:root{--navy:#152f4b;--blue:#235f8d;--accent:#b33443;--text:#27394b;--muted:#5d7486;--line:#dce6ed;--paper:#f5f8fa;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:#fff}img,picture{max-width:100%}a{color:var(--blue)}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.wrap{width:min(var(--max),calc(100% - 44px));margin:auto}
.top{background:#fff;border-bottom:1px solid var(--line)}.top-inner{display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:78px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:var(--navy);font-size:20px;font-weight:850;letter-spacing:-.5px;line-height:1.12}.brand small{display:block;color:var(--muted);font-size:10px;font-weight:800;letter-spacing:2px;margin-top:5px}.brand-icon{display:grid;place-items:center;width:43px;height:43px;flex:none}.brand-icon img{display:block;width:40px;height:40px}.desktop-nav{display:flex;gap:20px}.desktop-nav a{color:var(--navy);text-decoration:none;font-weight:700;font-size:14px}.desktop-nav a:hover{color:var(--blue)}.menu-toggle{border:0;background:transparent;padding:12px;cursor:pointer;display:none}.menu-toggle span{display:block;width:25px;height:2px;background:var(--navy);margin:5px}
.shade{position:fixed;inset:0;background:#10233b99;z-index:20}.shade[hidden]{display:none}.drawer{visibility:hidden;position:fixed;top:0;right:0;bottom:0;z-index:21;width:min(370px,90vw);overflow:auto;background:#fff;box-shadow:-15px 0 35px #10243c30;transform:translateX(105%);transition:transform .24s ease;padding:20px 24px 35vh}.drawer.open{visibility:visible;transform:translateX(0)}.drawer-head{display:flex;align-items:center;justify-content:space-between}.drawer a{display:block;padding:13px 11px;border-bottom:1px solid var(--line);border-radius:7px;text-decoration:none;font-size:21px;color:var(--navy);font-weight:750}.drawer a:hover,.drawer a:focus-visible{background:#edf5fa;color:#165789}.menu-close{font-size:35px;color:var(--navy);border:0;background:transparent;cursor:pointer}.menu-open{overflow:hidden}
.hero{position:relative;background:linear-gradient(110deg,#122f4d,#37627c);background-size:cover;background-position:center;min-height:360px;display:flex;align-items:center;color:white}.hero-content{padding:68px 0 76px}.eyebrow,.overline{font-size:12px;font-weight:850;letter-spacing:1.8px;text-transform:uppercase;color:#4282aa}.hero .eyebrow{color:#b8d8e8}.hero h1{font-size:clamp(33px,5vw,54px);line-height:1.12;letter-spacing:-1.4px;margin:12px 0 18px;max-width:750px}.hero p:not(.eyebrow){max-width:670px;font-size:18px;color:#e7f2fb}
.home-main{padding:42px 0 75px}.intro{max-width:950px;margin-bottom:32px}.intro h2,.section-head h2{font-size:clamp(24px,2.5vw,34px);line-height:1.23;color:var(--navy);letter-spacing:-.5px;margin:7px 0 12px}.intro p{color:#4d6478}.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:0 0 58px;align-items:stretch}.feature{min-width:0;display:flex;flex-direction:column;padding:0 23px 24px;overflow:hidden;border-radius:12px;background:#173c5d;color:#fff;text-decoration:none;transition:transform .15s,box-shadow .15s}.feature:nth-child(2){background:#1d4b6e}.feature:nth-child(3){background:#2d607b}.feature:hover{transform:translateY(-3px);box-shadow:0 12px 24px #17324c25}.feature-photo{display:block;width:calc(100% + 46px);max-width:none;margin:0 -23px 17px;aspect-ratio:480/207;object-fit:cover}.feature span{font-size:11px;letter-spacing:1.4px;color:#bdd9ea;font-weight:800}.feature h2{font-size:clamp(20px,2vw,24px);line-height:1.22;margin:13px 0 8px;overflow-wrap:break-word}.feature p{margin:4px 0 20px;color:#e4eef5;font-size:15px}.feature b{margin-top:auto;font-size:14px}
.catalogue{margin:44px 0}.section-head{border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:19px;display:flex;justify-content:space-between;align-items:end;gap:18px}.section-head h2{margin:0}.section-head span{color:var(--muted);font-size:13px;white-space:nowrap}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.guide-card{min-width:0;display:flex;flex-direction:column;text-decoration:none;color:inherit;border:1px solid var(--line);border-radius:11px;background:#fff;padding:21px;transition:transform .15s,border-color .15s,box-shadow .15s}.guide-card:hover{transform:translateY(-3px);border-color:#93bad6;box-shadow:0 8px 22px #12345215}.card-tag{font-size:11px;letter-spacing:1px;text-transform:uppercase;color:#4082ad;font-weight:850}.guide-card h3{font-size:17px;line-height:1.36;margin:9px 0;overflow-wrap:break-word;color:var(--navy)}.guide-card p{font-size:14px;line-height:1.55;margin:0 0 15px;color:var(--muted)}.guide-card .read{font-size:13px;font-weight:800;color:var(--blue);margin-top:auto}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:43px;padding:35px 0 80px}.article,.article-layout>*{min-width:0}.crumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:2px 0 34px;color:var(--muted);font-size:13px}.article h1{color:var(--navy);font-size:clamp(32px,4vw,45px);line-height:1.17;letter-spacing:-1px;margin:8px 0 15px;overflow-wrap:break-word}.article .lead{font-size:20px;line-height:1.52;color:#536e82;margin:0 0 29px}.article h2{font-size:26px;line-height:1.3;color:var(--navy);margin:32px 0 10px}.article p{line-height:1.75}.guide-photo{max-width:100%;margin:20px 0 28px;border:1px solid var(--line);border-radius:11px;overflow:hidden;background:var(--paper)}.guide-photo img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}.guide-photo figcaption{padding:11px 15px;font-size:13px;color:var(--muted)}.safety{background:#fff1eb;border-left:4px solid #bf5d38;padding:17px 22px;margin:30px 0}.safety p{margin:5px 0}.related{margin-top:35px}.related .cards{grid-template-columns:repeat(2,minmax(0,1fr))}.sidebar{padding-top:55px}.side-box{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:22px}.side-box strong{color:var(--navy);font-size:17px}.side-box p{font-size:14px;color:var(--muted)}
.standard-page{max-width:800px;padding:36px 0 90px}.standard-page h1{font-size:clamp(31px,4vw,44px);line-height:1.2;color:var(--navy)}.standard-page p{line-height:1.8}.button{border:0;border-radius:7px;background:var(--blue);color:white;text-decoration:none;font:inherit;font-weight:750;padding:11px 18px;cursor:pointer;display:inline-block}.button:hover{background:var(--navy)}.form-stack{display:grid;gap:16px;margin:27px 0}.form-stack label{font-weight:750}.form-stack input,.form-stack textarea{width:100%;font:inherit;border:1px solid #a7b9c7;border-radius:6px;padding:12px;margin-top:5px}.form-stack .hp{position:absolute;left:-9999px}.alert{padding:15px;border:1px solid #b9dabd;background:#eff8ef;border-radius:7px}.alert.error{border-color:#e1b2a6;background:#fff0ed}.callout{border-left:4px solid var(--blue);background:#edf5fa;padding:16px 20px}
.footer{background:#102c4e;color:#e6eef5;padding:48px 0 23px}.footer-grid{display:grid;grid-template-columns:2fr 1fr;gap:45px}.footer-grid strong{color:white}.footer-grid p{color:#bdd0dd;font-size:14px;max-width:600px}.footer-grid a{display:block;color:#dceaf5;text-decoration:none;margin:8px 0;font-size:14px}.copyright{margin-top:28px;border-top:1px solid #ffffff27;padding-top:15px;color:#afc5d4;font-size:12px}
@media(max-width:1050px){.desktop-nav{display:none}.menu-toggle{display:block}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:780px){.feature-grid{grid-template-columns:1fr;gap:15px}.feature-photo{max-height:250px}.article-layout{grid-template-columns:1fr;gap:25px}.sidebar{padding:0}.footer-grid{gap:20px}.hero{min-height:300px}}
@media(max-width:600px){.wrap{width:calc(100% - 30px)}.brand{font-size:16px}.brand-icon{width:41px;height:34px}.hero h1{font-size:36px}.hero p:not(.eyebrow){font-size:16px}.cards,.related .cards,.footer-grid{grid-template-columns:1fr}.section-head{flex-wrap:wrap;align-items:start}.section-head span{white-space:normal}.guide-card{padding:19px}.article h1{font-size:33px}.article .lead{font-size:18px}.article h2{font-size:24px}.article-layout{padding-bottom:50px}.footer{padding-top:36px}}
@media(hover:none){.feature:hover,.guide-card:hover{transform:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.feature,.guide-card,.drawer{transition:none}}
.hero{overflow:hidden}.hero-picture,.hero-photo{position:absolute;inset:0;width:100%;height:100%}.hero-picture{display:block}.hero-photo{object-fit:cover;object-position:center}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(12,36,58,.91),rgba(12,36,58,.42));z-index:1}.hero-content{position:relative;z-index:2}
.intro{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(0,1fr);max-width:none;gap:30px;align-items:center}.owner-tease{padding:22px;background:#eef5fa;border-left:4px solid var(--blue);border-radius:10px}.owner-tease p{font-size:15px}.owner-tease a{font-weight:800;text-decoration:none}
.catalogue{scroll-margin-top:20px}.section-head .overline{margin:0 0 3px}.section-head h2{margin:0}.source-note{margin-top:48px;padding:30px;border-radius:12px;background:var(--paper)}.source-note h2{color:var(--navy);margin-top:0}
.article .byline{margin:-12px 0 26px;color:var(--muted);font-size:13px}.reference-panel{border:1px solid var(--line);border-radius:11px;background:#f8fafc;padding:23px;margin:26px 0;min-width:0}.reference-panel h2{margin-top:0}.maintenance-table-wrap{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}.maintenance-table{width:100%;border-collapse:collapse;min-width:410px;font-size:14px}.maintenance-table th,.maintenance-table td{padding:12px 14px;vertical-align:top;text-align:left;border-bottom:1px solid var(--line)}.maintenance-table th{background:#e8f0f6;color:var(--navy)}.maintenance-table td{background:#fff}.reference-list{padding-left:22px}.reference-list li{margin-bottom:9px}.disclaimer-inline{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:17px}.side-box{margin-bottom:18px}.side-box a:not(.side-link){display:flex;justify-content:space-between;gap:10px;border-bottom:1px solid var(--line);padding:9px 0;text-decoration:none;font-weight:750;font-size:14px}.side-box a span{flex:none}.side-link{font-weight:800}
.footer-grid{grid-template-columns:2fr 1fr 1fr}.drawer a{padding-left:11px;padding-right:11px}.drawer.open{visibility:visible}.drawer:not(.open){visibility:hidden}.drawer a:hover,.drawer a:focus-visible{background:#edf5fa;color:#165789}.feature-photo{max-height:none}.feature{min-width:0}.cards{grid-template-columns:repeat(3,minmax(0,1fr))}.guide-card{min-width:0}.article-layout>*{min-width:0}
@media(max-width:1050px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:780px){.intro{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.article-layout{grid-template-columns:1fr}.sidebar{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.side-box{margin-bottom:0}}
@media(max-width:600px){.cards,.related .cards,.footer-grid,.sidebar{grid-template-columns:1fr}.reference-panel{padding:15px}.feature-grid{grid-template-columns:1fr}.hero-photo{object-position:center}.drawer{padding-bottom:35vh}}
@media(hover:none){.feature:hover,.guide-card:hover{transform:none}}

/* Featured guide refinements */
.feature h2{font-size:clamp(19px,1.8vw,22px)}.feature p{line-height:1.6}.article .guide-photo figcaption{line-height:1.5}
@media(max-width:600px){.hero-content{padding-top:53px;padding-bottom:57px}}
/* V1.2: better technical table scanning on small screens */
.reference-panel .maintenance-table th:first-child,
.reference-panel .maintenance-table td:first-child {white-space:nowrap;font-variant-numeric:tabular-nums;font-weight:650}
.reference-panel .maintenance-table tbody tr:nth-child(even){background:rgba(65,104,125,.055)}
.reference-panel .maintenance-table td {vertical-align:top}
.reference-panel .maintenance-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* V1.5: focus visibility, long titles and narrow-screen safety */
:where(a,button,input,textarea):focus-visible{outline:3px solid #da7a32;outline-offset:3px}
.article,.article h1,.guide-card,.feature{overflow-wrap:anywhere}
.article-layout,.feature-grid,.catalogue,.cards{min-width:0}
.reference-panel .maintenance-table-wrap{max-width:100%;overflow-x:auto}
@media(max-width:480px){.feature{padding-left:18px;padding-right:18px}.feature-photo{width:calc(100% + 36px);margin-left:-18px;margin-right:-18px}.reference-panel .maintenance-table{min-width:400px}.article h1{font-size:clamp(29px,8vw,34px)}}

/* V1.6: readable compact navigation and a personal About page */
.desktop-nav{gap:clamp(10px,1.35vw,19px);align-items:center;white-space:nowrap}.desktop-nav a{font-size:13.5px;line-height:1.3}
.top-inner{gap:14px}.brand{font-size:clamp(16px,1.65vw,20px)}
.about-page{max-width:880px}.about-page .crumb{margin-bottom:24px}.about-page h1{margin:0 0 22px}.about-hero{margin:0 0 26px;border:1px solid var(--line);border-radius:13px;overflow:hidden;background:var(--paper)}.about-hero picture,.about-hero img{display:block;width:100%}.about-hero img{height:auto;aspect-ratio:1600/546;object-fit:cover}.about-hero figcaption{padding:10px 15px;font-size:12px;color:var(--muted);line-height:1.5}.about-copy p{margin:0 0 17px}.about-copy p:last-child{margin-top:-10px;font-size:20px;color:var(--navy)}
@media(max-width:1150px){.desktop-nav{display:none}.menu-toggle{display:block}}
@media(max-width:600px){.about-hero img{aspect-ratio:16/9;object-fit:cover}.about-page{padding-top:28px}}

/* V1.9: featured cards and responsive visual consistency */
.feature-grid{gap:20px;margin-bottom:54px}
.feature{border-radius:14px;padding-bottom:26px;box-shadow:0 2px 10px rgba(11,40,65,.08)}
.feature-photo{aspect-ratio:16/9;object-position:center;max-height:none}
.feature h2{font-size:clamp(19px,1.9vw,23px);line-height:1.27;margin-top:11px}
.feature p{line-height:1.56;margin-bottom:19px}
.feature b{display:inline-flex;align-items:center;gap:5px}
.intro{margin-bottom:26px}
@media(max-width:780px){.feature-grid{gap:16px}.feature-photo{max-height:none;aspect-ratio:16/9}}
@media(max-width:600px){.feature-grid{margin-bottom:43px}.feature h2{font-size:21px}.intro{margin-bottom:22px}}

/* V2.1: shorter, topic-focused featured card imagery */
.feature-photo{aspect-ratio: 5/2;max-height:160px;object-fit:cover;object-position:center}
@media(max-width:780px){.feature-photo{aspect-ratio:5/2;max-height:175px}}
@media(max-width:600px){.feature-photo{aspect-ratio:5/2;max-height:180px}}

/* Template V1.2: compact photographic topic cards, consistent card heights */
.feature-photo{aspect-ratio:5 / 2;object-fit:cover;max-height:195px}
.feature{height:100%}
.feature-grid{align-items:stretch}
@media(max-width:780px){.feature-photo{max-height:210px}}
@media(max-width:480px){.feature-photo{max-height:170px}}
/* Optional About hero, available only when configured */
.about-hero img{display:block;width:100%;height:auto}

/* V1.6: stable card geometry, accessible touch navigation, ad-safe reading surfaces */
html{scroll-padding-top:18px}body{overflow-wrap:break-word}
.feature-grid,.cards{align-items:stretch}.feature,.guide-card{height:100%}
.feature,.guide-card{transition:transform .16s ease, box-shadow .16s ease}
.feature:focus-visible,.guide-card:focus-visible{outline:3px solid #da7a32;outline-offset:4px}
.article-layout,.article,.article section,.reference-panel{min-width:0}
.article p,.article li{overflow-wrap:break-word}
.article h2{scroll-margin-top:18px}
.maintenance-table-wrap{overscroll-behavior-x:contain}
.menu-toggle{min-width:44px;min-height:44px}
.drawer a{min-height:44px;display:flex;align-items:center}
@media(max-width:600px){.guide-card,.feature{min-width:0}.article .lead{line-height:1.55}.side-box{min-width:0}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}

/* V1.7: Photo-forward hero, responsive navigation and page imagery. */
.hero-photo{object-fit:cover;object-position:center}.hero-content{position:relative;z-index:1}.hero:before{content:none}
.feature-photo{aspect-ratio: 1100 / 580;max-height:none;object-fit:cover}
.about-hero img{aspect-ratio:1600 / 795;object-fit:cover}
.desktop-nav{gap:clamp(10px,1.03vw,16px)}.desktop-nav a{font-size:13px}
.desktop-nav a:focus-visible,.feature:focus-visible,.guide-card:focus-visible{outline:3px solid #cf963d;outline-offset:4px}
@media(min-width:1180px){.desktop-nav{display:flex}.menu-toggle{display:none}}
@media(max-width:1179px){.desktop-nav{display:none}.menu-toggle{display:block}}
@media(max-width:600px){.hero-photo{object-position:57% center}.about-hero img{aspect-ratio:16/9}}

/* V1.8: consistently cropped, short homepage photography and edge-to-edge hero. */
.hero{position:relative;isolation:isolate;min-height:clamp(325px,32vw,460px);background:#143b57 url('/assets/explorer-hero.jpg') center center / cover no-repeat}
.hero-picture{position:absolute;inset:0;display:block;width:100%;height:100%;overflow:hidden;z-index:0}
.hero-picture img.hero-photo{position:absolute;inset:0;display:block;width:100%;height:100%;min-width:100%;min-height:100%;object-fit:cover;object-position:center center}
.hero::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(90deg,rgba(10,32,54,.77) 0%,rgba(10,32,54,.42) 45%,rgba(10,32,54,.08) 100%)}
.hero-content{position:relative;z-index:2}
.feature-photo{display:block;width:calc(100% + 46px);height:clamp(112px,11vw,150px);aspect-ratio:auto;max-height:none;object-fit:cover;object-position:center center}
@media(max-width:780px){.hero{background-position:58% center}.hero-picture img.hero-photo{object-position:58% center}.feature-photo{height:clamp(120px,24vw,165px);max-height:none}}
@media(max-width:600px){.hero{min-height:330px;background-position:61% center}.hero-picture img.hero-photo{object-position:61% center}.hero-content{padding:45px 0 50px}.feature-photo{height:145px;max-height:none}}
@media(max-width:390px){.feature-photo{height:125px}}

/* V1.9: crop the embedded blue mattes out of both source JPGs and use one
   full-bleed picture layer. Image is never bounded by intrinsic dimensions. */
.hero{position:relative;isolation:isolate;overflow:hidden;display:flex;align-items:center;min-height:clamp(330px,36vw,470px);background:#10293c;background-image:none!important}
.hero-picture{position:absolute;inset:0;display:block;width:100%;height:100%;overflow:hidden;z-index:0}
.hero-picture .hero-photo{position:absolute;inset:0;display:block;width:100%;height:100%;max-width:none;max-height:none;object-fit:cover;object-position:50% 50%}
.hero::before{content:"";display:block;position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(90deg,rgba(8,27,43,.85),rgba(8,27,43,.35) 54%,rgba(8,27,43,.1))}
.hero .hero-content{position:relative;z-index:2}
@media(max-width:780px){.hero{min-height:350px}.hero-picture .hero-photo{object-position:54% center}}
@media(max-width:600px){.hero{min-height:365px}.hero-picture .hero-photo{object-position:54% center}.hero::before{background:linear-gradient(90deg,rgba(8,27,43,.83),rgba(8,27,43,.47) 65%,rgba(8,27,43,.16))}}

/* V2.7: accessibility, reading rhythm and predictable ad-friendly content geometry. */
.skip-link{position:absolute;left:12px;top:8px;z-index:100;background:#fff;color:#102c4e;padding:10px 16px;border:3px solid #a77943;border-radius:5px;transform:translateY(-160%)}
.skip-link:focus{transform:translateY(0)}
:where(main,section)[id]{scroll-margin-top:18px}
.feature,.guide-card{contain:layout style}
.feature-photo{height:clamp(112px,11vw,150px);width:calc(100% + 46px);aspect-ratio:auto;object-fit:cover}
.article{max-width:100%;min-width:0}.article p,.article li{overflow-wrap:break-word}.article p{max-width:75ch}
.article .lead{max-width:68ch}
.reference-panel,.maintenance-table-wrap{max-width:100%;min-width:0}
.maintenance-table th,.maintenance-table td{overflow-wrap:normal;word-break:normal}
.drawer[aria-hidden="true"]{visibility:hidden;pointer-events:none}
.drawer.open{overscroll-behavior:contain}
.top-inner,.article-layout,.footer-grid{min-width:0}
@media(max-width:780px){.feature-photo{height:clamp(120px,24vw,165px)}.article-layout{gap:24px}.sidebar{padding-top:0}}
@media(max-width:600px){.feature-photo{height:145px}.article p{line-height:1.7}.hero-content{padding-top:45px;padding-bottom:50px}}
@media(max-width:390px){.feature-photo{height:125px}}
@media(prefers-reduced-motion:reduce){.drawer,.feature,.guide-card{transition:none!important}}

/* V3.5: final hero geometry, supersedes earlier responsive experiments.
   The image itself, not a letterboxed background, fills the full hero area. */
.hero{position:relative;display:flex;align-items:center;isolation:isolate;overflow:hidden;background:#122b40!important;background-image:none!important;min-height:350px}
.hero>.hero-picture{position:absolute;display:block;inset:0;width:100%;height:100%;overflow:hidden;z-index:0}
.hero>.hero-picture>.hero-photo{display:block;position:absolute;inset:0;width:100%;height:100%;min-width:100%;min-height:100%;max-width:none;max-height:none;object-fit:cover;object-position:50% 50%}
.hero::before{content:"";display:block;position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(90deg,rgba(8,27,43,.82),rgba(8,27,43,.3) 65%,rgba(8,27,43,.05))}
.hero>.hero-content{position:relative;z-index:2}
@media(max-width:780px){.hero{min-height:360px}.hero>.hero-picture>.hero-photo{object-position:50% center}}
@media(max-width:600px){.hero{min-height:365px}.hero>.hero-picture>.hero-photo{object-position:50% center}}