/* Sternik - podgląd nowy (5.11.2026 noc). Własny charakter: czerń programu #0B0C0E + błękit z interfejsu #4CC2FF,
   Archivo szerokie (napisy jak na burcie) + IBM Plex Sans (tekst) + JetBrains Mono (dane). Kąty proste,
   zero cieni, gradientów i poświat. Ścieżki /sternik/s4/... - działa w /sternik/nowy/ i po przełączeniu. */
@font-face{font-family:'Archivo';font-style:normal;font-weight:100 900;font-stretch:62% 125%;font-display:swap;src:url('/sternik/s4/fonts/Archivo-var-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2190-2199,U+2212,U+FEFF,U+FFFD}
@font-face{font-family:'Archivo';font-style:normal;font-weight:100 900;font-stretch:62% 125%;font-display:swap;src:url('/sternik/s4/fonts/Archivo-var-latin-ext.woff2') format('woff2');unicode-range:U+0100-024F,U+0259,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:100 700;font-display:swap;src:url('/sternik/s4/fonts/Plex-var-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2190-2199,U+2212,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:100 700;font-display:swap;src:url('/sternik/s4/fonts/Plex-var-latin-ext.woff2') format('woff2');unicode-range:U+0100-024F,U+0259,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400 800;font-display:swap;src:url('/sternik/s4/fonts/jetbrains-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2190-2199,U+2212,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400 800;font-display:swap;src:url('/sternik/s4/fonts/jetbrains-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1E9F,U+A720-A7FF}

:root{
  --bg:#0B0C0E;--l1:#0F1114;--l2:#15181C;--line:#1F242A;--line2:#2E353D;
  --tx:#DCE3EA;--hd:#F4F7FA;--mut:#9FAAB5;--dim:#717C88;
  --acc:#4CC2FF;--acc-ink:#03131D;--warn:#FFB020;
  --wide:'Archivo','IBM Plex Sans',system-ui,sans-serif;
  --sans:'IBM Plex Sans',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,Consolas,monospace;
  --pad:clamp(20px,4vw,56px);--hh:56px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:72px}
body{background:var(--bg);color:var(--tx);font:16.5px/1.65 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
::selection{background:var(--acc);color:var(--acc-ink)}
:focus-visible{outline:2px solid var(--acc);outline-offset:3px}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:99;background:var(--acc);color:var(--acc-ink);padding:8px 12px}
.wrap{max-width:1480px;margin:0 auto;padding:0 var(--pad)}
.lbl{display:block;font:600 11px/1.6 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}
h1,h2,h3{color:var(--hd);font-family:var(--wide);font-weight:800;font-stretch:112%;text-transform:uppercase;letter-spacing:-.01em}
h3{font-size:20px;line-height:1.15;font-stretch:105%;letter-spacing:0}
.note{color:var(--mut);font-size:14.5px;margin-top:24px;max-width:760px}
.note b{color:var(--hd)}

/* przyciski: prostokątne, kapitaliki */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--acc);color:var(--acc-ink);text-decoration:none;font:700 13px/1 var(--wide);font-stretch:115%;text-transform:uppercase;letter-spacing:.06em;padding:15px 22px;border:1px solid var(--acc);transition:background .15s,color .15s,border-color .15s}
.btn:hover{background:var(--hd);border-color:var(--hd);color:var(--bg)}
.btn-s{padding:10px 14px;font-size:11.5px}
.btn-l{padding:20px 28px;font-size:14px}
.lnk{display:inline-flex;align-items:center;gap:8px;color:var(--hd);text-decoration:none;font:700 12.5px/1 var(--wide);font-stretch:115%;text-transform:uppercase;letter-spacing:.08em;padding:8px 0;border-bottom:1px solid var(--line2);transition:color .15s,border-color .15s}
.lnk svg{width:15px;height:15px;transition:transform .2s}
.lnk:hover{color:var(--acc);border-color:var(--acc)}.lnk:hover svg{transform:translateY(2px) rotate(90deg)}

/* nagłówek */
.hd{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(11,12,14,.93);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:transform .28s ease}
.hd.hide{transform:translateY(-100%)}
.hd-in{display:flex;align-items:center;gap:28px;height:var(--hh);max-width:1480px;margin:0 auto;padding:0 var(--pad)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--hd)}
.koło{width:22px;height:22px;color:var(--acc);transition:transform .6s cubic-bezier(.2,.7,.2,1)}
.brand:hover .koło{transform:rotate(90deg)}
.nm{font:900 18px/1 var(--wide);font-stretch:125%;text-transform:uppercase;letter-spacing:.02em}
.ver{font:600 10px/1 var(--mono);color:var(--acc);border:1px solid var(--line2);padding:4px 5px;letter-spacing:.06em}
.menu{display:flex;margin-left:auto;align-items:center}
.menu a{position:relative;text-decoration:none;color:var(--mut);font:600 11.5px/1 var(--wide);font-stretch:112%;text-transform:uppercase;letter-spacing:.09em;padding:22px 12px}
.menu a::after{content:"";position:absolute;left:12px;right:12px;bottom:14px;height:2px;background:var(--acc);transform:scaleX(0);transform-origin:left;transition:transform .2s}
.menu a:hover,.menu a.on{color:var(--hd)}
.menu a:hover::after,.menu a.on::after{transform:scaleX(1)}
.menu .menu-cta{display:none}
.burger{display:none;width:44px;height:44px;background:none;border:1px solid var(--line2);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:6px}
.burger span{display:block;width:18px;height:2px;background:var(--hd);transition:transform .2s}
.burger[aria-expanded="true"] span:first-child{transform:translateY(4px) rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:translateY(-4px) rotate(-45deg)}

/* hero */
.hero{padding:calc(var(--hh) + clamp(44px,6vw,92px)) 0 0}
.eyebrow{display:flex;flex-wrap:wrap;gap:0;font:600 11px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.eyebrow span{padding:9px 12px;border:1px solid var(--line2)}
.eyebrow span+span{border-left:0}
.eyebrow span:first-child{color:var(--acc)}
.hero h1{font-size:clamp(34px,3.9vw,78px);line-height:.94;font-stretch:115%;letter-spacing:-.02em;margin-top:30px}
.hero h1 em{font-style:normal;color:var(--acc)}
.hero-g{display:grid;grid-template-columns:minmax(0,5.2fr) minmax(0,6.8fr);gap:clamp(32px,4.5vw,80px);align-items:center}
.hero-tx .lead{margin-top:30px}
.lead{font-size:clamp(17px,1.3vw,20px);line-height:1.6;color:var(--mut)}
.hero-cta{display:flex;flex-wrap:wrap;align-items:center;gap:18px 26px;margin-top:32px}
.state{display:flex;gap:12px;align-items:flex-start;margin-top:28px;padding-top:18px;border-top:1px solid var(--line);font:500 12.5px/1.6 var(--mono);color:var(--mut)}
.state .sq{flex:none;width:8px;height:8px;margin-top:6px;background:var(--warn);animation:stBlink 2.2s steps(1) infinite}
@keyframes stBlink{50%{opacity:.3}}
.deck{margin:0}
.deck-tabs{display:flex;border:1px solid var(--line2);border-bottom:0;overflow-x:auto;scrollbar-width:none}
.deck-tabs::-webkit-scrollbar{display:none}
.deck-tabs button{flex:1;background:none;border:0;color:var(--dim);font:700 10.5px/1 var(--wide);font-stretch:112%;text-transform:uppercase;letter-spacing:.08em;padding:13px 10px;cursor:pointer;white-space:nowrap;transition:color .15s,background .15s}
.deck-tabs button+button{border-left:1px solid var(--line)}
.deck-tabs button:hover{color:var(--hd)}
.deck-tabs button[aria-selected="true"]{color:var(--hd);background:var(--l2)}
.deck-bar{height:3px;background:var(--line);border-left:1px solid var(--line2);border-right:1px solid var(--line2)}
.deck-bar i{display:block;height:100%;width:0;background:var(--acc)}
.deck-scr{position:relative;aspect-ratio:1160/760;border:1px solid var(--line2);border-top:0;background:#000;overflow:hidden}
.deck-scr img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .35s ease}
.deck-scr img.on{opacity:1}
.deck figcaption{display:flex;justify-content:space-between;gap:16px;font:500 11px/1.5 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--dim);padding-top:12px}
.facts{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:clamp(56px,7vw,96px)}
.facts li{padding:26px 24px 24px 0}
.facts li+li{padding-left:24px;border-left:1px solid var(--line)}
.facts b{display:block;font:800 clamp(32px,3.6vw,52px)/1 var(--wide);font-stretch:118%;color:var(--hd)}
.facts span{display:block;font-size:14px;color:var(--mut);margin-top:10px}

/* sekcje */
.sec{padding:clamp(80px,10vw,136px) 0 0}
.sec.tight{padding-top:clamp(64px,7vw,96px)}
.band{margin-top:clamp(80px,10vw,136px);padding-bottom:clamp(80px,10vw,136px);background:var(--l1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band+.sec{padding-top:clamp(80px,10vw,136px)}
.sh{margin-bottom:clamp(36px,4.5vw,60px);max-width:980px}
.sh .lbl{color:var(--acc);margin-bottom:16px}
.sh h2{font-size:clamp(30px,4.2vw,64px);line-height:.98;letter-spacing:-.015em}
.sub{color:var(--mut);font-size:17px;margin-top:18px;max-width:620px}
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);gap:clamp(32px,6vw,96px);align-items:start}
.two .sh{position:sticky;top:96px}

/* trasa: 4 kroki jak odcinki kursu */
.route{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:1px solid var(--line2);position:relative}
.route li{padding:28px 24px 0 0;position:relative}
.route li+li{padding-left:24px;border-left:1px solid var(--line)}
.route li::before{content:"";position:absolute;top:-1px;left:0;height:3px;width:0;background:var(--acc);transition:width .9s cubic-bezier(.2,.7,.2,1)}
.route li.in::before{width:56px}
.route li+li::before{left:24px}
.route .n{display:block;font:800 44px/1 var(--wide);font-stretch:125%;color:var(--line2);transition:color .3s}
.route li:hover .n{color:var(--acc)}
.route b{display:block;font:600 11px/1.6 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--acc);margin-top:18px}
.route h3{margin-top:6px}
.route p{color:var(--mut);font-size:15px;margin-top:10px}

/* moduły */
.mod{display:grid;grid-template-columns:minmax(0,3.6fr) minmax(0,8.4fr);gap:clamp(24px,3.5vw,56px);align-items:start}
.mod-nav{display:flex;flex-direction:column;border-top:1px solid var(--line2);position:sticky;top:88px}
.mod-nav button{display:grid;grid-template-columns:36px 1fr;gap:2px 10px;text-align:left;background:none;border:0;border-bottom:1px solid var(--line);color:var(--mut);padding:16px 12px 16px 0;cursor:pointer;font:800 15px/1.2 var(--wide);font-stretch:112%;text-transform:uppercase;letter-spacing:.02em;position:relative;transition:color .15s,padding .2s}
.mod-nav button span{grid-row:span 2;font:600 11px/1.9 var(--mono);color:var(--dim);letter-spacing:.06em}
.mod-nav button i{font:400 13.5px/1.4 var(--sans);font-style:normal;text-transform:none;letter-spacing:0;color:var(--dim)}
.mod-nav button::before{content:"";position:absolute;left:-1px;top:-1px;bottom:-1px;width:3px;background:var(--acc);transform:scaleY(0);transition:transform .2s}
.mod-nav button:hover{color:var(--hd)}
.mod-nav button[aria-selected="true"]{color:var(--hd);padding-left:16px}
.mod-nav button[aria-selected="true"]::before{transform:none}
.mod-nav button[aria-selected="true"] span{color:var(--acc)}
.js .mp{display:none}
.js .mp.on{display:grid;animation:stFade .35s ease}
@keyframes stFade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.mp{display:grid;grid-template-columns:minmax(0,1fr);gap:24px}
.mp+.mp{margin-top:48px}
.js .mp+.mp{margin-top:0}
.mp-img{border:1px solid var(--line2);border-top:3px solid var(--acc);background:#000}
.mp-img img{width:100%}
.mp-tx{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:8px 36px}
.mp-tx .lbl{grid-column:1/-1;color:var(--acc)}
.mp-tx h3{font-size:clamp(20px,1.8vw,26px)}
.mp-tx p{color:var(--mut);font-size:15.5px}
.mp-tx ul{grid-column:2;list-style:none;margin-top:4px}
.mp-tx li{position:relative;padding:9px 0 9px 22px;border-top:1px solid var(--line);font-size:14.5px;color:var(--tx)}
.mp-tx li::before{content:"";position:absolute;left:0;top:18px;width:10px;height:2px;background:var(--acc)}

/* zasady */
.rules{list-style:none;border-top:1px solid var(--line2)}
.rules li{display:grid;grid-template-columns:72px 1fr;gap:16px;padding:24px 0;border-bottom:1px solid var(--line)}
.rules li>span{font:800 32px/1 var(--wide);font-stretch:125%;color:var(--line2);transition:color .3s}
.rules li:hover>span{color:var(--acc)}
.rules b{display:block;font:800 18px/1.2 var(--wide);font-stretch:108%;text-transform:uppercase;color:var(--hd)}
.rules p{color:var(--mut);margin-top:8px;font-size:15.5px}

/* zmiany */
.changes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:3px solid var(--acc)}
.changes>div{padding:26px 26px 0 0}
.changes>div+div{padding-left:26px;border-left:1px solid var(--line)}
.changes b{font:800 14px/1 var(--wide);font-stretch:118%;text-transform:uppercase;letter-spacing:.06em;color:var(--hd)}
.changes ul{list-style:none;margin-top:14px}
.changes li{padding:10px 0;border-top:1px solid var(--line);color:var(--mut);font-size:15px}

/* jak zacząć */
.start{list-style:none;border-top:1px solid var(--line2)}
.start li{display:grid;grid-template-columns:48px 1fr;gap:12px;padding:18px 0;border-bottom:1px solid var(--line);font-size:16.5px}
.start span{font:700 14px/1.6 var(--mono);color:var(--acc)}

/* kod i pliki */
.kod{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:clamp(28px,5vw,80px);align-items:start}
.kod-state{border-top:3px solid var(--warn);padding-top:24px}
.kod-state .lbl{color:var(--warn)}
.kod-state h3{margin-top:8px;font-size:clamp(20px,1.8vw,26px)}
.kod-state p{color:var(--mut);margin-top:12px}
.kod-state p.small{font-size:13.5px;color:var(--dim)}
.kod-links{border-top:1px solid var(--line2)}
.kl{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 4px 20px 0;border-bottom:1px solid var(--line);text-decoration:none;transition:padding .2s,background .15s}
.kl b{display:block;font:800 17px/1.2 var(--wide);font-stretch:112%;text-transform:uppercase;color:var(--hd);transition:color .15s}
.kl i{display:block;font-style:normal;font-size:14px;color:var(--dim);margin-top:4px}
.kl svg{width:18px;height:18px;flex:none;color:var(--mut);transition:transform .2s,color .15s}
.kl:hover{padding-left:12px}
.kl:hover b,.kl:hover svg{color:var(--acc)}
.kl:hover svg{transform:translateX(3px)}
.kl.main b{color:var(--acc)}

/* FAQ */
.faq details{border-top:1px solid var(--line)}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:20px;padding:20px 0;font:600 17.5px/1.4 var(--sans);color:var(--hd);transition:color .15s}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:400 22px/1 var(--mono);color:var(--acc);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq summary:hover{color:var(--acc)}
.faq p{color:var(--mut);padding:0 0 22px;max-width:760px}
.faq a{color:var(--acc)}

/* więcej */
.more{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:18px}
.more a{display:block;text-decoration:none;border-top:1px solid var(--line2);padding:18px 0 4px;transition:border-color .15s}
.more b{display:block;color:var(--hd);font:600 17px/1.35 var(--sans);margin-top:8px;transition:color .15s}
.more a:hover{border-top-color:var(--acc)}.more a:hover b{color:var(--acc)}

/* stopka */
.ft{margin-top:clamp(80px,10vw,136px);border-top:3px solid var(--acc);padding:30px 0}
.ft-in{display:flex;flex-wrap:wrap;align-items:center;gap:14px 28px;font-size:14px;color:var(--dim)}
.ft-in nav{display:flex;flex-wrap:wrap;gap:8px 20px;margin-left:auto}
.ft-in nav a{color:var(--mut);text-decoration:none}.ft-in nav a:hover{color:var(--acc)}

/* wejścia */
.js .rv{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1)}
.js .rv.in{opacity:1;transform:none}
.js .rv.d1{transition-delay:.08s}.js .rv.d2{transition-delay:.16s}.js .rv.d3{transition-delay:.24s}
@media (prefers-reduced-motion:reduce){.js .rv{opacity:1;transform:none;transition:none}.state .sq{animation:none}.js .mp.on{animation:none}html{scroll-behavior:auto}.deck-scr img{transition:none}}

@media (max-width:1180px){
  .menu a{padding:22px 8px}.menu a::after{left:8px;right:8px}
  .route{grid-template-columns:repeat(2,minmax(0,1fr))}
  .route li:nth-child(3){padding-left:0;border-left:0}
  .route li:nth-child(n+3){padding-top:32px}
  .route li:nth-child(3)::before{left:0}
  .more{grid-template-columns:repeat(2,minmax(0,1fr))}
  .mp-tx{grid-template-columns:minmax(0,1fr)}.mp-tx ul{grid-column:1}
}
@media (max-width:980px){
  /* 9.11.2026: backdrop-filter robil z naglowka kontener dla position:fixed - menu mialo 40 px zamiast calego ekranu */
  .hd{-webkit-backdrop-filter:none;backdrop-filter:none;background:rgb(11,12,14)}
  .burger{display:flex}
  .hd-cta{margin-left:auto}
  .menu{position:fixed;top:var(--hh);left:0;right:0;bottom:0;flex-direction:column;align-items:stretch;background:var(--bg);padding:8px var(--pad) 32px;overflow-y:auto;transform:translateX(100%);visibility:hidden;transition:transform .25s ease,visibility 0s .25s;margin:0}
  .menu.open{transform:none;visibility:visible;transition:transform .25s ease}
  .menu a{font-size:18px;color:var(--hd);padding:20px 0;border-bottom:1px solid var(--line)}
  .menu a::after{display:none}
  .menu .menu-cta{display:flex;justify-content:center;margin-top:24px;background:var(--acc);color:var(--acc-ink);border:0;font-size:14px}
  .hero-g{grid-template-columns:minmax(0,1fr)}
  .hero h1{font-size:clamp(34px,7.4vw,72px)}
  .facts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .facts li:nth-child(3){padding-left:0;border-left:0}
  .facts li:nth-child(n+3){border-top:1px solid var(--line)}
  .two,.kod{grid-template-columns:minmax(0,1fr)}
  .two .sh{position:static}
  .mod{grid-template-columns:minmax(0,1fr)}
  .mod-nav{display:none}
  .js .mp,.js .mp.on{display:grid;animation:none}
  .js .mp+.mp{margin-top:56px}
  .changes{grid-template-columns:minmax(0,1fr)}
  .changes>div+div{padding-left:0;border-left:0}
}
@media (max-width:640px){
  body{font-size:16px}
  .hd-in{gap:12px}
  .ver{display:none}
  .hd-cta{display:none}
  .burger{margin-left:auto}
  .eyebrow{font-size:9.5px;letter-spacing:.1em}
  .eyebrow span{padding:8px 9px}
  .hero h1{font-size:clamp(30px,9.4vw,44px);font-stretch:108%}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .lnk{align-self:flex-start}
  .deck-tabs button{flex:none;padding:12px 12px}
  .deck figcaption{flex-direction:column;gap:2px}
  .facts li,.facts li+li{padding:20px 12px 18px 0}
  .facts li:nth-child(even){padding-left:16px}
  .route{grid-template-columns:minmax(0,1fr)}
  .route li,.route li+li{padding:26px 0 0;border-left:0}
  .route li+li::before{left:0}
  .more{grid-template-columns:minmax(0,1fr)}
  .rules li{grid-template-columns:48px 1fr}
  .sh h2{font-size:clamp(28px,8.4vw,40px)}
  .ft-in nav{margin-left:0}
}