/* FRT Beteiligungs GmbH – editorial business site */
:root{
  --paper:#f1ede4; --paper-2:#e6e0d2; --ink:#1a1b19; --stone:#65675f; --rule:#cfc9ba;
  --forest:#1f4a38; --sand:#dccfa8; --error:#9a2b1c;
  --serif:"Instrument Serif",Georgia,"Times New Roman",serif;
  --sans:"Hanken Grotesk",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --pad:clamp(1.25rem,5vw,4rem); --max:78rem; --sec:clamp(4.5rem,10vw,8.5rem);
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:4.5rem}
body{margin:0;font:400 1.0625rem/1.65 var(--sans);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased}
body.nav-open{overflow:hidden}
svg{display:block}
a{color:inherit}
p,h1,h2,h3,h4,dl,dd,figure,blockquote,ul{margin:0;padding:0}
ul{list-style:none}
h1,h2,h3{font-family:var(--serif);font-weight:400;letter-spacing:-.01em;line-height:1}
h2{font-size:clamp(2.4rem,5.2vw,4.5rem)}
h3{font-size:1.6rem;line-height:1.15}
:focus-visible{outline:2px solid var(--forest);outline-offset:3px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.label{font-size:.9rem;color:var(--forest);font-weight:600;display:flex;align-items:center;gap:.75rem}
.label::before{content:"";width:2.25rem;height:1px;background:currentColor}

/* Buttons and links */
.btn{display:inline-block;padding:.9rem 1.6rem;background:var(--ink);color:var(--paper);border:1px solid var(--ink);font:500 .95rem var(--sans);text-decoration:none;cursor:pointer;transition:background .25s,border-color .25s}
.btn:hover{background:var(--forest);border-color:var(--forest)}
.btn-sm{padding:.5rem 1.1rem;font-size:.875rem}
.link{text-decoration:none;font-weight:500;background:linear-gradient(currentColor,currentColor) 0 100%/100% 1px no-repeat;padding-bottom:3px;transition:background-size .3s var(--ease),color .25s}
.link:hover{background-size:0 1px;color:var(--forest)}

/* Header */
.site-header{position:fixed;inset:0 0 auto;z-index:50;border-bottom:1px solid transparent;transition:background .3s,border-color .3s}
.site-header.scrolled{background:var(--paper);border-color:var(--rule)}
.nav{display:flex;align-items:center;justify-content:space-between;height:5rem;transition:height .3s}
.scrolled .nav{height:3.75rem}
.logo{font-family:var(--serif);font-size:1.9rem;line-height:1;text-decoration:none;display:flex;align-items:baseline;gap:.55rem;position:relative;z-index:2}
.logo small{font:500 .8rem var(--sans);color:var(--stone)}
.menu{display:flex;align-items:center;gap:2rem}
.menu a:not(.btn){font-size:.92rem;text-decoration:none;position:relative;padding:.25rem 0}
.menu a:not(.btn)::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.menu a:not(.btn):hover::after{transform:scaleX(1)}
.burger{display:none;position:relative;z-index:2;width:2.5rem;height:2.5rem;background:none;border:0;cursor:pointer}
.burger span{position:absolute;left:.5rem;right:.5rem;height:1.5px;background:var(--ink);transition:transform .3s var(--ease)}
.burger span:first-child{top:1.05rem}.burger span:last-child{top:1.5rem}
.burger[aria-expanded="true"] span:first-child{transform:translateY(.225rem) rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:translateY(-.225rem) rotate(-45deg)}

/* Hero */
.hero{padding:calc(5rem + clamp(2rem,6vw,5rem)) 0 var(--sec)}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:clamp(2rem,6vw,6rem);align-items:end}
.hero h1{font-size:clamp(3.1rem,7.6vw,7rem);line-height:.96;margin:1.5rem 0 1.75rem}
.lead{max-width:33rem;color:var(--stone);font-size:1.15rem}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:1.75rem;margin-top:2.25rem}
.hero-art{position:relative;aspect-ratio:4/5;margin-bottom:-2rem}
.b{position:absolute}
.b1{inset:0 0 20% 16%;background:var(--forest);color:var(--sand);overflow:hidden;display:grid;place-items:center}
.b1 svg{width:120%;max-width:none}
.b2{left:0;bottom:0;width:50%;aspect-ratio:1;background:radial-gradient(var(--paper) 1.2px,transparent 1.8px) 0 0/14px 14px,var(--ink)}
.b3{right:0;bottom:4%;width:42%;padding:1rem;background:var(--paper);border:1px solid var(--ink);font-size:.78rem;line-height:1.4;color:var(--stone);display:flex;flex-direction:column;gap:.35rem}
.b3 span:first-child{color:var(--ink);font-weight:600}
.hero-meta{display:grid;grid-template-columns:1fr 1fr 2fr;gap:2rem;margin-top:clamp(3rem,7vw,5.5rem);border-top:1px solid var(--ink);padding-top:1.25rem}
.hero-meta dt,.contact dt{font-size:.85rem;color:var(--stone)}
.hero-meta dd{font-weight:500}

/* About */
.about{padding:var(--sec) 0;background:var(--paper-2)}
.about-grid{display:grid;grid-template-columns:repeat(12,1fr);column-gap:2rem;row-gap:3rem}
.about h2{grid-column:1/8}
.about-cols{grid-column:1/8;grid-row:2;display:grid;grid-template-columns:1fr 1fr;gap:2rem;color:var(--stone)}
.about-art{grid-column:9/13;grid-row:1/3;margin-top:3rem}
.art{aspect-ratio:3/4;background:linear-gradient(var(--forest) 0 0) 0 0/100% 62% no-repeat,radial-gradient(circle at 70% 78%,var(--sand) 0 22%,transparent 22.5%),var(--ink)}
figcaption{font-size:.8rem;color:var(--stone);margin-top:.6rem}
.statement{grid-column:3/11;font:italic 400 clamp(1.9rem,3.8vw,3.2rem)/1.12 var(--serif);border-left:2px solid var(--forest);padding-left:1.75rem;margin-top:1rem}
.facts{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;border-top:1px solid var(--rule);padding-top:1.5rem}
.facts strong{display:block;font:400 2.4rem/1 var(--serif)}
.facts span{font-size:.9rem;color:var(--stone)}

/* Services */
.services{padding:var(--sec) 0}
.sec-head{display:grid;grid-template-columns:7fr 4fr;gap:3rem;align-items:end;margin-bottom:clamp(2.5rem,6vw,4.5rem)}
.sec-head p{color:var(--stone)}
.svc-grid{display:grid;grid-template-columns:5fr 7fr;gap:clamp(2rem,5vw,5rem);align-items:start}
.svc-feature{background:var(--paper-2);border:1px solid var(--rule);padding:clamp(1.75rem,3.5vw,3rem);min-height:26rem;display:flex;flex-direction:column;justify-content:flex-end;gap:1.1rem;position:sticky;top:6rem}
.svc-feature .ico{width:4.5rem;height:4.5rem;color:var(--forest);margin-bottom:auto}
.svc-feature h3{font-size:clamp(2.2rem,4vw,3.2rem)}
.svc-feature p{color:var(--stone)}
.svc{display:grid;grid-template-columns:3rem 1fr;gap:1.25rem;padding:1.75rem 0;border-top:1px solid var(--ink);transition:padding-left .3s var(--ease)}
.svc:last-child{border-bottom:1px solid var(--ink)}
.svc:hover{padding-left:.75rem}
.svc .ico{width:2rem;height:2rem;color:var(--forest);margin-top:.15rem}
.svc p{color:var(--stone);margin-top:.5rem;max-width:34rem}

/* Approach */
.approach{background:var(--forest);color:var(--paper);padding:var(--sec) 0}
.approach h2{max-width:48rem}
.ben-grid{display:grid;grid-template-columns:1fr 1fr;column-gap:clamp(2rem,6vw,7rem);margin-top:clamp(3rem,7vw,5rem)}
.ben{border-top:1px solid rgba(241,237,228,.35);padding:1.5rem 0 3rem}
.ben:nth-child(even){transform:translateY(3.5rem)}
.js .ben.reveal:nth-child(even){transform:translateY(5rem)}
.js .ben.reveal.in:nth-child(even){transform:translateY(3.5rem)}
.num{display:block;font:400 clamp(4rem,8vw,6.5rem)/1 var(--serif);color:var(--sand);margin-bottom:1rem}
.ben h3{margin-bottom:.6rem}
.ben p{color:rgba(241,237,228,.78);max-width:28rem}
.approach .ben-grid{padding-bottom:3.5rem}

/* Contact */
.contact{padding:var(--sec) 0}
.contact-grid{display:grid;grid-template-columns:5fr 6fr;gap:clamp(2.5rem,7vw,7rem)}
.contact-info p{color:var(--stone);margin:1.5rem 0 2.5rem;max-width:26rem}
.contact dt{margin-top:1.5rem}
.contact dd{font-size:1.2rem;margin-top:.25rem}
.contact dd a{text-decoration:none;border-bottom:1px solid var(--forest)}
.contact dd a:hover{color:var(--forest)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:0 2rem}
.field{display:flex;flex-direction:column;margin-bottom:1.5rem}
label{font-size:.85rem;font-weight:500;margin-bottom:.35rem}
input,textarea{font:inherit;color:inherit;background:transparent;border:0;border-bottom:1px solid var(--ink);border-radius:0;padding:.55rem 0;transition:border-color .25s}
textarea{resize:vertical;min-height:7rem}
input:focus,textarea:focus{outline:0;border-bottom:2px solid var(--forest);margin-bottom:-1px}
.field.invalid input,.field.invalid textarea{border-bottom-color:var(--error)}
.err{font-size:.82rem;color:var(--error);min-height:1.2rem;margin-top:.3rem}
.status{margin-top:1.5rem;font-size:.95rem}
.status.ok,.status.bad{padding:.9rem 1rem;border-left:3px solid var(--forest);background:var(--paper-2)}
.status.bad{border-color:var(--error)}

/* Footer */
.site-footer{background:var(--ink);color:var(--paper);padding:4rem 0 1.75rem;font-size:.95rem}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1.4fr;gap:3rem}
.site-footer .logo small{color:rgba(241,237,228,.6)}
.foot-text{color:rgba(241,237,228,.7);margin-top:1rem;max-width:26rem}
.site-footer h4{font:500 .85rem var(--sans);color:rgba(241,237,228,.6);margin-bottom:1rem}
.site-footer li{margin-bottom:.4rem}
address{font-style:normal;line-height:1.7}
.site-footer a{text-decoration:none;transition:color .2s}
.site-footer a:hover{color:var(--sand)}
.foot-bar{display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;margin-top:3.5rem;padding-top:1.25rem;border-top:1px solid rgba(241,237,228,.2);font-size:.85rem;color:rgba(241,237,228,.6)}
.foot-bar p:last-child{display:flex;gap:1.5rem}

/* Reveal on scroll */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

/* Tablet and mobile */
@media (max-width:960px){
  .hero-grid,.sec-head,.svc-grid,.contact-grid{grid-template-columns:1fr}
  .hero-art{aspect-ratio:4/3;margin-bottom:0}
  .b1{inset:0 0 18% 22%}.b2{width:34%}.b3{width:36%}
  .about h2,.about-cols,.statement{grid-column:1/-1}
  .about-art{grid-column:1/-1;grid-row:auto;margin-top:0;max-width:22rem}
  .statement{grid-column:1/-1}
  .svc-feature{position:static;min-height:18rem}
}
@media (max-width:860px){
  .burger{display:block}
  .menu{position:fixed;inset:0;z-index:1;background:var(--paper);flex-direction:column;align-items:flex-start;justify-content:center;gap:1.25rem;padding:var(--pad);opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
  .menu.open{opacity:1;visibility:visible}
  .menu a:not(.btn){font:400 2.4rem/1.1 var(--serif)}
  .menu .btn{margin-top:1rem}
}
@media (max-width:640px){
  .hero-meta,.facts,.about-cols,.ben-grid,.row,.foot-grid{grid-template-columns:1fr}
  .ben:nth-child(even),.js .ben.reveal:nth-child(even),.js .ben.reveal.in:nth-child(even){transform:none}
  .approach .ben-grid{padding-bottom:0}
  .ben{padding-bottom:2rem}
  .logo small{display:none}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms!important}
  .js .reveal{opacity:1;transform:none}
}