/* ═══════════════════════════════════════════════════════════
   STUDIO FRENK – main.css
   1 Tokens & Basis · 2 Kopfzeile & Fuß · 3 Hero · 4 Startseite
   5 Studio · 6 Kontakt & Rechtshinweise · 7 Projektseiten (Case)
   8 Mobile · 9 Reveal
   ═══════════════════════════════════════════════════════════ */

/* ─── 1 Tokens & Basis ─── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --black:#090909;
  --white:#FFFFFF;
  --offwhite:#ECEAE3;
  --bg:var(--black);
  --fg:var(--offwhite);
  --border:rgba(236,234,227,.1);
  --line:rgba(236,234,227,.35);          /* Rahmen von Buttons */
  --display:'freight-display-pro',serif;
  --body:'Poppins',sans-serif;
  --gutter:1.75rem;                      /* Außenrand */
  --text:1.25rem;                        /* Fließtext */
  --text-lh:1.6;

  /* Projektseiten (Vorbild MetaDesign, bei 1440 px gemessen) */
  --case-side:64px;
  --case-col:668px;
  --case-media:78%;
  --case-img-gap:18px;
  --case-hero-ratio:2/1;
  --case-h1:86px;
  --case-h2:48px;
  --case-track:.01em;
  --case-hero-to-h1:106px;
  --case-h2-to-text:32px;
  --case-p-gap:16px;
  --case-text-to-img:128px;
  --case-img-to-h2:105px;
  --case-bottom:140px;
}

html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:var(--body);overflow-x:hidden}
img{max-width:100%}
picture{display:contents}
p{font-family:var(--body);font-size:var(--text);line-height:var(--text-lh)}

/* Freight Display Pro: Headlines in Versalien, Kursiv in Gemischtschreibung */
.display{font-family:var(--display);font-weight:400;text-transform:uppercase;letter-spacing:.01em;line-height:.95}

.label{font-family:var(--body);font-size:.58rem;letter-spacing:.18em;text-transform:uppercase;opacity:.28}

/* ─── 2 Kopfzeile & Fuß ─── */
header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:1.25rem var(--gutter);
  display:flex;justify-content:space-between;align-items:center;
  mix-blend-mode:difference;
}
.header-logo{height:16px;width:auto;display:block}
nav{display:flex;gap:2rem;align-items:center}
nav a{
  font-family:var(--body);font-size:.68rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--fg);text-decoration:none;opacity:.4;transition:opacity .2s;
}
nav a:hover,nav a[aria-current="page"]{opacity:1}
nav .nav-cta{opacity:1;padding:.4rem 1rem;border:1px solid var(--line);transition:background .2s,color .2s}
nav .nav-cta:hover{background:var(--fg);color:var(--bg)}

.btn-outline{
  display:inline-block;font-family:var(--body);font-size:.68rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--fg);text-decoration:none;
  padding:.5rem 1.1rem;border:1px solid var(--line);transition:background .2s,color .2s;
}
.btn-outline:hover{background:var(--fg);color:var(--bg)}

.section-bar{
  padding:1rem var(--gutter);border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
}
.section-bar span{font-family:var(--body);font-size:.58rem;letter-spacing:.18em;text-transform:uppercase;opacity:.28}

footer{padding:3.5rem var(--gutter) 0;border-top:1px solid var(--border)}
.footer-main{display:flex;justify-content:flex-end;padding-bottom:3.5rem;border-bottom:1px solid var(--border)}
.footer-right{display:flex;flex-direction:column;gap:.65rem;align-items:flex-end}
.footer-email{font-family:var(--body);font-size:.9rem;color:var(--fg);text-decoration:none;opacity:.85;transition:opacity .2s}
.footer-email:hover{opacity:.45}
.footer-addr{font-family:var(--body);font-size:.72rem;opacity:.25;text-align:right;line-height:1.7}
.footer-bottom{padding:1.25rem 0;display:flex;justify-content:space-between;align-items:center}
.footer-bottom p,.footer-bottom a{
  font-family:var(--body);font-size:.58rem;letter-spacing:.1em;
  text-transform:uppercase;opacity:.18;color:var(--fg);text-decoration:none;transition:opacity .2s;
}
.footer-bottom a:hover{opacity:.5}
.footer-bottom-links{display:flex;gap:1.25rem}

/* ─── 3 Hero (Startseite, Studio, 404) ─── */
.hero{
  min-height:100svh;display:flex;flex-direction:column;justify-content:flex-end;
  padding:var(--gutter) var(--gutter) 3rem;position:relative;overflow:hidden;
}
.hero-headline{font-size:clamp(2.6rem,9.5vw,9.5rem);max-width:92%}
.hero-headline .line{display:block;overflow:hidden}
.hero-headline .line span{display:block;transform:translateY(110%);animation:slideUp .85s cubic-bezier(.16,1,.3,1) both}
.hero-headline .line:nth-child(2) span{animation-delay:.07s}
.hero-headline .italic{font-style:italic;text-transform:none;letter-spacing:0}
@keyframes slideUp{to{transform:translateY(0)}}

/* Studio: Hintergrundbild mit Verlauf, Name auf einer Zeile */
.hero--studio{min-height:clamp(560px,100svh,1000px)}
.hero--studio::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(to top,rgba(9,9,9,.75) 0%,transparent 45%);
  pointer-events:none;z-index:2;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:url(/images/studio-hero.jpg);
  background-image:image-set(url(/images/studio-hero.webp) type("image/webp"),url(/images/studio-hero.jpg) type("image/jpeg"));
  background-size:cover;background-position:center;
}
.hero-content{position:relative;z-index:3}
.hero--studio .hero-headline{white-space:nowrap}
.hero--studio .hero-headline .line{display:inline-block}

/* Studio, nur Desktop: Hero bleibt beim Scrollen stehen, das Bild schrumpft (js/main.js setzt die Skalierung) */
@media(min-width:769px){
  .hero-scroll{height:200vh;background:var(--black)}
  .hero-scroll .hero{position:sticky;top:0;height:clamp(560px,100svh,1000px);min-height:0;overflow:visible}
  .hero-scroll .hero-content{left:var(--gutter);bottom:3rem}   /* Position wird von js/main.js zwischen fixed und absolute umgeschaltet */
  .hero-scroll .hero-bg{transform-origin:center;will-change:transform}
}

/* 404 */
.page-404{min-height:100svh;display:flex;flex-direction:column}
.page-404 .hero{flex:1}
.hero-code{display:block;margin-bottom:1.5rem}
.hero-back{margin-top:2.5rem}

/* ─── 4 Startseite ─── */
.rotate-badge{
  position:fixed;bottom:2rem;right:2rem;width:110px;height:110px;
  animation:spin 50s linear infinite;pointer-events:none;z-index:50;transition:opacity .4s ease;
}
.rotate-badge .cls-1{fill:#fff}
.rotate-badge .cls-2{opacity:.3}
@keyframes spin{to{transform:rotate(360deg)}}

.projects{display:grid;grid-template-columns:1fr 1fr}
.project-item{display:block;position:relative;overflow:hidden;aspect-ratio:16/10;color:var(--fg);text-decoration:none}
.project-item:focus-visible{outline:1px solid var(--fg);outline-offset:-1px}
.project-item img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .7s cubic-bezier(.25,.46,.45,.94)}
.project-item:hover img{transform:scale(1.04)}
.project-overlay{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(9,9,9,.85) 0%,transparent 60%);
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:1.5rem;opacity:0;transition:opacity .35s;pointer-events:none;
}
.project-item:hover .project-overlay,.project-item:focus-visible .project-overlay{opacity:1}
.proj-tag{font-family:var(--body);font-size:.56rem;letter-spacing:.14em;text-transform:uppercase;color:var(--fg);opacity:.45;margin-bottom:.4rem}
.proj-caption{
  font-family:var(--display);font-style:italic;font-weight:400;
  font-size:clamp(.95rem,1.6vw,1.55rem);line-height:1.15;color:var(--fg);
  transform:translateY(6px);transition:transform .35s .04s;
}
.project-item:hover .proj-caption{transform:translateY(0)}
.proj-num{position:absolute;top:1rem;left:1.25rem;font-family:var(--body);font-size:.56rem;letter-spacing:.1em;opacity:.2}
.proj-link{
  position:absolute;top:1rem;right:1.25rem;width:28px;height:28px;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity .3s,border-color .3s;text-decoration:none;z-index:10;pointer-events:auto;
}
.project-item:hover .proj-link{opacity:1;border-color:rgba(236,234,227,.4)}
.proj-link svg{width:10px;height:10px;stroke:var(--fg)}

/* ─── 5 Studio ─── */
.studio-section{
  padding:140px var(--gutter) 160px;background:var(--black);color:var(--offwhite);
  display:flex;flex-direction:column;align-items:center;text-align:center;
}
.studio-portrait{width:420px;aspect-ratio:3/4;margin:0 auto;overflow:hidden;flex-shrink:0}
.studio-portrait img{width:100%;height:100%;object-fit:cover;display:block}
.studio-handwriting{display:block;width:100%;max-width:960px;height:auto;margin:56px auto 0}
.studio-text{margin-top:56px;color:var(--offwhite);max-width:620px;margin-left:auto;margin-right:auto}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ─── 6 Kontakt & Rechtshinweise ─── */
.page-title{padding:10rem var(--gutter) 4rem}
.page-title h1{font-size:clamp(2.5rem,7vw,7rem)}
.page-title--legal{border-bottom:1px solid var(--border)}
.page-title--legal h1{line-height:.92;letter-spacing:-.02em}
.page-title h1 em{font-style:italic}

.contact{display:grid;grid-template-columns:1fr 2fr;gap:5rem;padding:4.5rem var(--gutter);align-items:start}
.contact-left .label{display:block}
.contact-right{display:flex;flex-direction:column;gap:2rem}
.contact-mail{
  font-family:var(--body);font-weight:400;font-size:clamp(1.3rem,2.6vw,2.2rem);line-height:1.3;
  color:var(--fg);text-decoration:none;opacity:.9;transition:opacity .2s;word-break:break-word;
}
.contact-mail:hover{opacity:.45}
.contact-addr{font-family:var(--body);font-size:.88rem;line-height:2;opacity:.55;font-style:normal}

.legal-content{display:grid;grid-template-columns:1fr 2fr;max-width:100%}
.legal-block{display:contents}
.legal-label{padding:3rem var(--gutter);border-right:1px solid var(--border);border-bottom:1px solid var(--border)}
.legal-label span{font-family:var(--body);font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;opacity:.28;position:sticky;top:6rem;display:block}
.legal-body{padding:3rem var(--gutter);border-bottom:1px solid var(--border)}
.legal-body h2{font-family:var(--display);font-weight:400;font-style:italic;font-size:clamp(1.2rem,2vw,1.6rem);margin-bottom:1.5rem;line-height:1.1}
.legal-body h3{font-family:var(--body);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;opacity:.4;margin:2rem 0 .75rem}
.legal-body p{opacity:.45;margin-bottom:1rem;max-width:640px}
.legal-body p:last-child{margin-bottom:0}
.legal-body a{color:var(--fg);opacity:.7;transition:opacity .2s}
.legal-body a:hover{opacity:1}
.legal-address{font-family:var(--body);font-size:.82rem;line-height:2;opacity:.45;font-style:normal}

/* ─── 7 Projektseiten (Case) ─── */
.page-case{--bg:var(--white);--fg:var(--black);--border:rgba(9,9,9,.1)}
/* Kopfzeile bleibt weiß und wird per Differenz-Blend schwarz auf Weiß, weiß über dem Header-Bild */
.page-case header{--fg:var(--offwhite);--bg:var(--black);mix-blend-mode:difference}

.case{padding:0 0 var(--case-bottom)}
.case figure{margin-block:0}
.case img{width:100%;height:auto;display:block}
.case-hero{width:100%;aspect-ratio:var(--case-hero-ratio);overflow:hidden}
.case-hero img{width:100%;height:100%;object-fit:cover;object-position:center}
.case-col{width:min(var(--case-col),100% - 2*var(--case-side));margin-inline:auto}
.case .case-media{width:var(--case-media);margin-inline:auto}
.case-media+.case-media{margin-top:var(--case-img-gap)}
.case-pair{display:grid;grid-template-columns:1fr 1fr;gap:var(--case-img-gap)}
.case-wide{aspect-ratio:16/9;overflow:hidden}
.case-wide img{width:100%;height:100%;object-fit:cover;object-position:center}
.case-video{aspect-ratio:16/9;overflow:hidden;background:var(--black)}
.case-video video{width:100%;height:100%;object-fit:cover;display:block}
.case p+p{margin-top:var(--case-p-gap)}
.case-head{margin-top:var(--case-hero-to-h1)}
.case-head h1{font-size:var(--case-h1);letter-spacing:var(--case-track)}
.case-meta{display:block;margin-top:24px;font-family:var(--body);font-size:12px;letter-spacing:.18em;text-transform:uppercase;opacity:.5}
.case-intro{margin-top:var(--case-h2-to-text)}
.case-chapter{margin-top:var(--case-text-to-img)}
.case-chapter .case-col{margin-top:var(--case-img-to-h2)}
.case-chapter h2{font-size:var(--case-h2);letter-spacing:var(--case-track);margin-bottom:var(--case-h2-to-text)}
.case-end{margin-top:var(--case-text-to-img)}
.case-label{display:block;font-family:var(--body);font-size:12px;letter-spacing:.18em;text-transform:uppercase;opacity:.5;margin-bottom:16px}
.case-link{
  display:inline-block;margin-top:32px;font-family:var(--body);font-size:var(--text);line-height:var(--text-lh);
  color:var(--fg);text-decoration:underline;text-underline-offset:.2em;text-decoration-thickness:1px;transition:opacity .2s;
}
.case-link:hover{opacity:.5}
.case-next{margin-top:96px}
.case-next:has(a[href=""]){display:none}   /* Vorlage: ohne Ziel kein Block */
.case-next a{font-size:var(--case-h2);letter-spacing:var(--case-track);color:var(--fg);text-decoration:none;transition:opacity .2s}
.case-next a:hover{opacity:.5}

/* ─── 8 Mobile ─── */
@media(max-width:768px){
  :root{
    --gutter:1.25rem;
    --case-side:16px;
    --case-media:calc(100% - 32px);
    --case-hero-ratio:4/3;
    --case-h1:48px;
    --case-h2:36px;
    --case-hero-to-h1:64px;
    --case-img-to-h2:63px;
    --case-h2-to-text:19px;
    --case-text-to-img:77px;
    --case-bottom:80px;
  }
  header{padding:1rem var(--gutter);mix-blend-mode:normal}
  .page-case header{mix-blend-mode:difference}
  .header-logo{height:13px}
  nav{gap:1.25rem}
  nav a{font-size:.62rem}
  nav .nav-home{display:none}
  .section-bar{padding:.85rem var(--gutter)}
  footer{padding:2.5rem var(--gutter) 0}
  .footer-main{padding-bottom:2.5rem}
  .footer-right{align-items:flex-start}
  .footer-addr{text-align:left}
  .footer-bottom{flex-direction:column;gap:.75rem;align-items:flex-start;padding:1rem 0}

  .hero{padding:var(--gutter) var(--gutter) 2.5rem}
  .hero--center{justify-content:center;align-items:center;text-align:center}
  .hero--studio{min-height:clamp(560px,100svh,1000px)}
  .hero-headline{font-size:clamp(2.4rem,11vw,4.5rem);max-width:100%}

  .projects{grid-template-columns:1fr}
  .project-overlay{opacity:1;background:linear-gradient(to top,rgba(9,9,9,.8) 0%,transparent 60%)}
  .proj-caption{transform:none}

  .studio-section{padding:96px var(--gutter) 120px}
  .studio-portrait{width:calc(100vw - 2.5rem);max-width:none}

  .page-title{padding:7rem var(--gutter) 2.5rem}
  .contact{grid-template-columns:1fr;gap:1.5rem;padding:3rem var(--gutter)}
  .legal-content{grid-template-columns:1fr}
  .legal-label{border-right:none;border-bottom:none;padding:2rem var(--gutter) .25rem}
  .legal-label span{position:static}
  .legal-body{padding:1rem var(--gutter) 2.5rem}
  .legal-body p{max-width:100%}

  .case-pair{grid-template-columns:1fr}
  .case-next{margin-top:64px}

  /* ─── 9 Reveal: Elemente mit .reveal blenden beim Scrollen ein (js/main.js) ─── */
  .reveal{opacity:0;transform:translateY(24px);transition:opacity .7s cubic-bezier(.22,.61,.36,1),transform .7s cubic-bezier(.22,.61,.36,1)}
  .reveal.in-view{opacity:1;transform:none}
}