/* =====================================================================
   ATASOY · Heizung & Sanitär & Solartechnik — shared theme
   ===================================================================== */
:root{
  --ink:#0c0c0e; --ink-2:#141417; --ink-3:#1b1b1f;
  --sand:#c8b9a2; --sand-soft:#ddd3c3; --paper:#f3efe7; --champagne:#c6a972;
  --text:#ece8e0; --text-soft:rgba(236,232,224,.62); --text-faint:rgba(236,232,224,.40);
  --line:rgba(236,232,224,.12);
  --font:"Manrope",system-ui,-apple-system,"Segoe UI",sans-serif;
  --container:1240px; --pad:clamp(1.25rem,5vw,4rem); --radius:18px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{margin:0;font-family:var(--font);font-weight:300;color:var(--text);background:var(--ink);
  line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;}
img{display:block;max-width:100%;}
h1,h2,h3{margin:0;font-weight:300;letter-spacing:-.02em;line-height:1.05;}
p{margin:0;} a{color:inherit;text-decoration:none;} ul,ol{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--pad);}
.skip-link{position:absolute;left:-999px;top:0;z-index:200;background:var(--paper);color:var(--ink);padding:.75rem 1.25rem;border-radius:0 0 10px 0;}
.skip-link:focus{left:0;}
:focus-visible{outline:2px solid var(--champagne);outline-offset:3px;border-radius:4px;}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-size:.92rem;font-weight:500;
  letter-spacing:.01em;padding:.85rem 1.6rem;border-radius:999px;border:1px solid transparent;cursor:pointer;
  transition:transform .4s var(--ease),background .4s var(--ease),color .4s var(--ease),border-color .4s var(--ease);white-space:nowrap;}
.btn--solid{background:var(--paper);color:var(--ink);}
.btn--solid:hover{transform:translateY(-2px);background:#fff;}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--line);backdrop-filter:blur(8px);}
.btn--ghost:hover{border-color:var(--sand);color:var(--paper);transform:translateY(-2px);}
.btn--lg{padding:1.05rem 2.1rem;font-size:1rem;}

/* Nav */
.nav{position:fixed;inset:0 0 auto 0;z-index:100;border-bottom:1px solid transparent;will-change:transform;
  transition:background .5s var(--ease),backdrop-filter .5s var(--ease),border-color .5s var(--ease),transform .45s var(--ease);}
.nav.is-hidden{transform:translateY(-100%);}
.nav.is-open.is-hidden{transform:none;}
.nav.is-scrolled,.nav.is-solid{background:rgba(12,12,14,.72);backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);border-bottom-color:var(--line);}
.nav__inner{max-width:var(--container);margin-inline:auto;padding:1.1rem var(--pad);display:flex;align-items:center;justify-content:space-between;gap:1.5rem;}
.nav__logo{display:flex;align-items:center;gap:.7rem;}
.nav__logo img{height:26px;width:auto;display:block;}
.footer__brand img{height:34px;width:auto;display:block;}
.nav__logo-mark{display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--sand);border-radius:50%;color:var(--sand);font-weight:600;font-size:1.05rem;}
.nav__logo-text{display:flex;flex-direction:column;font-weight:600;letter-spacing:.22em;font-size:.95rem;line-height:1.1;}
.nav__logo-text small{font-weight:400;letter-spacing:.18em;font-size:.58rem;color:var(--text-soft);margin-top:2px;}
.nav__links{display:flex;gap:2.2rem;margin-left:auto;}
.nav__links a{position:relative;font-size:.9rem;color:var(--text-soft);transition:color .3s var(--ease);}
.nav__links a::after{content:"";position:absolute;left:0;bottom:-6px;width:100%;height:1px;background:var(--sand);transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease);}
.nav__links a:hover,.nav__links a[aria-current="page"]{color:var(--paper);}
.nav__links a[aria-current="page"]::after,.nav__links a:hover::after{transform:scaleX(1);}
.nav__cta{margin-left:.5rem;}
.nav__burger{display:none;flex-direction:column;gap:6px;width:42px;height:42px;align-items:center;justify-content:center;background:transparent;border:1px solid var(--line);border-radius:12px;cursor:pointer;}
.nav__burger span{width:18px;height:1.5px;background:var(--text);transition:transform .4s var(--ease),opacity .3s var(--ease);}
.nav.is-open .nav__burger span:nth-child(1){transform:translateY(3.75px) rotate(45deg);}
.nav.is-open .nav__burger span:nth-child(2){transform:translateY(-3.75px) rotate(-45deg);}
.nav__mobile{display:none;flex-direction:column;gap:.4rem;padding:.5rem var(--pad) 1.75rem;background:rgba(12,12,14,.95);backdrop-filter:blur(18px);border-bottom:1px solid var(--line);}
.nav.is-open .nav__mobile{display:flex;}
.nav__mobile a{padding:.85rem 0;font-size:1.1rem;color:var(--text-soft);border-bottom:1px solid var(--line);}
.nav__mobile .btn{margin-top:1rem;}

/* ===== Cinematic intro (index only) ===== */
.intro{position:relative;}
.intro__viewport{position:relative;height:100vh;height:100svh;width:100%;overflow:hidden;background:var(--ink);}
.intro__layer{position:absolute;inset:0;margin:0;will-change:opacity;transform:translateZ(0);backface-visibility:hidden;
  background:radial-gradient(120% 90% at 40% 35%,rgba(60,50,38,.9),var(--ink) 70%);}
.intro__layer picture{display:block;width:100%;height:100%;}
.intro__layer img{width:100%;height:100%;object-fit:cover;object-position:var(--focus-x,50%) var(--focus-y,50%);filter:brightness(1.06) contrast(1.03) saturate(1.04);}
.intro__layer[data-layer="0"]{z-index:3;}
.intro__layer[data-layer="1"]{z-index:2;}
.intro__layer[data-layer="2"]{z-index:1;}
/* Auto crossfade slideshow — all viewports, no scroll-jack */
.intro__layer{opacity:0;animation:introCycle 15s linear infinite;}
.intro__layer[data-layer="1"]{animation-delay:5s;}
.intro__layer[data-layer="2"]{animation-delay:10s;}
@keyframes introCycle{0%{opacity:0}6%{opacity:1}30%{opacity:1}36%{opacity:0}100%{opacity:0}}
.no-motion .intro__layer{animation:none;}
.no-motion .intro__layer[data-layer="0"]{opacity:1;}
.intro--paused .intro__layer{animation-play-state:paused;}
.intro__vignette{position:absolute;inset:0;z-index:5;pointer-events:none;
  background:radial-gradient(130% 100% at 60% 45%,transparent 50%,rgba(8,7,6,.40) 100%),
  linear-gradient(180deg,rgba(10,9,8,.30) 0%,transparent 30%,transparent 62%,rgba(8,7,6,.55) 100%);}
.intro__dip{position:absolute;inset:0;z-index:6;pointer-events:none;opacity:0;background:radial-gradient(130% 110% at 50% 45%,rgba(20,16,12,.2),rgba(6,5,4,.95));}
.intro__grain{position:absolute;inset:0;z-index:7;pointer-events:none;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}
.intro__copy{position:absolute;inset:0;z-index:8;display:grid;place-items:center stretch;padding:var(--pad);pointer-events:none;}
.intro__scene{grid-area:1/1;text-align:center;width:100%;max-width:1000px;margin-inline:auto;will-change:transform,opacity;}
.intro__scene[data-scene="1"],.intro__scene[data-scene="2"]{opacity:0;}
.intro__eyebrow{font-size:.78rem;letter-spacing:.32em;text-transform:uppercase;color:var(--champagne);margin-bottom:1.5rem;}
.intro__title{font-size:clamp(2.4rem,6.4vw,5.4rem);font-weight:200;letter-spacing:-.03em;text-shadow:0 8px 60px rgba(0,0,0,.5);}
.intro__sub{margin-top:1.6rem;font-size:clamp(.95rem,1.6vw,1.15rem);color:var(--text-soft);letter-spacing:.02em;}
.intro__hint{position:absolute;left:50%;bottom:2.2rem;transform:translateX(-50%);z-index:8;display:flex;flex-direction:column;align-items:center;gap:.7rem;font-size:.7rem;letter-spacing:.28em;text-transform:uppercase;color:var(--text-faint);}
.intro__hint i{width:1px;height:38px;background:linear-gradient(var(--sand),transparent);animation:hintPulse 2.4s var(--ease) infinite;}
@keyframes hintPulse{0%,100%{transform:scaleY(.4);opacity:.4;transform-origin:top;}50%{transform:scaleY(1);opacity:1;transform-origin:top;}}

/* ===== Page hero (subpages) ===== */
.page-hero{position:relative;min-height:62vh;display:flex;align-items:flex-end;overflow:hidden;}
.page-hero__img{position:absolute;inset:0;}
.page-hero__img img{width:100%;height:100%;object-fit:cover;filter:brightness(1.18) contrast(1.04) saturate(1.05);}
.page-hero__veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,9,8,.55) 0%,rgba(10,9,8,.2) 35%,rgba(8,7,6,.85) 100%);}
.page-hero__inner{position:relative;z-index:2;width:100%;max-width:var(--container);margin-inline:auto;padding:0 var(--pad) clamp(3rem,6vw,5rem);}
.page-hero__eyebrow{font-size:.74rem;letter-spacing:.3em;text-transform:uppercase;color:var(--champagne);margin-bottom:1.1rem;}
.page-hero__title{font-size:clamp(2.4rem,6vw,5rem);font-weight:200;}
.page-hero__lead{margin-top:1.3rem;max-width:58ch;color:var(--text-soft);font-size:clamp(1rem,1.5vw,1.2rem);}
.crumbs{font-size:.8rem;letter-spacing:.04em;color:var(--text-faint);margin-bottom:1.4rem;}
.crumbs a:hover{color:var(--sand);}

/* ===== Sections / shared ===== */
.section{padding:clamp(5rem,12vw,10rem) 0;position:relative;}
.section--tight{padding:clamp(3.5rem,8vw,6rem) 0;}
.section__eyebrow{font-size:.74rem;letter-spacing:.3em;text-transform:uppercase;color:var(--champagne);margin-bottom:1.4rem;}
.section__title{font-size:clamp(2rem,4.6vw,3.6rem);font-weight:200;}
.section__lead{margin-top:1.6rem;max-width:56ch;color:var(--text-soft);font-size:clamp(1rem,1.4vw,1.18rem);}
.section__head{max-width:60ch;margin-bottom:clamp(3rem,6vw,5rem);}
.section__head--center{margin-inline:auto;text-align:center;}
.section__head--center .section__title{margin-inline:auto;}

/* Service rows (leistungen) */
.svc{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,5rem);align-items:center;padding:clamp(3rem,7vw,6rem) 0;border-top:1px solid var(--line);}
.svc:nth-child(even) .svc__media{order:2;}
.svc__media{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:3/2;}
.svc__media img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease);}
.svc:hover .svc__media img{transform:scale(1.05);}
.svc__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(8,7,6,.5));}
.svc__num{font-size:.8rem;letter-spacing:.2em;color:var(--champagne);margin-bottom:1.2rem;}
.svc__title{font-size:clamp(1.7rem,3.2vw,2.6rem);font-weight:300;margin-bottom:1.2rem;}
.svc__text{color:var(--text-soft);font-size:1.02rem;}
.svc__list{margin-top:1.6rem;display:grid;gap:.6rem;}
.svc__list li{position:relative;padding-left:1.4rem;color:var(--text-soft);}
.svc__list li::before{content:"";position:absolute;left:0;top:.7em;width:7px;height:7px;border-radius:50%;background:var(--champagne);}

/* Cards grid (used on index leistungen teaser etc.) */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;}
.card{position:relative;padding:clamp(1.75rem,3vw,2.6rem);background:linear-gradient(160deg,rgba(255,255,255,.035),rgba(255,255,255,.01));border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .5s var(--ease),background .5s var(--ease);}
.card::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;background:linear-gradient(160deg,rgba(198,169,114,.5),transparent 40%);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .5s var(--ease);}
.card:hover{transform:translateY(-6px);background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));}
.card:hover::before{opacity:1;}
.card__num{display:block;font-size:.8rem;letter-spacing:.2em;color:var(--champagne);margin-bottom:2.5rem;}
.card__title{font-size:1.4rem;font-weight:400;margin-bottom:.9rem;}
.card__text{color:var(--text-soft);font-size:.98rem;}
.card--link:hover{cursor:pointer;}

/* Split (about / image+text) */
.split{display:grid;grid-template-columns:1.05fr .95fr;column-gap:clamp(2.5rem,6vw,6rem);align-items:center;
  grid-template-areas:"media body" "media cta";}
.split--reverse{grid-template-columns:.95fr 1.05fr;grid-template-areas:"body media" "cta media";}
.split__media{grid-area:media;position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;}
.split__media img{width:100%;height:100%;object-fit:cover;}
.split__media--portrait{aspect-ratio:4/5;}
.split__body{grid-area:body;}
.split__cta{grid-area:cta;margin-top:1.8rem;}
/* Compact, centered image feature (e.g. Über-uns teaser) */
.split--feature{grid-template-columns:.82fr 1.18fr;}
.split--feature .split__media{max-width:380px;width:100%;margin-inline:auto;}

/* Stats / values */
.values{display:grid;grid-template-columns:1fr 1fr;gap:2.4rem 2.6rem;}
.values li{border-top:1px solid var(--line);padding-top:1.3rem;}
.values span{display:block;font-size:1.18rem;font-weight:400;margin-bottom:.6rem;color:var(--paper);}
.values p{color:var(--text-soft);font-size:.95rem;}

/* Process */
.process__list{display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem;}
.process__step{position:relative;padding:2.4rem 1.6rem;border-top:1px solid var(--line);}
.process__step h3{font-size:1.35rem;font-weight:400;margin:1.4rem 0 .7rem;}
.process__step p{color:var(--text-soft);font-size:.95rem;}
.process__num{font-size:.85rem;letter-spacing:.2em;color:var(--champagne);}

/* Projects gallery */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem;}
.gallery__item{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;}
.gallery__item img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s var(--ease);}
.gallery__item:hover img{transform:scale(1.06);}
.gallery__cap{position:absolute;inset:auto 0 0 0;padding:1.4rem;background:linear-gradient(180deg,transparent,rgba(8,7,6,.85));font-size:1rem;color:var(--paper);z-index:2;}
.gallery__tag{display:block;font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:var(--champagne);margin-bottom:.35rem;}

/* Contact */
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(2.5rem,6vw,5rem);align-items:start;}
.info{display:grid;gap:1.6rem;}
.info__row{border-top:1px solid var(--line);padding-top:1.2rem;}
.info__label{font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--text-faint);margin-bottom:.5rem;}
.info__value{font-size:1.15rem;color:var(--paper);}
.info__value a:hover{color:var(--sand);}
.info__sub{color:var(--text-soft);font-size:.92rem;margin-top:.2rem;}
.form{display:grid;gap:1.1rem;}
.form__row{display:grid;gap:1.1rem;grid-template-columns:1fr 1fr;}
.field{display:grid;gap:.5rem;}
.field label{font-size:.8rem;letter-spacing:.04em;color:var(--text-soft);}
.field input,.field textarea,.field select{width:100%;background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:12px;
  padding:.9rem 1rem;color:var(--text);font-family:inherit;font-size:.98rem;transition:border-color .3s var(--ease),background .3s var(--ease);}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--sand);background:rgba(255,255,255,.05);}
.field textarea{min-height:140px;resize:vertical;}
.form__note{font-size:.82rem;color:var(--text-faint);}
.map{margin-top:clamp(3rem,6vw,5rem);border-radius:var(--radius);overflow:hidden;aspect-ratio:16/7;position:relative;}
.map img{width:100%;height:100%;object-fit:cover;}

/* CTA band */
.cta{background:radial-gradient(80% 120% at 50% 0%,rgba(198,169,114,.10),transparent 60%),var(--ink);text-align:center;}
.cta__inner{max-width:60ch;margin-inline:auto;}
.cta__title{font-size:clamp(2.2rem,5vw,4.2rem);font-weight:200;margin-top:.5rem;}
.cta__sub{margin:1.6rem auto 0;max-width:48ch;color:var(--text-soft);font-size:clamp(1rem,1.4vw,1.15rem);}
.cta__actions{margin-top:2.6rem;display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;}

/* Backgrounds */
.bg-2{background:var(--ink-2);}
.bg-grad{background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 100%);}
.bg-grad-rev{background:linear-gradient(180deg,var(--ink-2) 0%,var(--ink) 100%);}

/* Footer */
.footer{background:var(--ink);border-top:1px solid var(--line);padding:clamp(3rem,6vw,4.5rem) 0 3rem;}
.footer__top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2.5rem;padding-bottom:2.5rem;border-bottom:1px solid var(--line);}
.footer__brand{display:flex;align-items:center;gap:.7rem;margin-bottom:1.2rem;}
.footer__desc{color:var(--text-soft);font-size:.95rem;max-width:34ch;}
.footer__coltitle{font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--text-faint);margin-bottom:1.1rem;}
.social{display:flex;gap:.7rem;margin-top:1.6rem;}
.social a{display:grid;place-items:center;width:42px;height:42px;border:1px solid var(--line);border-radius:50%;color:var(--text-soft);transition:transform .35s var(--ease),border-color .35s var(--ease),color .35s var(--ease),background .35s var(--ease);}
.social a:hover{border-color:var(--sand);color:var(--ink);background:var(--sand);transform:translateY(-2px);}
.social svg{width:18px;height:18px;display:block;}
.social a[href="#"]{opacity:.7;}
.social a[href="#"]:hover{opacity:1;}
.footer__col a,.footer__col p{display:block;color:var(--text-soft);font-size:.95rem;margin-bottom:.7rem;transition:color .3s;}
.footer__col a:hover{color:var(--paper);}
.footer__bottom{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:1.8rem;color:var(--text-faint);font-size:.82rem;}

/* Reveal */
[data-reveal]{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease),transform .9s var(--ease);}
[data-reveal].is-in{opacity:1;transform:none;}
.no-motion [data-reveal]{opacity:1;transform:none;}

/* Responsive */
@media (max-width:980px){
  .nav__links,.nav__cta{display:none;}
  .nav__burger{display:flex;}
  /* No backdrop-blur on touch devices — it re-renders every scroll frame and stutters */
  .nav.is-scrolled,.nav.is-solid{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(12,12,14,.94);}
  .btn--ghost{backdrop-filter:none;}
  .cards{grid-template-columns:1fr 1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .process__list{grid-template-columns:1fr 1fr;}
  .gallery{grid-template-columns:1fr 1fr;}
  .footer__top{grid-template-columns:1fr 1fr;}
  /* Mobile content order: TEXT -> IMAGE -> BUTTON (all image+text blocks) */
  .split{display:flex;flex-direction:column;gap:1.6rem;grid-template-areas:none;}
  .split__body{order:1;}
  .split__media{order:2;}
  .split__cta{order:3;margin-top:0;}
  .svc{display:flex;flex-direction:column;gap:1.6rem;}
  .svc__media{order:2;}
  /* portrait photos: taller frames so they aren't cropped/zoomed so hard */
  .svc__media{aspect-ratio:4/5;}
  .split__media{aspect-ratio:4/5;}
  .gallery__item{aspect-ratio:4/5;}
}
@media (max-width:620px){
  .cards,.values,.process__list,.gallery,.form__row,.footer__top{grid-template-columns:1fr;}
  .footer__bottom{flex-direction:column;}
  .intro__hint{display:none;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .intro__layer{animation:none!important;}
  .intro__layer[data-layer="0"]{opacity:1!important;}
  .intro__layer[data-layer="1"],.intro__layer[data-layer="2"]{opacity:0!important;}
  .intro__scene[data-scene="0"]{opacity:1!important;}
  .intro__hint i{animation:none;}
  [data-reveal]{opacity:1!important;transform:none!important;}
}