:root {
  --accent: #2563eb;
  --accent-soft: #eff4ff;
  --ink: #0f172a;
  --ink-soft: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --radius: 10px;
  --maxw: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-soft);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  overflow-wrap: break-word;
}

/* ---------- horní lišta ---------- */

.topbar {
  background: #0f172a;
  color: #e2e8f0;
}

.topbar-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
}

.topbar-brand {
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.01em;
  margin-right: auto;
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.topbar nav a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.92rem;
  padding: 5px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

.topbar nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.topbar nav a.is-active {
  color: #fff;
  background: var(--accent);
}

/* ---------- rozvržení ---------- */

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 28px 20px 72px;
}

.breadcrumb {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 18px;
}

.breadcrumb a {
  color: var(--accent);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.page-header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 22px;
  margin-bottom: 28px;
}

.page-header h1 {
  margin: 0 0 10px;
}

.lead {
  font-size: 1.08rem;
  color: var(--ink-soft);
  margin: 0;
  max-width: 62ch;
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 960px) {
  .layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .toc {
    position: sticky;
    top: 24px;
  }
}

main {
  min-width: 0;
}

/* ---------- obsah (TOC) ---------- */

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.toc h2 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 10px;
}

.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.toc a {
  display: block;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.93rem;
  padding: 5px 11px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
}

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

@media (min-width: 960px) {
  .toc ul {
    display: block;
  }

  .toc a {
    background: none;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 4px 0 4px 12px;
  }

  .toc a:hover {
    border-left-color: var(--accent);
  }
}

/* ---------- typografie ---------- */

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.25;
  letter-spacing: -0.015em;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.4rem;
  margin: 44px 0 12px;
  scroll-margin-top: 20px;
}

h3 {
  font-size: 1.08rem;
  margin: 26px 0 8px;
}

section:first-of-type > h2 {
  margin-top: 0;
}

p {
  margin: 0 0 14px;
  max-width: 68ch;
}

ul,
ol {
  max-width: 68ch;
  padding-left: 22px;
  margin: 0 0 16px;
}

li {
  margin-bottom: 6px;
}

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

strong {
  color: var(--ink);
}

code {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
  font-size: 0.9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 40px 0;
}

/* ---------- ukázky kódu ---------- */

pre {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 0 0 16px;
  max-width: 68ch;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.55;
}

pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
  color: var(--ink);
  white-space: pre;
}

/* ---------- tabulky ---------- */

.table-wrap {
  overflow-x: auto;
  margin: 0 0 16px;
  max-width: 68ch;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.93rem;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 8px 12px 8px 0;
  text-align: left;
  vertical-align: top;
}

th {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  white-space: nowrap;
}

/* Pojistka: hlavička sloupce se na úzkém displeji zalomí (#946). Nezalomitelné
   `th` je jediný obsah tabulky, který nemá jak se vejít — a tabulce, které
   někdo zapomene dát obal .table-wrap, tím roztáhne celou stránku mimo
   obrazovku. Uvnitř .table-wrap se nic nemění, ta si scrolluje sama. */
@media (max-width: 620px) {
  th {
    white-space: normal;
  }
}

/* ---------- karty s návody ---------- */

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 0 0 8px;
}

@media (min-width: 620px) {
  .cards {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  display: block;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 18px;
  text-decoration: none;
  background: var(--bg-soft);
  color: var(--ink-soft);
}

.card:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.card strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 4px;
  color: var(--accent);
}

.card span {
  font-size: 0.93rem;
}

/* ---------- upozornění ---------- */

.note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 12px 16px;
  margin: 0 0 16px;
  max-width: 68ch;
}

.note p:last-child {
  margin-bottom: 0;
}

.note strong {
  color: var(--accent);
}

/* ---------- kroky návodu ---------- */

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0 0 0 16px;
  margin: 0;
  max-width: 68ch;
}

.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0 0 22px 30px;
  margin: 0;
  border-left: 1px solid var(--line);
}

.steps > li:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: -15px;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.steps h3 {
  margin: 3px 0 8px;
}

.field-list {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
}

.field-list li {
  padding-left: 14px;
  border-left: 2px solid var(--line);
  margin-bottom: 8px;
}

/* ---------- patička ---------- */

.page-nav {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 0.94rem;
}

.page-nav a {
  text-decoration: none;
}

.page-nav a:hover {
  text-decoration: underline;
}

@media (max-width: 420px) {
  h1 {
    font-size: 1.65rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .wrap {
    padding: 22px 16px 56px;
  }

  table {
    table-layout: fixed;
  }

  th,
  td {
    overflow-wrap: anywhere;
  }

  th:first-child,
  td:first-child {
    width: 42%;
  }
}