/* FELIX REHER — Styleguide-Implementierung (Stand 2026-09-17).
   Ersetzt site.css, reference-fidelity.css, editorial.css und internal-pages.css vollständig. */

@font-face{font-family:'IBM Plex Sans';src:url('/assets/fonts/ibm-plex-sans.woff2') format('woff2');font-weight:400 700;font-style:normal;font-display:swap}

:root{
  --bg:#FFFFFF;
  --ink:#000000;
  --primary:#4D5560;
  --blue:var(--primary);
  --text:#1F2328;
  --red:#FF0000;
  --soft:#F3F4F6;
  --line:#9AA0A8;
  --max:936px;
  --page:'IBM Plex Sans','Segoe UI',Helvetica,Arial,sans-serif;
  --mark:var(--page);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--text);font-family:var(--page);font-weight:400;-webkit-font-smoothing:antialiased}
main#main{flex:1 0 auto}
a{color:var(--blue);text-decoration:none}
a:hover,a:focus{text-decoration:none}
img{max-width:100%;display:block}
.wrap{width:min(calc(100% - 88px),var(--max));margin-inline:auto}
.skip{position:absolute;left:-9999px;top:0;background:var(--blue);color:#fff;padding:.6rem 1rem;z-index:100}
.skip:focus{left:16px;top:16px}

/* ---------- Header / Navigation ---------- */
.site-header{background:var(--bg);border-bottom:1px solid var(--line)}
.header-inner{height:88px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{flex:0 0 auto}
.brand strong{font-family:var(--mark);font-weight:700;font-size:19px;line-height:1;letter-spacing:.01em;color:var(--ink);text-transform:uppercase}
.site-header nav{display:flex;align-items:center;flex-wrap:wrap}
.site-header nav a{display:flex;align-items:center;gap:8px;height:25px;padding:0 10px;border-left:1px solid var(--line);border-bottom:2px solid transparent;color:var(--blue);font:500 11.5px/1 var(--page);text-transform:uppercase;letter-spacing:.02em;white-space:nowrap}
.site-header nav a:hover{color:var(--red)}
.site-header nav a:first-child{border-left:0;padding-left:0}
.site-header nav a span{font-weight:700;color:var(--blue)}
.site-header nav a[aria-current="page"]{color:var(--red);border-bottom-color:var(--red)}
.site-header nav a[aria-current="page"] span{color:var(--red)}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);margin-top:0;background:var(--soft)}
.footer-main{padding:20px 0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.footer-links{display:flex;flex-wrap:wrap;align-items:center;gap:20px}
.footer-links span,.footer-links a{font:500 11.5px/1 var(--page);color:var(--blue);text-transform:uppercase;letter-spacing:.02em}
.footer-links a:hover{color:var(--red)}
.footer-divider{width:1px;height:12px;background:var(--line);display:inline-block}
.footer-badge{max-height:75px;width:auto;height:auto}

/* ---------- Hero (home, portrait pages) ---------- */
.page-hero{padding:52px 0 44px;background:var(--soft)}
.page-hero+.section{border-top-color:var(--line)}
.hero-eyebrow{font:500 12px/1 var(--page);text-transform:uppercase;letter-spacing:.04em;color:var(--blue);margin:0 0 16px}
.hero-grid{display:grid;grid-template-columns:1fr;align-items:center;gap:32px;min-height:243px}
.hero-grid.with-portrait{grid-template-columns:minmax(0,1fr) 260px;align-items:stretch}
h1.page-title{margin:0;font:700 clamp(38px,6.5vw,72px)/1.02 var(--page);letter-spacing:-.025em;color:var(--ink)}
h1.page-title.long{font-size:clamp(36px,6vw,72px)}
.hero-subtitle{margin:14px 0 0;font:600 clamp(19px,2.6vw,28px)/1.2 var(--page);color:var(--blue)}
.hero-lede{margin:16px 0 0;max-width:70ch;font:400 17px/1.5 var(--page);color:var(--blue)}
.hero-copy p+p.hero-lede{margin-top:10px}
.hero-lede.small{font-size:15px;margin-top:8px}
.hero-lede+.hero-lede.small{margin-top:18px}
.hero-portrait{position:relative;align-self:stretch;margin:-52px 0 -44px;overflow:hidden}
.hero-portrait img{position:absolute;top:0;left:50%;transform:translateX(-50%);width:340px;max-width:none;height:auto}
.hero-actions{margin-top:28px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--blue);color:#fff;padding:12px 20px;font:600 14px/1 var(--page);border:1px solid var(--blue)}
.btn:hover{background:#343a43;color:#fff}
.btn-outline{background:transparent;color:var(--blue);border:1px solid var(--blue)}
.btn-outline:hover{background:var(--soft);color:var(--blue)}
.text-link{display:inline-flex;align-items:center;gap:8px;font:600 14px/1 var(--page);color:var(--blue)}
.text-link:hover{color:var(--red)}

/* ---------- Section rhythm ---------- */
.section{padding:40px 0;border-top:1px solid var(--line)}
.section:first-of-type{border-top:1px solid var(--line)}
.section-label{display:flex;align-items:center;gap:14px;margin:0 0 24px;color:var(--red);font:700 14px/1 var(--page)}
.section-label b{color:var(--red);font:700 14px/1 var(--page)}
.section-label i{display:block;width:40px;height:1px;background:var(--red)}
.section-label span{color:var(--blue);font:500 13px/1 var(--page);text-transform:uppercase;letter-spacing:.03em}
.more{margin:28px 0 0}
.body-text{margin:0;font:400 15px/1.6 var(--page);color:var(--text)}
.profile-text{column-count:2;column-gap:48px}
.profile-text p{margin:0 0 14px;break-inside:avoid}
.profile-text a{color:var(--blue);font-weight:600}
@media(max-width:760px){.profile-text{column-count:1}}
.section-title{margin:0 0 8px;font:600 22px/1.25 var(--page);color:var(--blue);overflow-wrap:anywhere;hyphens:auto}
.section-intro{margin:0 0 24px;max-width:80ch;font:400 15px/1.55 var(--page);color:var(--blue)}

/* ---------- Text grids (2/3 columns, divider only between text) ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;column-gap:48px;row-gap:32px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;column-gap:40px;row-gap:32px}
.grid-2>*,.grid-3>*{padding-left:24px;border-left:1px solid var(--line)}
.grid-2>*:nth-child(2n+1),.grid-3>*:nth-child(3n+1){padding-left:0;border-left:0}
.grid-2 h3,.grid-3 h3,.plain-grid h3{margin:0 0 8px;font:600 17px/1.3 var(--page);color:var(--blue)}
.grid-2 p,.grid-3 p,.plain-grid p{margin:0;font:400 15px/1.6 var(--page);color:var(--text)}
.grid-2 p,.grid-3 p,.plain-grid p,.profile-text p,.body-text{hyphens:auto;-webkit-hyphens:auto;text-wrap:pretty;overflow-wrap:anywhere}
.grid-2 h3,.grid-3 h3,.plain-grid h3{text-wrap:balance}
.field-sub{margin:-4px 0 10px;font:400 15px/1.4 var(--page);color:var(--blue)}
.field-tags{margin:12px 0 0;font:400 14px/1.45 var(--page);color:var(--blue)}
.grid-2.ruled{row-gap:0}
.grid-2.ruled>*{padding-bottom:28px}
.grid-2.ruled>*:nth-child(n+3){border-top:1px solid var(--line);padding-top:28px}
.grid-2.plain-cols>*{border-left:0;padding-left:0}
@media(max-width:760px){.grid-2,.grid-3{grid-template-columns:1fr}.grid-2>*,.grid-3>*{padding-left:0;border-left:0;padding-top:16px;border-top:1px solid var(--line)}.grid-2>*:first-child,.grid-3>*:first-child{padding-top:0;border-top:0}}

/* ---------- Logo rows (no vertical dividers) ---------- */
.logo-row{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;gap:20px;width:100%}
.logo-row>*{flex:0 1 auto;min-width:0}
.logo-row>*:first-child{margin-left:0}
.logo-row>*:last-child{margin-right:0}
.logo-row .logo-item{justify-content:flex-start}
.logo-item{display:flex;align-items:center;justify-content:flex-start;gap:10px;height:50px;flex:0 1 auto;min-width:0}
.logo-item img{height:100%;width:auto;max-width:130px;max-height:100%;object-fit:contain;object-position:left center}
.logo-card{display:flex;flex-direction:column;align-items:flex-start}
.logo-card .logo-item{height:44px}
.card-caption{margin-top:10px;text-transform:none;letter-spacing:0;color:var(--text);font-weight:400}
.logo-caption{font:400 14px/1.35 var(--page);color:var(--blue);margin:10px 0 0}
.logo-fallback{font:600 14px/1 var(--page);color:var(--text);border:1px solid var(--line);padding:8px 12px}

/* ---------- Numbered lists ---------- */
.num-list{margin:0;padding:0;list-style:none;display:flex;flex-direction:column}
.num-list li{display:flex;gap:14px;align-items:baseline;padding:9px 12px;margin:0 -12px;font:400 15px/1.5 var(--page);color:var(--blue)}
.num-list li+li{border-top:1px solid var(--line)}
.num-list li:nth-child(even){background:var(--soft)}
.num-list b{color:var(--blue);font-weight:700;flex:0 0 22px}
.num-list li>span:first-of-type{flex:1 1 auto}
.num-list .row-logo{flex:0 0 auto;margin-left:auto;display:flex;align-items:center;align-self:center}
.num-list .row-logo .logo-item{height:32px}
.num-list .row-logo .logo-item img{max-width:110px}

/* ---------- Records (Lehre / Abschlussarbeiten / Publikationen) ---------- */
.rows{display:flex;flex-direction:column}
.rows>*+*{border-top:1px solid var(--line)}
.rows>*:nth-child(even){background:var(--soft)}
.rows>.year-row,.rows>details>.archive-row,.rows>details>.archive-detail,.rows>.year-toggle>summary,.rows>.year-toggle>.archive-detail{padding-inline:12px}
.rows>*{margin-inline:-12px}
.year-row{display:grid;grid-template-columns:130px 1fr;gap:24px;padding:14px 0;align-items:baseline}
.year-row .year{font:700 24px/1 var(--page);color:var(--blue);text-align:left;padding-right:16px;border-right:1px solid var(--line);align-self:stretch;white-space:nowrap}
.year-row .year sup{font:400 13px/0 var(--page);margin-left:2px}
.year-row.compact{grid-template-columns:170px 1fr}
.year-row .year small{display:inline;margin-left:8px;font:400 14px/1 var(--page);color:var(--blue)}
.year-row.with-logo{grid-template-columns:190px 1fr auto;align-items:center}
.year-row.with-logo.no-year{grid-template-columns:1fr auto}
.year-row.with-logo .year{white-space:nowrap}
.year-row.with-logo .logo-item{height:40px}
.year-row.with-logo .logo-item img{max-width:140px}
.year-row .entry-title{margin:0;font:600 15px/1.4 var(--page);color:var(--blue)}
.theses-list .entry-title{color:var(--text)}
.pub-list .entry-title{font-weight:400;color:var(--text)}
.year-row .entry-meta{margin:3px 0 0;font:400 13px/1.45 var(--page);color:var(--blue)}
.archive-row{display:grid;grid-template-columns:150px 1fr auto;gap:24px;padding:12px 0;align-items:center}
.archive-row .label{font:400 14px/1 var(--page);color:var(--blue)}
.archive-row .year{font:700 20px/1 var(--page);color:var(--blue)}
.archive-row .year small{font:400 14px/1 var(--page);margin-left:8px}
.year-toggle summary{display:flex;justify-content:space-between;align-items:center;padding:11px 0}
.year-toggle .year{font:700 17px/1 var(--page);color:var(--blue)}
.year-toggle .count{font:400 13px/1 var(--page);color:var(--blue)}
.archive-row .count{font:400 13px/1 var(--page);color:var(--blue)}
.archive-row .toggle{font:600 13px/1 var(--page);color:var(--blue)}
.archive-detail{padding:0 0 14px;border-top:0}
.archive-detail .entry{padding:10px 0;border-top:1px solid var(--soft)}
.archive-detail .entry:first-child{border-top:0}
.footnote{margin-top:16px;font:400 12px/1.5 var(--page);color:var(--blue)}
details>summary{list-style:none;cursor:pointer}
details>summary::-webkit-details-marker{display:none}
.toggle-mark{display:inline-block;width:1em;margin-left:8px;color:var(--blue);font:700 16px/1 var(--page);text-align:right}
.toggle-mark::before{content:"+"}
details[open] .toggle-mark::before{content:"–"}

/* ---------- Prose (legal, dissertation, markdown pages) ---------- */
.prose{max-width:760px;overflow-wrap:anywhere}
.prose h2{margin:2rem 0 .6rem;font:600 22px/1.25 var(--page);color:var(--blue)}
.prose h2:first-child{margin-top:0}
.prose h3{margin:1.5rem 0 .5rem;font:600 17px/1.35 var(--page);color:var(--ink)}
.prose p{margin:0 0 1rem;font:400 15px/1.6 var(--page);color:var(--text)}
.prose ul{margin:0 0 1rem;padding-left:1.2rem}
.prose li{font:400 15px/1.6 var(--page);color:var(--text);margin:.3rem 0}
.prose blockquote{margin:1.5rem 0;padding:0 0 0 20px;border-left:2px solid var(--red);font:italic 400 16px/1.5 var(--page);color:var(--blue)}
.prose a{color:var(--blue)}
.legal-page.prose{max-width:none}
.legal-page>h1:first-child{display:none}
.legal-page h2{text-transform:uppercase}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:56px}
.contact-line{display:flex;align-items:center;gap:12px;margin-bottom:12px;font:400 15px/1.45 var(--page)}
.contact-line .icon{width:22px;height:22px;color:var(--blue);flex:0 0 22px}
.contact-line .icon svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.6}
.contact-label{font:600 11px/1 var(--page);text-transform:uppercase;letter-spacing:.03em;color:var(--blue);margin-bottom:4px}
.contact-form{display:grid;gap:16px}
.contact-form label{display:flex;flex-direction:column;gap:6px;font:600 13px/1 var(--page);color:var(--blue)}
.contact-grid>*:nth-child(2){padding-left:40px;border-left:1px solid var(--line)}
.contact-form input,.contact-form textarea{width:100%;min-width:0;border:1px solid var(--line);padding:.6rem .7rem;font:400 15px var(--page);color:var(--text);background:#fff}
.contact-form input:focus,.contact-form textarea:focus{outline:2px solid var(--blue);outline-offset:1px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.hp-field{position:absolute;left:-9999px}
.form-privacy{font:400 12px/1.5 var(--page);color:var(--blue);margin:0}
.form-status{padding:.8rem 1rem;font:400 14px/1.4 var(--page);margin-bottom:1rem}
.form-status.success{background:var(--soft);color:var(--text)}
.form-status.error{background:#ffecec;color:var(--red)}
.map-box{background:var(--soft);min-height:360px;display:flex;align-items:stretch;justify-content:center}
.map-consent{display:flex;align-items:center;justify-content:center;width:100%;min-height:360px}
.map-frame{display:block;width:100%;height:100%;min-height:360px;border:0}
.map-box.map-full,.map-full .map-consent,.map-full .map-frame{min-height:420px;width:100%}
.map-placeholder{text-align:center;padding:2rem;display:flex;flex-direction:column;align-items:center;gap:10px}
.map-placeholder .icon{width:26px;height:26px;color:var(--blue)}
.map-placeholder p{margin:0;font:400 13px/1.4 var(--page);color:var(--text)}
.map-placeholder button{margin-top:6px;background:#fff;border:1px solid var(--line);color:var(--blue);padding:.6rem 1rem;font:600 13px/1 var(--page);cursor:pointer}
@media(max-width:760px){.contact-grid{grid-template-columns:1fr}.contact-grid>*:nth-child(2){padding-left:0;border-left:0}.form-row{grid-template-columns:1fr}.logo-row{flex-wrap:wrap;justify-content:flex-start;gap:20px 32px}.year-row{grid-template-columns:90px 1fr;gap:16px}.year-row .year{font-size:22px}}

/* ---------- Cards without heavy boxes (topics, audiences) ---------- */
.plain-grid{display:grid;grid-template-columns:repeat(3,1fr);column-gap:40px;row-gap:32px}
.plain-grid.two{grid-template-columns:1fr 1fr;column-gap:56px}
.plain-grid.four{grid-template-columns:repeat(4,1fr);column-gap:32px}
.home-fields{column-gap:32px}
.home-fields h3{letter-spacing:-.01em;white-space:nowrap}
@media(max-width:900px){.home-fields h3{white-space:normal}}
@media(max-width:760px){.plain-grid{grid-template-columns:1fr}}

/* ---------- Inline institution reference (Lehre/Abschlussarbeiten) ---------- */
.institution{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font:400 13px/1 var(--page)}
.institution-logo{height:16px;width:auto;object-fit:contain}

/* ---------- Sitemap ---------- */
.sitemap-grid{display:grid;grid-template-columns:1fr 1fr;column-gap:56px;row-gap:40px}
.sitemap-group h2{margin:0 0 14px;font:700 19px/1.25 var(--page);color:var(--blue);text-transform:uppercase}
.sitemap-group ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:10px}
.sitemap-group a{display:inline-flex;align-items:center;gap:10px;font:400 15px/1.45 var(--page);color:var(--blue)}
@media(max-width:760px){.sitemap-grid{grid-template-columns:1fr}}

/* ---------- 404 ---------- */
.not-found{padding:80px 0;text-align:center}
.not-found h1{font:700 80px/1 var(--page);color:var(--red);margin:0 0 16px}
.not-found p{font:400 15px/1.5 var(--page);color:var(--text)}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .header-inner{height:auto;min-height:64px;flex-wrap:wrap;padding:14px 0;row-gap:10px}
  .site-header nav{width:100%;flex-wrap:wrap;row-gap:8px;margin-left:-14px}
  .site-header nav a{flex:0 0 auto;padding:0 12px}
  .hero-grid.with-portrait{grid-template-columns:1fr}
  .hero-portrait{order:-1;margin:-52px 0 0;height:300px}
  .hero-portrait img{left:0;transform:none;width:260px}
  .plain-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .wrap{width:min(calc(100% - 40px),var(--max))}
  h1.page-title{font-size:clamp(32px,10vw,46px)}
  .hero-subtitle{font-size:clamp(18px,6vw,24px)}
  .plain-grid{grid-template-columns:1fr}
  .logo-row{gap:24px}
  .not-found h1{font-size:64px}
}

/* ---------- Utility classes (CSP: keine Inline-Styles) ---------- */
.m-0{margin:0}
.mt-6{margin-top:6px}
.mt-14{margin-top:14px}
.mt-22{margin-top:22px}
.mb-28{margin-bottom:28px}
.section-note{margin:32px 0 0}
.section-title.large{font-size:26px}
.hero-lede.thesis-title{font-size:22px;margin:0;max-width:34ch}
.entry-links{margin-top:6px;display:flex;gap:16px;flex-wrap:wrap}
.entry-links .text-link{font-size:13px}
.archive-detail .entry-title{font-size:14px}
@media(max-width:900px){.plain-grid.four{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.plain-grid.four{grid-template-columns:1fr}}

/* ---------- Schmale Displays ---------- */
@media(max-width:760px){
  .plain-grid.two,.plain-grid.four{grid-template-columns:1fr 1fr}
  .grid-2>.rows{padding-top:0;border-top:0}
  .year-row.with-logo{grid-template-columns:1fr auto}
  .year-row.with-logo .year{grid-column:1/-1;border-right:0;padding-right:0;margin-bottom:2px}
  .year-row.with-logo.no-year{grid-template-columns:1fr auto}
  .year-row.compact{grid-template-columns:1fr}
  .year-row.compact .year{border-right:0;padding-right:0;margin-bottom:2px}
  .archive-row{grid-template-columns:1fr auto}
  .archive-row .label{display:none}
  .profile-text{column-count:1}
  .footer-main{justify-content:flex-start}
}
@media(max-width:560px){
  .plain-grid.two,.plain-grid.four{grid-template-columns:1fr}
  .year-row{grid-template-columns:1fr}
  .year-row .year{border-right:0;padding-right:0;margin-bottom:2px;font-size:20px}
  .year-row.with-logo{grid-template-columns:1fr auto}
  .num-list li{display:grid;grid-template-columns:22px 1fr;column-gap:14px;row-gap:6px;align-items:baseline}
  .num-list li>b{flex:none}
  .num-list .row-logo{grid-column:2;margin-left:0;width:auto;justify-content:flex-start}
  .logo-row{gap:16px 24px}
  .logo-item{height:40px}
  .hero-actions{gap:10px}
  .btn{padding:11px 14px;font-size:13px}
  .section{padding:32px 0}
  .page-hero{padding:36px 0 32px}
  .hero-portrait{margin-top:-36px;height:240px}
  .hero-portrait img{width:220px}
  .contact-grid{gap:28px}
  .footer-links{gap:10px 14px}
  .section-title.large{font-size:22px}
  h1.page-title{overflow-wrap:anywhere;hyphens:auto}
}