:root {
  --ink: #111;
  --paper: #fff;
  --muted: #f1f1ef;
  --line: #c8c8c4;
  --soft-ink: #5d5d58;
  --max: 1240px;
  --radius: 2px;
  --shadow: 0 18px 50px rgb(0 0 0 / 12%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}
body:has(dialog[open]) { overflow: hidden; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 900px; margin-bottom: 28px; font-size: clamp(3.2rem, 7vw, 7.4rem); font-weight: 500; line-height: .91; letter-spacing: -.065em; }
h2 { margin-bottom: 24px; font-size: clamp(2.2rem, 4.5vw, 4.4rem); font-weight: 500; line-height: 1; letter-spacing: -.045em; }
h3 { margin-bottom: 16px; font-size: clamp(1.3rem, 2vw, 1.75rem); line-height: 1.15; letter-spacing: -.02em; }

.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.section { padding: clamp(76px, 10vw, 150px) 0; }
.section-muted { background: var(--muted); }
.section-dark { color: #fff; background: var(--ink); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; left: 20px; top: -100px; padding: 12px 16px; color: #fff; background: #111; }
.skip-link:focus { top: 20px; }
.eyebrow { margin-bottom: 24px; color: var(--soft-ink); font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.section-dark .eyebrow { color: #a8a8a3; }
.lead { max-width: 770px; margin-bottom: 36px; font-size: clamp(1.18rem, 2vw, 1.6rem); color: #333; }
.lead-small { max-width: 650px; margin-bottom: 28px; font-size: 1.18rem; color: var(--soft-ink); }
.wire-label { display: inline-block; padding: 7px 10px; border: 1px solid currentColor; font-size: .68rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.data-note { margin-top: 18px; margin-bottom: 0; color: var(--soft-ink); font-size: .78rem; }

.prototype-banner { display: flex; justify-content: center; gap: 16px; padding: 9px 20px; color: #fff; background: #111; font-size: .72rem; letter-spacing: .02em; text-align: center; }
.prototype-banner span { color: #bcbcb6; }

.site-header { position: sticky; z-index: 30; top: 0; border-bottom: 1px solid var(--line); background: rgb(255 255 255 / 94%); backdrop-filter: blur(14px); }
.header-row { display: flex; align-items: center; min-height: 82px; gap: 28px; }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; gap: 12px; color: inherit; font-size: .82rem; font-weight: 800; letter-spacing: .08em; text-decoration: none; }
.brand-mark { display: grid; width: 40px; height: 40px; place-items: center; border: 1px solid currentColor; border-radius: 50%; font-size: .7rem; }
.main-nav { display: flex; align-items: center; justify-content: center; flex: 1; gap: clamp(15px, 2vw, 30px); }
.main-nav a { position: relative; font-size: .83rem; text-decoration: none; }
.main-nav a::after { position: absolute; left: 0; right: 100%; bottom: -8px; height: 1px; background: currentColor; content: ""; transition: right .2s ease; }
.main-nav a:hover::after, .main-nav a:focus-visible::after { right: 0; }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 1px solid var(--line); background: #fff; }
.nav-toggle span:not(.sr-only) { display: block; height: 1px; margin: 5px 0; background: #111; }

.button-row { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; }
.button { display: inline-flex; min-height: 52px; align-items: center; justify-content: center; padding: 13px 22px; border: 1px solid var(--ink); border-radius: var(--radius); cursor: pointer; font-size: .82rem; font-weight: 700; text-decoration: none; transition: color .2s ease, background-color .2s ease, transform .2s ease; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, summary:focus-visible, a:focus-visible { outline: 3px solid #777; outline-offset: 3px; }
.button-dark { color: #fff; background: var(--ink); }
.button-dark:hover { color: var(--ink); background: #fff; }
.button-light { color: var(--ink); background: transparent; }
.button-light:hover { color: #fff; background: var(--ink); }
.button-invert { color: #111; border-color: #fff; background: #fff; }
.text-link { display: inline-flex; gap: 14px; align-items: center; font-weight: 700; text-decoration: none; border-bottom: 1px solid currentColor; }

.hero { padding-top: clamp(85px, 10vw, 145px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(380px, .85fr); gap: 60px; align-items: center; }
.candidate-shortcut { display: inline-flex; gap: 12px; margin-top: 34px; font-weight: 700; text-decoration: none; }
.wire-visual { position: relative; min-height: 520px; overflow: hidden; border: 1px solid var(--ink); background: repeating-linear-gradient(135deg,#fff 0,#fff 16px,#f5f5f3 16px,#f5f5f3 17px); }
.wire-visual > .wire-label { position: absolute; top: 22px; left: 22px; }
.wire-flow { position: absolute; inset: 42% 8% auto; display: flex; align-items: center; justify-content: space-between; }
.wire-flow span { display: grid; width: 90px; height: 90px; place-items: center; border: 1px solid #111; border-radius: 50%; background: #fff; font-size: .72rem; font-weight: 700; }
.wire-flow i { flex: 1; height: 1px; background: #111; }
.wire-card { position: absolute; padding: 18px; border: 1px solid #111; background: #fff; box-shadow: 8px 8px 0 #111; font-size: .76rem; font-weight: 700; }
.wire-card-a { right: 28px; top: 25%; }
.wire-card-b { left: 30px; bottom: 30px; }

.proof-strip { padding: 42px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-grid div { display: flex; min-height: 92px; flex-direction: column; justify-content: space-between; padding: 0 28px; border-left: 1px solid var(--line); }
.proof-grid div:last-child { border-right: 1px solid var(--line); }
.proof-grid strong { font-size: 2.2rem; font-weight: 500; letter-spacing: -.04em; }
.proof-grid span { color: var(--soft-ink); font-size: .78rem; }
.service-proof { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; }
.service-proof span { padding: 18px; border-left: 1px solid var(--line); font-size: .78rem; font-weight: 700; text-align: center; }
.service-proof span:last-child { border-right: 1px solid var(--line); }

.section-heading { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, .6fr); gap: 60px; align-items: end; margin-bottom: 60px; }
.section-heading h2 { max-width: 820px; margin-bottom: 0; }
.section-heading > p { margin-bottom: 4px; color: var(--soft-ink); }
.section-heading-light > p { color: #aaa; }

.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { padding: 30px; border: 1px solid var(--line); background: var(--paper); }
.solution-card { display: flex; min-height: 440px; flex-direction: column; }
.card-number { margin-bottom: 70px; font-size: .72rem; font-weight: 700; }
.solution-card > p { color: var(--soft-ink); }
.clean-list { display: grid; gap: 8px; padding: 0; margin: 22px 0 36px; list-style: none; font-size: .84rem; }
.clean-list li::before { margin-right: 10px; content: "—"; }
.solution-card .text-link { align-self: flex-start; margin-top: auto; }

.chooser-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.choice-list { display: grid; margin-top: 40px; border-top: 1px solid var(--line); }
.choice-list button { padding: 20px 0; border: 0; border-bottom: 1px solid var(--line); color: var(--soft-ink); background: transparent; cursor: pointer; text-align: left; }
.choice-list button[aria-selected="true"] { color: var(--ink); font-weight: 700; }
.choice-list button[aria-selected="true"]::before { margin-right: 12px; content: "●"; font-size: .6rem; }
.choice-result { position: sticky; top: 120px; min-height: 390px; padding: 45px; color: #fff; background: var(--ink); }
.choice-result h3 { margin-top: 90px; font-size: clamp(2rem, 4vw, 3.8rem); }
.choice-result p { max-width: 520px; color: #bcbcb6; }
.choice-result .button { margin-top: 30px; border-color: #fff; }

.staff-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.staff-tile { display: grid; min-height: 220px; grid-template-rows: auto 1fr auto; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-decoration: none; transition: color .2s, background .2s; }
.staff-tile:hover { color: #fff; background: #111; }
.staff-tile span, .staff-tile small { color: var(--soft-ink); }
.staff-tile strong { align-self: center; font-size: 1.35rem; }
.staff-tile:hover span, .staff-tile:hover small { color: #bbb; }

.process-grid { display: grid; grid-template-columns: repeat(6, 1fr); padding: 0; margin: 0; border-top: 1px solid #555; border-left: 1px solid #555; list-style: none; }
.process-grid li { min-height: 250px; padding: 22px; border-right: 1px solid #555; border-bottom: 1px solid #555; }
.process-grid li span { display: block; margin-bottom: 80px; color: #999; font-size: .7rem; }
.process-grid li strong { font-size: 1.15rem; }
.process-grid li p { margin: 12px 0 0; color: #aaa; font-size: .82rem; }
.process-five { grid-template-columns: repeat(5, 1fr); }

.responsibility-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.responsibility-table { border-top: 1px solid var(--line); }
.responsibility-table [role="row"] { display: grid; grid-template-columns: 1.3fr 1fr 1fr; border-bottom: 1px solid var(--line); }
.responsibility-table [role="cell"] { padding: 18px; border-right: 1px solid var(--line); }
.responsibility-table [role="cell"]:first-child { border-left: 1px solid var(--line); }
.responsibility-table span:not(:first-child) { text-align: center; }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card { display: flex; min-height: 430px; flex-direction: column; padding: 30px; border: 1px solid var(--line); background: #fff; }
.case-card h3 { margin-top: 60px; }
.case-card dl { display: grid; gap: 10px; margin: auto 0 28px; }
.case-card dl div { display: flex; justify-content: space-between; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.case-card dt { color: var(--soft-ink); }
.case-card dd { margin: 0; font-weight: 700; }
.case-card .text-link { align-self: flex-start; }

.company-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: center; }
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.team-grid div { display: flex; flex-direction: column; gap: 8px; }
.team-grid small { color: var(--soft-ink); }
.portrait-placeholder { display: grid; min-height: 280px; margin-bottom: 8px; place-items: center; border: 1px solid var(--line); background: repeating-linear-gradient(135deg,#fff 0,#fff 12px,#f1f1ef 12px,#f1f1ef 13px); color: var(--soft-ink); font-size: .75rem; }

.faq-grid { display: grid; grid-template-columns: .65fr 1.35fr; gap: 80px; align-items: start; }
.faq-grid > div:first-child { position: sticky; top: 120px; }
.accordion { border-top: 1px solid var(--line); }
.accordion details { border-bottom: 1px solid var(--line); }
.accordion summary { position: relative; padding: 25px 54px 25px 0; cursor: pointer; font-size: 1.08rem; font-weight: 700; list-style: none; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { position: absolute; right: 5px; content: "+"; font-size: 1.5rem; font-weight: 400; }
.accordion details[open] summary::after { content: "−"; }
.accordion details p { max-width: 720px; padding: 0 50px 24px 0; color: var(--soft-ink); }

.candidate-section { padding: 62px 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.candidate-grid { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.candidate-grid h2 { margin-bottom: 14px; }
.candidate-grid p { margin-bottom: 0; }

.request-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.prototype-form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding: 30px; border: 1px solid var(--line); background: #fff; }
.prototype-form label { display: grid; gap: 8px; color: var(--soft-ink); font-size: .75rem; font-weight: 700; }
.prototype-form input, .prototype-form textarea, .prototype-form select { width: 100%; min-height: 50px; padding: 12px 0; border: 0; border-bottom: 1px solid #888; border-radius: 0; color: #111; background: transparent; }
.prototype-form textarea { resize: vertical; }
.prototype-form label:has(textarea), .prototype-form .consent, .prototype-form .file-field, .prototype-form .button, .form-status { grid-column: 1 / -1; }
.prototype-form .consent { display: flex; align-items: center; gap: 10px; font-weight: 400; }
.prototype-form .consent input { width: 18px; min-height: 18px; }
.prototype-form .button { justify-self: start; }
.prototype-form-dark { border-color: #555; color: #fff; background: #111; }
.prototype-form-dark label { color: #bbb; }
.prototype-form-dark input, .prototype-form-dark textarea { color: #fff; border-color: #777; }
.form-status { margin: 0; padding: 14px; border: 1px solid currentColor; color: #111; background: #eee; }
.contact-placeholder { display: grid; gap: 8px; margin-top: 40px; font-size: .85rem; }

.site-footer { padding: 70px 0 30px; color: #fff; background: #111; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 50px; }
.footer-grid > div { display: flex; flex-direction: column; align-items: flex-start; gap: 11px; }
.footer-grid a { color: #bbb; text-decoration: none; }
.footer-grid span, .footer-grid p { color: #999; }
.brand-footer { color: #fff !important; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 30px; margin-top: 65px; border-top: 1px solid #444; color: #999; font-size: .72rem; }
.footer-bottom a { color: inherit; }

.request-dialog { width: min(600px, calc(100% - 30px)); padding: 40px; border: 1px solid #111; box-shadow: var(--shadow); }
.request-dialog::backdrop { background: rgb(0 0 0 / 62%); backdrop-filter: blur(4px); }
.request-dialog h2 { font-size: clamp(2rem, 5vw, 3.5rem); }
.dialog-close { position: absolute; top: 12px; right: 14px; width: 40px; height: 40px; border: 0; background: transparent; cursor: pointer; font-size: 2rem; }
.request-dialog .prototype-form { padding: 0; border: 0; }

.breadcrumbs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 70px; color: var(--soft-ink); font-size: .74rem; }
.breadcrumbs a { text-decoration: none; }
.service-hero-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 70px; align-items: end; }
.service-hero h1 { font-size: clamp(3.8rem, 8vw, 8.2rem); }
.service-summary { padding: 28px; border: 1px solid var(--ink); }
.service-summary dl { margin: 45px 0 0; }
.service-summary dl div { display: grid; grid-template-columns: .8fr 1.2fr; gap: 20px; padding: 15px 0; border-top: 1px solid var(--line); }
.service-summary dt { color: var(--soft-ink); }
.service-summary dd { margin: 0; font-weight: 700; }
.two-column { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; }
.check-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.check-grid p { min-height: 160px; padding: 26px; margin: 0; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.check-grid p::before { display: block; margin-bottom: 30px; content: "✓"; }
.model-diagram { display: grid; grid-template-columns: 1fr auto 1.2fr auto 1fr; align-items: stretch; }
.model-diagram article { min-height: 330px; padding: 28px; border: 1px solid var(--ink); background: #fff; }
.model-diagram article p { color: var(--soft-ink); }
.model-primary { color: #fff; background: #111 !important; }
.model-primary p { color: #bbb !important; }
.diagram-arrow { display: grid; width: 70px; place-items: center; font-size: 1.6rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-grid .card { min-height: 260px; }
.feature-grid .card > span { display: block; margin-bottom: 70px; font-size: .7rem; }
.feature-grid .card p { color: var(--soft-ink); }
.document-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 80px; }
.document-list { border-top: 1px solid var(--line); }
.document-list div { display: grid; grid-template-columns: 55px 1fr 1fr; gap: 20px; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--line); }
.document-list div > span { display: grid; width: 42px; height: 42px; place-items: center; border: 1px solid var(--line); font-size: .62rem; }
.document-list small { color: var(--soft-ink); }
.case-feature { display: grid; grid-template-columns: 1fr .8fr; gap: 80px; align-items: end; }
.case-feature h2 { margin-top: 50px; }
.case-feature dl { display: grid; grid-template-columns: 1fr 1fr; margin: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.case-feature dl div { min-height: 130px; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.case-feature dt { color: var(--soft-ink); font-size: .75rem; }
.case-feature dd { margin: 20px 0 0; font-size: 2rem; }

@media (max-width: 1050px) {
  .header-cta { display: none; }
  .main-nav { justify-content: flex-end; }
  .hero-grid, .service-hero-grid { grid-template-columns: 1fr; }
  .wire-visual { min-height: 430px; }
  .solution-grid, .case-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .process-five { grid-template-columns: repeat(3, 1fr); }
  .staff-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .company-grid, .responsibility-grid, .request-grid, .faq-grid, .document-grid { gap: 50px; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .model-diagram { grid-template-columns: 1fr; gap: 10px; }
  .diagram-arrow { width: auto; height: 40px; transform: rotate(90deg); }
}

@media (max-width: 780px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .prototype-banner { align-items: center; flex-direction: column; gap: 2px; }
  .header-row { min-height: 68px; }
  .nav-toggle { display: block; margin-left: auto; }
  .main-nav { position: absolute; left: 0; right: 0; top: 100%; display: none; align-items: stretch; flex-direction: column; gap: 0; padding: 14px; border-bottom: 1px solid var(--line); background: #fff; }
  .main-nav[data-open="true"] { display: flex; }
  .main-nav a { padding: 15px; border-bottom: 1px solid var(--line); font-size: 1rem; }
  .main-nav a::after { display: none; }
  .hero { padding-top: 70px; }
  h1 { font-size: clamp(3rem, 14vw, 5rem); }
  .service-hero h1 { font-size: clamp(3rem, 14vw, 5rem); }
  h2 { font-size: clamp(2.15rem, 10vw, 3.3rem); }
  .hero-grid, .section-heading, .chooser-grid, .responsibility-grid, .company-grid, .faq-grid, .request-grid, .two-column, .document-grid, .case-feature { grid-template-columns: 1fr; gap: 42px; }
  .section-heading { margin-bottom: 40px; }
  .proof-grid { grid-template-columns: 1fr 1fr; gap: 28px 0; }
  .proof-grid div:nth-child(odd) { border-left: 1px solid var(--line); }
  .service-proof { grid-template-columns: 1fr 1fr; }
  .solution-grid, .case-grid, .staff-grid, .feature-grid, .check-grid { grid-template-columns: 1fr; }
  .solution-card { min-height: 390px; }
  .choice-result { position: static; min-height: 330px; }
  .process-grid, .process-five { grid-template-columns: 1fr 1fr; }
  .process-grid li { min-height: 210px; }
  .team-grid { grid-template-columns: repeat(3, minmax(220px, 1fr)); overflow-x: auto; }
  .portrait-placeholder { min-height: 250px; }
  .faq-grid > div:first-child { position: static; }
  .candidate-grid { align-items: flex-start; flex-direction: column; }
  .prototype-form { grid-template-columns: 1fr; padding: 22px; }
  .prototype-form label { grid-column: 1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
  .document-list div { grid-template-columns: 52px 1fr; }
  .document-list small { grid-column: 2; }
}

@media (max-width: 500px) {
  .brand > span:last-child { display: none; }
  .wire-visual { min-height: 360px; }
  .wire-flow { inset-inline: 5%; }
  .wire-flow span { width: 72px; height: 72px; }
  .wire-card { padding: 12px; box-shadow: 5px 5px 0 #111; }
  .proof-grid, .service-proof, .process-grid, .process-five, .footer-grid, .case-feature dl { grid-template-columns: 1fr; }
  .proof-grid div { min-height: 80px; border-right: 1px solid var(--line); }
  .service-proof span { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .process-grid li { min-height: 170px; }
  .process-grid li span { margin-bottom: 48px; }
  .request-dialog { padding: 30px 20px 20px; }
}

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