/* ТЕСТ-ДНК.РФ • v6.1 • progressive static scientific portal */
:root{--navy:#0b1424;--navy2:#12243c;--navy3:#1b3850;--ink:#15263d;--muted:#687a90;--line:#dee7ee;--paper:#fff;--bg:#f4f7fa;--teal:#21d5be;--tealdark:#087b78;--cream:#f8fbfc;--shell:1840px;--radius:18px;--shadow:0 16px 42px rgba(16,39,64,.07)}
*,*:before,*:after{box-sizing:border-box}
html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"Segoe UI",Arial,sans-serif;font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}button{font:inherit}img,svg{max-width:100%}.icon{display:inline-block;flex-shrink:0;vertical-align:middle}
a:focus-visible,button:focus-visible{outline:3px solid var(--teal);outline-offset:3px}.shell{width:calc(100% - clamp(40px,6vw,120px));max-width:var(--shell);margin-inline:auto}
.skip{position:absolute;transform:translateY(-200%);background:#fff;padding:12px;z-index:100}.skip:focus{transform:none;left:12px;top:8px}
/* HEADER */
.site-header{position:relative;z-index:25}.header-top{background:#07111f;color:#94acc1;border-bottom:1px solid rgba(255,255,255,.09)}.topbar{min-height:35px;display:flex;justify-content:space-between;gap:20px;align-items:center;font-size:11px;font-weight:750;letter-spacing:.14em}.topbar-links{display:flex;gap:25px;letter-spacing:.01em;font-size:12px;font-weight:600}.topbar-links a:hover{color:var(--teal)}
.brand-bar{background:#0c192a;color:white}.brandbar-inner{min-height:109px;display:flex;align-items:center;justify-content:space-between;gap:26px}.brand{display:flex;gap:18px;align-items:center;min-width:0}.brand-symbol{width:64px;height:64px;display:grid;place-items:center;flex-shrink:0;border:1px solid rgba(79,222,209,.38);border-radius:18px;background:linear-gradient(145deg,#1b5460,#0c3b50);color:#70ffe1;transform:rotate(-5deg)}.brand-symbol .icon{height:37px;width:37px;transform:rotate(5deg)}.brand-words strong{display:block;white-space:nowrap;font-weight:900;font-size:clamp(25px,2.55vw,37px);letter-spacing:-.064em;line-height:1}.brand-words strong span{color:#55e4d1}.brand-words small{display:block;margin-top:11px;letter-spacing:.018em;font-size:13px;font-weight:550;color:#b9d0db}.brand-right{display:flex;align-items:center;gap:42px}.brand-descriptor{text-align:right;color:#8ba9bc;font-size:13px;line-height:1.4}.brand-cta{display:inline-flex;align-items:center;gap:15px;padding:15px 21px;border:1px solid #3d5c70;border-radius:11px;white-space:nowrap;font-size:14px;font-weight:800;color:white;transition:background .2s}.brand-cta:hover{background:#244459}.brand-cta .icon{width:17px;height:17px;color:#66e6d3}
.main-nav{background:#fff;border-bottom:1px solid #d5e1e8;box-shadow:0 4px 15px rgba(19,39,62,.035)}.nav-grid{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:2px}.nav-link{min-height:70px;padding:12px 10px;display:flex;align-items:center;justify-content:center;text-align:center;line-height:1.3;font-weight:750;font-size:clamp(13px,.91vw,16px);border-bottom:4px solid transparent;transition:background .2s,color .2s}.nav-link:hover{background:#f2faf9;color:#047e77}.nav-link.selected{border-bottom-color:#0abca8;color:#087a72;background:#f3fbfa}.mobile-navigation,.menu-toggle{display:none}
/* BUTTONS */
.button{display:inline-flex;align-items:center;justify-content:center;gap:13px;min-height:53px;padding:14px 22px;border-radius:10px;font-weight:800;font-size:15px;transition:transform .2s,filter .2s}.button:hover{transform:translateY(-2px);filter:brightness(1.05)}.button .icon{width:18px;height:18px}.button-accent{background:var(--teal);color:#092a32;box-shadow:0 8px 28px rgba(24,215,192,.16)}.button-ghost{border:1px solid #5c758c;color:#fff;background:rgba(255,255,255,.045)}.button-white{background:#fff;color:#14273e}
/* HOME HERO */
.home-hero{background:radial-gradient(circle at 78% 50%,#214a5a 0,#132b40 35%,#0b192c 69%,#071321 100%);color:#fff;position:relative;overflow:hidden}.home-hero:before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.18;background-image:linear-gradient(rgba(150,232,231,.13) 1px,transparent 1px),linear-gradient(90deg,rgba(150,232,231,.13) 1px,transparent 1px);background-size:75px 75px;mask-image:linear-gradient(90deg,transparent 20%,black 75%)}.home-hero-grid{display:grid;grid-template-columns:minmax(0,1.07fr) minmax(350px,.93fr);min-height:608px;gap:30px;position:relative}.home-hero-left{position:relative;z-index:4;padding:82px 0 76px}.hero-tag{display:inline-flex;align-items:center;gap:11px;border:1px solid rgba(69,217,199,.38);border-radius:50px;padding:8px 16px;background:rgba(33,190,169,.065);color:#95ecdb;font-size:12px;font-weight:800;letter-spacing:.13em}.tag-point{height:7px;width:7px;border-radius:50%;background:#33edd1;box-shadow:0 0 0 5px rgba(51,237,209,.12)}.home-hero h1{font-size:clamp(64px,6.1vw,110px);font-weight:900;letter-spacing:-.074em;line-height:1.01;margin:29px 0 25px}.home-hero h1 span{color:#55e4d1}.hero-lead{font-size:clamp(19px,1.37vw,24px);max-width:690px;line-height:1.53;font-weight:500;color:#e6eff3;margin:0 0 14px}.hero-demo{font-size:16px;line-height:1.7;color:#91abbe;max-width:620px;margin:0}.home-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:31px}.hero-statline{display:flex;flex-wrap:wrap;gap:36px;margin-top:47px;padding-top:23px;border-top:1px solid rgba(199,228,243,.18);color:#a3bfd0;font-size:14px}.hero-statline b{font-size:25px;color:#fff;letter-spacing:-.045em;margin-right:6px}.hero-illustration{position:relative;display:flex;align-items:center;justify-content:center;isolation:isolate}.hero-illustration img{position:relative;z-index:2;height:580px;max-width:none;width:auto;transform:rotate(-17deg);filter:drop-shadow(0 0 35px rgba(71,236,215,.22))}.hero-ring{position:absolute;top:50%;left:50%;border:1px solid rgba(88,215,214,.25);border-radius:50%;transform:translate(-50%,-50%);z-index:1}.ring-a{width:390px;height:390px}.ring-b{width:540px;height:540px;opacity:.6}.ring-c{width:690px;height:690px;opacity:.3}.hero-callout{position:absolute;z-index:3;border:1px solid rgba(121,237,223,.27);background:rgba(10,27,43,.73);backdrop-filter:blur(10px);border-radius:10px;font-size:12px;font-weight:780;letter-spacing:.07em;padding:15px 20px;white-space:nowrap;color:#bcefe9;box-shadow:0 14px 35px rgba(0,0,0,.16)}.callout-a{top:120px;left:-20px}.callout-b{bottom:134px;right:0}.callout-b span{color:#45f2d8}.callout-dot{display:inline-block;width:7px;height:7px;border-radius:100%;background:#4aecda;margin-right:10px}.hero-bottom-bar{border-top:1px solid rgba(181,217,228,.15);background:#071522}.hero-bottom-bar .shell{display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px;padding-block:15px;color:#83a6b7;font-size:12px;font-weight:760;letter-spacing:.15em}
/* HOME SECTIONS */
.landing-section{padding:89px 0 103px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:31px}.section-eyebrow,.content-kicker{font-size:13px;letter-spacing:.13em;font-weight:850;color:#087e77}.section-heading h2{font-size:clamp(36px,3.3vw,53px);letter-spacing:-.058em;line-height:1.1;margin:10px 0}.section-heading p{font-size:18px;margin:0;color:var(--muted)}.section-more,.text-arrow{display:inline-flex;align-items:center;gap:12px;white-space:nowrap;color:#067f77;font-weight:830;font-size:16px}.section-more .icon,.text-arrow .icon{width:19px}.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.feature-card{min-height:337px;padding:30px;border:1px solid #dae5eb;border-radius:16px;background:#fff;display:flex;flex-direction:column;transition:transform .23s,box-shadow .23s,border-color .23s}.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#5ed7ca}.fc-top{display:flex;justify-content:space-between;align-items:center;color:#087b74}.fc-top>.icon{height:46px;width:46px;stroke-width:1.4}.fc-top span{font-size:13px;letter-spacing:.13em;color:#91a7b4;font-weight:850}.feature-card h3{font-size:clamp(22px,1.64vw,27px);letter-spacing:-.045em;line-height:1.23;margin:28px 0 10px}.feature-card p{font-size:15px;color:var(--muted);line-height:1.65;margin:0 0 23px}.fc-action{margin-top:auto;display:inline-flex;align-items:center;gap:13px;color:#0a8179;font-size:15px;font-weight:800}.fc-action .icon{height:18px;width:18px}
.mission-band{background:#e7f0f3;border-top:1px solid #d9e6ea;border-bottom:1px solid #d9e6ea;padding:84px 0}.mission-grid{display:grid;grid-template-columns:minmax(300px,.87fr) minmax(0,1.13fr);gap:clamp(40px,6vw,110px);align-items:center}.mission-graphic{height:455px;background:radial-gradient(circle at 45% 50%,#225b65,#102a42 65%,#0a1c31);border-radius:18px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}.mission-graphic:before,.mission-graphic:after{content:"";position:absolute;border-radius:100%;border:1px solid rgba(113,219,222,.3);width:380px;height:380px}.mission-graphic:after{width:510px;height:510px;opacity:.5}.mission-graphic img{height:390px;z-index:2;filter:drop-shadow(0 0 22px rgba(55,223,212,.22))}.mission-graphic>span,.mission-graphic>strong{position:absolute;z-index:3;font-size:13px;letter-spacing:.13em;color:#93d9d4}.mission-graphic>span{top:25px;left:30px}.mission-graphic>strong{right:30px;bottom:27px;font-weight:750}.mission-content h2{font-size:clamp(41px,4vw,64px);line-height:1.12;letter-spacing:-.06em;margin:16px 0 25px}.mission-content h2 em{font-style:normal;color:#117b78}.mission-content>p{font-size:19px;line-height:1.7;color:#556d80;max-width:720px}.mission-points{margin:24px 0 30px;border-top:1px solid #cbdde1}.mission-points>div{padding:13px 0;border-bottom:1px solid #cbdde1;display:flex;gap:20px;font-weight:680}.mission-points span{color:#11847d;font-weight:850}.more-section{padding-bottom:112px}.all-links-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.all-links-grid a{display:flex;align-items:center;gap:14px;padding:21px;background:white;border:1px solid #dee6ed;border-radius:12px;font-weight:700;font-size:16px}.all-links-grid a:hover{border-color:#41ccbb}.all-links-grid a .icon:first-child{color:#0c9187}.all-links-grid a .icon:last-child{margin-left:auto;height:17px;width:17px;color:#92a0ac}.home-cta{background:#0b1b2f;color:white;padding:59px 0}.cta-in{display:flex;align-items:center;justify-content:space-between;gap:30px}.cta-in span{font-size:12px;letter-spacing:.15em;color:#61d9c8;font-weight:800}.cta-in h2{font-size:clamp(28px,3vw,42px);letter-spacing:-.045em;margin:9px 0 0}
/* BREADCRUMB + INNER HERO */
.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:11px;padding:24px 0;font-size:14px;font-weight:600;color:#748699}.breadcrumbs a:hover{color:#087f77}.crumb-div{color:#b8c5ce}
.inner-hero{background:radial-gradient(circle at 88% 55%,#235466 0,#16334b 36%,#0d2238 67%,#0c1d31 100%);color:white;overflow:hidden;position:relative}.inner-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(65,237,219,.05));pointer-events:none}.inner-hero-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(190px,.55fr);position:relative;min-height:274px;align-items:center}.intro-copy{position:relative;z-index:2;padding:51px 0 56px}.overline{display:flex;gap:25px;align-items:center;font-size:12px;color:#79e9dc;font-weight:900;letter-spacing:.15em}.intro-index{padding-left:22px;border-left:1px solid #477c88;color:#a7c8d5}.intro-copy h1{font-size:clamp(45px,4vw,68px);line-height:1.08;max-width:1040px;margin:15px 0 12px;letter-spacing:-.06em;font-weight:900}.intro-copy>p{font-size:18px;line-height:1.6;max-width:880px;color:#d1e0e7;margin:0}.intro-hint{display:inline-flex;align-items:center;gap:9px;margin-top:17px;color:#8fb9c3;letter-spacing:.07em;font-size:11px;font-weight:790}.hint-dot{width:7px;height:7px;border-radius:50%;background:#56e7d1}.inner-visual{height:100%;position:relative;pointer-events:none}.inner-visual img{position:absolute;top:-100px;right:50px;height:450px;width:auto;transform:rotate(-15deg);filter:drop-shadow(0 0 28px rgba(60,214,208,.25));opacity:.84}.orb{position:absolute;right:60px;top:50%;transform:translateY(-50%);width:300px;height:300px;border:1px solid rgba(91,200,209,.19);border-radius:50%}.orb-two{width:450px;height:450px;right:-10px;opacity:.55}
/* INNER PAGES */
.inside-layout{display:grid;grid-template-columns:minmax(0,1fr) clamp(300px,23vw,370px);gap:28px;align-items:start;padding-top:42px;padding-bottom:105px}.main-stack{min-width:0}.editorial-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:clamp(30px,3.5vw,60px);box-shadow:0 6px 28px rgba(26,51,69,.025)}.card-topline{display:flex;align-items:center;justify-content:space-between;gap:20px}.sample-flag{font-size:11px;background:#e8f9f5;border:1px solid #b5e9df;border-radius:50px;color:#087d74;font-weight:900;letter-spacing:.1em;padding:7px 11px}.editorial-card h2{font-size:clamp(31px,2.7vw,42px);line-height:1.2;letter-spacing:-.052em;margin:23px 0 16px}.editorial-card h3{font-size:clamp(26px,2.2vw,34px);letter-spacing:-.04em;line-height:1.18;margin:36px 0 14px}.editorial-card .lead{font-size:20px;line-height:1.68;color:#4b6478;max-width:910px;margin:0 0 27px}.skeleton-text{display:grid;gap:12px;margin-bottom:32px}.skeleton-text span{display:block;height:11px;border-radius:40px;background:linear-gradient(90deg,#e7edf2,#f2f5f8)}.skeleton-text span:nth-child(1){width:98%}.skeleton-text span:nth-child(2){width:85%}.skeleton-text span:nth-child(3){width:94%}.skeleton-text span:nth-child(4){width:59%}.skeleton-text.short span:nth-child(1){width:97%}.skeleton-text.short span:nth-child(2){width:90%}.skeleton-text.short span:nth-child(3){width:66%}.media-slot{height:clamp(215px,21vw,350px);border-radius:14px;overflow:hidden;background:radial-gradient(circle at 72% 50%,#26526a,#122841 60%,#0b1c31);position:relative;display:flex;align-items:center;justify-content:center;isolation:isolate}.media-slot:before{content:"";position:absolute;width:430px;height:430px;border:1px solid rgba(94,225,214,.16);border-radius:50%;top:50%;left:50%;transform:translate(-50%,-50%)}.media-slot-art{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}.media-atom{height:160px;width:160px;border:1px solid #4ba3a0;border-radius:50%;color:#7ae8d7;display:grid;place-items:center;background:rgba(62,200,187,.07);box-shadow:0 0 0 45px rgba(70,189,194,.04)}.media-atom .icon{height:78px;width:78px;stroke-width:1.05}.media-star{position:absolute;right:19%;top:18%;font-size:28px;color:#62adba;opacity:.7}.media-caption{position:absolute;left:25px;bottom:25px;display:flex;flex-direction:column;gap:3px;padding:15px 19px;background:rgba(7,22,37,.75);border:1px solid rgba(125,211,217,.24);color:#fff;border-radius:10px;backdrop-filter:blur(9px)}.media-caption strong{font-size:16px}.media-caption span{font-size:13px;color:#aac9d2}.demo-note{color:#5d7387;font-size:18px;line-height:1.75;max-width:950px}.editorial-meta{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;margin-top:40px;padding-top:22px;border-top:1px solid #e1e9ee;color:#90a0af;font-size:11px;font-weight:830;letter-spacing:.08em}
.side-column{position:sticky;top:20px;display:grid;gap:19px}.side-card{background:#fff;border:1px solid #dbe6ec;border-radius:15px;overflow:hidden;box-shadow:0 9px 27px rgba(18,43,70,.045)}.side-top{background:#10243a;padding:27px 26px;color:white}.side-top>span{display:block;color:#58d9c6;font-size:11px;letter-spacing:.14em;font-weight:850}.side-top h2{font-size:23px;margin:6px 0 0;letter-spacing:-.035em}.side-items{padding:12px}.side-item{display:flex;align-items:center;gap:12px;padding:15px 13px;border-radius:9px;font-size:16px;font-weight:650;color:#496176;line-height:1.4}.side-item .side-mini{font-size:11px;color:#93a5b4;font-weight:820}.side-item .icon{height:15px;width:15px;margin-left:auto;color:#9babb7}.side-item:hover,.side-item.is-active{background:#e5f7f3;color:#086f6b}.side-item.is-active{font-weight:820}.side-help{background:#e5f1f3;border:1px solid #d0e4e8;padding:25px;border-radius:15px}.side-help-kicker{font-size:11px;letter-spacing:.12em;color:#078179;font-weight:860}.side-help h3{font-size:23px;line-height:1.2;letter-spacing:-.035em;margin:11px 0}.side-help p{color:#5c7887;margin:0 0 17px;font-size:15px}.side-help a{display:inline-flex;align-items:center;gap:8px;font-size:15px;color:#087a72;font-weight:850}.side-help .icon{height:18px;width:18px}
.section-articles{padding-top:43px}.section-articles-title h2{font-size:33px;letter-spacing:-.048em;margin:4px 0 19px}.article-tile-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.article-tile{min-width:0;background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;min-height:175px;display:flex;flex-direction:column;align-items:start;position:relative;transition:border-color .2s,transform .2s}.article-tile:hover{border-color:#54cabd;transform:translateY(-3px)}.tile-number{font-size:12px;color:#008c83;letter-spacing:.15em;font-weight:850}.tile-copy{margin-top:21px}.tile-copy b{display:block;font-size:19px;line-height:1.25;letter-spacing:-.026em}.tile-copy small{display:block;margin-top:10px;color:#7a8f9f;line-height:1.4;font-size:13px}.article-tile>.icon{position:absolute;right:16px;top:20px;color:#208980;height:19px;width:19px}
/* SITEMAP & LEGAL */
.page-slim-hero{background:#12283f;color:#fff;padding:58px 0 65px}.page-slim-hero .section-eyebrow{color:#6bddcc}.page-slim-hero h1{font-size:clamp(48px,5vw,75px);line-height:1.12;letter-spacing:-.065em;margin:10px 0 13px}.page-slim-hero p{font-size:19px;max-width:880px;color:#c1d4dd;margin:0}.map-section{padding-top:48px;padding-bottom:90px}.sitemap-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:19px}.map-card{background:#fff;border:1px solid #dce6eb;border-radius:15px;padding:25px;min-width:0;display:flex;flex-direction:column;min-height:300px;box-shadow:0 5px 18px rgba(22,45,65,.025)}.map-head{display:flex;justify-content:space-between;align-items:center}.map-no{font-size:12px;font-weight:900;letter-spacing:.15em;color:#849bab}.map-icon{color:#0b8b80}.map-icon .icon{width:31px;height:31px}.map-card h3{font-size:22px;letter-spacing:-.045em;line-height:1.22;margin:19px 0 14px}.map-card h3 a:hover{color:#058e82}.map-card ul{margin:0 0 18px;padding:0;list-style:none;display:grid;gap:10px}.map-card li a{font-size:15px;line-height:1.45;color:#587084}.map-card li a:hover{color:#078f84;text-decoration:underline}.map-explore{display:inline-flex;gap:9px;align-items:center;color:#078277;font-size:14px;font-weight:840;margin-top:auto;padding-top:8px}.map-explore .icon{width:17px;height:17px}.service-links{border-top:1px solid #d9e5ec;margin-top:45px;padding-top:28px}.service-links h2{font-size:23px;letter-spacing:-.035em;margin:0 0 16px}.service-links>div{display:flex;gap:14px;flex-wrap:wrap}.service-links a{display:inline-block;padding:10px 15px;background:#fff;border:1px solid #d9e6ec;border-radius:9px;font-weight:700;font-size:15px}.service-links a:hover{color:#087f77;border-color:#0da997}.info-page{padding-top:44px;padding-bottom:110px;max-width:1300px}.info-page .editorial-card{min-height:260px}
/* 403,404 */
.error-hero{background:radial-gradient(circle at 80% 30%,#245266,#0d2239 47%,#0b1729 92%);color:#fff;overflow:hidden}.error-main{display:grid;grid-template-columns:minmax(0,1fr) minmax(270px,.5fr);align-items:center;gap:25px;min-height:430px}.error-copy{padding:63px 0}.error-brow{font-size:13px;letter-spacing:.17em;color:#76e4d4;font-weight:850}.error-copy h1{font-size:clamp(40px,4.7vw,75px);letter-spacing:-.065em;line-height:1.08;margin:15px 0 17px}.error-copy p{font-size:20px;line-height:1.58;color:#d0e1e7;max-width:740px;margin:0}.error-actions{display:flex;flex-wrap:wrap;gap:13px;margin-top:28px}.error-copy small{display:block;margin-top:28px;font-size:14px;color:#9bb5c4;line-height:1.5}.error-big{font-size:clamp(130px,18vw,275px);letter-spacing:-.12em;color:rgba(68,224,211,.21);font-weight:900;text-align:center;line-height:.9;position:relative;text-shadow:0 0 60px rgba(49,221,211,.08)}.error-big span{display:block;color:#7bced0;font-size:15px;letter-spacing:.18em;line-height:1.5;margin-top:12px;font-weight:850;text-shadow:none}.error-navigation{padding:76px 0 98px}.error-map-heading{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:28px}.error-map-heading h2{font-size:clamp(35px,3.4vw,53px);letter-spacing:-.053em;line-height:1.12;margin:10px 0}.error-map-heading p{margin:0;font-size:18px;color:#6b7e91}.error-navigation .map-card{min-height:275px}
/* FOOTER */
.site-footer{background:#071422;color:#b1c3d3}.footer-main{display:grid;grid-template-columns:minmax(230px,1.45fr) repeat(4,minmax(0,1fr));gap:clamp(20px,3vw,52px);padding-top:67px;padding-bottom:57px}.footer-logo{display:inline-flex;align-items:center;gap:14px;color:#fff;font-size:25px;font-weight:900;letter-spacing:-.048em}.footer-logo .icon{height:30px;width:30px;color:#4ae5d0}.footer-brand p{font-size:15px;max-width:330px;line-height:1.65;color:#92adbe}.footer-map-link{display:inline-flex;align-items:center;gap:9px;color:#62e5d3;font-weight:800;font-size:15px;margin-top:5px}.footer-map-link .icon{width:18px;height:18px}.footer-col h3{margin:4px 0 21px;font-size:12px;color:#7de0d4;letter-spacing:.12em}.footer-col a{display:block;font-size:14px;line-height:1.5;margin:0 0 14px;color:#adc0cf}.footer-col a:hover{color:white}.footer-bottom{border-top:1px solid #243a4e;padding-block:21px 28px;display:flex;gap:20px;justify-content:space-between;font-size:12px;color:#829bad}.footer-bottom a:hover{color:#fff}
/* RESPONSIVENESS */
@media(max-width:1450px){.shell{width:calc(100% - 68px)}.brand-descriptor{display:none}.feature-card{padding:25px}.feature-card h3{font-size:22px}.feature-grid{gap:15px}.sitemap-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.map-card{padding:21px}.map-card h3{font-size:20px}.article-tile-grid{gap:12px}.article-tile{padding:20px}.tile-copy b{font-size:17px}}
@media(max-width:1150px){.nav-link{font-size:13px;padding:12px 6px}.brandbar-inner{min-height:98px}.brand-words strong{font-size:29px}.brand-words small{font-size:12px}.home-hero-grid{min-height:570px}.home-hero h1{font-size:clamp(58px,6.7vw,83px)}.hero-illustration img{height:500px}.feature-grid,.all-links-grid,.sitemap-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-card{min-height:255px}.mission-graphic{height:395px}.mission-graphic img{height:340px}.inside-layout{grid-template-columns:minmax(0,1fr) 285px;gap:20px}.editorial-card{padding:32px}.side-item{font-size:14px}.article-tile-grid{grid-template-columns:1fr}.article-tile{min-height:110px}.tile-copy{margin-top:14px}.error-navigation .sitemap-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-main{grid-template-columns:repeat(4,1fr)}.footer-brand{grid-column:1/-1}.footer-brand p{max-width:700px}}
@media(max-width:880px){.shell{width:calc(100% - 40px)}.topbar{font-size:10px}.topbar-links{display:none}.brand-bar .brandbar-inner{height:86px;min-height:86px}.brand-symbol{height:52px;width:52px}.brand-symbol .icon{height:31px;width:31px}.brand-words strong{font-size:27px}.brand-words small{font-size:10px}.brand-cta,.main-nav{display:none}.menu-toggle{display:inline-grid;place-items:center;border:1px solid #446174;border-radius:10px;width:47px;height:47px;background:none;color:#fff;cursor:pointer}.mobile-navigation.is-open{display:grid;background:#101f32;padding:10px 20px 24px;border-top:1px solid #254054;box-shadow:0 16px 23px rgba(0,0,0,.15)}.mobile-navigation a{font-size:16px;padding:11px 6px;color:#e2eff3;border-bottom:1px solid #263e50;font-weight:700}.home-hero-grid{grid-template-columns:1fr;min-height:unset}.home-hero-left{padding:78px 0 90px}.home-hero h1{font-size:clamp(58px,9vw,85px)}.hero-illustration{position:absolute;inset:0 -190px 0 35%;opacity:.25;pointer-events:none}.hero-illustration img{height:590px}.hero-callout{display:none}.hero-lead{max-width:650px}.hero-demo{max-width:560px}.mission-grid{grid-template-columns:1fr;gap:38px}.mission-graphic{height:340px}.mission-graphic img{height:300px}.inside-layout{grid-template-columns:1fr;gap:26px}.side-column{position:static;grid-row:1;grid-template-columns:1fr 1fr;gap:16px}.side-help{align-self:start}.inner-hero-grid{grid-template-columns:1fr;min-height:245px}.inner-visual{position:absolute;right:0;top:0;bottom:0;width:40%;opacity:.24}.inner-visual img{right:-50px}.intro-copy{padding:45px 0}.intro-copy h1{font-size:clamp(42px,6vw,60px)}.intro-copy>p{max-width:700px}.editorial-card{padding:36px}.article-tile-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.footer-main{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1}.error-main{grid-template-columns:1fr;min-height:350px}.error-copy{padding:55px 0}.error-big{position:absolute;right:4%;top:40px;font-size:170px;opacity:.3}.error-copy{position:relative;z-index:2}}
@media(max-width:600px){body{font-size:16px}.brand-symbol{width:45px;height:45px;border-radius:13px}.brand-words strong{font-size:23px}.brand-words small{font-size:9px;max-width:245px;white-space:normal;line-height:1.4}.brand{gap:10px}.hero-tag{font-size:10px;letter-spacing:.09em}.home-hero-left{padding:57px 0 63px}.home-hero h1{font-size:clamp(50px,12vw,68px)}.hero-lead{font-size:18px}.hero-demo{font-size:15px}.home-actions{flex-direction:column;align-items:stretch}.hero-statline{gap:15px 26px;margin-top:34px}.hero-statline span{font-size:12px}.hero-statline b{font-size:20px}.hero-bottom-bar .shell{gap:12px}.hero-bottom-bar span{font-size:10px}.landing-section{padding:60px 0}.section-heading{display:block}.section-heading h2,.mission-content h2{font-size:38px}.section-heading p{font-size:16px}.section-more{margin-top:15px}.feature-grid,.all-links-grid,.sitemap-grid,.error-navigation .sitemap-grid{grid-template-columns:1fr}.feature-card{min-height:235px}.feature-card h3{font-size:25px}.mission-band{padding:60px 0}.mission-content>p{font-size:17px}.mission-graphic{height:260px}.mission-graphic img{height:250px}.cta-in,.error-map-heading{display:block}.cta-in .button{margin-top:20px}.page-slim-hero{padding:42px 0}.page-slim-hero h1{font-size:47px}.page-slim-hero p{font-size:17px}.map-section{padding-top:25px}.map-card{min-height:unset}.breadcrumbs{padding:17px 0;font-size:12px}.intro-copy{padding:38px 0}.intro-copy h1{font-size:clamp(38px,9vw,52px)}.intro-copy>p{font-size:16px}.intro-hint{font-size:10px}.inner-visual{opacity:.1}.inside-layout{padding-top:23px;padding-bottom:63px}.side-column{grid-template-columns:1fr}.side-help{display:none}.side-top{padding:17px 20px}.side-top h2{font-size:20px}.side-item{padding:10px;font-size:14px}.editorial-card{padding:23px}.editorial-card h2{font-size:30px}.editorial-card h3{font-size:25px}.editorial-card .lead,.demo-note{font-size:16px}.media-slot{height:245px}.media-caption{left:14px;right:14px;bottom:14px}.media-caption span{font-size:11px}.editorial-meta{display:grid;font-size:10px}.article-tile-grid{grid-template-columns:1fr}.error-main{min-height:unset}.error-copy{padding:48px 0 60px}.error-copy h1{font-size:44px}.error-copy p{font-size:17px}.error-actions{flex-direction:column;align-items:stretch}.error-big{font-size:120px;right:2%;top:60px}.error-navigation{padding:56px 0}.error-map-heading h2{font-size:37px}.error-map-heading p{font-size:16px}.footer-main{padding-top:42px;padding-bottom:30px;gap:24px}.footer-brand{grid-column:1/-1}.footer-logo{font-size:22px}.footer-col h3{margin-bottom:14px}.footer-col a{font-size:13px}.footer-bottom{display:grid;gap:8px}.service-links{margin-top:30px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

/* v4 — editorial content, article table of contents, references */
.editorial-card .article-prose {max-width:980px;font-size:18px;line-height:1.84;color:#273c50}
.article-prose p {margin:0 0 1.28em;overflow-wrap:break-word}
.article-prose p:first-child {font-size:clamp(18px,1.28vw,21px);line-height:1.75;color:#344c61;font-weight:520}
.article-prose h2 {font-size:clamp(26px,2.25vw,35px);letter-spacing:-.045em;line-height:1.23;margin:1.7em 0 .55em;scroll-margin-top:28px}
.article-prose h3 {font-size:clamp(22px,1.8vw,28px);margin:1.5em 0 .6em;scroll-margin-top:28px}
.article-prose h2:first-child {margin-top:0}
.article-prose ul {padding-left:1.35em}
.article-prose li {margin:8px 0}
.article-prose strong {color:#10283e}
.reading-time {font-size:13px;color:#6e8492}
.review-notice {border-radius:12px;border:1px solid #efdaa9;border-left:5px solid #cd9540;background:#fff8e9;color:#6a4e19;padding:19px 22px;margin-bottom:30px;font-size:15px;line-height:1.7}
.review-notice strong {display:block;color:#5c4115;font-size:16px}
.article-sources {margin-top:43px;border-top:1px solid #dfe8ed;padding-top:28px;max-width:1000px}
.article-sources h2 {font-size:27px;letter-spacing:-.04em;margin:0 0 12px}
.article-sources p {font-size:14px;line-height:1.65;color:#718496;margin:0 0 14px}
.article-sources ol {padding-left:24px;margin:0}
.article-sources li {padding:8px 0;line-height:1.5;font-size:15px}
.article-sources a {color:#087d77;text-decoration:underline;text-decoration-color:rgba(0,124,115,.28);text-underline-offset:3px}
.article-sources a:hover {text-decoration-color:currentColor}
.related-reading {padding:39px 0 0}
.related-reading h2 {font-size:30px;margin:5px 0 20px;letter-spacing:-.04em}
.related-grid {display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.related-grid a {display:flex;justify-content:space-between;align-items:center;gap:15px;padding:22px;background:#fff;border-radius:12px;border:1px solid #d9e7ec;font-size:17px;font-weight:750;line-height:1.35}
.related-grid a:hover {border-color:#23b6a5;color:#007f77;box-shadow:0 8px 20px rgba(0,62,65,.06)}
.related-grid .icon {height:19px;width:19px}
.toc-card {border:1px solid #dce8ec;background:#fff;border-radius:15px;padding:23px 25px;display:grid;gap:11px}
.toc-card h2 {font-size:20px;letter-spacing:-.03em;margin:0 0 7px}
.toc-card a {font-size:14px;color:#526a80;line-height:1.5;padding:4px 0 4px 12px;border-left:2px solid #dcebe8}
.toc-card a:hover {color:#048b80;border-left-color:#0eb5a3}
.article-tile {min-height:180px}
.tile-copy small {display:block;line-height:1.55}
@media(max-width:1150px){.article-prose{font-size:17px}.related-grid{grid-template-columns:1fr}}
@media(max-width:600px){.editorial-card .article-prose{font-size:16px;line-height:1.75}.article-prose p:first-child{font-size:17px}.review-notice{padding:15px}.toc-card{padding:17px}.related-grid a{font-size:15px;padding:18px}}

/* v5: wide encyclopedia landing, real deep-linked topics, never replace the v3 hero */
#atlas,#questions,.home-atlas-card{scroll-margin-top:26px}
.quick-questions{padding:88px 0 94px;background:linear-gradient(180deg,#eaf2f5 0%,#f5f9fa 100%);border-block:1px solid #dbe8ee}
.question-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.question-tile{position:relative;display:flex;flex-direction:column;align-items:flex-start;min-height:150px;background:#fff;padding:25px 48px 22px 25px;border:1px solid #dbe7ed;border-radius:14px;box-shadow:0 4px 18px rgba(9,30,51,.035);transition:transform .2s,border-color .2s,box-shadow .2s}
.question-tile:hover{transform:translateY(-4px);border-color:#17b3a8;box-shadow:0 18px 28px rgba(17,51,73,.08)}
.question-label{font-size:20px;line-height:1.3;font-weight:850;letter-spacing:-.035em;color:#132a40}
.question-tile small{display:block;color:#667c8d;font-size:14px;line-height:1.55;margin-top:9px}
.question-tile>.icon{position:absolute;right:22px;bottom:25px;width:19px;height:19px;color:#06988c}
.home-atlas-section{padding:99px 0 115px;background:#f8fbfc}
.atlas-jump{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:2px 0 34px}
.atlas-jump a{display:flex;align-items:center;justify-content:space-between;gap:8px;background:#fff;border:1px solid #dbe7ed;border-radius:10px;padding:12px 15px;font-weight:750;font-size:14px;line-height:1.3;transition:background .2s,border-color .2s}
.atlas-jump a .icon{width:17px;height:17px;color:#0aa99a}
.atlas-jump a:hover{background:#e9f8f5;border-color:#9adbd2}
.home-atlas-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:23px;align-items:stretch}
.home-atlas-card{min-width:0;display:flex;flex-direction:column;background:#fff;border:1px solid #d6e4e9;border-radius:19px;overflow:hidden;box-shadow:0 8px 24px rgba(12,37,57,.045)}
.home-atlas-head{display:flex;gap:16px;align-items:flex-start;background:linear-gradient(122deg,#0c2136,#17384a);color:#fff;padding:27px 30px}
.home-atlas-no{font-size:12px;color:#79c8bb;font-weight:850;padding-top:6px;letter-spacing:.07em}
.home-atlas-icon{flex-shrink:0;width:48px;height:48px;border:1px solid rgba(94,231,212,.26);border-radius:11px;background:rgba(48,198,183,.12);color:#53dcc9;display:grid;place-items:center}
.home-atlas-icon .icon{height:28px;width:28px}
.home-atlas-kicker{font-size:11px;color:#69d5c5;font-weight:820;letter-spacing:.11em}
.home-atlas-head>div:last-child{min-width:0}
.home-atlas-head h3{font-size:clamp(23px,1.8vw,30px);line-height:1.22;letter-spacing:-.046em;margin:5px 0 10px}
.home-atlas-head h3 a{display:inline-flex;gap:12px;align-items:center}
.home-atlas-head h3 .icon{height:20px;width:20px;color:#48ead0}
.home-atlas-head p{font-size:14px;color:#bbd0dc;line-height:1.55;margin:0}
.home-atlas-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;padding:16px 21px 19px;flex:1}
.home-atlas-links a{display:flex;align-items:flex-start;justify-content:space-between;gap:9px;color:#294358;padding:12px 11px;border-bottom:1px solid #e9eff2;font-size:15px;line-height:1.4;font-weight:680;transition:background .15s,color .15s;min-width:0}
.home-atlas-links a .icon{width:17px;height:17px;flex-shrink:0;color:#8fabb3}
.home-atlas-links a:hover{background:#eaf8f5;color:#087e75;border-radius:6px}
.home-atlas-more{margin:0 30px 24px;border:1px solid #d7ebe7;background:#f2faf8;color:#09796f;border-radius:10px;display:flex;align-items:center;justify-content:space-between;padding:13px 17px;font-weight:850;font-size:15px}
.home-atlas-more:hover{background:#d9f7f0}.home-atlas-more .icon{height:19px;width:19px}
.home-cta .cta-in p{font-size:15px;color:#b6cfda;margin:8px 0 0}
/* Per-section directories */
.section-atlas{margin-top:40px}
.section-atlas .section-articles-title p{font-size:16px;line-height:1.6;color:#61758a;margin:8px 0 24px}
.atlas-topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.atlas-topic{display:flex;align-items:flex-start;gap:13px;background:#fff;border:1px solid #dae7ec;border-radius:12px;padding:20px 18px;transition:background .2s,border-color .2s,transform .2s}
.atlas-topic:hover{background:#f5fcfa;border-color:#56c6b8;transform:translateY(-2px)}
.atlas-topic-dot{height:8px;width:8px;flex-shrink:0;border-radius:100%;background:#16c2ac;margin-top:9px;box-shadow:0 0 0 5px #e7f8f4}
.atlas-topic>span:nth-child(2){display:block;min-width:0;flex:1}
.atlas-topic b{display:block;font-size:18px;line-height:1.35;letter-spacing:-.025em;color:#1b354a}
.atlas-topic small{display:block;margin-top:8px;color:#6c8091;font-size:13px;line-height:1.55}
.atlas-topic>.icon{width:17px;height:17px;color:#0d9b8b;margin-top:4px}
.side-top p{font-size:13px;color:#b1c4ce;margin:8px 0 0}
/* dense content still readable at intermediate widths */
@media(max-width:1500px){.home-atlas-head{padding:24px}.home-atlas-links{padding:12px 13px 16px}.home-atlas-links a{font-size:14px;padding:11px 9px}.question-label{font-size:18px}}
@media(max-width:1200px){.question-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home-atlas-grid{gap:17px}.home-atlas-head{gap:11px}.home-atlas-links{grid-template-columns:1fr}.home-atlas-links a{font-size:15px}.atlas-jump{grid-template-columns:repeat(2,minmax(0,1fr))}.atlas-topic-grid{grid-template-columns:1fr}}
@media(max-width:850px){.home-atlas-grid{grid-template-columns:1fr}.home-atlas-links{grid-template-columns:repeat(2,minmax(0,1fr))}.atlas-jump{grid-template-columns:repeat(2,minmax(0,1fr))}.quick-questions,.home-atlas-section{padding:65px 0}.question-label{font-size:18px}}
@media(max-width:600px){.question-grid{grid-template-columns:1fr}.question-tile{min-height:112px;padding:18px 47px 16px 18px}.home-atlas-links{grid-template-columns:1fr}.home-atlas-head{padding:22px 19px}.home-atlas-head h3{font-size:23px}.home-atlas-icon{width:40px;height:40px}.home-atlas-icon .icon{width:23px;height:23px}.home-atlas-links a{font-size:15px;padding:12px 5px}.home-atlas-more{margin:0 18px 18px}.atlas-jump{grid-template-columns:1fr}.atlas-topic{padding:16px}.atlas-topic b{font-size:16px}.section-atlas{margin-top:25px}}
.atlas-searchbox{margin:1px 0 27px;padding:20px 24px;border:1px solid #d5e5e9;border-radius:14px;background:#fff;box-shadow:0 4px 16px rgba(15,42,60,.035)}
.atlas-searchbox>label{display:block;color:#087d74;font-size:12px;font-weight:850;letter-spacing:.1em;margin-bottom:10px}
.atlas-searchline{display:flex;align-items:center;gap:14px}
.atlas-searchline>.icon{width:24px;height:24px;color:#149c90}
.atlas-searchline input{font-family:inherit;border:0;background:transparent;outline:none;font-size:18px;line-height:1.45;color:#15354a;min-width:0;flex:1}
.atlas-searchline input:focus-visible{outline:2px solid #0aa998;outline-offset:6px;border-radius:3px}
.atlas-searchline input::placeholder{color:#8093a3}
.atlas-searchline [data-atlas-count]{white-space:nowrap;border-radius:8px;padding:7px 12px;background:#edf8f6;color:#067e74;font-weight:800;font-size:13px}
.atlas-no-results{color:#617789;font-size:15px;padding-top:9px;margin:0}
.atlas-no-results[hidden]{display:none}
@media(max-width:600px){.atlas-searchbox{padding:17px}.atlas-searchline{gap:10px}.atlas-searchline input{font-size:15px}.atlas-searchline [data-atlas-count]{font-size:12px;padding:6px}}
@media(max-width:600px){.home-hero .hero-illustration{opacity:.23;pointer-events:none}.home-hero .hero-callout{display:none}}

/* ============================================================
   v6.1 — modular portal navigation, curated landing and footer
   The existing wide v5 visual language and typography are retained.
   ============================================================ */
:root{--footer-border:rgba(192,223,231,.16)}
/* Four semantic groups; no duplicate footer navigation links. */
.site-footer{background:radial-gradient(circle at 0 0,rgba(18,64,79,.42),transparent 40%),#071522}
.footer-content{padding-top:62px;padding-bottom:66px}
.footer-identity{display:flex;align-items:center;gap:34px;padding-bottom:34px;border-bottom:1px solid var(--footer-border)}
.footer-identity .footer-logo{font-size:clamp(26px,2.2vw,34px);white-space:nowrap}
.footer-identity .footer-logo .icon{width:37px;height:37px}
.footer-identity p{font-size:16px;color:#e5f4f4;font-weight:730;margin:0;flex:1}
.footer-mission{color:#9bb6c8;font-size:14px;line-height:1.6;max-width:440px}
.footer-columns{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));column-gap:clamp(24px,3.2vw,64px);row-gap:32px;padding-top:42px}
.footer-group{min-width:0}
.footer-group h2{font-size:13px;font-weight:850;line-height:1.45;letter-spacing:.09em;color:#64decb;margin:0 0 22px;text-transform:uppercase}
.footer-group-links{display:flex;flex-direction:column;gap:15px}
.footer-group a{font-size:16px;line-height:1.4;color:#d4e0e9;transition:color .2s,transform .2s}
.footer-group a:hover{color:#74f4dc;transform:translateX(3px)}
.footer-bottom{padding-top:24px;padding-bottom:28px}
/* Featured knowledge clusters on the homepage */
.home-focus{padding:100px 0 107px;background:#fff}
.focus-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.focus-card{display:flex;flex-direction:column;min-width:0;position:relative;overflow:hidden;border:1px solid #d9e6e9;background:linear-gradient(140deg,#fff 55%,#f1faf8 100%);border-radius:18px;padding:clamp(25px,2.5vw,43px);box-shadow:0 6px 24px rgba(18,45,61,.045)}
.focus-card:nth-child(2){background:linear-gradient(140deg,#fff 55%,#f0f5fc 100%)}
.focus-card:nth-child(3){background:linear-gradient(140deg,#fff 55%,#f4faf5 100%)}
.focus-card:nth-child(4){background:linear-gradient(140deg,#fff 55%,#f8f5fa 100%)}
.focus-number{position:absolute;top:33px;right:35px;color:#adc1cb;font-weight:820;font-size:12px;letter-spacing:.13em}
.focus-kicker{color:#087c74;letter-spacing:.11em;font-size:12px;font-weight:900;padding-right:60px}
.focus-card h3{font-size:clamp(26px,2.5vw,40px);line-height:1.13;letter-spacing:-.05em;margin:16px 0 12px;max-width:710px}
.focus-card>p{font-size:16px;color:#5b7586;line-height:1.65;margin:0 0 25px;max-width:670px}
.focus-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px 12px;margin-top:auto;padding-bottom:24px}
.focus-links a{display:flex;align-items:center;justify-content:space-between;gap:9px;padding:13px 14px;border-radius:9px;border:1px solid #deebef;background:#fff;color:#284459;font-size:15px;font-weight:715;line-height:1.4;min-width:0}
.focus-links a .icon{width:16px;height:16px;color:#0ba596}
.focus-links a:hover{background:#eaf9f5;border-color:#b3dfd7;color:#097b74}
.focus-cta{display:inline-flex;align-items:center;gap:11px;font-size:15px;font-weight:850;color:#05786f;border-top:1px solid #e0eae9;padding-top:21px}
.focus-cta .icon{width:18px;height:18px}
/* Context navigation and thematic groups within sections */
.section-jumps{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;margin-bottom:-17px}
.section-jumps a{display:inline-flex;align-items:center;border:1px solid #c8dce3;border-radius:50px;background:#fff;padding:9px 18px;color:#31556a;font-size:15px;font-weight:780}
.section-jumps a:hover{border-color:#68cbbb;background:#e8f8f3;color:#006f6b}
#section-overview,#base-guides,#all-topics{scroll-margin-top:24px}
.topic-cluster-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}
.topic-cluster{border:1px solid #d8e6eb;border-radius:15px;overflow:hidden;background:#fff;min-width:0}
.topic-cluster h3{background:linear-gradient(115deg,#112a3f,#17434a);color:#fff;font-size:20px;line-height:1.32;letter-spacing:-.025em;margin:0;padding:21px 20px;min-height:98px;display:flex;align-items:center}
.topic-cluster-links{display:flex;flex-direction:column;padding:9px 15px 12px}
.cluster-link{display:block;position:relative;padding:17px 24px 17px 4px;border-bottom:1px solid #e5eef1;color:#263d50;min-width:0}
.cluster-link:last-child{border-bottom:0}
.cluster-link b{display:block;font-size:16px;line-height:1.3;letter-spacing:-.015em}
.cluster-link small{display:block;font-size:13px;line-height:1.5;color:#687d8b;margin-top:7px}
.cluster-link .icon{position:absolute;right:0;top:18px;width:15px;height:15px;color:#059f91}
.cluster-link:hover b{color:#087c75}
.side-card{max-height:min(78vh,850px);overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin}
.side-more{margin-top:10px;border-top:1px solid #e1e9ee}
.side-more summary{cursor:pointer;list-style:none;position:relative;padding:16px 12px;color:#183e52;font-size:15px;font-weight:850}
.side-more summary::-webkit-details-marker{display:none}
.side-more summary:after{content:'+';position:absolute;right:10px;top:13px;color:#0c9388;font-size:22px;font-weight:600}
.side-more[open] summary:after{content:'−'}
.side-more summary span{display:block;font-size:12px;font-weight:590;color:#7c90a0;margin-top:3px}
.side-more[open] summary{background:#f0f9f7}
.side-more .side-item{font-size:14px;padding:12px 9px}
/* Responsiveness: fit readable columns to viewport, not device diagonal */
@media(max-width:1350px){
 .footer-identity{flex-wrap:wrap;gap:14px 30px}
 .footer-mission{max-width:none;flex-basis:100%}
 .focus-card h3{font-size:30px}
 .focus-links a{font-size:14px;padding:12px}
 .topic-cluster-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:1050px){
 .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:40px}
 .focus-grid{grid-template-columns:1fr}
 .focus-links{grid-template-columns:repeat(2,minmax(0,1fr))}
 .home-focus{padding:72px 0}
 .side-card{max-height:none;overflow:visible}
}
@media(max-width:880px){
 .side-column{order:2;grid-row:auto;grid-template-columns:1fr}
 .main-stack{order:1}
 .side-help{display:none}
 .section-jumps{margin-bottom:0}
 .topic-cluster-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:600px){
 .footer-content{padding-top:40px;padding-bottom:45px}
 .footer-identity{display:grid;gap:12px;padding-bottom:24px}
 .footer-identity .footer-logo{font-size:25px}
 .footer-mission{font-size:13px}
 .footer-columns{grid-template-columns:1fr;gap:32px;padding-top:31px}
 .footer-group h2{font-size:13px;margin-bottom:15px}
 .footer-group-links{gap:12px}
 .footer-group a{font-size:15px}
 .home-focus{padding:60px 0}
 .focus-card{padding:24px 20px}
 .focus-card h3{font-size:29px}
 .focus-links{grid-template-columns:1fr;gap:8px}
 .focus-links a{font-size:15px}
 .topic-cluster-grid{grid-template-columns:1fr}
 .topic-cluster h3{min-height:unset;padding:17px 19px}
 .section-jumps{gap:8px;margin-top:17px}
 .section-jumps a{font-size:13px;padding:8px 12px}
}

/* SEO-2.1: substantial landing navigation without removing the encyclopedia. */
#choose-test{scroll-margin-top:80px}
.seo-hub-section{padding:88px 0 96px;background:linear-gradient(125deg,#eff8f8 0%,#f8fafb 100%);border-bottom:1px solid #dce9ec}
.seo-hub-section .section-heading{margin-bottom:30px}
.seo-hub-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.seo-hub-card{display:flex;flex-direction:column;min-height:204px;padding:26px 28px;background:#fff;border:1px solid #dce9ed;border-radius:16px;box-shadow:0 12px 30px rgba(20,51,72,.05);transition:transform .15s,border-color .15s,box-shadow .15s;color:#122b40}
.seo-hub-card:hover{transform:translateY(-3px);border-color:#1bbda8;box-shadow:0 17px 32px rgba(20,51,72,.1)}
.seo-hub-top{color:#159d91;font-size:11px;letter-spacing:.11em;font-weight:900}
.seo-hub-card b{font-size:clamp(18px,1.5vw,23px);line-height:1.25;letter-spacing:-.03em;margin-top:10px}
.seo-hub-card small{font-size:15px;line-height:1.5;color:#5d7384;display:block;margin-top:10px}
.seo-hub-arrow{display:flex;align-items:center;gap:8px;color:#078e82;font-size:14px;font-weight:850;margin-top:auto;padding-top:14px}
.seo-hub-arrow .icon{height:17px;width:17px}
.seo-hub-note{margin-top:22px;background:#e3f3f1;border-left:3px solid #0cafa0;border-radius:6px;padding:17px 22px;color:#244e58;font-size:15px;line-height:1.55}
.pricing-wrap{max-width:100%;overflow-x:auto;margin:16px 0 30px;border:1px solid #dbe9ee;border-radius:12px;background:#fff}
.pricing-table{width:100%;border-collapse:collapse;min-width:650px;font-size:15px}
.pricing-table caption{text-align:left;padding:18px 18px 14px;color:#526b7b;line-height:1.5;font-size:13px}
.pricing-table th{background:#e9f6f4;text-align:left;font-weight:800;color:#173b4b}
.pricing-table td,.pricing-table th{padding:13px 15px;border-bottom:1px solid #e3edf0;vertical-align:top}
.pricing-table a{color:#087f74;text-decoration:underline;text-underline-offset:3px}
.pricing-table tr:last-child td{border-bottom:0}
.article-prose a{color:#07877d;text-decoration:underline;text-underline-offset:3px}
@media(max-width:1100px){.seo-hub-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:650px){.seo-hub-section{padding:55px 0}.seo-hub-grid{grid-template-columns:1fr;gap:11px}.seo-hub-card{min-height:156px;padding:21px 20px}.seo-hub-card b{font-size:20px}.seo-hub-card small{font-size:14px}}

/* SEO-2.2: demand-first navigation; scientific sections remain accessible via a real HTML submenu. */
.nav-grid{grid-template-columns:repeat(7,minmax(0,1fr));align-items:stretch}
.nav-dropdown{position:relative;min-width:0}
.nav-dropdown>summary{cursor:pointer;list-style:none;gap:9px;user-select:none}
.nav-dropdown>summary::-webkit-details-marker{display:none}
.nav-caret{color:#12897e;font-size:14px;transition:transform .16s}
.nav-dropdown[open] .nav-caret{transform:rotate(180deg)}
.nav-dropdown[open]>summary{color:#087a72;background:#f2fbf9}
.nav-mega{position:absolute;top:100%;right:0;z-index:50;width:min(490px,90vw);padding:13px;background:#fff;border:1px solid #d3e2e6;border-radius:0 0 16px 16px;box-shadow:0 22px 40px rgba(9,30,45,.18);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}
.nav-mega a{display:flex;align-items:center;min-height:48px;padding:10px 13px;border-radius:8px;color:#18334b;font-size:15px;font-weight:700;line-height:1.35}
.nav-mega a:hover,.nav-mega a:focus-visible{background:#e9f7f4;color:#00796e}
.mobile-encyclopedia>summary{padding:11px 6px;border-bottom:1px solid #263e50;color:#e2eff3;cursor:pointer;font-size:16px;font-weight:700}
.mobile-encyclopedia>div{display:grid;padding:7px 0 8px 17px;background:#162d41;border-radius:0 0 8px 8px}
.mobile-navigation .mobile-encyclopedia a{font-size:15px;font-weight:600;color:#c6e8e3;padding:10px 6px}
@media (min-width:881px) and (max-width:1210px){.nav-link{padding:12px 5px;font-size:13px}.nav-grid{gap:0}.nav-mega a{font-size:14px}}

/* Practical research first, broad knowledge second. */
.home-hero h1{font-size:clamp(55px,5.35vw,94px);line-height:1.05;letter-spacing:-.064em}
.seo-hub-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:17px}
.seo-hub-card{min-height:230px;padding:23px 24px}
.seo-hub-icon{width:40px;height:40px;display:grid;place-items:center;background:#edf9f7;color:#0a8b7f;border-radius:10px;margin-top:13px}
.seo-hub-icon .icon{width:24px;height:24px}
.seo-hub-card b{margin-top:12px;font-size:clamp(19px,1.4vw,23px)}
.home-answers{background:#fff;padding:78px 0 90px;border-bottom:1px solid #e1e9ed}
.home-answers-grid{display:grid;grid-template-columns:minmax(260px,.77fr) minmax(0,1.23fr);gap:clamp(35px,5vw,100px);align-items:start}
.home-answers-intro h2{font-size:clamp(34px,3vw,50px);line-height:1.13;letter-spacing:-.05em;margin:15px 0 20px}
.home-answers-intro p{color:#526c80;line-height:1.72;font-size:17px;margin-bottom:23px}
.home-faq-list{border-top:1px solid #d9e7eb}
.home-faq-item{border-bottom:1px solid #d9e7eb}
.home-faq-item>summary{padding:20px 42px 20px 2px;position:relative;list-style:none;cursor:pointer;font-weight:750;font-size:18px;line-height:1.35;color:#13354c}
.home-faq-item>summary::-webkit-details-marker{display:none}
.home-faq-item>summary:after{content:'+';position:absolute;right:8px;top:18px;color:#169689;font-size:26px;line-height:1}
.home-faq-item[open]>summary:after{content:'−'}
.home-faq-item>div{padding:0 18px 20px 2px;color:#536b7a;font-size:16px;line-height:1.6}
.home-faq-item p{margin:0 0 12px}
.home-faq-item a{color:#087d73;font-weight:800;display:inline-flex;gap:7px;align-items:center}
.home-faq-item a .icon{height:17px;width:17px}
.section-priorities{padding-top:24px}
.section-priority-head{margin-bottom:16px}
.section-priority-head h2{font-size:clamp(24px,2vw,32px);line-height:1.2;letter-spacing:-.04em;margin:8px 0 0}
.section-priority-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.section-priority-card{border:1px solid #cfdfdf;border-radius:14px;background:#fff;padding:20px 52px 20px 20px;position:relative;min-height:123px;display:flex;flex-direction:column;gap:6px}
.section-priority-card:hover{border-color:#54cbbd;background:#f8fdfb;box-shadow:0 8px 22px rgba(10,60,65,.06)}
.section-priority-card strong{font-size:19px;line-height:1.28;color:#14364d}
.section-priority-card span{font-size:14px;color:#687c8b;line-height:1.45}
.section-priority-card>.icon{position:absolute;top:23px;right:16px;width:20px;height:20px;color:#0c9285}
@media(max-width:1300px){.seo-hub-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:900px){.home-answers-grid{grid-template-columns:1fr;gap:20px}.home-answers{padding:60px 0}.section-priority-grid{grid-template-columns:1fr 1fr}.section-priority-card:last-child{grid-column:1/-1}}
@media(max-width:650px){.seo-hub-grid{grid-template-columns:1fr}.seo-hub-card{min-height:190px}.home-answers-intro h2{font-size:36px}.home-faq-item>summary{font-size:16px}.section-priority-grid{grid-template-columns:1fr}.section-priority-card:last-child{grid-column:auto}.section-priority-card{min-height:unset}.section-priorities{padding-top:18px}}

@media(max-width:600px){.home-hero h1{font-size:clamp(37px,10vw,44px);letter-spacing:-.047em;line-height:1.1}.hero-lead{font-size:17px}.home-hero-left{padding:50px 0 55px}}

/* SEO-2.5: editorial television information (not a video hosting mirror). */
.home-media-spotlight{padding:34px 0;background:#e8f4f4;border-top:1px solid #d3e4e5;border-bottom:1px solid #d3e4e5}
.media-spotlight-inner{display:flex;justify-content:space-between;align-items:center;gap:30px}
.media-spotlight-inner h2{font-size:clamp(25px,2.5vw,40px);letter-spacing:-.04em;margin:9px 0 8px}
.media-spotlight-inner p{color:#536b7e;line-height:1.6;max-width:910px;margin:0}
.media-spotlight-inner .button{flex-shrink:0}
.media-guide .media-official-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;margin:20px 0}
.media-official-links a{display:flex;gap:9px;align-items:center;justify-content:space-between;border:1px solid #cde1df;background:#eff9f7;border-radius:10px;padding:17px;color:#08645f;font-weight:770}
.media-official-links .icon,.episode-entry .icon,.library-media-link .icon{width:18px;height:18px;flex:none}
.media-schedule{overflow-x:auto;max-width:100%;margin:24px 0}
.episode-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px;margin:23px 0}
.episode-entry{background:#f4f9fa;border:1px solid #d7e7eb;border-radius:14px;padding:24px;min-width:0}
.episode-date{font-size:12px;color:#647b8b;font-weight:800}
.episode-entry h3{font-size:22px;line-height:1.3;margin:11px 0}
.episode-entry p{font-size:15px;line-height:1.6;color:#526b7c}
.episode-entry a,.library-media-link a{display:inline-flex;align-items:center;gap:8px;color:#087f79;font-weight:780}
.library-media-link{padding:27px;background:#eaf5f4;border:1px solid #cfe8e3;border-radius:14px;margin-top:28px}
.library-media-link h2{font-size:26px;margin:0 0 9px}.library-media-link p{margin:0 0 14px;line-height:1.6;color:#547082}
.media-toc{position:sticky;top:24px}
@media(max-width:900px){.media-spotlight-inner{flex-direction:column;align-items:flex-start}.media-spotlight-inner .button{flex-shrink:1}.media-toc{position:static}}
@media(max-width:600px){.media-guide .media-official-links,.episode-list{grid-template-columns:1fr}.episode-entry{padding:18px}.media-spotlight-inner .button{width:100%;justify-content:center}}

/* SEO-2.6: visible provenance/freshness notices, non-intrusive. */
.price-detail{display:block; margin-top:.38rem; font-size:.82em; color:#5b6f82; font-weight:400; line-height:1.4}
.data-freshness{margin-top:1.2rem; background:#eef6f8; border-left:4px solid #2caaa4; border-radius:0 10px 10px 0; padding:.9rem 1rem; font-size:.93rem; color:#354a5d; line-height:1.55}
.data-freshness[hidden]{display:none!important}
.data-freshness-expired{border-color:#cc7a29; background:#fff3e8; color:#7a3e12}

/* SEO-2.8: distinct factual pricing groups; proportional on desktops/mobile. */
.price-summary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:22px 0 15px}
.price-summary-card{min-width:0;background:linear-gradient(145deg,#f3faf9,#fff);border:1px solid #cde4e0;border-radius:15px;padding:22px 19px;display:flex;flex-direction:column;gap:9px}
.price-summary-card:nth-child(2){background:linear-gradient(145deg,#f2f7fc,#fff);border-color:#d7e3ed}
.price-summary-card:nth-child(3){background:linear-gradient(145deg,#f6f5fb,#fff);border-color:#dddbea}
.price-summary-kicker{color:#33566b;font-weight:800;font-size:14px;line-height:1.35}
.price-summary-value{font-size:clamp(21px,1.9vw,30px);font-weight:900;letter-spacing:-.035em;color:#0d695f;line-height:1.2}
.price-summary-card p{color:#4a6577;font-size:14px;line-height:1.55;margin:0}
.price-summary-card small{color:#617989;font-size:12px;line-height:1.55;margin-top:auto}
.price-summary-card a,.pricing-legal a{color:#087e74;text-decoration:underline;text-underline-offset:3px}
.pricing-disclaimer{border-left:4px solid #268b85;border-radius:0 10px 10px 0;background:#f1f8f8;padding:16px 18px;margin:12px 0 23px;line-height:1.6;font-size:15px}
.price-category{margin:22px 0 30px}
.price-category h3{font-size:clamp(20px,2vw,26px);line-height:1.3;margin:0 0 11px;letter-spacing:-.025em}
.pricing-legal{font-size:14px;line-height:1.65}
@media(max-width:1100px){.price-summary-grid{grid-template-columns:1fr}.price-summary-card{padding:18px;gap:7px}}
@media(max-width:600px){.price-category{margin:21px 0 27px}.price-summary-value{font-size:25px}.pricing-disclaimer{padding:13px 15px;font-size:14px}}

/* SEO-3.0: separate the date of a price quote from the price itself. */
.pricing-table .price-verified { display:block; margin-top:.45rem; font-size:.76rem; line-height:1.4; color:var(--muted, #667b88); font-weight:400; }