:root{--night:#050c16;--navy:#07182d;--navy2:#092344;--blue:#064bc4;--blue2:#0b62e6;--orange:#f36b00;--orange2:#ff7a00;--white:#fff;--ink:#0a1627;--muted:#657185;--soft:#f3f5f8;--line:#dfe4ea;--radius:14px;--shadow:0 18px 45px rgba(3,12,25,.14);--container:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.6}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.container{width:min(calc(100% - 36px),var(--container));margin:auto}.topbar{background:var(--night);color:#dce6f5;border-bottom:1px solid rgba(255,255,255,.08);font-size:12px}.topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}.emergency-link{color:#fff}.emergency-link:first-letter{color:var(--orange)}.site-header{position:sticky;top:0;z-index:50;background:rgba(5,12,22,.97);border-bottom:1px solid rgba(255,255,255,.07);backdrop-filter:blur(12px)}.site-header.scrolled{box-shadow:0 12px 35px rgba(0,0,0,.22)}.header-inner{min-height:92px;display:flex;align-items:center;gap:28px}.brand{margin-right:auto}.custom-logo,.fallback-logo{display:block;max-height:72px;width:auto}.fallback-logo{max-width:220px}.nav-list{list-style:none;display:flex;gap:22px;padding:0;margin:0;align-items:center}.nav-list a{font-size:14px;font-weight:750;color:#eef4ff}.nav-list a:hover{color:var(--orange)}.nav-toggle{display:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:50px;padding:0 23px;border-radius:6px;font-weight:900;letter-spacing:.01em;transition:.2s;border:1px solid transparent}.btn:hover{transform:translateY(-2px)}.btn-orange{background:var(--orange);color:#fff;box-shadow:0 8px 22px rgba(243,107,0,.22)}.btn-blue{background:var(--blue);color:#fff}.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff;background:rgba(255,255,255,.04)}.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 78% 43%,rgba(6,75,196,.34),transparent 34%),linear-gradient(115deg,var(--night),var(--navy) 68%,#061125);color:#fff;min-height:650px;display:grid;align-items:center}.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(90deg,black,transparent)}.hero-grid{position:relative;display:grid;grid-template-columns:1.2fr .8fr;align-items:center;min-height:650px}.hero-copy{padding:80px 0}.eyebrow{font-size:12px;font-weight:950;letter-spacing:.16em}.eyebrow.orange{color:var(--orange)}.hero h1{font-size:clamp(58px,8.2vw,102px);text-transform:uppercase;line-height:.83;letter-spacing:-.045em;margin:14px 0 26px}.hero h1 span{color:var(--blue2)}.hero-lead{font-size:19px;max-width:660px;color:#d6e0ee}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}.trust-row{display:flex;gap:25px;flex-wrap:wrap;margin-top:34px;font-size:13px;font-weight:750;color:#b9c7d9}.hero-graphic{position:relative;height:390px}.diamond{position:absolute;width:128px;height:128px;border:3px solid rgba(255,255,255,.65);transform:rotate(45deg);display:grid;place-items:center;font-size:46px;background:#06152b;box-shadow:0 18px 50px rgba(0,0,0,.28)}.diamond>*{transform:rotate(-45deg)}.d1{left:20px;top:40px;color:var(--blue2)}.d2{left:160px;top:150px;color:var(--orange)}.d3{left:305px;top:30px;color:var(--blue2)}.diamond{line-height:1}.diamond::first-line{transform:rotate(-45deg)}.emergency-card{position:absolute;right:0;bottom:30px;background:var(--orange);width:190px;height:190px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#fff;box-shadow:0 0 0 9px rgba(243,107,0,.14),var(--shadow)}.emergency-card small{font-size:10px;font-weight:850}.emergency-card strong{font-size:42px;line-height:1}.emergency-card span{font-size:15px;font-weight:950}.emergency-card a{font-size:14px;font-weight:950;margin-top:7px}.section{padding:88px 0}.section-kicker{display:flex;align-items:center;gap:12px;font-size:11px;letter-spacing:.16em;color:var(--blue);margin-bottom:16px}.section-kicker span{font-size:28px;font-weight:950;color:#d9dfe7}.section-kicker.light{color:#8db4ff}.section-kicker.light span{color:#324967}.section-heading{display:grid;grid-template-columns:1.25fr .75fr;align-items:end;gap:50px;margin-bottom:40px}.section-heading h2,.section h2{font-size:clamp(36px,5vw,62px);line-height:.98;letter-spacing:-.035em;margin:0}.section h2 em{font-style:normal;color:var(--blue)}.section-heading p,.section p{color:var(--muted)}.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.service-card{position:relative;padding:28px 24px 25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);min-height:300px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 9px 24px rgba(5,19,38,.05)}.service-card:before{content:"";position:absolute;top:0;left:0;right:0;height:6px;background:var(--blue)}.service-card.orange:before{background:var(--orange)}.service-icon{font-size:36px;color:var(--blue);height:54px}.service-card.orange .service-icon{color:var(--orange)}.service-card h3{font-size:23px;line-height:1.08;margin:14px 0 10px}.service-card p{font-size:14px}.service-card a{margin-top:auto;font-weight:900;color:var(--blue)}.service-card.orange a{color:var(--orange)}.section-dark{background:linear-gradient(120deg,var(--night),var(--navy2));color:#fff}.heating-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:70px;align-items:center}.section-dark p{color:#bac9da;max-width:700px;font-size:18px}.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:11px 20px;margin:28px 0 32px;color:#e7edf6;font-weight:750}.check-grid span::first-letter{color:var(--orange)}.brand-panel{min-height:410px;border:1px solid rgba(255,255,255,.12);background:radial-gradient(circle at 60% 28%,rgba(6,75,196,.34),transparent 38%),#061222;border-radius:22px;padding:42px;display:flex;flex-direction:column;justify-content:end;position:relative;overflow:hidden}.brand-panel:before{content:"";position:absolute;width:250px;height:250px;border:2px solid rgba(255,255,255,.15);transform:rotate(45deg);right:-35px;top:-55px}.brand-symbol{font-size:58px;position:absolute;right:48px;top:48px}.brand-panel strong{font-size:45px;line-height:.92;letter-spacing:-.03em}.brand-panel strong::first-line{color:var(--orange)}.brand-panel small{color:#9facc0;margin-top:18px}.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.project-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}.project-photo{height:270px;background:linear-gradient(135deg,#dfe3e8,#aeb7c2);display:grid;place-items:center;color:#697483;font-size:12px;font-weight:900;letter-spacing:.12em}.project-body{padding:24px}.project-body small{color:var(--orange);font-weight:950;letter-spacing:.12em}.project-body h3{font-size:22px;margin:7px 0}.project-body p{font-size:14px;margin-bottom:0}.why-section{background:var(--blue);color:#fff}.why-section h2 em{color:#fff}.why-section p{color:#dce8ff}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:75px;align-items:center}.benefit-grid{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid rgba(255,255,255,.25);border-left:1px solid rgba(255,255,255,.25)}.benefit-grid div{padding:28px;border-right:1px solid rgba(255,255,255,.25);border-bottom:1px solid rgba(255,255,255,.25)}.benefit-grid b{display:block;font-size:15px;letter-spacing:.08em}.benefit-grid span{display:block;color:#d8e5ff;font-size:13px;margin-top:6px}.career-grid{display:grid;grid-template-columns:1fr .85fr;gap:64px;align-items:center}.career-image{display:block;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);background:var(--night)}.career-image img{width:100%;display:block}.career-section h2 em{color:var(--orange)}.career-section p{font-size:18px}.contact-section{background:var(--soft)}.contact-panel{display:grid;grid-template-columns:.8fr 1.2fr .72fr;background:#fff;border-radius:20px;overflow:hidden;box-shadow:var(--shadow)}.contact-copy{background:var(--night);color:#fff;padding:42px}.contact-copy h2{font-size:46px;margin:12px 0 18px}.contact-copy p{color:#c2cddd}.contact-line{display:block;font-size:19px;font-weight:900;margin-top:14px}.contact-line.emergency{color:var(--orange)}.form-placeholder{padding:42px}.form-placeholder h3{font-size:25px;margin-top:0}.form-placeholder code{display:block;background:#f1f3f6;padding:15px;border-radius:8px;margin:20px 0}.business-card{padding:34px;border-left:1px solid var(--line)}.business-card img{max-width:180px;background:var(--night);margin-bottom:24px}.business-card strong{display:block;font-size:18px}.site-footer{background:#030912;color:#bcc8d9;padding:58px 0 90px;border-top:5px solid var(--orange)}.footer-grid{display:grid;grid-template-columns:1.25fr .9fr .8fr 1.1fr;gap:44px}.footer-brand-wrap img{width:220px;margin-bottom:16px}.footer-grid h3{color:#fff;font-size:14px;letter-spacing:.1em;text-transform:uppercase}.footer-grid a,.footer-grid span{display:block;margin:8px 0}.footer-grid a:hover{color:var(--orange)}.footer-emergency{color:var(--orange)!important;font-weight:900}.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.13);padding-top:18px;margin-top:38px;font-size:12px}.page-hero{background:linear-gradient(120deg,var(--night),var(--navy2));color:#fff;padding:90px 0 70px;border-bottom:5px solid var(--orange)}.page-hero h1{font-size:clamp(48px,7vw,78px);line-height:1;margin:12px 0}.content-narrow{max-width:900px}.entry-content{font-size:18px}.entry-content h2,.entry-content h3{color:var(--navy)}.page-featured img{border-radius:var(--radius)}.page-cta{margin-top:50px;padding:34px;background:var(--soft);border-left:6px solid var(--orange)}.mobile-emergency{display:none}
@media(max-width:1050px){.header-cta{display:none}.nav-toggle{display:inline-flex;background:var(--orange);color:#fff;border:0;padding:10px 15px;font-weight:850}.primary-nav{display:none;position:absolute;left:18px;right:18px;top:82px;background:var(--night);padding:20px;border:1px solid rgba(255,255,255,.1);box-shadow:var(--shadow)}.primary-nav.is-open{display:block}.nav-list{flex-direction:column;align-items:stretch}.nav-list a{display:block;padding:8px}.service-grid{grid-template-columns:1fr 1fr}.hero-grid{grid-template-columns:1fr}.hero-graphic{display:none}.heating-grid,.career-grid,.about-grid{grid-template-columns:1fr}.contact-panel{grid-template-columns:1fr 1.2fr}.business-card{grid-column:1/-1;border-left:0;border-top:1px solid var(--line)}.footer-grid{grid-template-columns:1fr 1fr}.topbar-area{display:none}}
@media(max-width:720px){body{padding-bottom:54px}.topbar-inner{justify-content:center}.topbar-inner>a:last-child{display:none}.header-inner{min-height:75px}.fallback-logo,.custom-logo{max-height:60px;max-width:175px}.hero,.hero-grid{min-height:auto}.hero-copy{padding:64px 0 135px}.hero h1{font-size:58px}.hero-lead{font-size:16px}.emergency-card{right:auto;left:18px;bottom:22px;width:auto;height:auto;border-radius:8px;padding:13px 18px;align-items:flex-start}.emergency-card strong,.emergency-card span{display:inline;font-size:18px}.emergency-card small{display:none}.emergency-card a{font-size:15px}.section{padding:64px 0}.section-heading{grid-template-columns:1fr;gap:8px}.service-grid,.project-grid,.check-grid,.benefit-grid,.contact-panel,.footer-grid{grid-template-columns:1fr}.project-photo{height:220px}.contact-copy,.form-placeholder,.business-card{padding:28px}.business-card{grid-column:auto}.footer-bottom{flex-direction:column;gap:8px}.mobile-emergency{display:block;position:fixed;z-index:90;bottom:0;left:0;right:0;background:var(--orange);color:#fff;text-align:center;padding:14px;font-weight:950}.career-grid{gap:32px}}
/* v3 – komplette Einrichtung */
.nav-list .sub-menu{display:none;position:absolute;top:100%;left:0;min-width:250px;background:var(--night);padding:12px;list-style:none;border:1px solid rgba(255,255,255,.1);box-shadow:var(--shadow)}
.nav-list>li{position:relative}.nav-list>li:hover>.sub-menu,.nav-list>li:focus-within>.sub-menu{display:block}.nav-list .sub-menu a{padding:9px 12px;display:block;white-space:nowrap}
.content-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:30px 0}.content-cards>div{padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--soft)}.content-cards h3{margin-top:0}.legal-warning{padding:24px;border-left:6px solid var(--orange);background:#fff3e8}.notdienst-big a{display:inline-block;font-size:clamp(30px,6vw,54px);font-weight:950;color:var(--orange)}.career-full img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow)}
.boenner-contact-form{margin-top:24px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.boenner-contact-form label{display:block;font-weight:800;font-size:13px;margin-bottom:14px}.boenner-contact-form input,.boenner-contact-form select,.boenner-contact-form textarea{display:block;width:100%;margin-top:6px;border:1px solid #ccd3dc;border-radius:7px;background:#fff;padding:13px 14px;font:inherit;color:var(--ink)}.boenner-contact-form textarea{resize:vertical}.privacy-check{font-weight:500!important;font-size:12px!important;line-height:1.45}.privacy-check input{display:inline-block!important;width:auto!important;margin:0 7px 0 0!important}.privacy-check a{text-decoration:underline;color:var(--blue)}.form-hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}.form-message{padding:14px 16px;border-radius:7px;margin:0 0 16px;font-weight:800}.form-message.success{background:#e8f6ec;color:#1d6332}.form-message.error{background:#fff0ee;color:#8e2f24}
.form-placeholder .boenner-contact-form{margin-top:15px}.form-placeholder .form-grid{grid-template-columns:1fr 1fr}.form-placeholder{overflow:hidden}.form-placeholder .boenner-contact-form .btn{border:0;cursor:pointer}
@media(max-width:1050px){.nav-list .sub-menu{display:block;position:static;border:0;box-shadow:none;padding:0 0 0 16px}.nav-list .sub-menu a{color:#cbd7e8;font-size:13px}}
@media(max-width:720px){.content-cards,.form-grid,.form-placeholder .form-grid{grid-template-columns:1fr}}
.marcel-home-grid{align-items:stretch}.marcel-home-grid>.div,.marcel-home-grid>div:first-child{display:flex;flex-direction:column;justify-content:center}.marcel-home-grid .benefit-grid{margin-top:28px}.marcel-home-card{background:#061222;border:1px solid rgba(255,255,255,.18);border-radius:20px;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.25)}.marcel-home-photo{height:440px;overflow:hidden;background:#07101e}.marcel-home-photo img{width:100%;height:100%;object-fit:cover;object-position:center 18%;transform:scale(1.03)}.marcel-home-copy{padding:24px 28px 28px}.marcel-home-copy h3{font-size:30px;margin:7px 0 3px}.marcel-home-copy p{margin:0 0 12px;color:#dce8ff}.marcel-home-copy a{font-weight:900;color:var(--orange)}.marcel-profile{display:grid;grid-template-columns:320px 1fr;gap:42px;align-items:center;margin:52px 0;padding:28px;background:var(--soft);border-radius:18px}.marcel-photo{height:390px;border-radius:14px;overflow:hidden;background:#07101e}.marcel-photo img{width:100%;height:100%;object-fit:cover;object-position:center 15%}.legal-note{padding:22px 24px;border-left:6px solid var(--orange);background:#fff3e8;margin:0 0 30px;border-radius:4px}.entry-content h3{margin-top:34px}.entry-content a{color:var(--blue);font-weight:700}@media(max-width:820px){.marcel-profile{grid-template-columns:1fr}.marcel-photo{height:420px}.marcel-home-photo{height:430px}}

/* v5.3.1 – Über uns / Unternehmensgeschichte */
.about-founded{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.9fr);gap:32px;align-items:stretch;margin:38px 0 48px;padding:0;background:linear-gradient(120deg,var(--night),var(--navy2));color:#fff;border-radius:18px;border-left:7px solid var(--orange);box-shadow:var(--shadow);overflow:hidden}.about-founded-copy{display:grid;grid-template-columns:180px 1fr;gap:34px;align-items:center;padding:32px 34px}.about-founded .about-year{font-size:66px;font-weight:950;line-height:1;color:var(--orange);letter-spacing:-.05em}.about-founded h3{color:#fff!important;font-size:30px;margin:6px 0 6px}.about-founded p{color:#cbd7e8;margin:0}.about-founded-photo{min-height:330px}.about-founded-photo img{display:block;width:100%;height:100%;min-height:330px;object-fit:cover;object-position:center}.about-story{margin:70px 0 30px}.about-story-head{max-width:760px;margin-bottom:30px}.about-story-head h2{margin:8px 0 12px}.about-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.about-tile{position:relative;margin:0;min-height:420px;border-radius:18px;overflow:hidden;background:var(--night);box-shadow:var(--shadow)}.about-tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .35s ease}.about-tile:hover img{transform:scale(1.025)}.about-tile:after{content:"";position:absolute;inset:30% 0 0;background:linear-gradient(transparent,rgba(3,9,18,.92))}.about-tile figcaption{position:absolute;z-index:2;left:26px;right:26px;bottom:24px;color:#fff}.about-tile figcaption strong{display:block;font-size:24px;line-height:1.1;margin-bottom:7px}.about-tile figcaption span{display:block;color:#d9e2ee;font-size:15px;line-height:1.5}.about-tile-tall{min-height:560px}.about-tile-wide{grid-column:1/-1;min-height:470px}.about-tile-wide img{object-position:center 42%}@media(max-width:720px){.about-founded{grid-template-columns:1fr;gap:0}.about-founded-copy{grid-template-columns:1fr;gap:16px;padding:26px}.about-founded-photo{min-height:260px}.about-founded-photo img{min-height:260px}.about-founded .about-year{font-size:54px}.about-gallery{grid-template-columns:1fr}.about-tile,.about-tile-tall,.about-tile-wide{grid-column:auto;min-height:430px}.about-tile figcaption{left:20px;right:20px;bottom:20px}.about-tile figcaption strong{font-size:21px}}

/* v5.3.4 – persönlicher Startseitenbereich + Hersteller/Großhandel */
.personal-section{background:#fff}.personal-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:50px;align-items:center}.personal-photo{border-radius:20px;overflow:hidden;box-shadow:var(--shadow);min-height:500px;background:var(--night)}.personal-photo img{display:block;width:100%;height:100%;min-height:500px;object-fit:cover;object-position:center 42%}.personal-copy h2{margin:12px 0 18px}.personal-copy p{font-size:18px;line-height:1.75;max-width:640px;margin-bottom:28px}.partners-section{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.partners-heading{margin-bottom:34px}.partner-groups{display:grid;grid-template-columns:1.45fr 1fr;gap:28px}.partner-group{background:#fff;border-radius:18px;padding:28px;box-shadow:0 12px 35px rgba(4,17,34,.08);border:1px solid var(--line)}.partner-group h3{margin:0 0 20px;color:var(--navy);font-size:15px;letter-spacing:.11em;text-transform:uppercase}.partner-logo-grid{display:grid;gap:16px}.partner-logo-grid.manufacturers{grid-template-columns:repeat(3,minmax(0,1fr))}.partner-logo-grid.wholesalers{grid-template-columns:repeat(2,minmax(0,1fr))}.partner-logo-card{height:128px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid #e4e8ee;border-radius:12px;padding:14px}.partner-logo-card img{display:block;width:100%;height:100%;object-fit:contain}.partners-section .section-heading p{max-width:650px}
@media(max-width:900px){.personal-grid,.partner-groups{grid-template-columns:1fr}.personal-photo{min-height:430px}.personal-photo img{min-height:430px}.partner-logo-grid.manufacturers{grid-template-columns:repeat(3,1fr)}}
@media(max-width:620px){.personal-photo,.personal-photo img{min-height:360px}.partner-logo-grid.manufacturers,.partner-logo-grid.wholesalers{grid-template-columns:1fr 1fr}.partner-logo-card{height:110px}.partner-group{padding:20px}}

/* v5.3.5: Navigation stabilisieren – Top-Level-Bezeichnungen bleiben einzeilig. */
@media(min-width:1051px){.nav-list{gap:18px}.nav-list>li>a{white-space:nowrap;font-size:13.5px}.header-inner{gap:22px}}


/* v5.3.9 – Social Media Links */
.social-follow{margin-top:20px}.social-follow>span{font-size:11px!important;text-transform:uppercase;letter-spacing:.12em;color:#8493a8;margin-bottom:9px!important;font-weight:850}.social-links{display:flex;gap:10px}.social-link{width:42px;height:42px;border-radius:50%;display:inline-flex!important;align-items:center;justify-content:center;margin:0!important;background:#0b1b31;border:1px solid rgba(255,255,255,.14);transition:.2s}.social-link:hover{background:var(--orange);transform:translateY(-2px);color:#fff!important}.social-link svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.8;color:#fff}.social-link.facebook svg{fill:currentColor;stroke:none}.social-link .social-dot{fill:currentColor;stroke:none}.home-social{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:17px;padding-top:15px;border-top:1px solid rgba(255,255,255,.15);font-size:13px;color:#cbd9ee}.home-social>a{color:#fff!important;text-decoration:underline;text-underline-offset:3px}.home-social>a:hover{color:var(--orange)!important}.home-social>span:first-child{font-weight:800;color:#cbd9ee}@media(max-width:720px){.social-link{width:46px;height:46px}.home-social{gap:7px}}