*{
  box-sizing:border-box;
}

:root{
  --black:#111;
}

body{
  margin:0;
  background:#fff;
  color:var(--black);
  font-family:"acumin-pro", Arial, sans-serif;
  font-weight:300;
  font-style:normal;
  letter-spacing:0.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

button{
  font:inherit;
}


/* =========================================================
   TYPOGRAFIE
========================================================= */

h1,
h2,
h3,
.hero-subline,
.section-kicker{
  font-family:"acumin-pro", Arial, sans-serif;
  font-weight:600;
  font-style:normal;
}

h1{
  font-size:clamp(3rem, 8vw, 6rem);
  line-height:0.95;
  margin-bottom:1.5rem;
  letter-spacing:-0.015em;
}

.hero-subline,
.section-kicker{
  font-size:0.78rem;
  text-transform:uppercase;
  letter-spacing:0.12em;
  opacity:0.65;
}

.hero-claim{
  font-size:clamp(1.2rem, 2.4vw, 2rem);
  max-width:980px;
  line-height:1.28;
  letter-spacing:-0.01em;
  font-weight:300;
  color:rgba(0,0,0,0.58);
  margin:2rem 0 2.4rem;
}

.hero-text{
  max-width:1200px;
  line-height:1.7;
  opacity:0.74;
  font-weight:300;
}


/* =========================================================
   HERO / STARTSEITE
========================================================= */

.hero-section{
  padding:90px 0 50px;
}

.hero-content{
  width:100%;
  max-width:1440px;
}


/* =========================================================
   PUZZLE GRID / STARTSEITE
========================================================= */

.puzzle-grid-section{
  padding:0 0 120px;
}

.puzzle-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:28px;
}

.puzzle-card-image-link{
  position:relative;
  display:block;
  overflow:hidden;
  text-decoration:none;
  color:#111;
  background:#f4f4f4;
}

.puzzle-card-image{
  display:block;
  width:100%;
  aspect-ratio:3 / 2;
  object-fit:cover;
  filter:grayscale(100%);
  transition:filter 0.22s ease;
}

.puzzle-card-overlay{
  position:absolute;
  inset:0;
  display:flex;
  align-items:flex-end;
  justify-content:flex-start;
  padding:22px;
  background:linear-gradient(
    to top,
    rgba(0,0,0,0.46),
    rgba(0,0,0,0.08) 55%,
    rgba(0,0,0,0)
  );
}

.puzzle-card-button{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 18px;
  background:rgba(255,255,255,0.94);
  color:#111;
  border-radius:999px;
  font-size:0.88rem;
  line-height:1;
  font-weight:300;
  letter-spacing:0.03em;
  transition:0.25s ease;
}

.puzzle-card-image-link:hover .puzzle-card-image{
  filter:grayscale(0%);
}

.puzzle-card-image-link:hover .puzzle-card-button{
  background:#111;
  color:#fff;
}

.puzzle-card-content{
  padding-top:18px;
}

.puzzle-card-content h3{
  margin:0 0 8px;
  font-size:1.2rem;
  font-weight:600;
}

.puzzle-card-content p{
  margin:0;
  opacity:0.72;
  line-height:1.5;
}


/* =========================================================
   FOOTER
========================================================= */

.site-footer{
  padding:90px 0 34px;
  border-top:1px solid rgba(0,0,0,0.08);
}

.footer-top{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:60px;
  padding-bottom:64px;
}

.footer-heading{
  margin:0 0 14px;
  font-size:0.82rem;
  text-transform:uppercase;
  letter-spacing:0.12em;
  opacity:0.62;
  font-weight:600;
}

.footer-text{
  margin:0;
  max-width:330px;
  line-height:1.7;
  opacity:0.82;
}

.footer-meta{
  margin:14px 0 0;
  opacity:0.52;
  font-size:0.92rem;
  line-height:1.6;
}

.footer-mail,
.footer-link{
  color:#111;
  text-decoration:none;
  line-height:1.6;
  transition:opacity 0.25s ease;
}

.footer-mail{
  font-size:1rem;
  opacity:0.82;
}

.footer-link{
  display:inline-block;
  margin-top:10px;
  font-size:0.95rem;
  opacity:0.62;
}

.footer-mail:hover,
.footer-link:hover{
  opacity:1;
}

.footer-meta i,
.footer-mail i{
  margin-right:10px;
  font-size:0.92rem;
  opacity:0.72;
}

.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding-top:28px;
  border-top:1px solid rgba(0,0,0,0.08);
}

.footer-copy{
  opacity:0.58;
  font-size:0.92rem;
}

.footer-legal{
  display:flex;
  gap:26px;
}

.footer-legal a{
  color:#111;
  text-decoration:none;
  opacity:0.58;
  transition:opacity 0.25s ease;
}

.footer-legal a:hover{
  opacity:1;
}


/* =========================================================
   BACK TO TOP
========================================================= */

#backToTop{
  position:fixed;
  right:28px;
  bottom:28px;
  width:48px;
  height:48px;
  border:1px solid rgba(0,0,0,0.12);
  border-radius:50%;
  background:rgba(255,255,255,0.94);
  color:#111;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:
    opacity 0.28s ease,
    transform 0.28s ease,
    border-color 0.25s ease;
  z-index:1200;
  backdrop-filter:blur(10px);
}

#backToTop i{
  font-size:0.92rem;
}

#backToTop.is-visible{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

#backToTop:hover{
  border-color:#111;
}

/* =========================================================
   RESPONSIVE
========================================================= */

.mobile-break{
  display:none;
}

@media (max-width:991px){

  .puzzle-grid{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }

  .footer-top{
    grid-template-columns:1fr;
    gap:36px;
    padding-bottom:48px;
  }

}


@media (max-width:768px){

  .hero-section{
    padding:72px 0 42px;
  }

  .mobile-break{
    display:inline;
  }

  h1{
    font-size:clamp(2.3rem, 11vw, 4rem);
    line-height:0.92;
  }

  .hero-claim{
    font-size:clamp(1.45rem, 7vw, 2.3rem);
    line-height:1.08;
  }

  .puzzle-grid{
    grid-template-columns:1fr;
    gap:42px;
  }

  .footer-bottom{
    flex-direction:column;
    align-items:flex-start;
  }

}