:root {
  --page: #f4f2ed;
  --surface: #ffffff;
  --surface-subtle: #ebe9e3;
  --ink: #111c2b;
  --text: #293747;
  --muted: #657181;
  --quiet: #8a929c;
  --line: #d4d6d7;
  --line-strong: #b7bcc1;
  --navy: #183a5d;
  --navy-hover: #224d76;
  --button-text: #ffffff;
  --header: rgba(244, 242, 237, .94);
  --success: #276548;
  --error: #a63c3c;
  --shadow: 0 20px 50px rgba(17, 28, 43, .08);
  --font: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --shell: 1180px;
}

:root[data-theme="dark"] {
  --page: #0c141e;
  --surface: #111d29;
  --surface-subtle: #172431;
  --ink: #f1f0ec;
  --text: #d5d9dc;
  --muted: #9ba6b1;
  --quiet: #778491;
  --line: #293745;
  --line-strong: #41505f;
  --navy: #e9ecef;
  --navy-hover: #ffffff;
  --button-text: #101b28;
  --header: rgba(12, 20, 30, .94);
  --success: #82c49f;
  --error: #ed9898;
  --shadow: 0 22px 60px rgba(0, 0, 0, .25);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--page); color: var(--text); font-family: var(--font); font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; transition: background .2s ease, color .2s ease; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { color: inherit; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; }
.shell { width: min(calc(100% - 48px), var(--shell)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 200; top: 10px; left: 10px; transform: translateY(-150%); padding: 9px 14px; background: var(--ink); color: var(--page); font-weight: 600; }
.skip-link:focus { transform: translateY(0); }

/* Header */
.site-header { position: sticky; z-index: 100; top: 0; background: var(--header); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { flex: 0 0 auto; display: inline-flex; }
.brand-logo { width: 164px; }
.logo-dark { display: none; }
[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark { display: block; }
.header-right { display: flex; align-items: center; gap: 28px; }
.nav { display: flex; align-items: center; gap: 30px; }
.nav a { position: relative; color: var(--muted); font-size: 14px; font-weight: 500; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"]::after { content: ""; position: absolute; right: 0; bottom: -27px; left: 0; height: 2px; background: var(--ink); }
.theme-toggle { display: inline-flex; align-items: center; gap: 8px; padding: 8px 0; border: 0; background: none; color: var(--muted); cursor: pointer; font-size: 13px; }
.theme-toggle:hover { color: var(--ink); }
.theme-toggle svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.sun-icon { display: none; }
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
.menu-toggle { display: none; border: 0; background: none; padding: 8px 0; font-size: 14px; font-weight: 500; cursor: pointer; }

/* Shared type and controls */
.eyebrow { margin: 0 0 18px; color: var(--muted); font-size: 12px; font-weight: 600; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3 { color: var(--ink); font-weight: 500; letter-spacing: -.035em; }
h1 { margin: 0; font-size: clamp(2.75rem, 6vw, 5.35rem); line-height: 1.02; }
h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.65rem); line-height: 1.08; }
h3 { margin: 0; font-size: 1.25rem; line-height: 1.3; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 14px; padding: 0 21px; border: 1px solid var(--navy); border-radius: 3px; font-size: 14px; font-weight: 600; transition: background .18s ease, color .18s ease, border-color .18s ease; }
.button-primary { background: var(--navy); color: var(--button-text); }
.button-primary:hover { background: var(--navy-hover); border-color: var(--navy-hover); }
.button-secondary { border-color: var(--line-strong); color: var(--ink); }
.button-secondary:hover { background: var(--surface); border-color: var(--ink); }
.button[disabled] { opacity: .55; cursor: wait; }
.arrow-link { display: inline-flex; align-items: center; gap: 11px; padding-bottom: 3px; border-bottom: 1px solid var(--line-strong); color: var(--ink); font-size: 14px; font-weight: 600; }
.arrow-link:hover { border-color: var(--ink); }

/* Home */
.home-hero { padding: clamp(82px, 10vw, 136px) 0 clamp(74px, 9vw, 116px); border-bottom: 1px solid var(--line); }
.home-hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(340px, .72fr); gap: clamp(70px, 10vw, 140px); align-items: end; }
.home-hero h1 { max-width: 12ch; }
.home-hero-copy > p:not(.eyebrow) { max-width: 650px; margin: 30px 0 36px; color: var(--muted); font-size: clamp(1.06rem, 1.5vw, 1.22rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.scope-panel { border-top: 3px solid var(--ink); background: var(--surface); box-shadow: var(--shadow); }
.scope-panel > p { margin: 0; padding: 19px 23px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.scope-panel ol { margin: 0; padding: 0; list-style: none; }
.scope-panel li { display: grid; grid-template-columns: 38px 1fr; gap: 12px; padding: 17px 23px; border-bottom: 1px solid var(--line); color: var(--ink); font-size: 15px; }
.scope-panel li:last-child { border-bottom: 0; }
.scope-panel li span { color: var(--quiet); font-size: 11px; letter-spacing: .1em; }

.intro-band { padding: 42px 0; border-bottom: 1px solid var(--line); }
.intro-band-inner { display: grid; grid-template-columns: 1fr 2fr auto; gap: 44px; align-items: center; }
.intro-band .eyebrow { margin: 0; }
.intro-band p:not(.eyebrow) { max-width: 730px; margin: 0; color: var(--ink); font-size: clamp(1.08rem, 1.7vw, 1.32rem); }

.section { padding: clamp(80px, 10vw, 132px) 0; border-bottom: 1px solid var(--line); }
.section-head { display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(60px, 10vw, 130px); margin-bottom: clamp(52px, 7vw, 82px); }
.section-head .eyebrow { margin: 6px 0 0; }
.section-head-content > p { max-width: 660px; margin: 24px 0 0; color: var(--muted); font-size: 17px; }

.service-list { border-top: 1px solid var(--line-strong); }
.service-list a { display: grid; grid-template-columns: 72px minmax(230px, .8fr) 1.2fr 22px; gap: 30px; align-items: start; padding: 30px 0 33px; border-bottom: 1px solid var(--line); transition: padding .18s ease; }
.service-list a:hover { padding-right: 10px; padding-left: 10px; background: var(--surface); }
.service-list .number { color: var(--quiet); font-size: 12px; letter-spacing: .11em; }
.service-list h3 { font-size: clamp(1.25rem, 2vw, 1.65rem); }
.service-list p { max-width: 570px; margin: 0; color: var(--muted); }
.service-list .arrow { color: var(--quiet); text-align: right; }

.method { background: var(--surface); }
.method-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(70px, 11vw, 150px); }
.method-intro h2 { max-width: 10ch; }
.method-intro > p:not(.eyebrow) { max-width: 460px; margin: 28px 0 34px; color: var(--muted); }
.method-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line-strong); }
.method-list li { display: grid; grid-template-columns: 46px 1fr; gap: 24px; padding: 27px 0 29px; border-bottom: 1px solid var(--line); }
.method-list > li > span { color: var(--quiet); font-size: 11px; letter-spacing: .1em; }
.method-list h3 { margin-bottom: 7px; font-size: 1.1rem; }
.method-list p { margin: 0; color: var(--muted); font-size: 15px; }

.sector-line { display: flex; flex-wrap: wrap; gap: 0; margin-top: 48px; padding: 0; border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); list-style: none; }
.sector-line li { flex: 1 1 220px; padding: 18px 20px; border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); color: var(--ink); font-size: 14px; }

.cta-section { padding: clamp(72px, 9vw, 110px) 0; }
.cta-inner { display: grid; grid-template-columns: 1fr auto; gap: 60px; align-items: end; }
.cta-inner h2 { max-width: 18ch; }
.cta-inner p { max-width: 620px; margin: 22px 0 0; color: var(--muted); font-size: 17px; }

/* Interior pages */
.page-hero { padding: clamp(76px, 9vw, 118px) 0 clamp(62px, 8vw, 94px); border-bottom: 1px solid var(--line); }
.page-hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(60px, 10vw, 130px); align-items: end; }
.page-hero h1 { max-width: 11ch; font-size: clamp(2.7rem, 5.5vw, 4.8rem); }
.page-hero-summary { padding-top: 22px; border-top: 1px solid var(--line-strong); }
.page-hero-summary p { margin: 0; color: var(--muted); font-size: 18px; }

.service-detail { display: grid; grid-template-columns: 110px minmax(230px, .75fr) 1.25fr; gap: clamp(30px, 6vw, 80px); padding: clamp(58px, 8vw, 92px) 0; border-bottom: 1px solid var(--line); }
.service-detail:last-child { border-bottom: 0; }
.detail-number { color: var(--quiet); font-size: 12px; letter-spacing: .11em; }
.service-detail h2 { font-size: clamp(1.75rem, 3vw, 2.7rem); }
.detail-copy > p { max-width: 700px; margin: 0 0 32px; color: var(--muted); font-size: 17px; }
.detail-scope { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line-strong); }
.detail-scope span { padding: 13px 0; border-bottom: 1px solid var(--line); color: var(--ink); font-size: 14px; }
.detail-scope span:nth-child(odd) { padding-right: 20px; }

.engagement-strip { background: var(--surface); }
.engagement-options { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.engagement-options article { padding: 28px; border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.engagement-options h3 { margin-bottom: 11px; }
.engagement-options p { margin: 0; color: var(--muted); font-size: 14px; }

.company-lead { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(70px, 11vw, 150px); }
.company-lead h2 { max-width: 9ch; }
.company-body > p:first-child { margin-top: 0; color: var(--ink); font-size: clamp(1.35rem, 2.3vw, 1.8rem); line-height: 1.5; }
.company-body p { max-width: 720px; color: var(--muted); }
.principle-list { margin-top: 58px; border-top: 1px solid var(--line-strong); }
.principle-list article { display: grid; grid-template-columns: 52px .65fr 1.35fr; gap: 28px; padding: 25px 0 27px; border-bottom: 1px solid var(--line); }
.principle-list article > span { color: var(--quiet); font-size: 11px; letter-spacing: .1em; }
.principle-list p { margin: 0; color: var(--muted); font-size: 14px; }
.company-facts { background: var(--surface); }
.fact-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.fact-grid div { padding: 24px; border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.fact-grid dt { margin-bottom: 13px; color: var(--quiet); font-size: 10px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.fact-grid dd { margin: 0; color: var(--ink); }

/* Contact */
.contact-page { padding: clamp(72px, 9vw, 116px) 0; }
.contact-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(70px, 11vw, 150px); align-items: start; }
.contact-aside h1 { max-width: 9ch; font-size: clamp(2.7rem, 5.5vw, 4.8rem); }
.contact-aside > p:not(.eyebrow) { max-width: 430px; margin: 28px 0 42px; color: var(--muted); font-size: 17px; }
.direct-contact { border-top: 1px solid var(--line-strong); }
.direct-contact a { display: grid; grid-template-columns: 86px 1fr auto; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); color: var(--ink); font-size: 14px; overflow-wrap: anywhere; }
.direct-contact a span { color: var(--quiet); font-size: 10px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.contact-form { padding: clamp(28px, 5vw, 52px); background: var(--surface); border-top: 3px solid var(--ink); box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.field { display: flex; flex-direction: column; margin-bottom: 22px; }
.field label { margin-bottom: 8px; color: var(--ink); font-size: 12px; font-weight: 600; }
.field label > span { color: var(--quiet); }
.field label small { float: right; color: var(--quiet); font-size: 10px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; }
.field input, .field select, .field textarea { width: 100%; padding: 13px 14px; border: 1px solid var(--line-strong); border-radius: 2px; background: var(--page); color: var(--ink); font-size: 15px; appearance: none; -webkit-appearance: none; }
.field select { background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 18px) 21px, calc(100% - 12px) 21px; background-size: 6px 6px, 6px 6px; background-repeat: no-repeat; padding-right: 40px; }
.field textarea { min-height: 158px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: var(--quiet); }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--ink); outline: 0; }
.field.invalid input, .field.invalid textarea { border-color: var(--error); }
.field-error { margin: 6px 0 0; color: var(--error); font-size: 12px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-footer { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; }
.form-footer p { margin: 0; color: var(--quiet); font-size: 12px; }
.form-status { min-height: 1.2em; margin: 16px 0 0; font-size: 13px; }
.form-status.ok { color: var(--success); }
.form-status.err { color: var(--error); }

/* Footer and 404 */
.site-footer { padding: 62px 0 24px; background: var(--surface); }
.footer-main { display: grid; grid-template-columns: 1fr auto; gap: 80px; padding-bottom: 58px; }
.footer-logo { width: 160px; }
.footer-identity p { margin: 22px 0 0; color: var(--muted); font-size: 14px; }
.footer-nav { display: grid; grid-template-columns: repeat(2, 120px); gap: 40px; }
.footer-nav div { display: flex; flex-direction: column; align-items: flex-start; }
.footer-nav span { margin-bottom: 14px; color: var(--quiet); font-size: 10px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.footer-nav a { margin-bottom: 8px; color: var(--muted); font-size: 14px; }
.footer-nav a:hover { color: var(--ink); }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 22px; border-top: 1px solid var(--line); }
.footer-bottom p { margin: 0; color: var(--quiet); font-size: 11px; }
.not-found { min-height: 100vh; display: grid; place-items: center; padding: 40px 24px; }
.not-found-inner { width: min(100%, 670px); padding: clamp(34px, 7vw, 70px); background: var(--surface); border-top: 3px solid var(--ink); box-shadow: var(--shadow); }
.not-found-inner .eyebrow { margin-top: 65px; }
.not-found-inner h1 { margin-bottom: 22px; font-size: clamp(2.5rem, 7vw, 4.4rem); }
.not-found-inner > p:not(.eyebrow) { max-width: 520px; margin: 0 0 32px; color: var(--muted); }

@media (max-width: 940px) {
  .nav { display: none; }
  .menu-toggle { display: block; }
  .header-right { gap: 20px; }
  .nav.is-open { position: absolute; display: flex; top: 76px; right: 0; left: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 12px 24px 20px; background: var(--page); border-bottom: 1px solid var(--line); }
  .nav.is-open a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav a[aria-current="page"]::after { display: none; }
  .home-hero-grid, .page-hero-grid, .section-head, .method-grid, .company-lead, .contact-grid { grid-template-columns: 1fr; gap: 54px; }
  .home-hero-copy { max-width: 780px; }
  .scope-panel { width: min(100%, 630px); }
  .intro-band-inner { grid-template-columns: 1fr; gap: 20px; }
  .service-detail { grid-template-columns: 60px 1fr; }
  .service-detail .detail-copy { grid-column: 2; }
  .fact-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 700px) {
  .shell { width: min(calc(100% - 32px), var(--shell)); }
  .header-inner { min-height: 68px; }
  .brand-logo { width: 138px; }
  .nav.is-open { top: 68px; padding-inline: 16px; }
  .theme-toggle span { display: none; }
  h1 { font-size: clamp(2.55rem, 13vw, 4rem); }
  .home-hero { padding-top: 70px; }
  .service-list a { grid-template-columns: 42px 1fr 18px; gap: 14px; }
  .service-list p { grid-column: 2 / 4; }
  .engagement-options { grid-template-columns: 1fr; }
  .principle-list article { grid-template-columns: 40px 1fr; }
  .principle-list article p { grid-column: 2; }
  .fact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .footer-main { grid-template-columns: 1fr; gap: 48px; }
  .footer-nav { width: 100%; grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 500px) {
  .button { width: 100%; }
  .hero-actions { flex-direction: column; }
  .service-detail { grid-template-columns: 1fr; gap: 20px; }
  .service-detail .detail-copy { grid-column: 1; }
  .detail-scope { grid-template-columns: 1fr; }
  .detail-scope span:nth-child(odd) { padding-right: 0; }
  .cta-inner { grid-template-columns: 1fr; gap: 32px; }
  .direct-contact a { grid-template-columns: 74px 1fr auto; gap: 8px; font-size: 13px; }
}

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