/* Knowledge Hub and editorial articles — consistent with Blue Tree's existing site. */
.btt-knowledge{
  --kh-navy:#051638;--kh-blue:#0a3291;--kh-sky:#32b3e8;--kh-orange:#ff9300;
  --kh-wash:#f2f8fc;--kh-border:#cce4f1;--kh-ink:#102849;--kh-muted:#40566c;
  font:400 16px/1.7 'Poppins',Arial,sans-serif;color:var(--kh-ink);background:#fff;
}
.btt-knowledge *{box-sizing:border-box}
.btt-knowledge a{color:#0a58a1;text-underline-offset:3px}
.btt-knowledge a:focus-visible,.btt-knowledge summary:focus-visible{outline:3px solid var(--kh-orange);outline-offset:3px}
.btt-knowledge p{margin:0 0 18px}
.btt-knowledge h1,.btt-knowledge h2,.btt-knowledge h3{font-family:'Poppins',Arial,sans-serif;line-height:1.25;letter-spacing:-.025em}
.btt-knowledge h2{color:var(--kh-navy);font-size:clamp(27px,3vw,38px);margin:0 0 17px;font-weight:700}
.btt-knowledge h3{color:var(--kh-navy);font-size:20px;margin:0 0 13px;font-weight:700}
.btt-knowledge .kh-container{max-width:1200px;margin:0 auto;padding:0 28px}
.btt-knowledge .kh-eyebrow{display:block;color:var(--kh-blue);font:700 13px/1.4 'Poppins',Arial,sans-serif;letter-spacing:.14em;text-transform:uppercase;margin:0 0 18px}
.btt-knowledge .kh-hero{
  background:linear-gradient(122deg,#04153a 5%,#0a3291 100%);color:white;
  padding:76px 0 82px;position:relative;overflow:hidden;isolation:isolate;
}
/* Match the subtle image watermark used on Blue Tree's existing page banners. */
.btt-knowledge .kh-hero::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.17;
  filter:blur(6px);
  clip-path:inset(0);
  background:url('/assets/octane/0cc3e231c61e-bluetreetechnologycom_723832321.png') center/cover no-repeat;
}
.btt-knowledge .kh-hero:after{
  content:"";position:absolute;inset:-110px -10% auto 48%;height:520px;
  background:radial-gradient(ellipse,rgba(50,179,232,.22),transparent 70%);
  pointer-events:none;z-index:-1
}
.btt-knowledge .kh-hero .kh-eyebrow{color:var(--kh-sky)}
.btt-knowledge .kh-hero h1{color:white;font-size:clamp(38px,5vw,60px);font-weight:700;margin:0 0 23px;max-width:970px}
.btt-knowledge .kh-hero .kh-lead{font-size:clamp(18px,1.75vw,22px);line-height:1.55;color:#edf7ff;max-width:760px;margin:0 0 21px}
.btt-knowledge .kh-hero .kh-subline{color:#cfdeec;max-width:740px;font-size:15px}
.btt-knowledge .kh-hero-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(275px,.72fr);align-items:center;gap:70px}
.btt-knowledge .kh-hero-feature{padding:30px 29px;border-radius:8px;background:rgba(255,255,255,.095);border:1px solid rgba(255,255,255,.26);backdrop-filter:blur(5px)}
.btt-knowledge .kh-hero-feature .kh-eyebrow{color:#aee9ff;font-size:12px}
.btt-knowledge .kh-hero-feature h2{color:#fff;font-size:23px;margin:0 0 15px}
.btt-knowledge .kh-hero-feature p{color:#dceaf7;font-size:14px;line-height:1.7}
.btt-knowledge .kh-hero-feature a{color:#fff;font-weight:700;text-decoration:none;border-bottom:2px solid var(--kh-orange);display:inline-block;padding-bottom:5px}
.btt-knowledge .kh-actions{display:flex;align-items:center;flex-wrap:wrap;gap:15px 24px;margin-top:27px}
.btt-knowledge .kh-btn{display:inline-block;padding:13px 23px;background:var(--kh-orange);border:2px solid var(--kh-orange);border-radius:5px;text-decoration:none!important;color:var(--kh-navy)!important;font:700 15px/1.4 Arial,sans-serif;transition:background-color .15s,border-color .15s}
.btt-knowledge .kh-btn:hover{background:#ffb446;border-color:#ffb446}
.btt-knowledge .kh-hero .kh-secondary-link{color:white;text-decoration:none;font-weight:600;border-bottom:2px solid var(--kh-sky);padding-bottom:4px}
.btt-knowledge .kh-breadcrumb{font-size:14px;color:#d2e2f2;margin-bottom:32px}
.btt-knowledge .kh-breadcrumb a{color:#fff;text-decoration:underline}
.btt-knowledge .kh-review-date{font-size:13px;color:#d4e3f0;margin:27px 0 0}
.btt-knowledge .kh-nav{display:flex;justify-content:center;align-items:center;gap:12px 34px;flex-wrap:wrap;padding:17px 24px;background:#fff;border-bottom:1px solid #dce7ef}
.btt-knowledge .kh-nav a{color:var(--kh-navy);font:600 14px/1.5 'Poppins',Arial,sans-serif;text-decoration:none}
.btt-knowledge .kh-nav a:hover{text-decoration:underline}
.btt-knowledge .kh-section{padding:74px 0}
.btt-knowledge .kh-section--wash{background:var(--kh-wash)}
.btt-knowledge .kh-section-intro{max-width:800px;margin:0 0 28px}
.btt-knowledge .kh-section-intro .kh-eyebrow{margin-bottom:12px}
.btt-knowledge .kh-section-intro>p{color:var(--kh-muted);font-size:17px}
.btt-knowledge .kh-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px}
.btt-knowledge .kh-card{display:flex;flex-direction:column;align-items:flex-start;background:#fff;border:1px solid var(--kh-border);border-top:4px solid var(--kh-sky);border-radius:8px;padding:27px 26px;box-shadow:0 8px 24px rgba(5,22,56,.07);min-width:0}
.btt-knowledge .kh-card .kh-tag{font:700 12px/1.4 'Poppins',Arial,sans-serif;text-transform:uppercase;letter-spacing:.08em;color:var(--kh-blue);margin:0 0 15px}
.btt-knowledge .kh-card h3 a{color:var(--kh-navy);text-decoration:none}
.btt-knowledge .kh-card h3 a:hover{text-decoration:underline}
.btt-knowledge .kh-card p:not(.kh-tag){font-size:15px;line-height:1.7;color:var(--kh-muted);flex:1}
.btt-knowledge .kh-card .kh-card-link{margin-top:6px;font:700 14px/1.5 Arial,sans-serif;text-decoration:none;color:var(--kh-blue);border-bottom:2px solid var(--kh-orange);padding-bottom:5px}
.btt-knowledge .kh-info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:25px}
.btt-knowledge .kh-panel{padding:30px 32px;background:#fff;border:1px solid #d6e6f0;border-radius:8px;min-width:0}
.btt-knowledge .kh-panel h3{font-size:22px}
.btt-knowledge .kh-panel p:last-child,.btt-knowledge .kh-panel ol:last-child{margin-bottom:0}
.btt-knowledge .kh-panel li{margin-bottom:8px}
.btt-knowledge .kh-panel a{font-weight:600}
.btt-knowledge .kh-note{padding:13px 17px;border-left:3px solid var(--kh-sky);background:#f2f8fc;font-size:14px;color:var(--kh-muted);border-radius:3px}
.btt-knowledge .kh-panel .kh-note{margin:17px 0 0}
.btt-knowledge .kh-list{padding-left:22px}
.btt-knowledge .kh-faq{max-width:900px}
.btt-knowledge .kh-faq details{padding:17px 0;border-bottom:1px solid #d6e6f0}
.btt-knowledge .kh-faq summary{font-weight:600;cursor:pointer;color:var(--kh-navy)}
.btt-knowledge .kh-faq details p{padding:12px 8px 0;margin:0;color:var(--kh-muted)}
.btt-knowledge .kh-policy-links{display:flex;flex-wrap:wrap;gap:12px 25px}
.btt-knowledge .kh-band-cta{background:var(--kh-navy);color:white;padding:56px 0 64px}
.btt-knowledge .kh-band-cta h2{color:white}
.btt-knowledge .kh-band-cta p{color:#d9e6f3;max-width:730px}
.btt-knowledge .kh-band-cta .kh-container{display:flex;justify-content:space-between;align-items:center;gap:30px}
.btt-knowledge .kh-band-cta .kh-btn{white-space:nowrap}
.btt-knowledge .kh-article-grid{display:grid;grid-template-columns:minmax(0,820px) 270px;gap:55px;align-items:start;padding-top:65px;padding-bottom:85px}
.btt-knowledge .kh-article-body{min-width:0}
.btt-knowledge .kh-article-body section{margin-top:48px}
.btt-knowledge .kh-article-body section h2{font-size:clamp(25px,2.4vw,32px)}
.btt-knowledge .kh-article-body li{margin-bottom:13px;padding-left:3px}
.btt-knowledge .kh-article-body ol{padding-left:24px}
.btt-knowledge .kh-article-body code{background:#edf4fb;padding:2px 5px;border-radius:3px;font-size:.88em;overflow-wrap:anywhere}
.btt-knowledge .kh-answer{padding:30px 34px;background:var(--kh-wash);border-left:5px solid var(--kh-sky);border-radius:5px}
.btt-knowledge .kh-answer h2{font-size:24px!important;margin-bottom:12px}
.btt-knowledge .kh-answer p:last-child{margin:0}
.btt-knowledge .kh-guide-sidebar{border:1px solid #d6e6f0;border-top:4px solid var(--kh-sky);border-radius:7px;padding:23px 24px;position:sticky;top:26px}
.btt-knowledge .kh-guide-sidebar strong{color:var(--kh-navy);display:block;margin-bottom:16px}
.btt-knowledge .kh-guide-sidebar nav{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.btt-knowledge .kh-guide-sidebar nav a{font-size:14px;text-decoration:none;line-height:1.45}
.btt-knowledge .kh-guide-sidebar nav a:hover{text-decoration:underline}
.btt-knowledge .kh-guide-sidebar .kh-aside-cta{border-top:1px solid #dce6ef;margin-top:24px;padding-top:18px}
.btt-knowledge .kh-guide-sidebar .kh-aside-cta p{font-size:13px;color:var(--kh-muted)}
.btt-knowledge .kh-article-body .kh-sources{border-top:1px solid #d6e6f0;padding-top:24px;color:var(--kh-muted);font-size:14px}
.btt-knowledge .kh-sources h2{font-size:24px!important}
.btt-knowledge .kh-sources ul{padding-left:22px}
.btt-knowledge .kh-article-end-links{display:flex;gap:12px 24px;flex-wrap:wrap;margin-top:24px}
@media(max-width:1020px){
 .btt-knowledge .kh-hero-grid{gap:30px}
 .btt-knowledge .kh-article-grid{grid-template-columns:minmax(0,1fr) 225px;gap:30px}
}
@media(max-width:800px){
 .btt-knowledge .kh-hero-grid,.btt-knowledge .kh-info-grid,.btt-knowledge .kh-article-grid{grid-template-columns:minmax(0,1fr)}
 .btt-knowledge .kh-hero-feature{max-width:580px}
 .btt-knowledge .kh-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .btt-knowledge .kh-guide-sidebar{position:static;max-width:580px;grid-row:1}
 .btt-knowledge .kh-band-cta .kh-container{align-items:flex-start;flex-direction:column}
}
@media(max-width:570px){
 .btt-knowledge .kh-container{padding:0 20px}
 .btt-knowledge .kh-hero{padding:46px 0 56px}
 .btt-knowledge .kh-hero h1{font-size:clamp(33px,9vw,44px)}
 .btt-knowledge .kh-hero-feature{padding:25px 22px}
 .btt-knowledge .kh-section{padding:48px 0}
 .btt-knowledge .kh-card-grid{grid-template-columns:1fr}
 .btt-knowledge .kh-card,.btt-knowledge .kh-panel{padding:24px 21px}
 .btt-knowledge .kh-nav{justify-content:flex-start;gap:11px 18px}
 .btt-knowledge .kh-article-grid{padding-top:39px;padding-bottom:55px}
 .btt-knowledge .kh-answer{padding:23px 22px}
}
@media(prefers-reduced-motion:reduce){
 .btt-knowledge .kh-btn{transition:none}
}

/* Additional educational Knowledge Hub guides and anchored table of contents. */
.btt-knowledge .kh-library{margin-top:65px;padding-top:55px;border-top:1px solid #cee1ef}
.btt-knowledge .kh-library .kh-section-intro{max-width:850px}
.btt-knowledge .kh-library-grid{align-items:stretch}
.btt-knowledge .kh-guide-sidebar .kh-aside-cta nav{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.btt-knowledge .kh-article-body h2[id],.btt-knowledge .kh-library[id]{scroll-margin-top:120px}
@media(max-width:570px){.btt-knowledge .kh-library{margin-top:43px;padding-top:41px}}

/* The editorial comparison tables use Blue Tree's Poppins and navy palette. */
.btt-knowledge .kh-table-wrap{width:100%;max-width:100%;overflow-x:auto;margin:18px 0 25px}
.btt-knowledge .kh-comparison{border-collapse:collapse;width:100%;min-width:590px;text-align:left;font-size:14px;line-height:1.6}
.btt-knowledge .kh-comparison th,.btt-knowledge .kh-comparison td{padding:13px 15px;border-bottom:1px solid #d9e6ef;vertical-align:top}
.btt-knowledge .kh-comparison thead th{background:#051638;color:#fff;font-weight:700}
.btt-knowledge .kh-comparison tbody th{color:#051638;width:22%;font-weight:600}
.btt-knowledge .kh-article-body ul{padding-left:24px}
.btt-knowledge .kh-article-body ul>li{margin:0 0 13px}
/* Featured carousel remains the same visual surface as the original branded feature. */
.btt-knowledge .kh-featured-rotator{display:flex;flex-direction:column;align-items:stretch;min-height:320px}
.btt-knowledge .kh-featured-rotator .kh-featured-content{flex:1;display:flex;flex-direction:column;align-items:flex-start}
.btt-knowledge .kh-featured-rotator .kh-featured-category{margin:0 0 10px;font-size:12px;line-height:1.45;color:#bcecff;text-transform:uppercase;letter-spacing:.09em;font-weight:700}
.btt-knowledge .kh-featured-rotator h2{font-size:clamp(21px,2.1vw,25px);line-height:1.33;letter-spacing:-.018em}
.btt-knowledge .kh-featured-rotator .kh-featured-content>p[data-kh-description]{flex:1;line-height:1.68}
.btt-knowledge .kh-featured-controls{display:flex;gap:10px;align-items:center;justify-content:flex-start;flex-wrap:wrap;padding-top:22px;margin-top:20px;border-top:1px solid rgba(255,255,255,.24)}
.btt-knowledge .kh-featured-controls button{appearance:none;border:1px solid rgba(255,255,255,.55);border-radius:5px;background:transparent;color:#fff;min-width:40px;min-height:40px;padding:7px 12px;font:600 15px/1.1 'Poppins',Arial,sans-serif;cursor:pointer}
.btt-knowledge .kh-featured-controls button:hover{background:rgba(255,255,255,.13);border-color:#fff}
.btt-knowledge .kh-featured-controls button:focus-visible{outline:3px solid #ff9300;outline-offset:3px}
.btt-knowledge .kh-featured-controls output{font:500 12px/1.3 'Poppins',Arial,sans-serif;color:#e2eef9;white-space:nowrap;min-width:49px;text-align:center}
.btt-knowledge .kh-featured-controls .kh-featured-toggle{margin-left:auto;min-width:69px;font-size:13px}
@media(max-width:800px){.btt-knowledge .kh-featured-rotator{min-height:0}}

/* Topic groups, Start here, and the phone reading layout. */
.btt-knowledge .kh-card .kh-tag,
.btt-knowledge .kh-card .kh-tag a{font-size:13px}
.btt-knowledge .kh-card .kh-tag a{color:inherit;text-decoration:none}
.btt-knowledge .kh-card .kh-tag a:hover{text-decoration:underline}
.btt-knowledge .kh-card .kh-card-link{font-size:15px}
.btt-knowledge .kh-topic-jumps{display:flex;flex-direction:column;gap:16px;margin:0 0 34px}
.btt-knowledge .kh-jump-door-name{display:inline-flex;align-items:center;min-height:44px;margin:0 0 6px;color:var(--kh-navy);font:700 14px/1.3 'Poppins',Arial,sans-serif;text-decoration:none}
.btt-knowledge .kh-jump-row{display:flex;flex-wrap:wrap;gap:8px}
.btt-knowledge .kh-jump-row a{display:inline-flex;align-items:center;min-height:44px;padding:8px 14px;border:1px solid var(--kh-border);border-radius:999px;background:#fff;color:var(--kh-navy);text-decoration:none;font:600 14px/1.3 'Poppins',Arial,sans-serif}
.btt-knowledge .kh-jump-row a:hover{border-color:var(--kh-sky)}
.btt-knowledge .kh-door{margin:8px 0 28px}
.btt-knowledge .kh-door>h2{font-size:clamp(26px,3vw,34px)}
.btt-knowledge .kh-topic{margin:0 0 28px;padding-top:8px}
.btt-knowledge .kh-topic h3{font-size:22px;margin:0 0 8px}
.btt-knowledge .kh-count{color:var(--kh-muted);font-size:14px;font-weight:600}
.btt-knowledge .kh-topic-intro{color:var(--kh-muted);margin:8px 0 16px}
.btt-knowledge .kh-also{margin:22px 0 12px;font-weight:700;color:var(--kh-navy)}
.btt-knowledge .kh-topic-mobile{display:none}
.btt-knowledge .kh-topic-titles{list-style:none;margin:8px 0 0;padding:0}
.btt-knowledge .kh-topic-titles a{display:flex;align-items:center;min-height:44px;padding:8px 0;font-size:16px;text-decoration:none}
.btt-knowledge .kh-start-here .kh-eyebrow{color:#aee9ff}
.btt-knowledge .kh-start-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.btt-knowledge .kh-start-list a{display:flex;flex-direction:column;justify-content:center;gap:2px;min-height:44px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.2);color:#fff;text-decoration:none;font-weight:600}
.btt-knowledge .kh-start-here a{border-bottom-color:rgba(255,255,255,.2)}
.btt-knowledge .kh-start-kicker{color:#bcecff;font:700 13px/1.3 'Poppins',Arial,sans-serif;letter-spacing:.04em;text-transform:uppercase}
.btt-knowledge .kh-start-title{font-size:16px;line-height:1.35}
.btt-knowledge .kh-start-list a:hover .kh-start-title{text-decoration:underline}
.btt-knowledge .kh-btn-sprout{background:transparent;color:#fff!important;border-color:#fff}
.btt-knowledge .kh-btn-sprout:hover{background:rgba(255,255,255,.12)}
.btt-knowledge .kh-more-topic{margin-top:36px}
.btt-knowledge .kh-more-topic ul{list-style:none;margin:0;padding:0}
.btt-knowledge .kh-more-topic a{display:flex;align-items:center;min-height:44px;font-size:16px}
.btt-knowledge .kh-sprout-box{margin-top:28px;padding:22px 24px;background:var(--kh-wash);border:1px solid var(--kh-border);border-left:5px solid var(--kh-sky);border-radius:8px}
.btt-knowledge .kh-sprout-box h2{font-size:24px}
.btt-knowledge .kh-sprout-side{margin:14px 0 0}
.btt-knowledge .kh-sprout-side a{font-size:15px;font-weight:700}
.btt-knowledge .kh-toc-mobile,.btt-knowledge .kh-sprout-side-mobile{display:none}
.btt-knowledge .kh-door,.btt-knowledge .kh-topic,.btt-knowledge #ask-sprout{scroll-margin-top:120px}
@media(max-width:800px){
 .btt-knowledge .kh-topic-desktop{display:none}
 .btt-knowledge .kh-topic-mobile{display:block;border-bottom:1px solid #d6e6f0}
 .btt-knowledge .kh-topic-mobile summary{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;padding:10px 0;cursor:pointer;color:var(--kh-navy);font-weight:700}
 .btt-knowledge .kh-topic-mobile summary::-webkit-details-marker{display:none}
 .btt-knowledge .kh-topic{margin:0;padding:0}
 .btt-knowledge .kh-toc-desktop{display:none}
 .btt-knowledge .kh-toc-mobile,.btt-knowledge .kh-sprout-side-mobile{display:block}
 .btt-knowledge .kh-guide-sidebar{padding:12px 14px}
 .btt-knowledge .kh-toc-mobile summary{display:flex;align-items:center;min-height:44px;font-weight:700;cursor:pointer}
 .btt-knowledge .kh-nav{flex-wrap:nowrap;justify-content:flex-start;overflow-x:auto;max-width:100%;gap:8px;padding:8px 16px}
 .btt-knowledge .kh-nav a,.btt-knowledge .kh-toc-mobile a,.btt-knowledge .kh-guide-sidebar a,.btt-knowledge .kh-sprout-side a{min-height:44px;display:flex;align-items:center;font-size:15px}
 .btt-knowledge .kh-nav a{flex:0 0 auto;padding:8px 12px}
 .btt-knowledge .kh-hero{padding:28px 0 32px}
 .btt-knowledge .kh-hero h1{font-size:28px;line-height:1.25}
 .btt-knowledge .kh-breadcrumb{margin-bottom:14px}
 .btt-knowledge .kh-hero .kh-lead{font-size:17px}
 .btt-knowledge .kh-review-date{margin-top:12px}
 .btt-knowledge .kh-door,.btt-knowledge .kh-topic,.btt-knowledge #ask-sprout{scroll-margin-top:12px}
 .btt-knowledge .kh-comparison{min-width:0;display:block}
 .btt-knowledge .kh-comparison thead{display:none}
 .btt-knowledge .kh-comparison tbody,.btt-knowledge .kh-comparison tr,.btt-knowledge .kh-comparison td,.btt-knowledge .kh-comparison tbody th{display:block;width:auto}
 .btt-knowledge .kh-comparison tr{border:1px solid #d9e6ef;border-radius:8px;margin:0 0 12px;padding:8px 12px;background:#fff}
 .btt-knowledge .kh-comparison td,.btt-knowledge .kh-comparison tbody th{border-bottom:0;padding:8px 0;overflow-wrap:anywhere}
 .btt-knowledge .kh-comparison td::before,.btt-knowledge .kh-comparison tbody th::before{content:attr(data-label);display:block;margin-bottom:2px;color:#051638;font-size:13px;font-weight:700}
}
@media print{
 .btt-knowledge .kh-topic-mobile,.btt-knowledge .kh-toc-mobile,.btt-knowledge .kh-sprout-side-mobile{display:none!important}
 .btt-knowledge .kh-topic-desktop,.btt-knowledge .kh-toc-desktop{display:block!important}
}