:root {
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(29, 29, 31, .1);
  --paper: #f5f5f7;
  --white: #fff;
  --blue: #0071e3;
  --blue-soft: #eaf3ff;
  --radius: 26px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; overflow-x: hidden; color: var(--ink); background: var(--paper); font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; -webkit-font-smoothing: antialiased; }
body::before { position: fixed; z-index: -1; inset: 0; background: radial-gradient(ellipse at 78% 8%, rgba(0, 113, 227, .045), transparent 32%); content: ""; pointer-events: none; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
img { max-width: 100%; }
.section-shell { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 50; top: 8px; left: 8px; padding: 12px 16px; transform: translateY(-150%); border-radius: 10px; color: #fff; background: var(--ink); }
.skip-link:focus { transform: none; }
.scroll-progress { position: fixed; z-index: 40; inset: 0 auto auto 0; width: 100%; height: 2px; transform: scaleX(0); transform-origin: left; background: var(--blue); }
.eyebrow, .step-label, .orbit-label, .photo-caption { font: 500 10px/1.5 "DM Mono", monospace; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow { margin: 0 0 18px; color: var(--muted); }
.site-header { position: fixed; z-index: 30; inset: 0 0 auto; height: 72px; border-bottom: 1px solid transparent; background: rgba(245, 245, 247, .88); backdrop-filter: blur(18px); transition: border-color .25s ease, background .25s ease, box-shadow .25s ease; }
.site-header.is-scrolled { border-color: var(--line); background: rgba(245, 245, 247, .96); box-shadow: 0 5px 24px rgba(29, 29, 31, .045); }
.header-inner { display: flex; height: 100%; align-items: center; justify-content: space-between; }
.brand, .footer-brand { display: inline-flex; flex: 0 0 auto; align-items: flex-start; font-size: 19px; font-weight: 700; letter-spacing: -.08em; }
.brand > span, .footer-brand { color: var(--ink); }
.brand sup, .footer-brand span { margin: 1px 0 0 2px; color: var(--blue); font: 500 9px "DM Mono", monospace; letter-spacing: -.04em; }
.main-nav { display: flex; gap: 32px; margin-left: auto; margin-right: 35px; }
.main-nav a, .site-footer > a:not(.footer-brand) { color: var(--muted); font-size: 12px; font-weight: 500; transition: color .2s ease; }
.main-nav a:hover, .site-footer a:hover, .text-link:hover { color: var(--blue); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 16px; padding: 0 20px; border: 1px solid transparent; border-radius: 999px; font-size: 13px; font-weight: 600; transition: transform .2s var(--ease), background .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(0, 113, 227, .14); }
.button-small { min-height: 42px; padding: 0 17px; font-size: 12px; }
.button-primary { color: #fff; background: var(--blue); }
.button-primary:hover { background: #0065cc; }
.button-light { color: var(--ink); background: #fff; }
.button-light:hover { background: var(--blue-soft); }
.button span, .text-link span { color: currentColor; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; border-radius: 50%; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 21px; height: 2px; margin: 5px auto; border-radius: 2px; background: var(--ink); transition: transform .2s ease; }
.menu-toggle.is-open span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle.is-open span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

.hero { position: relative; display: flex; min-height: 735px; align-items: center; padding-top: 92px; padding-bottom: 78px; }
.hero-copy { position: relative; z-index: 2; max-width: 815px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { letter-spacing: -.07em; }
h1 { max-width: 820px; margin-bottom: 24px; font-size: clamp(48px, 6.1vw, 82px); line-height: .99; }
h1 em, h2 em { color: #a1a1a6; font-style: normal; }
.hero-lede { max-width: 440px; margin-bottom: 0; color: var(--muted); font-size: 17px; line-height: 1.6; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-top: 30px; }
.text-link { display: inline-flex; min-height: 44px; align-items: center; gap: 10px; color: var(--ink); font-size: 13px; font-weight: 600; transition: color .2s ease; }
.hero-orbit { position: absolute; top: 175px; right: 0; width: 300px; height: 300px; color: var(--blue); }
.orbit { position: absolute; top: 50%; left: 50%; border: 1px solid rgba(0, 113, 227, .15); border-radius: 50%; transform: translate(-50%, -50%); }
.orbit-outer { width: 290px; height: 290px; }
.orbit-inner { width: 205px; height: 205px; border-color: rgba(0, 113, 227, .22); }
.orbit-center { position: absolute; top: 50%; left: 50%; display: flex; width: 90px; height: 90px; align-items: center; justify-content: center; border-radius: 50%; background: var(--blue-soft); font: 500 28px "DM Mono", monospace; transform: translate(-50%, -50%); }
.orbit-center sup { align-self: flex-start; margin: 20px 0 0 2px; font-size: 9px; }
.orbit-dot { position: absolute; top: 50%; left: 50%; width: 9px; height: 9px; border: 2px solid var(--paper); border-radius: 50%; background: var(--blue); }
.orbit-dot-one { animation: orbit 13s linear infinite; transform-origin: 0 0; }
.orbit-dot-two { width: 7px; height: 7px; background: #91bff0; animation: orbit 18s linear infinite reverse; transform-origin: 0 0; }
@keyframes orbit { to { transform: rotate(360deg) translateX(145px) rotate(-360deg); } }
.orbit-label { position: absolute; right: 0; left: 0; color: var(--muted); text-align: center; font-size: 8px; }
.orbit-label-top { top: 0; }.orbit-label-bottom { bottom: 0; }
.scroll-cue { position: absolute; bottom: 35px; left: 0; display: flex; align-items: center; gap: 12px; color: var(--muted); font: 9px "DM Mono", monospace; letter-spacing: .08em; text-transform: uppercase; }
.scroll-cue span:last-child { color: var(--blue); font-size: 17px; }

.method-section, .test-section, .how-section, .xray-section, .about-section { padding-top: 120px; padding-bottom: 120px; }
.section-heading { max-width: 760px; margin-bottom: 48px; }
h2 { margin-bottom: 20px; font-size: clamp(40px, 5.3vw, 68px); line-height: 1.02; }
.section-lede { max-width: 570px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.7; }
.sorria-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.sorria-card { position: relative; min-height: 230px; padding: 25px; overflow: hidden; border: 1px solid rgba(29, 29, 31, .055); border-radius: 22px; background: rgba(255,255,255,.82); box-shadow: 0 8px 30px rgba(29,29,31,.035); transition: transform .3s var(--ease), box-shadow .3s ease; }
.sorria-card:hover, .how-card:hover { transform: translateY(-4px); box-shadow: 0 15px 36px rgba(29,29,31,.08); }
.letter { position: absolute; top: 12px; right: 19px; color: rgba(0, 113, 227, .11); font: 500 96px/.95 "DM Mono", monospace; }
.step-label { display: block; margin-bottom: 31px; color: var(--blue); font-size: 9px; }
.sorria-card h3, .how-card h3 { position: relative; margin-bottom: 9px; font-size: 19px; letter-spacing: -.045em; }
.sorria-card p, .how-card p { position: relative; max-width: 310px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }

.test-section { border-top: 1px solid var(--line); }
.test-section .section-heading { max-width: 850px; }
.test-layout { display: grid; grid-template-columns: 1.3fr .7fr; align-items: start; gap: 25px; }
.test-steps { overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.test-step { display: grid; grid-template-columns: 47px 1fr; gap: 14px; padding: 22px 24px; border-bottom: 1px solid var(--line); }
.test-step:last-child { border-bottom: 0; }
.step-number { color: var(--blue); font: 500 11px "DM Mono", monospace; }
.test-step h3 { margin-bottom: 6px; font-size: 16px; letter-spacing: -.035em; }
.test-step p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.check-list { display: grid; gap: 0; margin: 12px 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding: 9px 0 9px 19px; border-top: 1px solid rgba(29,29,31,.07); color: var(--muted); font-size: 12px; line-height: 1.45; }
.check-list li::before { position: absolute; top: 9px; left: 0; color: var(--blue); content: "•"; }
.test-callout { position: sticky; top: 100px; padding: 28px; border-radius: 22px; background: var(--blue-soft); }
.test-callout .eyebrow { color: var(--blue); }
.test-callout h3 { margin: 32px 0 12px; font-size: 26px; letter-spacing: -.055em; line-height: 1.12; }
.test-callout p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }

.how-section { background: #fff; }
.how-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.how-card { min-height: 190px; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: var(--paper); transition: transform .3s var(--ease), box-shadow .3s ease; }
.how-card .step-number { display: inline-block; margin-bottom: 25px; }
.how-card h3 { font-size: 18px; }
.how-budget { grid-column: 1 / -1; min-height: 160px; }
.metric-note { display: flex; min-height: 86px; flex-wrap: wrap; align-items: center; gap: 10px 22px; margin-top: 22px; padding: 20px 24px; border-radius: 18px; color: #fff; background: var(--ink); }
.metric-note .eyebrow { width: 100%; margin: 0; color: #a1a1a6; }
.metric-note strong { font-size: 17px; letter-spacing: -.03em; }
.metric-formula { color: #b8b8bd; font: 10px "DM Mono", monospace; }

.xray-section { padding-bottom: 130px; }
.xray-card { display: grid; grid-template-columns: .95fr 1.05fr; gap: 60px; align-items: center; padding: clamp(28px, 5vw, 64px); border: 1px solid var(--line); border-radius: 30px; background: #fff; box-shadow: 0 15px 55px rgba(29,29,31,.05); }
.xray-copy h2 { margin-bottom: 18px; }
.xray-copy .section-lede { margin-bottom: 25px; }
.xray-deliverables { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; }
.xray-deliverables > div { display: grid; grid-template-columns: 38px 1fr; gap: 12px; align-items: center; min-height: 76px; padding: 15px 19px; border-bottom: 1px solid var(--line); }
.xray-deliverables > div:last-child { border: 0; }
.xray-deliverables span { color: var(--blue); font: 500 10px "DM Mono", monospace; }
.xray-deliverables p { margin: 0; font-size: 13px; font-weight: 500; line-height: 1.5; }

.about-section { display: grid; grid-template-columns: .78fr 1.22fr; gap: clamp(36px, 7vw, 95px); align-items: center; border-top: 1px solid var(--line); }
.about-photo { position: relative; max-width: 410px; overflow: hidden; border-radius: 26px; background: #e8e8ed; }
.about-photo img { display: block; width: 100%; height: 510px; object-fit: cover; object-position: center 26%; filter: saturate(.82); }
.photo-caption { position: absolute; right: 15px; bottom: 15px; left: 15px; color: #fff; font-size: 8px; text-shadow: 0 1px 8px rgba(0,0,0,.55); }
.about-copy h2 { margin-bottom: 24px; font-size: clamp(34px, 4.2vw, 52px); }
.about-copy > p:not(.eyebrow) { max-width: 600px; color: var(--muted); font-size: 14px; line-height: 1.75; }
.about-copy .text-link { margin-top: 6px; color: var(--blue); }
.closing-section { padding: 100px 0; color: #fff; background: var(--ink); }
.closing-inner { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 10px 30px; }
.closing-inner .eyebrow { grid-column: 1 / -1; color: #a1a1a6; }
.closing-inner h2 { margin: 0; font-size: clamp(52px, 7vw, 84px); }
.closing-inner h2 em { color: #a1a1a6; }
.closing-inner > p:not(.eyebrow) { grid-column: 1; margin: 0; color: #b8b8bd; font-size: 14px; line-height: 1.6; }
.closing-inner .button { grid-column: 2; grid-row: 2 / span 2; min-width: 210px; }
.site-footer { display: flex; min-height: 92px; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px 25px; padding-top: 22px; padding-bottom: 22px; color: var(--muted); }
.site-footer > a:not(.footer-brand) { font-size: 10px; }
.footer-brand { font-size: 16px; }
.site-footer .english-link { color: var(--muted); }

html.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .65s var(--ease), transform .65s var(--ease); }
html.js .reveal.is-visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: .08s; }.delay-2 { transition-delay: .16s; }.delay-3 { transition-delay: .24s; }

@media (max-width: 900px) {
  .hero { min-height: 690px; }
  .hero-copy { max-width: 710px; }
  .hero-orbit { top: 245px; right: -20px; opacity: .7; transform: scale(.78); transform-origin: center right; }
  .sorria-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .xray-card { gap: 30px; }
  .about-section { grid-template-columns: .8fr 1.2fr; gap: 40px; }
}

@media (max-width: 640px) {
  html { scroll-padding-top: 76px; }
  .section-shell { width: min(100% - 40px, 520px); }
  .site-header { height: 66px; }
  .header-inner { gap: 8px; }
  .brand { flex: 0 0 auto; }
  .main-nav { position: absolute; top: 65px; right: 0; left: 0; display: flex; flex-direction: column; gap: 0; margin: 0; padding: 8px 20px 15px; border-bottom: 1px solid var(--line); background: rgba(245,245,247,.98); opacity: 0; pointer-events: none; transform: translateY(-8px); visibility: hidden; transition: opacity .2s ease, transform .2s ease, visibility 0s linear .2s; }
  .main-nav.is-open { opacity: 1; pointer-events: auto; transform: none; visibility: visible; transition: opacity .2s ease, transform .2s ease; }
  .main-nav a { min-height: 48px; display: flex; align-items: center; border-bottom: 1px solid var(--line); font-size: 14px; }
  .main-nav a:last-child { border: 0; }
  .header-actions { flex: 0 0 auto; gap: 2px; }
  .button-small { min-height: 44px; padding: 0 11px; font-size: 10px; gap: 5px; white-space: nowrap; }
  .menu-toggle { display: block; flex: 0 0 44px; }
  .hero { min-height: 705px; align-items: flex-start; overflow-x: clip; padding-top: 142px; padding-bottom: 90px; }
  .hero-copy { width: 100%; max-width: 100%; min-width: 0; }
  .hero .eyebrow { font-size: 9px; }
  h1 { width: 100%; max-width: 560px; margin-bottom: 18px; font-size: clamp(42px, 11.5vw, 55px); line-height: 1.01; overflow-wrap: anywhere; }
  h1 br { display: block; }
  .hero-lede { max-width: 330px; font-size: 15px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 11px; margin-top: 22px; }
  .hero-actions .button { min-height: 48px; }
  .hero-orbit { top: auto; right: -93px; bottom: 10px; opacity: .55; transform: scale(.53); transform-origin: bottom right; }
  .scroll-cue { bottom: 21px; max-width: 225px; font-size: 8px; }
  .method-section, .test-section, .how-section, .xray-section, .about-section { padding-top: 82px; padding-bottom: 82px; }
  .section-heading { margin-bottom: 30px; }
  h2 { font-size: clamp(38px, 10vw, 52px); }
  .section-lede { font-size: 14px; }
  .sorria-grid { grid-template-columns: 1fr; gap: 10px; }
  .sorria-card { min-height: 180px; padding: 21px; }
  .letter { top: 9px; right: 15px; font-size: 82px; }
  .step-label { margin-bottom: 23px; }
  .sorria-card h3 { font-size: 18px; }
  .test-layout { grid-template-columns: 1fr; gap: 14px; }
  .test-callout { position: static; padding: 22px; }
  .test-callout h3 { margin-top: 21px; font-size: 22px; }
  .test-step { grid-template-columns: 35px 1fr; gap: 10px; padding: 18px 16px; }
  .how-grid { grid-template-columns: 1fr; }
  .how-card, .how-budget { grid-column: auto; min-height: 0; padding: 20px; }
  .how-card .step-number { margin-bottom: 17px; }
  .metric-note { align-items: flex-start; flex-direction: column; gap: 7px; padding: 20px; }
  .metric-note .eyebrow { width: auto; }
  .xray-card { grid-template-columns: 1fr; gap: 28px; padding: 25px 20px; border-radius: 23px; }
  .xray-copy h2 { font-size: 46px; }
  .xray-deliverables > div { min-height: 68px; padding: 13px; }
  .about-section { grid-template-columns: 1fr; gap: 30px; }
  .about-photo { width: 100%; max-width: 430px; }
  .about-photo img { height: min(115vw, 480px); }
  .about-copy h2 { font-size: clamp(34px, 9vw, 46px); }
  .closing-section { padding: 76px 0; }
  .closing-inner { grid-template-columns: 1fr; align-items: start; gap: 15px; }
  .closing-inner .eyebrow { grid-column: auto; }
  .closing-inner h2 { font-size: 58px; }
  .closing-inner > p:not(.eyebrow) { grid-column: auto; }
  .closing-inner .button { grid-column: auto; grid-row: auto; width: fit-content; margin-top: 7px; }
  .site-footer { justify-content: flex-start; gap: 16px 22px; padding-top: 24px; padding-bottom: 24px; }
  .site-footer .english-link { flex-basis: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
  html.js .reveal { opacity: 1; transform: none; }
}