:root{--na-ink:#183153;--na-blue:#286ac4;--na-muted:#64748b;--na-line:#e4eaf2;--na-cloud:#f7f9fc;--na-width:1100px}html{scroll-behavior:smooth}body.na-v3{margin:0;background:#fff;color:var(--na-ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}body.na-v3 *,body.na-v3 *:before,body.na-v3 *:after{box-sizing:border-box}body.na-v3 a{color:inherit;text-decoration:none}body.na-v3 a:focus-visible,body.na-v3 button:focus-visible{outline:3px solid var(--na-blue);outline-offset:4px}.na-container{max-width:var(--na-width);padding:0 30px;margin:auto}.na-site-header{background:#fff;border-bottom:1px solid #edf1f6;position:relative;z-index:5}.na-header-inner{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:24px}.na-logo{display:inline-flex;align-items:center;flex-shrink:0}.na-logo img{width:194px;height:auto;display:block}.na-main-nav{display:flex;align-items:center;gap:38px;font-size:14px;font-weight:500}.na-main-nav a:hover,.na-inline-link:hover,.na-source-copy a:hover{color:var(--na-blue)}.na-main-nav .na-nav-contact{color:var(--na-blue)}.na-menu-toggle{display:none;background:none;border:0;color:var(--na-ink);font:inherit;cursor:pointer}.na-hero{text-align:center;background:#fff}.na-hero-inner{padding-top:118px;padding-bottom:132px}.na-kicker{font-size:12px!important;font-weight:700;letter-spacing:.14em;color:var(--na-blue);line-height:1.5;margin:0 0 25px;text-transform:uppercase}.na-hero h1{font-size:clamp(55px,8vw,98px);line-height:1.05;letter-spacing:-.065em;font-weight:650;margin:0 0 32px;color:var(--na-ink)}.na-hero h1 span{color:var(--na-blue)}.na-hero-lead{font-size:clamp(18px,2.3vw,23px);line-height:1.55;color:#586b83;margin:0 auto 34px;max-width:720px}.na-actions{display:flex;justify-content:center;align-items:center;gap:28px;flex-wrap:wrap}.na-button{display:inline-flex;align-items:center;gap:23px;border-radius:999px;background:var(--na-blue);color:#fff!important;padding:13px 23px;font-size:15px;font-weight:600;transition:background .2s}.na-button:hover{background:#1c529b}.na-inline-link{font-size:15px;color:var(--na-blue)!important;font-weight:600}.na-products{background:var(--na-cloud);padding:105px 0 120px}.na-products h2,.na-close h2{font-size:clamp(38px,5.5vw,62px);line-height:1.15;letter-spacing:-.05em;font-weight:650;margin:0 0 52px}.na-product-list{border-top:1px solid #dbe3ed}.na-product-list>a{display:flex;align-items:center;gap:28px;border-bottom:1px solid #dbe3ed;padding:29px 8px;transition:padding .2s}.na-product-list>a:hover{padding-left:18px}.na-product-icon{display:flex;align-items:center;justify-content:center;width:62px;height:62px;border-radius:17px;background:#e6effc;color:var(--na-blue);font-size:30px;font-weight:500;flex-shrink:0;line-height:1}.na-product-copy{display:flex;flex-direction:column;gap:5px;flex:1}.na-product-copy strong{font-size:25px;letter-spacing:-.025em;font-weight:600;line-height:1.2}.na-product-copy>span{color:#61738a;font-size:15px;max-width:680px}.na-arrow{font-size:24px;color:var(--na-blue);padding:0 10px}.na-source{background:#17395f;color:#fff;padding:115px 0}.na-source-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:95px;align-items:center}.na-source .na-kicker{color:#a8cdf7}.na-source h2{font-size:clamp(38px,4.8vw,57px);line-height:1.18;letter-spacing:-.05em;font-weight:600;margin:0}.na-source h2 span{color:#a8cdf7}.na-source-copy p{font-size:17px;color:#e0eafa;line-height:1.8;margin:0 0 18px}.na-source-copy a{display:inline-block;margin-top:13px;color:#fff;font-weight:600;font-size:15px}.na-close{text-align:center;padding:115px 0 125px}.na-close h2{margin-bottom:18px}.na-close p:not(.na-kicker){color:#65758b;font-size:18px;margin:0 0 30px}.na-footer{background:#f7f9fc;border-top:1px solid #e7edf5;padding:70px 0 25px}.na-footer-main{display:flex;justify-content:space-between;gap:50px;padding-bottom:75px}.na-footer-main img{height:auto;max-width:160px}.na-footer-main p{color:#65758b;font-size:14px;line-height:1.8}.na-footer-links{display:flex;gap:70px}.na-footer-links>div{display:flex;flex-direction:column;gap:10px;font-size:14px}.na-footer-links strong{margin-bottom:7px;color:var(--na-ink)}.na-footer-links a{color:#64748b!important}.na-footer-links a:hover{color:var(--na-blue)!important}.na-footer-bottom{border-top:1px solid #e1e8f1;padding-top:23px;display:flex;justify-content:space-between;gap:20px;color:#748398;font-size:12px}.na-interior-main{padding:75px 0 110px;min-height:55vh}.na-interior-main h1{font-size:clamp(38px,5vw,60px);line-height:1.15;letter-spacing:-.045em;margin:0 0 30px}.na-interior-content{max-width:830px;color:#41536a}.na-interior-content h2,.na-interior-content h3{color:var(--na-ink);line-height:1.25;margin-top:35px}.na-interior-content p,.na-interior-content li{line-height:1.8}.na-interior-content a{color:var(--na-blue)!important;text-decoration:underline!important}.na-interior-content img{max-width:100%;height:auto}.na-interior-content table{display:block;overflow-x:auto}.na-interior-content input,.na-interior-content select,.na-interior-content textarea{max-width:100%}@media(max-width:760px){.na-container{padding:0 22px}.na-header-inner{min-height:75px}.na-logo img{width:158px}.na-menu-toggle{display:block;font-size:14px}.na-main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;padding:22px;border-bottom:1px solid var(--na-line);flex-direction:column;align-items:stretch;gap:18px}.na-main-nav.is-open{display:flex}.na-hero-inner{padding-top:83px;padding-bottom:95px}.na-hero h1{letter-spacing:-.055em}.na-products{padding:75px 0 90px}.na-product-list>a{gap:16px;padding:25px 0}.na-product-icon{width:48px;height:48px;border-radius:13px;font-size:24px}.na-product-copy strong{font-size:21px}.na-product-copy>span{font-size:14px}.na-arrow{padding:0}.na-source{padding:80px 0}.na-source-inner{grid-template-columns:1fr;gap:30px}.na-footer-main{flex-direction:column;gap:30px;padding-bottom:40px}.na-footer-links{gap:30px;justify-content:space-between;flex-wrap:wrap}.na-footer-bottom{flex-direction:column;gap:4px}.na-interior-main{padding:60px 0 85px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.na-button,.na-product-list>a{transition:none}}

/* V4: restrained blue balance; original layout and logo preserved. */
:root{--na-soft-blue:#eaf3ff;--na-blue-wash:#f2f7ff}
.na-hero{background:linear-gradient(180deg,#fff 0%,#fff 42%,var(--na-blue-wash) 100%)}
.na-products{background:#fff}
.na-product-list>a:hover{background:#f5f9ff;border-radius:12px}
.na-source{background:linear-gradient(120deg,#17395f 0%,#1c4d85 100%)}
.na-close{background:linear-gradient(180deg,var(--na-blue-wash),#eaf3ff)}
.na-footer{background:#f7f9fc}
@media(prefers-reduced-motion:reduce){.na-product-list>a:hover{transition:none}}

/* V5: ensure interior headings remain readable against light backgrounds.
   Legacy styles.css declares h1 white for the old dark-header design. */
body.na-v3.na-interior .na-interior-main h1,
body.na-v3.na-interior .na-interior-main h2,
body.na-v3.na-interior .na-interior-main h3,
body.na-v3.na-interior .na-interior-main h4 {
  color: var(--na-ink, #183153);
}

/* V7: hero positioning update; preserve V6 palette, original logo and layout. */
.na-hero-tagline{display:inline-block;color:var(--na-ink);font-size:clamp(19px,2.45vw,25px);font-weight:600;letter-spacing:-.02em;margin-bottom:9px}
.na-hero h1{font-size:clamp(51px,7.5vw,91px)}

/* V8 footer: restores original legal, regulatory, support and phone links without altering the V7 design. */
.na-footer-main{gap:36px}.na-footer-brand{flex:0 0 180px}.na-footer-links{flex:1;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:25px}.na-footer-links>div{min-width:0}.na-footer-links a{line-height:1.5}.na-footer-phone strong{color:var(--na-ink)}.na-footer-phone a{color:var(--na-blue)!important}.na-footer-phone a:hover{text-decoration:underline!important}
@media(max-width:1050px){.na-footer-main{flex-direction:column}.na-footer-brand{flex-basis:auto}.na-footer-links{width:100%}}
@media(max-width:760px){.na-footer-links{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 22px}}
@media(max-width:390px){.na-footer-links{grid-template-columns:1fr}}

/* V10: restrained, three-column footer; original logo and brand palette preserved. */
.na-footer{padding:58px 0 24px}
.na-footer-intro{padding-bottom:30px}
.na-footer-intro img{display:block;max-width:160px;height:auto;margin-bottom:17px}
.na-footer-intro h2{font-size:clamp(19px,2.3vw,25px);line-height:1.25;letter-spacing:-.025em;color:var(--na-ink);font-weight:600;margin:0 0 7px}
.na-footer-intro p{font-size:14px;color:var(--na-muted);margin:0}
.na-footer-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:38px;border-top:1px solid #e1e8f1;padding:29px 0 44px;width:100%}
.na-footer-links>div{display:flex;flex-direction:column;gap:9px;font-size:13px}
.na-footer-links strong{font-size:13px;margin:0 0 3px;color:var(--na-ink)}
.na-footer-links a{color:#64748b!important;line-height:1.5}
.na-footer-bottom{align-items:center;padding-top:21px;gap:15px;font-size:12px}
.na-patent-note{white-space:nowrap}
@media(max-width:760px){.na-footer{padding-top:46px}.na-footer-links{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding-bottom:30px}.na-footer-links>div{gap:10px}.na-footer-bottom{align-items:flex-start;gap:7px}}
@media(max-width:450px){.na-footer-links{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 18px}}

/* V14: smaller header logo, richer restrained homepage palette and infrastructure service. */
.na-logo img{width:175px}
.na-hero{background:linear-gradient(180deg,#e7f1fc 0%,#eaf3ff 72%,#f2f7ff 100%)}
.na-products{background:#fff}
.na-products-subtitle{color:#286ac4;font-size:.68em;letter-spacing:-.035em}
.na-products-behind{font-size:.72em;letter-spacing:-.035em}
.na-product-icon{background:#dcebfA}
.na-source{background:#183153}
.na-close{background:#dcebfa}
@media(max-width:760px){.na-logo img{width:143px}.na-products-subtitle{font-size:.64em}.na-products-behind{font-size:.68em}}

/* V16: explicit high-contrast heading on the navy infrastructure section. */
body.na-v3 .na-source h2 { color: #ffffff; }
body.na-v3 .na-source h2 span { color: #dcebfA; }

/* V17: four-column footer with linked Resources heading and responsive layout. */
.na-footer-links{grid-template-columns:repeat(4,minmax(0,1fr));gap:26px}
.na-footer-links strong .na-footer-heading-link{color:var(--na-ink)!important;font-weight:700}
.na-footer-links strong .na-footer-heading-link:hover,.na-footer-links strong .na-footer-heading-link:focus-visible{color:var(--na-blue)!important;text-decoration:underline;text-underline-offset:3px}
@media(max-width:760px){.na-footer-links{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 22px}}
@media(max-width:390px){.na-footer-links{grid-template-columns:1fr}}