:root{--paper:#f7f5ed;--ink:#203a32;--green:#275c47;--muted:#657269;--line:#d9dfd4;--lime:#dce8ae;--white:#fffef9;--rust:#94523a}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--green);text-underline-offset:4px}a:hover{color:var(--rust)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #b05a34;outline-offset:4px}h1,h2,h3{line-height:1.15;text-wrap:balance}h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:500;letter-spacing:-.035em}h1{font-size:clamp(2.5rem,5.3vw,4.4rem);margin:.5rem 0 1.7rem}h2{font-size:clamp(1.8rem,3vw,2.5rem);margin:2.8rem 0 1.1rem}h3{font-size:1.25rem}p{margin:0 0 1.25rem}body>aside{font-size:12px;letter-spacing:.04em;background:#e9eddb;color:#405446;text-align:center;padding:.5rem 1rem}header{max-width:1240px;margin:auto;padding:1.4rem 2rem;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:2rem}header .brand{font-weight:800;font-size:25px;letter-spacing:-.08em;text-decoration:none;display:flex;align-items:center;gap:10px}brand span{letter-spacing:0}header nav{display:flex;gap:1.7rem;align-items:center}header nav a{text-decoration:none;font-size:14px;font-weight:600}.brand-icon{width:35px;height:35px;border:1px solid var(--green);border-radius:50%;display:grid;place-items:center;letter-spacing:0;font-size:24px}.skip-link{position:absolute;left:12px;top:-100px;z-index:5;background:white;padding:10px}.skip-link:focus{top:12px}main{max-width:900px;margin:3rem auto 5rem;padding:0 2rem}main.article{max-width:920px}main.article>p,main.article>ul,main.article>ol{max-width:740px}.article-top{border-bottom:1px solid var(--line);padding-bottom:2rem;margin-bottom:2.5rem}.eyebrow{display:block;color:var(--green);font:600 11px/1.4 system-ui;letter-spacing:.15em;text-transform:uppercase}.article-date{font-size:13px;color:var(--muted);margin:0}.article-date a{color:inherit}main.article blockquote{border-left:3px solid var(--green);padding:1rem 1.6rem;margin:2rem 0;background:#eef0e6}main img{max-width:100%;height:auto;display:block;border-radius:6px}figure{margin:2rem 0}figcaption{font-size:13px;color:var(--muted)}iframe,video{max-width:100%}iframe{min-height:320px}table{max-width:100%;display:block;overflow:auto;border-collapse:collapse;font-size:15px}td,th{padding:10px 14px;border:1px solid var(--line)}th{background:#e9eee1}hr{border:0;border-top:1px solid var(--line);margin:2rem 0}.home{max-width:1240px;margin-top:0}.hero{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center;padding:3.5rem 0 4rem;border-bottom:1px solid var(--line)}.hero h1{font-size:clamp(3rem,6vw,5.5rem);max-width:580px;margin:1rem 0 1.5rem}.hero h1 em{color:var(--green)}.hero .intro{max-width:460px;color:var(--muted);font-size:18px}.hero-photo{position:relative}.hero-photo img{width:100%;aspect-ratio:4/4.5;object-fit:cover;object-position:70% center;border-radius:4px}.photo-caption{position:absolute;bottom:18px;left:18px;right:18px;background:var(--paper);padding:14px 18px;display:flex;align-items:center;justify-content:space-between;font-size:12px}.hero-actions{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;margin:2rem 0}.button{display:inline-flex;background:var(--green);color:white;text-decoration:none;padding:12px 22px;border-radius:3px;font-size:14px;font-weight:600}.button:hover{background:var(--ink);color:white}.text-link{font-size:14px;font-weight:600}.section-title{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;margin:3rem 0 1.5rem}.section-title h2{margin:0}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.topic-card{text-decoration:none;background:var(--white);border:1px solid var(--line);padding:1.7rem;transition:transform .15s}.topic-card:hover{transform:translateY(-3px);border-color:var(--green)}.topic-card .number{font:12px ui-monospace,monospace;color:var(--muted)}.topic-card h3{font-family:Georgia,serif;font-size:25px;font-weight:500;margin:1.7rem 0 .7rem}.topic-card p{font-size:14px;color:var(--muted);margin:0}.feature-tool{margin:3.5rem 0;background:var(--ink);color:var(--paper);padding:2.5rem 3rem;display:grid;grid-template-columns:1fr auto;gap:2rem;align-items:center}.feature-tool h2{margin:.6rem 0 1rem}.feature-tool p{max-width:640px;font-size:15px;color:#d4dfd4;margin:0}.feature-tool .eyebrow{color:var(--lime)}.feature-tool .button{background:var(--lime);color:var(--ink)}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2rem 1.4rem}.guide-card{background:var(--white);border:1px solid var(--line);overflow:hidden}.guide-card img{width:100%;height:190px;object-fit:cover;border-radius:0}.guide-body{padding:1.3rem}.guide-card h3{font-family:Georgia,serif;font-size:23px;font-weight:500;line-height:1.25;margin:.7rem 0 1rem}.guide-card a{text-decoration:none}.guide-card p{color:var(--muted);font-size:13px;margin:0}.card-placeholder{height:190px;background:#e4ead9;display:grid;place-items:center;font-family:Georgia,serif;font-size:40px;color:var(--green)}.archive{max-width:1240px}.pagination{display:inline-block;margin:2rem 0}.reading-note{font-size:12px;color:var(--muted);margin:1rem 0 2rem}footer{border-top:1px solid var(--line);max-width:1240px;padding:2.5rem 2rem 3rem;margin:auto;font-size:12px;color:var(--muted)}footer .footer-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;gap:1rem}footer .footer-brand{font-size:22px;color:var(--ink);font-weight:750}footer p{max-width:800px;margin:0}footer a{margin-right:1rem}button{cursor:pointer;font:inherit}footer button{font-size:12px;margin-top:1rem;background:none;border:1px solid var(--line);padding:6px 12px;border-radius:3px;color:var(--green)}input,select{font:inherit;color:var(--ink);background:white;border:1px solid #bfcbbd;border-radius:4px;padding:10px;width:100%;min-width:0}input[type=range]{padding:0;accent-color:var(--green);width:100%;height:28px}#query{margin:1rem 0}#results{padding:0;list-style:none}#results li{padding:1rem;border-bottom:1px solid var(--line)}.battery-tool{margin:2rem 0 3rem;background:var(--white);border:1px solid var(--line);border-radius:8px;overflow:hidden}.tool-heading{padding:2.2rem 2.3rem 0}.tool-heading h2{margin:.6rem 0 1rem}.tool-heading p{color:var(--muted);font-size:15px;max-width:650px}.tool-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:2.5rem;padding:1rem 2.3rem 2.3rem}.tool-inputs label{display:flex;justify-content:space-between;font-size:13px;font-weight:650;margin:1.2rem 0 .5rem;gap:1rem}.tool-inputs label span{font-weight:400;color:var(--muted)}.tool-inputs small{display:block;font-size:11px;color:var(--muted);line-height:1.5;margin-top:.5rem}.tool-result{background:#edf1e1;padding:2rem;border-radius:5px;align-self:start;margin-top:1.2rem}.capacity{font:500 clamp(3rem,5vw,5rem)/1.2 Georgia,serif;letter-spacing:-.05em;margin:1rem 0 .3rem}.capacity span{font-size:1.6rem;letter-spacing:0;color:var(--muted)}.capacity-detail{font-size:16px;margin-bottom:1.8rem}.battery-graphic{height:56px;border:2px solid var(--green);border-radius:7px;position:relative;padding:3px;margin-right:7px}.battery-graphic:after{content:'';position:absolute;right:-8px;top:17px;width:6px;height:18px;background:var(--green);border-radius:0 3px 3px 0}#battery-fill{background:var(--green);height:100%;border-radius:3px;color:white;font-size:11px;display:flex;align-items:center;justify-content:center;overflow:hidden;white-space:nowrap;transition:width .2s}.battery-key{font-size:10px;display:flex;justify-content:space-between;gap:1rem;margin:.7rem 0 1.6rem;color:var(--muted)}.battery-key i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--green)}.result-note{font-size:12px;line-height:1.6;color:var(--muted)}.formula{border-top:1px solid #ccd5bd;padding-top:1rem}.formula span{font-size:9px;letter-spacing:.12em;font-weight:600}.formula p{font:12px/1.6 ui-monospace,monospace;margin:.6rem 0 0;overflow-wrap:anywhere}.pack-comparison{padding:1.5rem 2.3rem;border-top:1px solid var(--line)}.pack-comparison h3{margin:0 0 .7rem}.pack-comparison p{font-size:12px;color:var(--muted)}#pack-options{display:grid;grid-template-columns:repeat(5,1fr);gap:.6rem}.pack-option{background:#f4f4ed;border:1px solid var(--line);border-radius:4px;padding:.8rem .5rem;text-align:center;font-size:13px}.pack-option span{display:block;font-size:9px;margin-top:.3rem;color:var(--muted)}.pack-option.fits{border-color:#7e9a68;background:#eef3df}.tool-caveat{padding:1.2rem 2.3rem;margin:0;background:#f4f3e9;font-size:11px;line-height:1.6;color:var(--muted)}.calc-error{font-size:12px;color:#a03721;margin:1rem 0 0}.battery-tool noscript p{padding:1rem}.tool-page{max-width:1100px}.tool-page>h1{max-width:850px}.tool-page>p{max-width:740px}.tool-page h2:not(#tool-heading){font-size:2rem}section[aria-label="Analytics consent"]{background:var(--white);border-radius:5px}section[aria-label="Analytics consent"] button{padding:8px 14px;margin-right:8px;border:1px solid var(--green);border-radius:3px;background:var(--green);color:white;font-size:13px}section[aria-label="Analytics consent"] button:last-child{color:var(--green);background:none}section[aria-label="Analytics consent"][hidden]{display:none!important}
@media(max-width:800px){header{padding:1rem 1.2rem;flex-wrap:wrap;gap:.8rem}header nav{gap:1.1rem;flex-wrap:wrap}header nav a{font-size:12px}.hero{gap:2rem;padding:2rem 0 2.5rem}.hero h1{font-size:3.3rem}.hero .intro{font-size:15px}.hero-photo img{aspect-ratio:3/4}.cards{grid-template-columns:repeat(2,1fr)}.topic-card{padding:1.2rem}.topic-card h3{font-size:21px}.tool-grid{gap:1.5rem;padding:1rem 1.4rem 1.5rem}.tool-heading{padding:1.6rem 1.4rem 0}.tool-result{padding:1.5rem}.pack-comparison{padding:1.4rem}.tool-caveat{padding:1.3rem}.feature-tool{padding:2rem;grid-template-columns:1fr}}
@media(max-width:560px){main{padding:0 1.2rem;margin-top:2rem}header nav{width:100%;display:grid;grid-template-columns:1fr 1fr;row-gap:.7rem}.hero{grid-template-columns:1fr;gap:2rem}.hero h1{font-size:3.6rem}.hero-photo img{aspect-ratio:4/3}.hero .intro{font-size:17px}.topic-grid{grid-template-columns:1fr}.topic-card{padding:1.2rem 1.5rem}.topic-card h3{margin:.5rem 0}.cards{grid-template-columns:1fr;gap:1.3rem}.guide-card{display:grid;grid-template-columns:115px 1fr;min-width:0}.guide-card img,.card-placeholder{height:100%;min-height:160px}.guide-card h3{font-size:20px}.guide-body{padding:1rem}.guide-body p{font-size:11px}.section-title h2{font-size:1.9rem}.section-title>a{font-size:12px}.feature-tool{padding:1.8rem}.tool-grid{grid-template-columns:1fr;gap:.5rem}.tool-result{margin:1rem 0 0}.capacity{font-size:4.5rem}#pack-options{grid-template-columns:repeat(3,1fr)}.pack-option{font-size:12px}.article-top{padding-bottom:1.4rem;margin-bottom:1.5rem}main.article h1{font-size:2.6rem}main.article p{font-size:16px}footer{padding:2rem 1.2rem}.footer-top{flex-wrap:wrap}iframe{width:100%;min-height:260px}.battery-key{flex-wrap:wrap}.photo-caption{font-size:10px}h2{margin-top:2rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.cost-layout{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin:2rem 0}.cost-inputs{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.cost-inputs label{display:flex;flex-direction:column;gap:.4rem;font-weight:600;font-size:.9rem}.cost-inputs input,.cost-inputs select{width:100%;min-width:0;padding:.8rem;border:1px solid #aab8ac;border-radius:8px;background:white;font:inherit;color:#17382f}.cost-result{padding:2rem;background:#e8efdf;border-radius:16px;align-self:start}.cost-total{font-size:clamp(2rem,5vw,3.5rem);font-weight:700;margin:.7rem 0}.cost-bar{height:8px;background:#d2dcc9;border-radius:5px;overflow:hidden}.cost-bar span{display:block;height:100%;background:#24634e}#cost-error{color:#8a301d}.cost-inputs input:focus-visible,.cost-inputs select:focus-visible{outline:3px solid #24634e;outline-offset:2px}@media(max-width:700px){.cost-layout{grid-template-columns:1fr}.cost-result{padding:1.3rem}}@media(max-width:400px){.cost-inputs{grid-template-columns:1fr}}