:root{--y:#ffd400;--b:#0b0b0c;--p:#f4f4f1;--m:#6b6b70;--l:#dddde0}
*{box-sizing:border-box;-webkit-tap-highlight-color:#ffd40033}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;color:#171719;font:16px/1.6 Inter,sans-serif}
a{text-decoration:none;color:inherit}
button,input,select{font:inherit;color:inherit}
button{-webkit-appearance:none;appearance:none}
.top{background:var(--y);text-align:center;padding:7px;font-size:9px;font-weight:800;letter-spacing:.15em}
header{height:75px;padding:0 max(4vw,calc((100vw - 1350px)/2));display:flex;align-items:center;gap:30px;border-bottom:1px solid #eee;position:sticky;top:0;background:#fffd;backdrop-filter:blur(12px);z-index:10}
.logo img{width:155px;display:block}
header nav{display:flex;gap:25px;margin-left:auto;font-size:13px;font-weight:800}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;background:var(--y);border:0;padding:14px 20px;font-size:14px;font-weight:800;line-height:1.2;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px #0002}
h1,h2,h3{font-family:'Barlow Condensed',sans-serif;text-transform:uppercase;line-height:.95;margin:0}
.hero{padding:90px max(5vw,calc((100vw - 1250px)/2));background:#111;color:#fff}
.hero h1{font-size:clamp(60px,7vw,100px)}
.hero h1 em{color:var(--y);font-style:normal}
.hero>p:last-child{color:#aaa;max-width:650px;font-size:17px}
.eyebrow{font-size:9px;font-weight:800;letter-spacing:.16em}
.eyebrow:before{content:"";display:inline-block;width:25px;height:3px;background:var(--y);margin-right:9px;vertical-align:middle}
.toolnav{display:flex;gap:5px;padding:13px max(4vw,calc((100vw - 1350px)/2));overflow:auto;background:var(--y);position:sticky;top:75px;z-index:9}
.toolnav a{background:#fff9;padding:9px 13px;white-space:nowrap;font-size:12px;font-weight:800}
.tool{padding:90px max(5vw,calc((100vw - 1250px)/2))}
.tool.dark{background:#111;color:#fff}
.tool.pale{background:var(--p)}
.toolhead{display:grid;grid-template-columns:80px 1fr;gap:20px;margin-bottom:40px}
.toolhead>span{font:900 70px 'Barlow Condensed';color:#ddd}
.dark .toolhead>span{color:#333}
.toolhead h2,.camper-banner h2{font-size:clamp(42px,5vw,66px)}
.toolhead p:last-child{color:var(--m);max-width:700px}
.calcbox{display:grid;grid-template-columns:1fr auto 1fr auto;gap:20px;align-items:end;background:var(--p);padding:32px}
.dark .calcbox{background:#1c1c1e}
.measure h3{font-size:24px;margin-bottom:16px}
.row{display:flex;align-items:center;gap:7px}
.row input,.row select,.simplecalc input,.simplecalc select,.etgrid input,.etgrid select{width:72px;padding:12px 8px;border:1px solid var(--l);background:#fff;text-align:center;border-radius:0}
.row select:invalid,.simplecalc select:invalid,.etgrid select:invalid{color:#aaa}
.row.small{margin-top:10px}
.row.small input,.row.small select{width:150px}
.arrow{font-size:28px;padding-bottom:12px}
.result{grid-column:1/-1;background:#111;color:#fff;padding:22px;border-left:6px solid var(--y)}
.dark .result{background:#fff;color:#111}
.result small{font-size:8px;font-weight:800;letter-spacing:.14em}
.result h3{font-size:30px;color:var(--y);margin:6px 0}
.dark .result h3{color:#8b7600}
.result p{margin:0;color:#aaa;font-size:14px}
.result.good{background:#12351f}
.result.warn{background:#3a1713}
.result.good,.result.good h3,.result.good p,.result.good li,.result.good strong,.result.good small,.dark .result.good,.dark .result.good h3,.dark .result.good p,.dark .result.good li,.dark .result.good strong,.dark .result.good small{color:#fff;-webkit-text-fill-color:#fff}
.result.warn,.result.warn h3,.result.warn p,.result.warn li,.result.warn strong,.result.warn small,.dark .result.warn,.dark .result.warn h3,.dark .result.warn p,.dark .result.warn li,.dark .result.warn strong,.dark .result.warn small{color:#fff;-webkit-text-fill-color:#fff}
.simplecalc,.etgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;align-items:end}
.simplecalc label,.etgrid label{display:grid;gap:7px;font-size:13px;font-weight:800}
.simplecalc input,.simplecalc select,.etgrid input,.etgrid select{width:100%;text-align:left;min-height:48px}
.simplecalc .result,.etgrid .result{grid-column:1/-1}
.etgrid{grid-template-columns:repeat(6,1fr)}
.camper-banner{display:grid;grid-template-columns:1fr 1fr;background:var(--y)}
.camper-banner>div{padding:75px max(5vw,calc((100vw - 1250px)/2));padding-right:50px}
.camper-banner p{max-width:580px}
.camper-banner .btn{background:#111;color:#fff}
.camper-banner img{width:100%;height:100%;object-fit:cover;min-height:400px}
.downloadgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.downloadgrid a{border:1px solid var(--l);padding:20px;display:flex;justify-content:space-between;font-size:10px;font-weight:800}
.downloadgrid a:hover{background:var(--y)}
footer{background:#09090a;color:#aaa;padding:35px max(5vw,calc((100vw - 1250px)/2));display:flex;align-items:center;justify-content:space-between;gap:30px;font-size:12px}
footer img{width:150px}
.request-band{padding:64px max(5vw,calc((100vw - 1250px)/2));background:#111;color:#fff;display:grid;grid-template-columns:1fr auto;gap:50px;align-items:center}
.request-band h2{font-size:clamp(38px,4vw,58px)}
.request-band p:last-child{max-width:760px;color:#aaa}
.request-band .btn{white-space:nowrap}
:where(a,button,input,select):focus-visible{outline:3px solid var(--y);outline-offset:3px;box-shadow:0 0 0 2px #111}
@media(max-width:800px){header nav,header>.btn{display:none}
.toolnav{top:75px}
.toolhead{grid-template-columns:1fr}
.toolhead>span{font-size:40px}
.calcbox{grid-template-columns:1fr}
.arrow{display:none}
.simplecalc,.etgrid{grid-template-columns:1fr 1fr}
.camper-banner{grid-template-columns:1fr}
.request-band{grid-template-columns:1fr;gap:24px}
.request-band .btn{justify-self:start}
.downloadgrid{grid-template-columns:1fr 1fr}
}
@media(max-width:500px){header{padding:0 18px}
.tool,.hero{padding:65px 20px}
.row input,.row select{width:28%}
.row.small input,.row.small select{width:48%}
.simplecalc,.etgrid,.downloadgrid{grid-template-columns:1fr}
.camper-banner>div{padding:60px 20px}
.camper-banner img{min-height:260px}
footer{gap:20px;align-items:flex-start;flex-direction:column}
}
.tyre-reference-alert{margin-top:18px;padding:15px 16px;border:1px solid #ffd400;border-radius:7px;background:#fff8d6;color:#171719}.tyre-reference-alert strong{display:flex;align-items:flex-start;gap:8px;font-size:14px}.result.warn .tyre-reference-alert,.result.warn .tyre-reference-alert strong{color:#171719;-webkit-text-fill-color:#171719}.result.warn .tyre-reference-alert p{margin:7px 0 0;color:#38383b;-webkit-text-fill-color:#38383b;line-height:1.55}