:root{
  --ink:#191b1a;
  --ink-2:#63696b;
  --ink-3:#9aa0a2;
  --paper:#fff;
  --wash:#f6f7f7;
  --line:#e8eaea;
  --line-2:#d3d7d7;
  --acc:#124559;
  --acc-2:#3d7c93;
  --acc-3:#8fb4c2;
  --acc-wash:#eef4f6;
  --ok:#1d6b48;
  --bad:#9a3324;
  --warn:#7a5a12;
  --warn-wash:#fbf4e3;
  --sun:#F5B720;
  --e:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:76px}
body{
  font-family:Manrope,system-ui,sans-serif;
  background:var(--paper);color:var(--ink);
  font-size:17px;line-height:1.6;letter-spacing:-.005em;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:660px;margin:0 auto;padding:0 24px}
.tnum{font-variant-numeric:tabular-nums}
a{color:var(--acc)}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
:focus-visible{outline:2px solid var(--acc);outline-offset:3px;border-radius:4px}

.rise{opacity:0;transform:translateY(10px);animation:rise .55s var(--e) forwards}
.rise.d2{animation-delay:.07s}
@keyframes rise{to{opacity:1;transform:none}}

/* nagłówek */
.top{
  position:sticky;top:0;z-index:50;
  padding:14px 0;border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.88);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px}
.mark{
  font-weight:700;font-size:19px;letter-spacing:-.03em;
  text-decoration:none;color:var(--ink);
  display:inline-flex;align-items:center;gap:.4em;line-height:1;
}
.mark::before{
  content:"";width:.74em;height:.74em;border-radius:50%;
  background:var(--sun);flex:none;
  transition:transform .35s var(--e);
}
.mark:hover::before{transform:scale(1.14)}
.top nav{display:flex;gap:18px;font-size:14.5px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.top nav::-webkit-scrollbar{display:none}
.top nav a{white-space:nowrap}
.top nav a{color:var(--ink-2);text-decoration:none;transition:color .18s var(--e)}
.top nav a:hover,.top nav a[aria-current]{color:var(--ink)}

h1{
  font-size:clamp(30px,5.6vw,44px);font-weight:700;
  line-height:1.1;letter-spacing:-.035em;margin:40px 0 16px;
}
.lede{color:var(--ink-2);max-width:54ch;font-size:18px;margin-bottom:34px}

/* kalkulator */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:26px}
.f{display:flex;flex-direction:column}
.f label{font-size:13px;color:var(--ink-2);margin-bottom:7px;font-weight:500}
input,select{
  font:inherit;font-size:16px;color:var(--ink);width:100%;
  background:var(--paper);border:1px solid var(--line-2);
  border-radius:10px;padding:12px 13px;
  transition:border-color .18s var(--e),box-shadow .18s var(--e);
}
input:hover,select:hover{border-color:var(--ink-3)}
input:focus,select:focus{outline:none;border-color:var(--acc);box-shadow:0 0 0 3px var(--acc-wash)}
#cena{font-size:20px;font-weight:500;font-variant-numeric:tabular-nums}
select{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%2363696b' stroke-width='1.6'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 13px center;padding-right:34px}

.result{border-top:1px solid var(--line);padding-top:26px}
.big{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.big .lab{font-size:14px;color:var(--ink-2);font-weight:500}
.big .val{font-size:clamp(36px,8vw,52px);font-weight:700;letter-spacing:-.04em;line-height:1.05;font-variant-numeric:tabular-nums}
.big .pct{font-size:15px;color:var(--ink-2);padding-bottom:6px}
.big .pct b{color:var(--acc);font-weight:700;font-variant-numeric:tabular-nums}

.barlab{font-size:13px;color:var(--ink-3);margin:24px 0 8px}
.bar{display:flex;gap:3px;height:14px;margin-bottom:14px;background:var(--wash);border-radius:4px;overflow:hidden}
.bar i{display:block;height:100%;border-radius:3px;transition:width .5s var(--e);min-width:3px}
.legend{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13.5px;color:var(--ink-2);margin-bottom:28px}
.legend span{display:flex;align-items:center;gap:8px}
.legend s{width:10px;height:10px;border-radius:3px;text-decoration:none;flex:none}
.legend b{color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums}

.rows{border-top:1px solid var(--line)}
.row{display:flex;justify-content:space-between;gap:18px;padding:13px 0;border-bottom:1px solid var(--line);font-size:16px}
.row .k b{color:var(--ink);font-weight:500;display:block}
.row .k small{font-size:13px;color:var(--ink-3)}
.row .v{font-weight:500;white-space:nowrap;font-variant-numeric:tabular-nums}
.row.tot{border-bottom:none;padding-top:16px}
.row.tot .k b{font-weight:700}
.row.tot .v{font-size:19px;font-weight:700}

.tools{display:flex;gap:22px;align-items:center;margin:20px 0 54px;font-size:14px}
.tools button{color:var(--acc);font-weight:500;display:flex;align-items:center;gap:7px;transition:opacity .18s var(--e)}
.tools button:hover{opacity:.6}
.tools svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:1.7}

h2{font-size:23px;font-weight:700;letter-spacing:-.025em;margin-bottom:14px}
h3{font-size:18px;font-weight:700;letter-spacing:-.02em;margin:32px 0 10px}
section{padding-bottom:50px}

details{border-bottom:1px solid var(--line)}
details:first-of-type{border-top:1px solid var(--line)}
summary{padding:15px 0;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;font-weight:500;font-size:16.5px}
summary::-webkit-details-marker{display:none}
summary::after{content:"";width:9px;height:9px;border-right:1.6px solid var(--ink-3);border-bottom:1.6px solid var(--ink-3);transform:rotate(45deg) translateY(-3px);transition:transform .25s var(--e);flex:none}
details[open] summary::after{transform:rotate(-135deg) translateY(1px)}
details p{padding:0 0 18px;color:var(--ink-2);font-size:16px;max-width:60ch}
details[open] p{animation:fade .32s var(--e)}
@keyframes fade{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

.links{list-style:none}
.links li{border-bottom:1px solid var(--line)}
.links li:first-child{border-top:1px solid var(--line)}
.links a{display:flex;justify-content:space-between;gap:18px;padding:15px 0;text-decoration:none;font-size:16.5px;transition:padding-left .25s var(--e)}
.links a:hover{padding-left:7px}
.links em{font-style:normal;color:var(--ink-3);font-size:14px;white-space:nowrap}

/* artykuł */
article{padding-bottom:20px}
article p{margin-bottom:16px;max-width:62ch}
article ul,article ol{margin:0 0 20px 20px;max-width:60ch}
article li{margin-bottom:9px}
article strong{font-weight:700}
.meta{font-size:14px;color:var(--ink-3);margin:-6px 0 30px}
.callout{
  background:var(--acc-wash);border-radius:12px;padding:18px 20px;
  margin:26px 0;font-size:16px;color:#173f4f;max-width:62ch;
}
.callout b{display:block;font-weight:700;margin-bottom:5px;color:var(--acc)}
.callout p:last-child{margin-bottom:0}
.warnbox{
  background:var(--warn-wash);border-radius:12px;padding:18px 20px;
  margin:26px 0;font-size:16px;color:#6b4f11;max-width:62ch;
}
.warnbox b{display:block;font-weight:700;margin-bottom:5px;color:var(--warn)}
.warnbox p:last-child{margin-bottom:0}
table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15.5px}
th,td{text-align:left;padding:11px 12px 11px 0;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:500;color:var(--ink-2);font-size:13.5px}
td:last-child,th:last-child{text-align:right;padding-right:0;font-variant-numeric:tabular-nums;white-space:nowrap}

.next{background:var(--wash);border-radius:14px;padding:22px;margin-top:36px}
.next b{display:block;font-weight:700;margin-bottom:10px}
.next ul{list-style:none;margin:0}
.next li{margin-bottom:7px}
.next a{text-decoration:none;font-weight:500}
.next a:hover{text-decoration:underline}

/* lead */
.lead{background:var(--wash);border-radius:16px;padding:28px}
.lead h2{margin-bottom:8px}
.lead>p{color:var(--ink-2);font-size:16px;max-width:48ch;margin-bottom:20px}
.lead input,.lead select{background:var(--paper)}
.send{
  background:var(--ink);color:#fff;border-radius:10px;padding:14px;
  font-size:16px;font-weight:500;width:100%;
  transition:transform .12s var(--e),background .18s var(--e);
}
.send:hover{background:#000}
.send:active{transform:scale(.985)}
.msg{margin-top:12px;font-size:14.5px;min-height:21px}
.msg.bad{color:var(--bad)}
.msg.good{color:var(--ok)}
.fine{margin-top:14px;font-size:13px;color:var(--ink-3);line-height:1.55}

footer{border-top:1px solid var(--line);padding:28px 0 64px;font-size:13px;color:var(--ink-3);line-height:1.7;margin-top:40px}
footer a{color:var(--ink-2)}
.fnav{display:flex;flex-wrap:wrap;gap:8px 20px;margin-bottom:16px;font-size:14px}
.fnav a{color:var(--ink-2);text-decoration:none;transition:color .18s var(--e)}
.fnav a:hover{color:var(--ink);text-decoration:underline}
.fbot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:16px;margin-top:18px}

@media (max-width:600px){
  .grid{grid-template-columns:1fr}
  h1{margin-top:30px}
  .top{padding:11px 0}
  .mark{font-size:17px}
  .top nav{gap:15px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .rise{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* --- ikony Lucide (ISC), wklejone jako maski --- */
.callout b,.warnbox b{display:flex;align-items:center;gap:8px}
.callout b::before,.warnbox b::before{
  content:"";width:19px;height:19px;flex:none;
  background:currentColor;
  -webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;
  -webkit-mask-size:contain;mask-size:contain;
}
.callout b::before{
  -webkit-mask-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpath d='M12 16v-4M12 8h.01'/%3E%3C/svg%3E");
  mask-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpath d='M12 16v-4M12 8h.01'/%3E%3C/svg%3E");
}
.warnbox b::before{
  -webkit-mask-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3'/%3E%3Cpath d='M12 9v4M12 17h.01'/%3E%3C/svg%3E");
  mask-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3'/%3E%3Cpath d='M12 9v4M12 17h.01'/%3E%3C/svg%3E");
}
.next a,.links a{position:relative}
.next a::before,.next li{display:inline}
.next li{display:flex;align-items:center;gap:8px}
.next li::before{
  content:"";width:16px;height:16px;flex:none;background:var(--acc);
  -webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-size:contain;mask-size:contain;
  -webkit-mask-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14M12 5l7 7-7 7'/%3E%3C/svg%3E");
  mask-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14M12 5l7 7-7 7'/%3E%3C/svg%3E");
  transition:transform .25s var(--e);
}
.next li:hover::before{transform:translateX(3px)}
.links a::after{
  content:"";width:15px;height:15px;flex:none;align-self:center;background:var(--ink-3);
  -webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-size:contain;mask-size:contain;
  -webkit-mask-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m9 18 6-6-6-6'/%3E%3C/svg%3E");
  mask-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m9 18 6-6-6-6'/%3E%3C/svg%3E");
  transition:transform .25s var(--e),background .25s var(--e);
}
.links a:hover::after{background:var(--acc);transform:translateX(3px)}
.links em{margin-left:auto}