/* DOM PROJEKT — style.css (2026-09) */
:root{
  --ink:#15181d; --ink-2:#262b33; --muted:#5b616a; --line:#dfdcd5; --line-2:#ebe8e2;
  --bg:#f4f3f0; --paper:#ffffff; --concrete:#e9e7e2;
  --accent:#e05a14; --accent-ink:#a8410a; --accent-soft:#fdeee4;
  --ok:#1f7a4d; --err:#b42318;
  --r:10px; --r-lg:16px; --shadow:0 1px 2px rgba(20,24,29,.06),0 8px 24px rgba(20,24,29,.06);
  --wrap:1180px; --gut:clamp(16px,4vw,32px);
  --font:"Inter","Segoe UI",Roboto,"Helvetica Neue",Arial,system-ui,sans-serif;
  --mono:ui-monospace,"SFMono-Regular","Cascadia Mono",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);font-size:17px;line-height:1.6;color:var(--ink);background:var(--bg)}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent-ink);text-underline-offset:3px}
a:hover{color:var(--accent)}
h1,h2,h3,h4{line-height:1.15;letter-spacing:-.015em;margin:0 0 .5em;font-weight:800;text-wrap:balance}
h1{font-size:clamp(2rem,4.6vw,3.35rem)}
h2{font-size:clamp(1.6rem,3vw,2.3rem)}
h3{font-size:1.2rem;letter-spacing:-.005em}
p{margin:0 0 1em} ul,ol{margin:0 0 1em;padding-left:1.25em} li{margin:.25em 0}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--gut)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:6px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.eyebrow{font-family:var(--mono);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-ink);font-weight:600;margin-bottom:.8em;display:block}
.lead{font-size:1.15rem;color:var(--ink-2);max-width:62ch}
.muted{color:var(--muted)} .small{font-size:.9rem}
.center{text-align:center}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.5em;padding:.8em 1.3em;border-radius:999px;border:2px solid transparent;font-weight:700;font-size:1rem;text-decoration:none;cursor:pointer;font-family:inherit;line-height:1.2;transition:background .15s,color .15s,border-color .15s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-ink);color:#fff}
.btn-ghost{border-color:currentColor;color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-light{background:#fff;color:var(--ink)} .btn-light:hover{background:var(--accent-soft);color:var(--ink)}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:1.4em}

/* header */
.site-header{position:sticky;top:0;z-index:40;background:rgba(244,243,240,.92);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.hdr{display:flex;align-items:center;gap:16px;min-height:68px;max-width:1340px}
.nav .only-m{display:none}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:900;letter-spacing:.04em;font-size:1.05rem;white-space:nowrap}
.logo svg{width:34px;height:34px;flex:none}
.logo small{display:block;font-family:var(--mono);font-weight:500;font-size:.62rem;letter-spacing:.14em;color:var(--muted)}
.nav{margin-left:auto}
.nav ul{list-style:none;display:flex;gap:4px;margin:0;padding:0}
.nav a{display:block;padding:.5em .6em;border-radius:8px;text-decoration:none;color:var(--ink-2);font-weight:600;font-size:.92rem;white-space:nowrap}
.nav a:hover,.nav a[aria-current="page"]{background:var(--concrete);color:var(--ink)}
.hdr-cta{display:flex;gap:10px;align-items:center}
.hdr-phone{font-weight:800;text-decoration:none;color:var(--ink);white-space:nowrap}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;cursor:pointer;font:inherit;font-weight:700;color:var(--ink)}
@media (max-width:1360px){.hdr-phone{display:none}}
@media (max-width:1180px){
  .nav .only-m{display:list-item}
  .menu-btn{display:block}
  .nav{position:fixed;inset:68px 0 auto 0;background:var(--paper);border-bottom:1px solid var(--line);display:none;padding:12px var(--gut) 20px;margin:0;box-shadow:var(--shadow)}
  .nav.open{display:block}
  .nav ul{flex-direction:column}
  .nav a{padding:.8em .6em;font-size:1.05rem}
  .hdr-cta .btn{display:none}
}


/* hero */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.8}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(21,24,29,.9) 0%,rgba(21,24,29,.72) 38%,rgba(21,24,29,.2) 70%,rgba(21,24,29,0) 100%)}
@media (max-width:760px){.hero::after{background:linear-gradient(180deg,rgba(21,24,29,.78) 0%,rgba(21,24,29,.62) 100%)}}
.hero .wrap{position:relative;z-index:2;padding-block:clamp(64px,10vw,128px)}
.hero h1{max-width:18ch;color:#fff}
.hero .lead{color:#e6e3dd}
.hero .eyebrow{color:#ffb489}
.hero .btn-ghost{color:#fff}
.hero .btn-ghost:hover{background:#fff;color:var(--ink);border-color:#fff}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.14);border-radius:var(--r);overflow:hidden;margin-top:48px;max-width:860px}
.facts div{background:rgba(21,24,29,.55);padding:16px 18px}
.facts b{display:block;font-size:1.35rem;font-family:var(--mono);color:#fff}
.facts span{font-size:.85rem;color:#cfcac2}

.page-hero{background:var(--ink);color:#fff;padding-block:clamp(48px,7vw,88px)}
.page-hero h1{color:#fff;max-width:22ch}
.page-hero .lead{color:#dcd8d0}
.page-hero .eyebrow{color:#ffb489}
.crumbs{font-size:.85rem;margin-bottom:1.2em;color:#b9b4ab}
.crumbs a{color:#e8e3da}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4em;padding:0;margin:0}
.crumbs li+li::before{content:"/";margin-right:.4em;color:#7b766e}

/* sections */
.section{padding-block:clamp(56px,8vw,100px)}
.section.alt{background:var(--paper);border-block:1px solid var(--line)}
.section.dark{background:var(--ink);color:#fff}
.section.dark h2,.section.dark h3{color:#fff}
.section.dark .muted{color:#bdb8af}
.sec-head{max-width:760px;margin-bottom:40px}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr))}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,5vw,64px);align-items:center}
@media (max-width:860px){.split{grid-template-columns:1fr}}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;box-shadow:var(--shadow)}
.card h3{margin-bottom:.4em}
.card .ico{width:44px;height:44px;border-radius:10px;background:var(--accent-soft);color:var(--accent-ink);display:grid;place-items:center;margin-bottom:14px}
.card a.more{font-weight:700;text-decoration:none}
.card a.more::after{content:" →"}
.ticks{list-style:none;padding:0}
.ticks li{padding-left:1.6em;position:relative}
.ticks li::before{content:"";position:absolute;left:0;top:.55em;width:.9em;height:.5em;border-left:3px solid var(--accent);border-bottom:3px solid var(--accent);transform:rotate(-45deg)}
.answer{border-left:4px solid var(--accent);background:var(--paper);padding:18px 22px;border-radius:0 var(--r) var(--r) 0;margin:0 0 1.4em;box-shadow:var(--shadow)}
.answer p:last-child{margin:0}
.photo{border-radius:var(--r-lg);overflow:hidden;background:var(--concrete)}
.photo img{width:100%;height:100%;object-fit:cover}
figure{margin:0} figcaption{font-size:.85rem;color:var(--muted);padding-top:8px}

/* steps */
.steps{counter-reset:s;list-style:none;padding:0;display:grid;gap:14px}
.steps li{counter-increment:s;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:18px 18px 18px 70px;position:relative;margin:0}
.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:18px;top:16px;font-family:var(--mono);font-weight:700;font-size:1.2rem;color:var(--accent)}
.steps b{display:block;margin-bottom:2px}

/* slab cross-section */
.xsec{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow)}
.xsec svg{width:100%;height:auto}
.layers{list-style:none;padding:0;margin:14px 0 0;font-size:.92rem}
.layers li{display:grid;grid-template-columns:18px 1fr auto;gap:10px;align-items:center;padding:6px 0;border-bottom:1px dashed var(--line)}
.layers i{width:14px;height:14px;border-radius:3px;display:block}
.layers em{font-style:normal;font-family:var(--mono);color:var(--muted);font-size:.82rem}

/* table */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--paper)}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:.95rem}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line-2);vertical-align:top}
th{background:var(--concrete);font-weight:700}
table.compact{min-width:0}
td.num,th.num{text-align:right;font-family:var(--mono);white-space:nowrap}

/* faq */
.faq details{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);margin-bottom:10px}
.faq summary{cursor:pointer;padding:18px 52px 18px 20px;font-weight:700;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:12px;font-size:1.6rem;color:var(--accent);font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 20px 18px;color:var(--ink-2)}
.faq .a p:last-child{margin:0}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));gap:14px}
.gallery.four{grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr))}
.gallery figure{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.gallery img{aspect-ratio:4/3;object-fit:cover;width:100%}
.gallery figcaption{padding:10px 12px 12px}

/* CTA band */
.cta-band{background:var(--accent);color:#fff;border-radius:var(--r-lg);padding:clamp(28px,5vw,48px);display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.cta-band h2{color:#fff;margin:0 0 .2em}
.cta-band p{margin:0;color:#fff4ec}

/* forms */
.form{display:grid;gap:14px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:620px){.form .row{grid-template-columns:1fr}}
label{font-weight:600;font-size:.92rem;display:block;margin-bottom:4px}
input,select,textarea{width:100%;font:inherit;font-size:1rem;padding:.7em .8em;border:1px solid #cfcbc3;border-radius:8px;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:2px solid rgba(224,90,20,.2)}
textarea{min-height:130px;resize:vertical}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:.88rem;color:var(--ink-2)}
.check input{width:auto;margin-top:4px}
.filelist{list-style:none;padding:0;margin:8px 0 0;font-size:.86rem}
.filelist li{display:flex;gap:8px;align-items:center;justify-content:space-between;padding:6px 10px;background:var(--concrete);border-radius:8px;margin-bottom:6px}
.filelist button{background:none;border:0;color:var(--err);font:inherit;font-weight:700;cursor:pointer;padding:0 4px}
input[type=file]{padding:.55em .6em;background:#fff;font-size:.95rem}
.hint{font-size:.8rem;color:var(--muted);margin:4px 0 0}
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}
.form-msg{padding:12px 14px;border-radius:8px;font-weight:600;display:none}
.form-msg.ok{display:block;background:#e7f5ee;color:var(--ok)}
.form-msg.err{display:block;background:#fdecea;color:var(--err)}
.contact-list{list-style:none;padding:0}
.contact-list li{padding:10px 0;border-bottom:1px solid var(--line)}
.contact-list b{display:block;font-size:.8rem;font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}

/* footer */
.site-footer{background:#0f1115;color:#c9c4bb;padding-block:56px 28px;font-size:.93rem}
.site-footer a{color:#fff}
.site-footer h3{color:#fff;font-size:1rem;margin-bottom:.8em}
.site-footer ul{list-style:none;padding:0}
.ftr{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
@media (max-width:900px){.ftr{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.ftr{grid-template-columns:1fr}}
.ftr-bottom{border-top:1px solid #262a31;margin-top:40px;padding-top:20px;display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;font-size:.84rem;color:#9a958c}
.ai-note{display:inline-flex;align-items:center;gap:8px;background:#1b1f26;border:1px solid #2c313a;border-radius:999px;padding:6px 12px;color:#ddd8cf}
.linkbtn{background:none;border:0;padding:0;color:#fff;text-decoration:underline;cursor:pointer;font:inherit}
.social{display:flex;gap:10px;margin-top:12px}
.social a{width:38px;height:38px;border-radius:50%;background:#1b1f26;display:grid;place-items:center}
.social svg{width:18px;height:18px;fill:#fff}

/* cookie banner */
.cookie{position:fixed;left:16px;right:16px;bottom:16px;z-index:60;max-width:560px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:0 12px 40px rgba(0,0,0,.18);padding:20px}
.cookie h2{font-size:1.1rem;margin-bottom:.4em}
.cookie p{font-size:.9rem;margin-bottom:.8em;color:var(--ink-2)}
.cookie .btns{margin-top:.6em;gap:8px}
.cookie .btn{padding:.55em .95em;font-size:.9rem}
@media (max-width:480px){.cookie{padding:16px;left:10px;right:10px;bottom:10px}.cookie p{font-size:.85rem}}
.cookie-opts{display:grid;gap:8px;margin:10px 0;font-size:.9rem}
.cookie-opts label{font-weight:500;display:flex;gap:8px;align-items:flex-start;margin:0}
.cookie-opts input{width:auto;margin-top:5px}

/* chat widget */
.chat-fab{position:fixed;right:18px;bottom:18px;z-index:55;display:flex;align-items:center;gap:10px;background:var(--ink);color:#fff;border:0;border-radius:999px;padding:12px 18px 12px 14px;font:inherit;font-weight:700;cursor:pointer;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.chat-fab svg{width:24px;height:24px}
.chat-fab .dot{width:9px;height:9px;border-radius:50%;background:#35d07f;box-shadow:0 0 0 3px rgba(53,208,127,.25)}
.chat{position:fixed;right:18px;bottom:18px;z-index:58;width:min(400px,calc(100vw - 24px));height:min(620px,calc(100vh - 36px));background:var(--paper);border:1px solid var(--line);border-radius:18px;box-shadow:0 20px 60px rgba(0,0,0,.28);display:flex;flex-direction:column;overflow:hidden}
.chat[hidden]{display:none!important}
@media (max-width:480px){.chat{right:12px;bottom:12px}}
.chat-hd{background:var(--ink);color:#fff;padding:14px 16px;display:flex;gap:12px;align-items:center}
.chat-hd b{display:block} .chat-hd small{color:#bdb8af;font-size:.78rem}
.chat-hd button{margin-left:auto;background:none;border:0;color:#fff;font-size:1.5rem;cursor:pointer;line-height:1;padding:4px 8px}
.chat-disclaimer{font-size:.76rem;background:var(--accent-soft);color:#6b3310;padding:8px 14px;border-bottom:1px solid #f5d6c2}
.chat-log{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px;background:#faf9f7}
.msg{max-width:88%;padding:10px 13px;border-radius:14px;font-size:.93rem;line-height:1.5;white-space:pre-wrap;word-wrap:break-word}
.msg.bot{background:#fff;border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px}
.msg.user{background:var(--ink);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.msg a{color:var(--accent-ink)} .msg.user a{color:#ffd2b8}
.msg.typing{color:var(--muted);font-style:italic}
.chips{display:flex;flex-wrap:wrap;gap:6px;padding:0 14px 10px;background:#faf9f7}
.chips button{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 11px;font:inherit;font-size:.82rem;cursor:pointer;color:var(--ink-2)}
.chips button:hover{border-color:var(--accent);color:var(--accent-ink)}
.chat-form{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line)}
.chat-form textarea{min-height:44px;height:44px;max-height:120px;resize:none;padding:.6em .75em;font-size:.95rem}
.chat-form button{background:var(--accent);color:#fff;border:0;border-radius:10px;padding:0 14px;font-weight:700;cursor:pointer;font:inherit}
.chat-form button:disabled{opacity:.5;cursor:default}

/* calculator */
.calc{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start}
@media (max-width:900px){.calc{grid-template-columns:1fr}}
.calc fieldset{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--paper);padding:20px 22px;margin:0 0 16px}
.calc legend{font-weight:800;padding:0 6px;font-size:1.02rem}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:560px){.calc .row{grid-template-columns:1fr}}
.calc .hint{font-size:.8rem;color:var(--muted);margin-top:4px}
.opt{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px dashed var(--line)}
.opt:last-child{border-bottom:0}
.opt input{width:auto;margin-top:5px}
.opt label{margin:0;font-weight:600}
.opt .hint{margin:2px 0 0}
.result{position:sticky;top:88px;background:var(--ink);color:#fff;border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow)}
.result h2{color:#fff;font-size:1.2rem}
.result .big{font-family:var(--mono);font-size:clamp(1.35rem,2.5vw,1.85rem);font-weight:700;color:#fff;line-height:1.2}
.result .per{color:#ffb489;font-family:var(--mono);margin:.2em 0 1em}
.result table{min-width:0;font-size:.86rem;color:#e7e2d9}
.result td,.result th{border-color:#2d323a;padding:7px 4px;background:transparent}
.result .note{font-size:.78rem;color:#aaa49a;margin-top:12px}
.qty{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0}
.qty div{background:#1f242c;border-radius:8px;padding:8px 10px;font-size:.8rem;color:#bdb8af}
.qty b{display:block;color:#fff;font-family:var(--mono);font-size:1rem}
.range{display:flex;align-items:center;gap:12px}
.range input[type=range]{flex:1;padding:0;accent-color:var(--accent)}
.range output{font-family:var(--mono);font-weight:700;min-width:5.5ch;text-align:right}

.prose{max-width:780px}
.prose h2{margin-top:1.6em;font-size:1.5rem}
.prose h3{margin-top:1.3em}
.notice{background:#fff8e6;border:1px solid #f1dca4;border-radius:var(--r);padding:14px 16px;font-size:.92rem}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.site-header,.chat-fab,.chat,.cookie,.site-footer{display:none!important}}

/* mobilny pasek wyniku kalkulatora */
.calc-bar{display:none}
@media (max-width:900px){
 .calc-bar{display:flex;white-space:nowrap;font-size:.92rem;position:fixed;left:12px;right:164px;bottom:18px;z-index:54;background:var(--accent);color:#fff;border:0;border-radius:999px;padding:10px 16px;font:inherit;font-weight:700;align-items:center;justify-content:space-between;gap:8px;box-shadow:0 10px 30px rgba(0,0,0,.25);cursor:pointer}
 .calc-bar small{font-weight:500;opacity:.85}
 .calc-bar.off{display:none}
}

/* --- v2 SEO: przejście z czatu do człowieka --- */
.msg.handoff{background:#fff3e9;border:1px solid #f0c9ad;color:#2a2019}
.msg.handoff button{background:#e05a14;color:#fff;border:0;border-radius:999px;padding:7px 13px;font-size:.84rem;font-weight:600;cursor:pointer}
.msg.handoff button:hover{background:#c74d0f}
/* --- v2 SEO: podpowiedź pod polem formularza --- */
.form small.hint{display:block;margin-top:4px;font-size:.8rem;color:#6b6259}