/* diesel-tankstelle.de – SENSOR TECHNIK Ratgeber
   Arculat: Montserrat, navy #1A2140, kék #0071E8, kártya #EEEEF4, 22px rádiusz */
@font-face{font-family:Montserrat;font-weight:400;font-display:swap;src:url(/assets/fonts/montserrat-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:Montserrat;font-weight:500;font-display:swap;src:url(/assets/fonts/montserrat-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:Montserrat;font-weight:700;font-display:swap;src:url(/assets/fonts/montserrat-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:Montserrat;font-weight:800;font-display:swap;src:url(/assets/fonts/montserrat-latin-800-normal.woff2) format("woff2")}

:root{
  --navy:#1A2140;--navy-2:#252d55;--blue:#0071E8;--blue-d:#005bbb;
  --card:#EEEEF4;--line:#dcdce6;--text:#3A3F4B;--muted:#6b7080;--bg:#fff;
  --ok:#1f8a4c;--warn:#b26a00;--r:22px;--gap:8px;--max:1120px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:Montserrat,Arial,sans-serif;font-size:16px;line-height:1.65;color:var(--text);background:var(--bg)}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue)}
a:hover{color:var(--blue-d)}
h1,h2,h3{color:var(--navy);line-height:1.2;margin:0 0 .5em}
h1{font-size:clamp(28px,4.4vw,44px);font-weight:800;letter-spacing:-.01em}
h2{font-size:clamp(22px,3vw,28px);font-weight:800;margin-top:1.6em}
h3{font-size:18px;font-weight:700}
p{margin:0 0 1em}
ul,ol{padding-left:1.25em;margin:0 0 1em}
li{margin:.25em 0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px;top:0}
.skip:focus{left:16px;top:8px;background:#fff;padding:8px 12px;border-radius:8px;z-index:99}

/* Topbar + header */
.topbar{background:var(--navy);color:#c9cde0;font-size:13px}
.topbar .wrap{display:flex;gap:16px;justify-content:flex-end;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.topbar a{color:#fff;text-decoration:none}
.site-head{background:var(--navy);position:sticky;top:0;z-index:20;border-top:1px solid rgba(255,255,255,.08)}
.site-head .wrap{display:flex;align-items:center;gap:24px;min-height:68px}
.brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;font-weight:700;white-space:nowrap}
.brand img{height:30px;width:auto}
.brand span{font-size:15px;opacity:.9}
.nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.nav a{color:#fff;text-decoration:none;font-weight:500;font-size:14px;padding:8px 12px;border-radius:999px}
.nav a:hover,.nav a[aria-current=page]{background:rgba(255,255,255,.12);color:#fff}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid rgba(255,255,255,.35);color:#fff;border-radius:999px;padding:8px 14px;font:inherit;font-size:14px}
@media (max-width:900px){
  .menu-btn{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--navy);flex-direction:column;padding:8px 16px 16px;margin:0}
  .nav.open{display:flex}
  .topbar .wrap{justify-content:center;gap:10px}
  .topbar .hide-sm{display:none}
  .site-head .wrap{gap:12px}
  .brand{min-width:0}
  .brand span{overflow:hidden;text-overflow:ellipsis}
  .menu-btn{flex:none}
}
@media (max-width:440px){.brand img{height:24px}.brand span{font-size:13px}}

/* Breadcrumb */
.crumbs{font-size:13px;color:var(--muted);padding-top:20px}
.crumbs a{color:var(--muted)}

/* Hero */
.hero{padding:48px 0 32px}
.hero .lead{font-size:18px;max-width:760px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--blue);text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}
.btns{display:flex;gap:var(--gap);flex-wrap:wrap;margin-top:20px}
.btn{display:inline-block;background:var(--blue);color:#fff;text-decoration:none;font-weight:700;padding:13px 22px;border-radius:var(--r);border:0;font:inherit;font-weight:700;cursor:pointer}
.btn:hover{background:var(--blue-d);color:#fff}
.btn.ghost{background:var(--card);color:var(--navy)}
.btn.ghost:hover{background:#e2e2ec;color:var(--navy)}

/* Cards / grids */
.card{background:var(--card);border-radius:var(--r);padding:24px}
.card h3{margin-top:0}
.card > :last-child{margin-bottom:0}
.grid{display:grid;gap:var(--gap)}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:860px){.g3{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.g2,.g3{grid-template-columns:1fr}}
a.card{text-decoration:none;color:var(--text);display:block;transition:transform .15s,background .15s}
a.card:hover{background:#e6e6f0;transform:translateY(-2px)}
a.card .more{color:var(--blue);font-weight:700;font-size:14px}
.num{font-size:34px;font-weight:800;color:var(--navy);line-height:1}
.section{padding:24px 0}
.section.tint{background:#f7f7fa;margin-top:32px;padding:40px 0}

/* Article layout */
.article{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start;padding-bottom:40px}
.article .body{max-width:760px}
.aside{position:sticky;top:92px;display:grid;gap:var(--gap)}
@media (max-width:960px){.article{grid-template-columns:1fr}.aside{position:static}}
.toc a{display:block;text-decoration:none;font-size:14px;padding:3px 0}
.note{border-left:4px solid var(--blue);background:#f2f7fe;padding:14px 18px;border-radius:0 14px 14px 0;font-size:15px;margin:1.2em 0}
.note.warn{border-color:var(--warn);background:#fdf6ec}
.small{font-size:13px;color:var(--muted)}
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;position:relative;padding-left:46px;margin:14px 0}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;background:var(--navy);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:14px}

/* Stufen-Leiter (visuell statt Tabelle) */
.ladder{display:grid;gap:var(--gap);margin:1em 0}
.rung{display:grid;grid-template-columns:72px 1fr;gap:16px;align-items:center;background:var(--card);border-radius:var(--r);padding:14px 18px}
.rung b{display:flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:16px;color:#fff;font-size:22px;font-weight:800}
.rung.a b{background:#5b9b6b}.rung.b b{background:#d49a2a}.rung.c b{background:#d06a2a}.rung.d b{background:#b23b3b}
.rung strong{color:var(--navy)}

/* Tools (Rechner) */
.tool{background:var(--card);border-radius:var(--r);padding:24px;margin:1.2em 0}
.tool h3{margin-top:0}
.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 16px}
@media (max-width:620px){.fields{grid-template-columns:1fr}}
.field label{display:block;font-size:13px;font-weight:700;color:var(--navy);margin-bottom:4px}
.field input,.field select{width:100%;font:inherit;font-size:16px;padding:11px 14px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--text)}
.field .hint{font-size:12px;color:var(--muted);margin-top:3px}
.result{margin-top:18px;background:#fff;border-radius:18px;padding:20px}
.result .big{font-size:30px;font-weight:800;color:var(--blue);line-height:1.1}
.result .lbl{font-size:13px;color:var(--muted)}
.kpis{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
@media (max-width:620px){.kpis{grid-template-columns:1fr}}
.bars{margin-top:16px;display:grid;gap:10px}
.bar{display:grid;grid-template-columns:150px 1fr 110px;gap:10px;align-items:center;font-size:14px}
@media (max-width:620px){.bar{grid-template-columns:1fr;gap:4px}}
.bar .track{height:14px;background:#eceef4;border-radius:999px;overflow:hidden}
.bar .fill{height:100%;border-radius:999px;background:var(--blue);transition:width .35s}
.bar .fill.navy{background:var(--navy)}
.bar .fill.grey{background:#9aa0b4}
.bar .v{text-align:right;font-weight:700;color:var(--navy)}
.pill{display:inline-block;font-size:13px;font-weight:700;border-radius:999px;padding:4px 12px;margin:2px 4px 2px 0}
.pill.yes{background:#fdecea;color:#a33}
.pill.no{background:#e8f5ec;color:var(--ok)}

/* CTA band */
.cta{background:var(--navy);color:#dfe2ef;border-radius:var(--r);padding:32px;margin:32px 0}
.cta h2,.cta h3{color:#fff;margin-top:0}
.cta .btn.ghost{background:rgba(255,255,255,.12);color:#fff}
.cta .btn.ghost:hover{background:rgba(255,255,255,.2)}
.cta a:not(.btn){color:#fff}

/* FAQ */
.faq details{background:var(--card);border-radius:18px;padding:14px 20px;margin:var(--gap) 0}
.faq summary{cursor:pointer;font-weight:700;color:var(--navy);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;font-weight:800;color:var(--blue)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:10px 0 0}

/* Checkliste */
.check{list-style:none;padding:0}
.check li{display:flex;gap:12px;align-items:flex-start;background:var(--card);border-radius:16px;padding:12px 16px;margin:var(--gap) 0}
.check input{width:20px;height:20px;margin-top:3px;accent-color:var(--blue);flex:none}
@media print{
  .topbar,.site-head,.site-foot,.no-print,.aside,.crumbs{display:none!important}
  .article{display:block}
  .check li{background:none;border:1px solid #ccc;break-inside:avoid}
  body{font-size:12px}
}

/* Footer */
.site-foot{background:var(--navy);color:#c9cde0;margin-top:48px;padding:40px 0 24px;font-size:14px}
.site-foot a{color:#fff;text-decoration:none}
.site-foot a:hover{text-decoration:underline}
.site-foot h2{color:#fff;font-size:15px;margin:0 0 10px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
@media (max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}
.foot-grid img{height:22px;width:auto;margin-bottom:12px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:16px;font-size:12px}

/* v2 – SEO/GEO kiegészítések */
.kurz{background:#f2f7fe;border:1px solid #d6e6fb;border-radius:var(--r);padding:20px 24px;margin:0 0 8px}
.kurz h2{font-size:18px;margin:0 0 8px}
.kurz ul{margin:0}
.src{font-size:14px}
.src a{word-break:break-word}
.aside-h{font-size:18px;font-weight:700;color:var(--navy);margin:0 0 .5em;line-height:1.2}
.foot-h{color:#fff;font-size:15px;font-weight:700;margin:0 0 10px}
.faq summary h3{display:inline;font-size:16px;margin:0;color:var(--navy)}