:root {
  --porcelain: #F7F7F4; --white: #FFFFFF; --ink: #171717; --graphite: #454545;
  --stone: #E8E6E1; --agal: #101010; --divider: #DDDAD5; --studio: #D9D9D6;
  --serif: 'Cormorant Garamond', 'Times New Roman', serif;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --gutter: clamp(16px, 4vw, 56px);
  --max: 1240px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body { margin: 0; background: var(--porcelain); color: var(--ink); font: 400 16px/1.65 var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.skip { position: absolute; inset-inline-start: 8px; top: -80px; background: var(--ink); color: var(--white); padding: 8px 14px; z-index: 100; }
.skip:focus { top: 8px; }

/* header */
.top { position: sticky; top: 0; z-index: 40; background: rgba(247, 247, 244, .86); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); border-bottom: 1px solid transparent; transition: border-color .4s var(--ease); }
.top.scrolled { border-color: var(--divider); }
.top .in { max-width: var(--max); margin: 0 auto; padding: 18px var(--gutter); display: flex; align-items: center; gap: 28px; }
.brand { font: 500 15px/1 var(--sans); letter-spacing: .32em; text-decoration: none; text-transform: uppercase; white-space: nowrap; }
.top .brand { display: block; line-height: 0; }
.top .brand img { height: 30px; width: auto; }
.nav { display: flex; gap: 26px; margin-inline-start: auto; }
.nav a { font-size: 13px; letter-spacing: .08em; text-decoration: none; color: var(--graphite); padding: 6px 0; border-bottom: 1px solid transparent; transition: color .3s, border-color .3s; }
.nav a:hover, .nav a[aria-current] { color: var(--ink); border-color: var(--ink); }
.nav .lang { color: var(--ink); }
html:not([lang=ar]) .nav .lang { font-family: 'IBM Plex Sans Arabic', var(--sans); letter-spacing: 0; font-size: 14px; }
.menu { display: none; margin-inline-start: auto; background: none; border: 0; font: inherit; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; padding: 10px 0; cursor: pointer; color: var(--ink); }
@media (max-width: 760px) {
  .menu { display: block; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--porcelain); border-bottom: 1px solid var(--divider); padding: 8px var(--gutter) 18px; }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; font-size: 15px; }
}

/* type */
.eyebrow { font: 500 11px/1.4 var(--sans); letter-spacing: .28em; text-transform: uppercase; color: var(--graphite); margin: 0 0 22px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; margin: 0; letter-spacing: -.005em; }
h1 { font-size: clamp(44px, 7.4vw, 104px); line-height: .98; }
h2 { font-size: clamp(34px, 4.6vw, 64px); line-height: 1.04; }
h3 { font-size: clamp(24px, 2.4vw, 32px); line-height: 1.15; }
.lede { font: 300 italic clamp(20px, 2vw, 26px)/1.45 var(--serif); color: var(--graphite); max-width: 34ch; margin: 22px 0 0; }
p { max-width: 62ch; color: var(--graphite); }
.btn { display: inline-flex; align-items: center; gap: 12px; min-height: 48px; padding: 0 26px; border: 1px solid var(--ink); background: var(--ink); color: var(--white); font: 500 12px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; text-decoration: none; cursor: pointer; transition: background .35s var(--ease), color .35s var(--ease); }
.btn:hover { background: transparent; color: var(--ink); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: var(--white); }

/* sections */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
section { padding: clamp(80px, 12vw, 160px) 0; }
section.alt { background: var(--stone); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: center; }
.split.rev > :first-child { order: 2; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } .split.rev > :first-child { order: 0; } }
.figure { background: var(--studio); aspect-ratio: 1; overflow: hidden; }
.figure img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.6s var(--ease); }
.figure:hover img { transform: scale(1.025); }
.cap-note { font-size: 12px; letter-spacing: .04em; color: var(--graphite); margin-top: 12px; }

/* hero */
.hero { position: relative; padding: 0; background: var(--studio); min-height: min(92vh, 980px); display: flex; align-items: center; overflow: hidden; }
.hero picture, .hero picture img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 62% 50%; }
.hero .copy { position: relative; z-index: 1; max-width: var(--max); width: 100%; margin: 0 auto; padding: 120px var(--gutter); }
.hero h1 { max-width: 9ch; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 40px; }
@media (max-width: 760px) {
  .hero { min-height: auto; flex-direction: column; align-items: stretch; }
  .hero picture { position: relative; display: block; aspect-ratio: 4/3; }
  .hero picture img { object-position: 78% 60%; }
  .hero .copy { padding: 36px var(--gutter) 64px; }
}

/* viewer */
.viewer-sec { padding-bottom: 0; }
.stage { position: relative; background: radial-gradient(120% 90% at 50% 40%, #f1f1ee 0%, #dcdcd8 100%); height: min(78vh, 820px); min-height: 460px; margin-top: 48px; }
.stage canvas { display: block; width: 100% !important; height: 100% !important; touch-action: none; cursor: grab; }
.stage canvas:active { cursor: grabbing; }
.stage .poster { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; transition: opacity .9s var(--ease); pointer-events: none; }
.stage.ready .poster { opacity: 0; }
.loading { position: absolute; left: 50%; bottom: 28px; transform: translateX(-50%); font-size: 11px; letter-spacing: .24em; text-transform: uppercase; color: var(--graphite); display: flex; align-items: center; gap: 14px; }
.loading .bar { width: 120px; height: 1px; background: var(--divider); position: relative; overflow: hidden; }
.loading .bar i { position: absolute; inset: 0; width: 0; background: var(--ink); transition: width .3s; }
.stage.ready .loading { display: none; }
.controls { display: flex; flex-wrap: wrap; gap: 28px 48px; padding: 28px 0 0; align-items: flex-start; }
.group { display: flex; flex-direction: column; gap: 10px; }
.group > span { font-size: 11px; letter-spacing: .24em; text-transform: uppercase; color: var(--graphite); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { min-height: 40px; min-width: 44px; padding: 0 14px; background: transparent; border: 1px solid var(--divider); font: 400 13px/1 var(--sans); color: var(--ink); cursor: pointer; transition: border-color .3s, background .3s, color .3s; }
.chip:hover { border-color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--white); border-color: var(--ink); }
.serial-in { display: flex; gap: 6px; }
.serial-in input { width: 110px; min-height: 40px; border: 1px solid var(--divider); background: var(--white); padding: 0 12px; font: 500 14px var(--sans); letter-spacing: .14em; color: var(--ink); }
.nogl { position: absolute; inset: auto 0 24px; text-align: center; font-size: 13px; color: var(--graphite); }

/* gallery */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 56px; }
.gallery figure { margin: 0; }
.gallery figcaption { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--graphite); padding: 12px 0 0; }
@media (max-width: 760px) { .gallery { grid-template-columns: repeat(2, 1fr); } }

/* rope compare */
.ropes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 48px; }
.ropes figure { margin: 0; }
.ropes figcaption { padding-top: 10px; font-size: 13px; color: var(--graphite); }
@media (max-width: 640px) { .ropes { grid-template-columns: 1fr; } }

/* details list */
.specs { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 0 48px; margin-top: 56px; border-top: 1px solid var(--divider); }
.specs div { padding: 22px 0; border-bottom: 1px solid var(--divider); }
.specs dt { font-size: 11px; letter-spacing: .24em; text-transform: uppercase; color: var(--graphite); margin-bottom: 6px; }
.specs dd { margin: 0; font: 400 20px/1.35 var(--serif); }

/* steps (authentication) */
.steps { counter-reset: s; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 40px; margin-top: 56px; }
.steps li { list-style: none; counter-increment: s; border-top: 1px solid var(--ink); padding-top: 20px; }
.steps li::before { content: counter(s, decimal-leading-zero); font: 400 15px var(--serif); color: var(--graphite); display: block; margin-bottom: 12px; }
.steps ol { padding: 0; }

/* forms */
form.f { display: grid; gap: 18px; max-width: 560px; }
.f label { display: grid; gap: 8px; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--graphite); }
.f input, .f textarea, .f select { font: 400 16px var(--sans); color: var(--ink); background: var(--white); border: 1px solid var(--divider); padding: 13px 14px; border-radius: 0; text-transform: none; letter-spacing: 0; }
.f input:focus, .f textarea:focus { border-color: var(--ink); outline: none; }
.f .check { display: flex; gap: 12px; align-items: flex-start; text-transform: none; letter-spacing: 0; font-size: 14px; }
.f .check input { margin-top: 4px; }
.f .err { color: #8a1c1c; font-size: 13px; text-transform: none; letter-spacing: 0; min-height: 1em; }
.f .hp { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.notice { border-inline-start: 2px solid var(--ink); padding: 14px 18px; background: var(--white); font-size: 14px; color: var(--graphite); max-width: 62ch; }

/* verify result */
.result { margin-top: 32px; padding: 28px; background: var(--white); border: 1px solid var(--divider); max-width: 560px; }
.result h3 { margin-bottom: 8px; }
.result.ok { border-color: #2f5d3a; }
.result.bad { border-color: #8a1c1c; }
.result dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 20px; margin: 18px 0 0; font-size: 14px; }
.result dt { color: var(--graphite); }
.result dd { margin: 0; }

/* footer */
footer { border-top: 1px solid var(--divider); padding: 56px 0 40px; font-size: 13px; color: var(--graphite); }
footer .in { display: flex; flex-wrap: wrap; gap: 24px 48px; align-items: baseline; }
footer nav { display: flex; gap: 24px; flex-wrap: wrap; }
footer a { text-decoration: none; }
footer a:hover { color: var(--ink); }
footer small { margin-inline-start: auto; }

/* reveal */
.js .rv { opacity: 0; transform: translateY(18px); transition: opacity 1.2s var(--ease), transform 1.2s var(--ease); }
.js .rv.in { opacity: 1; transform: none; }
.legal h2 { font-size: clamp(26px, 3vw, 36px); margin: 48px 0 12px; }

/* Arabic (RTL) pages: Arabic faces, no letter-spacing (it breaks the joins), no forced capitals or italics */
html[lang=ar] { --serif: 'Noto Kufi Arabic', 'IBM Plex Sans Arabic', serif; --sans: 'IBM Plex Sans Arabic', system-ui, sans-serif; }
html[lang=ar] body { font-size: 17px; line-height: 1.8; }
html[lang=ar] :is(.eyebrow, .brand, .nav a, .menu, .btn, .group > span, .gallery figcaption, .specs dt, .f label, .loading, .cap-note, #l-serial) { letter-spacing: 0; text-transform: none; }
html[lang=ar] .eyebrow { font-size: 13px; font-weight: 600; }
html[lang=ar] .btn { font-size: 14px; }
html[lang=ar] h1, html[lang=ar] h2, html[lang=ar] h3 { font-weight: 300; letter-spacing: 0; }
html[lang=ar] h1 { line-height: 1.25; }
html[lang=ar] h2 { line-height: 1.35; }
html[lang=ar] .lede { font: 300 clamp(19px, 1.8vw, 23px)/1.8 var(--sans); }
html[lang=ar] .specs dd { font: 400 18px/1.6 var(--sans); }
html[lang=ar] .nav .lang { font-family: 'Inter', system-ui, sans-serif; }
html[lang=ar] .hero picture img { transform: scaleX(-1); }       /* cap on the left, text on the right */
html[lang=ar] .hero h1 { max-width: 11ch; }