/* ════════════════════════════════════════════════════════════
   Arca Solar — wspólne style dla case studies (realizacje/*.html)
   ════════════════════════════════════════════════════════════ */
:root {
  --g:#32B46B; --gd:#1e8a4e; --gl:#4ed68a;
  --gxl:rgba(50,180,107,.10); --gb:rgba(50,180,107,.22);
  --am:#F5A623; --amxl:rgba(245,166,35,.10); --amb:rgba(245,166,35,.25);
  --bg:#1b2720; --bgnav:#121d14; --bgs1:#212d24; --bgs2:#192320;
  --bgc:#253028;
  --th:#fff; --tb:#cce5d8; --tm:#92b8a5; --td:#6e9480;
  --brd:rgba(50,180,107,.12);
  --r:5px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{
  background:var(--bg);
  color:var(--tb);
  font-family:'Inter',sans-serif;
  line-height:1.6;
  font-size:15.5px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--g);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.C{max-width:1180px;margin:0 auto;padding:0 1.5rem}

/* Nav */
.nav{background:var(--bgnav);border-bottom:1px solid var(--brd);padding:.85rem 0;position:sticky;top:0;z-index:100}
.navflex{display:flex;align-items:center;justify-content:space-between;gap:1.25rem;flex-wrap:wrap}
.nav .logo{height:31px;width:auto}
.nav-links{display:flex;gap:1.5rem;font-size:13.5px}
.nav-links a{color:var(--tb);font-weight:500}
.nav-links a:hover{color:var(--g);text-decoration:none}
.nav-cta{background:var(--g);color:#fff;padding:.5rem 1.05rem;border-radius:5px;font-weight:700;font-size:13px}
.nav-cta:hover{background:var(--gd);text-decoration:none}

/* Hero */
.cs-hero{background:var(--bgs2);padding:3rem 0 2.5rem;border-bottom:1px solid var(--brd)}
.crumb{font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.18em;color:var(--g);text-transform:uppercase;margin-bottom:.85rem}
.crumb a{color:var(--g)}
.cs-hero h1{font-family:'Sora',sans-serif;font-size:clamp(28px,4vw,46px);font-weight:800;color:var(--th);line-height:1.05;margin-bottom:.85rem;letter-spacing:-.01em}
.cs-hero .lead{font-size:16px;color:var(--tm);max-width:780px;line-height:1.7}
.cs-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1.25rem;margin-top:2rem}
.cs-mi{padding:.85rem 1rem;background:var(--bgc);border:1px solid var(--brd);border-radius:6px}
.cs-mi-l{font-family:'DM Mono',monospace;font-size:10px;color:var(--td);letter-spacing:.18em;text-transform:uppercase;margin-bottom:.3rem}
.cs-mi-v{font-family:'Sora',sans-serif;font-size:18px;font-weight:700;color:var(--th)}

/* Image */
.cs-img{margin:2.5rem 0 0;border-radius:6px;overflow:hidden;box-shadow:0 8px 40px rgba(0,0,0,.36)}

/* Sections */
.cs-body{padding:3.5rem 0 5rem;max-width:880px;margin:0 auto}
.cs-body h2{font-family:'Sora',sans-serif;font-size:22px;font-weight:800;color:var(--th);margin:2.5rem 0 1rem;padding:.6rem 0;border-left:4px solid var(--g);padding-left:1rem}
.cs-body h3{font-family:'Sora',sans-serif;font-size:17px;font-weight:700;color:var(--tb);margin:1.5rem 0 .65rem}
.cs-body p{margin-bottom:1rem;color:var(--tm);font-weight:300;line-height:1.78}
.cs-body strong{color:var(--tb);font-weight:600}
.cs-body ul,.cs-body ol{padding-left:1.5rem;margin-bottom:1rem}
.cs-body li{color:var(--tm);font-weight:300;margin-bottom:.4rem;line-height:1.7}

.spec{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1.5rem 0;background:var(--bgs1);padding:1.5rem;border-radius:8px;border:1px solid var(--brd)}
.spec-row{display:flex;flex-direction:column}
.spec-l{font-family:'DM Mono',monospace;font-size:10.5px;color:var(--td);letter-spacing:.15em;text-transform:uppercase;margin-bottom:.25rem}
.spec-v{font-family:'Sora',sans-serif;font-size:15px;color:var(--th);font-weight:600}

/* Phase timeline */
.tl{margin:1.5rem 0;border-left:2px solid var(--g);padding-left:1.5rem}
.tl-item{padding-bottom:1.25rem;position:relative}
.tl-item::before{content:'';position:absolute;left:-1.65rem;top:.4rem;width:8px;height:8px;background:var(--g);border-radius:50%;border:3px solid var(--bg);box-shadow:0 0 0 1px var(--g)}
.tl-d{font-family:'DM Mono',monospace;font-size:11px;color:var(--g);letter-spacing:.05em;margin-bottom:.2rem}
.tl-t{font-family:'Sora',sans-serif;font-size:15px;font-weight:700;color:var(--th);margin-bottom:.3rem}
.tl-x{font-size:13.5px;color:var(--tm);line-height:1.65}

/* CTA */
.cs-cta{background:linear-gradient(135deg,var(--g),var(--gd));padding:3rem 2rem;border-radius:8px;text-align:center;margin:3rem 0 0;color:#fff}
.cs-cta h3{font-family:'Sora',sans-serif;font-size:22px;font-weight:800;color:#fff;margin-bottom:.6rem}
.cs-cta p{color:rgba(255,255,255,.85);margin-bottom:1.5rem;font-size:15px}
.cs-cta .btn{display:inline-block;background:#fff;color:var(--gd);padding:.85rem 1.85rem;border-radius:5px;font-weight:700;font-family:'Sora',sans-serif;font-size:14px;letter-spacing:.02em}
.cs-cta .btn:hover{transform:translateY(-1px);text-decoration:none}

/* Footer */
.foot{background:var(--bgnav);border-top:1px solid var(--brd);padding:2.5rem 0;text-align:center;color:var(--tm);font-size:13px}
.foot a{color:var(--g)}

/* Mobile */
@media (max-width:640px){
  .nav-links{gap:.85rem;font-size:12.5px}
  .cs-meta{grid-template-columns:1fr 1fr}
  .spec{grid-template-columns:1fr}
}