:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #1c2431;
  --muted: #5b6676;
  --brand: #0b3d6e;
  --brand-2: #1d4f86;
  --accent: #0e7c5b;
  --accent-bg: #e9f6f1;
  --accent-line: #b9e0cf;
  --line: #dde3ec;
  --info-bg: #eef4fb;
  --warn-bg: #fff6e8;
  --warn-border: #d97706;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 32, 56, 0.06), 0 6px 20px rgba(16, 32, 56, 0.06);
  --font-body: "Open Sans", system-ui, -apple-system, "Segoe UI", "Liberation Sans", sans-serif;
  --font-head: Georgia, "Times New Roman", "Liberation Serif", serif;
  --font-mono: ui-monospace, "DejaVu Sans Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* Nagłówek */

header.site {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
  color: #fff;
  border-bottom: 3px solid var(--accent);
}

header.site .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
}

header.site .logo {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
  text-decoration: none;
}

header.site .logo::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-right: 10px;
  border-radius: 50%;
  background: #6fd9b0;
}

header.site nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

header.site nav a {
  color: #dbe7f5;
  text-decoration: none;
  font-size: 0.95rem;
  padding: 6px 12px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}

header.site nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

/* Działy na stronie głównej */

.dzialy {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 14px;
  margin: 18px 0 8px;
}

.dzial-kafel {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border-radius: 10px;
  border-top: 4px solid #1d3f66;
  box-shadow: 0 2px 8px rgba(29, 63, 102, 0.08);
  padding: 14px 16px;
  color: #1d3f66;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.dzial-kafel:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(29, 63, 102, 0.15);
}

.dzial-ikona {
  flex: none;
  width: 56px;
  height: 56px;
}

.dzial-tekst {
  display: block;
  min-width: 0;
}

.dzial-tekst strong {
  display: block;
  font-size: 1.02rem;
  line-height: 1.3;
  margin-bottom: 3px;
}

.dzial-tekst > span {
  display: block;
  color: #5a6b7d;
  font-size: 0.88rem;
}

.dzial {
  scroll-margin-top: 16px;
}

.dzial-opis {
  color: #5a6b7d;
  margin: -6px 0 12px;
}

/* Rozwijane menu kategorii */

header.site nav .dd {
  position: relative;
}

header.site nav .dd ul {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 10;
  min-width: 280px;
  margin: 0;
  padding: 6px 0;
  list-style: none;
  background: #1d3f66;
  border-radius: 6px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}

header.site nav .dd:hover ul,
header.site nav .dd:focus-within ul {
  display: block;
}

header.site nav .dd ul a {
  display: block;
  padding: 6px 14px;
  font-size: 0.9rem;
  white-space: nowrap;
}

/* Układ */

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px;
}

main { padding: 36px 0 64px; }

/* Typografia */

h1, h2, h3 { text-wrap: balance; }

h1 {
  font-family: var(--font-head);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--brand);
  margin: 0 0 12px;
}

h2 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  line-height: 1.3;
  color: var(--brand);
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  margin: 40px 0 14px;
}

h3 {
  font-size: 1.1rem;
  color: var(--brand-2);
  margin: 26px 0 8px;
}

p, li { margin: 8px 0; }

ul, ol { padding-left: 22px; }

li { margin: 6px 0; }

a {
  color: var(--brand-2);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover { color: var(--accent); }

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 6px;
}

/* Artykuł: treść w jednej, czytelnej karcie */

article.wrap {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px 44px;
}

article > .meta {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-bg);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 16px;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.lead {
  font-size: 1.12rem;
  color: var(--muted);
  padding-bottom: 22px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
}

/* Bloki informacyjne */

.box,
.warn {
  padding: 16px 20px;
  margin: 22px 0;
  border-radius: 8px;
  border-left: 4px solid;
}

.box {
  background: var(--info-bg);
  border-left-color: var(--brand-2);
}

.box code {
  display: block;
  white-space: pre-wrap;
  overflow-x: auto;
  font-size: 1rem;
  padding: 10px 14px;
  margin-bottom: 10px;
}

.box code + br { display: none; }

.warn {
  background: var(--warn-bg);
  border-left-color: var(--warn-border);
}

/* Tabele */

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 14px 0 22px;
  font-size: 0.95rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

th {
  background: var(--info-bg);
  color: var(--brand);
  text-align: left;
  font-weight: 700;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}

td {
  border-bottom: 1px solid var(--line);
  padding: 10px 14px;
  vertical-align: top;
}

tr:last-child td { border-bottom: 0; }

/* Karty na stronie głównej */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
  margin: 24px 0;
}

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand-2);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 22px;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--brand-2);
  box-shadow: 0 10px 24px rgba(11, 61, 110, 0.12);
}

.card .tag {
  display: inline-block;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-bg);
  font-weight: 700;
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 10px;
}

.card h3 { margin: 0 0 6px; color: var(--brand); }

.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* Kalkulator */

.calc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin: 22px 0 28px;
}

.calc .row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
}

.calc label {
  display: flex;
  align-items: flex-end;
  min-height: 2.6em;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--muted);
  margin-bottom: 6px;
}

.calc input {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: #fbfcfe;
  border: 1px solid #c4cedb;
  border-radius: 8px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.calc input:focus {
  outline: none;
  border-color: var(--brand-2);
  box-shadow: 0 0 0 3px rgba(29, 79, 134, 0.18);
}

.calc button {
  margin-top: 18px;
  background: var(--brand);
  color: #fff;
  border: 0;
  padding: 11px 22px;
  font: inherit;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
}

.calc button:hover { background: var(--brand-2); }

.calc button:focus-visible {
  outline: 3px solid rgba(29, 79, 134, 0.35);
  outline-offset: 2px;
}

/* Wynik: lista pozycji z wyróżnionym kosztem */

.result {
  display: grid;
  grid-template-columns: 1fr auto;
  margin: 20px 0 0;
  background: var(--accent-bg);
  border: 1px solid var(--accent-line);
  border-radius: 8px;
  overflow: hidden;
}

.result dt,
.result dd {
  margin: 0;
  padding: 11px 16px;
  border-bottom: 1px solid var(--accent-line);
}

.result dt {
  color: var(--muted);
  font-size: 0.95rem;
}

.result dd {
  font-weight: 700;
  text-align: right;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.result dt:last-of-type,
.result dd:last-of-type {
  border-bottom: 0;
  background: var(--card);
}

.result dt:last-of-type {
  color: var(--brand);
  font-weight: 700;
}

.result dd:last-of-type {
  color: var(--accent);
  font-size: 1.2rem;
}

.result + .meta {
  margin: 12px 0 0;
  font-size: 0.85rem;
}

/* Stopka */

footer.site {
  background: #0b2a4a;
  color: #b9c7d8;
  font-size: 0.88rem;
  padding: 26px 0;
}

footer.site a {
  color: #dbe7f5;
  text-decoration: underline;
  text-underline-offset: 3px;
}

footer.site a:hover { color: #fff; }

/* Telefony */

@media (max-width: 600px) {
  h1 { font-size: 1.65rem; }
  h2 { font-size: 1.22rem; margin-top: 32px; }
  main { padding: 24px 0 48px; }
  article.wrap { margin: 0 12px; padding: 24px 20px; }
  header.site nav a { padding: 6px 8px; }
  th, td { padding: 8px 10px; font-size: 0.9rem; }
  .calc { padding: 18px; }
}