:root{--paper:#f3f0e8;--ink:#15191a;--blue:#174fbd;--red:#ef3e2f;--lime:#c9f02a;--line:#c9c5b8}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif}.nav{height:84px;display:flex;align-items:center;justify-content:space-between;padding:0 5vw;border-bottom:1px solid var(--line);position:sticky;top:0;background:#f3f0e8e8;backdrop-filter:blur(10px);z-index:5}.logo{font-size:1rem;line-height:.83;font-weight:900;letter-spacing:-.08em;text-decoration:none;color:var(--ink)}.logo span{font-weight:400}.nav nav{display:flex;gap:28px}.nav nav a,.nav-cta{font-size:.69rem;text-transform:uppercase;letter-spacing:.12em;text-decoration:none;color:var(--ink)}.nav-cta{border-bottom:1px solid var(--red);padding-bottom:8px}.nav-cta b{color:var(--red);font-size:1rem;margin-left:18px}.hero{min-height:690px;padding:5vw;position:relative;display:grid;grid-template-columns:1.2fr .8fr;align-items:center;overflow:hidden;border-bottom:1px solid var(--line)}.hero-photo{position:absolute;inset:0 0 0 0;z-index:0}.hero-photo img{width:100%;height:100%;object-fit:cover;object-position:center;filter:saturate(.9)}.hero-photo:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--paper) 0%,#f3f0e8d5 22%,#f3f0e800 65%)}.hero-copy{position:relative;z-index:1;max-width:620px}.eyebrow,.section-label{font-size:.68rem;text-transform:uppercase;letter-spacing:.16em;color:#67675e}.hero h1{font-size:clamp(3.7rem,7vw,8rem);line-height:.84;letter-spacing:-.105em;margin:26px 0}.hero h1 em,.contact h2 em{font-style:normal;color:var(--red)}.hero-copy>p:not(.eyebrow){font:1.25rem Georgia,serif;line-height:1.4;max-width:430px}.button{display:inline-flex;align-items:center;gap:34px;background:var(--blue);color:white;text-decoration:none;text-transform:uppercase;font-size:.7rem;letter-spacing:.12em;padding:16px 20px;margin-top:24px}.button span{font-size:1.15rem}.hero-mark{position:absolute;right:5vw;bottom:5vw;color:var(--red);font:1.4rem monospace;z-index:1}.hero-mark span{font-size:.55rem;color:var(--ink);letter-spacing:.12em}.intro,.services,.process,.contact{padding:110px 8vw;border-bottom:1px solid var(--line)}.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:10vw;margin-top:45px}.intro h2,.contact h2{font-size:clamp(3rem,7vw,7rem);line-height:.85;letter-spacing:-.1em;margin:0}.intro p{max-width:450px;font:1.25rem Georgia,serif;line-height:1.5;margin:0}.intro svg{width:100%;max-width:300px;margin-top:40px;color:var(--blue)}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);margin-top:45px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}article{padding:28px 25px 32px;border-right:1px solid var(--line);min-height:245px}article:last-child{border:0}article span{color:var(--red);font:12px monospace}article h3,.process h3{font-size:1.2rem;text-transform:uppercase;letter-spacing:-.03em;margin:55px 0 12px}article p,.process p{color:#65665f;line-height:1.45;max-width:280px}article a{color:var(--blue);text-decoration:none;font-size:.7rem;text-transform:uppercase;letter-spacing:.1em}.process-line{display:grid;grid-template-columns:repeat(4,1fr);margin-top:45px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.process-line>div{padding:25px;border-right:1px solid var(--line)}.process-line>div:last-child{border:0}.process-line b{font:13px monospace;color:var(--red)}.process h3{margin-top:60px}.contact{background:var(--blue);color:white;min-height:500px}.contact .eyebrow{color:#d8e4ff}.contact h2{margin:28px 0}.contact .button{background:var(--lime);color:var(--ink)}footer{padding:24px 5vw;display:flex;justify-content:space-between;text-transform:uppercase;letter-spacing:.1em;font-size:.67rem}@media(max-width:780px){.nav{padding:0 6vw}.nav nav{display:none}.nav-cta{font-size:.6rem}.hero{min-height:700px;display:block;padding:80px 6vw}.hero-photo:after{background:linear-gradient(180deg,var(--paper) 0%,#f3f0e8c0 30%,#f3f0e800 75%)}.hero h1{font-size:18vw}.hero-mark{bottom:20px}.intro,.services,.process,.contact{padding:75px 6vw}.intro-grid{display:block}.intro-grid>div{margin-top:40px}.service-grid,.process-line{grid-template-columns:1fr}.service-grid article,.process-line>div{border-right:0;border-bottom:1px solid var(--line)}.process-line>div:last-child{border-bottom:0}footer{display:block;line-height:2.2;padding:24px 6vw}}
:root{--bg-extra:1}.hero-photo img{content:url('assets/hero-system.png')}.intro{background-image:linear-gradient(90deg,#f3f0eaf2,#f3f0eab8),url('assets/idea-system.png');background-size:cover;background-position:center}.services{background-image:linear-gradient(90deg,#f3f0eaf0,#f3f0eab0),url('assets/services-system.png');background-size:cover;background-position:center}.process{background-image:linear-gradient(90deg,#f3f0eaf2,#f3f0eab4),url('assets/process-system.png');background-size:cover;background-position:center}

/* ===== baner cookies (Consent Mode v2) ===== */
.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}
.cookie{position:fixed;left:0;right:0;bottom:0;z-index:80;background:var(--paper);border-top:1px solid var(--line);box-shadow:0 -8px 30px rgba(21,25,26,.09)}
.cookie[hidden]{display:none}
.cookie-inner{max-width:1200px;margin:0 auto;padding:18px clamp(20px,5vw,64px);display:flex;gap:24px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cookie-copy h3{margin:0 0 8px;font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--blue)}
.cookie-copy p{margin:0;font-size:.82rem;line-height:1.7;color:var(--ink);max-width:680px}
.cookie-copy a{color:var(--blue)}
.cookie-actions{display:flex;gap:12px;flex-wrap:wrap}
.cookie-actions button{background:none;border:1px solid var(--ink);color:var(--ink);padding:12px 20px;font:inherit;font-size:.78rem;cursor:pointer}
.cookie-actions button:hover{background:var(--ink);color:var(--paper)}
.cookie-actions button.accept{background:var(--blue);border-color:var(--blue);color:#fff}
.cookie-actions button.accept:hover{filter:brightness(1.08)}
.cookie-link{background:none;border:0;padding:0;color:var(--blue);font:inherit;font-size:inherit;cursor:pointer;text-decoration:underline}
@media(max-width:760px){.cookie-actions{width:100%}.cookie-actions button{flex:1}}

/* ===== panel czatu AI ===== */
.contact-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.chat-open{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.chat-open:hover{background:var(--ink);color:var(--paper)}
.chat{position:fixed;right:22px;bottom:22px;width:min(400px,92vw);max-height:min(560px,82vh);display:flex;flex-direction:column;z-index:80;background:var(--paper);color:var(--ink);border:1px solid var(--ink);box-shadow:6px 6px 0 rgba(21,25,26,.18)}
.chat[hidden]{display:none}
.chat-head{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border-bottom:1px solid var(--line);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase}
.chat-head button{background:none;border:0;color:var(--ink);cursor:pointer;font:inherit;font-size:.95rem;line-height:1}
.chat-log{padding:14px;overflow:auto;display:flex;flex-direction:column;gap:10px;font-size:.86rem;line-height:1.65;min-height:120px}
.chat-msg{max-width:90%;padding:9px 12px;border:1px solid var(--line);border-radius:12px;white-space:pre-wrap;background:#fff}
.chat-msg.assistant{border-color:var(--blue);color:var(--ink)}
.chat-msg.user{align-self:flex-end;background:var(--ink);color:var(--paper);border-color:var(--ink)}
.chat-msg.thinking{color:#6b6b6b}
.chat-form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line)}
.chat-form input{flex:1;background:#fff;border:1px solid var(--line);color:var(--ink);padding:10px 12px;font:inherit;font-size:.86rem}
.chat-form button{background:var(--blue);border:0;color:#fff;font:inherit;font-size:.78rem;padding:10px 14px;cursor:pointer}
@media(max-width:640px){.chat{right:10px;left:10px;bottom:10px;width:auto}}

/* ===== language switcher (ten sam mechanizm co proart.website / 9ii.pl) ===== */
.langnav{position:relative}
.langnav .lb{background:none;border:1px solid var(--line);color:var(--ink);font:inherit;font-size:.69rem;letter-spacing:.12em;text-transform:uppercase;padding:8px 12px;cursor:pointer;white-space:nowrap}
.langnav .lb:hover{border-color:var(--blue);color:var(--blue)}
.langnav .dd{display:none;position:absolute;right:0;top:calc(100% + 8px);min-width:210px;max-height:340px;overflow:auto;background:var(--paper);border:1px solid var(--ink);z-index:40;box-shadow:6px 6px 0 rgba(21,25,26,.15)}
.langnav .dd.open{display:block}
.langnav .dd button{display:flex;gap:10px;width:100%;text-align:left;background:none;border:0;color:var(--ink);font:inherit;font-size:.78rem;padding:9px 12px;cursor:pointer}
.langnav .dd button:hover{background:rgba(23,79,189,.10)}
.langnav .dd button.cur{color:var(--blue);font-weight:600}
@media(max-width:780px){.langnav .dd{right:auto;left:-40px}.langnav .lb{font-size:.62rem;padding:7px 9px}}