/* ELKO - instalacje elektryczne. Paleta z logo: grafit + czerwień + biel. */
:root{
  --czerwony:#c8102e;
  --czerwony-ciemny:#9d0c24;
  --grafit:#2f3237;
  --grafit-jasny:#6b7078;
  --tlo:#ffffff;
  --tlo-alt:#f4f5f7;
  --tlo-ciemne:#14161a;
  --tekst:#1c1f24;
  --muted:#6b7078;
  --linia:#e2e5ea;
  --cien:0 2px 8px rgba(20,22,26,.06), 0 12px 32px rgba(20,22,26,.07);
  --max:1180px;
  --r:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--tlo);color:var(--tekst);
  font:17px/1.65 "Segoe UI",system-ui,Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.15;margin:0 0 .5em;letter-spacing:-.02em}
h1{font-size:clamp(2.1rem,5.2vw,3.6rem);font-weight:800}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:800}
h3{font-size:1.12rem;font-weight:700}
p{margin:0 0 1rem}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.muted{color:var(--muted)}
.small{font-size:.88rem}
.nad{text-transform:uppercase;letter-spacing:.16em;font-size:.76rem;font-weight:700;
  color:var(--czerwony);margin:0 0 .6rem}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:10px 16px;z-index:99;border-radius:8px}

/* --- nagłówek --- */
.top{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--linia)}
.top-in{display:flex;align-items:center;gap:26px;height:94px}
.brand img{height:66px;width:auto}
.brand #brand-txt{font-weight:800;font-size:1.4rem;color:var(--grafit);line-height:1}
.brand #brand-txt small{display:block;font-size:.62rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--grafit-jasny);font-weight:600;margin-top:3px}
.nav{display:flex;gap:24px;margin-left:auto}
.nav a{font-size:.95rem;font-weight:600;color:var(--grafit);padding:6px 0;
  border-bottom:2px solid transparent}
.nav a:hover{color:var(--czerwony);border-color:var(--czerwony)}
.top-akcje{display:flex;align-items:center;gap:10px}

.btn{display:inline-block;padding:13px 24px;border-radius:10px;font-weight:700;font-size:.98rem;
  border:2px solid transparent;cursor:pointer;transition:.15s;text-align:center}
.btn.primary{background:var(--czerwony);color:#fff}
.btn.primary:hover{background:var(--czerwony-ciemny)}
.btn.ghost{border-color:rgba(255,255,255,.6);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.12)}
.btn.tel{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;font-size:.92rem;border-color:var(--linia);color:var(--grafit)}
.btn.tel:hover{border-color:var(--czerwony);color:var(--czerwony)}
/* klasyczna słuchawka, bez emoji */
.btn.tel::before{
  content:"";
  width:15px;height:15px;flex-shrink:0;
  background:currentColor;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M6.6 10.8c1.4 2.8 3.8 5.1 6.6 6.6l2.2-2.2c.3-.3.7-.4 1.1-.2 1.2.4 2.5.6 3.8.6.6 0 1 .4 1 1V20c0 .6-.4 1-1 1C10.6 21 3 13.4 3 4c0-.6.4-1 1-1h3.5c.6 0 1 .4 1 1 0 1.3.2 2.6.6 3.8.1.4 0 .8-.3 1.1L6.6 10.8z' fill='black'/%3E%3C/svg%3E") center/contain no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M6.6 10.8c1.4 2.8 3.8 5.1 6.6 6.6l2.2-2.2c.3-.3.7-.4 1.1-.2 1.2.4 2.5.6 3.8.6.6 0 1 .4 1 1V20c0 .6-.4 1-1 1C10.6 21 3 13.4 3 4c0-.6.4-1 1-1h3.5c.6 0 1 .4 1 1 0 1.3.2 2.6.6 3.8.1.4 0 .8-.3 1.1L6.6 10.8z' fill='black'/%3E%3C/svg%3E") center/contain no-repeat;
}
.btn.login{padding:9px 18px;font-size:.92rem;background:var(--grafit);color:#fff}
.btn.login:hover{background:#000}
.burger{display:none;width:44px;height:40px;border:1px solid var(--linia);background:#fff;
  border-radius:9px;position:relative;cursor:pointer}
.burger span,.burger span::before,.burger span::after{position:absolute;left:11px;width:20px;height:2px;
  background:var(--grafit);content:"";transition:.2s}
.burger span{top:19px}
.burger span::before{top:-6px}
.burger span::after{top:6px}

.nav a.aktywna{color:var(--czerwony);border-color:var(--czerwony)}

/* --- hero z karuzelą --- */
.hero{position:relative;color:#fff;background:var(--tlo-ciemne);overflow:hidden;min-height:560px}
.hero-karuzela{position:absolute;inset:0}
.hero-slajd{position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;transition:opacity 1.1s ease;will-change:opacity;
  background-color:#1b1e22}
.hero-slajd.aktywny{opacity:1}
.hero-cien{position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(15,17,20,.95) 0%,rgba(15,17,20,.8) 46%,rgba(15,17,20,.55) 100%)}
.hero-podpis{position:absolute;right:22px;bottom:96px;font-size:.82rem;color:#c3c8d0;
  background:rgba(10,12,15,.55);border:1px solid rgba(255,255,255,.16);
  padding:6px 12px;border-radius:999px;z-index:3}
.hero-sterowanie{position:absolute;left:0;right:0;bottom:22px;z-index:4;
  display:flex;align-items:center;justify-content:center;gap:12px}
.hero-strzalka{width:38px;height:38px;border-radius:50%;cursor:pointer;
  border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.08);color:#fff;
  font-size:1.3rem;line-height:1;display:grid;place-items:center}
.hero-strzalka:hover{background:var(--czerwony);border-color:var(--czerwony)}
.hero-kropki{display:flex;gap:8px}
.hero-kropka{width:34px;height:5px;border-radius:3px;border:0;cursor:pointer;
  background:rgba(255,255,255,.32)}
.hero-kropka.aktywna{background:var(--czerwony)}
.hero-in{position:relative;z-index:2;padding:104px 22px 108px}
@media (prefers-reduced-motion: reduce){
  .hero-slajd{transition:none}
}

/* --- nagłówek podstrony --- */
.podstrona-hero{background:var(--tlo-alt);border-bottom:1px solid var(--linia);
  padding:64px 0 56px}
.podstrona-hero h1{font-size:clamp(1.9rem,4.2vw,3rem)}
.podstrona-hero .lead{color:var(--muted);font-size:1.1rem;max-width:64ch;margin:0}
.hero .nad{color:#ff8fa1}
.hero .lead{font-size:1.16rem;color:#d8dce3;max-width:60ch}
.cta{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0 44px}
.liczby{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;
  list-style:none;padding:26px 0 0;margin:0;border-top:1px solid rgba(255,255,255,.16)}
.liczby strong{display:block;font-size:1.24rem;color:#fff}
.liczby span{font-size:.9rem;color:#aeb5bf}

/* --- sekcje --- */
.sec{padding:84px 0;border-top:1px solid var(--linia)}
.sec.alt{background:var(--tlo-alt)}
.opis{color:var(--muted);max-width:62ch;margin-bottom:26px}
.grid{display:grid;gap:20px;margin-top:30px}
.g3{grid-template-columns:repeat(auto-fit,minmax(290px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{background:#fff;border:1px solid var(--linia);border-radius:var(--r);padding:28px 26px;
  box-shadow:var(--cien);transition:.18s}
.card:hover{transform:translateY(-3px);border-color:#cfd4dc}
.card .ico{display:block;margin-bottom:14px}
.card .ico img,.kafel .ico img,.karta-duza .ico img,.mini .ico img,.ico-sekcja img{
  width:48px;height:48px;display:block}
.kafel .ico img{width:48px;height:48px}
.karta-duza .ico img{width:52px;height:52px}
.mini .ico img{width:40px;height:40px}
.ico-sekcja img{width:44px;height:44px}
/* na ciemnym tle (wyróżnik) — jaśniejsze linie przez filter */
.karta-duza.wyroznik .ico-jasne img{
  filter:brightness(0) invert(1);opacity:.95}
.sekcja-head{display:flex;align-items:center;gap:16px;margin-bottom:1.4rem}
.sekcja-head h2{margin:0}
.sekcja-head .nad{margin:0 0 .35rem}
.ico-sekcja{
  flex-shrink:0;width:64px;height:64px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--linia);border-radius:14px;
  box-shadow:0 2px 10px rgba(20,22,26,.05)}
.sec.alt .ico-sekcja{background:var(--tlo)}
.mini-ikona .ico{display:block;margin-bottom:12px}
.card p{color:var(--muted);margin:0;font-size:.98rem}
.card.wyroznik{background:var(--grafit);border-color:var(--grafit);color:#fff}
.card.wyroznik p{color:#c3c8d0}
.mini{background:#fff;border:1px solid var(--linia);border-left:4px solid var(--czerwony);
  border-radius:10px;padding:20px 20px}
.mini h3{font-size:1rem;margin-bottom:6px}
.mini p{margin:0;color:var(--muted);font-size:.92rem}

/* --- galeria --- */
.gal{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.gal figure{margin:0;border-radius:var(--r);overflow:hidden;background:var(--tlo-alt);
  border:1px solid var(--linia);position:relative}
.gal img{aspect-ratio:4/3;object-fit:cover;width:100%;transition:.35s}
.gal figure:hover img{transform:scale(1.04)}
.gal figcaption{padding:12px 14px;font-size:.88rem;color:var(--muted);background:#fff}
.gal img[data-brak]{background:repeating-linear-gradient(45deg,#eceef1,#eceef1 12px,#e3e6ea 12px,#e3e6ea 24px)}

/* --- kafle linkujące i karty podstron --- */
.g2{grid-template-columns:repeat(auto-fit,minmax(400px,1fr))}
.kafel{background:#fff;border:1px solid var(--linia);border-radius:var(--r);padding:26px 24px;
  box-shadow:var(--cien);display:block;transition:.18s}
.kafel:hover{transform:translateY(-3px);border-color:var(--czerwony)}
.kafel .ico{
  display:flex;align-items:center;justify-content:center;
  width:64px;height:64px;margin-bottom:16px;
  background:var(--tlo-alt);border:1px solid var(--linia);border-radius:14px}
.kafel p{color:var(--muted);font-size:.96rem;margin-bottom:12px}
.kafel .wiecej{color:var(--czerwony);font-weight:700;font-size:.9rem}
.karta-duza{background:#fff;border:1px solid var(--linia);border-radius:var(--r);
  padding:32px 30px;box-shadow:var(--cien)}
.karta-duza .ico{
  display:flex;align-items:center;justify-content:center;
  width:68px;height:68px;margin-bottom:18px;
  background:var(--tlo-alt);border:1px solid var(--linia);border-radius:16px}
.karta-duza.wyroznik .ico{
  background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.14)}
.karta-duza h2{font-size:1.32rem}
.karta-duza p{color:var(--muted)}
.karta-duza.wyroznik{background:var(--grafit);border-color:var(--grafit);color:#fff}
.karta-duza.wyroznik p{color:#c3c8d0}
.srodek{text-align:center;margin-top:34px}
.btn.linia-ciemna{border-color:var(--grafit);color:var(--grafit)}
.btn.linia-ciemna:hover{background:var(--grafit);color:#fff}
.btn.linia{border-color:rgba(255,255,255,.5);color:#fff}
.btn.linia:hover{background:rgba(255,255,255,.14)}

/* --- kroki współpracy --- */
.kroki{list-style:none;counter-reset:k;padding:0;margin:30px 0 0;display:grid;gap:18px;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.kroki li{background:#fff;border:1px solid var(--linia);border-radius:var(--r);padding:24px;
  position:relative}
.kroki span{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;
  background:var(--czerwony);color:#fff;font-weight:800;margin-bottom:12px}
.kroki p{color:var(--muted);margin:0;font-size:.95rem}

/* --- filtry galerii --- */
.filtry{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.filtr{border:1px solid var(--linia);background:#fff;color:var(--grafit);font:inherit;
  font-size:.9rem;font-weight:600;padding:9px 18px;border-radius:999px;cursor:pointer}
.filtr:hover{border-color:var(--czerwony);color:var(--czerwony)}
.filtr.aktywny{background:var(--czerwony);border-color:var(--czerwony);color:#fff}
.gal figcaption em{display:block;font-style:normal;font-size:.78rem;color:var(--czerwony);
  text-transform:uppercase;letter-spacing:.1em;margin-top:3px}

/* --- pasek CTA nad stopką --- */
.pasek-cta{background:var(--czerwony);color:#fff;padding:44px 0}
.pasek-in{display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap}
.pasek-cta h2{margin:0 0 6px;font-size:1.6rem}
.pasek-cta p{margin:0;color:rgba(255,255,255,.86)}
.pasek-akcje{display:flex;gap:12px;flex-wrap:wrap}
.pasek-cta .btn.primary{background:#fff;color:var(--czerwony)}
.pasek-cta .btn.primary:hover{background:#f2f2f2}

.stopka-in{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.stopka-kol h3{color:#fff;font-size:.86rem;text-transform:uppercase;letter-spacing:.14em;
  margin-bottom:12px}
.stopka-kol nav{display:grid;gap:8px}
.stopka-kol a:hover{color:#fff}
.stopka-dol{border-top:1px solid rgba(255,255,255,.1);margin-top:30px;padding-top:18px}
.kontakt-lista.ciemne span{color:var(--muted)}
.kontakt-lista.ciemne a{color:var(--tekst)}
.kontakt-lista.ciemne a:hover{color:var(--czerwony)}

@media(max-width:820px){
  .stopka-in{grid-template-columns:1fr}
  .g2{grid-template-columns:1fr}
}

/* --- przeglądarka zdjęć --- */
.lb{position:fixed;inset:0;z-index:60;background:rgba(6,7,9,.985);backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;padding:56px 18px}
.lb[hidden]{display:none}
.lb-scena{margin:0;max-width:1200px;width:100%;display:grid;gap:14px;justify-items:center}
.lb-scena img{max-height:80vh;width:auto;border-radius:8px;
  box-shadow:0 24px 60px rgba(0,0,0,.6);transition:filter .15s}
.lb.wczytuje .lb-scena img{filter:blur(6px)}
.lb-scena figcaption{color:#d8dce3;font-size:.95rem;text-align:center;display:grid;gap:4px}
.lb-scena figcaption em{color:#8b929c;font-style:normal;font-size:.85rem}
.lb-x{position:absolute;top:16px;right:18px;width:46px;height:46px;border-radius:50%;
  border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.08);color:#fff;
  font-size:1.1rem;cursor:pointer}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:54px;height:54px;
  border-radius:50%;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.08);
  color:#fff;font-size:2rem;line-height:1;cursor:pointer}
.lb-x:hover,.lb-nav:hover{background:var(--czerwony);border-color:var(--czerwony)}
.lb-prev{left:18px}
.lb-next{right:18px}
@media(max-width:700px){
  .lb-nav{width:44px;height:44px;font-size:1.6rem}
  .lb-prev{left:8px}
  .lb-next{right:8px}
}

/* --- dwie kolumny --- */
.dwie{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:start}
.ptaki{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:10px}
.ptaki li{padding-left:30px;position:relative;color:var(--tekst)}
.ptaki li::before{content:"✓";position:absolute;left:0;top:0;color:var(--czerwony);font-weight:800}
.foto-box{aspect-ratio:4/3;width:100%;object-fit:cover;border-radius:var(--r);
  border:1px solid var(--linia);box-shadow:var(--cien);background:#fff}
.foto-box.pusta{background:repeating-linear-gradient(35deg,#f0f2f4,#f0f2f4 18px,#e7eaee 18px,#e7eaee 36px)}
.ptaki+p,.ptaki+p .btn{margin-top:26px}

/* --- formularz --- */
.kontakt-sec{background:var(--tlo-ciemne);color:#fff;border-top:none}
.kontakt-sec .nad{color:#ff8fa1}
.kontakt-sec p{color:#c3c8d0}
.kontakt-lista{list-style:none;padding:0;margin:24px 0;display:grid;gap:16px}
.kontakt-lista li{display:grid;grid-template-columns:40px 1fr;grid-template-rows:auto auto;
  column-gap:12px;row-gap:2px;align-items:center}
.kontakt-lista .kontakt-ico{
  grid-row:1 / span 2;width:40px;height:40px;display:flex;align-items:center;justify-content:center;
  background:var(--tlo-alt);border:1px solid var(--linia);border-radius:10px}
.kontakt-lista .kontakt-ico img{width:24px;height:24px}
.kontakt-lista span:not(.kontakt-ico){font-size:.78rem;text-transform:uppercase;letter-spacing:.14em;color:#8b929c}
.kontakt-lista a{font-size:1.25rem;font-weight:700;color:#fff}
.kontakt-lista a:hover{color:#ff8fa1}
.kontakt-lista.ciemne .kontakt-ico{background:#fff}
.form{background:#fff;color:var(--tekst);border-radius:var(--r);padding:28px;box-shadow:var(--cien)}
.pola{display:grid;grid-template-columns:1fr 1fr;gap:14px}
label{display:grid;gap:6px;font-size:.86rem;font-weight:600;color:var(--grafit);margin-bottom:14px}
input,select,textarea{font:inherit;padding:12px 14px;border:1px solid var(--linia);border-radius:9px;
  background:#fff;color:var(--tekst);width:100%;font-weight:400}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--czerwony);
  box-shadow:0 0 0 3px rgba(200,16,46,.12)}
.zgoda{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:.85rem;color:var(--muted)}
.zgoda input{width:auto;margin-top:3px}
.hp{position:absolute;left:-9999px;opacity:0;height:0}
.form .btn{width:100%}
.status{margin:14px 0 0;font-size:.92rem;min-height:1.2em}
.status.ok{color:#0a7d33}
.status.err{color:var(--czerwony)}

/* --- stopka --- */
.stopka{background:#0b0d10;color:#9aa1ab;padding:44px 0}
.stopka-in{display:grid;gap:18px}
.f-brand{font-weight:800;color:#fff;font-size:1.2rem;margin:0}
.f-brand span{font-weight:400;color:#9aa1ab;font-size:.9rem}
.stopka nav{display:flex;gap:20px;flex-wrap:wrap}
.stopka nav a{font-size:.92rem}
.stopka nav a:hover{color:#fff}

@media(max-width:900px){
  .dwie{grid-template-columns:1fr;gap:32px}
  .pola{grid-template-columns:1fr}
}
@media(max-width:760px){
  .burger{display:block}
  .nav{position:fixed;inset:78px 0 auto 0;background:#fff;flex-direction:column;gap:0;
    padding:8px 22px 20px;border-bottom:1px solid var(--linia);display:none}
  .nav.otwarte{display:flex}
  .nav a{padding:14px 0;border-bottom:1px solid var(--linia)}
  .btn.tel{display:none}
  .hero-in{padding:72px 22px 64px}
  .sec{padding:60px 0}
}

/* ——— sekcja Współpraca ——— */
.loga{list-style:none;margin:0 0 34px;padding:0;display:grid;gap:22px;
  grid-template-columns:repeat(auto-fill,minmax(160px,1fr));align-items:center}
.loga li{display:grid;gap:8px;justify-items:center;text-align:center}
.loga img{max-width:100%;max-height:70px;width:auto;height:auto;object-fit:contain;
  filter:grayscale(100%);opacity:.75;transition:filter .2s,opacity .2s}
.loga li:hover img{filter:none;opacity:1}
.loga span{font-size:.82rem;color:var(--muted)}
.podtytul{font-size:1.15rem;margin:0 0 16px}
.gal.certyfikaty{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
.gal.certyfikaty img{aspect-ratio:3/4;object-fit:cover}
.pusto-strona{color:var(--muted);padding:30px 0}