/* SilentKey — jeden stylopis pro obě jazykové verze.

   Bez webového písma schválně. Stránka o správci hesel má mít co nejužší
   Content-Security-Policy, a `font-src 'self'` znamená buď písmo hostovat,
   nebo žádné nemít. Systémové písmo je na Applu i ve Windows to, co člověk
   čte celý den — a ušetří dvě stě kilobajtů, které by se stahovaly odjinud.
   Hierarchii nese velikost, tučnost a prostor, ne exotický řez. */

:root {
  color-scheme: light dark;

  --ground: #f4f6f5;
  --surface: #ffffff;
  --sunk: #e8ecea;
  --ink: #131c1b;
  --muted: #576664;
  --faint: #86928f;
  --accent: #0d6f62;
  --accent-ink: #ffffff;
  --accent-soft: rgba(13, 111, 98, 0.10);
  --flag: #96470f;
  --rule: rgba(19, 28, 27, 0.12);
  --rule-firm: rgba(19, 28, 27, 0.26);
  --shadow: 0 1px 2px rgba(19, 28, 27, .06), 0 12px 32px rgba(19, 28, 27, .07);

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --wrap: 1080px;
  --text: 34rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #0b100f;
    --surface: #131a19;
    --sunk: #0f1514;
    --ink: #e3e9e7;
    --muted: #94a3a0;
    --faint: #6d7b78;
    --accent: #4fd3b8;
    --accent-ink: #06201b;
    --accent-soft: rgba(79, 211, 184, 0.12);
    --flag: #e2954f;
    --rule: rgba(227, 233, 231, 0.13);
    --rule-firm: rgba(227, 233, 231, 0.28);
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 18px 44px rgba(0, 0, 0, .34);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 400 17px/1.62 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 22px; }

a { color: var(--accent); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px;
  padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
a.visually-hidden:focus {
  position: fixed; top: 10px; left: 10px; width: auto; height: auto;
  clip: auto; padding: 10px 14px; background: var(--surface);
  border: 1px solid var(--rule-firm); border-radius: 8px; z-index: 20;
}

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

.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--ground) 86%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.nav.is-stuck { border-bottom-color: var(--rule); }

.nav__inner { display: flex; align-items: center; gap: 18px; height: 62px; }

.nav__brand {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 600; font-size: 16.5px; letter-spacing: -.01em;
  color: var(--ink); text-decoration: none;
}
.nav__brand svg { width: 26px; height: 26px; color: var(--accent); }

.nav__links { display: flex; gap: 20px; margin-left: auto; }
.nav__links a {
  color: var(--muted); text-decoration: none; font-size: 15px;
}
.nav__links a:hover { color: var(--ink); }

.lang { display: flex; gap: 8px; align-items: center; font: 500 12px/1 var(--mono); }
.lang span { color: var(--ink); }
.lang a { color: var(--faint); text-decoration: none; }
.lang a:hover { color: var(--accent); }

@media (max-width: 820px) {
  .nav__links { display: none; }
  .lang { margin-left: auto; }
}

/* --------------------------------------------------------------- tlačítka */

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 20px; border-radius: 11px;
  font: 600 15.5px/1 var(--sans); text-decoration: none;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .12s ease, background-color .15s ease, border-color .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn svg { width: 17px; height: 17px; }

.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: color-mix(in srgb, var(--accent) 88%, var(--ink)); }

.btn--ghost { border-color: var(--rule-firm); color: var(--ink); }
.btn--ghost:hover { background: var(--accent-soft); border-color: var(--accent); }

.btn--sm { padding: 8px 14px; font-size: 14px; border-radius: 9px; }

/* -------------------------------------------------------------------- hero */

.hero { padding: 84px 0 68px; }
.hero .wrap { display: flex; flex-direction: column; gap: 20px; align-items: flex-start; }

.badge {
  display: inline-flex; align-items: center; gap: 8px; margin: 0;
  padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--rule-firm);
  font: 500 12.5px/1 var(--mono); color: var(--muted);
  letter-spacing: .01em;
}
.badge__dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
}

h1 {
  margin: 0; max-width: 15ch;
  font: 700 clamp(38px, 6.4vw, 66px)/1.03 var(--sans);
  letter-spacing: -.032em; text-wrap: balance;
}

.lead { margin: 0; max-width: var(--text); font-size: 19.5px; color: var(--muted); }

.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; padding-top: 6px; }
.hero__note { margin: 0; font-size: 14px; color: var(--faint); max-width: var(--text); }

/* ------------------------------------------------------------------ sekce */

.section { padding: 68px 0; border-top: 1px solid var(--rule); }
.section--tint { background: var(--sunk); }

.section__head { display: flex; flex-direction: column; gap: 12px; margin-bottom: 34px; }
.eyebrow {
  margin: 0; font: 600 11.5px/1 var(--mono);
  letter-spacing: .17em; text-transform: uppercase; color: var(--accent);
}
h2 {
  margin: 0; max-width: 20ch;
  font: 700 clamp(27px, 3.6vw, 38px)/1.12 var(--sans);
  letter-spacing: -.024em; text-wrap: balance;
}
h3 { margin: 0; font: 600 17.5px/1.3 var(--sans); letter-spacing: -.01em; }
.section__head p { margin: 0; max-width: var(--text); color: var(--muted); font-size: 18px; }

/* ------------------------------------------------------------ dvě poloviny */

.halves { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.card {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: 16px; padding: 22px 24px;
  display: flex; flex-direction: column; gap: 10px;
}
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.card__mark {
  width: 34px; height: 34px; border-radius: 9px;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
}
.card__mark svg { width: 19px; height: 19px; }

.plus {
  display: grid; place-items: center; font: 600 22px/1 var(--mono); color: var(--faint);
}

/* ------------------------------------------------------------------ mřížka */

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

/* ------------------------------------------------------------------ obrázek */

.figure {
  border: 1px solid var(--rule); border-radius: 18px; background: var(--surface);
  padding: 26px; box-shadow: var(--shadow); overflow: hidden;
}
.figure svg { display: block; width: 100%; height: auto; }
.figure figcaption {
  margin: 16px 0 0; font-size: 14.5px; color: var(--faint); text-align: center;
}

/* ------------------------------------------------------------------ seznam */

.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.checks li { display: flex; gap: 11px; align-items: flex-start; color: var(--muted); font-size: 16.5px; }
.checks svg { width: 19px; height: 19px; color: var(--accent); flex: none; margin-top: 2px; }
.checks b { color: var(--ink); font-weight: 600; }

/* ------------------------------------------------------------------ tabulka */

.table { overflow-x: auto; border: 1px solid var(--rule); border-radius: 14px; background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 15.5px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--rule); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
th {
  font: 600 11.5px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); background: var(--sunk); white-space: nowrap;
}
td b { font-weight: 600; }
.tag {
  display: inline-block; font: 600 11.5px/1 var(--mono);
  padding: 5px 8px; border-radius: 5px; border: 1px solid var(--rule-firm); color: var(--muted);
  white-space: nowrap;
}
.tag--now { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

/* --------------------------------------------------------------- text stránky */

.prose { max-width: var(--text); display: flex; flex-direction: column; gap: 16px; }
.prose h2 { margin-top: 22px; }
.prose h3 { margin-top: 14px; }
.prose p, .prose li { color: var(--muted); }
.prose ul { margin: 0; padding-left: 1.15em; display: flex; flex-direction: column; gap: 8px; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose code {
  font: 400 .9em var(--mono); background: var(--sunk);
  border: 1px solid var(--rule); border-radius: 5px; padding: 1px 5px;
}
.prose .updated { font: 500 13px/1 var(--mono); color: var(--faint); }

/* ------------------------------------------------------------------ patička */

.foot { border-top: 1px solid var(--rule); padding: 40px 0 56px; color: var(--faint); font-size: 14.5px; }
.foot .wrap { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--accent); }
.foot__spacer { margin-left: auto; }

/* ---------------------------------------------------------------- odkrývání */

.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}