours, .compare th.ours { background: rgba(31,111,235,.12); }
.compare tr:last-child td { border-bottom: 0; }
.compare .yes { color: #4ade80; }
.compare .no { color: #6b6b73; }
.compare .price-cell { font-size: 20px; font-weight: 750; color: #fff; }
.compare .price-cell.theirs { color: #9a9aa2; font-weight: 600; }
.compare .tiny { display: block; font-size: 12px; color: #9a9aa2; font-weight: 400; }
.compare-foot { text-align: center; margin-top: 36px; }
.compare-foot p { color: #b8b8c0; max-width: 640px; margin: 0 auto 22px; font-size: 15px; }

/* Specs */
.specs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.spec-images { display: grid; gap: 18px; }
.spec-images img { border-radius: 16px; border: 1px solid var(--line); background: #fff; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.spec-table th, .spec-table td { padding: 13px 0; border-bottom: 1px solid var(--line); vertical-align: top; text-align: left; }
.spec-table th { color: var(--ink-3); font-weight: 500; width: 42%; padding-right: 16px; }
.spec-group { font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); font-weight: 700; padding-top: 28px !important; border-bottom: 0 !important; }

.box-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 8px; }
.box-item { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 18px; display: flex; gap: 12px; align-items: center; font-size: 14.5px; font-weight: 550; }
.box-item .n { width: 34px; height: 34px; border-radius: 50%; background: var(--ink); color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 700; flex: none; }

.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 24px; }
.stat { border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.stat b { display: block; font-size: 26px; letter-spacing: -0.02em; }
.stat span { color: var(--ink-2); font-size: 14px; }
.certs { display: flex; gap: 8px; margin-top: 18px; flex-wrap: wrap; }
.certs span { border: 1.5px solid var(--ink); border-radius: 8px; padding: 4px 12px; font-weight: 800; font-size: 13px; letter-spacing: .04em; }

/* FAQ */
.faq { max-width: 800px; margin: 0 auto; }
.faq summary { font-size: 17px; padding: 22px 0; }

/* CTA */
.cta { text-align: center; }
.cta img { width: 220px; margin: 0 auto 24px; mix-blend-mode: multiply; }
.cta h2 { font-size: clamp(28px, 3.6vw, 40px); }
.cta p { color: var(--ink-2); margin-bottom: 26px; }

/* Footer */
.site-footer { background: var(--bg-dark); color: #b8b8c0; font-size: 14px; padding: 48px 0 32px; }
.site-footer .cols { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.site-footer a { color: #e6e6ea; text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.site-footer .links { display: flex; gap: 20px; flex-wrap: wrap; }
.site-footer .legal { border-top: 1px solid #26272b; margin-top: 32px; padding-top: 20px; font-size: 13px; }

/* Sticky mobile bar */
.sticky-buy { position: fixed; left: 0; right: 0; bottom: 0; z-index: 50; background: #fff; border-top: 1px solid var(--line); box-shadow: 0 -6px 24px rgba(0,0,0,.08); padding: 10px 16px calc(10px + env(safe-area-inset-bottom)); display: flex; align-items: center; gap: 12px; transform: translateY(110%); transition: transform .25s; }
.sticky-buy.show { transform: none; }
.sticky-buy img { width: 48px; height: 48px; border-radius: 8px; background: var(--bg-soft); object-fit: contain; }
.sticky-buy .meta { flex: 1; min-width: 0; line-height: 1.3; }
.sticky-buy .meta b { display: block; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sticky-buy .meta span { font-size: 13px; color: var(--ink-3); }
.sticky-buy .btn { height: 46px; padding: 0 22px; font-size: 15px; }

/* Lightbox */
.lightbox { position: fixed; inset: 0; z-index: 100; background: rgba(10,10,12,.92); display: none; align-items: center; justify-content: center; padding: 24px; }
.lightbox.open { display: flex; }
.lightbox img { max-height: 90vh; max-width: 92vw; border-radius: 12px; background: #fff; }
.lightbox button { position: absolute; width: 44px; height: 44px; border-radius: 50%; border: 0; background: #fff; font-size: 22px; cursor: pointer; display: grid; place-items: center; }
.lightbox .lb-close { top: 16px; right: 16px; }
.lightbox .lb-nav { top: 50%; transform: translateY(-50%); display: none; }
.lightbox.has-nav .lb-nav { display: grid; }
.lightbox .lb-prev { left: 16px; }
.lightbox .lb-next { right: 16px; }

/* Installations gallery (masonry) */
.installs { columns: 3; column-gap: 16px; }
.install { display: block; margin-bottom: 16px; break-inside: avoid; border-radius: 14px; overflow: hidden; background: var(--bg-soft); cursor: zoom-in; }
.install img { width: 100%; transition: transform .4s ease; }
.install:hover img { transform: scale(1.03); }

/* Confirmation page */
.confirm { min-height: 100vh; display: grid; place-items: center; background: var(--bg-soft); padding: 24px 16px; }
.confirm-card { background: #fff; border-radius: 20px; padding: 44px 36px; max-width: 540px; width: 100%; text-align: center; box-shadow: 0 10px 40px rgba(0,0,0,.06); }
.confirm-icon { width: 64px; height: 64px; border-radius: 50%; background: #e9f7ee; color: var(--good); display: grid; place-items: center; margin: 0 auto 20px; }
.confirm-card h1 { font-size: 28px; }
.confirm-card p { color: var(--ink-2); }
.confirm-next { text-align: left; background: var(--bg-soft); border-radius: 14px; padding: 18px 22px; margin: 24px 0; font-size: 14.5px; }
.confirm-next h2 { font-size: 15px; margin-bottom: 8px; }
.confirm-next ul { margin: 0; padding-left: 18px; color: var(--ink-2); }

/* Responsive */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .product { gap: 36px; }
}
@media (max-width: 860px) {
  .nav { display: none; }
  .product { grid-template-columns: minmax(0, 1fr); padding-top: 12px; }
  .gallery { position: static; }
  .split, .specs-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .split.reverse .split-media { order: 0; }
  .split + .split { margin-top: 64px; }
  section.band { padding: 64px 0; }
  .box-list { grid-template-columns: 1fr 1fr; }
  .installs { columns: 2; column-gap: 10px; }
  .install { margin-bottom: 10px; border-radius: 10px; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 16px; }
  .announce span:nth-child(n+2) { display: none; }
  .thumbs { grid-template-columns: repeat(7, 1fr); gap: 6px; }
  .thumbs button { border-radius: 7px; }
  .quick-feats { grid-template-columns: 1fr; }
  .feature-grid, .box-list { grid-template-columns: 1fr; }
  .trust div { padding: 12px 6px; font-size: 11.5px; }
  .compare th, .compare td { padding: 12px 10px; font-size: 13.5px; }
  .compare .price-cell { font-size: 16px; }
  .header-cta { padding: 8px 14px; }
  .confirm-card { padding: 32px 20px; }
}
@media (min-width: 861px) { .sticky-buy { display: none; } }

/* Policy pages */
.policy { max-width: 760px; padding-bottom: 80px; }
.policy h1 { font-size: clamp(30px, 4vw, 42px); margin-top: 24px; }
.policy h2 { font-size: 20px; margin: 36px 0 10px; }
.policy p, .policy li { color: var(--ink-2); }
.policy ul, .policy ol { padding-left: 22px; }
.policy li { margin-bottom: 6px; }
.policy a { color: var(--accent); }
.policy .btn { color: #fff; }
.policy-meta { color: var(--ink-3); font-size: 14px; }
.policy-summary { background: var(--bg-soft); border-radius: var(--radius); padding: 22px 26px; margin: 28px 0 8px; }
.policy-summary h2 { margin-top: 0; font-size: 17px; }
.policy-summary ul { margin: 0; }
.returns-note { text-align: center; font-size: 13px; color: var(--ink-3); margin: -14px 0 22px; }
.returns-note a { color: var(--ink-2); }
.policy h3.policy-tip { font-size: 16px; margin: 24px 0 6px; }
.callout .fit-check { margin-top: 8px; }
.callout .fit-check a { color: var(--ink); font-weight: 600; }

/* Comparison page */
.cmp-hero { padding: 0 0 72px; }
.cmp-hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 56px; align-items: center; margin-top: 24px; }
.cmp-hero h1 { font-size: clamp(32px, 4.4vw, 52px); font-weight: 800; }
.cmp-lead { font-size: 18px; color: var(--ink-2); }
.cmp-hero-img { background: var(--bg-soft); border-radius: 20px; overflow: hidden; }
.cmp-prices { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 26px 0; }
.cmp-price { border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; }
.cmp-price span { display: block; font-size: 13px; color: var(--ink-3); }
.cmp-price b { display: block; font-size: 30px; letter-spacing: -0.02em; color: var(--ink-3); }
.cmp-price small { color: var(--ink-3); font-size: 12.5px; }
.cmp-price.ours { border-color: var(--ink); background: var(--bg-soft); }
.cmp-price.ours b { color: var(--ink); }
.cmp-ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-outline { background: #fff; color: var(--ink); border: 1.5px solid var(--ink); }
@media (max-width: 860px) {
  .cmp-hero-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .cmp-hero-img { order: -1; max-width: 420px; }
}
.compare .na { color: #8a8a92; font-size: 13px; }
.compare-source { font-size: 12.5px; color: #8a8a92; padding: 12px 18px; margin: 0; border-top: 1px solid #26272b; }
.compare-source a { color: #b8b8c0; }
.why-link { text-align: center; margin: 32px 0 0; font-size: 15px; color: var(--ink-2); }
.why-link a { color: var(--ink); font-weight: 600; }
.dark .why-link { color: #b8b8c0; }
.dark .why-link a { color: #fff; }
.soft .install { background: #fff; }
.dark .feature { color: var(--ink); }
.faq-img { max-width: 320px; width: 100%; border: 1px solid var(--line); border-radius: 12px; margin: 4px 0 16px; background: #fff; }
.accordion .acc-body ol { margin: 0 0 12px; padding-left: 20px; }