/* assets/reference-design.css */
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/* assets/reference-polish.css */
/* A measured 1440px / 390px refinement. No document zoom or scaled page containers. */
body.bt-ref-design{font-size:18px;line-height:1.75}body.bt-ref-design h1{line-height:1.15}body.bt-ref-design h2{font-size:34px;line-height:1.25}body.bt-ref-design h3{line-height:1.3}
body.bt-ref-design .ref-home-hero{grid-template-columns:minmax(0,52fr) minmax(0,48fr);gap:48px;min-height:560px;padding-block:28px}
body.bt-ref-design .ref-home-hero h1{font-size:60px;line-height:1.15;margin-bottom:22px}
body.bt-ref-design .ref-home-hero .ref-lead,body.bt-ref-design .ref-informational-intro{font-size:18px;line-height:1.75}
body.bt-ref-design .ref-informational-intro p{font-size:inherit;line-height:inherit;margin:0}
body.bt-ref-design .ref-home-hero .ref-hero-art{width:100%;max-width:none;height:450px;display:flex;align-items:center;justify-content:flex-start;direction:ltr;justify-self:stretch}
body.bt-ref-design .ref-home-hero .ref-hero-art img{width:640px;max-width:none;height:auto!important;flex-shrink:0}
body.bt-ref-design .ref-hero-copy{position:relative;z-index:1}
body.bt-ref-design .ref-line-icon{width:48px!important;height:48px!important;flex-shrink:0;color:#102637}
.ref-line-icon *{vector-effect:non-scaling-stroke}
body.bt-ref-design .ref-trust{gap:20px;padding-bottom:24px}
body.bt-ref-design .ref-trust>div{padding:24px;border-radius:18px;gap:24px;min-height:130px;box-shadow:0 8px 28px rgba(16,38,55,.07)}
body.bt-ref-design .ref-trust h3{font-size:22px!important;line-height:1.3;margin-bottom:8px}
body.bt-ref-design .ref-trust p{font-size:18px;line-height:1.65}
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body.bt-ref-design .ref-services>figure{position:relative;align-self:stretch;min-height:0}
body.bt-ref-design .ref-services>figure img{position:absolute;inset:0;width:100%;height:100%;min-height:0;max-height:none;object-fit:cover;object-position:62% center}
body.bt-ref-design .ref-services>div{min-width:0}
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body.bt-ref-design .ref-service-rows .ref-line-icon{width:56px!important;height:56px!important}
body.bt-ref-design .ref-service-rows h3{font-size:23px;line-height:1.3;margin-bottom:7px}
body.bt-ref-design .ref-service-rows p{font-size:17px;line-height:1.65}
body.bt-ref-design .ref-services .ref-muted{font-size:18px;margin-bottom:12px}
body.bt-ref-design .ref-about{background:#edf5fa;padding-block:64px}
body.bt-ref-design .ref-about .ref-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:48px}
body.bt-ref-design .ref-about figure img{width:100%;height:auto;max-height:none;object-fit:contain}
body.bt-ref-design .ref-about h2{font-size:34px;margin-bottom:18px}
body.bt-ref-design .ref-about p:not(.ref-eyebrow){font-size:18px;line-height:1.75}
body.bt-ref-design .ref-projects{padding-top:56px;padding-bottom:32px}
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body.bt-ref-design .ref-project-grid img{height:280px!important;object-fit:cover}
body.bt-ref-design .ref-project-grid>a:first-child img{object-position:55% center}
body.bt-ref-design .ref-project-grid>a:last-child img{object-position:64% center}
body.bt-ref-design .ref-project-grid figcaption{bottom:16px;right:16px;min-height:36px;padding:5px 20px;font-size:15px;line-height:1.65}
body.bt-ref-design .ref-home-process{padding-top:40px}
body.bt-ref-design .ref-service-hero{grid-template-columns:minmax(0,53fr) minmax(0,47fr);gap:48px;min-height:470px;padding-block:28px 24px}
body.bt-ref-design .ref-service-hero h1{font-size:52px!important;line-height:1.15;margin-bottom:20px}
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body.bt-ref-design .ref-service-hero .ref-hero-art img{width:608px;max-width:none;height:auto!important;flex-shrink:0}
body.bt-ref-design .ref-uses{display:block;padding-top:32px;padding-bottom:56px}
body.bt-ref-design .ref-uses-overview{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:48px}
body.bt-ref-design .ref-uses-overview figure{position:static}
body.bt-ref-design .ref-uses-overview figure img{height:320px;min-height:0;width:100%;object-fit:cover;object-position:center;border-radius:24px}
body.bt-ref-design .ref-uses .ref-prose{font-size:18px}
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body.bt-ref-design .ref-usage-card{grid-column:span 2;display:grid;grid-template-columns:56px minmax(0,1fr);column-gap:20px;align-content:start;padding:24px 0;border-top:1px solid #dee6ec}
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body.bt-ref-design .ref-usage-card h3{font-size:21px;margin:0 0 8px;line-height:1.4}
body.bt-ref-design .ref-usage-card h3 strong{font-weight:900}
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body.bt-ref-design .ref-usage-followup{max-width:940px;font-size:17px;margin-top:12px}
body.bt-ref-design .ref-preparation{background:#edf5fa;padding-block:72px}
body.bt-ref-design .ref-preparation-overview{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center}
body.bt-ref-design .ref-preparation-overview figure img{height:370px;min-height:0;width:100%;object-fit:cover;object-position:center;border-radius:24px}
body.bt-ref-design .ref-preparation-cards{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px 24px;margin-top:28px}
body.bt-ref-design .ref-preparation-cards>div{display:grid;grid-template-columns:48px minmax(0,1fr);column-gap:14px;align-content:start}
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body.bt-ref-design .ref-preparation-cards h3{font-size:19px;line-height:1.35;margin:0 0 6px}
body.bt-ref-design .ref-preparation-cards p{font-size:16px;line-height:1.65;margin:0!important}
body.bt-ref-design .ref-preparation-supplement{align-items:start;gap:40px;margin-top:40px;padding-top:32px;border-top:1px solid #cfdee9}
body.bt-ref-design .ref-dimensions-table{font-size:16px}
body.bt-ref-design .ref-dimensions-table table{font-size:16px;margin:18px 0}
body.bt-ref-design .ref-dimensions-table caption{font-size:18px;padding:0 0 12px}
body.bt-ref-design .ref-dimensions-table td,body.bt-ref-design .ref-dimensions-table th{padding:9px 12px}
body.bt-ref-design .ref-preparation-checklist{background:#fff;border:1px solid #d9e5ee;border-radius:18px;padding:26px;font-size:16px;line-height:1.75}
body.bt-ref-design .ref-preparation-checklist h2{font-size:23px;margin:0 0 16px}
body.bt-ref-design .ref-preparation-checklist p{font-size:16px;margin-bottom:14px!important}
body.bt-ref-design .ref-preparation-checklist ul{margin:0 0 18px;padding-right:20px}
body.bt-ref-design .ref-preparation-checklist li{margin-bottom:8px}
body.bt-ref-design .ref-preparation-checklist p:last-child{border-right:2px solid #f51f3d;padding-right:14px;margin-bottom:0!important}
body.bt-ref-design .ref-pricing{display:block;padding-block:72px}
body.bt-ref-design .ref-pricing>.ref-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:start}
body.bt-ref-design .ref-pricing-copy>h2{font-size:34px!important}
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body.bt-ref-design .ref-factors-table{width:100%;border-collapse:collapse;margin:0;font-size:17px;line-height:1.75;table-layout:fixed}
body.bt-ref-design .ref-factors-table thead th{background:#102637;color:white;font-size:16px;padding:14px 16px}
body.bt-ref-design .ref-factors-table th:first-child{width:30%}
body.bt-ref-design .ref-factors-table tbody th{background:white;color:#102637;padding:18px 16px;vertical-align:top;border-bottom:1px solid #dee6ec;font-size:17px;font-weight:700}
body.bt-ref-design .ref-factors-table td{padding:18px 16px;color:#435261;border-bottom:1px solid #dee6ec;vertical-align:top;font-size:17px}
body.bt-ref-design .ref-price-tools{padding-top:24px;margin-top:24px;border-top:1px solid #dee6ec}
body.bt-ref-design .ref-price-tools .bt-drilling-price-summary{display:grid;grid-template-columns:1fr 1fr;column-gap:40px;align-items:start}
body.bt-ref-design .ref-price-tools h2{grid-column:1;font-size:22px!important;margin-bottom:10px}
body.bt-ref-design .ref-price-tools .summary-unavailable{grid-column:1;grid-row:2;background:none;border:0;padding:0;font-size:16px;margin:0!important}
body.bt-ref-design .ref-price-tools .summary-actions{grid-column:2;grid-row:1/3;align-self:center;display:flex;gap:12px;flex-wrap:wrap;margin:0}
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body.bt-ref-design .ref-workflow{padding-block:16px 56px}
body.bt-ref-design .ref-workflow ol{gap:32px;margin-block:32px 24px}
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body.bt-ref-design .ref-workflow li strong{font-size:21px;line-height:1.4;margin-bottom:8px}
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body.bt-ref-design .ref-faq{padding-top:32px;padding-bottom:56px}
body.bt-ref-design .ref-faq summary{min-height:58px}
.screen-reader-text{position:absolute!important;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
@media(min-width:1024px){
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 body.bt-ref-design .ref-factors-table td{background:#fff}
}
@media(min-width:768px) and (max-width:1199px){
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}
@media(min-width:768px) and (max-width:1023px){
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 body.bt-ref-design .ref-trust>div{display:block;text-align:center}body.bt-ref-design .ref-trust .ref-line-icon{margin:0 auto 12px}
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}
@media(max-width:767px){
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 body.bt-ref-design .ref-home-hero .ref-hero-art,body.bt-ref-design .ref-service-hero .ref-hero-art{width:100%;height:auto;min-height:0;display:block;direction:rtl}
 body.bt-ref-design .ref-home-hero .ref-hero-art img,body.bt-ref-design .ref-service-hero .ref-hero-art img{width:100%;max-width:100%;max-height:none;height:auto!important}
 body.bt-ref-design .ref-hero-copy{z-index:auto}
 body.bt-ref-design .ref-trust{padding-block:16px 24px;gap:16px}
 body.bt-ref-design .ref-trust>div{display:flex;min-height:0;padding:24px;gap:22px;text-align:right}
 body.bt-ref-design .ref-trust h3{font-size:21px!important}body.bt-ref-design .ref-trust p{font-size:17px}
 body.bt-ref-design .ref-services{grid-template-columns:minmax(0,1fr);gap:24px;padding-block:16px 40px}
 body.bt-ref-design .ref-services>figure{position:relative;min-height:0;height:280px}
 body.bt-ref-design .ref-services>figure img{position:absolute;min-height:0;width:100%;height:100%;object-position:center}
 body.bt-ref-design .ref-service-rows>a{grid-template-columns:48px minmax(0,1fr) 32px;min-height:120px;gap:15px;padding-block:20px}
 body.bt-ref-design .ref-service-rows .ref-line-icon{width:48px!important;height:48px!important}body.bt-ref-design .ref-service-rows h3{font-size:21px}body.bt-ref-design .ref-service-rows p{font-size:17px}
 body.bt-ref-design .ref-about .ref-grid{grid-template-columns:minmax(0,1fr);gap:24px}body.bt-ref-design .ref-about h2{font-size:27px}body.bt-ref-design .ref-about p:not(.ref-eyebrow){font-size:17px}
 body.bt-ref-design .ref-about figure img{max-height:none;object-fit:contain}
 body.bt-ref-design .ref-project-grid{grid-template-columns:minmax(0,1fr);gap:20px}body.bt-ref-design .ref-project-grid img{height:240px!important}
 body.bt-ref-design .ref-projects{padding-bottom:20px}body.bt-ref-design .ref-home-process{padding-top:20px}
 body.bt-ref-design .ref-service-hero h1{font-size:34px!important;line-height:1.15;margin-bottom:18px}
 body.bt-ref-design .ref-service-hero .ref-anchor-nav{margin-top:24px;font-size:14px}
 body.bt-ref-design .ref-anchor-nav a{padding:13px 12px}body.bt-ref-design .ref-anchor-nav a:first-child{padding-right:4px}
 body.bt-ref-design .ref-uses-overview,body.bt-ref-design .ref-preparation-overview,body.bt-ref-design .ref-pricing>.ref-grid,body.bt-ref-design .ref-preparation-supplement{grid-template-columns:minmax(0,1fr);gap:24px}
 body.bt-ref-design .ref-uses .ref-prose{font-size:17px}
 body.bt-ref-design .ref-uses-overview figure{position:static}body.bt-ref-design .ref-uses-overview figure img{height:260px;min-height:0;object-fit:cover}
 body.bt-ref-design .ref-usage-cards{grid-template-columns:minmax(0,1fr);gap:0;margin-top:24px}
 body.bt-ref-design .ref-usage-card,body.bt-ref-design .ref-usage-card:nth-child(n+4){grid-column:auto;grid-template-columns:48px minmax(0,1fr);column-gap:18px;padding:22px 0}
 body.bt-ref-design .ref-usage-card h3{font-size:21px}body.bt-ref-design .ref-usage-card>div{font-size:17px}
 body.bt-ref-design .ref-service-tagline{font-size:16px;margin-top:16px}
 body.bt-ref-design .ref-preparation-cards{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:26px 20px;margin-top:26px}
 body.bt-ref-design .ref-preparation-cards>div{display:block}body.bt-ref-design .ref-preparation-cards .ref-line-icon{margin-bottom:10px}
 body.bt-ref-design .ref-preparation-cards h3{font-size:18px;line-height:1.4}body.bt-ref-design .ref-preparation-cards p{font-size:16px;line-height:1.7}
 body.bt-ref-design .ref-preparation-overview figure img{height:260px;min-height:0}
 body.bt-ref-design .ref-preparation-supplement{margin-top:28px;padding-top:24px}
 body.bt-ref-design .ref-preparation-checklist{padding:22px;font-size:17px}body.bt-ref-design .ref-preparation-checklist h2{font-size:23px}body.bt-ref-design .ref-preparation-checklist p{font-size:17px}
 body.bt-ref-design .ref-dimensions-table td,body.bt-ref-design .ref-dimensions-table th{padding:9px 8px}
 body.bt-ref-design .ref-pricing-copy>h2{font-size:27px!important}
 body.bt-ref-design .ref-factors-table{font-size:16px;table-layout:fixed}body.bt-ref-design .ref-factors-table th:first-child{width:31%}
 body.bt-ref-design .ref-factors-table thead th,body.bt-ref-design .ref-factors-table tbody th,body.bt-ref-design .ref-factors-table td{padding:12px 10px;font-size:16px;overflow-wrap:anywhere}
 body.bt-ref-design .ref-price-tools{padding-top:22px;margin-top:24px}body.bt-ref-design .ref-price-tools .bt-drilling-price-summary{display:block}body.bt-ref-design .ref-price-tools h2{font-size:22px!important}
 body.bt-ref-design .ref-price-tools .summary-actions{margin-top:20px}
 body.bt-ref-design .ref-workflow ol{grid-template-columns:minmax(0,1fr);gap:28px}
 body.bt-ref-design .ref-workflow li{font-size:17px;padding-right:64px}
 body.bt-ref-design .ref-workflow li:before{position:absolute;right:0;top:0;width:44px;height:44px}
 body.bt-ref-design .ref-workflow li:not(:last-child):after{right:21px;top:52px;width:1px;height:calc(100% - 22px)}
 body.bt-ref-design .ref-workflow li strong{font-size:21px}body.bt-ref-design .ref-workflow>p:last-child{font-size:17px;padding:18px}
 body.bt-ref-design .ref-faq summary{min-height:58px}
}

/* assets/reference-composition.css */
/* Section 1: home hero and benefit cards. Intrinsic image proportions are preserved. */
body.bt-ref-design .ref-home-hero{background:#eaf7fd;box-shadow:0 0 0 100vmax #eaf7fd;clip-path:inset(0 -100vmax)}
body.bt-ref-design .ref-home-hero h1{font-weight:900;letter-spacing:-1.4px;text-wrap:balance;max-inline-size:570px}
body.bt-ref-design .ref-home-hero .ref-lead{max-inline-size:540px}
body.bt-ref-design .ref-home-hero h1:after,body.bt-ref-design .ref-home-hero h1 span:after{content:none!important;display:none!important}
body.bt-ref-design h1 .ref-heading-tail{display:inline!important;white-space:nowrap}
body.bt-ref-design h1 .ref-heading-dot{display:inline-block!important;inline-size:.165em;block-size:.165em;margin-inline-start:.09em;background:#f51f3d;border-radius:50%;vertical-align:baseline;position:relative;top:-.025em}
body.bt-ref-design .ref-trust>div{gap:22px;box-shadow:0 9px 26px rgba(16,38,55,.065);border:1px solid #edf2f6}
body.bt-ref-design .ref-trust .ref-line-icon{width:64px!important;height:64px!important;stroke-width:1.9}
body.bt-ref-design .ref-trust h3{letter-spacing:-.2px;margin-bottom:7px}
@media(min-width:1024px){body.bt-ref-design .ref-home-hero{min-height:520px;padding-block:16px 24px}body.bt-ref-design .ref-trust{margin-top:-46px;position:relative;z-index:2}}
@media(min-width:1200px){body.bt-ref-design .ref-home-hero .ref-hero-art img{width:680px}body.bt-ref-design .ref-trust{margin-top:-34px}}
@media(max-width:767px){body.bt-ref-design .ref-home-hero h1{letter-spacing:-.6px;max-inline-size:100%}body.bt-ref-design .ref-home-hero .ref-lead{max-inline-size:100%}body.bt-ref-design .ref-trust{margin-top:0}body.bt-ref-design .ref-trust .ref-line-icon{width:56px!important;height:56px!important}body.bt-ref-design .ref-trust>div{gap:20px}}

/* Section 2: service list, optical icon scale, and the reference's opposite rounded corners. */
body.bt-ref-design .ref-services{row-gap:20px;column-gap:48px}
body.bt-ref-design .ref-services>.ref-services-copy{display:contents}
body.bt-ref-design .ref-services-heading{grid-row:1;grid-column:1/-1;margin-bottom:0}
body.bt-ref-design .ref-services-heading h2{margin-bottom:10px;letter-spacing:-.4px}
body.bt-ref-design .ref-services-heading p{margin-bottom:0}
body.bt-ref-design .ref-services>figure{grid-column:1;grid-row:2}
body.bt-ref-design .ref-service-rows{grid-column:2;grid-row:2}
body.bt-ref-design .ref-services>figure img{border-radius:0 96px 0 76px;object-position:50% center}
body.bt-ref-design .ref-service-rows>a{grid-template-columns:72px minmax(0,1fr) 40px;gap:22px;min-height:118px;padding-block:18px;align-items:center}
body.bt-ref-design .ref-service-rows .ref-line-icon{width:72px!important;height:72px!important;stroke-width:2}
body.bt-ref-design .ref-service-rows h3{font-weight:900;letter-spacing:-.2px;margin-bottom:6px}
body.bt-ref-design .ref-service-rows p{line-height:1.6}
body.bt-ref-design .ref-service-rows .ref-circle-arrow{width:40px;height:40px;border-color:#f51f3d}
@media(min-width:768px) and (max-width:1199px){body.bt-ref-design .ref-services{column-gap:30px}body.bt-ref-design .ref-service-rows>a{grid-template-columns:56px minmax(0,1fr) 34px;gap:14px}body.bt-ref-design .ref-service-rows .ref-line-icon{width:56px!important;height:56px!important}}
@media(max-width:767px){body.bt-ref-design .ref-services{row-gap:22px;grid-template-columns:minmax(0,1fr)}body.bt-ref-design .ref-services-heading{grid-column:1;grid-row:1}body.bt-ref-design .ref-service-rows{grid-column:1;grid-row:2}body.bt-ref-design .ref-services>figure{grid-column:1;grid-row:3}body.bt-ref-design .ref-services>figure img{border-radius:0 64px 0 54px}body.bt-ref-design .ref-service-rows>a{grid-template-columns:56px minmax(0,1fr) 34px;column-gap:16px;padding-block:20px}body.bt-ref-design .ref-service-rows .ref-line-icon{width:56px!important;height:56px!important}body.bt-ref-design .ref-service-rows h3{font-size:21px}}

/* Section 3: the original overlapping artwork, at its intended image/text proportion. */
body.bt-ref-design .ref-about{position:relative;isolation:isolate;overflow:hidden;background:linear-gradient(110deg,#e3eff7 0%,#edf5fa 68%);padding-block:50px}
body.bt-ref-design .ref-about>.ref-container{position:relative;z-index:1}
body.bt-ref-design .ref-about .ref-grid{grid-template-columns:minmax(0,44fr) minmax(0,56fr);gap:48px}
body.bt-ref-design .ref-about figure{width:100%;align-self:center}
body.bt-ref-design .ref-about figure img{width:100%;height:auto;max-height:none;object-fit:contain}
body.bt-ref-design .ref-about:before{content:'';position:absolute;z-index:0;left:calc(50% - 25px);bottom:-72px;width:180px;height:180px;border:25px solid rgba(166,195,215,.19);border-radius:50%;pointer-events:none}
body.bt-ref-design .ref-about h2{letter-spacing:-.35px;text-wrap:balance}
body.bt-ref-design .ref-about .ref-button{min-width:190px;justify-content:space-between;margin-top:14px}
@media(min-width:768px) and (max-width:1023px){body.bt-ref-design .ref-about .ref-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:30px}}
@media(max-width:767px){body.bt-ref-design .ref-about{padding-block:40px}body.bt-ref-design .ref-about .ref-grid{grid-template-columns:minmax(0,1fr);gap:28px}body.bt-ref-design .ref-about .ref-button{min-width:180px}body.bt-ref-design .ref-about:before{left:auto;right:-52px;bottom:-50px;width:150px;height:150px;border-width:20px}}

/* Section 4: full photo fields, with one consistent live HTML label over the supplied label area. */
body.bt-ref-design .ref-projects .ref-section-heading{margin-bottom:18px;align-items:center}
body.bt-ref-design .ref-projects h2{letter-spacing:-.35px;margin-bottom:8px!important}
body.bt-ref-design .ref-projects h2:before{margin-bottom:12px}
body.bt-ref-design .ref-projects .ref-section-heading p{margin:0;line-height:1.6}
body.bt-ref-design .ref-projects .ref-section-heading>a{margin-top:0}
body.bt-ref-design .ref-project-grid img,body.bt-ref-design .ref-project-grid>a:first-child img,body.bt-ref-design .ref-project-grid>a:last-child img{object-position:right bottom}
body.bt-ref-design .ref-project-grid figcaption{right:10px;bottom:8px;min-width:156px;height:48px;min-height:48px;display:flex;align-items:center;justify-content:center;padding:8px 16px;background:#0c2232;color:#fff;border:1px solid rgba(255,255,255,.8);border-radius:999px;font-size:15px;font-weight:700;line-height:1.4;text-align:center}
@media(max-width:767px){body.bt-ref-design .ref-projects .ref-section-heading{margin-bottom:20px}body.bt-ref-design .ref-projects .ref-section-heading>a{margin-top:14px}body.bt-ref-design .ref-project-grid figcaption{right:10px;bottom:8px;min-width:156px}}

/* Section 5: service introduction. The composite keeps its intrinsic aspect ratio. */
body.bt-ref-design .ref-service-hero h1{font-weight:900;letter-spacing:-.8px;text-wrap:balance}
body.bt-ref-design .ref-service-hero h1:after{content:none!important;display:none!important}
body.bt-ref-design .ref-service-hero .ref-lead{max-inline-size:570px}
body.bt-ref-design .ref-service-hero .ref-anchor-nav{border-color:#d5e0e9}
@media(min-width:1200px){body.bt-ref-design .ref-service-hero{grid-template-columns:minmax(0,48fr) minmax(0,52fr);padding-block:20px 24px;min-height:470px}body.bt-ref-design .ref-service-hero .ref-hero-art img{width:640px}}
@media(max-width:767px){body.bt-ref-design .ref-service-hero h1{letter-spacing:-.35px}}

/* Section 6: stronger usage icons and a coherent, centered desktop row. */
body.bt-ref-design .ref-usage-card{grid-template-columns:minmax(0,1fr);justify-items:center;text-align:center;row-gap:0;padding:24px 18px 18px}
body.bt-ref-design .ref-usage-card .ref-line-icon{grid-row:auto;width:64px!important;height:64px!important;stroke-width:1.9;margin:0 0 16px}
body.bt-ref-design .ref-usage-card h3{margin-bottom:8px;letter-spacing:-.15px}
body.bt-ref-design .ref-usage-card>div{max-inline-size:480px}
body.bt-ref-design .ref-usage-cards{row-gap:20px}
@media(max-width:767px){body.bt-ref-design .ref-usage-card,body.bt-ref-design .ref-usage-card:nth-child(n+4){grid-template-columns:56px minmax(0,1fr);text-align:right;justify-items:start;column-gap:20px;padding:24px 0}body.bt-ref-design .ref-usage-card .ref-line-icon{grid-row:span 2;width:56px!important;height:56px!important;margin:2px 0 0}}

/* Section 7: four preparation facts beside the photo; source details follow below. */
body.bt-ref-design .ref-preparation{padding-block:52px;background:#eaf3f9}
body.bt-ref-design .ref-preparation-cards{gap:30px 24px;margin-top:30px}
body.bt-ref-design .ref-preparation-cards>div{grid-template-columns:56px minmax(0,1fr);column-gap:18px}
body.bt-ref-design .ref-preparation-cards .ref-line-icon{width:56px!important;height:56px!important;stroke-width:1.9}
body.bt-ref-design .ref-preparation-overview figure img{height:360px;border-radius:16px;object-position:center}
body.bt-ref-design .ref-preparation-supplement{margin-top:40px;padding-top:32px;border-top-color:#cadde9}
body.bt-ref-design .ref-preparation-checklist{border-radius:14px;border-color:#d5e3ed;box-shadow:0 5px 18px rgba(16,38,55,.025)}
@media(max-width:767px){body.bt-ref-design .ref-preparation{padding-block:40px}body.bt-ref-design .ref-preparation-cards{gap:28px 20px}body.bt-ref-design .ref-preparation-overview figure img{height:260px}body.bt-ref-design .ref-preparation-supplement{margin-top:30px;padding-top:26px}}

/* Section 8: restrained table, information and accordion details. */
body.bt-ref-design .ref-factors-table{border-collapse:separate;border-spacing:0}
body.bt-ref-design .ref-factors-table thead th:first-child{border-radius:0 4px 0 0;border-left:1px solid #6b7e8c}
body.bt-ref-design .ref-factors-table thead th:last-child{border-radius:4px 0 0 0}
body.bt-ref-design .ref-factors-table tbody th,body.bt-ref-design .ref-factors-table td{padding-block:15px}
body.bt-ref-design .ref-pricing-copy>p:nth-of-type(3){border-radius:8px;padding:18px 22px;background:linear-gradient(100deg,#f4f8fb,#eaf2f8)}
body.bt-ref-design .ref-faq details{border:1px solid #cbd9e5;border-radius:12px;margin-bottom:10px;overflow:hidden;background:#fff}
body.bt-ref-design .ref-faq summary{padding:15px 20px;gap:20px;align-items:center}
body.bt-ref-design .ref-faq details[open]{border-color:#adbfce;box-shadow:0 3px 12px rgba(16,38,55,.035)}
body.bt-ref-design .ref-faq details>div{padding:0 20px 20px}
@media(max-width:767px){body.bt-ref-design .ref-faq summary{padding:14px 16px;gap:16px}body.bt-ref-design .ref-faq details>div{padding:0 16px 18px}}

/* assets/reference-footer.css */
/* Shared reference footer; home artwork uses the editable contact_image field. */

@media(min-width:1024px){body.bt-ref-design .ref-footer-grid:has(.ref-footer-navigation){grid-template-columns:1.1fr 1fr 1.15fr 1fr 1.1fr;gap:24px}body.bt-ref-design .ref-footer-grid:has(.ref-footer-navigation) .ref-footer-areas ul{grid-template-columns:1fr}body.bt-ref-design .ref-footer-grid:has(.ref-footer-navigation) li a{font-size:16px;line-height:1.6}}

@media(max-width:1023px){body.bt-ref-design .ref-footer-grid>.ref-footer-navigation{grid-column:1/-1}body.bt-ref-design .ref-footer-navigation ul{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 16px}}

/* The two navigation lists share one mobile row; brand and contact keep full width. */

@media(max-width:767px){

 body.bt-ref-design footer.ref-footer-new .ref-footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 18px}

 body.bt-ref-design footer.ref-footer-new .ref-footer-grid>.ref-footer-identity,body.bt-ref-design footer.ref-footer-new .ref-footer-grid>.ref-footer-contact{grid-column:1/-1}

 body.bt-ref-design footer.ref-footer-new .ref-footer-grid>div:nth-child(2){border-inline-end:1px solid #31586d;border-bottom:0;padding-inline-end:14px;padding-bottom:0}

 body.bt-ref-design footer.ref-footer-new .ref-footer-grid>.ref-footer-areas{border-bottom:0;padding-inline-start:10px;padding-bottom:0}

 body.bt-ref-design footer.ref-footer-new .ref-footer-areas ul{grid-template-columns:minmax(0,1fr)}

 body.bt-ref-design footer.ref-footer-new .ref-footer-grid>div:nth-child(2) h3,body.bt-ref-design footer.ref-footer-new .ref-footer-areas h3{font-size:20px!important}

 body.bt-ref-design footer.ref-footer-new .ref-footer-grid>.ref-footer-contact{border-top:1px solid #31586d;padding-top:24px}

}

body.bt-ref-design .ref-contact-new{padding-block:14px 34px}

body.bt-ref-design .ref-contact-panel{padding:30px 38px 24px;border-radius:26px;background:radial-gradient(ellipse at 28% 35%,#e3f4fc,#eaf7ff 70%,#e6f5ff);overflow:hidden}

body.bt-ref-design .ref-contact-upper{display:grid;grid-template-columns:minmax(0,59fr) minmax(0,41fr);align-items:center;gap:28px}

body.bt-ref-design .ref-contact-copy{min-width:0}

body.bt-ref-design .ref-contact-eyebrow{display:flex;gap:18px;align-items:center;font-size:19px;font-weight:700;color:#ff1838;margin:0 0 10px}

body.bt-ref-design .ref-contact-eyebrow:before{content:'';width:48px;height:2px;background:#ff1838}

body.bt-ref-design .ref-contact-copy h2{font-size:48px;line-height:1.2;letter-spacing:-1.05px;margin:0 0 12px}

body.bt-ref-design .ref-contact-description{font-size:23px;line-height:1.5;color:#102637;margin:0}

body.bt-ref-design .ref-contact-copy .ref-actions{margin-top:28px;gap:12px}

body.bt-ref-design .ref-contact-copy .ref-button{min-height:58px;padding:12px 25px;font-size:19px;gap:20px}

body.bt-ref-design .ref-contact-copy .ref-button.primary{background:linear-gradient(110deg,#ff2442,#ff1235);border-color:#ff1838}

body.bt-ref-design .ref-contact-phone{background:#ffffffb5;color:#102637;font-weight:700;font-size:21px!important}

body.bt-ref-design .ref-contact-phone svg{width:24px;height:24px;color:#ff1838;flex-shrink:0}

body.bt-ref-design .ref-contact-illustration{position:relative;isolation:isolate;display:grid;place-items:center;margin:0;min-width:0}

body.bt-ref-design .ref-contact-illustration:before{content:'';position:absolute;z-index:-1;width:75%;aspect-ratio:1;border-radius:50%;background:#d6edf8;opacity:.75;top:0;left:18%}

body.bt-ref-design .ref-contact-illustration img{width:100%;height:auto;max-height:300px;object-fit:contain;position:relative}

body.bt-ref-design .ref-contact-feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));padding:22px 0 0;margin:22px 0 0;list-style:none;border-top:1px solid #bfd9e9;gap:0}

body.bt-ref-design .ref-contact-feature-grid li{position:relative;display:flex;flex-direction:column;align-items:center;text-align:center;gap:4px;padding:0 16px;min-width:0}

body.bt-ref-design .ref-contact-feature-grid li:not(:last-child):after{content:'';position:absolute;left:0;top:7px;bottom:5px;width:1px;background:#b3ccdd}

body.bt-ref-design .ref-contact-feature-grid svg{width:40px!important;height:40px!important;flex-shrink:0;margin-bottom:3px}

body.bt-ref-design .ref-contact-feature-grid strong{font-size:19px;line-height:1.4;font-weight:700}

body.bt-ref-design .ref-contact-feature-grid span{font-size:15px;line-height:1.4;color:#435d70}

body.bt-ref-design .ref-footer-new{position:relative;isolation:isolate;overflow:hidden;background:radial-gradient(ellipse at 40% 30%,#10374e,#0b293e 80%);padding:44px 0 20px;color:#f7fbff}

body.bt-ref-design .ref-footer-concrete{position:absolute;z-index:-1;right:-20px;bottom:32px;width:590px;height:auto;color:#9bc1d5;opacity:.42;pointer-events:none}

body.bt-ref-design .ref-footer-new .ref-footer-grid{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr) minmax(0,1.05fr) minmax(0,1.15fr);gap:28px;align-items:stretch}

body.bt-ref-design .ref-footer-new .ref-footer-grid>div{min-width:0;padding-inline-end:26px;border-inline-end:1px solid #31586d}

body.bt-ref-design .ref-footer-new .ref-footer-grid>div:last-child{padding-inline-end:0;border:0}

body.bt-ref-design .ref-footer-new .ref-brand{width:220px;max-width:100%;margin-bottom:10px}

body.bt-ref-design .ref-footer-new .ref-brand .bt-art{filter:url(#ref-footer-logo-alpha)}

body.bt-ref-design .ref-footer-new .ref-footer-identity>p{font-size:16px;line-height:1.6;color:#f1f7fb!important;margin:0}

body.bt-ref-design .ref-footer-new h3{font-size:23px!important;line-height:1.3;color:#fff!important;margin:0 0 16px}

body.bt-ref-design .ref-footer-column h3:after{content:'';display:block;width:38px;height:3px;background:#ff2442;margin-top:8px}

body.bt-ref-design .ref-footer-new ul{margin:0;padding:0;list-style:none}

body.bt-ref-design .ref-footer-new li{font-size:17px;line-height:1.55;margin-bottom:6px;color:#f1f7fb}

body.bt-ref-design .ref-footer-new li>a{font-size:17px;line-height:1.55;color:#f1f7fb!important;margin:0}

body.bt-ref-design .ref-footer-areas ul{display:grid;grid-template-columns:1fr 1fr;column-gap:18px}

body.bt-ref-design .ref-footer-new .ref-footer-contact>a,body.bt-ref-design .ref-footer-new .ref-footer-hours{display:flex;align-items:center;gap:12px;margin:0 0 10px;font-size:17px;line-height:1.5;color:#f1f7fb!important}

body.bt-ref-design .ref-footer-contact svg{width:22px;height:22px;flex-shrink:0}

body.bt-ref-design .ref-footer-new .ref-footer-phone{font-size:21px!important;font-weight:700}

body.bt-ref-design .ref-footer-phone svg{color:#ff2442}

body.bt-ref-design .ref-footer-email span{overflow-wrap:anywhere}

body.bt-ref-design .ref-footer-hours>span{font-size:16px}

body.bt-ref-design .ref-footer-new .ref-footer-whatsapp{justify-content:center;border:1px solid #f1f7fb;border-radius:99px;min-height:40px;font-size:15px!important;padding:6px 12px;gap:10px}

body.bt-ref-design .ref-footer-new .ref-footer-address{font-size:13px;line-height:1.5;margin:0;color:#b9d1df!important}

body.bt-ref-design .ref-footer-new .ref-footer-coverage{display:flex;align-items:center;flex-wrap:wrap;gap:10px 22px;margin-top:22px;padding-top:18px;border-top:1px solid #31586d;color:#c3d8e6}

body.bt-ref-design .ref-footer-new .ref-footer-coverage h3{font-size:15px!important;font-weight:700;margin:0;color:#dcecf6!important}

body.bt-ref-design .ref-footer-new .ref-footer-coverage>span{font-size:13px}

body.bt-ref-design .ref-footer-new .ref-footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:24px;border-top:1px solid #31586d;margin-top:18px;padding-top:16px;font-size:13px;color:#f1f7fb}

body.bt-ref-design .ref-footer-bottom nav{display:flex;align-items:center;gap:0;flex-wrap:wrap}

body.bt-ref-design .ref-footer-bottom nav>*{font-size:13px;line-height:1.5;margin:0!important;padding-inline:16px;color:#f1f7fb!important}

body.bt-ref-design .ref-footer-bottom nav>*+*{border-inline-start:1px solid #8caabb}

body.bt-ref-design .ref-footer-new a:hover{color:#fff!important;text-decoration:underline;text-underline-offset:4px}

@media(min-width:768px) and (max-width:1199px){body.bt-ref-design .ref-contact-panel{padding:28px}body.bt-ref-design .ref-contact-upper{grid-template-columns:minmax(0,60fr) minmax(0,40fr);gap:24px}body.bt-ref-design .ref-contact-copy h2{font-size:38px!important}body.bt-ref-design .ref-contact-description{font-size:20px}body.bt-ref-design .ref-contact-copy .ref-button{font-size:17px;padding-inline:20px}body.bt-ref-design .ref-footer-new .ref-footer-grid{grid-template-columns:1fr 1fr;gap:30px 38px}body.bt-ref-design .ref-footer-new .ref-footer-grid>div:nth-child(2){border:0;padding-inline-end:0}body.bt-ref-design .ref-footer-new .ref-brand{width:220px}}

@media(max-width:767px){body.bt-ref-design .ref-contact-new{padding-block:4px 28px}body.bt-ref-design .ref-contact-panel{padding:26px 22px 24px;border-radius:22px}body.bt-ref-design .ref-contact-upper{grid-template-columns:minmax(0,1fr);gap:26px}body.bt-ref-design .ref-contact-eyebrow{font-size:16px;gap:12px;margin-bottom:12px}body.bt-ref-design .ref-contact-eyebrow:before{width:32px}body.bt-ref-design .ref-contact-copy h2{font-size:32px!important;letter-spacing:-.5px;margin-bottom:14px}body.bt-ref-design .ref-contact-description{font-size:18px;line-height:1.7}body.bt-ref-design .ref-contact-copy .ref-actions{margin-top:22px;display:grid;grid-template-columns:minmax(0,1fr);gap:12px}body.bt-ref-design .ref-contact-copy .ref-button{width:100%;font-size:17px;padding-inline:16px;min-height:52px}body.bt-ref-design .ref-contact-phone{font-size:20px!important}body.bt-ref-design .ref-contact-illustration{max-width:390px;margin-inline:auto;width:100%}body.bt-ref-design .ref-contact-illustration img{max-height:260px}body.bt-ref-design .ref-contact-feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 0;padding-top:24px;margin-top:24px}body.bt-ref-design .ref-contact-feature-grid li{padding-inline:10px}body.bt-ref-design .ref-contact-feature-grid li:nth-child(2n):after{display:none}body.bt-ref-design .ref-contact-feature-grid strong{font-size:17px}body.bt-ref-design .ref-contact-feature-grid span{font-size:14px}body.bt-ref-design .ref-footer-new{padding-block:36px 22px}body.bt-ref-design .ref-footer-new .ref-footer-grid{grid-template-columns:minmax(0,1fr);gap:26px}body.bt-ref-design .ref-footer-new .ref-footer-grid>div{padding:0 0 24px;border:0;border-bottom:1px solid #31586d}body.bt-ref-design .ref-footer-new .ref-footer-grid>div:last-child{padding-bottom:0}body.bt-ref-design .ref-footer-new .ref-brand{width:220px}body.bt-ref-design .ref-footer-new .ref-footer-identity>p{max-width:380px;font-size:16px}body.bt-ref-design .ref-footer-new h3{font-size:23px!important;margin-bottom:16px}body.bt-ref-design .ref-footer-areas ul{max-width:350px}body.bt-ref-design .ref-footer-new .ref-footer-whatsapp{max-width:300px}body.bt-ref-design .ref-footer-concrete{width:460px;right:-140px;bottom:100px;opacity:.22}body.bt-ref-design .ref-footer-new .ref-footer-coverage{gap:10px 18px;margin-top:24px;padding-top:20px}body.bt-ref-design .ref-footer-new .ref-footer-coverage h3{width:100%}body.bt-ref-design .ref-footer-new .ref-footer-bottom{align-items:flex-start;flex-direction:column;gap:16px;font-size:12px;line-height:1.7}body.bt-ref-design .ref-footer-bottom nav>*{padding-inline:12px}body.bt-ref-design .ref-footer-bottom nav>*:first-child{padding-inline-start:0}}



/* Existing live link groups in the approved footer, including mobile pairs. */

@media(min-width:1024px){body.bt-ref-design footer.ref-footer-new .ref-footer-grid:has(.ref-footer-navigation){grid-template-columns:1.05fr .95fr 1.15fr 1fr 1.15fr;gap:24px}body.bt-ref-design footer.ref-footer-new .ref-footer-grid:has(.ref-footer-navigation)>div{padding-inline-end:18px}body.bt-ref-design footer.ref-footer-new .ref-footer-grid:has(.ref-footer-navigation)>div:last-child{padding-inline-end:0}body.bt-ref-design footer.ref-footer-new .ref-footer-grid:has(.ref-footer-navigation) .ref-footer-areas ul{grid-template-columns:1fr}}

@media(max-width:767px){body.bt-ref-design footer.ref-footer-new .ref-footer-grid:has(.ref-footer-navigation){grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 18px}body.bt-ref-design footer.ref-footer-new .ref-footer-grid:has(.ref-footer-navigation)>.ref-footer-identity,body.bt-ref-design footer.ref-footer-new .ref-footer-grid:has(.ref-footer-navigation)>.ref-footer-navigation,body.bt-ref-design footer.ref-footer-new .ref-footer-grid:has(.ref-footer-navigation)>.ref-footer-contact{grid-column:1/-1}}



body.bt-ref-design #pojo-a11y-toolbar .pojo-a11y-toolbar-overlay{overflow:hidden}body.bt-ref-design #pojo-a11y-toolbar ul.pojo-a11y-toolbar-items,body.bt-ref-design #pojo-a11y-toolbar li.pojo-a11y-toolbar-item{display:block}body.bt-ref-design .ref-footer-column ul a{font-weight:400}



/* Centered footer brand panel, shared by every reference page. */

body.bt-ref-design footer.ref-footer-new .ref-footer-identity{text-align:center;display:flex;flex-direction:column;align-items:center;min-width:0}

body.bt-ref-design footer.ref-footer-new .ref-footer-identity .ref-brand{margin-inline:auto;width:100%;max-width:250px;display:block}

body.bt-ref-design footer.ref-footer-new .ref-footer-identity .ref-brand img{width:100%;height:auto;object-fit:contain}

body.bt-ref-design footer.ref-footer-new .ref-footer-identity>p{margin:22px auto 0;text-align:center;max-width:290px;font-size:18px;line-height:1.65;color:#bdd9e9}

body.bt-ref-design footer.ref-footer-new .ref-footer-identity .ref-footer-motto{margin:24px auto 0;color:#fff;font-size:23px;line-height:1.35;font-weight:800;text-align:center}

body.bt-ref-design footer.ref-footer-new .ref-footer-motto:before{content:'';display:block;width:48px;height:3px;background:#ff173b;margin:0 auto 18px}

body.bt-ref-design footer.ref-footer-new .ref-footer-identity .ref-footer-about{display:inline-flex;align-items:center;justify-content:center;gap:12px;margin-top:24px;color:#bdd9e9;font-size:17px;line-height:1.6;text-decoration:none}

body.bt-ref-design footer.ref-footer-new .ref-footer-about:hover{color:#fff;text-decoration:underline}

body.bt-ref-design footer.ref-footer-new .ref-footer-about:focus-visible{outline:2px solid #fff;outline-offset:5px}

@media(max-width:767px){body.bt-ref-design footer.ref-footer-new .ref-footer-identity .ref-brand{max-width:260px}body.bt-ref-design footer.ref-footer-new .ref-footer-identity{padding-block:6px 30px!important}}


/* assets/reference-header.css */
/* Approved navigation only; saved menu destinations and brand asset are unchanged. */
body.bt-ref-design .ref-topbar{display:none}
body.bt-ref-design .ref-header{border-top:6px solid #102637;border-bottom:2px solid #e1f0fb;background:#fff;backdrop-filter:none}
body.bt-ref-design .ref-header-row{height:84px;display:grid;grid-template-columns:180px minmax(0,1fr) 190px;gap:24px;align-items:center}
body.bt-ref-design .ref-header .ref-brand{width:160px;max-width:100%;margin:0}
body.bt-ref-design .ref-header #reference-nav{justify-self:center;min-width:0}
body.bt-ref-design .ref-header nav>ul{display:flex;align-items:center;gap:6px;white-space:nowrap;font-size:20px;font-weight:700}
body.bt-ref-design .ref-header nav>ul>li{position:relative;display:flex;align-items:center}
body.bt-ref-design .ref-header nav>ul>li>a{position:relative;display:block;min-height:38px;padding:9px 13px;border:0;border-radius:8px;line-height:26px;color:#111;font-size:20px;font-weight:700;background:transparent}
body.bt-ref-design .ref-header nav>ul>li.current-menu-item>a,body.bt-ref-design .ref-header nav>ul>li.ref-menu-home>a{background:#fff0f3;color:#111;border:0}
body.bt-ref-design .ref-header nav>ul>li.current-menu-item>a:after,body.bt-ref-design .ref-header nav>ul>li.ref-menu-home>a:after{content:'';position:absolute;height:1px;bottom:0;inset-inline:14px;background:#ff203e}
body.bt-ref-design .ref-header nav>ul>li>a:hover{color:#111;background:#fff5f7}
body.bt-ref-design .ref-header .ref-header-cta{justify-self:end;min-height:46px;width:190px;padding:10px 18px;font-size:16px;gap:14px;background:#ff173b;border-color:#ff173b;border-radius:99px}
body.bt-ref-design .ref-header .ref-submenu-toggle{border:0;background:transparent;color:#111;width:20px;height:36px;padding:2px;display:grid;place-items:center;cursor:pointer;flex-shrink:0;margin-inline-start:-6px}
body.bt-ref-design .ref-submenu-toggle svg{width:16px;height:16px}
body.bt-ref-design .ref-header nav .ref-services-submenu{display:none;top:100%;right:0;min-width:200px;white-space:normal;padding:10px;background:#fff;border:1px solid #dfebf3;border-radius:10px;box-shadow:0 10px 24px #10263712}
body.bt-ref-design .ref-header nav .ref-services-submenu.is-open{display:block}
body.bt-ref-design .ref-header nav .sub-menu a{padding:10px 12px;border-radius:6px;font-size:18px;line-height:1.5;color:#111}
body.bt-ref-design .ref-header nav .sub-menu a:hover{background:#fff0f3;color:#111}
@media(min-width:1024px) and (max-width:1199px){body.bt-ref-design .ref-header-row{grid-template-columns:150px minmax(0,1fr) 176px;gap:14px}body.bt-ref-design .ref-header .ref-brand{width:145px}body.bt-ref-design .ref-header nav>ul{gap:2px}body.bt-ref-design .ref-header nav>ul>li>a{padding-inline:8px;font-size:18px}body.bt-ref-design .ref-header .ref-header-cta{width:176px;font-size:15px}}
@media(max-width:1023px){body.bt-ref-design .ref-header-row{height:76px;grid-template-columns:minmax(0,1fr) auto;gap:18px}body.bt-ref-design .ref-header .ref-brand{width:156px}body.bt-ref-design .ref-header .ref-header-cta{display:none}body.bt-ref-design .ref-header .ref-menu-toggle{display:block;margin:0;padding:10px}body.bt-ref-design .ref-header #reference-nav{display:none;position:absolute;top:100%;right:0;width:100%;padding:16px 24px;max-height:calc(100dvh - 90px);overflow-y:auto;background:#fff;border-bottom:1px solid #dcebf5;box-shadow:0 12px 24px #10263712}body.bt-ref-design .ref-header #reference-nav.is-open{display:block}body.bt-ref-design .ref-header nav>ul{display:block;white-space:normal}body.bt-ref-design .ref-header nav>ul>li{display:flex;flex-wrap:wrap;margin-bottom:4px}body.bt-ref-design .ref-header nav>ul>li>a{padding:12px 14px;font-size:20px;line-height:28px;flex:1}body.bt-ref-design .ref-header .ref-submenu-toggle{width:44px;height:44px;margin:0}body.bt-ref-design .ref-header nav .ref-services-submenu{position:static;width:100%;flex-basis:100%;min-width:0;border:0;box-shadow:none;padding:6px 18px;margin:4px 0 8px;border-right:2px solid #e0eef8;border-radius:0}body.bt-ref-design .ref-header nav .sub-menu a{font-size:18px}}
@media(max-width:767px){body.bt-ref-design .ref-header-row{height:72px}body.bt-ref-design .ref-header .ref-brand{width:150px}}

/* Preserve all original navigation links in the new header. */
@media(min-width:1280px){body.bt-ref-design .ref-header .ref-container{width:calc(100% - 48px);max-width:1460px}body.bt-ref-design .ref-header-row{grid-template-columns:170px minmax(0,1fr) 168px;gap:18px}body.bt-ref-design .ref-header .ref-brand{width:165px}body.bt-ref-design .ref-header .ref-header-cta{width:168px;font-size:14px;padding-inline:12px}body.bt-ref-design .ref-header nav>ul{gap:0}body.bt-ref-design .ref-header nav>ul>li>a{font-size:19px;padding-inline:6px}body.bt-ref-design .ref-header .ref-submenu-toggle{width:22px}}
@media(min-width:1280px) and (max-width:1399px){body.bt-ref-design .ref-header nav>ul>li>a{font-size:18px;padding-inline:4px}body.bt-ref-design .ref-header .ref-submenu-toggle{width:18px}}
@media(max-width:1279px){body.bt-ref-design .ref-header-row{height:76px;grid-template-columns:minmax(0,1fr) auto;gap:18px}body.bt-ref-design .ref-header .ref-brand{width:156px}body.bt-ref-design .ref-header .ref-header-cta{display:none}body.bt-ref-design .ref-header .ref-menu-toggle{display:block;margin:0;padding:10px}body.bt-ref-design .ref-header #reference-nav{display:none;position:absolute;top:100%;right:0;width:100%;padding:16px 24px;max-height:calc(100dvh - 90px);overflow-y:auto;background:#fff;border-bottom:1px solid #dcebf5;box-shadow:0 12px 24px #10263712}body.bt-ref-design .ref-header #reference-nav.is-open{display:block}body.bt-ref-design .ref-header nav>ul{display:block;white-space:normal}body.bt-ref-design .ref-header nav>ul>li{display:flex;flex-wrap:wrap;margin-bottom:4px}body.bt-ref-design .ref-header nav>ul>li>a{padding:12px 14px;font-size:20px;line-height:28px;flex:1}body.bt-ref-design .ref-header .ref-submenu-toggle{width:44px;height:44px;margin:0}body.bt-ref-design .ref-header nav .ref-services-submenu{position:static;width:100%;flex-basis:100%;min-width:0;border:0;box-shadow:none;padding:6px 18px;margin:4px 0 8px;border-right:2px solid #e0eef8;border-radius:0}body.bt-ref-design .ref-header nav .sub-menu a{font-size:18px}}

body.bt-ref-design .ref-header .ref-brand>img.brand-image{width:100%;height:auto;max-height:70px;object-fit:contain;filter:none}

/* Spacious original navigation and the approved two-column flyout. */
@media(min-width:1280px){body.bt-ref-design .ref-header nav>ul{gap:12px}body.bt-ref-design .ref-header nav>ul>li>a{padding-inline:8px}body.bt-ref-design .ref-header nav .ref-native-submenu{padding:18px;border:1px solid #cce3f4;border-radius:12px;background:#fff;box-shadow:0 16px 40px #1026371c;top:calc(100% + 10px);min-width:250px}body.bt-ref-design .ref-header nav .ref-native-submenu:before{content:"";position:absolute;top:-16px;left:0;right:0;height:16px}body.bt-ref-design .ref-header nav .ref-native-submenu.ref-submenu-wide{width:500px;min-width:500px;right:50%;left:auto;transform:translateX(50%)}body.bt-ref-design .ref-header nav .ref-native-submenu.ref-submenu-wide.is-open{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:auto repeat(var(--submenu-rows),auto);grid-auto-flow:column;column-gap:24px;row-gap:0}body.bt-ref-design .ref-header nav .ref-native-submenu.ref-submenu-wide:after{content:"";position:absolute;top:70px;bottom:20px;right:50%;width:1px;background:#e4eff7;pointer-events:none}body.bt-ref-design .ref-header nav .ref-native-submenu .ref-submenu-heading{grid-column:1/-1;border-bottom:1px solid #e2eef7;margin-bottom:12px;padding:0 0 12px 8px;color:#7291ab;text-align:right;font-size:15px;font-weight:700;line-height:1.4}body.bt-ref-design .ref-header nav .ref-native-submenu a{position:relative;padding:9px 14px;min-height:42px;border-radius:7px;font-size:18px;line-height:1.45;color:#18364b;font-weight:700;white-space:normal}body.bt-ref-design .ref-header nav .ref-native-submenu a:hover,body.bt-ref-design .ref-header nav .ref-native-submenu a:focus-visible,body.bt-ref-design .ref-header nav .ref-native-submenu .current-menu-item>a{background:#edf8ff;color:#18364b}body.bt-ref-design .ref-header nav .ref-native-submenu a:hover:before,body.bt-ref-design .ref-header nav .ref-native-submenu a:focus-visible:before,body.bt-ref-design .ref-header nav .ref-native-submenu .current-menu-item>a:before{content:"";position:absolute;right:0;top:4px;bottom:4px;width:4px;border-radius:4px;background:#ff1744}}
@media(min-width:1280px) and (max-width:1399px){body.bt-ref-design .ref-header .ref-container{width:calc(100% - 32px)}body.bt-ref-design .ref-header-row{grid-template-columns:145px minmax(0,1fr) 156px;gap:12px}body.bt-ref-design .ref-header .ref-brand{width:145px}body.bt-ref-design .ref-header .ref-header-cta{width:156px}body.bt-ref-design .ref-header nav>ul{gap:8px}body.bt-ref-design .ref-header nav>ul>li>a{padding-inline:5px;font-size:18px}}
@media(max-width:1279px){body.bt-ref-design .ref-header nav .ref-native-submenu{transform:none;max-width:100%;min-width:0}body.bt-ref-design .ref-header nav .ref-submenu-heading{padding:8px 12px;color:#7291ab;font-size:15px;font-weight:700;border-bottom:1px solid #e2eef7;margin-bottom:5px}body.bt-ref-design .ref-header nav .ref-native-submenu a{padding:10px 12px;border-radius:7px}body.bt-ref-design .ref-header nav .ref-native-submenu a:hover,body.bt-ref-design .ref-header nav .ref-native-submenu a:focus-visible{background:#edf8ff;box-shadow:inset -4px 0 #ff1744}}

/* Optical size of the approved outlined wordmark. */
@media(min-width:1400px){body.bt-ref-design .ref-header-row{grid-template-columns:200px minmax(0,1fr) 168px}body.bt-ref-design .ref-header .ref-brand{width:190px}}@media(min-width:1280px) and (max-width:1399px){body.bt-ref-design .ref-header-row{grid-template-columns:175px minmax(0,1fr) 156px}body.bt-ref-design .ref-header .ref-brand{width:170px}}@media(max-width:1279px){body.bt-ref-design .ref-header .ref-brand{width:190px}}

/* Shared dropdown typography: centered brand-red section labels and larger links. */
body.bt-ref-design .ref-header nav .ref-native-submenu .ref-submenu-heading{
    color:#ff1744;text-align:center;font-size:18px;line-height:1.5;padding:0 0 12px;
}
body.bt-ref-design .ref-header nav .sub-menu a,
body.bt-ref-design .ref-header nav .ref-native-submenu a{
    font-size:20px;line-height:1.5;
}
@media(max-width:1279px){
    body.bt-ref-design .ref-header nav .ref-native-submenu .ref-submenu-heading{padding:10px 12px;text-align:center;}
}