:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--ink:#19212f;--muted:#606b7a;--accent:#2459d9;--accent-hover:#1743ac;--canvas:#fff;--surface:#f5f7fa;--tint:#edf3ff;--line:#dce2e9;--radius:8px;--header-height:72px;color:var(--ink);background:var(--canvas);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 24px)}body{overflow-wrap:anywhere;margin:0;font-size:16px;line-height:1.8}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,summary,select{cursor:pointer}button{color:inherit}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}svg{vertical-align:middle;flex-shrink:0}h1,h2,h3,p,figure,dl,dd{margin:0}h1,h2,h3{letter-spacing:-.025em;overflow-wrap:anywhere;font-weight:700;line-height:1.55}h1{text-wrap:balance;font-size:clamp(30px,3.5vw,44px)}h2{font-size:clamp(24px,2.6vw,32px)}h3{font-size:19px}button:disabled,input:disabled{cursor:not-allowed}:focus-visible{outline:3px solid var(--accent);outline-offset:4px}::selection{color:var(--ink);background:#d7e4ff}.container{width:min(1120px,100% - 64px);margin-inline:auto}.sr-only,.skip-link:not(:focus){clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link:focus{z-index:100;background:var(--canvas);color:var(--accent);padding:12px 20px;position:fixed;top:12px;left:12px}.eyebrow{letter-spacing:.07em;color:var(--muted);font-size:12px;font-weight:600;line-height:1.7}.button{border:1px solid var(--accent);border-radius:var(--radius);background:var(--accent);color:#fff;justify-content:center;align-items:center;gap:20px;min-height:48px;padding:12px 24px;font-size:14px;font-weight:600;line-height:1.6;transition:background .16s,border-color .16s;display:inline-flex}.button:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.button-secondary{background:var(--canvas);color:var(--ink);border-color:var(--line)}.button-secondary:hover{background:var(--surface);border-color:#a5b1c1}.text-link{min-height:44px;color:var(--accent);align-items:center;gap:12px;font-size:14px;font-weight:600;display:inline-flex}.text-link svg{transition:transform .16s}.text-link:hover{text-underline-offset:4px;text-decoration:underline}.text-link:hover svg{transform:translate(3px)}button.text-link{text-align:left;background:0 0;border:0;padding:8px 0}.text-button{min-height:44px;color:var(--accent);text-underline-offset:4px;background:0 0;border:0;padding:8px 0;font-size:14px;text-decoration:underline}.section{padding-block:72px}.section-heading{justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:28px;display:flex}.section-heading>div{gap:8px;display:grid}.section-heading>p{color:var(--muted);max-width:32em;font-size:14px}.section-heading>.text-link{flex-shrink:0}.section-intro{color:var(--muted);margin-bottom:28px;font-size:14px}.section-note{color:var(--muted);margin-top:28px;font-size:13px}.disclosure-note{color:var(--muted);font-size:11px;line-height:1.8}.disclosure-note>span{border:1px solid var(--line);margin-right:5px;padding:1px 4px}.disclosure-note a{text-underline-offset:3px;margin-left:6px;text-decoration:underline}.breadcrumb{color:var(--muted);flex-wrap:wrap;gap:8px;padding-block:24px;font-size:12px;line-height:1.7;display:flex}.breadcrumb>span{gap:8px;min-width:0;display:inline-flex}.breadcrumb a:hover{color:var(--accent);text-decoration:underline}.page-heading{gap:12px;padding-block:20px 44px;display:grid}.page-heading>p:not(.eyebrow,.disclosure-note){max-width:46em;color:var(--muted);font-size:15px}.page-heading .disclosure-note{margin-top:4px}.empty-page{justify-items:start;gap:24px;padding-block:100px;display:grid}.site-header{z-index:40;background:var(--canvas);border-bottom:1px solid var(--line);position:sticky;top:0}.header-inner{min-height:var(--header-height);justify-content:space-between;align-items:center;gap:28px;display:flex}.brand{white-space:nowrap;letter-spacing:-.04em;align-items:center;gap:10px;font-size:17px;font-weight:700;line-height:1.4;display:inline-flex}.brand>svg{color:var(--accent);width:30px;height:30px}.brand-guide{font-weight:500}.navigation{align-self:stretch;align-items:stretch;gap:30px;display:flex}.navigation a{color:var(--muted);align-items:center;font-size:13px;display:inline-flex;position:relative}.navigation a:hover,.navigation a.is-active{color:var(--accent)}.navigation a.is-active:after{content:"";bottom:0;background:var(--accent);height:2px;position:absolute;inset-inline:0}.menu-toggle{display:none}.site-footer{background:var(--surface);border-top:1px solid var(--line);padding-block:44px 28px}.footer-main{justify-content:space-between;align-items:center;gap:32px;padding-bottom:32px;display:flex}.footer-main nav{flex-wrap:wrap;gap:12px 28px;font-size:13px;display:flex}.footer-main nav a,.footer-bottom nav a{align-items:center;min-height:44px;display:inline-flex}.footer-main a:hover,.footer-bottom a:hover{color:var(--accent)}.footer-bottom{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 24px;padding-top:20px;font-size:11px;display:flex}.footer-bottom>p:first-child{flex-basis:100%}.footer-bottom nav{gap:24px;display:flex}.home-hero{isolation:isolate;background:var(--surface);align-items:center;min-height:660px;padding-block:72px 110px;display:flex;position:relative;overflow:clip}.home-hero>.container{z-index:1;position:relative}.home-hero-copy{text-align:left;justify-items:start;gap:22px;max-width:690px;animation:.45s ease-out both arrive;display:grid}.home-hero-copy>.eyebrow{color:var(--accent)}.home-hero h1{letter-spacing:-.045em;font-size:clamp(30px,3.3vw,46px);line-height:1.55}.home-hero h1 span{color:var(--accent)}.home-hero-description{color:var(--muted);font-size:15px;line-height:1.9}.hero-actions{justify-content:flex-start;gap:12px;margin-top:4px;display:flex}.battery-hero-visual{z-index:-1;pointer-events:none;position:absolute;inset:0}.battery-hero-visual:after{content:"";background:linear-gradient(90deg,#fffffff5 0%,#ffffffe0 25%,#ffffff85 43%,#0000 64%);position:absolute;inset:0}.battery-hero-image,.battery-hero-canvas,.battery-hero-canvas canvas{width:100%;height:100%;position:absolute;inset:0}.battery-hero-image{object-fit:cover;object-position:74% center}.battery-hero-canvas{opacity:0;transition:opacity .6s}.battery-hero-canvas[data-ready=true]{opacity:1}.battery-hero-canvas canvas{display:block}.home-disclosure{padding-top:16px}.use-grid{border-block:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.use-option{align-items:center;gap:16px;padding:28px 20px;transition:background .16s;display:flex}.use-option:not(:last-child){border-right:1px solid var(--line)}.use-option>svg:first-child{color:var(--accent);width:28px;height:28px}.use-option>svg:last-child{width:17px;margin-left:auto}.use-option h3{font-size:17px}.use-option p{color:var(--muted);margin-top:5px;font-size:12px}.use-option:hover{background:var(--surface)}.basics-section{background:var(--surface);padding-block:64px}.basics-layout{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);align-items:center;gap:100px;display:grid}.basics-heading{justify-items:start;gap:16px;display:grid}.basics-heading>p:not(.eyebrow){max-width:28em;color:var(--muted);font-size:14px}.basics-topics{border-top:1px solid var(--line)}.basics-topics>a{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;padding-block:24px;display:flex}.basics-topics h3{font-size:18px}.basics-topics p{color:var(--muted);margin-top:6px;font-size:13px}.basics-topics a:hover h3{color:var(--accent)}.basics-topics svg{color:var(--accent);width:18px}.product-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;display:grid}.product-tile{flex-direction:column;align-items:flex-start;min-width:0;display:flex}.product-visual{aspect-ratio:1.4;background:var(--surface);border-radius:var(--radius);place-items:center;width:100%;margin-bottom:22px;display:grid;position:relative}.product-image{object-fit:contain;width:100%;height:100%}.product-visual .product-image{mix-blend-mode:multiply;padding:24px;transition:transform .2s}.product-visual:hover .product-image{transform:scale(1.03)}.visual-arrow{width:32px;height:32px;color:var(--accent);background:var(--canvas);border-radius:50%;place-items:center;display:grid;position:absolute;bottom:14px;right:14px}.product-tile h3{margin-top:7px;font-size:19px}.product-tile h3 a:hover{color:var(--accent)}.product-model{color:var(--muted);font-size:12px;line-height:1.6}.product-tile .product-model{margin-top:4px}.specs{font-variant-numeric:tabular-nums;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;width:100%;display:grid}.specs dt{color:var(--muted);margin-bottom:5px;font-size:11px}.specs dd{white-space:nowrap;font-size:20px;font-weight:650;line-height:1.4}.specs dd small{color:var(--muted);margin-left:4px;font-size:11px;font-weight:400}.specs .unknown{white-space:normal;font-size:12px;font-weight:400;display:block}.product-tile .specs{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}.output-note{color:var(--muted);margin-top:10px;font-size:11px;line-height:1.7}.product-summary{color:var(--muted);margin-block:16px;font-size:13px;line-height:1.85}.product-tile>.text-link{margin-top:auto}.image-placeholder{background:var(--surface);width:100%;height:100%;color:var(--muted);text-align:center;place-content:center;font-size:12px;display:grid}.home-guides,.guide-list{border-top:1px solid var(--line)}.guide-item{border-bottom:1px solid var(--line);grid-template-columns:36px minmax(0,1fr) 20px;align-items:center;gap:24px;padding-block:28px;display:grid}.guide-number{color:var(--muted);font-variant-numeric:tabular-nums;align-self:start;padding-top:3px;font-size:14px}.guide-item h3{margin-top:5px}.guide-item>div>p:not(.eyebrow){color:var(--muted);margin-top:8px;font-size:13px}.guide-item>svg,.guide-item:hover h3{color:var(--accent)}.home-guides .guide-list{border:0;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:48px;display:grid}.home-guides .guide-item{border-top:1px solid var(--line);border-bottom:0;grid-template-columns:26px minmax(0,1fr) 18px;gap:16px}.home-guides .guide-item h3{font-size:17px}.faq-section{border-top:1px solid var(--line);grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);gap:64px;display:grid}.faq-section .section-heading{align-self:start}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line);padding-bottom:0}.faq-list summary{justify-content:space-between;align-items:center;gap:24px;padding-block:22px;font-size:15px;font-weight:600;list-style:none;display:flex}summary::-webkit-details-marker{display:none}.faq-list summary>span{color:var(--accent);font-size:22px;font-weight:400;transition:transform .16s}.faq-list details[open] summary>span{transform:rotate(45deg)}.faq-list details[open]{padding-bottom:20px}.faq-list details>p{color:var(--muted);margin-bottom:8px;font-size:14px}.closing{background:var(--tint);padding-block:44px}.closing-inner{justify-content:space-between;align-items:center;gap:32px;display:flex}.closing h2{font-size:25px}.closing p{color:var(--muted);margin-top:6px;font-size:14px}.closing .button{flex-shrink:0}.compare-page{padding-bottom:56px}.compare-layout{grid-template-columns:230px minmax(0,1fr);align-items:start;gap:40px;display:grid}.filters{background:var(--surface);border-radius:var(--radius);top:calc(var(--header-height) + 24px);max-height:calc(100svh - var(--header-height) - 48px);gap:20px;padding:20px;display:grid;position:sticky;overflow-y:auto}.filter-heading{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px;display:flex}.filter-heading h2{font-size:16px}.filter-heading button{color:var(--accent);text-underline-offset:3px;background:0 0;border:0;min-height:32px;padding:4px 0;font-size:12px;text-decoration:underline}.filters label{gap:8px;font-size:12px;font-weight:600;display:grid}input[type=search],select{width:100%;min-width:0;min-height:44px;color:var(--ink);background:var(--canvas);border:1px solid #bcc6d3;border-radius:6px;padding:9px 12px;font-size:13px;line-height:1.6}input[type=search]::placeholder{color:var(--muted);font-size:11px}.filters select{padding-right:4px}.filter-advanced-toggle{display:none}.advanced-filters{gap:20px;display:grid}.filter-note{color:var(--muted);font-size:11px;line-height:1.8}.results{min-width:0}.results-toolbar{justify-content:space-between;align-items:center;gap:20px;margin-bottom:16px;display:flex}.results-toolbar>p{color:var(--muted);font-size:13px}.results-toolbar strong{color:var(--ink);font-variant-numeric:tabular-nums;margin-right:4px;font-size:26px;font-weight:600}.results-toolbar>label{white-space:nowrap;align-items:center;gap:10px;font-size:12px;display:flex}.results-toolbar select{width:auto;max-width:190px;font-size:12px}.results-note,.results-help{color:var(--muted);margin-bottom:12px;font-size:12px;line-height:1.8}.results-help summary{min-height:44px;color:var(--muted);text-underline-offset:3px;align-items:center;gap:10px;text-decoration:underline;display:flex}.results-help p{margin-bottom:12px}.result-list{border-top:1px solid var(--line)}.result-row{border-bottom:1px solid var(--line);grid-template-columns:140px minmax(0,1fr);gap:28px;padding-block:28px;display:grid}.result-image{background:var(--surface);border-radius:var(--radius);aspect-ratio:1;align-self:start;place-items:center;display:grid}.result-image .product-image{mix-blend-mode:multiply;padding:12px}.result-information{min-width:0}.result-information h2{margin-block:4px;font-size:20px}.result-information h2 a:hover{color:var(--accent)}.result-information .specs{max-width:400px;margin-block:18px 0}.result-summary{color:var(--muted);margin-top:16px;font-size:13px}.quick-purchase{color:var(--muted);margin-block:8px;font-size:12px}.quick-purchase>summary{min-height:40px;color:var(--ink);align-items:center;gap:8px;list-style:none;display:flex}.quick-purchase>summary:before{content:"+";color:var(--accent);font-size:18px}.quick-purchase[open]>summary:before{content:"−"}.quick-purchase>p{margin-block:8px}.quick-purchase>a{color:var(--accent);text-underline-offset:3px;text-decoration:underline}.quick-purchase[open]{background:var(--surface);border-radius:6px;margin-block:14px;padding:12px 16px}.result-actions{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 20px;margin-top:14px;display:flex}.compare-checkbox{cursor:pointer;align-items:center;gap:10px;min-height:44px;font-size:12px;display:inline-flex}.compare-checkbox input{width:18px;height:18px;accent-color:var(--accent);flex-shrink:0;margin:0}.compare-checkbox:has(input:disabled){color:var(--muted);cursor:not-allowed}.compare-checkbox:has(input:checked){color:var(--accent)}.result-actions .text-link{font-size:12px}.no-results{border-block:1px solid var(--line);justify-items:start;gap:20px;padding:52px 24px;display:grid}.no-results h2{font-size:21px}.no-results p{color:var(--muted);font-size:14px}.inline-note{border-left:3px solid var(--accent);background:var(--surface);margin-block:20px;padding:16px 20px;font-size:13px;line-height:1.9}.selected-comparison{border-top:1px solid var(--line);margin-top:64px;padding-top:32px}.selected-comparison h2{font-size:26px}.table-scroll,.guide-table{overscroll-behavior-inline:contain;border:1px solid var(--line);border-radius:var(--radius);width:100%;max-width:100%;overflow-x:auto}table{border-collapse:collapse;text-align:left;width:100%}th{font-weight:600}th,td{border-bottom:1px solid var(--line);vertical-align:top;padding:16px 20px}thead th{background:var(--surface);font-size:13px}tbody th{background:#fafbfd}tbody tr:last-child>*{border-bottom:0}.table-scroll table{min-width:650px;font-size:13px}.table-scroll th{min-width:140px}.table-scroll thead th:not(:first-child){min-width:200px}.table-scroll caption{caption-side:bottom;text-align:left;color:var(--muted);border-top:1px solid var(--line);padding:12px 18px;font-size:11px}.table-scroll th a{color:var(--accent)}.table-scroll th button{min-height:36px;color:var(--muted);background:0 0;border:0;padding:4px 0;font-size:11px;text-decoration:underline;display:block}.comparison-output-note{color:var(--muted);margin-top:6px;font-size:11px;line-height:1.7;display:block}.compare-tray{z-index:35;background:var(--canvas);border:1px solid var(--line);border-radius:12px;justify-content:space-between;align-items:center;gap:32px;width:min(440px,100% - 32px);padding:12px 16px;display:flex;position:fixed;bottom:20px;left:50%;transform:translate(-50%);box-shadow:0 6px 28px #19212f1a}.compare-tray>p{font-size:12px}.compare-tray strong{color:var(--accent);font-size:18px}.compare-tray .button{min-height:44px;padding:10px 18px;font-size:13px}body:has(.compare-tray) .site-footer{padding-bottom:112px}.compare-end{max-width:60em}.product-panel{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:44px;padding:28px}.panel-heading{justify-content:space-between;align-items:center;gap:20px;padding-bottom:24px;display:flex}.product-detail-top{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);align-items:start;gap:48px;display:grid}.product-detail-image{min-width:0}.product-detail-image>.product-image{aspect-ratio:1;background:var(--surface);border-radius:var(--radius);mix-blend-mode:multiply;width:100%;padding:24px}.product-detail-image figcaption{color:var(--muted);padding-top:12px;font-size:11px}.product-detail-image figcaption a{text-underline-offset:3px;text-decoration:underline}.product-detail-image figcaption svg{margin-left:5px}.product-detail-intro{min-width:0}.product-name{margin-block:8px;font-size:28px}.detail-model{color:var(--muted);font-size:13px}.detail-summary{margin-block:20px;font-size:14px}.product-detail-intro .specs{border-block:1px solid var(--line);padding-block:20px}.evidence-label{color:var(--muted);margin-top:20px;font-size:11px;display:inline-block}.evidence-note{color:var(--muted);margin-top:6px;font-size:11px}.before-purchase{margin-top:24px}.before-purchase h2,.before-purchase h3{font-size:17px}.before-purchase ul{color:var(--muted);padding-left:1.3em;font-size:13px}.before-purchase>p{color:var(--muted);font-size:12px}.purchase-block{margin-top:20px}.purchase-caption{color:var(--muted);font-size:11px}.buy-links{gap:10px;margin-top:10px;display:flex}.buy-links a{border:1px solid var(--line);background:var(--canvas);border-radius:6px;flex:1;justify-content:space-between;align-items:center;gap:18px;min-height:44px;padding:10px 16px;font-size:13px;display:flex}.buy-links a:hover{color:var(--accent);border-color:var(--accent)}.detail-spec-section{border-top:1px solid var(--line);grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:48px;margin-top:40px;padding-block:40px;display:grid}.detail-spec-section h2{margin-block:8px 16px;font-size:23px}.detail-spec-section>div>p:not(.eyebrow){color:var(--muted);font-size:13px}.detail-specs>div{border-bottom:1px solid var(--line);grid-template-columns:120px minmax(0,1fr);gap:20px;padding-block:14px;font-size:13px;display:grid}.detail-specs dt{color:var(--muted)}.source-link{margin-top:16px}.source-link a{color:var(--accent);text-underline-offset:4px;align-items:center;gap:10px;font-size:13px;text-decoration:underline;display:inline-flex}.product-safety{margin-block:0}.product-safety h2{margin-bottom:8px;font-size:17px}.product-safety .text-link{margin-top:8px}.guide-index{max-width:960px;padding-bottom:80px}.guide-index .page-heading{padding-bottom:48px}.guide-page{padding-bottom:28px}.article-heading{gap:16px;max-width:800px;padding-block:24px 28px;display:grid}.article-heading h1{font-size:clamp(28px,3.3vw,40px);line-height:1.65}.guide-kicker{color:var(--accent);font-size:12px;font-weight:600}.article-description{color:var(--muted);max-width:46em;font-size:15px;line-height:1.9}.article-byline{color:var(--muted);flex-wrap:wrap;align-items:center;gap:12px 24px;margin-top:8px;font-size:11px;display:flex}.article-byline a:hover{color:var(--accent);text-decoration:underline}.article-disclosure{border-block:1px solid var(--line);justify-content:space-between;align-items:center;gap:16px;padding-block:16px;display:flex}.article-disclosure .reading-start{white-space:nowrap;font-size:12px}.article-copy{grid-area:1/1}.article-layout{grid-template-columns:minmax(0,680px) minmax(0,260px);justify-content:space-between;align-items:start;gap:64px;padding-top:32px;display:grid}.prose{letter-spacing:.01em;overflow-wrap:anywhere;min-width:0;max-width:40ic;font-size:17px;line-height:1.95}.prose>:first-child{margin-top:0}.prose p{margin-block:0 1.6em}.prose h2{border-top:1px solid var(--line);margin-block:2.8em 1em;padding-top:1.1em;font-size:25px;line-height:1.75}.prose h3{margin-block:2em .8em;font-size:20px}.prose ul,.prose ol{margin-block:0 1.6em;padding-left:1.4em}.prose li{margin-block:.6em}.prose a{color:var(--accent);text-underline-offset:4px;text-decoration:underline;text-decoration-thickness:1px}.prose a:hover{text-decoration-thickness:2px}.prose strong{font-weight:700}.prose blockquote{border-left:3px solid var(--line);color:var(--muted);background:var(--surface);margin:1.6em 0;padding:16px 24px;font-size:15px}.prose blockquote>p:last-child{margin-bottom:0}.prose code{background:var(--surface);padding:2px 5px;font-size:.85em}.prose pre{background:var(--surface);padding:20px;overflow-x:auto}.prose hr{border:0;border-top:1px solid var(--line);margin-block:40px}.guide-table{margin-block:28px}.guide-table table{letter-spacing:0;min-width:500px;font-size:13px;line-height:1.9}.guide-table th,.guide-table td{min-width:110px;padding:16px}.reader-rail{top:calc(var(--header-height) + 28px);min-width:0;max-height:calc(100svh - var(--header-height) - 48px);grid-area:1/2;padding-right:8px;position:sticky;overflow-y:auto}.reading-track{background:var(--line);height:2px;margin-bottom:20px}.reading-track>div{background:var(--accent);transform-origin:0;width:100%;height:100%;transform:scaleX(0)}.reader-label{justify-content:space-between;margin-bottom:12px;font-size:13px;font-weight:600;display:flex}.reader-label>span{color:var(--muted);font-weight:400}.reader-toc ol,.reader-toc-mobile ol{margin:0;padding:0;list-style:none}.reader-toc a,.reader-toc-mobile a{color:var(--muted);gap:12px;padding:10px 0;font-size:12px;line-height:1.8;display:flex}.reader-toc a>span,.reader-toc-mobile a>span{font-variant-numeric:tabular-nums;min-width:16px;padding-top:2px;font-size:10px}.reader-toc a:hover,.reader-toc a[aria-current],.reader-toc-mobile a:hover,.reader-toc-mobile a[aria-current]{color:var(--accent)}.reader-toc a[aria-current]{font-weight:600}.reader-toc-mobile{display:none}.reader-cta{border-top:1px solid var(--line);margin-top:24px;padding-top:24px}.reader-cta>h2{margin-bottom:8px;font-size:16px}.reader-cta>p{color:var(--muted);font-size:12px}.reader-cta .button{width:100%;min-height:44px;margin-top:16px;padding:10px 14px;font-size:12px}.policy-page{max-width:800px;padding-bottom:80px}.policy-page .prose{max-width:40ic}.policy-intro{padding-block:0}.policy-section{border-top:1px solid var(--line);margin-top:48px;padding-top:48px}.policy-section-title{margin-bottom:28px;font-size:28px}.policy-section .prose h2{border-top:0;margin-top:2em;padding-top:0;font-size:22px}.policy-nav{border-bottom:1px solid var(--line);color:var(--accent);flex-wrap:wrap;gap:12px 24px;margin-bottom:32px;padding-bottom:24px;font-size:14px;display:flex}.policy-nav a{align-items:center;min-height:44px;display:inline-flex}@keyframes arrive{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media (width<=1023px){.navigation{gap:20px}.brand{font-size:15px}.basics-layout{gap:48px}.use-option{gap:12px;padding:24px 16px}.use-option h3{font-size:15px}.use-option>svg:first-child{display:none}.compare-layout{grid-template-columns:210px minmax(0,1fr);gap:28px}.filters{padding:16px}.result-row{grid-template-columns:100px minmax(0,1fr);gap:20px}.article-layout{grid-template-columns:minmax(0,1fr) 220px;gap:36px}.faq-section{gap:36px}.product-detail-top,.detail-spec-section{gap:28px}}@media (width<=800px){:root{--header-height:64px}.container{width:calc(100% - 40px)}.header-inner{gap:16px}.menu-toggle{background:0 0;border:0;border-radius:6px;place-items:center;min-width:44px;height:44px;margin-right:-8px;padding:10px;display:grid}.menu-icon{gap:6px;display:grid}.menu-icon>span{background:var(--ink);width:20px;height:1.5px}.navigation{background:var(--canvas);border-bottom:1px solid var(--line);padding:12px 20px 20px;display:none;position:absolute;top:100%;left:0;right:0}.navigation.is-open{flex-direction:column;gap:0;display:flex}.navigation a{border-radius:6px;min-height:48px;padding:8px 12px;font-size:14px}.navigation a.is-active{background:var(--tint)}.navigation a.is-active:after{display:none}.footer-main{flex-direction:column;align-items:flex-start;gap:20px}.footer-main nav{gap:8px 24px}.section{padding-block:48px}.section-heading{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:24px}.page-heading{padding-bottom:32px}.home-hero{align-items:flex-start;min-height:800px;padding-block:42px 370px}.home-hero-copy{text-align:center;justify-items:center;max-width:none}.home-hero h1{font-size:38px}.battery-hero-visual{height:480px;top:auto}.battery-hero-visual:after{background:linear-gradient(180deg, var(--surface), transparent 45%)}.use-grid{grid-template-columns:1fr}.use-option{gap:20px;padding:22px 8px}.use-option:not(:last-child){border-right:0;border-bottom:1px solid var(--line)}.use-option>svg:first-child{display:block}.use-option h3{font-size:17px}.basics-section{padding-block:48px}.basics-layout{grid-template-columns:1fr;gap:32px}.basics-heading>p:not(.eyebrow){max-width:40em}.basics-heading h2 br{display:none}.product-grid{gap:24px}.product-visual{aspect-ratio:1}.product-visual .product-image{padding:16px}.product-tile h3{font-size:16px}.product-tile .specs{gap:8px}.product-tile .specs dd{font-size:16px}.product-tile .specs dd small{margin-left:2px;font-size:9px}.product-tile .specs .unknown{font-size:11px}.home-guides .guide-list{column-gap:28px}.home-guides .guide-item{grid-template-columns:minmax(0,1fr) 18px}.home-guides .guide-number{display:none}.faq-section{grid-template-columns:1fr;gap:0}.closing-inner{flex-direction:column;align-items:flex-start;gap:24px}.compare-layout{grid-template-columns:1fr;gap:28px}.filters{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;max-height:none;padding:20px;position:static;overflow:visible}.filter-heading{grid-column:1/-1}.filter-advanced-toggle{border:0;border-top:1px solid var(--line);background:0 0;grid-column:1/-1;justify-content:space-between;align-items:center;min-height:44px;padding:14px 0 0;font-size:13px;display:flex}.advanced-filters{grid-column:1/-1;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:none}.advanced-filters.is-open{display:grid}.filter-note{grid-column:1/-1}.result-row{grid-template-columns:140px minmax(0,1fr);gap:24px}.product-detail-top,.detail-spec-section{grid-template-columns:minmax(0,1fr);gap:28px}.product-detail-image{width:100%;max-width:340px;margin-inline:auto}.article-layout{flex-direction:column;gap:28px;padding-top:16px;display:flex}.article-copy{order:1;max-width:100%}.reader-rail{order:0;width:100%;max-height:none;padding:0;position:static;overflow:visible}.reader-toc{display:none}.reader-toc-mobile{border-block:1px solid var(--line);display:block}.reader-toc-mobile summary{justify-content:space-between;align-items:center;gap:24px;min-height:56px;font-size:13px;font-weight:600;list-style:none;display:flex}.reader-toc-mobile summary>span{color:var(--accent);font-size:18px}.reader-toc-mobile ol{padding-bottom:12px}.reader-toc-mobile a{min-height:44px}.reader-cta,.reading-track{display:none}.policy-page{max-width:680px}}@media (width<=540px){.compare-page .breadcrumb{padding-block:16px}.compare-page .page-heading{gap:10px;padding-top:8px;padding-bottom:28px}.filters:has(.advanced-filters:not(.is-open)) .filter-note{display:none}.container{width:calc(100% - 40px)}.brand{gap:8px;font-size:14px}.brand>svg{width:26px;height:26px}.home-hero{min-height:780px;padding-block:32px 340px}.home-hero-copy{gap:16px}.home-hero h1{letter-spacing:-.04em;font-size:clamp(25px,6.6vw,35px);line-height:1.7}.home-hero-description{max-width:24em;font-size:13px}.desktop-break{display:none}.hero-actions{flex-direction:column;gap:10px;width:100%;max-width:300px}.hero-actions .button{min-height:46px;font-size:13px}.battery-hero-visual{height:380px}.home-disclosure{padding-top:12px}.home-disclosure .disclosure-note{font-size:10px}.section-heading h2{font-size:24px}.section-heading>.text-link{font-size:13px}.basics-heading h2{font-size:25px}.basics-topics h3{font-size:16px}.basics-topics p{font-size:12px}.product-grid{grid-template-columns:minmax(0,1fr);gap:36px}.product-visual{aspect-ratio:1.5;margin-bottom:18px}.product-visual .product-image{padding:24px}.product-tile h3{font-size:20px}.product-tile .specs dd{font-size:22px}.product-tile .specs dd small{margin-left:4px;font-size:12px}.product-tile .specs{margin-top:16px;padding-top:16px}.product-summary{font-size:14px}.home-guides .guide-list{grid-template-columns:minmax(0,1fr)}.guide-item{grid-template-columns:24px minmax(0,1fr) 18px;gap:12px;padding-block:24px}.guide-item h3{font-size:17px}.guide-item>div>p:not(.eyebrow),.guide-number{font-size:12px}.faq-list summary{font-size:14px}.faq-list details>p{font-size:13px}.closing{padding-block:36px}.closing h2{font-size:22px}.closing p{font-size:13px}.closing .button{width:100%}.footer-main nav{flex-direction:column;gap:0}.footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}.page-heading h1{font-size:30px}.page-heading>p:not(.eyebrow,.disclosure-note){font-size:14px}.filters{grid-template-columns:minmax(0,1fr);gap:12px;padding:16px}input[type=search],select{font-size:16px}.advanced-filters.is-open{grid-template-columns:minmax(0,1fr)}.filter-heading{align-items:center}.filter-heading button{min-height:44px}.results-toolbar{gap:12px}.results-toolbar>label{gap:6px;font-size:11px}.results-toolbar select{max-width:142px;padding-inline:6px}.results-toolbar strong{font-size:24px}.result-row{grid-template-columns:80px minmax(0,1fr);gap:16px;padding-block:24px}.result-image .product-image{padding:6px}.result-information h2{font-size:17px}.result-information .eyebrow{font-size:10px}.result-information .specs{gap:6px}.result-information .specs dt{font-size:10px}.result-information .specs dd{font-size:17px}.result-information .specs dd small{margin:4px 0 0;font-size:10px;display:block}.result-information .specs .unknown{font-size:11px}.result-information .output-note{font-size:10px}.result-summary{font-size:12px}.compare-checkbox{gap:8px;font-size:11px}.result-actions{gap:0}.quick-purchase{font-size:11px}.quick-purchase[open]{margin-top:18px;margin-left:-96px;padding:10px}.result-actions .text-link{font-size:11px}.selected-comparison{margin-top:40px}.selected-comparison .section-heading{flex-direction:column}.selected-comparison h2{font-size:23px}.compare-tray{gap:12px;padding:10px 12px;bottom:12px}.compare-tray .button{gap:10px;padding:10px 14px;font-size:12px}.product-panel{padding:20px 16px}.panel-heading{align-items:flex-start;gap:12px}.panel-heading .text-link{min-height:32px;font-size:11px}.panel-heading .eyebrow{font-size:10px}.product-name{font-size:23px}.detail-spec-section{margin-top:28px;padding-top:28px}.detail-specs>div{grid-template-columns:84px minmax(0,1fr);gap:16px;font-size:12px}.buy-links a{gap:8px;padding-inline:12px;font-size:12px}.product-safety{padding:14px;font-size:12px}.product-safety h2{font-size:16px}.article-heading{gap:14px;padding-block:12px 24px}.article-heading h1{font-size:27px;line-height:1.65}.article-description{font-size:14px}.article-byline{gap:8px 16px;font-size:10px}.prose{font-size:17px;line-height:1.95}.prose h2{margin-top:2.2em;font-size:23px}.prose h3{font-size:19px}.policy-page .page-heading{padding-bottom:28px}.policy-section{margin-top:36px;padding-top:36px}.policy-section-title{font-size:26px}.policy-section .prose h2{font-size:21px}}.compare-catalogue .breadcrumb{padding-block:16px}.compare-catalogue .page-heading{gap:8px;padding-block:8px 24px}.compare-catalogue .page-heading h1{font-size:clamp(26px,3vw,36px)}.compare-catalogue .compare-layout{grid-template-columns:minmax(0,1fr);gap:28px;display:grid}.compare-catalogue .filters{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr) auto;align-items:end;gap:16px;max-height:none;padding:16px 20px;position:static;overflow:visible}.compare-catalogue .filter-heading{grid-column:1/-1;align-items:center}.compare-catalogue .filter-heading button{min-height:36px}.compare-catalogue .filter-advanced-toggle{background:var(--canvas);border:1px solid #bcc6d3;border-radius:6px;grid-column:auto;justify-content:space-between;align-items:center;gap:24px;min-height:44px;padding:10px 16px;font-size:13px;display:flex}.compare-catalogue .filter-advanced-toggle[aria-expanded=true]{border-color:var(--accent);color:var(--accent)}.compare-catalogue .advanced-filters{grid-column:1/-1;display:none}.compare-catalogue .advanced-filters.is-open{border-top:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;padding-top:16px;display:grid}.compare-catalogue .filter-note{grid-column:1/-1}.compare-catalogue .filters:has(.advanced-filters:not(.is-open)) .filter-note{display:none}.capacity-presets{gap:8px;padding-bottom:20px;display:flex}.capacity-presets button{border:1px solid var(--line);background:var(--canvas);border-radius:6px;min-width:112px;min-height:44px;padding:10px 20px;font-size:13px;font-weight:500;transition:background .16s,border-color .16s}.capacity-presets button:hover{border-color:var(--accent)}.capacity-presets button[aria-pressed=true]{background:var(--accent);border-color:var(--accent);color:#fff}.compare-catalogue .results-toolbar{margin-bottom:8px}.catalogue-instructions,.catalogue-scroll-hint{color:var(--muted);font-size:12px;line-height:1.8}.catalogue-scroll-hint{margin-top:4px;display:none}.compare-catalogue .results-help{margin-bottom:12px}.compare-catalogue .results-help summary{min-height:36px;font-size:11px}.catalogue-scroll{overscroll-behavior-inline:contain;border:1px solid var(--line);border-radius:var(--radius);width:100%;overflow-x:auto}.catalogue-table{table-layout:fixed;width:100%;min-width:960px;font-size:13px}.catalogue-product-column{width:300px}.catalogue-capacity-column{width:100px}.catalogue-output-column{width:140px}.catalogue-weight-column{width:90px}.catalogue-table th,.catalogue-table td{vertical-align:top;padding:20px 14px;line-height:1.75}.catalogue-table thead th{padding-block:14px;font-size:12px;font-weight:600}.catalogue-table thead th small{color:var(--muted);font-size:10px;font-weight:400;line-height:1.5;display:block}.catalogue-table thead th:first-child{vertical-align:middle}.catalogue-selection-hint{color:var(--muted);margin-left:12px;font-size:10px;font-weight:400}.catalogue-table tbody th{background:var(--canvas)}.catalogue-table tr>:first-child{z-index:1;box-shadow:1px 0 0 var(--line);position:sticky;left:0}.catalogue-product{align-items:flex-start;gap:10px;display:flex}.catalogue-select{flex-shrink:0;justify-content:center;width:36px}.catalogue-image{background:var(--surface);border-radius:5px;flex-shrink:0;width:48px;height:48px}.catalogue-image .product-image{mix-blend-mode:multiply;padding:3px}.catalogue-identity{gap:5px;min-width:0;padding-top:2px;display:grid}.catalogue-identity .eyebrow{letter-spacing:.02em;font-size:10px}.catalogue-name{font-size:13px;font-weight:600;line-height:1.6}.catalogue-identity .product-model{font-size:10px;font-weight:400}.catalogue-table .catalogue-number{font-variant-numeric:tabular-nums;font-size:18px;font-weight:600}.catalogue-number .comparison-output-note{white-space:normal;font-size:10px;font-weight:400;line-height:1.65}.catalogue-unknown{color:var(--muted);font-size:12px;font-weight:400}.catalogue-summary{font-size:12px;font-weight:400;line-height:1.85}.catalogue-table .quick-purchase{margin:8px 0 0;font-size:11px}.catalogue-table .quick-purchase>summary{min-height:44px;color:var(--accent);font-size:11px}.catalogue-table .quick-purchase[open]{margin:8px 0 0;padding:12px}.catalogue-table .quick-purchase .purchase-block{margin-top:12px}.catalogue-image-credit{padding-block:8px;display:block}.catalogue-row:hover>*{background:#fafbfd}.catalogue-row:target>*,.catalogue-row[data-selected=true]>*{background:var(--tint)}.selected-product-image{background:var(--canvas);border-radius:6px;width:72px;height:72px;margin-bottom:12px}.selected-product-image .product-image{padding:6px}.selected-product-name{margin-block:6px;font-weight:600;display:block}.compare-catalogue .table-scroll th .product-model{font-weight:400;display:block}.selected-cautions{margin:0;padding-left:1.2em}.selected-cautions li+li{margin-top:10px}.comparison-source{color:var(--accent);text-underline-offset:3px;text-decoration:underline}.compare-catalogue .compare-tray{width:min(480px,100% - 32px)}@media (width<=1024px){.catalogue-scroll-hint{display:block}}@media (width<=800px){.compare-catalogue .filters{grid-template-columns:minmax(0,1fr) minmax(0,1fr);padding:16px 20px}.compare-catalogue .filter-advanced-toggle{border:0;border-top:1px solid var(--line);background:0 0;border-radius:0;grid-column:1/-1;padding:12px 0 0}.compare-catalogue .advanced-filters.is-open{border:0;padding-top:0}}@media (width<=540px){.compare-catalogue .page-heading h1{font-size:26px}.compare-catalogue .page-heading>p:not(.disclosure-note){font-size:13px}.compare-catalogue .filters{grid-template-columns:minmax(0,1fr);gap:12px;padding:12px 16px}.compare-catalogue .filter-heading button{min-height:44px}.compare-catalogue .advanced-filters.is-open{grid-template-columns:minmax(0,1fr)}.capacity-presets{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;padding-bottom:16px;display:grid}.capacity-presets button{min-width:0;padding:10px 2px;font-size:11px}.catalogue-instructions{font-size:11px}.catalogue-scroll-hint{font-size:10px}.catalogue-table{min-width:800px}.catalogue-product-column{width:180px}.catalogue-capacity-column{width:86px}.catalogue-output-column{width:130px}.catalogue-weight-column{width:78px}.catalogue-table th,.catalogue-table td{padding:16px 10px}.catalogue-table thead th{padding-block:12px;font-size:11px}.catalogue-table thead th:first-child .catalogue-selection-hint{margin-left:0;display:block}.catalogue-product{gap:4px}.catalogue-select{width:32px;min-height:44px}.catalogue-image{display:none}.catalogue-name{font-size:12px}.catalogue-identity .eyebrow,.catalogue-identity .product-model{font-size:9px}.catalogue-table .catalogue-number{font-size:16px}.catalogue-table .quick-purchase{font-size:11px}.catalogue-table .quick-purchase[open]{margin:8px 0 0;padding:10px}.compare-catalogue .compare-tray .button{gap:8px;font-size:12px}.compare-catalogue .compare-tray>p{font-size:11px}}.catalogue-price-note{color:var(--muted);max-width:70em;margin-top:8px;font-size:12px;line-height:1.85}.catalogue-table{min-width:1100px}.catalogue-price-column{width:184px}.historical-price{gap:5px;display:grid}.historical-price-amount{font-variant-numeric:tabular-nums;white-space:nowrap;font-size:20px;font-weight:650;line-height:1.5}.historical-price-amount small{margin-left:3px;font-size:12px;font-weight:400}.historical-price time{color:var(--muted);white-space:nowrap;font-size:10px}.catalogue-price .purchase-block{margin-top:12px}.catalogue-price .purchase-caption{font-size:10px;line-height:1.7}.catalogue-price .buy-links{flex-direction:column;gap:6px;margin-top:8px}.catalogue-price .buy-links a{width:100%;min-height:44px;padding:10px 12px;font-size:12px}.catalogue-price .buy-links svg{width:14px;height:14px}.selected-price .purchase-block{margin-top:12px}.selected-price .buy-links{flex-wrap:wrap}.selected-price .buy-links a{flex-basis:120px}@media (width<=1164px){.catalogue-scroll-hint{display:block}}@media (width<=540px){.catalogue-table{min-width:900px}.catalogue-product-column{width:156px}.catalogue-price-column{width:132px}.catalogue-price-note{font-size:11px}.historical-price-amount{font-size:18px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}@media (forced-colors:active){.button,.menu-toggle,.compare-tray{border:1px solid buttontext}.navigation a.is-active{text-decoration:underline}.reader-toc a[aria-current]{outline:1px solid linktext}}