*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:5.5rem}
body{
  margin:0;background:var(--paper);color:var(--fg);
  font-family:var(--font-text);font-size:var(--step-0);line-height:1.62;
  font-weight:350;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body.is-locked{overflow:hidden}
img,video,svg,canvas{display:block;max-width:100%}
h1,h2,h3{margin:0;font-weight:400;text-wrap:balance}
h2,h3{font-family:var(--font-display);letter-spacing:-.015em;line-height:1.02}
p{margin:0 0 1em;max-width:var(--measure)}
a{color:inherit}
em{font-style:italic}
::selection{background:var(--ochre);color:var(--night)}
:focus-visible{outline:2px solid var(--clay);outline-offset:4px}
.section-ink :focus-visible,.hero :focus-visible,.site-footer :focus-visible{outline-color:var(--ochre-lift)}
.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}
.skip{position:fixed;left:1rem;top:-100px;z-index:200;background:var(--night);color:var(--paper);padding:.8rem 1.1rem;font-size:var(--step--1);letter-spacing:.06em;text-transform:uppercase;text-decoration:none;transition:top .2s var(--ease)}
.skip:focus{top:1rem}

/* ---------- header ---------- */
.site-header{
  position:fixed;inset:0 0 auto;z-index:100;
  display:flex;align-items:center;gap:clamp(1rem,3vw,2.5rem);
  padding:clamp(1rem,2.2vw,1.6rem) var(--gutter);
  color:var(--paper);
  transition:background .45s var(--ease),color .45s var(--ease),padding .45s var(--ease),box-shadow .45s var(--ease);
}
.site-header::after{
  content:"";position:absolute;inset:auto var(--gutter) 0;height:1px;
  background:currentColor;opacity:0;transition:opacity .45s var(--ease);
}
.site-header.is-solid{
  background:color-mix(in srgb,var(--paper) 92%,transparent);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);backdrop-filter:blur(14px) saturate(1.2);
  color:var(--ink);padding-block:.85rem;
}
.site-header.is-solid::after{opacity:.16}
.brand{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;font-family:var(--font-display);font-size:1.32rem;letter-spacing:.01em;line-height:1}
.brand-mark{width:1.15em;height:1.15em;flex:none}
.nav{margin-left:auto}
.nav ul{display:flex;gap:clamp(1rem,2vw,2rem);list-style:none;margin:0;padding:0}
.nav a{
  position:relative;text-decoration:none;font-size:var(--step--1);
  letter-spacing:.1em;text-transform:uppercase;padding-block:.35rem;
}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:currentColor;
  transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease-out);
}
.nav a:hover::after,.nav a:focus-visible::after,.nav a[aria-current="true"]::after{transform:scaleX(1)}
.header-cta{
  text-decoration:none;font-size:var(--step--1);letter-spacing:.09em;text-transform:uppercase;
  border:1px solid currentColor;border-radius:999px;padding:.55rem 1.05rem;
  transition:background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}
.header-cta:hover{background:var(--ochre);border-color:var(--ochre);color:var(--night)}
.nav-toggle{
  display:none;margin-left:auto;width:2.75rem;height:2.75rem;flex:none;
  background:none;border:1px solid currentColor;border-radius:999px;color:inherit;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle-bars,.nav-toggle-bars::before,.nav-toggle-bars::after{
  display:block;width:1.05rem;height:1px;background:currentColor;transition:transform .35s var(--ease),opacity .2s linear;
}
.nav-toggle-bars{position:relative}
.nav-toggle-bars::before,.nav-toggle-bars::after{content:"";position:absolute;left:0}
.nav-toggle-bars::before{top:-.32rem}
.nav-toggle-bars::after{top:.32rem}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(.32rem) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-.32rem) rotate(-45deg)}

@media (max-width:860px){
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}
  .nav{
    position:fixed;inset:0;margin:0;z-index:-1;
    background:var(--night);color:var(--paper);
    display:grid;place-content:center;padding:6rem var(--gutter) 3rem;
    opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s;
  }
  .nav[data-open="true"]{opacity:1;visibility:visible}
  .nav ul{flex-direction:column;gap:.4rem;text-align:left}
  .nav::after{
    content:"Zapytaj o wycenę →";display:block;margin-top:2rem;
    font-size:var(--step--1);letter-spacing:.14em;text-transform:uppercase;
    color:var(--ochre-lift);
  }
  .nav a{font-family:var(--font-display);font-size:clamp(2rem,9vw,3rem);text-transform:none;letter-spacing:0;line-height:1.15;display:block;padding-block:.25rem}
  .site-header:has(.nav[data-open="true"]){color:var(--paper);background:none;-webkit-backdrop-filter:none;backdrop-filter:none;box-shadow:none}
  .site-header:has(.nav[data-open="true"])::after{opacity:0}
}


/* ---------- hero ---------- */
.hero-wrap{position:relative}
.hero{
  position:relative;min-height:100svh;display:flex;align-items:flex-end;
  padding:clamp(6rem,12vh,9rem) var(--gutter) clamp(3rem,7vh,5rem);
  background:var(--night);color:var(--paper);overflow:hidden;
  isolation:isolate;
}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:-2}
.hero[data-webgl="off"] .hero-canvas{display:none}
.hero[data-webgl="off"]{
  background:var(--night) url("../assets/poster-hero-desktop.jpg") center/cover no-repeat;
}
@media (max-width:720px){
  .hero[data-webgl="off"]{background-image:url("../assets/poster-hero-mobile.jpg")}
}
.hero-scrim{
  position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    linear-gradient(to top,color-mix(in srgb,var(--night) 88%,transparent) 0%,color-mix(in srgb,var(--night) 55%,transparent) 42%,transparent 78%),
    linear-gradient(to right,color-mix(in srgb,var(--night) 72%,transparent) 0%,transparent 62%);
}
.hero-inner{position:relative;max-width:min(46rem,100%)}
.eyebrow{
  display:flex;align-items:center;gap:.85rem;margin:0 0 1.5rem;
  font-size:var(--step--1);letter-spacing:.2em;text-transform:uppercase;color:var(--paper-2);opacity:.82;
}
.eyebrow-rule{width:2.4rem;height:1px;background:currentColor;opacity:.6;flex:none}
.hero h1{
  font-family:var(--font-display);font-size:clamp(2.9rem,8.4vw,6.6rem);
  line-height:.96;letter-spacing:-.02em;margin:0 0 1.6rem;
  text-shadow:0 1px 30px color-mix(in srgb,var(--night) 55%,transparent);
}
.hero h1 em{color:var(--ochre-lift)}
.hero-lead{font-size:var(--step-1);line-height:1.5;color:color-mix(in srgb,var(--paper) 84%,transparent);max-width:34ch;margin-bottom:2.2rem;font-weight:300}
.hero-actions{display:flex;flex-wrap:wrap;gap:.75rem}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.6rem;
  font-size:var(--step--1);letter-spacing:.1em;text-transform:uppercase;text-decoration:none;
  padding:.95rem 1.6rem;border-radius:999px;border:1px solid transparent;cursor:pointer;
  transition:background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease-out);
  font-family:var(--font-text);
}
.btn-solid{background:var(--ochre);color:var(--night);border-color:var(--ochre)}
.btn-solid:hover{background:var(--paper);border-color:var(--paper);transform:translateY(-2px)}
.btn-ghost{border-color:color-mix(in srgb,var(--paper) 34%,transparent);color:var(--paper)}
.btn-ghost:hover{border-color:var(--paper);background:color-mix(in srgb,var(--paper) 10%,transparent);transform:translateY(-2px)}
.section-paper .btn-solid,.section-stone .btn-solid{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.section-paper .btn-solid:hover{background:var(--night);border-color:var(--night)}
.scroll-cue{
  position:absolute;right:var(--gutter);bottom:clamp(1.6rem,5vh,2.6rem);
  display:none;align-items:center;gap:.75rem;
  font-size:.68rem;letter-spacing:.24em;text-transform:uppercase;color:color-mix(in srgb,var(--paper) 66%,transparent);
}
.scroll-cue-line{width:3.5rem;height:1px;background:currentColor;position:relative;overflow:hidden}
.scroll-cue-line::after{content:"";position:absolute;inset:0;background:var(--ochre);transform:translateX(-100%);animation:cue 2.6s var(--ease) infinite}
@keyframes cue{0%{transform:translateX(-100%)}55%,100%{transform:translateX(100%)}}
@media (min-width:900px){.scroll-cue{display:flex}}

/* ---------- layout ---------- */
.page{position:relative;z-index:1}
.wrap{width:100%;max-width:84rem;margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:var(--section-y);position:relative}
.section-paper{background:var(--paper);color:var(--ink)}
.section-stone{background:var(--stone);color:var(--ink)}
.section-ink{background:var(--night);color:var(--paper)}
.grid-12{display:grid;grid-template-columns:1fr;gap:clamp(1.6rem,4vw,3.5rem)}
.col-label .label{margin:0}
.label{
  font-size:var(--step--1);letter-spacing:.2em;text-transform:uppercase;color:var(--clay);
  display:flex;align-items:center;gap:.8rem;
}
.label::before{content:"";width:1.9rem;height:1px;background:currentColor;opacity:.55;flex:none}
.label-light{color:var(--ochre-lift)}
.display{font-size:var(--step-3);line-height:1.02;margin-bottom:1.6rem}
.display em{color:var(--clay)}
.section-ink .display em{color:var(--ochre-lift)}
.prose p{font-size:var(--step-0);line-height:1.72;color:color-mix(in srgb,var(--ink) 82%,transparent)}
.prose p:last-child{margin-bottom:0}
.section-note{font-size:var(--step-0);color:var(--muted);max-width:48ch;margin-bottom:clamp(1.6rem,3vw,2.4rem)}
@media (min-width:900px){
  .grid-12{grid-template-columns:minmax(8rem,15%) minmax(0,1fr);gap:clamp(2rem,5vw,5rem)}
  .col-label{position:sticky;top:7rem;align-self:start}
  .col-label .label{flex-direction:column;align-items:flex-start;gap:.7rem}
  .col-label .label::before{width:1px;height:2.6rem}
}
.scope-list{
  list-style:none;margin:2.4rem 0 0;padding:0;
  display:grid;gap:0;border-top:1px solid var(--line);
}
.scope-list li{
  padding:1rem 0 1rem 2.2rem;position:relative;border-bottom:1px solid var(--line);
  font-size:var(--step-0);
}
.scope-list li::before{
  content:"";position:absolute;left:.15rem;top:1.55rem;width:.5rem;height:.5rem;
  border:1px solid var(--clay);transform:rotate(45deg);
}
@media (min-width:640px){.scope-list{grid-template-columns:1fr 1fr;column-gap:2.5rem}}

/* ---------- studies ---------- */
.section-head{max-width:52rem;margin-bottom:clamp(2.4rem,5vw,4rem)}
.studies{display:grid;grid-template-columns:1fr;gap:clamp(2rem,4vw,3.2rem)}
@media (min-width:820px){.studies{grid-template-columns:1fr 1fr;gap:clamp(1.8rem,3vw,2.8rem)}}
.study{display:flex;flex-direction:column;gap:1.4rem}
.study-wide{grid-column:1/-1}
.study-wide .study-body{display:grid;gap:0 clamp(1.5rem,4vw,3.5rem);grid-template-columns:1fr}
@media (min-width:820px){
  .study-wide .study-body{grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);align-items:start}
  .study-wide .study-body p{margin-bottom:0}
  .study-wide .study-meta{grid-column:1/-1;margin-top:1rem}
}
.study-media{
  position:relative;overflow:hidden;border-radius:var(--radius);
  background:#B9AE9C;aspect-ratio:4/3;
}
.study-wide .study-media{aspect-ratio:16/9}
.study:not(.study-wide) .study-media{aspect-ratio:4/5}
.study-canvas{width:100%;height:100%;object-fit:cover;transition:transform 1.1s var(--ease-out)}
.study:hover .study-canvas{transform:scale(1.03)}
/* graceful fallback if WebGL is unavailable: layered architectural gradients */
.study-media[data-webgl="off"]{background:
  linear-gradient(168deg,#D8CDBC 0%,#B7A996 46%,#6E5F4F 100%);}
.study-media[data-webgl="off"]::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(96deg,transparent 46%,rgba(20,18,15,.18) 46.4%,rgba(20,18,15,.18) 47%,transparent 47.4%),
    radial-gradient(70% 55% at 72% 24%,rgba(255,244,222,.9) 0%,transparent 62%);
  mix-blend-mode:screen;opacity:.9;
}
.study-tag{
  position:absolute;left:.9rem;top:.9rem;
  font-size:.64rem;letter-spacing:.16em;text-transform:uppercase;
  padding:.35rem .6rem;border-radius:999px;
  background:color-mix(in srgb,var(--night) 62%,transparent);color:var(--paper);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.study-body h3{font-size:var(--step-2);margin-bottom:.7rem}
.study-body p{font-size:var(--step-0);color:color-mix(in srgb,var(--ink) 80%,transparent);margin-bottom:.9rem}
.study-meta{font-size:var(--step--1);letter-spacing:.06em;color:var(--muted);text-transform:none}

/* ---------- steps ---------- */
.steps{list-style:none;margin:2.6rem 0 0;padding:0;display:grid;gap:0}
.steps li{
  display:grid;grid-template-columns:auto 1fr;gap:1.1rem;
  padding:clamp(1.2rem,2.6vw,1.9rem) 0;
  border-top:1px solid color-mix(in srgb,var(--paper) 16%,transparent);
}
.steps li:last-child{border-bottom:1px solid color-mix(in srgb,var(--paper) 16%,transparent)}
.step-num{
  font-family:var(--font-display);font-size:var(--step--1);
  color:var(--ochre-lift);letter-spacing:.08em;padding-top:.35rem;min-width:2.2rem;
}
.steps h3{font-size:var(--step-1);margin-bottom:.35rem;color:var(--paper)}
.steps p{margin:0;font-size:var(--step-0);color:color-mix(in srgb,var(--paper) 72%,transparent);max-width:46ch}
@media (min-width:820px){.steps li{grid-template-columns:6rem 1fr}}

/* ---------- contact ---------- */
.contact-form{margin-top:2rem;display:grid;gap:1.1rem clamp(1rem,3vw,1.8rem);grid-template-columns:1fr}
@media (min-width:640px){.contact-form{grid-template-columns:1fr 1fr}}
.field{display:flex;flex-direction:column;gap:.45rem}
.field-full{grid-column:1/-1}
.field label{font-size:var(--step--1);letter-spacing:.13em;text-transform:uppercase;color:var(--clay)}
input,textarea{
  font:inherit;font-size:var(--step-0);color:var(--ink);
  background:transparent;border:0;border-bottom:1px solid color-mix(in srgb,var(--ink) 30%,transparent);
  padding:.65rem .1rem;border-radius:0;width:100%;
  transition:border-color .3s var(--ease);
}
input:hover,textarea:hover{border-color:color-mix(in srgb,var(--ink) 55%,transparent)}
input:focus,textarea:focus{outline:none;border-color:var(--clay);box-shadow:0 1px 0 0 var(--clay)}
textarea{resize:vertical;min-height:6rem}
input:user-invalid,textarea:user-invalid{border-color:#A33A2A}
.form-actions{flex-direction:row;flex-wrap:wrap;align-items:center;gap:1rem 1.4rem;margin-top:.6rem}
.form-status{font-size:var(--step--1);color:var(--clay);margin:0;min-height:1.2em}
.form-note{font-size:var(--step--1);color:var(--muted);margin-top:1.6rem;max-width:56ch}
.form-note a{text-decoration-color:color-mix(in srgb,var(--clay) 60%,transparent)}

/* ---------- footer ---------- */
.site-footer{
  background:var(--night);color:color-mix(in srgb,var(--paper) 70%,transparent);
  padding-block:clamp(2.6rem,5vw,4rem) clamp(2rem,4vw,3rem);
}
.footer-grid{display:grid;gap:2rem;grid-template-columns:1fr;align-items:start}
@media (min-width:720px){.footer-grid{grid-template-columns:minmax(0,1fr) auto;gap:3rem}}
.brand-footer{color:var(--paper);margin-bottom:1rem}
.footer-note{font-size:var(--step--1);max-width:46ch;line-height:1.65;margin:0}
.footer-meta{font-size:var(--step--1);letter-spacing:.05em}
.footer-meta p{margin:0 0 .3rem}
@media (min-width:900px){.footer-meta{text-align:right}}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease-out),transform .9s var(--ease-out)}
.reveal.is-in{opacity:1;transform:none}
.hero-inner .reveal{transition-delay:.1s}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  .study:hover .study-canvas{transform:none}
  .btn:hover{transform:none}
}

/* ---------- depth between sections: stacked plates ---------- */
/* Each section lifts over the one before it: a hairline of the lighter
   material, a soft shadow underneath, and a top edge that catches light.
   Reads as physical layers without a single image. */
.section{
  --plate-r:clamp(1.2rem,3.4vw,2.2rem);
  margin-top:calc(var(--plate-r) * -1);
  border-top-left-radius:var(--plate-r);
  border-top-right-radius:var(--plate-r);
  box-shadow:0 -1px 0 color-mix(in srgb,var(--paper) 14%,transparent),
             0 -14px 44px -18px rgba(11,10,9,.55);
  isolation:isolate;
}
.section-paper{margin-top:0;border-radius:0;box-shadow:none}
.section-stone,.section-ink,.section-paper:not(:first-of-type){position:relative}
.section-stone::before,.section-ink::before,.section-paper:not(:first-of-type)::before{
  content:"";position:absolute;left:50%;top:0;transform:translateX(-50%);
  width:min(22%,12rem);height:2px;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--ochre),transparent);
  opacity:.75;
}
.section-ink::before{background:linear-gradient(90deg,transparent,var(--ochre-lift),transparent);opacity:.9}
.site-footer{margin-top:calc(var(--plate-r,2rem) * -1)}

/* hero content eases back as the first plate rises: depth, not decoration */
.hero-inner{will-change:transform,opacity}
.hero{--hprogress:0}
.scroll-cue{transition:opacity .4s var(--ease)}
@media (max-width:899px){
  .section{box-shadow:0 -10px 30px -16px rgba(11,10,9,.5)}
}

/* tap targets: keep the brand and small links comfortably tappable on phones */
.brand{padding-block:.35rem}
@media (max-width:860px){
  .brand{padding-block:.6rem}
  .nav-toggle{width:2.9rem;height:2.9rem}
  .form-note a{display:inline-block;padding-block:.25rem}
}

/* ---------- depth band: a full-bleed 3D crossing between sections ---------- */
.depth-band{
  position:relative;height:clamp(24rem,78vh,46rem);
  display:flex;align-items:center;
  background:var(--night);color:var(--paper);overflow:hidden;
  isolation:isolate;
}
.band-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:-2}
.depth-band[data-webgl="off"] .band-canvas{display:none}
.depth-band[data-webgl="off"]{background:var(--night) url("../assets/poster-band.jpg") center/cover no-repeat;}
.band-scrim{
  position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(90deg,color-mix(in srgb,var(--night) 86%,transparent) 0%,color-mix(in srgb,var(--night) 40%,transparent) 52%,transparent 78%);
}
.band-inner{position:relative;width:100%;max-width:84rem;margin-inline:auto;padding-inline:var(--gutter)}
.band-inner .label{margin-bottom:1.4rem}
.band-inner .display{font-size:clamp(1.9rem,1.2rem + 3.2vw,3.4rem);margin-bottom:1.2rem;color:var(--paper)}
.band-inner .display em{color:var(--ochre-lift)}
.band-note{max-width:38ch;font-size:var(--step-0);color:color-mix(in srgb,var(--paper) 74%,transparent);margin:0}
@media (max-width:720px){
  .depth-band{height:clamp(26rem,88vh,34rem);align-items:flex-end;padding-bottom:clamp(2rem,7vw,3.5rem)}
  .band-scrim{background:linear-gradient(0deg,color-mix(in srgb,var(--night) 92%,transparent) 0%,color-mix(in srgb,var(--night) 55%,transparent) 55%,transparent 88%)}
  .band-note{max-width:100%}
}

/* honest label in the hero, out of the way of controls */
.hero-note{
  margin:1.9rem 0 0;font-size:var(--step--1);letter-spacing:.03em;
  color:color-mix(in srgb,var(--paper) 62%,transparent);max-width:40ch;
}