/* Vektor Plan – Stylesheet
   Farben: Navy #0E2235, Text #1E2731, Grau #3A4652, Linie #DCE2E8, Hell #F2F5F8, Akzent #1A5FA0
   Schriften: IBM Plex Sans (Text), IBM Plex Mono (nur Normbezeichnungen), lokal gehostet */

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

:root{
  --navy:#0E2235;--navy-2:#16304A;--ink:#1E2731;--steel:#3A4652;--muted:#4C5A67;
  --line:#DCE2E8;--mist:#F2F5F8;--accent:#1A5FA0;--accent-dark:#0F3F6E;--on-navy:#D3DEE8;
  --sans:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;font-family:var(--sans);font-size:17px;line-height:1.6;color:var(--ink);background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
a:hover{color:var(--accent-dark)}
:focus-visible{outline:3px solid #F2B705;outline-offset:3px}
h1,h2,h3{margin:0;color:var(--navy);font-weight:600;line-height:1.15}
p{margin:0}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;background:#fff;padding:8px 12px;z-index:10}

/* Kopfzeile */
.site-header{border-bottom:1px solid var(--line);background:#fff}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 32px;padding-top:16px;padding-bottom:16px}
.brand img{height:48px;width:auto}
@media (max-width:720px){.brand img{height:38px}}
.nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px 28px}
.nav a{color:var(--ink);text-decoration:none;font-weight:500}
.nav a:hover{color:var(--accent)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:4px;font-weight:600;font-size:16px;text-decoration:none;border:2px solid transparent}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);color:#fff}
.btn-light{background:#fff;color:var(--navy)}
.btn-light:hover{background:var(--mist);color:var(--navy)}
.btn-ghost-light{border-color:#fff;color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.1);color:#fff}
.btn-ghost{border-color:var(--navy);color:var(--navy)}
.btn-ghost:hover{background:var(--mist);color:var(--navy)}
.nav .btn{min-height:44px;padding:0 18px;font-size:15px}
.nav .btn-primary{color:#fff}

/* Planraster im Hintergrund */
.blueprint{background-color:var(--navy);background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:32px 32px;color:#fff}
.blueprint h1,.blueprint h2,.blueprint h3{color:#fff}

/* Kopfbereich */
.hero .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:56px;padding-top:96px;padding-bottom:96px}
.hero-text{flex:1 1 540px;min-width:0;display:flex;flex-direction:column;gap:24px}
.hero-kicker{color:#9FC4E8;font-weight:500}
.hero h1{font-size:clamp(34px,4.6vw,52px);letter-spacing:-.01em;max-width:18ch}
.hero-lead{font-size:20px;color:var(--on-navy);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;padding-top:8px}

/* Datenblatt: der Ablauf eines Projekts */
.sheet{flex:1 1 380px;min-width:0;background:#fff;color:var(--ink);border-radius:6px;padding:28px}
.sheet h2{font-size:17px;font-weight:600;color:var(--muted);margin-bottom:14px}
.sheet ol{list-style:none;margin:0;padding:0;counter-reset:step}
.sheet li{counter-increment:step;display:grid;grid-template-columns:2em 1fr auto;gap:12px;align-items:baseline;padding:14px 0;border-top:1px solid var(--line)}
.sheet li::before{content:counter(step);font-family:var(--mono);font-size:14px;color:var(--accent)}
.sheet .step{font-weight:600}
.sheet .ref{font-family:var(--mono);font-size:13px;color:var(--muted);text-align:right}

/* Abschnitte */
.section{padding:88px 0}
.section-head{display:flex;flex-direction:column;gap:12px;max-width:44em;margin-bottom:40px}
.section-head h2{font-size:clamp(28px,3.4vw,40px)}
.section-head p{font-size:18px;color:var(--steel)}
.blueprint .section-head p{color:var(--on-navy)}
.mist{background:var(--mist)}

/* Leistungen */
.services{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.service{display:flex;flex-direction:column;gap:10px;padding:28px;border:1px solid var(--line);border-radius:6px;text-decoration:none;color:var(--ink);background:#fff}
.service:hover{border-color:var(--accent)}
.service h3{font-size:22px}
.service p{color:var(--steel)}
.service .more{margin-top:auto;padding-top:6px;font-weight:600;color:var(--accent)}

/* Anwendungsbereiche */
.fields .wrap{display:flex;flex-wrap:wrap;align-items:flex-start;gap:32px 56px;padding-top:72px;padding-bottom:72px}
.fields-text{flex:1 1 320px;min-width:0;display:flex;flex-direction:column;gap:12px}
.fields-text h2{font-size:32px}
.fields-text p{color:var(--steel)}
.tags{flex:2 1 560px;min-width:0;list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.tags li{padding:10px 16px;border-radius:4px;background:#fff;border:1px solid #D3DBE3;font-size:15px;font-weight:500}

/* Publikationen */
.pubs{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.pub{background:var(--navy-2);border-radius:6px;padding:28px;display:flex;flex-direction:column;gap:12px}
.pub .source{color:#9FC4E8;font-size:15px;font-weight:500}
.pub h3{font-size:22px;line-height:1.3}
.pub p{color:var(--on-navy);font-size:16px}
.pub .authors{color:#B7C7D6;font-size:15px}
.pub a{margin-top:auto;color:#fff;font-weight:600}
.pub a:hover{color:#9FC4E8}

/* Verbund und Kontakt */
.split .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px 40px}
.split-text{flex:1 1 520px;min-width:0;display:flex;flex-direction:column;gap:12px}
.split-text h2{font-size:clamp(26px,3vw,40px)}
.split-text p{color:var(--steel);font-size:18px}
.split-actions{flex:0 1 400px;min-width:0;display:flex;flex-direction:column;gap:12px}
.verbund .wrap{padding-top:72px;padding-bottom:72px}

/* Footer */
.site-footer{background:#0A1828;color:#B7C7D6;font-size:15px}
.site-footer .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;padding-top:40px;padding-bottom:40px}
.site-footer nav{display:flex;flex-wrap:wrap;gap:20px}
.site-footer a{color:#fff;text-decoration:none}
.site-footer a:hover{text-decoration:underline}

@media (max-width:720px){
  .hero .wrap{padding-top:64px;padding-bottom:64px;gap:40px}
  .section{padding:64px 0}
  .fields .wrap,.verbund .wrap{padding-top:56px;padding-bottom:56px}
  .sheet li{grid-template-columns:2em 1fr}
  .sheet .ref{grid-column:2;text-align:left}
}

/* ===== Unterseiten (ab Oktober 2026) ===== */
.nav a[aria-current="page"]{color:var(--accent)}

/* Seitenkopf der Unterseiten */
.page-head .wrap{display:flex;flex-direction:column;gap:16px;padding-top:64px;padding-bottom:56px}
.breadcrumb{font-size:15px;color:#9FC4E8}
.breadcrumb a{color:#9FC4E8;text-decoration:none}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.page-head h1{font-size:clamp(30px,4vw,44px);letter-spacing:-.01em;max-width:24ch}
.page-head .lead{font-size:19px;color:var(--on-navy);max-width:40em}

/* Leistungsblöcke (wie Karten, aber ohne Link auf die ganze Fläche) */
.blocks{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.block{display:flex;flex-direction:column;gap:12px;padding:28px;border:1px solid var(--line);border-radius:6px;background:#fff}
.block h2,.block h3{font-size:22px}
.block p{color:var(--steel)}
.block ul{margin:0;padding-left:1.15em;color:var(--steel)}
.block li+li{margin-top:6px}
.block .more{margin-top:auto;padding-top:6px;font-weight:600;text-decoration:none}
.block .more:hover{text-decoration:underline}

/* Fließtext auf Unterseiten */
.prose{max-width:46em;display:flex;flex-direction:column;gap:16px}
.prose p{color:var(--steel);font-size:18px}
.page-head + .section.blueprint{padding-top:16px;border-top:1px solid rgba(255,255,255,.12)}
.block .btn{align-self:flex-start;margin-top:auto}
.nav .btn[aria-current="page"]{color:#fff}

/* Rechtstexte (Impressum, Datenschutz) */
.legal{max-width:46em;display:flex;flex-direction:column;gap:14px}
.legal h2{font-size:26px;margin-top:28px}
.legal h2:first-child{margin-top:0}
.legal h3{font-size:19px;margin-top:12px}
.legal p,.legal li{color:var(--steel);font-size:17px}
.legal ul{margin:0;padding-left:1.15em}
.legal a{word-break:break-word}
.block .tag{font-size:14px;font-weight:600;color:var(--accent);text-transform:none}
.section-link{margin-top:28px}
.blocks-4{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

/* Bilder / Galerie */
.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.figure-wide{grid-column:1/-1}
@media (max-width:720px){.gallery{grid-template-columns:1fr}}
.figure{margin:0;display:flex;flex-direction:column;gap:10px}
.figure img{width:100%;height:auto;border:1px solid var(--line);border-radius:6px;background:#fff}
.figure a:hover img{border-color:var(--accent)}
.figure figcaption{font-size:16px;color:var(--steel)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:auto}
.block .btn-row .btn{margin-top:0}

.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* Bildvergrößerung */
.figure a{cursor:zoom-in;display:block}
.lightbox{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(10,24,40,.92)}
.lightbox.open{display:flex}
.lightbox figure{margin:0;max-width:100%;max-height:100%;display:flex;flex-direction:column;gap:12px;align-items:center}
.lightbox img{max-width:100%;max-height:calc(100vh - 110px);width:auto;height:auto;background:#fff;border-radius:4px;cursor:zoom-out}
.lightbox figcaption{color:#D3DEE8;font-size:16px;text-align:center}
.lightbox-close{position:absolute;top:12px;right:16px;width:44px;height:44px;border:0;background:transparent;color:#fff;font-size:36px;line-height:1;cursor:pointer}
.gallery-head{font-size:clamp(24px,2.6vw,32px);margin:56px 0 24px}