/* ============================================================
   CASE STUDY — uniwersalny layout dla podstron realizacji
   Wymaga załadowanego wcześniej css/styles.css (zmienne, header, footer, przyciski)
   ============================================================ */

.cs-back{
  display:block;
  padding:110px 0 0;
}
.cs-back .wrap{
  font-family:var(--mono);
  font-size:.8rem;
  letter-spacing:.04em;
}
.cs-back-bottom{
  padding:20px 0;
}
.cs-back a{
  color:var(--paper-70);
  text-decoration:none;
}
.cs-back a:hover{color:var(--spot-teal);}

/* ---------- hero case study ---------- */
.cs-hero{padding:36px 0 60px;}
.cs-hero .eyebrow{margin-bottom:16px;}
.cs-hero h1{
  font-size:clamp(2rem, 6vw, 3.4rem);
  max-width:16ch;
}
.cs-hero .cs-subtitle{
  font-family:var(--mono);
  font-size:.95rem;
  text-transform:uppercase;
  letter-spacing:.04em;
  color:var(--spot-teal);
  margin:10px 0 22px;
}
.cs-hero .lead{
  font-size:1.08rem;
  color:var(--paper-70);
  max-width:62ch;
  margin-bottom:36px;
}

.cs-hero-img{
  width:100%;
  border-radius:var(--radius);
  overflow:hidden;
  position:relative;
  background:linear-gradient(150deg, var(--paper-dim), var(--paper));
  margin-bottom:44px;
}
.cs-hero-img img{width:100%; object-fit:contain; display:block;}
.cs-hero-img .cs-mark{position:absolute; top:16px; right:16px; color:rgba(23,19,15,.45);}

/* ---------- fakty (klient / zakres / objetosc / naklad) ---------- */
.cs-facts{
  display:grid;
  gap:20px;
  grid-template-columns:1fr 1fr;
  padding:28px 0;
  border-top:1px solid rgba(239,232,216,.15);
  border-bottom:1px solid rgba(239,232,216,.15);
}
@media(min-width:700px){
  .cs-facts{grid-template-columns:repeat(4,1fr);}
}
.cs-fact-label{
  font-family:var(--mono);
  font-size:.72rem;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--spot-teal);
  display:block;
  margin-bottom:6px;
}
.cs-fact-value{font-size:.95rem; color:var(--paper);}

/* ---------- sekcje ogolne case study ---------- */
.cs-section{padding:64px 0;}
.cs-section-alt{background:var(--ink-soft);}
.cs-section h2{
  font-size:clamp(1.7rem, 4.5vw, 2.4rem);
  max-width:18ch;
  margin-bottom:22px;
}
.cs-section > .wrap > p{
  font-size:1.02rem;
  color:var(--paper-70);
  max-width:65ch;
}

.cs-support-img{
  margin-top:32px;
  aspect-ratio:2/1;
  border-radius:var(--radius);
  overflow:hidden;
  position:relative;
  background:var(--ink-soft);
}
.cs-support-img img{width:100%; height:100%; object-fit:contain; display:block;}

/* ---------- co zrobilem: siatka ---------- */
.cs-grid{
  display:grid;
  gap:22px;
  margin-top:36px;
}
@media(min-width:700px){
  .cs-grid{grid-template-columns:1fr 1fr;}
}
@media(min-width:1000px){
  .cs-grid{grid-template-columns:repeat(3,1fr);}
}
.cs-grid-item{padding:22px 0; border-top:1px solid rgba(239,232,216,.14);}
.cs-grid-item .cs-tag{
  font-family:var(--mono); font-size:.7rem; text-transform:uppercase; letter-spacing:.08em;
  color:var(--spot-red); margin-bottom:8px; display:block;
}
.cs-grid-item h3{font-size:1.1rem; text-transform:none; letter-spacing:0; color:var(--paper); margin-bottom:.4em;}
.cs-grid-item p{font-size:.92rem; color:var(--paper-70); margin-bottom:0;}

/* ---------- karta zlecenia ---------- */
.cs-spec{
  margin-top:30px;
  display:grid;
  gap:0;
  max-width:640px;
}
.cs-spec-row{
  display:grid;
  grid-template-columns:1fr 1.4fr;
  gap:16px;
  padding:14px 0;
  border-top:1px solid rgba(239,232,216,.14);
  font-size:.92rem;
}
.cs-spec-row:last-child{border-bottom:1px solid rgba(239,232,216,.14);}
.cs-spec-row dt{
  font-family:var(--mono);
  color:var(--spot-teal);
  font-size:.8rem;
  text-transform:uppercase;
  letter-spacing:.03em;
}
.cs-spec-row dd{margin:0; color:var(--paper); }

/* ---------- galeria z wnetrza ---------- */
.cs-gallery-group{margin-top:48px;}
.cs-gallery-group:first-child{margin-top:36px;}
.cs-gallery-label{
  font-family:var(--mono);
  font-size:.82rem;
  color:var(--paper-70);
  margin-bottom:14px;
  text-transform:uppercase;
  letter-spacing:.03em;
}
.cs-gallery-pair{
  display:grid;
  gap:14px;
  grid-template-columns:1fr 1fr;
}
.cs-gallery-pair-tight{
  max-width:460px;
}

/* ---------- galeria: siatka 3 kolumny z wlasnym tytulem ---------- */
.cs-gallery-grid3{
  display:grid;
  gap:28px 20px;
  grid-template-columns:1fr;
  margin-top:36px;
}
@media(min-width:700px){
  .cs-gallery-grid3{grid-template-columns:1fr 1fr;}
}
@media(min-width:1000px){
  .cs-gallery-grid3{grid-template-columns:1fr 1fr 1fr;}
}
.cs-gallery-item{margin:0;}
.cs-gallery-item .cs-gallery-label{margin-bottom:10px;}
.cs-gallery-item .cs-gallery-img{cursor:pointer; transition:opacity .15s;}
.cs-gallery-item .cs-gallery-img:hover{opacity:.85;}

/* ---------- lightbox ---------- */
.lb-overlay{
  position:fixed; inset:0; z-index:100;
  display:none;
  align-items:center; justify-content:center;
  background:rgba(10,8,6,.94);
  padding:20px;
}
.lb-overlay.open{display:flex;}
.lb-img-wrap{
  position:relative;
  max-width:min(92vw, 1100px);
  max-height:88vh;
  display:flex;
  align-items:center;
  justify-content:center;
}
.lb-img-wrap img{
  max-width:100%;
  max-height:88vh;
  object-fit:contain;
  display:block;
  border-radius:var(--radius);
}
.lb-close{
  position:absolute; top:-6px; right:-6px;
  transform:translate(50%,-50%);
  width:40px; height:40px;
  border-radius:50%;
  background:var(--paper);
  color:var(--ink);
  border:none;
  font-size:1.1rem;
  cursor:pointer;
}
.lb-nav{
  position:fixed;
  top:50%; transform:translateY(-50%);
  width:46px; height:46px;
  border-radius:50%;
  background:rgba(239,232,216,.12);
  border:1px solid rgba(239,232,216,.3);
  color:var(--paper);
  font-size:1.3rem;
  cursor:pointer;
}
.lb-nav:hover{background:var(--spot-teal); border-color:var(--spot-teal); color:var(--ink);}
.lb-prev{left:18px;}
.lb-next{right:18px;}
.lb-counter{
  position:fixed;
  bottom:22px; left:50%; transform:translateX(-50%);
  font-family:var(--mono);
  font-size:.8rem;
  color:var(--paper-70);
  letter-spacing:.04em;
}
@media(max-width:640px){
  .lb-nav{width:38px; height:38px; font-size:1.1rem;}
  .lb-prev{left:8px;}
  .lb-next{right:8px;}
}
.cs-gallery-img{
  border-radius:var(--radius);
  overflow:hidden;
  position:relative;
  background:var(--ink-soft);
}
.cs-gallery-img img{width:100%; height:auto; display:block;}
.cs-gallery-img.cs-single{grid-column:1 / -1;}

/* ---------- CTA koncowe case study (reuzywa .cta-final z glownego pliku, tu tylko drobne poprawki) ---------- */
.cs-cta{
  padding:70px 0 90px;
}