/* Stechiometria krok po kroku */
@font-face{font-family:'Bricolage Grotesque';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/bricolage-grotesque-latin-500-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Bricolage Grotesque';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/bricolage-grotesque-latin-ext-500-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Bricolage Grotesque';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/bricolage-grotesque-latin-700-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Bricolage Grotesque';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/bricolage-grotesque-latin-ext-700-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,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:400;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-400-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-ext-400-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,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:500;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-500-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-ext-500-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,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:600;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-600-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-ext-600-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,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:italic;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-400-italic.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans';font-style:italic;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-sans-latin-ext-400-italic.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-mono-latin-400-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ibm-plex-mono-latin-ext-400-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ibm-plex-mono-latin-500-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/ibm-plex-mono-latin-ext-500-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}
/* Layout: zeszyt laboratoryjny — zakładki Teoria / Zadania / Narzędzia, zadania w układzie lista + karta rozwiązania */
:root{
  --bg:#EDF1F0; --paper:#FAFCFB; --ink:#132029; --muted:#55666E; --line:#D2DBDA; --line-strong:#AFBDBD;
  --accent:#1B5DA6; --accent-ink:#FFFFFF; --accent-soft:#DDE8F4;
  --warn:#8A5208; --warn-soft:#F5E8D2; --ok:#1C7347; --ok-soft:#DCEFE3; --bad:#A8362A; --bad-soft:#F6DFDA;
  --tile:#E2E9EE;
  --f-display:"Bricolage Grotesque","Segoe UI",system-ui,sans-serif;
  --f-body:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0E161A; --paper:#152129; --ink:#E2EBEE; --muted:#93A6AE; --line:#26353E; --line-strong:#3A4D58;
  --accent:#74AEEC; --accent-ink:#0B1A2A; --accent-soft:#1A2F47;
  --warn:#E6B062; --warn-soft:#352914; --ok:#62C893; --ok-soft:#14321F; --bad:#EF8073; --bad-soft:#3B1D19;
  --tile:#1D2C35; color-scheme:dark;}}
:root[data-theme="dark"]{
  --bg:#0E161A; --paper:#152129; --ink:#E2EBEE; --muted:#93A6AE; --line:#26353E; --line-strong:#3A4D58;
  --accent:#74AEEC; --accent-ink:#0B1A2A; --accent-soft:#1A2F47;
  --warn:#E6B062; --warn-soft:#352914; --ok:#62C893; --ok-soft:#14321F; --bad:#EF8073; --bad-soft:#3B1D19;
  --tile:#1D2C35; color-scheme:dark;}

*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.6;}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--paper)}
h1,h2,h3,h4{font-family:var(--f-display);line-height:1.2;text-wrap:balance;margin:0}
h2{font-size:1.65rem;font-weight:700}
h3{font-size:1.25rem;font-weight:700}
h4{font-size:1.05rem;font-weight:700}
p{margin:0}
a{color:var(--accent)}
sub,sup{font-size:.72em;line-height:0}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.fm{white-space:nowrap}
.wrap{max-width:1180px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:9;background:var(--paper);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;padding-block:10px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.logo{display:grid;grid-template-rows:auto 1fr;width:44px;height:44px;border:1.5px solid var(--ink);border-radius:4px;padding:2px 4px;font-family:var(--f-mono);flex:none}
.logo small{font-size:9px;line-height:1}
.logo b{font-family:var(--f-display);font-size:19px;line-height:1;align-self:center;justify-self:center}
.brand h1{font-size:1.15rem}
.brand p{font-size:.8rem;color:var(--muted)}
.tabs{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.tab{text-decoration:none;white-space:nowrap;border:1px solid transparent;background:none;padding:7px 14px;border-radius:999px;cursor:pointer;font-weight:500;color:var(--muted)}
.tab:hover{color:var(--ink);border-color:var(--line)}
.tab[aria-selected="true"]{background:var(--ink);color:var(--paper)}

main{padding-block:28px 64px}
.panel[hidden]{display:none}

/* intro */
.intro{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:28px;align-items:start;margin-bottom:36px}
.intro h2{font-size:2.1rem;margin-bottom:12px}
.intro p{color:var(--muted);max-width:62ch}
.intro p + p{margin-top:10px}
.algo{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:18px 20px}
.algo h3{font-size:1.05rem;margin-bottom:10px}
.algo ol{margin:0;padding-left:1.3em;display:grid;gap:6px;font-size:.95rem}
.btn{text-decoration:none;color:var(--ink);display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line-strong);background:var(--paper);padding:8px 14px;border-radius:8px;cursor:pointer;font-weight:500}
.btn:hover{border-color:var(--ink)}
.btn.primary{background:var(--accent);color:var(--accent-ink)!important;border-color:var(--accent)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.small{padding:5px 10px;font-size:.88rem}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}

/* theory */
.toc{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:28px}
.toc a{text-decoration:none;color:var(--ink);border:1px solid var(--line);background:var(--paper);padding:4px 11px;border-radius:999px;font-size:.88rem}
.toc a:hover{border-color:var(--accent);color:var(--accent)}
.toc a span{font-family:var(--f-mono);color:var(--muted);margin-right:4px;font-size:.8rem}
.theory{display:grid;gap:22px}
.tsec{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:24px clamp(16px,3vw,32px);scroll-margin-top:90px}
.tsec > header{display:flex;align-items:baseline;gap:12px;margin-bottom:14px}
.tsec > header .num{font-family:var(--f-mono);font-size:.85rem;color:var(--accent);flex:none}
.tbody{display:grid;gap:12px;max-width:76ch}
.tbody ul,.tbody ol{margin:0;padding-left:1.25em;display:grid;gap:4px}
.note,.tip,.trap{border-radius:8px;padding:12px 14px;font-size:.95rem}
.note{background:var(--accent-soft)}
.tip{background:var(--ok-soft)}
.trap{background:var(--warn-soft)}
.note b:first-child,.tip b:first-child,.trap b:first-child{display:block;font-family:var(--f-display);margin-bottom:2px}
.trap b:first-child{color:var(--warn)}
.tip b:first-child{color:var(--ok)}
.note b:first-child{color:var(--accent)}
.calc{font-family:var(--f-mono);font-size:.93rem;background:var(--bg);border-radius:6px;padding:8px 12px;overflow-x:auto}
.eq{font-family:var(--f-mono);font-size:1.02rem;padding:8px 12px;border-left:3px solid var(--accent);background:var(--bg);border-radius:0 6px 6px 0;overflow-x:auto;white-space:nowrap}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px}
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{text-align:left;padding:7px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:600;background:var(--bg);font-size:.82rem;letter-spacing:.03em;text-transform:uppercase;color:var(--muted)}
tr:last-child td{border-bottom:0}
td.n{font-family:var(--f-mono);font-variant-numeric:tabular-nums;text-align:right}

.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(88px,1fr));gap:6px}
.tile{background:var(--tile);border-radius:6px;padding:6px 8px;display:grid;font-family:var(--f-mono);font-size:.72rem;color:var(--muted)}
.tile b{font-family:var(--f-display);font-size:1.35rem;color:var(--ink);line-height:1.1}
.tile .m{color:var(--ink);font-size:.82rem}

/* proportion */
.prop{display:inline-grid;justify-self:start;gap:6px;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:12px 16px;max-width:100%;overflow-x:auto}
.prop-grid{display:grid;grid-template-columns:auto auto auto;gap:4px 14px;align-items:center;font-family:var(--f-mono);font-size:.95rem}
.prop-grid .dash{color:var(--muted)}
.prop-grid .lab{grid-column:1/-1;font-family:var(--f-body);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-top:2px}
.prop-grid > span:not(.lab):not(.dash){white-space:nowrap}
.prop-calc{font-family:var(--f-mono);font-size:.93rem;border-top:1px dashed var(--line-strong);padding-top:8px}
.x{color:var(--accent);font-weight:600}

/* quick check */
.qc{display:flex;flex-wrap:wrap;gap:8px;align-items:center;border:1px dashed var(--line-strong);border-radius:8px;padding:10px 12px;font-size:.95rem}
.qc label{flex:1 1 260px}
.qc input{width:110px}
.fb{font-size:.9rem;font-weight:500}
.fb.ok{color:var(--ok)} .fb.bad{color:var(--bad)}
input[type=text],input[type=number],select{background:var(--paper);border:1px solid var(--line-strong);border-radius:6px;padding:6px 9px;min-width:0}
input[type=text]:focus,input[type=number]:focus,select:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}

/* diagram */
.diagram-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--bg);padding:10px}
.dg{display:block;width:100%;min-width:640px;height:auto}
.dg .box{fill:var(--paper);stroke:var(--line-strong);stroke-width:1.2}
.dg .key{fill:var(--accent-soft);stroke:var(--accent);stroke-width:1.5}
.dg .t{fill:var(--ink);font-family:var(--f-display);font-size:15px;font-weight:700;text-anchor:middle}
.dg .s{fill:var(--muted);font-family:var(--f-mono);font-size:12.5px;text-anchor:middle}
.dg .lbl{fill:var(--accent);font-family:var(--f-mono);font-size:13px;font-weight:500;text-anchor:middle}
.dg .hd{fill:var(--muted);font-family:var(--f-body);font-size:11px;letter-spacing:.08em;text-anchor:middle}
.dg .ln{stroke:var(--ink);stroke-width:1.4;fill:none}
.dg .head{fill:var(--ink)}

/* tasks layout */
.tasks{display:grid;grid-template-columns:240px minmax(0,1fr);gap:24px;align-items:start}
.tlist{position:sticky;top:calc(env(safe-area-inset-top,0px) + 84px);display:grid;gap:2px;max-height:calc(100vh - 110px);overflow-y:auto;padding-right:4px}
.tlist button{display:grid;grid-template-columns:28px 1fr 16px;gap:6px;align-items:center;text-align:left;border:0;background:none;padding:6px 8px;border-radius:7px;cursor:pointer;font-size:.9rem;color:var(--muted)}
.tlist button:hover{background:var(--paper);color:var(--ink)}
.tlist button[aria-current="true"]{background:var(--paper);color:var(--ink);box-shadow:inset 0 0 0 1px var(--line-strong)}
.tlist .no{font-family:var(--f-mono);font-size:.8rem}
.tlist .dot{width:10px;height:10px;border-radius:50%;border:1.5px solid var(--line-strong)}
.tlist .done .dot{background:var(--ok);border-color:var(--ok)}
.progress{font-size:.8rem;color:var(--muted);padding:0 8px 8px}
.progress .bar{height:4px;background:var(--line);border-radius:4px;margin-top:4px;overflow:hidden}
.progress .bar i{display:block;height:100%;background:var(--ok);width:0}

.card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:24px clamp(16px,3vw,32px);display:grid;gap:20px;min-width:0}
.card-head{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:10px}
.eyebrow{font-family:var(--f-mono);font-size:.8rem;color:var(--accent);letter-spacing:.04em}
.card-head h2{font-size:1.6rem}
.task-text{font-size:1.02rem;border-left:3px solid var(--line-strong);padding:4px 0 4px 14px;max-width:75ch}
.chips{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:.85rem;color:var(--muted)}
.chip{text-decoration:none;border:1px solid var(--line);background:var(--bg);padding:3px 10px;border-radius:999px;cursor:pointer;font-size:.84rem;color:var(--ink)}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.gf{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}
.gf > div{background:var(--bg);border-radius:8px;padding:12px 14px;min-width:0}
.gf h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-family:var(--f-body);font-weight:600;margin-bottom:6px}
.gf ul{margin:0;padding-left:1.1em;display:grid;gap:2px}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:12px;counter-reset:st}
.step{border:1px solid var(--line);border-radius:10px;padding:14px 16px;display:grid;gap:10px;counter-increment:st;min-width:0}
.step h4{display:flex;gap:10px;align-items:baseline}
.step h4::before{content:counter(st);font-family:var(--f-mono);font-size:.8rem;color:var(--accent-ink);background:var(--accent);border-radius:50%;width:22px;height:22px;display:inline-grid;place-items:center;flex:none;transform:translateY(-2px)}
.step .why{font-size:.92rem;color:var(--muted)}
.step-body{min-width:0}
.step-body > * + *{margin-top:10px}
.step-body > .prop{display:inline-grid}
.ctrl{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.ctrl .count{font-size:.88rem;color:var(--muted);margin-left:auto}
.final{background:var(--ok-soft);border-radius:10px;padding:14px 16px}
.final b:first-child{color:var(--ok);font-family:var(--f-display);display:block}
.check{border:1px dashed var(--line-strong);border-radius:10px;padding:14px 16px;display:grid;gap:10px}
.check h4{font-size:1rem}
.check .fields{display:grid;gap:8px}
.check .fld{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.check .fld label{min-width:150px;font-size:.93rem}
.check .fld input{width:150px}
.check .fld .unit{font-family:var(--f-mono);font-size:.9rem;color:var(--muted)}
.nav{display:flex;justify-content:space-between;gap:8px;border-top:1px solid var(--line);padding-top:16px}

/* balancer */
.eqpick{display:flex;flex-wrap:wrap;gap:6px}
.eqpick button{border:1px solid var(--line);background:var(--bg);border-radius:7px;padding:4px 10px;cursor:pointer;font-size:.88rem;display:flex;gap:6px;align-items:center}
.eqpick button[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft)}
.eqpick button.okk::after{content:"✓";color:var(--ok);font-weight:700}
.bal{display:grid;gap:14px}
.bal-eq{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;font-family:var(--f-mono);font-size:1.12rem;background:var(--bg);border-radius:8px;padding:14px}
.bal-eq input{width:46px;text-align:center;font-family:var(--f-mono);font-size:1rem;padding:4px}
.bal-eq .sp{display:inline-flex;align-items:center;gap:3px}
.bal-eq .op{color:var(--muted)}
.status{display:inline-flex;align-items:center;gap:6px;font-weight:600;padding:4px 12px;border-radius:999px;font-size:.9rem}
.status.ok{background:var(--ok-soft);color:var(--ok)}
.status.no{background:var(--warn-soft);color:var(--warn)}
td.good{color:var(--ok);font-weight:600}
td.badc{color:var(--bad);font-weight:600}

/* tools */
.tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:20px;align-items:start}
.tool{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:20px;display:grid;gap:12px;min-width:0}
.tool p.d{color:var(--muted);font-size:.92rem}
.tool .in{display:grid;gap:6px}
.tool label{font-size:.85rem;color:var(--muted)}
.tool .grid2{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.tool .grid2 > *{min-width:0}
.out{font-family:var(--f-mono);font-size:.93rem}
.big{font-family:var(--f-display);font-size:1.5rem;font-weight:700}
.err{color:var(--bad);font-size:.9rem}

@media (max-width:860px){
  .intro{grid-template-columns:1fr}
  .tasks{grid-template-columns:1fr}
  .tlist{position:static;max-height:none;display:flex;overflow-x:auto;gap:4px;padding-bottom:6px}
  .tlist button{grid-template-columns:auto auto;flex:none;border:1px solid var(--line);background:var(--paper)}
  .tlist button .tt{display:none}
  .progress{display:none}
  .gf{grid-template-columns:1fr}
}
@media (max-width:560px){
  .tsec{scroll-margin-top:140px}
  .tabs{margin-left:0;width:100%}
  .tab{flex:1;padding:6px 6px;font-size:.9rem}
  .intro h2{font-size:1.7rem}
  .card-head h2{font-size:1.35rem}
}
@media (prefers-reduced-motion:no-preference){
  .step{animation:fadein .25s ease}
  @keyframes fadein{from{transform:translateY(4px);opacity:.4}to{transform:none;opacity:1}}
}

html:not(.js) .js-only{display:none!important}
html.js .nojs-only{display:none!important}
.nojs-banner{background:var(--warn-soft);border-radius:10px;padding:12px 16px;margin-bottom:24px;font-size:.95rem}
.static-wrap{display:grid;gap:24px;margin-top:40px}
.static-toc{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:6px}
.static-toc a{display:flex;gap:10px;text-decoration:none;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:8px 12px;font-size:.92rem}
.static-toc a span{font-family:var(--f-mono);color:var(--muted);font-size:.82rem}
.static-task{scroll-margin-top:90px}
details.step{display:block}
details.step > summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:10px}
details.step > summary::-webkit-details-marker{display:none}
details.step > summary::after{content:"pokaż ▾";font-size:.82rem;color:var(--accent);flex:none}
details.step[open] > summary::after{content:"ukryj ▴"}
details.step[open] > summary{margin-bottom:10px}
details.final > summary{cursor:pointer;font-family:var(--f-display);font-weight:700;color:var(--ok)}
details.final[open] > summary{margin-bottom:6px}
.qc-ans summary{cursor:pointer;color:var(--accent);font-size:.9rem}
.toplink{font-size:.9rem}