/* lkwelt.de · Stylesheet */

@font-face{font-family:"Barlow Condensed";font-weight:600;font-style:normal;font-display:swap;src:url("fonts/barlow-condensed-latin-600-normal.woff2") format("woff2")}
@font-face{font-family:"Barlow Condensed";font-weight:700;font-style:normal;font-display:swap;src:url("fonts/barlow-condensed-latin-700-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:400;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:400;font-style:italic;font-display:swap;src:url("fonts/ibm-plex-sans-latin-400-italic.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:500;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:600;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:400;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:500;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2")}

:root{
  --blau:#0E518D;          /* Verkehrsblau, wie die Autobahnschilder */
  --blau-tief:#0A3B68;
  --nacht:#0C1F33;
  --amber:#F2A900;         /* Begrenzungsleuchte */
  --amber-weich:#FFE3A1;
  --asphalt:#262B30;
  --text:#22272B;
  --text-2:#545C63;
  --linie:#CDD2D5;
  --flaeche:#EEF0EF;
  --papier:#FAFAF8;
  --weiss:#fff;
  --warn:#9A3B12;
  --warn-flaeche:#FBEDE4;
  --kopf:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --lauf:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  --breit:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--papier);color:var(--text);font:400 17px/1.6 var(--lauf);overflow-x:hidden}
img,svg{max-width:100%;display:block}
a{color:var(--blau);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px}
h1,h2,h3{font-family:var(--kopf);font-weight:700;line-height:1.05;letter-spacing:.005em;margin:0 0 .4em;color:var(--asphalt)}
h1{font-size:clamp(2.4rem,6vw,4.4rem)}
h2{font-size:clamp(1.9rem,3.6vw,2.8rem)}
h3{font-size:1.5rem;font-weight:600}
p{margin:0 0 1em}
.wrap{max-width:var(--breit);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:8px;background:var(--amber);color:#000;padding:8px 12px;z-index:100}
.skip:focus{left:8px}
.mono{font-family:var(--mono);font-size:.82em;letter-spacing:.02em}
.leise{color:var(--text-2)}

/* Kopfzeile */
.kopf{position:sticky;top:0;z-index:50;background:rgba(250,250,248,.94);backdrop-filter:saturate(1.4) blur(8px);-webkit-backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--linie)}
.kopf .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:inline-flex;align-items:center;text-decoration:none}
.logo-schild{display:inline-block;background:var(--blau);color:#fff;font:700 1.45rem/1 var(--kopf);letter-spacing:.06em;text-transform:uppercase;padding:7px 12px 6px;border-radius:5px;box-shadow:inset 0 0 0 2px var(--blau),inset 0 0 0 3.5px #fff}
.logo-schild b{color:var(--amber);font-weight:700}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
.nav a{display:block;padding:8px 12px;color:var(--asphalt);text-decoration:none;font:600 1.12rem/1 var(--kopf);letter-spacing:.03em;text-transform:uppercase;border-bottom:3px solid transparent}
.nav a:hover,.nav a[aria-current="page"]{border-bottom-color:var(--amber)}
.nav-knopf{display:none;background:none;border:1px solid var(--linie);border-radius:4px;padding:8px 12px;font:600 1rem/1 var(--kopf);letter-spacing:.06em;text-transform:uppercase;color:var(--asphalt)}
@media (max-width:820px){
  .nav-knopf{display:block}
  .nav{position:absolute;left:0;right:0;top:64px;background:var(--papier);border-bottom:1px solid var(--linie);display:none}
  .nav.offen{display:block}
  .nav ul{flex-direction:column;padding:8px 12px 16px}
  .nav a{padding:14px 8px;font-size:1.3rem;border-bottom:1px solid var(--flaeche)}
}

/* Hero */
.hero{position:relative;background:#081626;color:#fff;overflow:hidden;isolation:isolate}
.hero-szene{position:absolute;inset:0;z-index:-1}
.hero-szene svg{width:100%;height:100%}
.hero .wrap{padding-top:56px;padding-bottom:300px;min-height:560px}
.hero h1{color:#fff;max-width:13ch}
.hero .lead{max-width:40ch;font-size:1.12rem;color:#D6DEE6}
.hero .eckdaten{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:20px;font-family:var(--mono);font-size:.82rem;color:#AFC0D1}
.hero .eckdaten span::before{content:"";display:inline-block;width:8px;height:8px;background:var(--amber);margin-right:8px;border-radius:1px;vertical-align:1px}
@media (min-width:980px){.hero .wrap{padding-bottom:80px;min-height:600px}.hero .hero-text{max-width:600px}.hero h1{font-size:clamp(2.6rem,4.2vw,3.7rem);max-width:none}.hero .lead{max-width:44ch}}
@media (max-width:979px){
  .hero-szene{top:auto;height:330px}
  .hero-szene svg{position:absolute;bottom:0;height:330px;width:880px;max-width:none;left:calc(50% - 612px)}
  .hero .wrap{padding-bottom:320px;min-height:0}
}

.seitenkopf{background:var(--blau);color:#fff;position:relative;overflow:hidden}
.seitenkopf .wrap{padding-top:44px;padding-bottom:40px}
.seitenkopf h1{color:#fff;max-width:18ch}
.seitenkopf p{max-width:60ch;color:#DCE7F2}
.seitenkopf .pfad{font-family:var(--mono);font-size:.8rem;margin-bottom:18px;color:#BCD0E4}
.seitenkopf .pfad a{color:#fff}
.seitenkopf::after{content:"";position:absolute;left:0;right:0;bottom:0;height:6px;background:repeating-linear-gradient(90deg,#fff 0 48px,transparent 48px 96px);opacity:.85;animation:fahrbahn 1.6s linear infinite}
@keyframes fahrbahn{to{background-position:-96px 0}}

/* Anzeige-Hinweis */
.hinweis-anzeige{background:var(--flaeche);border-top:1px solid var(--linie);border-bottom:1px solid var(--linie);font-size:.92rem}
.hinweis-anzeige .wrap{padding-top:12px;padding-bottom:12px;display:flex;gap:12px;align-items:baseline;flex-wrap:wrap}
.etikett{display:inline-block;font:500 .7rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;border:1px solid currentColor;padding:3px 5px 2px;border-radius:2px}

/* Abschnitte */
.abschnitt{padding:72px 0}
.abschnitt.grau{background:var(--flaeche)}
.km{display:inline-flex;align-items:center;gap:10px;font:500 .8rem/1 var(--mono);color:var(--text-2);letter-spacing:.06em;text-transform:uppercase;margin-bottom:14px}
.km i{font-style:normal;display:inline-block;background:#fff;border:1.5px solid var(--asphalt);color:var(--asphalt);padding:4px 6px 3px;border-radius:2px;font-weight:500}
.spalten{display:grid;gap:40px}
@media (min-width:900px){.spalten{grid-template-columns:5fr 7fr;align-items:start}}

/* Wegweiser */
.wegweiser{display:grid;gap:18px;margin-top:28px}
@media (min-width:760px){.wegweiser{grid-template-columns:1fr 1fr}}
.schild{display:block;background:var(--blau);color:#fff;text-decoration:none;border-radius:8px;padding:22px 24px 24px;box-shadow:inset 0 0 0 3px var(--blau),inset 0 0 0 5px #fff;position:relative;transition:transform .25s ease,background-color .25s}
.schild:hover{background:var(--blau-tief);transform:translateY(-3px)}
.schild .ziel{display:flex;justify-content:space-between;align-items:center;gap:16px;font:700 clamp(1.9rem,4vw,2.6rem)/1 var(--kopf);letter-spacing:.02em}
.schild .pfeil{flex:none;width:44px;height:44px;transition:transform .3s ease}
.schild:hover .pfeil{transform:translateX(6px)}
.schild .unter{margin-top:12px;font-size:.98rem;color:#DCE7F2;max-width:42ch}
.schild .zahl{position:absolute;top:-12px;right:22px;background:var(--amber);color:#1b1b1b;font:500 .78rem/1 var(--mono);padding:6px 8px;border-radius:2px}

/* Kabine */
.kabine-bild{background:#fff;border:1px solid var(--linie);border-radius:6px;padding:12px}
.kabine-bild svg{width:100%;height:auto}
.legende{list-style:none;margin:20px 0 0;padding:0;counter-reset:l;display:grid;gap:2px}
.legende li{counter-increment:l}
.legende a{display:flex;gap:14px;align-items:baseline;padding:10px 4px;border-bottom:1px solid var(--linie);text-decoration:none;color:var(--text)}
.legende a::before{content:counter(l);flex:none;display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--blau);color:#fff;font:600 .95rem/1 var(--kopf)}
.legende a.warm::before{background:var(--amber);color:#1b1b1b}
.legende a:hover strong{text-decoration:underline}
.legende small{display:block;color:var(--text-2);font-size:.88rem}
.hotspot{cursor:pointer}
.hotspot .ring{transform-box:fill-box;transform-origin:center;animation:puls 2.4s ease-out infinite}
.hotspot:hover .kreis,.hotspot:focus .kreis{fill:var(--blau-tief)}
@keyframes puls{0%{transform:scale(1);opacity:.7}80%,100%{transform:scale(2.1);opacity:0}}
.luefter{transform-box:view-box;animation:dreh 1.2s linear infinite}
@keyframes dreh{to{transform:rotate(360deg)}}
.warmluft circle{animation:steigen 3s ease-in infinite;opacity:0}
.warmluft circle:nth-child(2){animation-delay:1s}
.warmluft circle:nth-child(3){animation-delay:2s}
@keyframes steigen{0%{transform:translate(0,0);opacity:0}20%{opacity:.9}100%{transform:translate(26px,-90px);opacity:0}}

/* Ratgeber-Teaser */
.teaser-liste{display:grid;gap:0;margin-top:24px;border-top:2px solid var(--asphalt)}
.teaser{display:grid;gap:6px;padding:22px 0;border-bottom:1px solid var(--linie);text-decoration:none;color:var(--text)}
@media (min-width:760px){.teaser{grid-template-columns:160px 1fr auto;gap:24px;align-items:baseline}}
.teaser .art{font:500 .78rem/1.3 var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--text-2)}
.teaser h3{margin:0;font-size:1.7rem;transition:color .2s}
.teaser p{margin:4px 0 0;color:var(--text-2)}
.teaser .weiter{font:600 1rem/1 var(--kopf);text-transform:uppercase;letter-spacing:.05em;color:var(--blau)}
.teaser:hover h3{color:var(--blau)}

/* Gruppen-Navigation */
.gruppen-nav{position:sticky;top:64px;z-index:40;background:var(--papier);border-bottom:1px solid var(--linie)}
.gruppen-nav ul{list-style:none;margin:0;padding:10px 0;display:flex;gap:6px;overflow-x:auto;scrollbar-width:none}
.gruppen-nav ul::-webkit-scrollbar{display:none}
.gruppen-nav a{display:block;white-space:nowrap;padding:8px 12px;border:1px solid var(--linie);border-radius:3px;text-decoration:none;color:var(--asphalt);font:600 1rem/1 var(--kopf);letter-spacing:.04em;text-transform:uppercase;background:#fff;transition:background .2s,color .2s,border-color .2s}
.gruppen-nav a.aktiv{background:var(--blau);color:#fff;border-color:var(--blau)}

/* Produktgruppen */
.gruppe{padding:56px 0 24px}
.gruppe-kopf{display:grid;gap:16px;margin-bottom:22px}
@media (min-width:900px){.gruppe-kopf{grid-template-columns:auto 1fr;align-items:start;column-gap:22px}}
.gruppe-icon{width:58px;height:58px;color:var(--blau)}
.gruppe-kopf h2{margin-bottom:.25em}
.gruppe-kopf p{max-width:70ch;margin:0}
.tipp{margin:18px 0 6px;padding:14px 16px;border-left:4px solid var(--amber);background:#fff;font-size:.95rem;max-width:80ch}
.tipp strong{font-family:var(--kopf);font-size:1.15rem;letter-spacing:.02em;text-transform:uppercase;display:block;margin-bottom:2px}
.warnung{border-left-color:var(--warn);background:var(--warn-flaeche)}
.warnung strong{color:var(--warn)}

.produkte{list-style:none;margin:0;padding:0;border-top:2px solid var(--asphalt)}
.produkt{display:grid;gap:14px;padding:24px 0;border-bottom:1px solid var(--linie)}
@media (min-width:900px){.produkt{grid-template-columns:104px minmax(0,1.25fr) minmax(0,1fr) 210px;gap:26px;align-items:start}}
.produkt .bild{position:relative;width:104px;height:104px;border-radius:6px;background:var(--nacht);display:grid;place-items:center;overflow:hidden}
.produkt .bild::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--amber)}
.bild-icon{width:56px;height:56px;color:#fff;transition:transform .35s}
.produkt:hover .bild-icon{transform:scale(1.1) rotate(-3deg)}
.produkt .nr{position:absolute;left:8px;top:6px;font:500 .72rem/1 var(--mono);color:#9FB6CC}
.wertung{display:flex;flex-wrap:wrap;align-items:center;gap:4px 10px;margin-top:12px;font-size:.86rem;color:var(--text-2)}
.wertung b{font:600 .8rem/1 var(--mono);color:var(--text)}
.wertung>span:last-child{flex-basis:100%}
.pips{display:inline-flex;gap:3px}
.pips i{width:16px;height:7px;border-radius:1px;background:var(--linie)}
.pips i.v{background:var(--amber)}
.pips i.h{background:linear-gradient(90deg,var(--amber) 50%,var(--linie) 50%)}
.bildhinweis{font-size:.8rem;color:var(--text-2);margin:14px 0 0;max-width:80ch}
.produkt .marke{font:500 .78rem/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--text-2);margin-bottom:6px}
.produkt h3{font-size:1.55rem;margin:0 0 8px}
.produkt .wozu{margin:0;color:var(--text)}
.typenschild{margin:0;border:1.5px solid var(--asphalt);border-radius:3px;background:#fff;font-family:var(--mono);font-size:.82rem;line-height:1.45}
.typenschild div{display:flex;gap:10px;padding:7px 10px;border-bottom:1px solid var(--linie)}
.typenschild div:last-child{border-bottom:0}
.typenschild div::before{content:"";flex:none;width:6px;height:6px;margin-top:6px;background:var(--blau);border-radius:50%}
.typenschild .quelle{font-size:.72rem;color:var(--text-2);background:var(--flaeche)}
.typenschild .quelle::before{display:none}
.kauf{display:flex;flex-direction:column;gap:8px}
.knopf{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--asphalt);color:#fff;text-decoration:none;padding:13px 14px;border-radius:4px;font:600 1.08rem/1 var(--kopf);letter-spacing:.04em;text-transform:uppercase;transition:background .2s}
.knopf:hover{background:var(--blau)}
.knopf .etikett{border-color:#9AA4AC;color:#C9D0D6;font-size:.62rem}
.kauf small{font-size:.78rem;color:var(--text-2);line-height:1.4}
.produkt.mit-warnung .typenschild{border-color:var(--warn)}
.produkt .achtung{margin:10px 0 0;font-size:.88rem;color:var(--warn);padding-left:12px;border-left:2px solid var(--warn)}
.genehmigung{display:inline-block;margin-top:10px;font:500 .74rem/1.3 var(--mono);padding:4px 6px;border-radius:2px;background:#E3EEF8;color:var(--blau-tief)}
.genehmigung.nein{background:var(--warn-flaeche);color:var(--warn)}

/* Schema-Grafik Heizung */
.schema{background:var(--nacht);border-radius:6px;padding:14px;color:#fff}
.schema svg{width:100%;height:auto}
.fluss{stroke-dasharray:6 10;animation:fliessen 1.2s linear infinite}
.fluss.langsam{animation-duration:2.4s}
@keyframes fliessen{to{stroke-dashoffset:-32}}
.flamme{transform-box:fill-box;transform-origin:50% 100%;animation:flackern .5s ease-in-out infinite alternate}
@keyframes flackern{from{transform:scaleY(.86)}to{transform:scaleY(1.08)}}

/* Artikel */
.artikel{max-width:720px;margin:0 auto;padding:56px 20px 40px}
.artikel h2{margin-top:1.6em;font-size:2.1rem}
.artikel h3{margin-top:1.3em}
.artikel ul,.artikel ol{padding-left:1.2em}
.artikel li{margin-bottom:.4em}
.artikel blockquote{margin:1.4em 0;padding:4px 0 4px 18px;border-left:3px solid var(--blau);color:var(--text-2)}
.artikel table{width:100%;border-collapse:collapse;font-size:.92rem;margin:1em 0 1.6em}
.artikel th,.artikel td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--linie);vertical-align:top}
.artikel th{font-family:var(--kopf);font-size:1.05rem;letter-spacing:.03em;text-transform:uppercase;border-bottom:2px solid var(--asphalt)}
.tabelle-scroll{overflow-x:auto}
.quellen{font-size:.88rem;color:var(--text-2);border-top:1px solid var(--linie);margin-top:2.4em;padding-top:1em}
.quellen ol{padding-left:1.2em}
.stand{font:500 .8rem/1.4 var(--mono);color:var(--text-2)}
.fortschritt{position:fixed;left:0;right:0;top:64px;height:14px;z-index:45;pointer-events:none}
.fortschritt .bahn{position:absolute;left:0;right:0;top:6px;height:2px;background:repeating-linear-gradient(90deg,var(--linie) 0 14px,transparent 14px 24px)}
.fortschritt svg{position:absolute;top:0;left:0;width:30px;height:14px;transform:translateX(calc(var(--p,0) * (100vw - 34px)))}

/* Rechtstexte */
.recht{max-width:760px;margin:0 auto;padding:48px 20px 64px}
.recht h2{font-size:1.7rem;margin-top:1.6em}
.platzhalter{background:#FFF3C4;padding:0 4px;border-radius:2px}

/* Fußzeile */
.fuss{background:var(--asphalt);color:#C3CAD0;font-size:.92rem;margin-top:0}
.fuss .wrap{padding-top:48px;padding-bottom:36px;display:grid;gap:28px}
@media (min-width:820px){.fuss .wrap{grid-template-columns:1.4fr 1fr 1fr}}
.fuss a{color:#fff}
.fuss h3{color:#fff;font-size:1.2rem;letter-spacing:.05em;text-transform:uppercase}
.fuss ul{list-style:none;margin:0;padding:0}
.fuss li{margin-bottom:6px}
.fuss .partner{border:1px solid #4A535B;padding:12px 14px;border-radius:3px;color:#E6EAEE}
.fuss .klein{grid-column:1/-1;border-top:1px solid #3B434A;padding-top:18px;font-family:var(--mono);font-size:.75rem;color:#8E99A2}

/* Einblenden beim Scrollen */
.einblenden{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.einblenden.sichtbar{opacity:1;transform:none}
.no-js .einblenden{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .einblenden{opacity:1;transform:none}
}

/* Video */
.video-spalten{align-items:center}
@media (min-width:900px){.video-spalten{grid-template-columns:minmax(0,5fr) minmax(0,6fr)}}
.video-rahmen{margin:0;max-width:520px;border-radius:8px;overflow:hidden;background:var(--nacht);aspect-ratio:1/1}
.video-rahmen video{display:block;width:100%;height:100%;object-fit:cover}