:root{
  --black:#000;
  --red:#e3000f;
  --red-deep:#b5000c;
  --steel:#9b9fa4;
  --asphalt:#24272b;
  --concrete:#eceef0;
  --paper:#fff;
  --ink:#16181a;
  --muted:#565c63;
  --led:#ff2a2a;
  --display:"Michroma","Eurostile","Bank Gothic",sans-serif;
  --body:"Archivo",system-ui,"Segoe UI",Roboto,Arial,sans-serif;
  --gutter:16px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.55;font-variation-settings:"wdth" 100}
h1,h2,h3{font-family:var(--body);font-variation-settings:"wdth" 118;font-weight:800;line-height:1.08;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(1.9rem,1.2rem + 2.4vw,3rem)}
h2{font-size:clamp(1.5rem,1.1rem + 1.6vw,2.3rem)}
p{margin:0 0 1em}
a{color:inherit;text-decoration-color:var(--red);text-decoration-thickness:2px;text-underline-offset:3px}
a:hover{text-decoration-color:var(--ink)}
:focus-visible{outline:3px solid var(--red);outline-offset:3px}
.wrap{max-width:1180px;margin:0 auto;padding:0 var(--gutter)}
.narrow{max-width:760px}
.skip{position:absolute;left:-999px;top:0;background:var(--black);color:#fff;padding:8px 12px;z-index:9}
.skip:focus{left:8px;top:8px}

.top{border-bottom:3px solid var(--black)}
.top-in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;padding-top:14px;padding-bottom:14px}
.logo{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--black)}
.logo img{display:block;width:220px;height:auto}
.logo-sub{font-weight:700;font-variation-settings:"wdth" 112;padding-left:14px;border-left:3px solid var(--red);line-height:1.2}
.nav{display:flex;flex-wrap:wrap;gap:4px 20px;font-weight:600}
.nav a{text-decoration:none;padding:6px 0;border-bottom:3px solid transparent}
.nav a:hover{border-bottom-color:var(--red)}

.hero{padding:32px 0 64px;border-bottom:3px solid var(--black)}
.hero-in{display:grid;grid-template-columns:1fr 1fr;gap:28px 40px;align-items:start}
.hero-copy{align-self:center;max-width:36rem}
.hero-pic{display:block;border:3px solid var(--black);box-shadow:8px 8px 0 var(--red)}
.hero-pic img{display:block;width:100%;height:auto;aspect-ratio:1600/840;object-fit:cover}
.lead{font-size:1.2rem;color:var(--muted);max-width:40rem}

.calc{display:grid;gap:16px;background:var(--paper);border:3px solid var(--black);padding:18px 20px}
.calc fieldset{border:0;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px 16px}
.calc legend{font-weight:800;font-variation-settings:"wdth" 118;font-size:1.05rem;padding:0;margin-bottom:8px}
.calc label{display:grid;gap:3px;align-content:end;font-size:.88rem;font-weight:600;color:var(--muted)}
.calc .in{max-width:11rem}
.in{display:flex;align-items:stretch;border:2px solid var(--ink);background:var(--paper)}
.in:focus-within{outline:3px solid var(--red);outline-offset:2px}
.in input{flex:1;min-width:0;width:100%;border:0;padding:6px 8px;font:inherit;font-size:1.05rem;font-weight:600;color:var(--ink);text-align:right;font-variant-numeric:tabular-nums;background:transparent;color:var(--ink)}
.in input:focus{outline:none}
.in em{font-style:normal;display:flex;align-items:center;justify-content:center;width:3.2em;flex:none;background:var(--concrete);border-left:2px solid var(--ink);color:var(--muted);font-size:.85rem}
.in input[aria-invalid="true"]{background:#fff0f1}
.calc-err{margin:0;color:var(--red-deep);font-weight:600}

.pump{position:sticky;top:16px;display:grid;gap:12px}
.pump-face{background:var(--asphalt);color:#e9ebed;border-radius:14px 14px 4px 4px;padding:26px 24px 20px;box-shadow:inset 0 0 0 3px var(--black),0 18px 0 -10px var(--black)}
.pump-label{margin:0 0 6px;color:var(--steel)}
.pump-big{display:block;background:#0a0a0a;border:2px solid #3a3e44;border-radius:4px;padding:12px 16px;font-family:var(--display);font-size:clamp(2.4rem,1.4rem + 4vw,4.2rem);line-height:1.1;text-align:right;color:var(--led);text-shadow:0 0 14px rgba(255,42,42,.45);font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.pump-big.neg{color:#4cdf7a;text-shadow:0 0 14px rgba(76,223,122,.4)}
.pump-unit{display:block;text-align:right;color:var(--steel);margin-top:4px}
.pump-rows{margin-top:18px;display:grid;gap:2px}
.pump-rows p{display:flex;justify-content:space-between;gap:12px;margin:0;padding:8px 0;border-top:1px solid #3a3e44}
.pump-rows output{font-variant-numeric:tabular-nums;font-weight:600;color:#fff}
.pump-sum{font-weight:700}
.pump-sum output{color:var(--led)}
.btn{justify-self:start;font:inherit;font-weight:700;padding:12px 20px;background:var(--black);color:#fff;border:0;border-radius:3px;cursor:pointer;box-shadow:3px 3px 0 var(--red)}
.btn:hover{background:var(--red-deep)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--red)}
.dock{display:none}
.hint{margin:0;color:var(--muted);font-size:.95rem}

.band{background:var(--concrete);padding:64px 0}
.two{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.steps{padding-left:1.3em;margin:0}
.steps li{margin-bottom:.6em}
.steps li::marker{font-weight:800;color:var(--red)}
.formula{margin:0;background:var(--paper);border:3px solid var(--black);box-shadow:8px 8px 0 var(--red);padding:24px}
.f-line{font-weight:800;font-variation-settings:"wdth" 112;font-size:clamp(1.1rem,.9rem + .7vw,1.4rem);line-height:1.4;margin-bottom:16px}
.formula figcaption{color:var(--muted)}

.road{position:relative;color:#fff;padding:96px 0;background:#0d0f12 url("img/maut-autobahn-960.jpg") 70% 50% / cover no-repeat;background-image:linear-gradient(90deg,rgba(8,9,11,.92) 0 38%,rgba(8,9,11,.15) 75%),url("img/maut-autobahn-1600.jpg");background-image:linear-gradient(90deg,rgba(8,9,11,.92) 0 38%,rgba(8,9,11,.15) 75%),image-set(url("img/maut-autobahn-1600.webp") type("image/webp"),url("img/maut-autobahn-1600.jpg") type("image/jpeg"))}
.road-copy{max-width:34rem}
.road a{color:#fff}
.plain{padding:56px 0}
details{border-top:2px solid var(--ink);padding:14px 0}
details:last-of-type{border-bottom:2px solid var(--ink)}
summary{cursor:pointer;font-weight:700;font-size:1.1rem}
details p{margin:10px 0 0;max-width:62ch}
.erp{margin-top:40px;padding:24px;border:3px solid var(--black);box-shadow:8px 8px 0 var(--red);background:var(--paper)}
.erp h3{margin-bottom:.4em}
.erp .btn{display:inline-block;text-decoration:none;margin-top:4px}

.foot{border-top:3px solid var(--black);padding:28px 0 36px}
.foot-in p{margin:0 0 6px}
.foot-logo{display:inline-block;margin-bottom:14px}
.foot-logo img{display:block;width:180px;height:auto}
.foot-nav{display:flex;flex-wrap:wrap;gap:4px 20px;margin:10px 0 16px;font-weight:600}
.fine{color:var(--muted);font-size:.9rem}

@media (max-width:860px){
  .hero-pic{order:3;box-shadow:5px 5px 0 var(--red)}
  .road{padding:64px 0;background-image:linear-gradient(rgba(8,9,11,.82),rgba(8,9,11,.82)),url("img/maut-autobahn-960.jpg");background-image:linear-gradient(rgba(8,9,11,.82),rgba(8,9,11,.82)),image-set(url("img/maut-autobahn-960.webp") type("image/webp"),url("img/maut-autobahn-960.jpg") type("image/jpeg"))}
  .logo img{width:170px}
  .hero-in,.two{grid-template-columns:1fr}
  .pump{position:static}
  .dock:not([hidden]){position:fixed;left:0;right:0;bottom:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px var(--gutter);background:var(--asphalt);color:#fff;text-decoration:none;border-top:3px solid var(--black)}
  .dock b{font-family:var(--display);color:var(--led);font-size:1.3rem;font-weight:400;font-variant-numeric:tabular-nums}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}