/* Fekzen.se – E85 To Go, guide into E85 ethanol conversions */
:root{
  --bg:#121416;--panel:#1a1d20;--ink:#ebe9e4;--muted:#9097a0;--line:#2a2e33;
  --or:#ff8a1f;--or-hover:#ffa24d;
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Consolas,"Courier New",monospace;
  --display:"Chakra Petch",var(--sans);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.55}
img{max-width:100%}
a{color:inherit}
:focus-visible{outline:2px solid var(--or);outline-offset:3px}
.wrap{max-width:1180px;margin:0 auto;padding-inline:clamp(16px,4vw,40px)}
main,footer,header.site{position:relative;z-index:1}
[id]{scroll-margin-top:16px}

/* background: chalkboard formulas down the right side, fading out to the left, with orange bits */
.e85bg{position:fixed;inset:0 0 0 auto;width:60%;z-index:0;pointer-events:none;
  -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 45%);mask-image:linear-gradient(90deg,transparent 0,#000 45%)}
.e85bg .chalk{position:absolute;inset:0;background:url(../img/e85-bg.jpg) right top/cover no-repeat;opacity:.9}
.e85bg .bits{position:absolute;inset:0}
.e85bg .bits>*{position:absolute;color:var(--or);opacity:.55;font:500 15px var(--mono);white-space:nowrap}
.e85bg .bits svg{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

/* header – same as fekzen.se, scrolls away with the page */
header.site{position:relative;z-index:20}
.bar{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding-block:18px;border-bottom:1px solid var(--line)}
.logo{display:block;line-height:0}
.logo img{height:clamp(34px,3.8vw,46px);width:auto;display:block}
.nav{display:flex;flex-wrap:wrap;gap:4px 24px;margin-left:auto;font:600 14px var(--display);text-transform:uppercase;letter-spacing:.06em}
.nav a{text-decoration:none;color:var(--muted)}
.nav a:hover,.nav a[aria-current]{color:var(--or)}
.menu-btn{display:none;align-items:center;gap:10px;margin-left:auto;font:600 14px var(--display);text-transform:uppercase;letter-spacing:.06em;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:2px;padding:9px 14px;cursor:pointer}
.menu-btn:hover,.menu-btn[aria-expanded="true"]{border-color:var(--or);color:var(--or)}
.menu-btn .bars{position:relative;width:18px;height:2px;background:currentColor;transition:background .15s}
.menu-btn .bars::before,.menu-btn .bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform .15s}
.menu-btn .bars::before{top:-6px}.menu-btn .bars::after{top:6px}
.menu-btn[aria-expanded="true"] .bars{background:transparent}
.menu-btn[aria-expanded="true"] .bars::before{transform:translateY(6px) rotate(45deg)}
.menu-btn[aria-expanded="true"] .bars::after{transform:translateY(-6px) rotate(-45deg)}
.mnav{order:5;width:100%;border:1px solid var(--line);background:var(--panel)}
.mnav .mlabel{font:500 11px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding:12px 16px 6px;margin:0}
.mnav a{display:flex;align-items:center;gap:14px;padding:11px 16px;border-top:1px solid var(--line);text-decoration:none;font:600 15px var(--display);text-transform:uppercase;letter-spacing:.04em}
.mnav a:hover{color:var(--or);background:#202428}
.mnav a svg{width:24px;height:24px;flex:none;fill:none;stroke:var(--or);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.mnav .mlinks{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}
.mnav .mlinks a{border-top:0;justify-content:center;font-size:13px;color:var(--muted)}
.mnav .mlinks a+a{border-left:1px solid var(--line)}
@media (min-width:881px){.mnav{display:none!important}}
.lang{font:500 12px var(--mono);display:flex;gap:2px;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.lang a,.lang span{padding:5px 8px;text-decoration:none;color:var(--muted)}
.lang a:hover{color:var(--or)}
.lang .on{background:var(--or);color:var(--bg)}

/* buttons */
.btns{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;font:600 15px var(--sans);text-decoration:none;padding:12px 20px;border:1.5px solid transparent;border-radius:2px;transition:background .15s,border-color .15s}
.btn.sm{padding:8px 14px;font-size:14px}
.btn.pri{background:var(--or);color:var(--bg)}
.btn.pri:hover{background:var(--or-hover)}
.btn.sec{border-color:var(--line);color:var(--ink);background:var(--bg)}
.btn.sec:hover{border-color:var(--or)}
.btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* shared bits */
.tag{display:inline-flex;gap:10px;align-items:center;font:500 12px var(--mono);color:var(--or);text-transform:uppercase;letter-spacing:.1em;margin:0 0 14px}
.tag::before{content:"";width:22px;height:2px;background:var(--or)}
h1,h2{font-family:var(--display);text-transform:uppercase;margin:0}
h1{font-weight:700;font-size:clamp(30px,4.6vw,56px);line-height:1.05;letter-spacing:-.01em;margin-bottom:22px;text-wrap:balance}
h2{font-weight:700;font-size:clamp(26px,3vw,38px);line-height:1.1;letter-spacing:.01em}
h1 em,h2 em{font-style:normal;color:var(--or)}
.ico{width:46px;height:46px;flex:none;border:1px solid var(--line);background:var(--bg);color:var(--or);display:grid;place-items:center}
.ico svg{width:28px;height:28px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.ico.big{width:64px;height:64px}
.ico.big svg{width:38px;height:38px}
.corner{position:absolute;width:14px;height:14px;border-color:var(--or);border-style:solid;z-index:1}
.c1{top:-1px;left:-1px;border-width:2px 0 0 2px}
.c2{bottom:-1px;right:-1px;border-width:0 2px 2px 0}

/* hero */
.hero{border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center;padding-block:clamp(40px,6vw,80px)}
.pluses{list-style:none;margin:0 0 26px;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.pluses li{font:500 13px var(--mono);color:var(--or);border:1px solid var(--line);background:rgba(18,20,22,.85);padding:6px 10px}
.pluses li::before{content:"✱ ";}
.mol{margin:0 0 28px;display:flex;align-items:center;gap:18px}
.mol svg{width:200px;height:auto;overflow:visible}
.mol figcaption{font:13px var(--mono);color:var(--muted)}
.mol figcaption sub{font-size:.75em}
#ethanol .a text{font:500 22px var(--mono);fill:var(--ink);text-anchor:middle;dominant-baseline:central}
#ethanol .b path{stroke:var(--or);stroke-width:2.2;stroke-linecap:round;fill:none}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:10px;max-width:440px}
.steps a{display:flex;align-items:center;gap:14px;padding:10px 12px;border:1px solid var(--line);background:rgba(18,20,22,.88);text-decoration:none;font:600 17px var(--display);text-transform:uppercase;letter-spacing:.04em;transition:border-color .15s}
.steps a:hover{border-color:var(--or)}
.steps b{color:var(--or);margin-right:6px}
.hero-img{position:relative;margin:0;border:1px solid var(--line);background:var(--panel);padding:10px}
.hero-img img{display:block;width:100%;height:auto;aspect-ratio:1/1;object-fit:cover}
.hero-img figcaption{display:flex;justify-content:space-between;gap:12px;font:12px var(--mono);color:var(--muted);padding-top:10px}
.hero-img figcaption b{color:var(--or);font-weight:500;white-space:nowrap}

/* step sections */
.step{border-bottom:1px solid var(--line);padding-block:clamp(44px,6vw,72px)}
.step-head{display:flex;gap:20px;align-items:center;margin-bottom:28px}
.step-head .tag{margin-bottom:8px}
.article{display:grid;grid-template-columns:1.2fr .8fr;gap:clamp(28px,5vw,56px);align-items:start}
.article>*{min-width:0}
.prose{max-width:66ch}
.prose p{margin:0 0 1.05em;color:#c9ccd1;font-size:16.5px;line-height:1.7}
.prose .intro{font-size:18.5px;color:var(--ink);line-height:1.6;border-left:2px solid var(--or);padding-left:16px}
.prose h3{font:600 19px/1.3 var(--display);text-transform:uppercase;letter-spacing:.03em;margin:30px 0 10px;color:var(--ink)}
.prose a{color:var(--or);text-underline-offset:3px}
.prose .more{font-weight:600;color:var(--ink)}
.done{margin:0 0 1.2em;padding:0;list-style:none;display:grid;gap:10px}
.done li{position:relative;padding:12px 14px 12px 40px;border:1px solid var(--line);background:rgba(18,20,22,.88);color:#c9ccd1;font-size:16px;line-height:1.6}
.done li::before{content:"";position:absolute;left:14px;top:20px;width:12px;height:7px;border:solid var(--or);border-width:0 0 2px 2px;transform:rotate(-45deg)}
.aside{display:flex;flex-direction:column;gap:16px;position:sticky;top:20px}
.spec{border:1px solid var(--line);background:rgba(18,20,22,.94)}
.spec h2{font-size:13px;letter-spacing:.08em;padding:12px 16px;border-bottom:1px solid var(--line);color:var(--muted)}
.spec dl{margin:0;display:grid;grid-template-columns:auto minmax(0,1fr)}
.spec dt,.spec dd{margin:0;padding:10px 16px;border-bottom:1px solid var(--line);font-size:14px}
.spec dt{color:var(--muted);white-space:nowrap;padding-right:8px}
.spec dd{font:500 13px var(--mono);color:var(--or);text-align:right;padding-left:8px}
.spec dl>*:nth-last-child(-n+2){border-bottom:0}
.card{display:grid;grid-template-columns:46px 1fr auto;gap:14px;align-items:center;padding:12px 14px;border:1px solid var(--line);background:rgba(18,20,22,.94);text-decoration:none;transition:border-color .15s}
.card:hover{border-color:var(--or)}
.card b{display:block;font:600 16px var(--display);text-transform:uppercase;letter-spacing:.04em}
.card small{display:block;font:12.5px var(--mono);color:var(--muted);margin-top:2px}
.card i{font-style:normal;color:var(--or);font-family:var(--mono)}
.product{display:flex;flex-direction:column;align-items:flex-start;gap:14px;padding:20px;border:1px solid var(--or);background:linear-gradient(180deg,#241a10,rgba(18,20,22,.94));text-decoration:none}
.product b{font:700 20px/1.2 var(--display);text-transform:uppercase;letter-spacing:.03em}
.product .btn{pointer-events:none}
.product:hover .btn{background:var(--or-hover)}

/* injector test */
.afr{display:grid;grid-template-columns:598fr 744fr;gap:20px;margin-bottom:26px}
.shot{text-decoration:none;display:block}
.shot figure{position:relative;margin:0;border:1px solid var(--line);background:var(--panel);padding:10px;transition:border-color .15s}
.shot:hover figure{border-color:var(--or)}
.shot figcaption{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:2px 2px 10px}
.shot figcaption b{font:700 22px var(--display);color:var(--or);text-transform:uppercase}
.shot figcaption span{font:12.5px var(--mono);color:var(--muted)}
.shot img{display:block;width:100%;height:auto}
.test-text{max-width:80ch}
.test-text p{margin:0 0 .9em;font:14.5px/1.7 var(--mono);color:#c9ccd1}
.test-text .key{color:var(--ink);border-left:2px solid var(--or);padding-left:14px;font-size:15px}
.test-text .btns{margin-top:20px}

/* contact + footer */
.contact{position:relative;z-index:1;background:rgba(18,20,22,.6)}
.contact .wrap{display:grid;grid-template-columns:1fr 1fr;gap:32px;padding-block:48px;align-items:center}
.contact h2{font-size:26px;margin-bottom:10px}
.flogo{display:inline-block;line-height:0;margin-bottom:22px}
.flogo img{height:40px;width:auto;display:block}
.contact p{color:var(--muted);margin:0}
.mail{font:500 clamp(22px,3vw,32px) var(--mono);color:var(--or);text-decoration:none}
address{font-style:normal;color:var(--muted);font-size:14px;margin-top:8px;line-height:1.7}
.contact .btns{margin-top:18px}
footer{border-top:1px solid var(--line);font:12px var(--mono);color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;padding-block:18px}
footer a{text-decoration:none}
footer a:hover{color:var(--or)}

/* lightbox */
.lb{border:1px solid var(--line);background:var(--panel);color:var(--ink);padding:10px;max-width:min(1100px,94vw);max-height:94vh}
.lb::backdrop{background:rgba(0,0,0,.82)}
.lb img{display:block;max-width:100%;max-height:80vh;margin:auto}
.lb p{margin:10px 2px 2px;font:13px var(--mono);color:var(--muted)}
.lb-x{position:absolute;top:6px;right:6px;width:36px;height:36px;font:24px/1 var(--sans);color:var(--ink);background:rgba(18,20,22,.85);border:1px solid var(--line);cursor:pointer}
.lb-x:hover{border-color:var(--or);color:var(--or)}

/* narrower screens and phones (phones get a 640px layout): keep everything side by side */
@media (max-width:880px){
  body{font-size:17px}
  .bar .nav{display:none}
  .menu-btn{display:inline-flex}
  .bar .lang{margin-left:auto}
  .bar .lang+.menu-btn{margin-left:0}
  .lang{font-size:13.8px;border-radius:7px}
  .lang a,.lang span{padding:6px 9px}
  /* phones get a 640px layout scaled ~61%: sizes below give the same on-screen size as on fekzen.se */
  .menu-btn{font-size:16px;padding:10px 16px;gap:11px}
  .menu-btn .bars,.menu-btn .bars::before,.menu-btn .bars::after{width:21px}
  .menu-btn .bars::before{top:-7px}.menu-btn .bars::after{top:7px}
  .menu-btn[aria-expanded="true"] .bars::before{transform:translateY(7px) rotate(45deg)}
  .menu-btn[aria-expanded="true"] .bars::after{transform:translateY(-7px) rotate(-45deg)}
  .mnav a{font-size:17.2px;padding:13px 18px}
  .mnav a svg{width:27px;height:27px}
  .mnav .mlabel{font-size:12.5px}
  .mnav .mlinks a{font-size:15px}
  .e85bg{width:70%}
  .hero .wrap{grid-template-columns:1.35fr .65fr;gap:24px;align-items:start;padding-block:36px}
  .hero-img{margin-top:30px}
  .hero-img figcaption{flex-direction:column;gap:2px}
  h1{font-size:38px}
  .mol svg{width:150px}
  .article{grid-template-columns:1.25fr .75fr;gap:22px}
  .prose p{font-size:16px}
  .spec dt,.spec dd{padding:9px 10px}
  .spec dl{grid-template-columns:1fr}
  .spec dt{padding-bottom:0;border-bottom:0}
  .spec dd{text-align:left;padding-top:2px}
  .card{grid-template-columns:40px 1fr auto;gap:10px;padding:10px}
  .card .ico{width:40px;height:40px}
  .contact .wrap{gap:20px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.e85bg,header.site,.lb{display:none}body{background:#fff;color:#000}}