/* nabla B — Corporate Design: #323942, CMU Bright Roman / SemiBold */
@font-face{font-family:"CMU Bright";src:url(/assets/fonts/cmunbmr.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"CMU Bright";src:url(/assets/fonts/cmunbmo.woff2) format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"CMU Bright";src:url(/assets/fonts/cmunbsr.woff2) format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"CMU Bright";src:url(/assets/fonts/cmunbso.woff2) format("woff2");font-weight:600;font-style:italic;font-display:swap}
:root{
  --ink:#323942;      /* nabla B Grau 100% */
  --ink-80:#5b616a;   /* 80% */
  --ink-60:#848891;   /* 60% */
  --ink-40:#adb0b3;   /* 40% */
  --ink-20:#d6d7d9;   /* 20% */
  --ink-10:#eaebec;
  --paper:#ffffff;
  --paper-2:#f5f5f6;
  --font:"CMU Bright","Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);font-size:18px;line-height:1.55;font-weight:400}
a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--ink-40);text-underline-offset:3px}
a:hover{text-decoration-color:var(--ink)}
h1,h2,h3,h4{font-weight:600;line-height:1.15;margin:0 0 .5em}
h1{font-size:clamp(2rem,5vw,3.4rem)}
h2{font-size:clamp(1.6rem,3.4vw,2.3rem)}
h3{font-size:1.25rem}
p{margin:0 0 1em}
img{max-width:100%;height:auto}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:99}

/* header */
.site-header{position:sticky;top:0;background:var(--paper);z-index:20;border-bottom:1px solid var(--ink-20)}
.site-header .wrap{display:flex;align-items:center;gap:24px;min-height:84px}
.brand{display:flex;align-items:center;text-decoration:none;margin-right:auto}
.brand img{height:60px;width:auto;display:block}
.nav{display:flex;gap:6px;flex-wrap:wrap}
.nav a{text-decoration:none;padding:8px 12px;border-radius:2px;font-weight:400;color:var(--ink-80)}
.nav a:hover,.nav a[aria-current=page]{color:var(--ink);background:var(--ink-10)}
.lang{display:flex;gap:4px;margin-left:8px;padding-left:12px;border-left:1px solid var(--ink-20)}
.lang a{text-decoration:none;padding:4px 7px;border-radius:2px;font-size:.95rem;line-height:1;color:var(--ink-80)}
.lang a[aria-current=true]{background:var(--ink);color:#fff}
.lang a span.f{font-size:1.15rem;margin-right:4px;vertical-align:-1px}
.menu-btn{display:none;background:none;border:1px solid var(--ink-40);border-radius:2px;padding:8px 10px;font:inherit;color:var(--ink);cursor:pointer}
@media(max-width:820px){
  .site-header .wrap{flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
  .brand img{height:48px}
  .menu-btn{display:inline-block;order:2}
  .lang{order:3;border:0;padding:0;margin:0}
  .nav{order:4;display:none;width:100%;flex-direction:column;padding-top:8px;border-top:1px solid var(--ink-20)}
  .nav.open{display:flex}
}

/* diagonal band (CD: schräg angeschnittene dunkle Fläche) */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;right:-12vw;top:0;bottom:0;width:38vw;background:var(--paper);clip-path:polygon(38% 0,100% 0,100% 100%,0 100%)}
.hero .wrap{position:relative;z-index:1;padding-top:72px;padding-bottom:72px;max-width:calc(var(--maxw));}
.hero-inner{max-width:720px}
.hero h1{color:#fff;margin-bottom:.4em}
.hero .lead{font-size:1.3rem;color:var(--ink-20);max-width:640px}
.hero .pillars{list-style:none;padding:0;margin:28px 0 36px;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px 24px;max-width:700px}
.hero .pillars li{padding-left:24px;position:relative;color:#fff}
.hero .pillars li::before{content:"";position:absolute;left:0;top:.5em;border-style:solid;border-width:6px 0 6px 11px;border-color:transparent transparent transparent #fff}
.btn{display:inline-block;background:#fff;color:var(--ink);padding:14px 26px;border-radius:2px;font-weight:600;text-decoration:none;border:1px solid #fff}
.btn:hover{background:var(--ink-10)}
.btn.ghost{background:transparent;color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.12)}
.btn.dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn.dark:hover{background:var(--ink-80)}
.hero .cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero .cta-note{width:100%;color:var(--ink-20);font-size:.95rem;margin-top:8px}
@media(max-width:820px){.hero::after{display:none}.hero .wrap{padding-top:48px;padding-bottom:48px}}

/* section heading like CD ("▶ Titel" with angled dark tab) */
section{padding:64px 0}
section.alt{background:var(--paper-2)}
.sec-title{display:flex;align-items:center;gap:14px;margin-bottom:28px}
.sec-title::before{content:"";display:inline-block;width:0;height:0;border-style:solid;border-width:11px 0 11px 20px;border-color:transparent transparent transparent var(--ink)}
.sec-title h1,.sec-title h2{margin:0}
.sec-intro{max-width:760px;font-size:1.15rem;color:var(--ink-80)}
.grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
@media(min-width:900px){.grid-3{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--paper);border:1px solid var(--ink-20);border-top:4px solid var(--ink);padding:22px 22px 18px;border-radius:2px}
.card h3{margin-top:0}
.card p{color:var(--ink-80);margin-bottom:.4em}
.card ul{margin:.4em 0 0;padding-left:1.1em;color:var(--ink-80)}
.card .tag{display:inline-block;font-size:.8rem;color:var(--ink-60);border:1px solid var(--ink-20);padding:1px 8px;border-radius:2px;margin-top:8px}
.tri{list-style:none;padding:0;margin:0}
.tri li{position:relative;padding-left:24px;margin:.35em 0}
.tri li::before{content:"";position:absolute;left:0;top:.55em;border-style:solid;border-width:5px 0 5px 9px;border-color:transparent transparent transparent var(--ink)}

/* team */
.team{display:grid;gap:34px 40px;grid-template-columns:1fr}
@media(min-width:720px){.team{grid-template-columns:1fr 1fr}}
.person{display:flex;gap:22px;align-items:flex-start}
.person .ptext{min-width:0}
@media(max-width:520px){.person{flex-direction:column}}
.person{text-align:left}
.person .pic{width:120px;height:120px;flex:0 0 120px;border-radius:50%;object-fit:cover;display:block;background:var(--ink-10)}
.person .initials{width:120px;height:120px;flex:0 0 120px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--ink);color:#fff;font-size:2.6rem;font-weight:600;margin-bottom:14px}
.person h3{margin-bottom:.15em}
.person .role{color:var(--ink-80);margin-bottom:.5em}
.person .edu{list-style:none;padding:0;margin:0 0 .8em;font-size:.9rem;color:var(--ink-60)}
.person .edu li{position:relative;padding-left:16px;margin:.2em 0}
.person .edu li::before{content:"";position:absolute;left:0;top:.5em;border-style:solid;border-width:4px 0 4px 7px;border-color:transparent transparent transparent var(--ink-40)}
.person .links a{margin-right:10px;font-size:.95rem}

/* contact */
.contact-box{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.contact-box .card{border-top-color:var(--ink)}
@media(min-width:720px){.contact-box.two{grid-template-columns:1fr 1fr}}
.contact-box .card p:last-child{margin-bottom:0}
.big{font-size:1.5rem;font-weight:600;word-break:break-word}
dl.kv{display:grid;grid-template-columns:max-content 1fr;gap:6px 18px;margin:0}
dl.kv dt{color:var(--ink-60)}
dl.kv dd{margin:0}

/* references */
.refs{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.ref{border:1px solid var(--ink-20);padding:18px 20px;border-radius:2px;background:#fff}
.ref h3{font-size:1.1rem;margin-bottom:.2em}
.ref .meta{color:var(--ink-60);font-size:.9rem;margin-bottom:.4em}
.ref p{color:var(--ink-80);margin-bottom:.4em;font-size:1rem}
.ref .links a{font-size:.95rem;margin-right:10px}

/* prose pages */
.prose{max-width:780px}
.prose h2{font-size:1.5rem;margin-top:1.6em}
.prose h3{margin-top:1.2em}
.note{border-left:4px solid var(--ink);background:var(--paper-2);padding:14px 18px;margin:1.4em 0}

/* footer */
.site-footer{background:var(--paper-2);border-top:1px solid var(--ink-20);padding:44px 0 32px;color:var(--ink-80);font-size:.95rem}
.site-footer .cols{display:grid;gap:28px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.site-footer img.flogo{height:64px;width:auto;display:block;margin-bottom:10px;background:#fff;padding:6px 8px 6px 0}
.site-footer a{color:var(--ink)}
.site-footer .legal{margin-top:28px;padding-top:16px;border-top:1px solid var(--ink-20);display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between}
.site-footer h4{margin:0 0 .5em;color:var(--ink)}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:.25em 0}