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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}

.header .nav-group,.header .nav-group:last-child{position:relative;border:0;padding:0}
.nav-group summary{display:flex;align-items:center;gap:7px;list-style:none;color:#e5eee8;font-size:.91rem;font-weight:600}
.nav-group summary::-webkit-details-marker{display:none}
.nav-group summary::after{content:"";width:6px;height:6px;border:solid currentColor;border-width:0 1.5px 1.5px 0;transform:translateY(-2px) rotate(45deg)}
.nav-group[open] summary::after{transform:translateY(1px) rotate(225deg)}
.nav-group summary:hover,.nav-group[open] summary{color:var(--green)}
.nav-menu{position:absolute;top:calc(100% + 10px);left:-12px;min-width:max-content;margin:0;padding:5px;list-style:none;background:#193c30;border:1px solid #6a8a79;border-radius:8px;box-shadow:0 12px 28px #071c1566}
.nav-group:last-child .nav-menu{right:-12px;left:auto}
.header .nav-menu a{display:block;padding:9px 12px;border-radius:4px}
.header .nav-menu a:hover,.header .nav-menu a:focus-visible{background:#274d3e}
.subsection{margin-top:34px;padding-top:22px;border-top:1px solid var(--line)}
.subsection>h3{font-size:clamp(1.35rem,2.7vw,2rem);margin-bottom:12px}
.subsection>p,.resource-list p{color:var(--muted)}
.subsection h3[id],#device-description{scroll-margin-top:108px}
.resource-list{padding-left:1.2em;margin:0}
.resource-list li+li{margin-top:8px}
.resource-list.compact li+li{margin-top:0}
.spec-list{max-width:820px;background:white;border:1px solid var(--line);border-radius:8px}
.spec-list div{display:grid;grid-template-columns:1fr 1.6fr;gap:12px;padding:11px 16px}
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@media(max-width:390px){.spec-list div{grid-template-columns:1fr;gap:2px}}
.brand img{display:block;object-fit:contain;border-radius:4px}
.signal-brand{display:flex;align-items:center;gap:15px;padding-bottom:13px;margin-bottom:13px;border-bottom:1px solid #71928466}
.signal-brand img{width:clamp(150px,60%,320px);max-width:100%;height:auto;border-radius:6px}
.signal-brand a{color:#e0eee6;font-size:.83rem;line-height:1.5;text-underline-offset:4px}
@media(max-width:690px){.brand img{width:42px;height:auto}}
@media(max-width:520px){.signal-brand{flex-direction:column;align-items:flex-start;gap:9px}.signal-brand img{width:100%}}

.featured-books{padding-block:clamp(38px,5vw,66px);background:#edf1e7;border-bottom:1px solid var(--line)}
.featured-books .eyebrow{margin-bottom:9px}
.featured-books h2{font-size:clamp(1.9rem,4vw,3.35rem)}
.book-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.book-card{display:grid;grid-template-columns:clamp(90px,12vw,160px) minmax(0,1fr);align-items:center;gap:clamp(13px,2.5vw,28px);padding:clamp(12px,2vw,23px);border:1px solid var(--line);border-radius:12px;background:white;text-decoration:none}
.book-card:hover{border-color:#739c7b;background:#fcfdf9}
.book-card img{display:block;width:100%;height:auto;border-radius:3px;box-shadow:0 4px 12px #17362b30}
.book-card h3{font-size:clamp(1.03rem,2.2vw,1.7rem);overflow-wrap:anywhere}
.book-card div>span{display:inline-block;margin-top:11px;color:#21523c;font-weight:700;text-decoration:underline;text-underline-offset:4px}
.learning-disclosure{margin:0 0 24px;padding:15px clamp(13px,3vw,25px);background:#f9fbf4;border:1px solid var(--line);border-radius:10px}
.learning-disclosure>summary{padding-block:4px}
.learning-jumps,.learning-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:13px}
.learning-jumps a{padding:6px 11px;border:1px solid #a8bda9;border-radius:6px;text-decoration:none;color:#21523c;font-weight:700}
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.learning-actions .textlink{margin-top:0}
.learning-disclosure .subsection{margin-top:23px;padding-top:16px}
.learning-disclosure .subsection:last-child{padding-bottom:8px}
@media(max-width:750px){.book-grid{grid-template-columns:1fr}}
@media(max-width:690px){.nav-group:nth-child(2) .nav-menu{left:50%;transform:translateX(-40%)}}
.author-note{display:grid;grid-template-columns:clamp(78px,12vw,137px) minmax(0,1fr);align-items:center;gap:clamp(15px,3vw,28px);margin-top:28px;padding:clamp(14px,3vw,27px);border:1px solid var(--line);border-radius:10px;background:#f9fbf4}
.author-document{display:block;align-self:center;border:1px solid var(--line);border-radius:4px;overflow:hidden}
.author-document img{display:block;width:100%;height:auto}
.author-note h3{font-size:clamp(1.35rem,2.5vw,2rem);margin-bottom:8px}
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.author-caption{font-size:.86rem;margin-top:9px}

.training-photo{margin:24px 0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#f9fbf4}
.training-photo img{display:block;width:100%;height:auto}
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.training-photo figcaption p{color:var(--muted);font-size:.91rem}
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.training-gallery{display:grid;grid-template-columns:1.25fr 1fr;gap:16px;margin:24px 0;align-items:start}
.training-gallery .training-photo{margin:0}
@media(max-width:750px){.training-gallery{grid-template-columns:1fr}}

/* Accessibility and narrow-screen refinements, November 2026 */
img{max-width:100%}.topic-content p+p{margin-top:1em}.topic-content>.order{grid-template-columns:minmax(0,1fr)}
.header nav>a,.nav-group>summary{min-height:44px;display:flex;align-items:center}
.nav-menu{max-width:calc(100vw - 34px);min-width:0;width:max-content}.header .nav-menu a{min-height:44px;white-space:normal}
:focus-visible{outline:3px solid #629b46;outline-offset:4px}
@media(max-width:690px){.header{gap:4px}.header nav{gap:0}.nav-group>summary{gap:5px}.header .btn-small{min-height:44px}.topic-content .price{min-width:0}.topic-content .price .btn{max-width:100%}.footer a:not(.brand){padding-block:8px}.resource-list a{display:inline-block;padding-block:6px}}
@media(max-width:340px){.header nav a,.nav-group summary{font-size:.79rem}.brand{font-size:1.2rem}.signal-head{flex-wrap:wrap}.actions .btn{width:100%}}