:root {
  --navy-950: #04111d;
  --navy-900: #071726;
  --navy-800: #0d2639;
  --navy-700: #17364a;
  --cream: #f2efe8;
  --paper: #f8f7f3;
  --white: #ffffff;
  --gold: #d7aa55;
  --gold-soft: #eeddbb;
  --ink: #0a1b29;
  --muted: #64717a;
  --line: rgba(10, 27, 41, 0.14);
  --shell: min(1240px, calc(100vw - 64px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "DM Sans", sans-serif; font-size: 16px; line-height: 1.6; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.shell { width: var(--shell); margin-inline: auto; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .75rem 1rem; color: var(--white); background: var(--navy-900); }
.skip-link:focus { top: 1rem; }

.site-header { position: absolute; inset: 0 0 auto; z-index: 10; color: var(--white); border-bottom: 1px solid rgba(255,255,255,.16); }
.header-inner { width: var(--shell); height: 88px; margin: auto; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 2rem; }
.brand { display: inline-flex; align-items: center; gap: .75rem; width: max-content; }
.brand-name { font-family: "Manrope", sans-serif; font-weight: 700; letter-spacing: .18em; font-size: 1rem; }
.desktop-nav { display: flex; align-items: center; gap: 2rem; font-size: .9rem; }
.desktop-nav a { color: rgba(255,255,255,.76); transition: color .2s ease; }
.desktop-nav a:hover, .desktop-nav a:focus-visible { color: var(--white); }
.header-contact { justify-self: end; font-size: .9rem; display: flex; gap: .65rem; align-items: center; }
.header-contact span { color: var(--gold); }
.menu-toggle, .mobile-nav { display: none; }

.hero { min-height: 820px; height: 100svh; max-height: 940px; position: relative; color: var(--white); background: var(--navy-950); overflow: hidden; display: flex; align-items: center; }
.hero-media { position: absolute; inset: 0; background: var(--navy-900) url("./assets/holborn-hero.webp") center/cover no-repeat; transform: scale(1.015); }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,17,29,.97) 0%, rgba(4,17,29,.78) 38%, rgba(4,17,29,.2) 76%, rgba(4,17,29,.38) 100%), linear-gradient(0deg, rgba(4,17,29,.83) 0%, transparent 45%); }
.hero-content { position: relative; z-index: 1; padding-top: 64px; }
.eyebrow { margin: 0 0 1.4rem; color: var(--navy-700); text-transform: uppercase; font-size: .74rem; font-weight: 600; letter-spacing: .22em; }
.eyebrow.light { color: var(--gold-soft); }
.hero h1 { max-width: 850px; margin: 0; font: 500 clamp(4rem, 8vw, 7.6rem)/.92 "Manrope", sans-serif; letter-spacing: -.065em; }
.hero-copy { max-width: 610px; margin: 2rem 0 0; color: rgba(255,255,255,.76); font-size: clamp(1rem, 1.4vw, 1.2rem); line-height: 1.65; }
.hero-actions { margin-top: 2.35rem; display: flex; align-items: center; gap: 2rem; }
.button { min-height: 52px; padding: 0 1.35rem; display: inline-flex; align-items: center; justify-content: center; gap: 1.4rem; font-weight: 600; font-size: .91rem; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-gold { background: var(--gold); color: var(--navy-950); }
.button-navy { background: var(--navy-900); color: var(--white); }
.text-link { display: inline-flex; align-items: center; gap: .6rem; font-weight: 500; }
.light-link { color: rgba(255,255,255,.9); }
.light-link span { color: var(--gold); }
.hero-foot { position: absolute; z-index: 1; bottom: 0; left: 50%; transform: translateX(-50%); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid rgba(255,255,255,.18); }
.hero-foot > div { min-height: 104px; display: flex; align-items: center; gap: 1.1rem; border-right: 1px solid rgba(255,255,255,.18); }
.hero-foot > div:last-child { border-right: 0; padding-left: 2rem; }
.hero-foot > div:nth-child(2) { padding-left: 2rem; }
.hero-foot span { color: var(--gold); font-size: .7rem; letter-spacing: .18em; }
.hero-foot p { margin: 0; color: rgba(255,255,255,.72); line-height: 1.4; font-size: .87rem; }

.section { padding: 120px 0; }
.intro { background: var(--paper); }
.intro-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 9vw; }
h2 { margin: 0; font: 500 clamp(2.5rem, 4.5vw, 4.5rem)/1.03 "Manrope", sans-serif; letter-spacing: -.05em; }
.intro-copy { padding-top: 3.5rem; }
.intro-copy p { max-width: 640px; color: var(--muted); }
.intro-copy .lead { margin-top: 0; color: var(--ink); font-size: 1.22rem; }
.facts { margin-top: 3.5rem; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.facts div { padding: 1.4rem 1.2rem 0 0; border-right: 1px solid var(--line); }
.facts div + div { padding-left: 1.2rem; }
.facts div:last-child { border-right: 0; }
.facts strong { display: block; color: var(--navy-800); font: 600 1.45rem "Manrope", sans-serif; }
.facts span { color: var(--muted); font-size: .82rem; }

.business { background: var(--navy-900); color: var(--white); }
.section-heading { margin-bottom: 4rem; }
.split-heading { display: grid; grid-template-columns: 1.2fr .65fr; gap: 8vw; align-items: end; }
.split-heading > p, .products-heading > p { max-width: 440px; margin: 0 0 .4rem; color: rgba(255,255,255,.58); }
.process { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.14); border-bottom: 1px solid rgba(255,255,255,.14); }
.process-card { position: relative; min-height: 390px; padding: 2rem 2.4rem 2.4rem; border-right: 1px solid rgba(255,255,255,.14); overflow: hidden; }
.process-card:last-child { border-right: 0; }
.process-card::after { content: ""; position: absolute; inset: auto 0 0; height: 3px; background: var(--gold); transform: scaleX(0); transform-origin: left; transition: transform .35s ease; }
.process-card:hover::after { transform: scaleX(1); }
.process-number { color: rgba(255,255,255,.4); font-size: .74rem; letter-spacing: .18em; }
.process-icon { width: 72px; height: 72px; margin: 5rem 0 2rem; display: grid; place-items: center; color: var(--gold); background: rgba(215,170,85,.1); }
.process-icon svg { width: 43px; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: square; stroke-linejoin: miter; }
.process-card h3 { margin: 0 0 1rem; font: 500 1.45rem "Manrope", sans-serif; }
.process-card p { margin: 0; max-width: 310px; color: rgba(255,255,255,.56); }

.products { background: var(--cream); }
.products-heading { display: grid; grid-template-columns: 1.2fr .65fr; gap: 8vw; align-items: end; }
.products-heading > p { color: var(--muted); }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.product-grid article { min-height: 190px; padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .2s ease, color .2s ease; }
.product-grid article:hover { color: var(--white); background: var(--navy-800); }
.product-grid span { display: block; margin-bottom: 3.4rem; color: #988b70; font-size: .72rem; letter-spacing: .15em; }
.product-grid h3 { margin: 0; font: 600 1.25rem "Manrope", sans-serif; }
.product-grid p { margin: .3rem 0 0; color: var(--muted); font-size: .82rem; }
.product-grid article:hover p { color: rgba(255,255,255,.62); }

.standards { color: var(--white); background: var(--navy-950); overflow: hidden; }
.standards-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8vw; align-items: center; }
.standards-visual { position: relative; aspect-ratio: 1; max-width: 500px; display: grid; place-items: center; }
.core { width: 104px; height: 104px; display: grid; place-items: center; z-index: 1; border: 1px solid var(--gold); color: var(--gold); font: 500 2.6rem "Manrope", sans-serif; transform: rotate(45deg); }
.core::first-letter { transform: rotate(-45deg); }
.orbit { position: absolute; border: 1px solid rgba(255,255,255,.15); border-radius: 50%; }
.orbit::after { content: ""; position: absolute; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); top: 50%; left: -4px; box-shadow: 0 0 0 8px rgba(215,170,85,.08); }
.orbit-one { inset: 16%; animation: spin 18s linear infinite; }
.orbit-two { inset: 1%; border-style: dashed; animation: spin 34s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
.standards-copy > p:not(.eyebrow) { max-width: 580px; margin: 2rem 0 2.5rem; color: rgba(255,255,255,.58); }
.standards-copy ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.16); }
.standards-copy li { padding: 1.1rem 0; border-bottom: 1px solid rgba(255,255,255,.16); }
.standards-copy li span { margin-right: 1.2rem; color: var(--gold); font-size: .72rem; letter-spacing: .16em; }

.contact { background: var(--paper); }
.contact-wrap { display: grid; grid-template-columns: 1.2fr .8fr; gap: 9vw; align-items: start; }
.contact-card { padding: 2.5rem; background: var(--white); border-top: 3px solid var(--gold); box-shadow: 0 24px 65px rgba(7,23,38,.1); }
.contact-label { margin: 0 0 1.2rem; color: var(--muted); font-size: .75rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }
address { font-style: normal; font: 500 1.3rem/1.6 "Manrope", sans-serif; }
.contact-lines { margin: 2rem 0; border-top: 1px solid var(--line); }
.contact-lines a { padding: .9rem 0; display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--line); font-size: .9rem; }
.contact-lines span { color: var(--muted); }

footer { padding: 72px 0 24px; color: var(--white); background: var(--navy-900); }
.footer-main { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; padding-bottom: 70px; }
.footer-brand p { margin: .7rem 0 0; color: rgba(255,255,255,.48); }
.footer-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.footer-links div { display: flex; flex-direction: column; gap: .65rem; }
.footer-links span { margin-bottom: .4rem; color: var(--gold); font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; }
.footer-links a { color: rgba(255,255,255,.64); font-size: .9rem; }
.footer-bottom { min-height: 62px; display: grid; grid-template-columns: 1fr auto auto; align-items: end; gap: 2rem; border-top: 1px solid rgba(255,255,255,.14); color: rgba(255,255,255,.4); font-size: .72rem; }
.footer-bottom p { margin: 0; }
.footer-bottom a { color: rgba(255,255,255,.72); }

@media (max-width: 900px) {
  :root { --shell: min(100% - 40px, 720px); }
  .header-inner { height: 76px; grid-template-columns: 1fr auto; }
  .desktop-nav, .header-contact { display: none; }
  .menu-toggle { width: 42px; height: 42px; padding: 11px 8px; display: grid; align-content: center; gap: 7px; color: var(--white); background: transparent; border: 0; }
  .menu-toggle span { height: 1px; background: currentColor; }
  .mobile-nav { padding: 1rem 20px 1.5rem; background: rgba(4,17,29,.98); border-top: 1px solid rgba(255,255,255,.12); }
  .mobile-nav:not([hidden]) { display: grid; gap: 1rem; }
  .mobile-nav a { color: rgba(255,255,255,.78); }
  .hero { min-height: 780px; }
  .hero-content { padding-bottom: 120px; }
  .hero-foot { grid-template-columns: repeat(3, 1fr); }
  .hero-foot > div, .hero-foot > div:nth-child(2), .hero-foot > div:last-child { min-height: 92px; padding: .8rem; gap: .7rem; }
  .hero-foot p { font-size: .74rem; }
  .intro-grid, .split-heading, .products-heading, .standards-grid, .contact-wrap { grid-template-columns: 1fr; gap: 3rem; }
  .intro-copy { padding-top: 0; }
  .process { grid-template-columns: 1fr; }
  .process-card { min-height: 280px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.14); }
  .process-card:last-child { border-bottom: 0; }
  .process-icon { margin-top: 2.5rem; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .standards-visual { max-width: 400px; margin: auto; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom { grid-template-columns: 1fr; gap: .45rem; padding-top: 1.5rem; }
}

@media (max-width: 560px) {
  :root { --shell: calc(100vw - 32px); }
  .section { padding: 86px 0; }
  .hero { min-height: 720px; max-height: 820px; }
  .hero-media { background-position: 62% center; }
  .hero h1 { font-size: clamp(3.35rem, 17vw, 4.7rem); }
  .hero-copy { font-size: 1rem; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 1.1rem; }
  .hero-foot > div { border-right: 0; }
  .hero-foot > div:nth-child(3) { display: none; }
  .hero-foot { grid-template-columns: 1fr 1fr; }
  .facts { grid-template-columns: 1fr; }
  .facts div, .facts div + div { padding: 1rem 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .product-grid { grid-template-columns: 1fr; }
  .product-grid article { min-height: 150px; }
  .product-grid span { margin-bottom: 2.2rem; }
  .contact-card { padding: 1.5rem; }
  .contact-lines a { flex-direction: column; gap: .2rem; }
  .footer-links { grid-template-columns: 1fr 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

.brand-logo { display: block; width: 64px; height: auto; flex-shrink: 0; background: white; }
.footer-logo { width: 90px; margin-bottom: 1.2rem; }
.desktop-nav a { font-weight: 700 !important; }