/* Schriften lokal eingebunden (SIL Open Font License) */
@font-face{font-family:"IBM Plex Sans";src:url("../fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url("../fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url("../fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url("../fonts/ibm-plex-sans-latin-700-normal.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("../fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}

/* ===== Nordwärme SHK · Design „Vorlauf / Rücklauf“ (eigenständig) ===== */
:root,[data-stil="a"]{
  --white:#FFFFFF; --mist:#F3F6F8; --ink:#0F2433; --soft:#5A6B78; --line:#DCE3E8;
  --warm:#C23B24; --warm-l:#FF8A6B; --cool:#1A62BD; --cool-l:#7FB2F0; --g:clamp(16px,4vw,56px);
  --sans:"IBM Plex Sans",system-ui,sans-serif; --mono:"IBM Plex Mono",ui-monospace,monospace;
  /* Werte für den gemeinsamen Anfrage-Assistenten */
  --bg:#F3F6F8; --bg-alt:#E8EEF2; --surface:#FFFFFF; --ink-soft:#33485A; --muted:#5A6B78; --line-strong:#0F2433;
  --brand:#0F2433; --brand-hover:#1A62BD; --on-brand:#FFFFFF; --accent:#1A62BD; --accent-text:#1A62BD; --focus:#1A62BD;
  --font-display:"IBM Plex Sans",system-ui,sans-serif; --font-body:"IBM Plex Sans",system-ui,sans-serif; --font-label:"IBM Plex Mono",ui-monospace,monospace;
  --display-weight:600; --h-weight:600; --radius:4px; --radius-btn:4px; --radius-media:4px; --label-tracking:.04em; --label-weight:500;
  --dark-bg:#0F2433; --dark-ink:#FFFFFF; --dark-soft:#B9C6D0;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-padding-top:84px}
body{margin:0;background:var(--white);color:var(--ink);font:400 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
main{overflow-x:clip}
h1,h2,h3{font-family:var(--sans);font-weight:600;line-height:1.08;margin:0;letter-spacing:-.02em}
h2{font-size:clamp(30px,3.6vw,48px)}
p{margin:0}
.mono{font-family:var(--mono);font-weight:500}
.muted{color:var(--soft)}
:focus-visible{outline:3px solid var(--cool);outline-offset:3px}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:10px 16px;z-index:99}
.skip:focus{left:8px}
.ph{background:#FFF5D6;border:1px dashed #A07A00;padding:0 6px;border-radius:3px;color:var(--ink)}
.demo{margin:0;background:var(--ink);color:#C9D5DE;text-align:center;font:500 12.5px var(--mono);padding:7px 16px}
.tag{display:flex;align-items:center;gap:12px;font:500 13px/1.3 var(--mono);color:var(--soft);margin-bottom:16px}
.tag .mono{color:var(--ink);background:var(--mist);border:1px solid var(--line);padding:3px 7px;border-radius:3px}

/* Header */
.top{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:28px;padding:12px var(--g);background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;margin-right:auto}
.brand-mark{width:38px;height:38px}
.brand-word{font:600 22px/1 var(--sans);letter-spacing:-.02em}
.brand-word small{display:block;font:500 11px/1.4 var(--mono);color:var(--soft);letter-spacing:.02em;margin-top:3px}
#nav{display:flex;align-items:center;gap:26px}
#nav a{text-decoration:none;font-size:15px;font-weight:500}
#nav a:hover{color:var(--cool)}
#nav .nav-urgent{color:var(--warm)}
#nav .nav-cta{background:var(--ink);color:#fff;padding:11px 18px;border-radius:4px}
#nav .nav-cta:hover{background:var(--cool);color:#fff}
.menu-btn{display:none;background:none;border:1px solid var(--ink);border-radius:4px;padding:9px 14px;font:500 15px var(--sans);color:var(--ink);cursor:pointer}
@media(max-width:999px){
  .menu-btn{display:block}
  #nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:6px 16px 18px}
  #nav a{padding:14px 2px;border-bottom:1px solid var(--line);font-size:17px}
  #nav .nav-cta{margin-top:14px;text-align:center;border:0}
  .top.open #nav{display:flex}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 24px;border-radius:4px;text-decoration:none;font:600 16px/1 var(--sans);border:1.5px solid transparent;cursor:pointer;transition:all .2s}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:var(--cool)}
.btn-line{border-color:var(--ink);color:var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff}
.btn-white{background:#fff;color:var(--ink)}
.btn-white:hover{background:var(--mist)}

/* Hero */
.hero{display:grid;gap:48px;max-width:1440px;margin:0 auto;padding:clamp(48px,7vw,96px) var(--g) clamp(40px,5vw,72px);align-items:center}
@media(min-width:1000px){.hero{grid-template-columns:1.15fr .85fr;gap:80px}}
.hero h1{font-size:clamp(42px,5.4vw,80px);letter-spacing:-.035em;line-height:1.02}
.warm{color:var(--warm)}.cool{color:var(--cool)}
.lead{margin-top:24px;font-size:19px;color:var(--soft);max-width:52ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-urgent{margin-top:22px;font-size:15px;color:var(--soft)}
.hero-urgent a{color:var(--warm);font-weight:600}
.hero-media{position:relative;margin:0}
.hero-media img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:4px}
@media(max-width:999px){.hero-media img{aspect-ratio:4/3}}
.hero-media::before{content:"";position:absolute;left:-14px;top:24px;bottom:24px;width:6px;border-radius:3px;background:linear-gradient(var(--warm),var(--cool))}
.readings{position:absolute;right:16px;bottom:16px;display:flex;gap:8px}
.readings span{background:rgba(15,36,51,.88);color:#fff;border-radius:4px;padding:10px 14px;font:500 14px var(--mono);display:grid;gap:2px;min-width:104px}
.readings small{font-size:11px;color:#B9C6D0}
.readings b{font-size:26px;line-height:1}
.r-warm b{color:var(--warm-l)}.r-cool b{color:var(--cool-l)}

/* Eckdaten */
.facts{list-style:none;margin:0 auto;padding:0 var(--g);max-width:1440px;display:grid;gap:0}
@media(min-width:800px){.facts{grid-template-columns:2fr 1.2fr 1fr}}
.facts li{border-top:1px solid var(--ink);padding:16px 20px 18px 0;display:grid;gap:4px;font-weight:500}
.facts .mono{font-size:12px;color:var(--soft)}

/* Leitungen links als roter Faden */
.piped{position:relative;max-width:1440px;margin:0 auto;padding:0 var(--g) 0 calc(var(--g) + 72px)}
.piped::before,.piped::after{content:"";position:absolute;top:0;bottom:0;width:4px;border-radius:2px}
.piped::before{left:calc(var(--g) + 16px);background:repeating-linear-gradient(180deg,var(--warm) 0 22px,#E8826E 22px 30px)}
.piped::after{left:calc(var(--g) + 30px);background:repeating-linear-gradient(0deg,var(--cool) 0 22px,#6FA3E3 22px 30px)}
.block{position:relative;padding:clamp(64px,8vw,112px) 0 0}
.block-head{position:relative;max-width:760px;margin-bottom:clamp(28px,4vw,48px)}
.block-head h2{margin-bottom:10px}
.block-head::before{content:"";position:absolute;left:-60px;top:-2px;width:26px;height:26px;border-radius:50%;background:#fff;border:4px solid var(--ink)}
@media(max-width:800px){.piped{padding-left:var(--g)}.piped::before,.piped::after,.block-head::before{display:none}}

/* Leistungen */
.svc{display:grid;gap:18px}
@media(min-width:800px){.svc{grid-template-columns:1fr 1fr}}
.svc-card{display:grid;grid-template-columns:42% 1fr;text-decoration:none;background:var(--mist);border-radius:4px;overflow:hidden;border-bottom:4px solid var(--c);transition:transform .25s,box-shadow .25s}
.svc-card.warm{--c:var(--warm)}.svc-card.cool{--c:var(--cool)}
.svc-card:hover{transform:translateY(-3px);box-shadow:0 18px 30px -22px rgba(15,36,51,.6)}
.svc-card img{width:100%;height:100%;object-fit:cover;min-height:190px}
.svc-body{padding:22px;display:grid;gap:8px;align-content:center}
.svc-body b{font-size:22px;letter-spacing:-.01em}
.svc-body span{color:var(--soft);font-size:16px}
@media(max-width:560px){.svc-card{grid-template-columns:1fr}.svc-card img{aspect-ratio:16/9;min-height:0}}

/* Heizungs-Check */
.check-grid{display:grid;gap:28px;background:var(--mist);border:1px solid var(--line);border-radius:6px;padding:clamp(20px,3vw,40px)}
@media(min-width:1000px){.check-grid{grid-template-columns:1fr 1fr;gap:56px}}
.hc-form{display:grid;gap:26px;align-content:start}
fieldset{border:0;margin:0;padding:0}
legend{font:500 13px var(--mono);color:var(--soft);margin-bottom:10px;padding:0}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opts label{position:relative}
.opts input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.opts span{display:inline-flex;align-items:center;min-height:46px;padding:0 16px;border:1.5px solid #B7C4CE;border-radius:4px;background:#fff;font-weight:500}
.opts input:checked+span{border-color:var(--ink);background:var(--ink);color:#fff}
.opts input:focus-visible+span{outline:3px solid var(--cool);outline-offset:2px}
.sl label{display:flex;justify-content:space-between;font:500 13px var(--mono);color:var(--soft);margin-bottom:8px}
.sl output{font-size:20px;color:var(--ink)}
.sl input{width:100%;accent-color:var(--ink);height:28px}
.hc-out{display:grid;grid-template-columns:44px 1fr;gap:24px;background:#fff;border-radius:4px;padding:24px;border:1px solid var(--line)}
.thermo{position:relative;width:20px;margin:6px auto 0;border-radius:10px;background:var(--line);min-height:220px}
.thermo::after{content:"";position:absolute;left:50%;bottom:-14px;width:36px;height:36px;margin-left:-18px;border-radius:50%;background:var(--tc,var(--cool))}
.thermo-fill{position:absolute;left:0;right:0;bottom:0;border-radius:10px;height:var(--h,40%);background:linear-gradient(0deg,var(--cool),var(--tc,var(--cool)));transition:height .7s cubic-bezier(.2,.8,.2,1)}
.hc-age{font-size:30px;margin-bottom:10px}
.hc-list{list-style:none;margin:0 0 20px;padding:0;display:grid;gap:10px}
.hc-list li{position:relative;padding-left:22px;font-size:16px}
.hc-list li::before{content:"";position:absolute;left:0;top:8px;width:10px;height:10px;border-radius:2px;background:var(--dot,var(--soft))}
.hc-list li.w{--dot:var(--warm)}.hc-list li.c{--dot:var(--cool)}.hc-list li.ok{--dot:#2E8B57}
.fine{margin-top:14px;font-size:13px;color:var(--soft);max-width:80ch}

/* Ablauf */
.flow{list-style:none;margin:0;padding:0;display:grid;gap:0;border-top:1px solid var(--ink)}
@media(min-width:900px){.flow{grid-template-columns:repeat(4,1fr)}}
.flow li{padding:22px 22px 26px 0;border-bottom:1px solid var(--line);color:var(--soft)}
@media(min-width:900px){.flow li{border-bottom:0;border-right:1px solid var(--line);padding-left:22px}.flow li:first-child{padding-left:0}.flow li:last-child{border-right:0}}
.flow .mono{display:block;font-size:13px;color:var(--warm);margin-bottom:10px}
.flow b{display:block;font-size:20px;color:var(--ink);margin-bottom:6px}

/* Fälle */
.cases{display:grid;gap:18px}
@media(min-width:900px){.cases{grid-template-columns:repeat(3,1fr)}}
.cases article{border:1px solid var(--line);border-radius:4px;padding:26px;background:#fff;position:relative}
.cases article::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:linear-gradient(90deg,var(--warm),var(--cool));border-radius:4px 4px 0 0}
.case-n{font-size:12px;color:var(--soft);margin-bottom:10px}
.cases h3{font-size:22px;margin-bottom:16px}
.cases dl{margin:0;display:grid;gap:4px}
.cases dt{font:500 12px var(--mono);color:var(--soft);margin-top:8px}
.cases dd{margin:0}

/* Notdienst */
.sos-inner{background:var(--ink);color:#DDE6EC;border-radius:6px;padding:clamp(28px,4vw,52px);display:grid;gap:32px}
@media(min-width:1000px){.sos-inner{grid-template-columns:.9fr 1.1fr;gap:56px}}
.sos .tag{color:#B9C6D0}
.sos .tag .mono{background:transparent;color:#fff;border-color:#3B5466}
.sos h2{color:#fff}
.sos-phone{margin-top:18px;font:600 26px var(--sans)}
.sos-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.sos-list li{padding:16px 18px;background:#183447;border-radius:4px;border-left:4px solid var(--warm-l)}
.sos-list b{color:#fff}

/* FAQ */
.faq-block{padding-bottom:clamp(64px,8vw,112px)}
.faq{max-width:900px;border-top:1px solid var(--ink)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:600;font-size:18px;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:500 22px var(--mono);color:var(--cool)}
.faq details[open] summary::after{content:"−"}
.faq p{padding-bottom:18px;color:var(--soft)}
.quote{margin:36px 0 0;max-width:900px;font:500 22px/1.45 var(--sans);padding-left:20px;border-left:4px solid var(--line)}
.quote cite{display:block;margin-top:10px;font:500 12px var(--mono);font-style:normal;color:var(--soft)}

/* Abschluss */
.final{background:linear-gradient(110deg,#7A2416,var(--warm) 30%,#3C4E8A 65%,var(--cool));color:#fff;text-align:center;padding:clamp(72px,9vw,120px) var(--g)}
.final h2{font-size:clamp(34px,4.6vw,64px)}
.final p{margin:16px auto 0;max-width:46ch;font-size:18px;color:#EEF3F7}
.final-actions{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:18px;margin-top:28px}

/* Footer */
.foot{display:grid;gap:22px;padding:44px var(--g) 110px;max-width:1440px;margin:0 auto;font-size:15px;color:var(--soft)}
@media(min-width:1000px){.foot{grid-template-columns:1.3fr 1fr auto;padding-bottom:44px}}
.foot .brand-word{color:var(--ink)}
.foot p{margin-top:8px}
.foot nav{display:flex;gap:20px}

/* Mobile-CTA */
.m-cta{position:fixed;left:12px;right:12px;bottom:12px;z-index:40;display:flex;justify-content:center;align-items:center;min-height:54px;background:var(--ink);color:#fff;text-decoration:none;font-weight:600;border-radius:4px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
@media(min-width:1000px){.m-cta{display:none}}

/* Bewegung */
@media (prefers-reduced-motion:no-preference){
  .piped::before{animation:flowdown 1.6s linear infinite}
  .piped::after{animation:flowup 1.6s linear infinite}
  @keyframes flowdown{to{background-position:0 30px}}
  @keyframes flowup{to{background-position:0 -30px}}
  .hero-text>*{animation:up .8s cubic-bezier(.2,.8,.2,1) both}
  .hero-text>:nth-child(2){animation-delay:.08s}.hero-text>:nth-child(3){animation-delay:.16s}.hero-text>:nth-child(4){animation-delay:.24s}
  .hero-media{animation:up 1s cubic-bezier(.2,.8,.2,1) .2s both}
  .readings span{animation:up .6s ease-out 1s both}.readings span+span{animation-delay:1.15s}
  @keyframes up{from{opacity:0;transform:translateY(22px)}}
  .js .rv{opacity:0;transform:translateY(22px);transition:opacity .6s ease var(--d,0ms),transform .6s cubic-bezier(.2,.8,.2,1) var(--d,0ms)}
  .js .rv.in{opacity:1;transform:none}
}

/* Unterseiten */
.page-anfrage .wizard__panel{border-top:4px solid;border-image:linear-gradient(90deg,var(--warm),var(--cool)) 1}
.page-anfrage .progress li[data-state="done"]::before,.page-anfrage .progress li[data-state="current"]::before{background:var(--cool)}
@media(max-width:560px){.hc-out{grid-template-columns:22px 1fr;gap:16px;padding:18px}.thermo{width:12px}.thermo::after{width:24px;height:24px;margin-left:-12px;bottom:-10px}.hc-age{font-size:24px}.hero-media::before{left:-10px;width:4px}}