/* Kurs Pliant — Platform Infrastructure
   Visual: settlement desk / card authorization, not a SaaS landing page. */

:root {
  --ink: #14202b;
  --ink-soft: #3d4d5c;
  --navy: #0e2f45;
  --navy-2: #16425c;
  --paper: #eef2f5;
  --card: #fbfcfd;
  --stripe: #101418;
  --chip: #c4a046;
  --chip-dim: #a8882e;
  --approve: #1b6e56;
  --approve-bg: #e6f3ee;
  --warn: #8a4b12;
  --warn-bg: #f7eedf;
  --stop: #8e1f1f;
  --stop-bg: #f6e6e6;
  --line: #d3dce4;
  --line-strong: #b7c4d0;
  --link: #1a5f8a;
  --focus: #c4a046;
  --aside: #e6ebf0;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --display: "Bricolage Grotesque", "Atkinson Hyperlegible", sans-serif;
  --radius: 10px;
  --shadow: 0 1px 0 rgba(20, 32, 43, 0.04), 0 12px 28px rgba(20, 32, 43, 0.06);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.55;
  min-height: 100vh;
}

a { color: var(--link); text-underline-offset: 3px; }
a:hover { color: var(--navy); }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
}
.skip:focus {
  left: 8px;
  z-index: 50;
  background: #fff;
  padding: 8px 12px;
}

/* Magnetic stripe */
.stripe {
  background: var(--stripe);
  color: #d7c48a;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 22px;
  position: sticky;
  top: 0;
  z-index: 20;
}
.stripe span, .stripe a { white-space: nowrap; }
.stripe .ok { color: #8fd4b8; }
.stripe a.hub {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(215, 196, 138, 0.4);
}
.stripe a.hub:hover { color: #fff; border-bottom-color: currentColor; }

.layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: calc(100vh - 38px);
}

aside {
  background: var(--aside);
  border-right: 1px solid var(--line);
  padding: 22px 16px 48px;
  position: sticky;
  top: 38px;
  height: calc(100vh - 38px);
  overflow: auto;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin: 0 8px 22px;
  text-decoration: none;
  color: inherit;
}
.chip {
  width: 36px;
  height: 28px;
  border-radius: 4px;
  background: linear-gradient(135deg, #e8d48a 0%, #c4a046 45%, #8d7024 100%);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.18);
  flex: 0 0 auto;
}
.brand h1 {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 650;
  margin: 0;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.brand p {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--ink-soft);
}

.nav-search {
  width: 100%;
  margin: 0 0 16px;
  padding: 8px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: #fff;
  font: inherit;
  font-size: 14px;
}

.nav-group {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 18px 8px 6px;
}

aside nav {
  display: flex;
  flex-direction: column;
}
aside nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--ink);
  font-size: 14.5px;
  line-height: 1.3;
}
aside nav a:hover { background: rgba(255,255,255,.7); }
aside nav a.active {
  background: #fff;
  box-shadow: 0 0 0 1px var(--line);
  font-weight: 700;
}
aside nav a .mark {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--line-strong);
  flex: 0 0 auto;
}
aside nav a.done .mark {
  background: var(--approve);
  border-color: var(--approve);
}

.menu-btn {
  display: none;
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 30;
  background: var(--navy);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 12px 16px;
  font: inherit;
  font-size: 14px;
  box-shadow: var(--shadow);
}

main {
  padding: 36px 48px 80px;
  max-width: 920px;
}

.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--chip-dim);
  margin: 0 0 8px;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--navy);
}
h1 { font-size: clamp(32px, 5vw, 46px); margin: 0 0 16px; font-weight: 700; }
h2 { font-size: 28px; margin: 42px 0 12px; font-weight: 680; }
h3 { font-size: 20px; margin: 28px 0 8px; font-weight: 650; }
h4 { font-size: 17px; margin: 20px 0 6px; }

p { margin: 0 0 14px; }
ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin: 0 0 6px; }
li > ul, li > ol { margin-top: 6px; }

.lead {
  font-size: 20px;
  color: var(--ink-soft);
  max-width: 62ch;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 28px;
}
.pill {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--line-strong);
  background: #fff;
  padding: 4px 8px;
  border-radius: 999px;
  color: var(--ink-soft);
}

.card, .callout, .pair, .q, .term, .day, .mod {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.callout {
  padding: 16px 18px;
  margin: 18px 0;
}
.callout.say { border-left: 4px solid var(--approve); background: var(--approve-bg); box-shadow: none; }
.callout.dont { border-left: 4px solid var(--stop); background: var(--stop-bg); box-shadow: none; }
.callout.warn { border-left: 4px solid var(--chip); background: var(--warn-bg); box-shadow: none; }
.callout.note { border-left: 4px solid var(--navy-2); }
.callout strong.label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  overflow: hidden;
  margin: 18px 0;
}
.pair > div { padding: 16px 18px; }
.pair .bad { background: var(--stop-bg); border-right: 1px solid var(--line); }
.pair .good { background: var(--approve-bg); }
.pair h4 { margin-top: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 18px 0 28px;
}
.mod { padding: 16px 16px 18px; text-decoration: none; color: inherit; display: block; }
.mod:hover { border-color: var(--navy-2); }
.mod .n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--chip-dim);
}
.mod h3 { margin: 6px 0 6px; font-size: 18px; }
.mod p { margin: 0; font-size: 15px; color: var(--ink-soft); }

.days { display: grid; gap: 10px; margin: 16px 0 28px; }
.day {
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 92px 1fr auto;
  gap: 12px;
  align-items: start;
  text-decoration: none;
  color: inherit;
}
.day:hover { border-color: var(--navy-2); }
.day .d {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--chip-dim);
  text-transform: uppercase;
}
.day h3 { margin: 0 0 4px; font-size: 18px; }
.day p { margin: 0; font-size: 15px; color: var(--ink-soft); }
.day .min { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); }

.q { padding: 18px 20px; margin: 16px 0; }
.q .num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--chip-dim);
}
.q h3 { margin: 4px 0 10px; }
details.q > summary {
  cursor: pointer;
  list-style: none;
}
details.q > summary::-webkit-details-marker { display: none; }
details.q > summary::after {
  content: "rozwiń odpowiedź";
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--link);
  margin-top: 6px;
}
details.q[open] > summary::after { content: "zwiń"; }

pre, code { font-family: var(--mono); }
code {
  font-size: 0.86em;
  background: #e8eef3;
  padding: 0.08em 0.35em;
  border-radius: 4px;
}
pre {
  background: var(--navy);
  color: #e8eef3;
  padding: 16px 18px;
  border-radius: var(--radius);
  overflow: auto;
  font-size: 13.5px;
  line-height: 1.45;
  margin: 0 0 16px;
}
pre code { background: none; color: inherit; padding: 0; font-size: inherit; }

.diagram {
  background: #fff;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.35;
  white-space: pre;
  margin: 0 0 16px;
  color: var(--navy);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15.5px;
  margin: 0 0 18px;
  background: #fff;
}
th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--aside);
}

.term {
  padding: 14px 16px;
  margin: 0 0 10px;
}
.term h3 {
  margin: 0 0 6px;
  font-size: 18px;
  display: flex;
  gap: 10px;
  align-items: baseline;
  flex-wrap: wrap;
}
.term .en {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  font-weight: 400;
  letter-spacing: 0;
}

.alpha {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 20px;
  position: sticky;
  top: 46px;
  background: var(--paper);
  padding: 8px 0;
  z-index: 5;
}
.alpha a {
  display: inline-flex;
  font-family: var(--mono);
  font-size: 12px;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--line);
  background: #fff;
  padding: 4px 8px;
  border-radius: 4px;
}

.progress {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-soft);
  margin: 8px 8px 0;
}
.bar {
  flex: 1;
  height: 6px;
  background: #cfd8e0;
  border-radius: 99px;
  overflow: hidden;
}
.bar > i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--approve);
}

.footer-note {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-soft);
}

.pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 36px;
}
.pager a {
  flex: 1;
  text-decoration: none;
  border: 1px solid var(--line);
  background: #fff;
  padding: 12px 14px;
  border-radius: var(--radius);
  color: inherit;
}
.pager a:hover { border-color: var(--navy-2); }
.pager .next { text-align: right; }
.pager small {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.mark-done {
  margin: 24px 0 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
}
.mark-done input { width: 16px; height: 16px; }

.toc {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 18px;
  margin: 0 0 24px;
}
.toc a { text-decoration: none; }
.toc ol { margin: 0; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  aside {
    position: fixed;
    inset: 38px auto 0 0;
    width: min(88vw, 320px);
    transform: translateX(-105%);
    transition: transform .2s ease;
    z-index: 25;
    box-shadow: var(--shadow);
  }
  aside.open { transform: none; }
  .menu-btn { display: inline-flex; }
  main { padding: 24px 18px 96px; }
  .pair, .day { grid-template-columns: 1fr; }
  .stripe { font-size: 10px; padding: 8px 12px; overflow: hidden; }
  .stripe .pan { display: none; }
  h1 { font-size: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  aside { transition: none; }
}