/* PROUD — wspólny arkusz podstron. Tokeny i komponenty 1:1 ze stroną główną. */
:root{
  --canvas:#F5F4F0;
  --panel:#FFFFFF;
  --accent:#101012;
  --accent-hover:#2A2A30;
  --accent-muted:rgba(16,16,18,.07);
  --line:rgba(16,16,18,.14);
  --text-secondary:#4A4A50;
  --text-primary:#101012;
  --font-d:'Space Grotesk',sans-serif;
  --font-b:'IBM Plex Sans',sans-serif;
  --font-m:'JetBrains Mono',monospace;
  --ease:cubic-bezier(.33,1,.68,1);
  --ease-io:cubic-bezier(.65,0,.35,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{overflow-x:hidden;overflow-x:clip}
html{scroll-behavior:smooth}
body{background:var(--canvas);color:var(--text-primary);font-family:var(--font-b);font-size:17px;line-height:1.6}
::selection{background:rgba(16,16,18,.9);color:#F5F4F0}
.skip{position:absolute;left:-999px;top:0;z-index:200;background:var(--accent);color:#F5F4F0;padding:10px 18px;border-radius:0 0 10px 0;font-weight:600;text-decoration:none}
.skip:focus-visible{left:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* tło ambientowe jak na stronie głównej */
.bg-env{position:fixed;inset:0;z-index:-1;pointer-events:none;background:var(--canvas)}
.bg-env::before{content:"";position:absolute;inset:-20%;background:
  radial-gradient(ellipse 55% 45% at 18% 8%,rgba(16,16,18,.035) 0%,rgba(16,16,18,0) 60%),
  radial-gradient(ellipse 60% 50% at 85% 90%,rgba(16,16,18,.045) 0%,rgba(16,16,18,0) 62%);
  animation:envdrift 90s var(--ease-io) -30s infinite alternate}
.bg-env::after{content:"";position:absolute;inset:0;opacity:.06;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E")}
@keyframes envdrift{from{transform:translate3d(-2%,-1%,0) scale(1)}to{transform:translate3d(2%,2%,0) scale(1.06)}}

/* nawigacja */
nav.top{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;gap:26px;padding:16px clamp(18px,4vw,44px);transition:background .5s var(--ease),box-shadow .5s var(--ease)}
nav.top.scrolled{background:rgba(245,244,240,.86);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line)}
.brand{font-family:var(--font-d);font-weight:700;font-size:20px;letter-spacing:.1em;color:var(--text-primary);text-decoration:none}
.nav-links{display:flex;gap:22px;margin-left:auto;align-items:baseline}
.nav-links a{color:var(--text-secondary);text-decoration:none;font-size:14.5px;transition:color .3s var(--ease);padding:10px 0}
.nav-links a:hover{color:var(--text-primary)}
.nav-links a[aria-current="page"]{color:var(--text-primary);font-weight:600}
/* CTA w nawigacji: kolor i padding musza wygrac z regulami `.nav-links a` (wyzsza specyficznosc) */
.nav-links a.nav-cta,.nav-links a.nav-cta:hover{color:#F5F4F0}
.nav-links a.nav-cta{padding:12px 24px;margin-left:6px}
@media (max-width:400px){.nav-links a.nav-cta{padding:12px 18px;font-size:14px}}
@media (max-width:960px){.nav-links a:not(.nav-cta){display:none}.nav-links{gap:0}}

.btn{display:inline-block;background:var(--accent);color:#F5F4F0;font-family:var(--font-b);font-weight:600;font-size:15.5px;text-decoration:none;padding:12px 24px;border-radius:999px;border:0;cursor:pointer;transition:background .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease)}
.btn:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 8px 26px rgba(16,16,18,.22)}
.btn-ghost{background:transparent;color:var(--text-primary);border:1px solid rgba(16,16,18,.35)}
.btn-ghost:hover{background:var(--accent-muted);box-shadow:none}
@media (pointer:coarse){.btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center}.nav-links a{min-height:44px;display:inline-flex;align-items:center}}
/* cele dotykowe: samodzielne linki nawigacyjne min. 44px wysokosci */
.brand{display:inline-flex;align-items:center;min-height:44px}
@media (pointer:coarse){
  .crumbs a{display:inline-flex;align-items:center;min-height:44px}
  footer .fcol li a,footer .fmeta a,footer .fcol p a{display:inline-flex;align-items:center;min-height:44px}
  .related a{min-height:44px;display:inline-flex;align-items:center}
}

/* układ strony */
main.page{position:relative;display:block;padding-top:86px}
section{position:relative;z-index:1;padding:clamp(48px,7vh,84px) clamp(20px,5vw,60px);max-width:1180px;margin:0 auto}
section.page-head{padding-top:clamp(40px,6vh,70px);padding-bottom:clamp(28px,4vh,44px)}
.kicker{font-family:var(--font-m);font-size:12.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--text-secondary);margin-bottom:14px}
.kicker::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--accent);margin-right:10px;vertical-align:1px}
h1{font-family:var(--font-d);font-weight:700;font-size:clamp(30px,4.4vw,52px);line-height:1.16;letter-spacing:.01em;max-width:22ch}
h2{font-family:var(--font-d);font-weight:500;font-size:clamp(23px,2.8vw,34px);line-height:1.25;max-width:26ch}
h3{font-family:var(--font-b);font-weight:600;font-size:18.5px;line-height:1.45}
.lede{margin-top:18px;color:var(--text-secondary);font-size:clamp(16px,1.3vw,18.5px);max-width:62ch}

/* okruszki */
.crumbs{font-family:var(--font-m);font-size:12px;letter-spacing:.05em;color:var(--text-secondary);margin-bottom:22px}
.crumbs a{color:var(--text-secondary);text-decoration:none;border-bottom:1px solid rgba(16,16,18,.25);padding:6px 0}
.crumbs a:hover{color:var(--text-primary)}
.crumbs .sep{margin:0 8px;opacity:.6}

/* linki w treści: kolor marki zamiast domyślnego niebieskiego przeglądarki */
main.page a{color:var(--text-primary);text-underline-offset:3px;text-decoration-color:rgba(16,16,18,.35)}
main.page a.btn{color:#F5F4F0;text-decoration:none}
main.page a.card{text-decoration:none}

/* treść artykułowa */
.prose{max-width:72ch}
.prose h2{margin-top:44px}
.prose h3{margin-top:28px}
.prose p{margin-top:14px;color:var(--text-secondary)}
.prose p.strong,.prose strong{color:var(--text-primary)}
.prose a{color:var(--text-primary);text-underline-offset:3px;text-decoration-color:rgba(16,16,18,.35)}
.prose ul,.prose ol{margin:14px 0 0 20px;color:var(--text-secondary)}
.prose li{margin-top:7px}
.prose .note{margin-top:16px;font-size:14px;color:var(--text-secondary)}

/* karty i listy jak na stronie głównej */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-top:38px}
.card{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:30px 26px;transition:transform .5s var(--ease),border-color .5s var(--ease),box-shadow .5s var(--ease)}
.card:hover{transform:translateY(-4px);border-color:rgba(16,16,18,.35);box-shadow:0 14px 34px rgba(16,16,18,.08)}
.card .tag{font-family:var(--font-d);font-weight:700;font-size:15px;letter-spacing:.16em;color:var(--text-primary)}
.card h3{margin-top:14px}
.card p{margin-top:10px;color:var(--text-secondary);font-size:15.5px}
a.card{display:block;text-decoration:none;color:inherit}
a.card .go{margin-top:16px;font-family:var(--font-m);font-size:12.5px;letter-spacing:.08em;color:var(--text-primary)}
ul.spec{list-style:none;margin-top:12px}
ul.spec li{position:relative;padding:5px 0 5px 18px;color:var(--text-secondary);font-size:14.5px;line-height:1.5}
ul.spec li::before{content:"";position:absolute;left:0;top:13px;width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.7}

/* panele: TODO, cytaty, ramki */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:clamp(24px,3.5vw,38px);margin-top:30px}
.panel .ph{font-family:var(--font-m);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-primary)}
.todo{border:1px dashed rgba(16,16,18,.45);background:rgba(16,16,18,.03)}
.todo .ph::before{content:"TODO — ";font-weight:700}
.badge{display:inline-block;font-family:var(--font-m);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-secondary);border:1px solid var(--line);border-radius:999px;padding:5px 12px}

/* tabele (metodologia, baseline) */
.tbl-wrap{margin-top:26px;overflow-x:auto}
table.tbl{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;font-size:15px}
table.tbl th{font-family:var(--font-m);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-secondary);text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}
table.tbl td{padding:12px 16px;border-bottom:1px solid var(--line);color:var(--text-secondary)}
table.tbl tr:last-child td{border-bottom:0}
table.tbl td.strong{color:var(--text-primary);font-weight:600}

/* wzory metryk */
.formula{margin-top:18px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 18px;font-family:var(--font-m);font-size:14px;color:var(--text-primary);overflow-x:auto;white-space:nowrap}
.formula .fl{color:var(--text-secondary)}

/* FAQ */
.faq-list{max-width:860px;margin-top:30px}
.qa{border-bottom:1px solid var(--line)}
.qa summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:18px;align-items:baseline;padding:22px 4px;font-family:var(--font-b);font-weight:600;font-size:clamp(16px,1.4vw,18.5px)}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";font-family:var(--font-m);color:var(--text-primary);font-size:20px;transition:transform .4s var(--ease);flex:none}
.qa[open] summary::after{transform:rotate(45deg)}
.qa .a{padding:0 4px 24px;color:var(--text-secondary);max-width:68ch}

/* CTA panel */
.cta-panel{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:clamp(28px,4vw,46px);margin-top:44px;text-align:center}
.cta-panel h2{margin:0 auto;max-width:24ch}
.cta-panel p{margin:14px auto 0;color:var(--text-secondary);max-width:56ch}
.cta-panel .btn{margin-top:24px}

/* autor */
.author{display:flex;gap:14px;align-items:center;margin-top:44px;padding-top:24px;border-top:1px solid var(--line);font-size:14.5px;color:var(--text-secondary)}
.author .avatar{width:44px;height:44px;border-radius:50%;background:var(--accent-muted);border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-d);font-weight:700;color:var(--text-primary);flex:none}
.author a{color:var(--text-primary)}

/* powiązane usługi */
.related{margin-top:44px}
.related h2{font-size:clamp(19px,2vw,24px)}
.related ul{list-style:none;margin-top:16px;display:flex;flex-wrap:wrap;gap:10px}
.related a{display:inline-block;padding:10px 18px;border:1px solid rgba(16,16,18,.3);border-radius:999px;color:var(--text-primary);text-decoration:none;font-size:14.5px;transition:background .3s var(--ease)}
.related a:hover{background:var(--accent-muted)}

/* stopka */
footer{position:relative;z-index:1;padding:44px clamp(20px,5vw,60px) 54px;max-width:1180px;margin:0 auto;color:var(--text-secondary);font-size:13.5px;border-top:1px solid var(--line)}
footer .fcols{display:flex;flex-wrap:wrap;gap:28px 48px;justify-content:space-between}
footer .fb{font-family:var(--font-d);letter-spacing:.1em;color:var(--text-primary);font-size:15px;font-weight:700}
footer a{color:var(--text-secondary);text-underline-offset:3px}
footer a:hover{color:var(--text-primary)}
footer .fcol p{margin-top:6px}
footer .fcol .fh{font-family:var(--font-m);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-primary);margin-bottom:8px}
footer .fcol ul{list-style:none}
footer .fcol li{margin-top:6px}
footer .fmeta{margin-top:30px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;font-size:12.5px}

/* delikatne wejścia treści; wyłączone przy ograniczonym ruchu */
.reveal .rv{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in .rv{opacity:1;transform:none}
.reveal.in .rv:nth-child(2){transition-delay:.08s}
.reveal.in .rv:nth-child(3){transition-delay:.16s}
.reveal.in .rv:nth-child(4){transition-delay:.24s}
.reveal.in .rv:nth-child(5){transition-delay:.32s}

@media (max-width:720px){
  .cards{grid-template-columns:1fr}
  section{padding-left:20px;padding-right:20px}
}
/* animacje graja domyslnie; html.no-motion = recznie zatrzymane (wybor z localStorage, wspolny dla calego serwisu) */
html.no-motion{scroll-behavior:auto}
html.no-motion *,html.no-motion *::before,html.no-motion *::after{animation:none!important;transition:none!important}
html.no-motion .reveal .rv{opacity:1;transform:none}