:root{
  --yellow:#f6b900;
  --yellow2:#ffca18;
  --black:#111;
  --dark:#1a1a1a;
  --soft:#f4f4f2;
  --white:#fff;
  --text:#272727;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.topbar{background:var(--yellow);color:#111;text-align:center;font-size:12px;font-weight:800;letter-spacing:2px;padding:8px 20px}
.site-header{position:sticky;top:0;z-index:50;background:#111;color:#fff;box-shadow:0 2px 16px rgba(0,0,0,.18)}
.nav-wrap{max-width:1240px;margin:auto;height:76px;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:1px}
.brand img{width:145px;height:auto}
.brand span{font-size:12px;border-left:1px solid #777;padding-left:10px}
nav{display:flex;gap:30px;font-weight:700;font-size:14px}
nav a:hover{color:var(--yellow)}
.menu-btn{display:none;background:none;border:0;color:#fff;font-size:26px}
.hero{min-height:620px;background:linear-gradient(115deg,#111 0%,#171717 61%,#252525 61%);position:relative;overflow:hidden;display:flex;align-items:center}
.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(130deg,transparent 62%,rgba(246,185,0,.18) 62%)}
.hero-content{position:relative;z-index:3;width:min(1240px,100%);padding:80px 24px;margin:auto}
.hero-content>*{max-width:670px}
.eyebrow{font-size:13px;letter-spacing:2.3px;font-weight:900;color:var(--yellow);margin:0 0 14px}
.eyebrow.dark{color:#806000}
.hero h1{font-size:64px;line-height:.98;text-transform:uppercase;color:#fff;margin:0 0 24px;font-weight:900;letter-spacing:-2px}
.hero h1 span{color:var(--yellow)}
.hero-copy{color:#ddd;font-size:19px;line-height:1.5}
.hero-actions{display:flex;gap:14px;margin-top:32px}
.btn{display:inline-block;padding:15px 24px;font-size:14px;font-weight:900;text-transform:uppercase;letter-spacing:.5px}
.btn.primary{background:var(--yellow);color:#111}
.btn.secondary{border:2px solid #fff;color:#fff}
.hero-product{position:absolute;z-index:2;right:-1%;bottom:5%;width:43%;max-height:520px;object-fit:contain;filter:drop-shadow(0 24px 30px rgba(0,0,0,.45))}
.section{max-width:1240px;margin:auto;padding:90px 24px}
.section-head{max-width:780px;margin-bottom:38px}
.section-head h2,.feature-band h2,.about h2{font-size:42px;line-height:1.05;margin:0 0 16px;color:#111;text-transform:uppercase}
.section-head p{font-size:17px;line-height:1.6;color:#666}
.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.category-card{background:var(--soft);min-height:150px;padding:26px;display:flex;flex-direction:column;justify-content:flex-end;border-bottom:5px solid transparent;transition:.2s}
.category-card:hover{transform:translateY(-3px);border-bottom-color:var(--yellow);background:#ececea}
.category-card strong{font-size:18px;text-transform:uppercase}
.category-card span{margin-top:7px;color:#777;font-size:14px}
.feature-band{background:var(--yellow);min-height:320px;padding:60px max(24px,calc((100vw - 1192px)/2));display:flex;align-items:center;justify-content:space-between;gap:40px}
.feature-band .eyebrow{color:#111}
.feature-band h2{font-size:52px}
.feature-band p{font-size:18px;max-width:650px}
.text-link{font-weight:900;text-transform:uppercase;border-bottom:2px solid #111;padding-bottom:4px}
.battery-badge{width:220px;height:220px;border:16px solid #111;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-direction:column;font-size:60px;font-weight:1000;color:#111}
.battery-badge small{font-size:14px;letter-spacing:1px}
.product-feature{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.product-image-wrap{background:#f5f5f5;min-height:450px;display:grid;place-items:center;padding:30px}
.product-image-wrap img{max-height:420px;object-fit:contain}
.product-copy h3{font-size:34px;text-transform:uppercase;margin:8px 0 14px}
.product-copy p,.product-copy li{line-height:1.6}
.product-copy ul{padding-left:20px;margin-bottom:28px}
.sku{font-weight:900;color:#777;letter-spacing:1px}
.dark-btn{background:#111!important;color:#fff!important}
.about{background:#111;color:#fff;padding:90px 24px}
.about-inner{max-width:900px;margin:auto;text-align:center}
.about h2{color:#fff;font-size:48px}
.about p:last-child{font-size:18px;line-height:1.7;color:#ccc}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-grid>div{background:#f4f4f2;padding:28px;display:flex;flex-direction:column;gap:8px}
.contact-grid strong{text-transform:uppercase}
.contact-grid span{color:#666}
footer{background:#090909;color:#aaa;padding:48px 24px;text-align:center}
.footer-brand{justify-content:center;color:#fff;margin-bottom:18px}
footer p{max-width:800px;margin:auto;font-size:13px}
@media(max-width:900px){
  nav{display:none;position:absolute;left:0;right:0;top:108px;background:#111;flex-direction:column;padding:25px}
  .menu-open nav{display:flex}
  .menu-btn{display:block}
  .hero{min-height:740px;align-items:flex-start}
  .hero-content{padding-top:70px}
  .hero h1{font-size:46px}
  .hero-product{width:72%;right:-10%;bottom:0;opacity:.9}
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .feature-band{flex-direction:column;align-items:flex-start}
  .product-feature{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:560px){
  .hero h1{font-size:38px}
  .hero-copy{font-size:16px}
  .hero-actions{flex-direction:column;align-items:flex-start}
  .hero-product{width:95%;right:-22%}
  .category-grid{grid-template-columns:1fr}
  .section-head h2,.feature-band h2,.about h2{font-size:34px}
}