/* tastemaker: Split-Screen technical reference; mood: technical; palette: existing Glen Mills
 * nav N2 / footer Ft3 retained by user request; hero H2 equipment split with compact type
 * arc: chemistry > processing risk > mechanism comparison > test evidence > inquiry
 * contrast: ink/white 16.31; muted/white 4.98; white/navy 18.45; gold/navy 10.49
 * critique (1-5): representation 4, philosophy 4, hierarchy 4, specificity 5, restraint 5,
 * variety 4, harmony 5, tone 5, typography 4, spatial 4, preference 4; review pending
 */
.battery-pages{--battery-space:24px;--battery-border:#dce5eb;--battery-pale:#f3f7f9;--battery-navy:#081426;--battery-ink:#102133;--battery-muted:#627185;color:var(--battery-ink);font-size:16px;line-height:1.8}
.battery-pages *{box-sizing:border-box;min-width:0}
.battery-pages h1,.battery-pages h2,.battery-pages h3{text-wrap:balance;line-height:1.2}
.battery-pages h2{font-size:clamp(27px,3vw,38px);letter-spacing:-.8px;max-width:960px;margin:0 0 32px}
.battery-pages h3{font-size:22px;margin:0 0 14px;letter-spacing:-.3px}
.battery-pages p{margin:0 0 20px;max-width:78ch}
.battery-pages a{overflow-wrap:anywhere}
.battery-pages a:focus-visible,.battery-pages summary:focus-visible,.battery-pages input:focus-visible,.battery-pages select:focus-visible,.battery-pages textarea:focus-visible,.battery-table:focus-visible{outline:3px solid currentColor;outline-offset:5px}
.battery-pages section[id],.battery-pages div[id],.battery-pages details{scroll-margin-top:110px}
.battery-draft{background:var(--battery-pale);border-bottom:1px solid var(--battery-border);font-size:13px;line-height:1.6}
.battery-draft .container{display:flex;align-items:center;gap:20px;padding-top:12px;padding-bottom:12px}
.battery-draft strong{white-space:nowrap}
.battery-draft span{color:var(--battery-muted)}
.battery-hero{background:var(--battery-navy);color:white;padding:24px 0 72px}
.battery-hero .breadcrumbs{margin-bottom:42px;color:#fff;font-size:12px;flex-wrap:wrap;line-height:1.6}
.battery-hero .breadcrumbs a{color:inherit}
.battery-hero .breadcrumbs span[aria-hidden=true]{color:#fff}
.battery-hero-grid{display:grid;grid-template-columns:1.12fr 1fr;align-items:center;gap:64px}
.battery-label{font-size:12px!important;letter-spacing:1.8px;font-weight:700;line-height:1.6;margin-bottom:18px!important}
.battery-hero h1{font-size:clamp(34px,3.7vw,54px);line-height:1.1;letter-spacing:-1.5px;margin:0 0 24px;max-width:18ch}
.battery-hero .battery-lead{color:#fff;font-size:17px;line-height:1.8;max-width:57ch}
.battery-hero .actions{gap:12px;flex-wrap:wrap;display:flex;margin-top:32px}
.battery-pages .button{font-size:13px;letter-spacing:0;line-height:1.5;min-height:48px;white-space:normal;text-align:left;padding:14px 20px}
.battery-hero-figure{margin:0}
.battery-hero-figure>a{display:block;background:#fff;border-radius:6px;overflow:hidden}
.battery-hero-figure img{display:block;width:100%;height:auto;aspect-ratio:5/4;object-fit:contain;background:#fff;padding:16px}
.battery-hero-figure img[src*="battery-materials-"]{object-fit:cover;padding:0}
.battery-hero-figure figcaption{font-size:12px;line-height:1.7;color:#fff;margin-top:14px;max-width:65ch}
.battery-toc{border-bottom:1px solid var(--battery-border);background:#fff}
.battery-toc .container{display:flex;align-items:center;gap:16px 28px;flex-wrap:wrap;padding-top:18px;padding-bottom:18px;font-size:13px}
.battery-toc span{color:var(--battery-muted)}
.battery-toc a{font-weight:700;text-decoration:underline;text-underline-offset:5px;text-decoration-color:var(--battery-border)}
.battery-section{padding:88px 0}
.battery-tint{background:var(--battery-pale)}
.battery-section-intro{font-size:18px;line-height:1.8;margin-bottom:32px!important;max-width:75ch!important}
.battery-split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.battery-answer{font-size:20px;line-height:1.85;border-left:3px solid var(--battery-ink);padding-left:28px;max-width:900px}
.battery-answer p:last-child{margin-bottom:0}
.battery-facts{margin:0;border-top:1px solid var(--battery-border);font-size:15px}
.battery-facts>div{padding:16px 0;border-bottom:1px solid var(--battery-border)}
.battery-facts dt{font-weight:700;color:var(--battery-muted);font-size:12px;margin-bottom:6px}
.battery-facts dd{margin:0;overflow-wrap:anywhere}
.battery-group-links{display:flex;flex-wrap:wrap;gap:16px 32px;margin:32px 0 48px;font-size:14px;font-weight:700}
.battery-group-links a{text-decoration:underline;text-underline-offset:6px}
.battery-material-group{display:grid;grid-template-columns:1fr 2fr;gap:64px;border-top:1px solid var(--battery-border);padding:40px 0}
.battery-material-group:last-child{padding-bottom:0}
.battery-material-group>div p{font-size:15px;color:var(--battery-muted)}
.battery-material-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;column-gap:32px}
.battery-material-list li{border-bottom:1px solid var(--battery-border)}
.battery-material-list a{display:grid;grid-template-columns:1fr 20px;padding:16px 0;gap:2px 12px;line-height:1.5}
.battery-material-list strong{font-size:18px}
.battery-material-list a>span:first-of-type{grid-column:1;font-size:13px;color:var(--battery-muted)}
.battery-material-list a>span:last-child{grid-row:1/3;grid-column:2;align-self:center}
.battery-table{overflow-x:auto;border-top:1px solid var(--battery-border);margin-bottom:28px}
.battery-table table{width:100%;min-width:620px;border-collapse:collapse;text-align:left;font-size:15px;line-height:1.7}
.battery-table caption{text-align:left;font-weight:700;padding:18px 0;font-size:16px}
.battery-table th,.battery-table td{border-bottom:1px solid var(--battery-border);padding:20px;vertical-align:top;width:33.333%}
.battery-table thead{background:var(--battery-navy);color:#fff}
.battery-table tbody th{font-weight:700}
.battery-method-list{max-width:1000px}
.battery-method-list article{display:grid;grid-template-columns:60px 1fr;gap:24px;padding:28px 0;border-top:1px solid var(--battery-border)}
.battery-method-list article>span{font-size:32px;font-weight:300;color:var(--battery-muted);line-height:1.3}
.battery-equipment{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
.battery-equipment article{display:grid;grid-template-columns:180px 1fr;gap:24px;padding:24px;background:white;border:1px solid var(--battery-border);border-radius:6px;align-items:start}
.battery-equipment-photo{display:block;background:#fff}
.battery-equipment img{display:block;width:100%;height:auto;aspect-ratio:1;object-fit:contain}
.battery-equipment h3{font-size:19px;line-height:1.35}
.battery-equipment p{font-size:14px;line-height:1.8;margin-bottom:14px}
.battery-caption{font-size:13px!important;line-height:1.8!important;color:var(--battery-muted)}
.battery-note{font-size:14px;line-height:1.8;color:var(--battery-muted);margin-top:28px!important}
.battery-text-link{display:inline-flex;align-items:center;gap:12px;font-weight:700;font-size:14px;text-decoration:underline;text-underline-offset:5px}
.battery-inline-links{display:flex;flex-wrap:wrap;align-items:center;gap:20px 32px;margin-top:32px}
.battery-percentiles{border-top:1px solid var(--battery-border);border-bottom:1px solid var(--battery-border);margin:32px 0;padding:28px 0}
.battery-percentiles dl{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin:0 0 24px}
.battery-percentiles dt{font-size:36px;line-height:1.2;font-weight:300;font-variant-numeric:tabular-nums}
.battery-percentiles dt span{display:block;font-size:14px;font-weight:700;margin-top:10px}
.battery-percentiles dd{margin:8px 0 0;font-size:14px;color:var(--battery-muted)}
.battery-percentiles>p{font-size:13px;color:var(--battery-muted);margin-bottom:0}
.battery-process{display:grid;grid-template-columns:repeat(4,1fr);list-style:none;padding:0;margin:40px 0;gap:32px}
.battery-process li{border-top:2px solid var(--battery-ink);padding-top:20px}
.battery-process li>span{font-size:32px;line-height:1.2;font-weight:300;display:block;margin-bottom:22px;color:var(--battery-muted)}
.battery-process h3{font-size:21px}
.battery-process p{font-size:15px;line-height:1.8}
.battery-faq{max-width:960px}
.battery-faq details{border-top:1px solid var(--battery-border);padding:22px 0}
.battery-faq details:last-child{border-bottom:1px solid var(--battery-border)}
.battery-faq summary{font-size:18px;line-height:1.5;font-weight:700;cursor:pointer;padding-right:24px}
.battery-faq details p{font-size:16px;line-height:1.9;margin:20px 0 0;max-width:85ch}
.battery-related{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;list-style:none;margin:0;padding:0}
.battery-related li{border-top:1px solid var(--battery-border);border-bottom:1px solid var(--battery-border)}
.battery-related a{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding:24px 0}
.battery-related strong{font-size:20px;flex-basis:100%}
.battery-related span:not([aria-hidden]){font-size:14px;flex:1;color:var(--battery-muted)}
.battery-sources{max-width:940px}
.battery-sources>p{font-size:15px;line-height:1.8}
.battery-sources ul{padding-left:20px;line-height:1.8;margin:24px 0}
.battery-sources li{padding-bottom:10px;font-size:14px}
.battery-sources a{text-decoration:underline;text-underline-offset:3px}
.battery-inquiry-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:64px;align-items:start}
.battery-inquiry-grid>.form-card{padding:32px;border:1px solid var(--battery-border)}
.battery-inquiry-grid .form-card h3{font-size:24px;margin-bottom:28px}
.battery-inquiry-grid .form-card label{font-size:14px;line-height:1.6;color:var(--battery-ink)}
.battery-inquiry-grid .form-card input,.battery-inquiry-grid .form-card select,.battery-inquiry-grid .form-card textarea{font-size:16px;line-height:1.5;min-height:46px;color:var(--battery-ink);background:#fff;border-color:var(--battery-muted);padding:12px}
.battery-inquiry-grid .form-card .form-row{gap:20px}
.battery-form-details{margin:12px 0 24px;border-top:1px solid var(--battery-border);border-bottom:1px solid var(--battery-border);padding:18px 0}
.battery-form-details>summary{font-size:15px;font-weight:700;cursor:pointer;margin-bottom:8px}
.battery-form-details[open]>summary{margin-bottom:20px}
.battery-inquiry-grid .form-note,.battery-inquiry-grid [data-enquiry-status]{font-size:14px!important;line-height:1.8}
.battery-inquiry-grid .form-note{color:var(--battery-muted)}
.battery-inquiry-grid [data-error=true]{border-left:3px solid currentColor;padding-left:14px}
.battery-guide-list{max-width:1000px}
.battery-guide-list>a{display:grid;grid-template-columns:56px 1fr 24px;gap:24px;border-top:1px solid var(--battery-border);padding:28px 0}
.battery-guide-list>a:last-child{border-bottom:1px solid var(--battery-border)}
.battery-guide-list>a>span:first-child{font-size:32px;color:var(--battery-muted);font-weight:300;line-height:1.2}
.battery-guide-list p{font-size:15px;color:var(--battery-muted);margin:0}
.battery-reading{max-width:900px;font-size:17px;line-height:1.9}
.battery-brief{border-top:1px solid var(--battery-border);border-bottom:1px solid var(--battery-border);padding:28px 0;margin:24px 0 32px;max-width:1000px}
.battery-support{border-top:1px solid var(--battery-border);border-bottom:1px solid var(--battery-border);padding:24px 0;margin:32px 0}
.battery-support>summary{font-size:17px;font-weight:700;cursor:pointer;line-height:1.6}
.battery-support[open]>summary{margin-bottom:24px}
.battery-brief dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;margin:24px 0}
.battery-brief dt{font-weight:700;font-size:15px;line-height:1.6;margin-bottom:12px}
.battery-brief dd{font-size:15px;line-height:1.85;margin:0}
.battery-material-path{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px;padding:0;margin:32px 0}
.battery-material-path li{border-top:2px solid var(--battery-ink);padding-top:20px}
.battery-material-path strong{display:block;font-size:19px;line-height:1.4;margin-bottom:14px}
.battery-material-path span{display:block;font-size:15px;line-height:1.85}
@media(max-width:760px){.battery-brief dl,.battery-material-path{grid-template-columns:1fr;gap:24px}}
@media(hover:hover) and (pointer:fine){.battery-pages a:hover{text-decoration:underline;text-underline-offset:5px}.battery-material-list a:hover strong,.battery-related a:hover strong{text-decoration:underline;text-underline-offset:5px}}
@media(min-width:1500px){.battery-section{padding:96px 0}.battery-hero{padding-bottom:96px}}
@media(max-width:1100px){.battery-hero-grid{gap:40px}.battery-equipment article{grid-template-columns:1fr}.battery-equipment-photo{max-width:240px;margin:auto;width:100%}.battery-inquiry-grid,.battery-split,.battery-material-group{gap:40px}.battery-material-group{grid-template-columns:1fr 1.8fr}.battery-process{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.battery-pages{font-size:16px}.battery-draft .container{display:block}.battery-draft strong{display:block;margin-bottom:4px}.battery-hero{padding-top:18px;padding-bottom:40px}.battery-hero .breadcrumbs{margin-bottom:32px;font-size:11px}.battery-hero-grid,.battery-split,.battery-inquiry-grid,.battery-material-group{grid-template-columns:1fr;gap:32px}.battery-hero h1{font-size:36px;letter-spacing:-1px;max-width:25ch}.battery-hero .battery-lead{font-size:16px}.battery-hero-figure{max-width:540px;width:100%}.battery-hero-figure img{aspect-ratio:3/2;max-height:300px}.battery-hero .actions{margin-top:24px}.battery-section{padding:56px 0}.battery-pages h2{font-size:28px;margin-bottom:24px}.battery-toc .container{gap:12px 20px;font-size:12px}.battery-toc span{flex-basis:100%}.battery-answer{font-size:18px;padding-left:20px}.battery-material-group{padding:32px 0}.battery-material-list{column-gap:24px}.battery-material-list strong{font-size:17px}.battery-equipment{gap:24px}.battery-equipment article{padding:24px}.battery-equipment h3{font-size:18px}.battery-related{grid-template-columns:1fr;gap:16px}.battery-related a{padding:20px 0}.battery-inquiry-grid>.form-card{padding:24px}.battery-inquiry-grid .form-row{grid-template-columns:1fr}.battery-percentiles dl{gap:16px}.battery-percentiles dt{font-size:30px}.battery-percentiles dt span{font-size:13px}.battery-percentiles dd{font-size:12px}.battery-guide-list>a{grid-template-columns:32px 1fr 16px;gap:16px}.battery-guide-list h3{font-size:20px}.battery-process{gap:24px}.battery-process h3{font-size:19px}.battery-reading{font-size:16px}.battery-faq summary{font-size:17px}}
@media(max-width:480px){.battery-equipment{grid-template-columns:1fr}.battery-material-list{grid-template-columns:1fr}.battery-method-list article{grid-template-columns:32px 1fr;gap:16px}.battery-method-list article>span{font-size:26px}.battery-process{grid-template-columns:1fr}.battery-process li{display:grid;grid-template-columns:36px 1fr;gap:10px 16px}.battery-process li>span{grid-row:1/3;font-size:26px}.battery-process p{grid-column:2;margin:0}.battery-hero .actions .button{width:100%;justify-content:space-between}.battery-percentiles dl{grid-template-columns:1fr}.battery-percentiles dl>div{display:grid;grid-template-columns:1fr 1.2fr;align-items:center;gap:20px}.battery-percentiles dt{font-size:28px}.battery-percentiles dd{font-size:14px}.battery-percentiles dt span{display:inline;font-size:13px;margin-left:12px}}
@media(prefers-reduced-motion:reduce){.battery-pages *{scroll-behavior:auto;animation:none!important;transition:none!important}}