/* Oblicz.cloud — własny motyw */
:root{
  --bg:#F5F6F1;
  --surface:#FFFFFF;
  --ink:#152B22;
  --ink-soft:#41544A;
  --muted:#6B7D72;
  --line:#E2E7DE;
  --brand:#0E6E4E;
  --brand-dark:#0A523A;
  --brand-soft:#E4F1EA;
  --accent:#D97E29;
  --accent-soft:#FBF0E2;
  --danger:#B23A2E;
  --radius:14px;
  --shadow:0 1px 3px rgba(21,43,34,.06),0 8px 24px rgba(21,43,34,.07);
  --font:"Plus Jakarta Sans","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.65;font-size:16px}
img,svg{max-width:100%}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1080px;margin:0 auto;padding:0 20px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(245,246,241,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:28px;height:64px}
.logo{font-weight:800;font-size:20px;color:var(--ink);letter-spacing:-.3px;display:flex;align-items:center;gap:9px}
.logo:hover{text-decoration:none}
.logo .mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:800}
.logo .tld{color:var(--accent)}
.main-nav{display:flex;gap:4px;margin-left:auto}
.main-nav a{padding:8px 12px;border-radius:9px;color:var(--ink-soft);font-weight:600;font-size:14.5px}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand-dark);text-decoration:none}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:9px;padding:8px 10px;font-size:16px;cursor:pointer}

/* ---------- Breadcrumb ---------- */
.crumbs{font-size:13.5px;color:var(--muted);padding:18px 0 0}
.crumbs a{color:var(--muted)}
.crumbs span{color:var(--ink-soft)}

/* ---------- Hero ---------- */
.hero{padding:44px 0 8px}
.hero h1{font-size:clamp(28px,4.5vw,40px);line-height:1.15;letter-spacing:-.8px;font-weight:800}
.hero .lead{margin-top:14px;font-size:17px;color:var(--ink-soft);max-width:720px}
.meta-line{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.chip{display:inline-flex;align-items:center;gap:6px;background:var(--brand-soft);color:var(--brand-dark);border-radius:999px;padding:5px 13px;font-size:13px;font-weight:700}
.chip.amber{background:var(--accent-soft);color:#8A4E12}

/* ---------- Calc cards grid ---------- */
.cat-section{padding:34px 0 6px}
.cat-section h2{font-size:23px;letter-spacing:-.4px;display:flex;align-items:center;gap:10px}
.cat-section .cat-desc{color:var(--muted);font-size:15px;margin-top:4px;max-width:700px}
.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;margin-top:18px}
.calc-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;gap:8px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;position:relative}
.calc-card:hover{transform:translateY(-2px);box-shadow:0 2px 4px rgba(21,43,34,.06),0 12px 30px rgba(21,43,34,.11);text-decoration:none}
.calc-card .icon{width:40px;height:40px;border-radius:11px;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;font-size:20px}
.calc-card h3{font-size:16.5px;color:var(--ink);letter-spacing:-.2px}
.calc-card p{font-size:14px;color:var(--muted);flex-grow:1}
.calc-card .go{color:var(--brand);font-weight:700;font-size:14px}

/* ---------- Calculator widget ---------- */
.calculator{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin:26px 0;overflow:hidden}
.calc-head{background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;padding:18px 24px;display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px}
.calc-body{display:grid;grid-template-columns:1.1fr .9fr;gap:0}
.calc-form{padding:24px;border-right:1px solid var(--line)}
.field{margin-bottom:16px}
.field label{display:block;font-weight:700;font-size:14px;margin-bottom:6px;color:var(--ink)}
.field .hint{font-size:12.5px;color:var(--muted);margin-top:4px}
.field input[type=number],.field input[type=text],.field input[type=date],.field select{width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:10px;font:inherit;font-size:15px;background:#FBFCFA;color:var(--ink)}
.field input:focus,.field select:focus{outline:none;border-color:var(--brand);background:#fff}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.check{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;margin-bottom:10px;cursor:pointer;background:#FBFCFA}
.check:hover{border-color:var(--brand)}
.check input{margin-top:3px;accent-color:var(--brand);width:16px;height:16px}
.check .t{font-weight:700;font-size:14px}
.check .d{font-size:12.5px;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brand);color:#fff;border:none;border-radius:10px;padding:13px 22px;font:inherit;font-weight:700;font-size:15.5px;cursor:pointer;width:100%;transition:background .15s}
.btn:hover{background:var(--brand-dark)}
.calc-results{padding:24px;background:#FAFBF7;display:flex;flex-direction:column}
.calc-results .placeholder{color:var(--muted);font-size:14.5px;margin:auto;text-align:center;padding:30px 10px}
.result-main{background:var(--brand-soft);border-radius:12px;padding:18px;text-align:center;margin-bottom:14px}
.result-main .lbl{font-size:13px;font-weight:700;color:var(--brand-dark);text-transform:uppercase;letter-spacing:.5px}
.result-main .val{font-size:34px;font-weight:800;color:var(--brand-dark);letter-spacing:-1px;margin-top:2px}
.res-row{display:flex;justify-content:space-between;gap:12px;padding:9px 2px;border-bottom:1px dashed var(--line);font-size:14.5px}
.res-row:last-child{border-bottom:none}
.res-row .k{color:var(--muted)}
.res-row .v{font-weight:700;text-align:right}
.res-note{margin-top:12px;font-size:12.5px;color:var(--muted);background:#fff;border:1px solid var(--line);border-radius:9px;padding:10px 12px}
.badge-up,.badge-down{display:inline-block;border-radius:999px;padding:2px 10px;font-size:12px;font-weight:800}
.badge-up{background:#FBE7E4;color:var(--danger)}
.badge-down{background:var(--brand-soft);color:var(--brand-dark)}

/* ---------- Article ---------- */
article.page-content{padding:10px 0 40px;max-width:820px}
article.page-content h2{font-size:22px;margin:34px 0 12px;letter-spacing:-.4px;padding-top:6px}
article.page-content h3{font-size:17px;margin:22px 0 8px}
article.page-content p{margin:10px 0;color:var(--ink-soft)}
article.page-content ul,article.page-content ol{margin:10px 0 10px 22px;color:var(--ink-soft)}
article.page-content li{margin:6px 0}
article.page-content strong{color:var(--ink)}
.formula{background:#F0F4EE;border-left:4px solid var(--brand);border-radius:0 10px 10px 0;padding:14px 18px;margin:16px 0;font-size:15px}
.formula b{color:var(--brand-dark)}
table.data{width:100%;border-collapse:collapse;margin:16px 0;font-size:14.5px;background:var(--surface);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
table.data th{background:var(--brand);color:#fff;text-align:left;padding:11px 14px;font-weight:700}
table.data td{padding:10px 14px;border-bottom:1px solid var(--line);color:var(--ink-soft)}
table.data tr:last-child td{border-bottom:none}
table.data tr:nth-child(even) td{background:#FAFBF7}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:15px 18px;font-weight:700;font-size:15.5px;list-style:none;display:flex;justify-content:space-between;gap:10px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--accent);font-weight:800;font-size:18px}
.faq-item[open] summary::after{content:"–"}
.faq-item .a{padding:0 18px 16px;color:var(--ink-soft);font-size:14.5px}
.tip-box{background:var(--accent-soft);border:1px solid #EFD9BC;border-radius:12px;padding:16px 18px;margin:16px 0;font-size:14.5px;color:#5C3A10}
.sources{margin-top:28px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.disclaimer{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:13px;color:var(--muted);margin-top:24px}

/* ---------- Footer ---------- */
.site-footer{background:#10231B;color:#C9D6CD;margin-top:50px;padding:40px 0 28px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px}
.site-footer h4{color:#fff;font-size:14px;margin-bottom:10px;letter-spacing:.3px}
.site-footer a{color:#C9D6CD;display:block;padding:3px 0}
.site-footer a:hover{color:#fff}
.footer-bottom{margin-top:28px;padding-top:18px;border-top:1px solid #24402F;color:#8FA79A;font-size:12.5px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- Related ---------- */
.related{margin-top:36px}
.related h2{font-size:20px;margin-bottom:14px}
.related .calc-grid{margin-top:0}

@media(max-width:820px){
  .calc-body{grid-template-columns:1fr}
  .calc-form{border-right:none;border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--line);flex-direction:column;padding:10px 20px}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
}
@media(max-width:520px){
  .field-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}