:root {
    --ogtr-navy: #022B3A;
    --ogtr-green: #00A676;
    --ogtr-green-dark: #006B50;
    --ogtr-ink: #17333e;
    --ogtr-muted: #5f6f75;
    --ogtr-line: #e3ebeb;
    --ogtr-soft: #f4f8f7;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Inter', system-ui, sans-serif; color: var(--ogtr-navy); background: #fff; }
h1, h2, h3 { font-family: 'Satoshi', system-ui, sans-serif; margin-top: 0; }
a { color: inherit; }
.hidden { display: none !important; }
.flex { display: flex !important; }
.site-container { width: min(1152px, calc(100% - 48px)); margin: 0 auto; }
.content-container { width: min(896px, calc(100% - 48px)); margin: 0 auto; }
.site-nav { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.97); border-bottom: 1px solid #eef1f2; backdrop-filter: blur(8px); }
.nav-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand img { display: block; width: 230px; max-width: 55vw; height: auto; }
.desktop-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 500; }
.desktop-nav a, .footer-links a { text-decoration: none; }
.desktop-nav a:hover, .desktop-nav a:focus-visible, .footer-links a:hover, .footer-links a:focus-visible { color: var(--ogtr-green-dark); }
.primary-nav-cta, .primary-cta { display: inline-flex; align-items: center; justify-content: center; border-radius: 14px; text-decoration: none; font-weight: 600; }
.primary-nav-cta { padding: 11px 18px; color: #fff; background: var(--ogtr-navy); }
.primary-nav-cta:hover, .primary-nav-cta:focus-visible, .primary-cta:hover, .primary-cta:focus-visible { background: #001f2a; }
.mobile-menu-button { display: none; padding: 10px 12px; border: 1px solid #d8e0e3; border-radius: 10px; background: #fff; color: var(--ogtr-navy); font: inherit; font-weight: 600; }
.breadcrumb { padding: 22px 0 0; font-size: 14px; color: var(--ogtr-muted); }
.breadcrumb a { color: var(--ogtr-green-dark); }
.section { padding: 80px 0; }
.section.alt { background: var(--ogtr-soft); }
.section h2 { margin-bottom: 24px; color: var(--ogtr-navy); font-size: 30px; font-weight: 700; line-height: 1.2; letter-spacing: -.025em; }
.section-intro { max-width: 820px; margin: 0 0 32px; color: #35474e; font-size: 18px; font-weight: 400; line-height: 1.7; }
.copy { color: #2e4047; font-size: 18px; font-weight: 500; line-height: 1.7; }
.copy p { margin: 0 0 24px; }
.copy strong { color: var(--ogtr-navy); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.primary-cta { padding: 15px 22px; color: #fff; background: var(--ogtr-navy); }
.secondary-cta { display: inline-flex; align-items: center; justify-content: center; padding: 14px 21px; border: 1px solid #cbd5d9; border-radius: 14px; color: var(--ogtr-navy); text-decoration: none; font-weight: 600; }
.inline-link { color: var(--ogtr-green-dark); font-weight: 600; text-underline-offset: 3px; }
.check-list { list-style: none; margin: 28px 0 0; padding: 0; display: grid; gap: 14px; color: #42565e; line-height: 1.6; }
.check-list li { position: relative; padding-left: 28px; }
.check-list li::before { content: '✓'; position: absolute; left: 0; top: 0; color: var(--ogtr-green-dark); font-weight: 700; }
.cta-panel { padding: 42px; border-radius: 24px; background: var(--ogtr-navy); color: #fff; }
.cta-panel h2 { color: #fff; margin-bottom: 14px; }
.cta-panel p { max-width: 720px; margin: 0 0 28px; color: rgba(255,255,255,.82); font-size: 18px; line-height: 1.625; }
.cta-panel .primary-cta { background: #fff; color: var(--ogtr-navy); }
.cta-panel .primary-cta:hover, .cta-panel .primary-cta:focus-visible { background: #eef3f4; }
.site-footer { padding: 42px 0; background: var(--ogtr-navy); color: rgba(255,255,255,.78); font-size: 14px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 18px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
#cookie-banner { position: fixed; left: 0; right: 0; bottom: 0; z-index: 200; padding: 20px 0; border-top: 1px solid var(--ogtr-line); background: #fff; box-shadow: 0 -8px 30px rgba(2,43,58,.08); }
.cookie-inner { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.cookie-copy { max-width: 700px; color: #56686f; font-size: 14px; line-height: 1.55; }
.cookie-copy a { color: var(--ogtr-green-dark); }
.cookie-actions { display: flex; gap: 10px; }
.cookie-btn { padding: 10px 14px; border-radius: 10px; border: 1px solid #cfd9dd; background: #fff; color: var(--ogtr-navy); font: inherit; font-weight: 600; cursor: pointer; }
.cookie-btn.accept { border-color: var(--ogtr-navy); background: var(--ogtr-navy); color: #fff; }
.cookie-btn:focus-visible, a:focus-visible, button:focus-visible { outline: 3px solid var(--ogtr-green-dark); outline-offset: 3px; }
#mobile-menu { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,.58); }
#mobile-menu.flex { align-items: stretch; }
.mobile-panel { width: min(320px, 86vw); height: 100%; padding: 24px; background: #fff; box-shadow: 12px 0 40px rgba(0,0,0,.16); }
.mobile-top { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 32px; }
.mobile-top img { width: 180px; height: auto; }
#close-mobile-menu { padding: 9px 11px; border: 1px solid #d8e0e3; border-radius: 10px; background: #fff; color: var(--ogtr-navy); font: inherit; font-weight: 600; }
.mobile-links { display: grid; gap: 8px; }
.mobile-links a { padding: 10px 4px; text-decoration: none; font-size: 18px; }
.mobile-cta { margin-top: 24px; }

.ogtr-hero {
    overflow: hidden;
    background: linear-gradient(118deg, #022B3A 0%, #073f4b 64%, #0a4e58 100%);
    color: #fff;
}

.ogtr-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(300px, .92fr);
    gap: 54px;
    align-items: center;
    padding: 72px 0 84px;
}

.ogtr-hero .breadcrumb { padding-top: 22px; color: rgba(255,255,255,.68); }
.ogtr-hero .breadcrumb a { color: #9be2c9; }
.ogtr-hero .eyebrow { color: #9be2c9; }
.ogtr-hero h1 { max-width: 750px; margin-bottom: 24px; font-size: clamp(2.3rem, 5vw, 4.4rem); line-height: 1.06; letter-spacing: -.04em; }
.ogtr-hero .hero-lead { max-width: 720px; color: rgba(255,255,255,.9); font-weight: 400; line-height: 1.68; }
.ogtr-hero .hero-actions { margin-top: 34px; }
.ogtr-hero .primary-cta { background: #fff; color: var(--ogtr-navy); }
.ogtr-hero .primary-cta:hover, .ogtr-hero .primary-cta:focus-visible { background: #eaf6f2; }
.ogtr-hero .secondary-cta { border-color: rgba(255,255,255,.36); color: #fff; }
.ogtr-hero .secondary-cta:hover, .ogtr-hero .secondary-cta:focus-visible { border-color: #9be2c9; color: #c7f2e2; }

.ogtr-hero-media {
    position: relative;
    margin: 0;
    aspect-ratio: 4 / 3;
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 28px;
    background: #073f4b;
    box-shadow: 0 28px 60px rgba(0,0,0,.18);
    overflow: hidden;
}
.ogtr-hero-media picture, .ogtr-hero-media img { display: block; width: 100%; height: 100%; }
.ogtr-hero-media img { object-fit: cover; object-position: center; }

.ogtr-note { margin-top: 30px; padding: 18px 20px; border-left: 4px solid #8ee0c0; background: rgba(255,255,255,.1); color: rgba(255,255,255,.9); font-size: 15px; font-weight: 400; line-height: 1.68; }
.ogtr-note strong { color: #fff; }
.ogtr-service-intro { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: 46px; align-items: start; }
.ogtr-service-intro .section-intro { margin-bottom: 0; }
.ogtr-callout { margin-top: 28px; padding: 24px; border: 1px solid #cfe5dd; border-radius: 18px; background: #f6fbf9; color: #2f4941; font-weight: 400; line-height: 1.72; }
.ogtr-callout h3 { margin: 0 0 9px; color: var(--ogtr-navy); font-size: 20px; line-height: 1.3; }
.ogtr-callout p { margin: 0; }

.interface-model { margin: 36px 0 0; padding: 30px; border: 1px solid var(--ogtr-line); border-radius: 22px; background: #fff; box-shadow: 0 14px 32px rgba(2,43,58,.06); }
.interface-programme { margin-bottom: 18px; padding: 18px 20px; border: 1px solid #bcd8cf; border-radius: 14px; background: #f4f8f7; color: var(--ogtr-navy); font-family: 'Satoshi', system-ui, sans-serif; font-size: 20px; font-weight: 700; line-height: 1.3; text-align: center; }
.interface-workstreams { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px; }
.interface-workstream { min-height: 126px; display: flex; flex-direction: column; justify-content: flex-start; padding: 18px; border: 1px solid #cddbdd; border-top: 4px solid var(--ogtr-green-dark); border-radius: 13px; background: #fff; color: #34474e; }
.interface-workstream strong { margin-bottom: 10px; color: var(--ogtr-navy); font-family: 'Satoshi', system-ui, sans-serif; font-size: 21px; line-height: 1; }
.interface-workstream span { font-size: 14px; line-height: 1.55; }
.interface-divider { display: flex; align-items: center; gap: 12px; margin: 22px 0; color: #607278; font-size: 11px; font-weight: 700; letter-spacing: 1.1px; text-transform: uppercase; }
.interface-divider::before, .interface-divider::after { height: 1px; flex: 1; background: #d9e4e5; content: ''; }
.interface-adviser { display: grid; grid-template-columns: minmax(150px,.42fr) minmax(0,1.58fr); gap: 18px; align-items: center; padding: 21px 23px; border: 1px solid var(--ogtr-navy); border-radius: 14px; background: var(--ogtr-navy); color: #fff; }
.interface-adviser strong { font-family: 'Satoshi', system-ui, sans-serif; font-size: 21px; line-height: 1.2; }
.interface-adviser span { color: rgba(255,255,255,.88); font-size: 15px; line-height: 1.55; }
.interface-model figcaption { margin-top: 18px; color: #52676e; font-size: 14px; line-height: 1.65; }

.ogtr-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; margin-top: 30px; }
.ogtr-card { padding: 28px; border: 1px solid var(--ogtr-line); border-radius: 20px; background: #fff; }
.ogtr-card h3 { margin: 0 0 12px; color: var(--ogtr-navy); font-size: 21px; line-height: 1.35; }
.ogtr-card p { margin: 0; color: #34464d; font-weight: 400; line-height: 1.68; }
.ogtr-card .tag { display: inline-block; margin-bottom: 15px; padding: 6px 9px; border-radius: 999px; background: #eaf7f2; color: var(--ogtr-green-dark); font-size: 11px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; }
.ogtr-card ul { margin: 18px 0 0; padding-left: 19px; color: #34484f; line-height: 1.68; }
.ogtr-card li + li { margin-top: 8px; }

.ogtr-steps { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; margin-top: 30px; }
.ogtr-step { padding: 22px; border-top: 3px solid var(--ogtr-green); background: #fff; box-shadow: 0 1px 0 rgba(2,43,58,.05); }
.ogtr-step .step-number { color: var(--ogtr-green-dark); font-size: 12px; font-weight: 700; letter-spacing: 1.2px; }
.ogtr-step h3 { margin: 9px 0 10px; font-size: 19px; line-height: 1.35; }
.ogtr-step p { margin: 0; color: #34464d; font-size: 15px; line-height: 1.65; }

.insight-feature { display: grid; grid-template-columns: auto minmax(0,1fr); gap: 22px; align-items: start; padding: 30px; border: 1px solid #cfe5dd; border-radius: 22px; background: linear-gradient(135deg, #f6fbf9, #fff); }
.insight-mark { display: flex; width: 48px; height: 48px; align-items: center; justify-content: center; border-radius: 14px; background: var(--ogtr-navy); color: #9be2c9; font-size: 20px; }
.insight-label { margin-bottom: 10px; color: var(--ogtr-green-dark); font-size: 12px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; }
.insight-feature h2 { margin-bottom: 12px; font-size: 26px; line-height: 1.25; }
.insight-feature p { max-width: 760px; margin: 0 0 18px; color: #34464d; line-height: 1.68; }

.ogtr-sources { margin: 22px 0 0; padding-left: 22px; color: #3f555d; }
.ogtr-sources li { margin-bottom: 12px; line-height: 1.55; }
.ogtr-sources a { color: var(--ogtr-green-dark); text-underline-offset: 3px; }

.article-header { padding: 64px 0 62px; background: var(--ogtr-soft); border-bottom: 1px solid var(--ogtr-line); }
.article-header .content-container, .article-layout { width: min(960px, calc(100% - 48px)); }
.article-header h1 { max-width: 960px; margin: 18px 0 20px; font-size: clamp(2.3rem, 5vw, 4.4rem); line-height: 1.08; letter-spacing: -.04em; }
.article-subtitle { max-width: 780px; margin: 0; color: #4b5563; font-size: 20px; line-height: 1.55; }
.article-meta { max-width: 900px; margin-top: 25px; color: #7a898e; font-size: 12.5px; font-weight: 400; line-height: 1.55; }
.article-layout { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 36px; align-items: start; }
.article-copy { max-width: 760px; min-width: 0; color: #344149; font-size: 18.5px; line-height: 1.72; }
.article-copy h2 { margin: 60px 0 22px; color: var(--ogtr-navy); font-size: 32px; line-height: 1.18; letter-spacing: -.018em; }
.article-copy h3 { margin: 42px 0 15px; color: var(--ogtr-navy); font-size: 24px; line-height: 1.28; letter-spacing: -.012em; }
.article-copy p { margin: 0 0 25px; }
.article-copy ul { margin: 0 0 30px; padding-left: 25px; }
.article-copy li + li { margin-top: 8px; }
.article-copy strong { color: var(--ogtr-navy); }
.article-copy a { color: var(--ogtr-green-dark); font-weight: 600; text-underline-offset: 3px; }
.article-lede { color: var(--ogtr-navy); font-size: 20px; font-weight: 500; line-height: 1.65; }
.article-copy blockquote { margin: 38px 0; padding: 22px 26px; border-left: 4px solid var(--ogtr-green); background: #f6fbf9; color: var(--ogtr-navy); font-size: 20px; line-height: 1.6; }
.article-toc { position: sticky; top: 106px; padding: 14px 15px; border: 1px solid var(--ogtr-line); border-radius: 14px; background: #fbfdfd; }
.article-toc strong { display: block; margin-bottom: 9px; color: #5b6d73; font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase; }
.article-toc a { display: block; padding: 4px 0; color: #607278; font-size: 12px; line-height: 1.4; text-decoration: none; }
.article-toc a:hover, .article-toc a:focus-visible { color: var(--ogtr-green-dark); text-decoration: underline; }
.article-table-wrap { max-width: 100%; min-width: 0; margin: 25px 0 28px; overflow-x: auto; border: 1px solid var(--ogtr-line); border-radius: 14px; }
.article-table { width: 100%; min-width: 680px; border-collapse: collapse; background: #fff; font-size: 14px; line-height: 1.55; }
.article-table th { background: var(--ogtr-navy); color: #fff; font-weight: 600; text-align: left; }
.article-table th, .article-table td { padding: 14px 15px; border-bottom: 1px solid var(--ogtr-line); vertical-align: top; }
.article-table tr:last-child td { border-bottom: 0; }
.article-table tr:nth-child(even) td { background: #fbfdfd; }
.article-callout { margin: 34px 0; padding: 24px; border: 1px solid #cfe5dd; border-radius: 18px; background: #f6fbf9; }
.article-callout p:last-child { margin-bottom: 0; }
.article-cta { margin: 42px 0 10px; padding: 28px; border-radius: 20px; background: var(--ogtr-navy); color: #fff; }
.article-cta p { color: rgba(255,255,255,.82); }
.article-cta p:last-of-type { margin-bottom: 20px; }
.article-cta a { display: inline-flex; padding: 12px 17px; border-radius: 11px; background: #fff; color: var(--ogtr-navy); text-decoration: none; }
.footnotes { margin-top: 48px; padding-top: 26px; border-top: 1px solid var(--ogtr-line); font-size: 14px; line-height: 1.6; }
.footnotes h2 { margin-top: 0; font-size: 24px; }
.footnotes li { margin-bottom: 12px; }
.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; }

@media (max-width: 920px) {
    .desktop-nav, .primary-nav-cta { display: none; }
    .mobile-menu-button { display: inline-flex; }
    .ogtr-hero-grid, .ogtr-service-intro, .article-layout { grid-template-columns: 1fr; }
    .ogtr-hero-media { width: min(620px, 100%); }
    .interface-workstreams { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .ogtr-steps { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .article-toc { position: static; order: -1; }
}

@media (max-width: 640px) {
    .site-container, .content-container { width: calc(100% - 30px); }
    .nav-inner { min-height: 76px; }
    .brand img { width: 200px; }
    .ogtr-hero-grid { gap: 32px; padding: 44px 0 60px; }
    .ogtr-hero-media { border-radius: 22px; }
    .ogtr-grid, .ogtr-steps { grid-template-columns: 1fr; }
    .footer-inner, .cookie-inner { align-items: flex-start; flex-direction: column; }
    .cookie-actions { width: 100%; flex-direction: column; }
    .cookie-btn { width: 100%; }
    .interface-model, .insight-feature { padding: 22px; }
    .interface-programme { font-size: 18px; }
    .interface-workstreams { grid-template-columns: 1fr; }
    .interface-workstream { min-height: 0; }
    .interface-divider { text-align: center; }
    .interface-adviser { grid-template-columns: 1fr; gap: 8px; }
    .article-header { padding: 48px 0 50px; }
    .article-subtitle { font-size: 18px; }
    .article-header .content-container, .article-layout { width: calc(100% - 30px); }
    .article-copy { font-size: 18px; line-height: 1.72; }
    .article-copy h2 { margin-top: 48px; font-size: 28px; }
    .article-copy h3 { margin-top: 36px; font-size: 22px; }
}