/* Kalkulatorek – style. Jasny motyw domyślnie, ciemny przez [data-theme=dark]. */
:root {
  --bg: #fff; --surface: #f5f8fc; --sidebar: #fafcff; --border: #e2e8f0; --text: #0f1b2d; --muted: #566579;
  --primary: #1b5fd0; --primary-h: #144bb0; --on-primary: #fff; --accent: #0f9d63; --accent-bg: #e8f7f0; --primary-bg: #eaf1fd;
  --err: #b42318; --err-bg: #fef0ee; --shadow: 0 1px 2px rgba(15,27,45,.06), 0 4px 16px rgba(15,27,45,.05);
  --c0: #1b5fd0; --c1: #0f9d63;
  --sb: 276px; --radius: 14px;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0c1320; --surface: #121b2b; --sidebar: #0f1827; --border: #25324a; --text: #e8eef8; --muted: #9aa9bf;
  --primary: #6fa3ff; --primary-h: #8fb6ff; --on-primary: #08111f; --accent: #3fd99b; --accent-bg: #10281f; --primary-bg: #14233d;
  --err: #ff8a7a; --err-bg: #2c1714; --shadow: none; --c0: #6fa3ff; --c1: #3fd99b;
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.65 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
a { color: var(--primary); text-underline-offset: 3px; }
a:hover { color: var(--primary-h); }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary) 55%, transparent); outline-offset: 2px; border-radius: 6px; }
.ico { width: 20px; height: 20px; flex: none; }
.skip { position: absolute; left: -999px; top: 0; background: var(--primary); color: var(--on-primary); padding: 8px 14px; z-index: 100; }
.skip:focus { left: 8px; top: 8px; }
.muted { color: var(--muted); }

/* ---------- układ ---------- */
.shell { display: block; }
.sidebar { position: fixed; inset: 0 auto 0 0; width: var(--sb); background: var(--sidebar); border-right: 1px solid var(--border); display: flex; flex-direction: column; z-index: 40; }
.brand { display: flex; align-items: center; gap: 12px; padding: 20px 20px 14px; text-decoration: none; color: var(--text); }
.brand:hover { color: var(--text); }
.brand-mark { width: 38px; height: 38px; border-radius: 11px; background: linear-gradient(135deg, var(--primary), var(--accent)); display: grid; place-items: center; color: #fff; flex: none; }
.brand-mark svg { width: 22px; height: 22px; }
.brand b { font-size: 20px; letter-spacing: -.02em; display: block; line-height: 1.1; }
.brand small { color: var(--muted); font-size: 12.5px; }
.nav { flex: 1; overflow-y: auto; padding: 4px 12px 16px; overscroll-behavior: contain; }
.nav h2 { font-size: 11.5px; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); margin: 18px 10px 6px; font-weight: 700; }
.nav a { display: flex; align-items: center; gap: 11px; padding: 8px 10px; border-radius: 9px; color: var(--text); text-decoration: none; font-size: 15.5px; line-height: 1.3; }
.nav a:hover { background: var(--primary-bg); }
.nav a[aria-current="page"] { background: var(--primary-bg); color: var(--primary); font-weight: 650; }
.nav a .ico { color: var(--muted); }
.nav a[aria-current="page"] .ico { color: var(--primary); }
.side-foot { padding: 12px 16px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.icon-btn { background: none; border: 1px solid var(--border); color: var(--text); border-radius: 10px; width: 40px; height: 40px; display: inline-grid; place-items: center; cursor: pointer; }
.icon-btn:hover { background: var(--primary-bg); }
.topbar { display: none; }

.main { margin-left: var(--sb); min-height: 100vh; display: flex; flex-direction: column; }
.page { flex: 1; width: 100%; max-width: 1240px; margin: 0 auto; padding: 28px 28px 8px; }
.page-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 32px; align-items: start; }
.col-ad { display: none; }
@media (min-width: 1240px) {
  .page-grid { grid-template-columns: minmax(0, 1fr) 300px; }
  .col-ad { display: block; position: sticky; top: 24px; }
}
.col-main { min-width: 0; max-width: 820px; }
.crumbs { font-size: 14px; color: var(--muted); margin: 0 0 10px; }
.crumbs a { color: var(--muted); }
h1 { font-size: clamp(28px, 4vw, 38px); line-height: 1.15; letter-spacing: -.025em; margin: 0 0 10px; }
.lead { color: var(--muted); font-size: 18px; margin: 0 0 22px; max-width: 62ch; }

/* ---------- reklamy ---------- */
.ad { margin: 24px 0; text-align: center; contain: layout; }
.ad-label { display: block; font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.ad-slot { display: block; width: 100%; background: var(--surface); border: 1px dashed var(--border); border-radius: 10px; overflow: hidden; }
.ad-slot ins { display: block; width: 100%; min-height: inherit; }
.ad-ph { height: 100%; display: grid; place-items: center; color: var(--muted); font-size: 13px; }
.ad-banner .ad-slot { min-height: 120px; }
.ad-article .ad-slot { min-height: 280px; }
.ad-side .ad-slot { min-height: 600px; }
.ad-foot .ad-slot { min-height: 120px; }
@media (max-width: 760px) { .ad-banner .ad-slot, .ad-foot .ad-slot { min-height: 280px; } }

/* ---------- karta kalkulatora ---------- */
.card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 18px; }
.field.full, .field-seg { grid-column: 1 / -1; }
.field label { display: block; font-weight: 600; font-size: 15px; margin-bottom: 6px; }
.field small { display: block; color: var(--muted); font-size: 13px; margin-top: 5px; line-height: 1.4; }
.inp { position: relative; }
input[type=text], input[type=date], select { width: 100%; height: 50px; font: inherit; font-size: 18px; color: var(--text); background: var(--bg); border: 1.5px solid var(--border); border-radius: 11px; padding: 0 14px; transition: border-color .15s, box-shadow .15s; }
select { font-size: 16px; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%23778' stroke-width='2'%3E%3Cpath d='m1 1 5 5 5-5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 38px; }
.inp input { padding-right: 64px; }
input:hover, select:hover { border-color: color-mix(in srgb, var(--primary) 40%, var(--border)); }
input:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 18%, transparent); }
.sfx { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 14px; pointer-events: none; max-width: 56px; white-space: nowrap; overflow: hidden; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; background: var(--surface); padding: 5px; border-radius: 12px; border: 1px solid var(--border); }
.seg button { flex: 1 1 auto; font: inherit; font-size: 15px; font-weight: 600; padding: 9px 12px; border: 0; background: none; color: var(--muted); border-radius: 8px; cursor: pointer; }
.seg button:hover { color: var(--text); }
.seg button.on { background: var(--bg); color: var(--primary); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.btn { display: inline-flex; align-items: center; gap: 8px; font: inherit; font-size: 14.5px; font-weight: 600; padding: 9px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg); color: var(--text); cursor: pointer; }
.btn:hover { background: var(--primary-bg); border-color: color-mix(in srgb, var(--primary) 40%, var(--border)); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.btn.primary:hover { background: var(--primary-h); }
.btn .ico { width: 17px; height: 17px; }
.link-btn { background: none; border: 0; color: var(--primary); font: inherit; font-size: 14px; cursor: pointer; text-decoration: underline; padding: 6px 0 0; }

.result { margin-top: 22px; min-height: 120px; }
.res-main { background: linear-gradient(135deg, var(--primary-bg), var(--accent-bg)); border: 1px solid color-mix(in srgb, var(--primary) 22%, var(--border)); border-radius: 14px; padding: 18px 20px; }
.res-label { display: block; color: var(--muted); font-size: 15px; font-weight: 600; }
.res-value { display: block; font-size: clamp(28px, 5vw, 40px); line-height: 1.15; letter-spacing: -.02em; color: var(--text); margin-top: 4px; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.res-list { margin: 14px 0 0; display: grid; gap: 0; }
.res-list > div { display: flex; justify-content: space-between; gap: 16px; padding: 10px 2px; border-bottom: 1px solid var(--border); font-size: 16px; }
.res-list dt { color: var(--muted); }
.res-list dd { margin: 0; font-weight: 650; text-align: right; font-variant-numeric: tabular-nums; }
.res-note { font-size: 14px; color: var(--muted); margin: 12px 0 0; }
.res-err { background: var(--surface); border: 1px dashed var(--border); color: var(--muted); padding: 18px; border-radius: 12px; }
.chart { margin: 18px 0 0; }
.chart figcaption { font-size: 14px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
.chart svg { width: 100%; height: auto; display: block; }
.chart .grid { stroke: var(--border); stroke-width: 1; }
.chart .tick { fill: var(--muted); font-size: 11.5px; }
.bar.c0, .sw.c0 { fill: var(--c0); background: var(--c0); }
.bar.c1, .sw.c1 { fill: var(--c1); background: var(--c1); }
.legend { list-style: none; display: flex; gap: 18px; padding: 0; margin: 8px 0 0; font-size: 14px; color: var(--muted); }
.sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
details.tbl, details.hist { margin-top: 16px; border: 1px solid var(--border); border-radius: 12px; }
details > summary { cursor: pointer; padding: 12px 16px; font-weight: 650; font-size: 15.5px; list-style-position: inside; }
.tbl-wrap { max-height: 420px; overflow: auto; border-top: 1px solid var(--border); }
table { border-collapse: collapse; width: 100%; font-size: 15px; font-variant-numeric: tabular-nums; }
th, td { padding: 9px 14px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { position: sticky; top: 0; background: var(--surface); font-size: 13.5px; }
.r { text-align: right; }
details.hist { padding-bottom: 12px; }
details.hist ul { list-style: none; margin: 0; padding: 0 16px; font-size: 14.5px; }
details.hist li { padding: 7px 0; border-bottom: 1px solid var(--border); }
details.hist .link-btn { margin: 0 16px; }

/* ---------- artykuł SEO ---------- */
.article { margin-top: 36px; }
.article h2 { font-size: 26px; line-height: 1.25; letter-spacing: -.015em; margin: 38px 0 12px; }
.article h3 { font-size: 19px; margin: 24px 0 8px; }
.article p, .article li { max-width: 70ch; }
.article ol, .article ul { padding-left: 24px; }
.article li { margin: 6px 0; }
.formula { background: var(--surface); border-left: 4px solid var(--primary); border-radius: 0 10px 10px 0; padding: 14px 18px; margin: 14px 0; }
.formula .eq { font: italic 20px/1.5 "Cambria Math", Cambria, "STIX Two Math", Georgia, serif; overflow-x: auto; }
.formula p { margin: 6px 0 0; font-size: 15.5px; color: var(--muted); }
.example { border: 1px solid var(--border); border-radius: 12px; padding: 4px 18px 8px; margin: 14px 0; background: var(--bg); }
.example h3 { margin: 12px 0 4px; }
.table-scroll { overflow-x: auto; margin: 14px 0; border: 1px solid var(--border); border-radius: 12px; }
.table-scroll table { font-size: 15px; }
.table-scroll caption { text-align: left; padding: 12px 14px; font-weight: 650; }
.faq details { border: 1px solid var(--border); border-radius: 12px; margin: 10px 0; }
.faq summary { font-weight: 650; }
.faq details p { margin: 0; padding: 0 16px 14px; }
.related { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; padding: 0; list-style: none; }
.related a { display: flex; gap: 10px; align-items: center; padding: 12px 14px; border: 1px solid var(--border); border-radius: 12px; text-decoration: none; color: var(--text); font-weight: 600; font-size: 15.5px; }
.related a:hover { background: var(--primary-bg); }
.updated { color: var(--muted); font-size: 14px; margin-top: 30px; }

/* ---------- strona główna ---------- */
.hero { background: linear-gradient(135deg, var(--primary-bg), var(--accent-bg)); border: 1px solid var(--border); border-radius: 18px; padding: 32px; margin-bottom: 28px; }
.hero h1 { margin-bottom: 12px; }
.hero p { max-width: 60ch; font-size: 18px; color: var(--muted); margin: 0; }
.grid-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; margin-bottom: 8px; }
.tile { display: flex; gap: 12px; padding: 16px; border: 1px solid var(--border); border-radius: 14px; text-decoration: none; color: var(--text); background: var(--bg); }
.tile:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.tile .ico { width: 24px; height: 24px; color: var(--primary); margin-top: 2px; }
.tile b { display: block; font-size: 16px; line-height: 1.3; }
.tile span { display: block; font-size: 13.5px; color: var(--muted); line-height: 1.4; margin-top: 3px; }
.prose { max-width: 72ch; }
.prose h2 { font-size: 24px; margin: 32px 0 10px; }
.prose h3 { font-size: 18px; margin: 22px 0 6px; }
.todo { background: #fff8db; color: #5b4a00; padding: 1px 6px; border-radius: 4px; }
:root[data-theme="dark"] .todo { background: #3b3200; color: #ffe58a; }

/* ---------- stopka, cookies, toast ---------- */
.footer { border-top: 1px solid var(--border); background: var(--surface); margin-top: 24px; padding: 28px; }
.footer-in { max-width: 1240px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 14px 28px; justify-content: space-between; font-size: 14.5px; color: var(--muted); }
.footer nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.footer nav a { color: var(--text); }
.footer p { margin: 0; max-width: 60ch; }
.page-ad-wrap { max-width: 1240px; margin: 0 auto; padding: 0 28px; width: 100%; }
.cookie { position: fixed; left: calc(var(--sb) + 16px); right: 16px; bottom: 16px; z-index: 60; background: var(--bg); border: 1px solid var(--border); box-shadow: 0 10px 40px rgba(0,0,0,.2); border-radius: 16px; padding: 18px 20px; max-width: 760px; font-size: 15px; }
.cookie h2 { margin: 0 0 6px; font-size: 17px; }
.cookie p { margin: 0 0 12px; color: var(--muted); }
.cookie .opts { display: grid; gap: 8px; margin: 0 0 12px; }
.cookie label { display: flex; gap: 10px; align-items: flex-start; }
.cookie .row { display: flex; flex-wrap: wrap; gap: 8px; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); background: #0f1b2d; color: #fff; padding: 10px 18px; border-radius: 999px; font-size: 14.5px; opacity: 0; pointer-events: none; transition: .2s; z-index: 80; }
.toast.on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- mobile ---------- */
@media (max-width: 959px) {
  .topbar { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 10px; padding: 8px 14px; background: var(--bg); border-bottom: 1px solid var(--border); }
  .topbar .brand { padding: 0; flex: 1; }
  .topbar .brand-mark { width: 32px; height: 32px; }
  .topbar .brand b { font-size: 18px; }
  .topbar .brand small { display: none; }
  .sidebar { width: 100%; transform: translateX(-100%); visibility: hidden; transition: transform .22s ease, visibility .22s; }
  .sidebar.open { transform: none; visibility: visible; }
  .sidebar .close { display: inline-grid; }
  .sidebar .brand { padding-right: 70px; }
  .side-close { position: absolute; right: 14px; top: 16px; }
  .nav a { padding: 12px 12px; font-size: 17px; }
  .main { margin-left: 0; }
  .page { padding: 20px 16px 4px; }
  .page-ad-wrap { padding: 0 16px; }
  .card { padding: 16px; }
  .fields { grid-template-columns: 1fr; }
  .cookie { left: 12px; right: 12px; bottom: 12px; }
  .footer { padding: 22px 16px; }
}
@media (min-width: 960px) { .side-close { display: none; } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }

/* ---------- druk ---------- */
@media print {
  .sidebar, .topbar, .ad, .col-ad, .footer, .cookie, .actions, .article, .hist, .toast, .page-ad-wrap, .crumbs { display: none !important; }
  .main { margin: 0; }
  .page { padding: 0; max-width: none; }
  .card { border: 0; box-shadow: none; padding: 0; }
  body { font-size: 12pt; color: #000; background: #fff; }
  .res-main { background: none; border: 1px solid #000; }
  details.tbl { border: 0; } details.tbl[open] .tbl-wrap, .tbl-wrap { max-height: none; overflow: visible; }
  .lead::after { content: "Źródło: kalkulatorek – wynik obliczony w przeglądarce."; display: block; font-size: 10pt; margin-top: 6px; }
}

/* ---------- rozszerzenia: wyszukiwarka, grupy menu, textarea, losowanie ---------- */
.nav-search { padding: 0 12px 8px; }
.nav-search label { position: relative; display: block; }
.nav-search .ico { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; color: var(--muted); pointer-events: none; }
.nav-search input { width: 100%; height: 40px; font: inherit; font-size: 15px; color: var(--text); background: var(--bg); border: 1.5px solid var(--border); border-radius: 10px; padding: 0 12px 0 36px; }
.nav-search input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent); }
.nav details.ng > summary { list-style: none; cursor: pointer; font-size: 11.5px; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); margin: 14px 10px 4px; font-weight: 700; display: flex; justify-content: space-between; align-items: center; }
.nav details.ng > summary::-webkit-details-marker { display: none; }
.nav details.ng > summary::after { content: "▾"; font-size: 12px; transition: transform .15s; }
.nav details.ng:not([open]) > summary::after { transform: rotate(-90deg); }
.nav .no-hit { padding: 10px 12px; color: var(--muted); font-size: 14.5px; }
textarea { width: 100%; font: inherit; font-size: 16px; line-height: 1.55; color: var(--text); background: var(--bg); border: 1.5px solid var(--border); border-radius: 11px; padding: 12px 14px; resize: vertical; min-height: 140px; }
textarea:focus, input[data-free]:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent); }
input[data-free] { width: 100%; height: 50px; font: inherit; font-size: 18px; color: var(--text); background: var(--bg); border: 1.5px solid var(--border); border-radius: 11px; padding: 0 14px; }
.field-roll .btn { font-size: 17px; padding: 13px 22px; }
.balls { display: flex; flex-wrap: wrap; gap: 10px; margin: 6px 0 4px; }
.ball { width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; font-weight: 750; font-size: 18px; color: #fff; background: linear-gradient(135deg, var(--c0), var(--c1)); box-shadow: var(--shadow); }
.hero-search { margin-top: 18px; max-width: 520px; position: relative; }
.hero-search .ico { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--muted); }
.hero-search input { width: 100%; height: 54px; font: inherit; font-size: 18px; color: var(--text); background: var(--bg); border: 1.5px solid var(--border); border-radius: 14px; padding: 0 16px 0 46px; }
.hero-search input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent); }
.tile.hot { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); background: var(--accent-bg); }
.badge { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; background: var(--accent); color: #fff; border-radius: 6px; padding: 1px 7px; margin-left: 6px; vertical-align: middle; }
.ad-home .ad-slot, .ad-faq .ad-slot { min-height: 280px; }
.ad-home, .ad-faq { grid-column: 1 / -1; }
.src-note { font-size: 14px; color: var(--muted); }