/* Twoja Skrzynka Pocztowa - style.css
   Design system wg brief-wdrozeniowy.md sekcja 2. Mobile-first, bez frameworków. */

:root{
  --ink:#1B1E21;
  --ink-2:#3A4046;
  --steel:#6B7278;
  --zinc:#9AA0A5;
  --paper:#FBFAF8;
  --panel:#ECEDEA;
  --panel-2:#E2E4E0;
  --line:#D8DAD6;
  --signal:#C8102E;
  --signal-dark:#9E0C24;
  --font-display:"Archivo","Arial Narrow",Arial,sans-serif;
  --font-body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",Consolas,monospace;
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;font-family:var(--font-body);color:var(--ink);background:var(--paper);line-height:1.6;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--font-display);font-weight:600;letter-spacing:-.02em;line-height:1.1;margin:0 0 .6em}
p{margin:0 0 1em}
ul,ol{padding-left:1.2em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.mono{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;text-transform:uppercase}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;padding:0;margin:-1px}
:focus-visible{outline:3px solid var(--signal);outline-offset:2px}

/* ---------- utility bar ---------- */
.util{background:var(--ink);color:#C9CDD1}
.util__in{max-width:var(--wrap);margin:0 auto;padding:.5rem 24px;display:flex;gap:1.5rem;flex-wrap:wrap;justify-content:space-between}
.util .mono{font-size:.7rem}
.util strong{color:#fff;font-weight:500}
.util a{color:#fff;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.3)}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:60;background:rgba(251,250,248,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hdr__in{max-width:var(--wrap);margin:0 auto;padding:.85rem 24px;display:flex;align-items:center;gap:1.5rem}
.logo{display:flex;align-items:center;gap:.6rem;text-decoration:none;flex:0 0 auto;white-space:nowrap}
.logo__mark{height:34px;width:auto;flex:0 0 auto}
.logo__txt{font-family:var(--font-display);font-weight:700;font-size:1.02rem;letter-spacing:-.03em;line-height:1.05}
.logo__sub{display:block;font-family:var(--font-mono);font-size:.6rem;letter-spacing:.14em;color:var(--steel);text-transform:uppercase;font-weight:400}
.nav{margin-left:auto;display:flex;align-items:center;gap:1.6rem}
.nav a{text-decoration:none;font-size:.92rem;color:var(--ink-2);padding:.25rem 0;border-bottom:2px solid transparent;white-space:nowrap}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--signal)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-family:var(--font-body);font-weight:600;font-size:.94rem;padding:.72rem 1.35rem;border-radius:2px;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:background .15s,color .15s}
.btn--primary{background:var(--signal);color:#fff}
.btn--primary:hover{background:var(--signal-dark)}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{background:#000}
.btn--ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn--ghost:hover{background:var(--ink);color:#fff}
.btn--block{width:100%}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:2px;padding:.5rem .6rem;cursor:pointer;flex:0 0 auto}
.burger span{display:block;width:20px;height:2px;background:var(--ink);margin:4px 0;transition:transform .2s,opacity .2s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fff 0%,var(--paper) 100%)}
.hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:3.5rem;align-items:center;padding:4rem 0 3.25rem}
.eyebrow{display:inline-flex;align-items:center;gap:.55rem;color:var(--signal);margin-bottom:1.1rem}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--signal)}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.5rem);font-weight:700;margin-bottom:1.1rem}
.hero h1 em{font-style:normal;color:var(--signal)}
.hero__lead{font-size:1.08rem;color:var(--ink-2);max-width:46ch;margin-bottom:1.9rem}
.hero__cta{display:flex;gap:.8rem;flex-wrap:wrap;margin-bottom:2.2rem}
.hero__facts{display:flex;gap:2.2rem;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:1.4rem}
.fact__n{font-family:var(--font-display);font-size:1.6rem;font-weight:700;line-height:1}
.fact__l{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.09em;text-transform:uppercase;color:var(--steel);margin-top:.35rem}
.hero__fig{position:relative;background:var(--panel);border:1px solid var(--line);padding:2rem}
.ph{font-family:var(--font-mono);font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;color:var(--steel);position:absolute;top:.7rem;left:.9rem}

/* ---------- sub-page header (kategoria/model/inne) ---------- */
.pagehead{border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fff 0%,var(--paper) 100%);padding:2.5rem 0}
.pagehead h1{font-size:clamp(1.8rem,3.6vw,2.6rem);margin-bottom:.6rem}
.pagehead__lead{color:var(--ink-2);max-width:60ch;font-size:1.02rem}

/* ---------- breadcrumb ---------- */
.breadcrumb{list-style:none;display:flex;flex-wrap:wrap;gap:.35rem;padding:1rem 0 0;margin:0;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;color:var(--steel)}
.breadcrumb li+li::before{content:"/";margin-right:.35rem}
.breadcrumb a{color:var(--steel);text-decoration:none}
.breadcrumb a:hover{color:var(--ink)}

/* ---------- strip (trust bar) ---------- */
.strip{background:var(--ink);color:#fff}
.strip__in{max-width:var(--wrap);margin:0 auto;padding:1.5rem 24px;display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.strip__i{display:flex;gap:.8rem;align-items:flex-start}
.strip__i svg{flex:0 0 auto;margin-top:2px}
.strip__t{font-weight:600;font-size:.95rem}
.strip__d{font-size:.82rem;color:#A9AFB5;line-height:1.45}

/* ---------- sections ---------- */
section{padding:4.5rem 0}
.sec-head{max-width:56ch;margin-bottom:2.5rem}
.sec-head h2{font-size:clamp(1.6rem,3vw,2.25rem);margin-bottom:.8rem}
.sec-head p{color:var(--ink-2)}

/* ---------- product cards + RAL switcher ---------- */
.prods{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.prods--2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column}
.card__fig{background:var(--panel);border-bottom:1px solid var(--line);padding:1.5rem;position:relative;min-height:230px;display:flex;align-items:center;justify-content:center}
.badge{position:absolute;top:0;right:0;background:var(--signal);color:#fff;font-family:var(--font-mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;padding:.35rem .6rem}
.card__body{padding:1.35rem;display:flex;flex-direction:column;gap:.85rem;flex:1}
.card__code{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;color:var(--steel)}
.card h3{font-size:1.18rem;margin-bottom:0}
.spec{font-family:var(--font-mono);font-size:.73rem;color:var(--ink-2);line-height:1.7;border-top:1px dashed var(--line);border-bottom:1px dashed var(--line);padding:.6rem 0}
.spec b{font-weight:500;color:var(--ink)}
.rals{display:flex;gap:.4rem;align-items:center;flex-wrap:wrap}
.ral{width:24px;height:24px;border-radius:50%;border:1px solid rgba(0,0,0,.18);cursor:pointer;padding:0}
.ral[aria-pressed="true"]{outline:2px solid var(--ink);outline-offset:2px}
.ral-name{font-family:var(--font-mono);font-size:.68rem;color:var(--steel);margin-left:.35rem}
.price-row{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;margin-top:auto}
.price{font-family:var(--font-display);font-size:1.4rem;font-weight:700}
.price small{font-family:var(--font-mono);font-size:.65rem;font-weight:400;color:var(--steel);display:block;letter-spacing:.08em;text-transform:uppercase}
.card .btn{width:100%}
.catalog-link{font-family:var(--font-mono);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;border-bottom:2px solid var(--signal);text-decoration:none;padding-bottom:2px;color:var(--ink)}

/* ---------- chooser ---------- */
.chooser{background:var(--panel)}
.choose-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.choose{background:#fff;border:1px solid var(--line);padding:1.6rem;display:flex;flex-direction:column;gap:.7rem}
.choose h3{font-size:1.1rem;margin-bottom:0}
.choose__when{font-size:.9rem;color:var(--ink-2);margin-bottom:0}
.choose__tag{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--signal)}
.choose a{margin-top:auto;font-weight:600;font-size:.9rem;text-decoration:none;border-bottom:2px solid var(--signal);align-self:flex-start;padding-bottom:2px}

/* ---------- process ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:2px solid var(--ink)}
.step{padding:1.6rem 1.4rem 1.6rem 0;border-right:1px solid var(--line)}
.step:last-child{border-right:none}
.step__n{font-family:var(--font-mono);font-size:.7rem;color:var(--signal);letter-spacing:.12em;margin-bottom:.6rem}
.step h3{font-size:1.02rem;margin-bottom:.45rem}
.step p{font-size:.88rem;color:var(--ink-2);margin-bottom:0}

/* ---------- wycena (dark CTA block) ---------- */
.wycena{background:var(--ink);color:#fff}
.wycena__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:3rem;align-items:start}
.wycena h2{font-size:clamp(1.6rem,3vw,2.25rem);margin-bottom:1rem}
.wycena p{color:#B9BEC3}
.wycena ul{color:#B9BEC3;font-size:.92rem;line-height:2;padding-left:1.1rem;margin:0 0 1.8rem}
.wycena__box{border:1px solid #33383D;padding:1.6rem}
.wycena__box h3{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:#9AA0A5;font-weight:400;margin-bottom:1.2rem}
.wycena__box ol{color:#B9BEC3;font-size:.9rem;line-height:1.9;padding-left:1.2rem;margin:0}
.btn--outline-dark{border:2px solid #4B5259;color:#fff;background:transparent}
.btn--outline-dark:hover{border-color:#fff}

/* ---------- gallery ---------- */
.gal{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}
.gal figure{margin:0;background:var(--panel);border:1px solid var(--line);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;overflow:hidden}
.gal img{width:100%;height:100%;object-fit:cover}
.gal figcaption{font-family:var(--font-mono);font-size:.65rem;letter-spacing:.08em;text-transform:uppercase;color:var(--steel);text-align:center;padding:.5rem}

/* ---------- article / category & guide copy ---------- */
.article{max-width:760px}
.article h2{font-size:clamp(1.5rem,2.6vw,2rem);margin-top:2rem;margin-bottom:1.2rem}
.article h3{font-size:1.15rem;margin-top:1.6rem;margin-bottom:.7rem}
.article p{color:var(--ink-2);margin-bottom:1.5rem}
.article a{color:var(--ink);border-bottom:1px solid var(--signal)}

/* ---------- faq ---------- */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:1.15rem 2rem 1.15rem 0;font-family:var(--font-display);font-weight:600;font-size:1.05rem;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:.2rem;top:.95rem;font-family:var(--font-mono);font-size:1.3rem;color:var(--signal)}
.faq details[open] summary::after{content:"-"}
.faq p{padding:0 2rem 1.3rem 0;color:var(--ink-2);font-size:.95rem;margin-bottom:0}

/* ---------- model page: spec table, montaz, related ---------- */
.model-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem;margin-bottom:1.5rem}
.model-gallery__main{grid-column:span 4;aspect-ratio:16/10;background:var(--panel);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.model-gallery__main img,.model-gallery__main svg{width:100%;height:100%;object-fit:contain}
.spec-table{width:100%;border-collapse:collapse;font-family:var(--font-mono);font-size:.85rem}
.spec-table th,.spec-table td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--line)}
.spec-table th{color:var(--steel);font-weight:400;width:45%}
.spec-table td{color:var(--ink)}
.dla-kogo{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;margin:1.5rem 0}
.dla-kogo__item{border:1px solid var(--line);background:#fff;padding:1.2rem}
.dla-kogo__tag{font-weight:700;font-size:.98rem;margin-bottom:.4rem;display:block}
.dla-kogo__opis{font-size:.9rem;color:var(--ink-2);margin-bottom:0}
.montaz-steps{counter-reset:step;list-style:none;padding:0;margin:0 0 1.5rem}
.montaz-steps li{counter-increment:step;padding:1rem 0 1rem 3rem;position:relative;border-bottom:1px solid var(--line)}
.montaz-steps li::before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:1rem;font-family:var(--font-mono);font-size:.75rem;color:var(--signal)}
.tools-list{display:flex;flex-wrap:wrap;gap:.5rem;list-style:none;padding:0;margin:0 0 1.5rem}
.tools-list li{background:var(--panel);border:1px solid var(--line);padding:.4rem .7rem;font-family:var(--font-mono);font-size:.75rem}
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}

/* ---------- forms (kontakt / wycena) ---------- */
.form{max-width:640px}
.form-row{margin-bottom:1.2rem}
.form-row label{display:block;font-weight:600;font-size:.92rem;margin-bottom:.4rem}
.form-row .hint{display:block;font-weight:400;color:var(--steel);font-size:.82rem;margin-top:.3rem}
.form-row input[type="text"],
.form-row input[type="tel"],
.form-row input[type="email"],
.form-row input[type="file"],
.form-row select,
.form-row textarea{width:100%;padding:.65rem .75rem;border:1px solid var(--line);border-radius:2px;font:inherit;background:#fff;color:var(--ink)}
.form-row textarea{min-height:130px;resize:vertical}
.form-row.is-invalid input,.form-row.is-invalid select,.form-row.is-invalid textarea{border-color:var(--signal)}
.form-error{color:var(--signal);font-size:.82rem;margin-top:.3rem;display:block}
.form-checkbox{display:flex;align-items:flex-start;gap:.6rem}
.form-checkbox input{margin-top:.3rem}
.form-honeypot{position:absolute;left:-9999px;top:-9999px}
.form-alert{padding:.9rem 1rem;border-radius:2px;margin-bottom:1.25rem;font-size:.92rem}
.form-alert--success{background:#E7F3EA;color:#1E6B34;border:1px solid #BFE0C8}
.form-alert--error{background:#FBEAEA;color:var(--signal-dark);border:1px solid #F0C4C4}
.wycena .form-row label,.wycena .form-row .hint{color:#fff}
.wycena .form-row input,.wycena .form-row select,.wycena .form-row textarea{background:#20242A;border-color:#3A4046;color:#fff}

/* ---------- footer ---------- */
.ftr{background:var(--ink);color:#B9BEC3;padding:3.5rem 0 0;font-size:.9rem}
.ftr h2{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:#fff;font-weight:500;margin-bottom:1rem}
.ftr__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:3rem}
.ftr a{color:#fff;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.25)}
.ftr ul{list-style:none;padding:0;margin:0;line-height:2}
.ftr ul a{border:none;color:#B9BEC3}
.ftr ul a:hover{color:#fff}
.ftr__bar{border-top:1px solid #33383D;margin-top:3rem;padding:1.2rem 0;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.06em;color:#7C838A;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}

/* ---------- cookie banner ---------- */
.cookie-banner{position:fixed;left:0;right:0;bottom:0;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 16px rgba(0,0,0,.12);padding:1rem 24px;display:flex;flex-wrap:wrap;gap:.9rem;align-items:center;justify-content:space-between;z-index:80}
.cookie-banner p{margin:0;flex:1 1 260px;font-size:.88rem;color:var(--ink-2)}
.cookie-banner__actions{display:flex;gap:.6rem;flex-shrink:0}

/* ---------- mobile nav panel ---------- */
@media(max-width:960px){
  .hero__grid{grid-template-columns:1fr;gap:2rem;padding:2.5rem 0}
  .strip__in{grid-template-columns:1fr 1fr;gap:1.2rem}
  .prods,.choose-grid,.dla-kogo,.related-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .step{border-bottom:1px solid var(--line);padding-right:1.4rem}
  .wycena__grid{grid-template-columns:1fr}
  .gal{grid-template-columns:1fr 1fr}
  .ftr__grid{grid-template-columns:1fr}
}
@media(max-width:720px){
  .burger{display:inline-flex;align-items:center;justify-content:center}
  .nav{position:fixed;top:0;right:0;height:100%;width:min(86vw,320px);background:#fff;box-shadow:-6px 0 24px rgba(0,0,0,.15);transform:translateX(100%);transition:transform .25s ease;overflow-y:auto;padding:5rem 1.5rem 2rem;z-index:70;flex-direction:column;align-items:flex-start;gap:0}
  .nav.is-open{transform:translateX(0)}
  .nav a{width:100%;padding:.85rem 0;border-bottom:1px solid var(--line);font-size:1rem}
  .nav a:hover{border-bottom-color:var(--line)}
  .nav .btn{margin-top:1rem;width:100%}
  .prods,.choose-grid,.dla-kogo,.related-grid{grid-template-columns:1fr}
  section{padding:3rem 0}
  .gal{grid-template-columns:1fr 1fr}
  .model-gallery{grid-template-columns:repeat(2,1fr)}
  .model-gallery__main{grid-column:span 2}
}

/* ---------- overlay behind open mobile nav ---------- */
.nav-scrim{position:fixed;inset:0;background:rgba(27,30,33,.4);z-index:65;opacity:0;pointer-events:none;transition:opacity .2s ease}
.nav-scrim.is-open{opacity:1;pointer-events:auto}