:root {
  --paper: #f6f2ea;
  --card: #fffdf8;
  --ink: #2a2622;
  --muted: #6f675d;
  --line: #e2dacb;
  --accent: #2f6b5a;
  --accent-ink: #ffffff;
  --accent-soft: #e3efe9;
  --warn: #9a5b12;
  --warn-soft: #fbefdc;
  --danger: #a33a2c;
  --key: #6a4c93;
  --key-soft: #efe8f7;
  --shadow: 0 1px 2px rgba(60, 45, 20, .06), 0 4px 16px rgba(60, 45, 20, .06);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1c1a17; --card: #25221e; --ink: #ece6dc; --muted: #a39a8d;
    --line: #3a352e; --accent: #6fbfa5; --accent-ink: #10201b; --accent-soft: #23342e;
    --warn: #e0a55a; --warn-soft: #3a2d1b; --danger: #e07a6b; --key: #b89be0; --key-soft: #2e2638;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 15px/1.55 var(--sans);
}
a { color: var(--accent); }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.2; }

.top, main, .foot { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 28px; padding-bottom: 8px; flex-wrap: wrap; }
.brand h1 { margin: 0; font-size: 34px; letter-spacing: -.01em; }
.brand p { margin: 2px 0 0; color: var(--muted); }
.conn { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.conn .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.conn.bad .dot { background: var(--danger); }
.conn button { font-size: 12px; padding: 3px 9px; }
.foot { color: var(--muted); font-size: 13px; padding-top: 32px; padding-bottom: 32px; }
.loading { color: var(--muted); }

/* karty i objaśnienia */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; box-shadow: var(--shadow); }
.explain { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 12px 16px; border-radius: 0 10px 10px 0; margin: 0 0 20px; }
.explain p { margin: 0; }
.explain p + p { margin-top: 6px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* przyciski i pola */
button, .btn {
  font: inherit; font-weight: 550; border: 1px solid var(--line); background: var(--card); color: var(--ink);
  padding: 8px 16px; border-radius: 8px; cursor: pointer;
}
button:hover { border-color: var(--muted); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.primary:hover { filter: brightness(1.07); }
button.danger { color: var(--danger); }
button:disabled { opacity: .5; cursor: default; }
label.field { display: block; margin: 14px 0; }
label.field span { display: block; font-weight: 600; margin-bottom: 4px; }
label.field small { display: block; color: var(--muted); margin-top: 4px; }
input[type=text], input[type=password] {
  width: 100%; font: inherit; padding: 9px 12px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--paper); color: var(--ink);
}
input:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.err { color: var(--danger); margin: 10px 0 0; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* kreator: wybór transportu */
.wizard h2 { font-size: 26px; margin: 18px 0 6px; }
.options { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; margin: 18px 0; }
.option { position: relative; display: flex; flex-direction: column; justify-content: flex-start; text-align: left; padding: 18px; border-radius: 12px; border: 2px solid var(--line); background: var(--card); cursor: pointer; font-weight: 400; }
.option.selected { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.option[disabled] { cursor: default; opacity: .72; }
.option h3 { margin: 0 0 4px; font-size: 19px; }
.option .for { color: var(--muted); margin: 0 0 10px; font-size: 14px; }
.option ul { margin: 0; padding-left: 0; list-style: none; font-size: 14px; }
.option li { padding-left: 20px; position: relative; margin: 3px 0; }
.option li.plus::before { content: "+"; position: absolute; left: 3px; color: var(--accent); font-weight: 700; }
.option li.minus::before { content: "–"; position: absolute; left: 3px; color: var(--warn); font-weight: 700; }
.badge { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; padding: 2px 8px; border-radius: 99px; background: var(--accent); color: var(--accent-ink); vertical-align: 3px; margin-left: 6px; }
.badge.soon { background: var(--line); color: var(--muted); }
.badge.key { background: var(--key-soft); color: var(--key); text-transform: none; letter-spacing: 0; font-size: 12px; }

/* baner parowania */
.pair { display: flex; gap: 22px; align-items: center; margin: 18px 0; border: 2px solid var(--accent); flex-wrap: wrap; }
.pair .code { font: 700 44px/1 var(--mono); letter-spacing: .18em; padding: 12px 16px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); }
.pair .what { flex: 1; min-width: 240px; }
.pair h3 { margin: 0 0 4px; font-size: 20px; }
.pair p { margin: 0 0 12px; }

/* zakładki */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 22px 0 20px; overflow-x: auto; }
.tabs button { border: none; background: none; border-bottom: 2px solid transparent; border-radius: 0; padding: 10px 14px; color: var(--muted); white-space: nowrap; }
.tabs button[aria-selected=true] { color: var(--ink); border-bottom-color: var(--accent); }
.tabs .count { font-size: 12px; background: var(--line); border-radius: 99px; padding: 0 7px; margin-left: 5px; }

/* urządzenia */
.devices { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 14px; }
.device h3 { margin: 0; font-size: 19px; display: flex; align-items: center; gap: 8px; }
.device h3 button { font-size: 12px; padding: 2px 8px; font-family: var(--sans); font-weight: 500; }
.device dl { display: grid; grid-template-columns: auto 1fr; gap: 3px 12px; margin: 12px 0 14px; font-size: 14px; }
.device dt { color: var(--muted); }
.device dd { margin: 0; }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 12px 0 0; }
.steps li { counter-increment: s; padding-left: 38px; position: relative; margin: 12px 0; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: -1px; width: 26px; height: 26px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; display: grid; place-items: center; }
code, kbd { font-family: var(--mono); font-size: .92em; background: var(--paper); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; }

/* macierz grup × urządzenia */
.matrix-wrap { overflow-x: auto; }
table.matrix { width: 100%; border-collapse: collapse; }
.matrix th, .matrix td { padding: 12px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.matrix thead th { font-size: 13px; color: var(--muted); font-weight: 600; text-align: center; white-space: nowrap; }
.matrix thead th:first-child { text-align: left; }
.matrix td.cell { text-align: center; vertical-align: middle; width: 110px; }
.matrix .gname { font-weight: 650; }
.matrix .gdesc { font-size: 14px; color: var(--muted); margin-top: 2px; max-width: 560px; }
.matrix .gwarn { font-size: 13px; color: var(--warn); background: var(--warn-soft); border-radius: 7px; padding: 5px 9px; margin-top: 6px; max-width: 560px; }
.switch { position: relative; display: inline-block; width: 42px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch span { position: absolute; inset: 0; background: var(--line); border-radius: 99px; transition: .15s; cursor: pointer; }
.switch span::after { content: ""; position: absolute; width: 18px; height: 18px; left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: .15s; box-shadow: 0 1px 2px rgba(0,0,0,.25); }
.switch input:checked + span { background: var(--accent); }
.switch input:checked + span::after { transform: translateX(18px); }
.switch input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.never { margin-top: 26px; }
.never h3 { font-size: 18px; margin: 0 0 8px; }
.never ul { margin: 0; padding-left: 18px; }
.never li { margin: 4px 0; }

/* wspólne wartości */
.vgroup { margin-bottom: 22px; }
.vgroup h3 { font-size: 18px; margin: 0 0 8px; }
.vrow { display: grid; grid-template-columns: minmax(180px, 280px) 1fr; gap: 12px; padding: 8px 0; border-top: 1px solid var(--line); font-size: 14px; }
.vrow .k { font-family: var(--mono); font-size: 12.5px; word-break: break-all; }
.vrow .k .f { color: var(--muted); display: block; }
.vrow pre { margin: 0; font: 12.5px/1.45 var(--mono); white-space: pre-wrap; word-break: break-all; max-height: 7.5em; overflow: auto; }
.vrow .meta { color: var(--muted); font-size: 12px; margin-top: 3px; }
.vrow.deleted pre { text-decoration: line-through; color: var(--muted); }

.prose { max-width: 720px; }
.prose h3 { font-size: 20px; margin: 22px 0 6px; }
.prose p, .prose li { margin: 6px 0; }

@media (max-width: 600px) {
  .brand h1 { font-size: 28px; }
  .vrow { grid-template-columns: 1fr; }
  .pair .code { font-size: 34px; }
}