/* ================================================================
   Vertex, Mateyka & Wallisch GbR — vertex-software.de
   Schriften lokal eingebunden (DSGVO: keine Verbindung zu Google).
   ================================================================ */

@font-face{
  font-family:'Archivo';
  font-style:normal;
  font-display:swap;
  font-weight:100 900;
  font-stretch:62% 125%;
  src:url('fonts/archivo-latin-wdth-normal.woff2') format('woff2-variations');
}
@font-face{
  font-family:'IBM Plex Sans';
  font-style:normal;font-display:swap;font-weight:400;
  src:url('fonts/ibm-plex-sans-latin-400-normal.woff2') format('woff2');
}
@font-face{
  font-family:'IBM Plex Sans';
  font-style:normal;font-display:swap;font-weight:500;
  src:url('fonts/ibm-plex-sans-latin-500-normal.woff2') format('woff2');
}
@font-face{
  font-family:'IBM Plex Mono';
  font-style:normal;font-display:swap;font-weight:400;
  src:url('fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');
}
@font-face{
  font-family:'IBM Plex Mono';
  font-style:normal;font-display:swap;font-weight:500;
  src:url('fonts/ibm-plex-mono-latin-500-normal.woff2') format('woff2');
}

:root{
  --paper:#F1F0F5;
  --paper-2:#FFFFFF;
  --ink:#15121E;
  --slate:#5F5B72;
  --line:#D8D5E2;
  --violet:#512BD4;

  --display:'Archivo','Helvetica Neue',Arial,sans-serif;
  --body:'IBM Plex Sans',system-ui,-apple-system,Segoe UI,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;

  --pad:clamp(20px,5vw,64px);
  --max:1240px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--body);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;}
img{display:block;max-width:100%;}

.skip{
  position:absolute;left:-9999px;top:0;z-index:99;
  background:var(--ink);color:#fff;padding:12px 18px;
  font-family:var(--mono);font-size:13px;text-decoration:none;
}
.skip:focus{left:8px;top:8px;}

/* ---- Randlinien ---- */
.gridlines{
  position:fixed;inset:0;max-width:var(--max);margin:0 auto;
  padding:0 var(--pad);pointer-events:none;z-index:0;
}
.gridlines i{
  position:absolute;top:0;bottom:0;width:1px;
  background:var(--line);opacity:.55;
}
.gridlines i:nth-child(1){left:var(--pad);}
.gridlines i:nth-child(2){right:var(--pad);}
@media(max-width:720px){ .gridlines{display:none;} }

.wrap{
  position:relative;z-index:1;max-width:var(--max);
  margin:0 auto;padding:0 var(--pad);
}

/* ---- Typo ---- */
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--slate);margin:0 0 18px;
  display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"+";color:var(--violet);font-size:15px;line-height:1;transform:translateY(-1px);}
.h2{
  font-family:var(--display);font-variation-settings:"wdth" 118,"wght" 700;
  font-size:clamp(28px,4.2vw,46px);line-height:1.02;
  letter-spacing:-.02em;text-transform:uppercase;margin:0 0 28px;
}
.lede{font-size:clamp(17px,1.7vw,20px);color:var(--slate);max-width:52ch;margin:0;}

/* ---- Kopfzeile ---- */
.site-head{
  position:relative;z-index:3;display:flex;align-items:center;
  justify-content:space-between;gap:24px;padding-top:26px;padding-bottom:26px;
}
.mark{
  display:flex;align-items:center;gap:11px;text-decoration:none;
  font-family:var(--display);font-variation-settings:"wdth" 125,"wght" 800;
  font-size:17px;letter-spacing:.02em;text-transform:uppercase;
}
.mark svg{width:19px;height:19px;flex:none;display:block;}
.nav{display:flex;gap:26px;align-items:center;}
.nav a{font-family:var(--mono);font-size:13px;text-decoration:none;color:var(--slate);transition:color .18s ease;}
.nav a:hover{color:var(--violet);}
@media(max-width:720px){ .nav .hide-s{display:none;} }

/* ---- Hero ---- */
.hero{
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(260px,.9fr);
  gap:clamp(24px,5vw,64px);align-items:center;
  padding:clamp(40px,7vw,90px) 0 clamp(56px,8vw,104px);
}
.hero > *{min-width:0;}
@media(max-width:900px){ .hero{grid-template-columns:minmax(0,1fr);} }

h1{
  font-family:var(--display);font-variation-settings:"wdth" 112,"wght" 800;
  font-size:clamp(38px,5.9vw,72px);line-height:.96;letter-spacing:-.03em;
  text-transform:uppercase;margin:0 0 26px;
  overflow-wrap:break-word;hyphens:auto;
}
h1 em{font-style:normal;color:var(--violet);}
.hero .lede{margin-bottom:34px;}

.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px;}
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:15px 24px;
  border-radius:2px;text-decoration:none;font-family:var(--mono);
  font-size:13.5px;letter-spacing:.02em;
  border:1px solid var(--ink);background:var(--ink);color:var(--paper);
  transition:background .18s ease,border-color .18s ease,color .18s ease,transform .18s ease;
}
.btn:hover{background:var(--violet);border-color:var(--violet);transform:translateY(-2px);}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn.ghost:hover{background:transparent;color:var(--violet);border-color:var(--violet);}

/* ---- Konstellation ---- */
.constellation{position:relative;min-width:0;}
.constellation svg{
  display:block;width:100%;max-width:520px;height:auto;
  aspect-ratio:460/400;margin-left:auto;margin-right:auto;
}
.edge{stroke:#B6B1C6;stroke-width:1.25;fill:none;}
.edge.hub{stroke:var(--violet);stroke-opacity:.55;}
.node{fill:var(--paper-2);stroke:var(--ink);stroke-width:1.25;}
.node-label{font-family:var(--mono);font-size:10px;fill:var(--slate);letter-spacing:.08em;text-anchor:middle;}
.hub-node{fill:var(--violet);}
.hub-label{text-anchor:start;fill:var(--violet);}
.hub-ring{fill:none;stroke:var(--violet);stroke-width:1;opacity:0;}

@media (prefers-reduced-motion: no-preference){
  .edge{stroke-dasharray:600;stroke-dashoffset:600;animation:draw 1.1s cubic-bezier(.22,.7,.3,1) forwards;}
  .node,.node-label{opacity:0;animation:pop .5s ease forwards;}
  .hub-node{opacity:0;animation:pop .6s cubic-bezier(.2,1.5,.4,1) forwards;animation-delay:1.5s;}
  .hub-ring{transform-box:fill-box;transform-origin:center;animation:pulse 2.8s ease-out infinite;animation-delay:2s;}
}
@keyframes draw{to{stroke-dashoffset:0;}}
@keyframes pop{to{opacity:1;}}
@keyframes pulse{
  0%{opacity:.7;transform:scale(.5);}
  70%{opacity:0;transform:scale(2.4);}
  100%{opacity:0;transform:scale(2.4);}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .btn:hover{transform:none;}
  .reveal{opacity:1 !important;transform:none !important;}
}

/* ---- Massband "seit 2006" ---- */
.since{padding:clamp(30px,4vw,46px) 0;border-top:1px solid var(--line);}
.since-row{display:flex;align-items:center;gap:clamp(18px,3vw,36px);}
.since-year{
  font-family:var(--display);font-variation-settings:"wdth" 118,"wght" 800;
  font-size:clamp(30px,4.4vw,50px);line-height:1;letter-spacing:-.025em;display:block;
}
.since-cap{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--slate);display:block;margin-top:10px;
}
.since-end{flex:none;}
.since-end--right{text-align:right;}
.since-edge{flex:1 1 auto;min-width:70px;position:relative;height:46px;}
.since-edge::before{content:"";position:absolute;top:50%;left:0;right:0;height:1px;background:var(--line);}
.since-edge i{position:absolute;top:50%;width:1px;height:16px;margin-top:-8px;background:var(--violet);}
.since-edge i:first-child{left:0;}
.since-edge i:last-child{right:0;}
.since-span{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  background:var(--paper);padding:0 14px;
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--violet);white-space:nowrap;
}
@media(max-width:700px){
  .since-row{flex-direction:column;align-items:stretch;gap:14px;}
  .since-end--right{text-align:left;}
  .since-edge{height:40px;}
}

/* ---- Abschnitte ---- */
.section{padding:clamp(56px,8vw,104px) 0;border-top:1px solid var(--line);}

.cards{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;background:var(--line);border:1px solid var(--line);
}
@media(max-width:860px){ .cards{grid-template-columns:minmax(0,1fr);} }
.card{
  background:var(--paper-2);padding:clamp(24px,3vw,36px);
  display:flex;flex-direction:column;gap:14px;transition:background .2s ease;
}
.card:hover{background:#FBFAFE;}
.card h3{
  font-family:var(--display);font-variation-settings:"wdth" 115,"wght" 700;
  font-size:20px;text-transform:uppercase;letter-spacing:-.01em;margin:0;
}
.card p{margin:0;color:var(--slate);font-size:15.5px;}
.tags{
  font-family:var(--mono);font-size:11.5px;color:var(--violet);
  letter-spacing:.06em;margin-top:auto;padding-top:10px;
}

/* ---- KI-Band ---- */
.section.band{background:var(--violet);border-top:0;color:#fff;}
.band .eyebrow{color:rgba(255,255,255,.75);}
.band .eyebrow::before{color:#fff;}
.band .h2{color:#fff;}
.band .lede{color:rgba(255,255,255,.86);}
.band-points{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(24px,3vw,40px);margin-top:48px;
}
@media(max-width:860px){ .band-points{grid-template-columns:minmax(0,1fr);} }
.band-point{border-top:1px solid rgba(255,255,255,.36);padding-top:22px;}
.band-point h3{
  font-family:var(--display);font-variation-settings:"wdth" 115,"wght" 700;
  font-size:16px;text-transform:uppercase;margin:0 0 10px;color:#fff;
}
.band-point p{margin:0;color:rgba(255,255,255,.86);font-size:15px;}

/* ---- Stack ---- */
.stack-grid{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px;}
.chip{
  font-family:var(--mono);font-size:13px;padding:8px 14px;
  border:1px solid var(--line);background:var(--paper-2);
  border-radius:2px;color:var(--ink);
}
.chip.key{border-color:var(--violet);color:var(--violet);}

.split{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);
  gap:clamp(20px,4vw,56px);align-items:start;
}
@media(max-width:860px){ .split{grid-template-columns:minmax(0,1fr);} }

/* ---- Fragen ---- */
.faq{border-top:1px solid var(--line);margin-top:8px;}
.faq-item{border-bottom:1px solid var(--line);padding:26px 0;}
.faq-item h3{
  font-family:var(--display);font-variation-settings:"wdth" 112,"wght" 700;
  font-size:17px;margin:0 0 10px;
}
.faq-item p{margin:0;color:var(--slate);font-size:15.5px;max-width:70ch;}

/* ---- Kontakt ---- */
.mailto{
  display:inline-block;font-family:var(--display);
  font-variation-settings:"wdth" 110,"wght" 700;
  font-size:clamp(22px,4.2vw,48px);letter-spacing:-.03em;
  text-decoration:none;line-height:1.05;
  border-bottom:2px solid var(--line);padding-bottom:6px;
  transition:color .2s ease,border-color .2s ease;
  overflow-wrap:break-word;max-width:100%;
}
.mailto:hover{color:var(--violet);border-color:var(--violet);}
.contact-meta{font-family:var(--mono);font-size:13px;color:var(--slate);margin-top:26px;}

/* ---- Fusszeile ---- */
.site-foot{
  border-top:1px solid var(--line);padding:32px 0 44px;
  display:flex;flex-wrap:wrap;gap:16px 28px;
  align-items:center;justify-content:space-between;
  font-family:var(--mono);font-size:12.5px;color:var(--slate);
}
.site-foot a{color:var(--slate);text-decoration:underline;text-underline-offset:3px;transition:color .18s ease;}
.site-foot a:hover{color:var(--violet);}
.foot-links{display:flex;gap:22px;flex-wrap:wrap;}

/* ---- Rechtsseiten ---- */
.legal{padding:clamp(30px,6vw,60px) 0 clamp(50px,8vw,90px);max-width:74ch;}
.legal h1{font-size:clamp(32px,5.5vw,58px);margin-bottom:34px;}
.legal h2{
  font-family:var(--display);font-variation-settings:"wdth" 112,"wght" 700;
  font-size:17px;text-transform:uppercase;letter-spacing:.01em;margin:40px 0 10px;
}
.legal h3{
  font-family:var(--display);font-variation-settings:"wdth" 112,"wght" 600;
  font-size:15px;margin:24px 0 8px;
}
.legal p,.legal li{margin:0 0 14px;color:#3A354A;font-size:15.5px;}
.legal ul{padding-left:20px;}
.legal a{color:var(--violet);}
.todo{
  background:#FFF8E1;border-left:3px solid #E0A800;
  padding:14px 18px;margin:0 0 20px;font-size:14.5px;
}
.back{
  font-family:var(--mono);font-size:13px;text-decoration:none;color:var(--slate);
  display:inline-flex;gap:8px;align-items:center;margin-bottom:8px;
}
.back:hover{color:var(--violet);}

/* ---- Reveal ---- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s cubic-bezier(.22,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}
.no-js .reveal{opacity:1;transform:none;}

:focus-visible{outline:2px solid var(--violet);outline-offset:3px;}