/* RSD | Rhein Strategic Defence & Industry – Über RSD (ueber-rsd.html)
   Longpage v4.2_final · Stand 13.09.2026
   Reines CSS, keine externen Ressourcen. Schrift IBM Plex Sans self-hosted (OFL 1.1, assets/fonts/). */

@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:400;font-display:swap;src:url("../fonts/IBMPlexSans-Regular.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:500;font-display:swap;src:url("../fonts/IBMPlexSans-Medium.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:600;font-display:swap;src:url("../fonts/IBMPlexSans-SemiBold.woff2") format("woff2")}

/* Design-Tokens */
:root{--navy:#10233F;--ink:#1F2933;--steel:#4F5B66;--mist:#E9EDF1;--paper:#FFFFFF;--rule:#C9D1DA;--accent:#2B5C8A;--bordeaux:#9F1D35;--maxw:1120px;--gutter:clamp(20px,4vw,48px)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;font-family:"IBM Plex Sans","Inter",system-ui,-apple-system,"Segoe UI",Roboto,"DejaVu Sans",Arial,sans-serif;font-size:17px;line-height:1.6;color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.skip{position:absolute;left:-999px;top:8px;background:var(--paper);padding:8px 12px}
.skip:focus{left:8px;z-index:20}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
p{margin:0 0 1em;max-width:70ch}
h1,h2,h3{margin:0;font-weight:600;line-height:1.2;color:var(--navy)}
h1{font-size:clamp(30px,4.4vw,50px);font-weight:500;max-width:22ch}
h2{font-size:clamp(24px,3vw,32px);max-width:26ch;margin-bottom:20px}
.label{font-size:14px;font-weight:500;color:var(--steel);margin-bottom:10px}
.lead{font-size:18px;max-width:64ch}
.ph{background:rgba(159,29,53,.12);color:#9F1D35;padding:0 4px}

/* Navigation */
.nav{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.96);border-bottom:1px solid var(--rule)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;padding-top:14px;padding-bottom:14px;gap:24px}
.logo{display:inline-flex;align-items:center;text-decoration:none}
.logo img{display:block;height:40px;width:auto}
.nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:nowrap}
.nav li{margin-left:26px;white-space:nowrap}
.nav li a{color:var(--ink);text-decoration:none;font-size:15px;padding:6px 0;border-bottom:2px solid transparent}
.nav li a[aria-current]{border-bottom-color:var(--navy);color:var(--navy);font-weight:500}

/* Sektionen */
section{padding:72px 0}
section.tight{padding-top:48px}
.mist{background:var(--mist)}
.kern{font-size:20px;font-weight:500;color:var(--navy);line-height:1.4;max-width:30ch}

/* Hero */
.hero{padding:0 0 72px}
.hero figure{position:relative;margin:0}
.hero img{display:block;width:100%;height:auto}
.hero .wrap{padding-top:48px}
.hero .cta-row{margin-top:8px}

/* Bilder und Bildunterschriften */
figure{margin:0}
figure img{display:block;width:100%;height:auto;background:var(--mist)}
figcaption{font-size:14px;color:var(--steel);margin-top:10px;line-height:1.5}
figcaption .ki{display:block;font-size:13px;margin-top:2px}

/* KI-Kennzeichnung am Bild (Art. 50 Abs. 4 KI-VO): dezentes Label in der Bildecke */
.ki-label{position:absolute;right:12px;bottom:12px;font-size:12px;line-height:1.3;font-weight:500;letter-spacing:.2px;color:#FFFFFF;background:rgba(16,35,63,.85);padding:4px 8px;pointer-events:none}

/* Buttons */
.btn{display:inline-block;background:var(--navy);color:#fff;text-decoration:none;padding:14px 22px;font-size:16px;font-weight:500}
.btn.light{background:#fff;color:var(--navy)}

/* Raster */
.g2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:start}
.g57{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px;align-items:start}
.g75{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:start}

/* Zusammenarbeit */
.felder4{display:grid;grid-template-columns:1fr;gap:24px}
.felder4 h3{font-size:18px;margin-bottom:8px}
.felder4 p{font-size:16px;margin:0}

/* Gründer */
.einordnung{background:var(--paper);padding:18px 20px;font-size:16px;max-width:70ch;margin-top:8px}
.einordnung p{margin:0}

/* Grundsätze */
.anspruch ul{list-style:none;margin:8px 0 0;padding:0;max-width:78ch}
.anspruch li{display:grid;grid-template-columns:180px 1fr;gap:24px;padding:16px 0;border-top:1px solid #D5DCE4;font-size:16px}
.anspruch li:first-child{border-top:0;padding-top:0}
.anspruch li b{font-weight:500;color:var(--navy)}

/* Verantwortung & Grenzen */
.gov ul{list-style:none;margin:0;padding:0;max-width:70ch}
.gov li{padding:14px 0;border-top:1px solid var(--rule);font-size:16px}
.gov li:first-child{border-top:0;padding-top:0}

/* Standort & Kontakt (Navy-Band mit Bildhintergrund, ca. 86 % Navy-Überlagerung) */
.cta{position:relative;color:#fff;background-color:var(--navy);background-image:linear-gradient(rgba(16,35,63,.86),rgba(16,35,63,.86)),url("../images/ueber-rsd/rsd-ueber-rsd-standort-band-konferenzraum-1536.jpg");background-size:cover;background-position:center}
@supports (background-image:image-set(url("x.avif") type("image/avif"))){
 .cta{background-image:linear-gradient(rgba(16,35,63,.86),rgba(16,35,63,.86)),image-set(url("../images/ueber-rsd/rsd-ueber-rsd-standort-band-konferenzraum-1536.avif") type("image/avif"),url("../images/ueber-rsd/rsd-ueber-rsd-standort-band-konferenzraum-1536.webp") type("image/webp"),url("../images/ueber-rsd/rsd-ueber-rsd-standort-band-konferenzraum-1536.jpg") type("image/jpeg"))}
}
@media (max-width:768px){
 .cta{background-image:linear-gradient(rgba(16,35,63,.86),rgba(16,35,63,.86)),url("../images/ueber-rsd/rsd-ueber-rsd-standort-band-konferenzraum-768.jpg")}
 @supports (background-image:image-set(url("x.avif") type("image/avif"))){
  .cta{background-image:linear-gradient(rgba(16,35,63,.86),rgba(16,35,63,.86)),image-set(url("../images/ueber-rsd/rsd-ueber-rsd-standort-band-konferenzraum-768.avif") type("image/avif"),url("../images/ueber-rsd/rsd-ueber-rsd-standort-band-konferenzraum-768.webp") type("image/webp"),url("../images/ueber-rsd/rsd-ueber-rsd-standort-band-konferenzraum-768.jpg") type("image/jpeg"))}
 }
}
.cta h2{color:#fff}
.cta .label{color:#B9C4D2}
.cta p{color:#D6DEE8;font-size:18px;max-width:62ch}
.cta .wrap{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:end}
.cta .ki-label{color:#E9EDF1;background:rgba(16,35,63,.6);border:1px solid rgba(233,237,241,.35)}
.ansprech{display:grid;grid-template-columns:144px 1fr;gap:22px;align-items:center;margin-bottom:28px}
.ansprech img{width:144px;height:144px;object-fit:cover;display:block;background:transparent}
.ansprech .t{font-size:15px;color:#D6DEE8;line-height:1.5}
.ansprech .t b{color:#fff;font-weight:500;display:block}
.standort{font-size:15px;line-height:1.6;color:#D6DEE8;max-width:40ch;margin-bottom:28px}
.kontakt{font-size:15px;line-height:1.6;color:#D6DEE8}
.kontakt b{color:#fff;font-weight:500}
.kontakt a{color:#fff}

/* Footer */
footer{padding:36px 0 44px;border-top:1px solid var(--rule);font-size:13px;color:var(--steel);line-height:1.55}
footer .wrap{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:32px}
footer ul{list-style:none;margin:0 0 12px;padding:0;display:flex;flex-wrap:wrap;gap:18px}
footer a{color:var(--steel)}

/* Breakpoints */
@media (max-width:900px){
 .g2,.g57,.g75,.cta .wrap,footer .wrap{grid-template-columns:1fr}
 .nav li{margin-left:16px}
 .nav li a{font-size:14px}
 .anspruch li{grid-template-columns:1fr;gap:4px}
 .hero img{aspect-ratio:16/9;object-fit:cover}
}
@media (max-width:600px){
 .nav .wrap{flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
 .logo img{height:34px}
 .hero img{aspect-ratio:4/5}
 section{padding:56px 0}
 .hero{padding-bottom:56px}
}