/*
 * Stránka je navržená tmavá a tmavá zůstává výchozí. Světlá varianta se zapíná jedině
 * podle nastavení systému a mění pouze hodnoty proměnných — žádné pravidlo níže neví,
 * které schéma je zrovna na řadě. Proto tu nesmí přibýt barva zapsaná natvrdo: unikla by
 * přepnutí a v druhém schématu by zůstala nečitelná.
 */
:root {
  color-scheme: dark;
  --bg: #07110f;
  --ink: #edf8f3;
  --ink-soft: #c9d9d2;
  --ink-faint: #6f887f;
  --muted: #92a79e;
  --line: rgba(204, 239, 223, 0.14);
  --accent: #5ee3a4;
  --accent-soft: #b6f4d4;
  --accent-bright: #80edb9;
  --accent-text: #8fe6bb;
  /* Text na ploše accentu; ne pozadí stránky, i když jsou v tmavém schématu shodné. */
  --on-accent: #07110f;
  --warn: #e08163;
  --surface: rgba(13, 30, 25, 0.78);
  --surface-solid: #10211c;
  --select-hot: #1c4133;
  --glow-a: rgba(34, 157, 105, 0.17);
  --glow-b: rgba(42, 98, 79, 0.16);
  --grid-line: rgba(255, 255, 255, 0.05);
  --tint-01: rgba(255, 255, 255, 0.012);
  --tint-02: rgba(255, 255, 255, 0.018);
  --tint-03: rgba(255, 255, 255, 0.02);
  --tint-05: rgba(255, 255, 255, 0.025);
  --accent-wash: rgba(94, 227, 164, 0.07);
  --accent-wash-strong: rgba(94, 227, 164, 0.09);
  --accent-edge: rgba(94, 227, 164, 0.4);
  --shadow-soft: rgba(0, 0, 0, 0.28);
  --shadow-strong: rgba(0, 0, 0, 0.5);
  --scrim: rgba(4, 11, 9, 0.74);
  --scrim-soft: rgba(7, 17, 15, 0.6);
  /*
   * Tlačítka jsou klávesy: čelo má plnou barvu a pod ním leží stejně tvarovaná základna,
   * ze které je vidět jen spodní hrana. Průsvitné pozadí by nešlo — základna by přes čelo
   * prosvítala a klávesa by přestala vypadat jako těleso.
   */
  --key-face: #152420;
  --key-face-hot: #1b2f28;
  --key-face-on: #16342a;
  --key-base: #0d1c17;
  --key-accent-base: #2f9d6f;
  --key-lift: 4px;
  --key-lift-small: 3px;
}

/*
 * Světlé schéma není převrácení tmavého. Zelená #5ee3a4 má na bílé kontrast 1,6 : 1, takže
 * accent musí ztmavnout, jinak z nadpisů a odkazů zbude nečitelný pastel. Naopak závoje,
 * které v tmavém schématu přisvětlují (bílá s nízkou průhledností), musí ve světlém
 * ztmavovat — jinak by karty splynuly s pozadím.
 */
@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #f2f8f5;
    --ink: #0b1a16;
    --ink-soft: #2d453d;
    --ink-faint: #5a736a;
    --muted: #4f6a60;
    --line: rgba(11, 45, 35, 0.16);
    --accent: #0c7a4c;
    --accent-soft: #0b6b45;
    --accent-bright: #129a63;
    --accent-text: #0c6c47;
    --on-accent: #ffffff;
    --warn: #b04524;
    --surface: rgba(255, 255, 255, 0.86);
    --surface-solid: #ffffff;
    --select-hot: #d8f0e4;
    --glow-a: rgba(34, 157, 105, 0.16);
    --glow-b: rgba(42, 98, 79, 0.12);
    --grid-line: rgba(11, 45, 35, 0.05);
    --tint-01: rgba(11, 45, 35, 0.014);
    --tint-02: rgba(11, 45, 35, 0.022);
    --tint-03: rgba(11, 45, 35, 0.026);
    --tint-05: rgba(11, 45, 35, 0.032);
    --accent-wash: rgba(12, 122, 76, 0.07);
    --accent-wash-strong: rgba(12, 122, 76, 0.11);
    --accent-edge: rgba(12, 122, 76, 0.38);
    --shadow-soft: rgba(11, 45, 35, 0.1);
    --shadow-strong: rgba(11, 45, 35, 0.16);
    --scrim: rgba(255, 255, 255, 0.82);
    --scrim-soft: rgba(242, 248, 245, 0.72);
    --key-face: #ffffff;
    --key-face-hot: #eef7f2;
    --key-face-on: #ddf1e7;
    --key-base: #c3d9ce;
    --key-accent-base: #0a5c3c;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 82% 8%, var(--glow-a), transparent 28rem),
    radial-gradient(circle at 0 72%, var(--glow-b), transparent 35rem),
    var(--bg);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  opacity: 0.17;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}

main {
  width: min(1180px, calc(100% - clamp(32px, 6vw, 48px)));
  margin: 0 auto;
}

img {
  display: block;
  max-width: 100%;
}

a {
  overflow-wrap: anywhere;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 98px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  gap: 14px;
  align-items: center;
  color: var(--ink);
  font-size: 15px;
  font-weight: 670;
  letter-spacing: 0.03em;
  text-decoration: none;
}

/*
    Značka je přímo soubor ikony, ne její napodobenina v CSS. Skládala se ze čtyř proužků
    na průsvitné podložce a po přebarvení ikony se s aplikací rozešla: ta má pět proužků
    s odstupňovanou průhledností na zelené ploše. Jeden zdroj se rozejít nemůže.
*/
.mark {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  background: url("/icon.svg") center / contain no-repeat;
}

.status {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  padding: 8px 12px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 630;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--tint-05);
}

.status-dot {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 15px var(--accent);
}

.topbar-end {
  display: inline-flex;
  gap: 12px;
  align-items: center;
}

/*
    Přepínač jazyka pojmenovává jazyk, do kterého vede, a to jeho vlastním jménem: „English“
    na české stránce, „Čeština“ na anglické. Vlaječka by tvrdila zemi místo jazyka a dvojice
    kódů EN/CS nutí čtenáře hádat, který z nich je stav a který akce.
*/
.lang-switch {
  display: inline-flex;
  padding: 8px 12px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 630;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.lang-switch:hover,
.lang-switch:focus-visible {
  color: var(--ink);
  border-color: var(--accent);
}

.hero {
  padding: clamp(84px, 12vw, 154px) 0 clamp(82px, 11vw, 140px);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(330px, 0.65fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  margin-bottom: 68px;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-label {
  margin: 0 0 24px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 680;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.version-link {
  color: inherit;
  text-underline-offset: 0.28em;
  text-decoration-thickness: 1px;
}

.version-link:hover,
.version-link:focus-visible {
  color: var(--ink);
}

h1 {
  max-width: 760px;
  margin-bottom: 32px;
  font-size: clamp(54px, 6.7vw, 92px);
  font-weight: 620;
  line-height: 0.92;
  letter-spacing: -0.065em;
}

h1 span {
  color: transparent;
  background: linear-gradient(92deg, var(--accent-bright), var(--accent-soft));
  background-clip: text;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(38px, 5.2vw, 70px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.05em;
}

.lede {
  max-width: 720px;
  margin-bottom: 38px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-bottom: var(--key-lift);
}

.phone-showcase {
  position: relative;
  width: min(100%, 430px);
  height: clamp(500px, 52vw, 630px);
  justify-self: end;
}

.phone-showcase > p {
  position: absolute;
  top: -32px;
  left: 50%;
  z-index: 5;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  width: max-content;
  margin: 0;
  color: var(--ink-faint);
  font-size: 10px;
  font-weight: 670;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transform: translateX(-50%);
}

.phone-showcase > p span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.phone-frame {
  position: absolute;
  display: block;
  overflow: hidden;
  padding: 7px;
  border: 1px solid var(--accent-edge);
  border-radius: 34px;
  background: #030806;
  box-shadow: 0 30px 80px var(--shadow-strong);
  transition: border-color 160ms ease, transform 180ms ease, filter 180ms ease;
}

.phone-frame::before {
  position: absolute;
  top: 14px;
  left: 50%;
  z-index: 2;
  width: 28%;
  height: 9px;
  content: "";
  border-radius: 999px;
  background: #030806;
  transform: translateX(-50%);
}

.phone-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 27px;
}

.phone-frame-main {
  top: 0;
  left: 50%;
  z-index: 3;
  width: clamp(218px, 23vw, 276px);
  aspect-ratio: 1080 / 2424;
  transform: translateX(-50%);
}

.phone-frame-left,
.phone-frame-right {
  top: 13%;
  z-index: 1;
  width: clamp(174px, 18vw, 216px);
  aspect-ratio: 1080 / 2424;
  filter: brightness(0.62) saturate(0.82);
}

.phone-frame-left {
  left: 0;
  transform: rotate(-7deg);
}

.phone-frame-right {
  right: 0;
  transform: rotate(7deg);
}

.phone-frame:hover,
.phone-frame:focus-visible {
  z-index: 4;
  border-color: var(--accent);
  filter: brightness(1) saturate(1);
}

.phone-frame-main:hover,
.phone-frame-main:focus-visible {
  transform: translateX(-50%) translateY(-6px);
}

.phone-frame-left:hover,
.phone-frame-left:focus-visible {
  transform: rotate(-5deg) translateY(-6px);
}

.phone-frame-right:hover,
.phone-frame-right:focus-visible {
  transform: rotate(5deg) translateY(-6px);
}

.button {
  display: inline-flex;
  gap: 16px;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 20px;
  font-size: 13px;
  font-weight: 720;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 9px;
  box-shadow: 0 var(--key-lift) 0 var(--key-base);
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease,
    transform 90ms ease, box-shadow 90ms ease;
}

.button-primary {
  color: var(--on-accent);
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 var(--key-lift) 0 var(--key-accent-base);
}

.button-primary span {
  opacity: 0.62;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.button-secondary {
  color: var(--ink);
  background: var(--key-face);
}

.button:hover,
.button:focus-visible {
  border-color: var(--accent-soft);
  filter: brightness(1.08);
}

/* Stisk sjede čelem přesně o výšku základny, takže klávesa zapadne do svého lůžka. */
.button:active {
  transform: translateY(var(--key-lift));
  box-shadow: 0 0 0 var(--key-base);
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 860px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.facts article {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 24px 28px 25px 0;
}

.facts article + article {
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.facts strong {
  font-size: 14px;
  font-weight: 690;
}

.facts span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(52px, 9vw, 130px);
  padding: clamp(65px, 8vw, 105px) 0;
  border-top: 1px solid var(--line);
}

.indexed-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.indexed-list li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  padding: 22px 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.4;
  border-bottom: 1px solid var(--line);
}

.indexed-list li span,
.feature-grid article > span {
  color: var(--accent);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.install-card {
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(145deg, var(--accent-wash), var(--tint-02));
}

.build-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 26px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.build-meta div {
  display: grid;
  gap: 5px;
  min-width: 0;
  padding: 18px 14px 18px 0;
}

.build-meta div + div {
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.build-meta span,
.build-meta strong {
  overflow-wrap: anywhere;
}

.build-meta span {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.build-meta strong {
  font-size: 14px;
}

.download-wide {
  width: 100%;
  margin-bottom: 26px;
}

.install-steps {
  display: grid;
  gap: 0;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.install-steps li {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.install-steps li > span {
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
}

.install-steps p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.55;
}

.note {
  margin-bottom: 0;
  color: var(--ink-faint);
  font-size: 12px;
  line-height: 1.6;
}

code {
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--accent-wash-strong);
  color: var(--accent-text);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.9em;
  white-space: nowrap;
}

.feature-section,
.resources-section,
.privacy-section {
  padding: clamp(65px, 8vw, 105px) 0;
  border-top: 1px solid var(--line);
}

.section-heading-row {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: clamp(44px, 8vw, 110px);
  align-items: end;
  margin-bottom: 52px;
}

.section-heading-row > p {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.feature-grid article {
  min-width: 0;
  min-height: 245px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--tint-01);
}

.feature-grid h3 {
  margin: 36px 0 14px;
  font-size: 19px;
  font-weight: 630;
  letter-spacing: -0.02em;
}

.feature-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

/* --- Pozvánka do interního testu --- */

.tester-section {
  padding: clamp(30px, 4vw, 44px) 0;
  border-top: 1px solid var(--line);
}

/*
    Panel má být vidět dřív, než se stránka dočte, ale nesmí přebít hero: proto plná nálepka
    a plná klávesa, zato na tlumeném podkladu a bez vlastního nadpisového kalibru.
*/
.tester-call {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px clamp(28px, 4vw, 64px);
  align-items: center;
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--tint-01);
}

/* Nálepka je jen tak široká, jak je text: bez justify-self by ji mřížka roztáhla přes panel. */
.tester-call .doc-stamp {
  grid-column: 1 / -1;
  justify-self: start;
  margin: 0;
}

.tester-copy h2 {
  margin: 0 0 8px;
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: -0.02em;
}

.tester-copy p {
  max-width: 60ch;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.tester-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* --- Přepínač verze u novinek --- */

.whatsnew-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
  margin-bottom: 26px;
}

.whatsnew-head .section-label {
  margin: 0;
}

.whatsnew-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.select-shell {
  position: relative;
  display: inline-flex;
}

/* Šipka je vlastní, protože nativní se v tmavém motivu na každé platformě liší. */
.select-shell::after {
  position: absolute;
  top: 50%;
  right: 15px;
  width: 7px;
  height: 7px;
  content: "";
  border-right: 1.5px solid var(--accent);
  border-bottom: 1.5px solid var(--accent);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}

.select-shell select {
  appearance: none;
  min-height: 38px;
  padding: 0 36px 0 15px;
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  border: 1px solid var(--accent-edge);
  border-radius: 999px;
  background: var(--key-face-on);
  box-shadow: 0 var(--key-lift-small) 0 var(--key-base);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease,
    transform 90ms ease, box-shadow 90ms ease;
}

.select-shell select:hover,
.select-shell select:focus-visible {
  border-color: var(--accent);
  background: var(--select-hot);
}

.select-shell select:active {
  transform: translateY(var(--key-lift-small));
  box-shadow: 0 0 0 var(--key-base);
}

/* Šipka drží čelo, ne lůžko — jinak by při stisku zůstala viset nad zapadlou klávesou. */
.select-shell:has(select:active)::after {
  transform: translateY(calc(-70% + var(--key-lift-small))) rotate(45deg);
}

.select-shell select option {
  color: var(--ink);
  background: var(--surface-solid);
}

.changelog-button {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 16px;
  color: var(--ink-soft);
  font-family: inherit;
  font-size: 12px;
  font-weight: 660;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--key-face);
  box-shadow: 0 var(--key-lift-small) 0 var(--key-base);
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease,
    transform 90ms ease, box-shadow 90ms ease;
}

.changelog-button:hover,
.changelog-button:focus-visible {
  color: var(--ink);
  border-color: var(--accent);
  background: var(--key-face-hot);
}

.changelog-button:active {
  transform: translateY(var(--key-lift-small));
  box-shadow: 0 0 0 var(--key-base);
}

/* --- Changelog v dialogu --- */

.changelog-dialog {
  width: min(760px, calc(100vw - 24px));
  max-width: none;
  max-height: min(84vh, 940px);
  padding: 0;
  overflow: hidden;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-solid);
  box-shadow: 0 30px 80px var(--shadow-strong);
}

.changelog-dialog[open] {
  display: flex;
  flex-direction: column;
}

.changelog-dialog::backdrop {
  background: var(--scrim);
}

.changelog-head {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  justify-content: space-between;
  padding: clamp(20px, 3vw, 26px) clamp(18px, 3vw, 28px) 18px;
  border-bottom: 1px solid var(--line);
}

.changelog-head .section-label {
  margin-bottom: 10px;
}

.changelog-head h2 {
  font-size: clamp(24px, 4.4vw, 32px);
}

.changelog-head h2 span {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.82em;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--accent-soft);
}

.changelog-close {
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  color: var(--ink-soft);
  font-family: inherit;
  font-size: 13px;
  line-height: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--key-face);
  box-shadow: 0 var(--key-lift-small) 0 var(--key-base);
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease,
    transform 90ms ease, box-shadow 90ms ease;
}

.changelog-close:hover,
.changelog-close:focus-visible {
  color: var(--ink);
  border-color: var(--accent);
  background: var(--key-face-hot);
}

.changelog-close:active {
  transform: translateY(var(--key-lift-small));
  box-shadow: 0 0 0 var(--key-base);
}

.changelog-body {
  padding: clamp(20px, 3vw, 26px) clamp(18px, 3vw, 28px);
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.changelog-body h3 {
  margin: 26px 0 12px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 680;
  letter-spacing: 0.14em;
  line-height: 1.5;
  text-transform: uppercase;
}

.changelog-body > h3:first-child {
  margin-top: 0;
}

.changelog-body p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.changelog-body ul {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

.changelog-body li {
  position: relative;
  padding: 0 0 0 20px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.65;
}

.changelog-body li + li {
  margin-top: 10px;
}

.changelog-body li::before {
  position: absolute;
  top: 0.62em;
  left: 2px;
  width: 6px;
  height: 1px;
  content: "";
  background: var(--accent);
}

.changelog-status {
  margin: 0;
}

.changelog-foot {
  padding: 14px clamp(18px, 3vw, 28px) 16px;
  border-top: 1px solid var(--line);
}

.changelog-foot a {
  color: var(--accent);
  font-size: 12px;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

.changelog-foot a:hover,
.changelog-foot a:focus-visible {
  color: var(--accent-soft);
}

.field-lede {
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 30px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metrics div {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 22px 18px 22px 0;
}

.metrics div + div {
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.metrics strong {
  color: var(--accent-soft);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 600;
  letter-spacing: -0.04em;
}

.metrics span {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.resource-list {
  border-top: 1px solid var(--line);
}

.resource-list a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 22px 0;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.resource-list a:hover,
.resource-list a:focus-visible {
  color: var(--accent);
}

.resource-list span {
  color: var(--muted);
  font-size: 13px;
}

.resource-list strong {
  font-size: 14px;
  text-align: right;
}

.privacy-section {
  display: grid;
  grid-template-columns: 0.6fr 1.4fr;
  gap: clamp(44px, 8vw, 110px);
}

.privacy-section .section-label {
  grid-column: 1 / -1;
  margin-bottom: -30px;
}

.privacy-section h2 {
  font-size: clamp(32px, 4.1vw, 56px);
}

.privacy-section > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

footer {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  justify-content: space-between;
  padding: 34px 0 42px;
  color: var(--ink-faint);
  font-size: 12px;
  line-height: 1.6;
  border-top: 1px solid var(--line);
}

footer p {
  max-width: 620px;
  margin-bottom: 0;
}

footer span {
  max-width: 100%;
  text-align: right;
}

.source-link {
  color: inherit;
  text-underline-offset: 0.2em;
}

.source-link:hover,
.source-link:focus-visible {
  color: var(--accent);
}

/* --- Jak to funguje: schéma sběru a jeho ovládání --- */

.how-section {
  padding: clamp(65px, 8vw, 105px) 0;
  border-top: 1px solid var(--line);
}

.how-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: clamp(10px, 1.6vw, 16px);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(155deg, var(--accent-wash), var(--tint-02));
}

.how-figure > object,
.how-figure > img {
  display: block;
  width: 100%;
  min-width: 900px;
  height: auto;
  aspect-ratio: 1200 / 770;
  border-radius: 14px;
}

.tuner {
  display: grid;
  gap: clamp(20px, 3vw, 28px);
  padding: clamp(22px, 3.4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--tint-02);
}

.tuner-head {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-start;
  justify-content: space-between;
}

.tuner-head h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 630;
  letter-spacing: -0.02em;
}

.tuner-head p {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.tuner-reset {
  min-height: 38px;
  padding: 0 16px;
  color: var(--ink-soft);
  font-family: inherit;
  font-size: 12px;
  font-weight: 660;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--key-face);
  box-shadow: 0 var(--key-lift-small) 0 var(--key-base);
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease,
    transform 90ms ease, box-shadow 90ms ease;
}

.tuner-reset:hover,
.tuner-reset:focus-visible {
  color: var(--ink);
  border-color: var(--accent);
  background: var(--key-face-hot);
}

.tuner-reset:active {
  transform: translateY(var(--key-lift-small));
  box-shadow: 0 0 0 var(--key-base);
}

.tuner-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.field {
  display: grid;
  gap: 7px;
  align-content: start;
  min-width: 0;
}

.field-wide {
  grid-column: span 2;
}

.field > label,
.field > .field-legend {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 640;
}

.field-source {
  display: block;
  color: var(--accent);
  font-size: 10px;
  font-weight: 680;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.field-input {
  display: flex;
  gap: 8px;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--scrim-soft);
  transition: border-color 160ms ease;
}

.field-input:focus-within {
  border-color: var(--accent);
}

.field-input input {
  width: 100%;
  min-width: 0;
  padding: 0;
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  border: 0;
  background: none;
}

.field-input input:focus {
  outline: none;
}

.field-input span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 11px;
}

.field-hint {
  color: var(--ink-faint);
  font-size: 11px;
  line-height: 1.45;
}

.field.is-invalid .field-input {
  border-color: var(--warn);
}

.field.is-invalid .field-hint {
  color: var(--warn);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chips button {
  min-height: 36px;
  padding: 0 14px;
  color: var(--ink-soft);
  font-family: inherit;
  font-size: 12px;
  font-weight: 620;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--key-face);
  box-shadow: 0 var(--key-lift-small) 0 var(--key-base);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, color 160ms ease,
    transform 90ms ease, box-shadow 90ms ease;
}

.chips button:hover {
  background: var(--key-face-hot);
}

/*
 * Volba ve skupině je zamáčknutá klávesa: sedí na základně, zatímco nevybrané stojí nad ní.
 * Nová volba tak sjede dolů a předchozí vyskočí zpět bez jediného řádku skriptu navíc.
 */
.chips button[aria-pressed="true"],
.chips button:active {
  transform: translateY(var(--key-lift-small));
  box-shadow: 0 0 0 var(--key-base);
}

.chips button[aria-pressed="true"] {
  color: var(--ink);
  border-color: var(--accent);
  background: var(--key-face-on);
}

.tuner-out {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.tuner-out div {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 20px 18px 20px 0;
}

.tuner-out div + div {
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.tuner-out strong {
  color: var(--accent-soft);
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
}

.tuner-out span {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

/* --- Datový slovník --- */

.doc-hero {
  padding: clamp(54px, 8vw, 88px) 0 clamp(34px, 5vw, 52px);
}

.doc-title {
  margin-bottom: 28px;
  font-size: clamp(40px, 6.4vw, 84px);
}

/*
    Nálepka s platností dokumentu. Dřív to byl obtažený chip v horní liště, jenže ten měl
    k dispozici jen zbytek řádku vedle značky a datum se v něm lámalo do dvou řádků. Tady
    má nad nadpisem celou šířku sloupce, drží se na jednom řádku a čte se dřív než titulek
    — u zásad je datum platnosti to první, co člověk hledá.

    Plná plocha, ne obrys: nálepka má ležet na dokumentu, ne být do něj vyrytá.
*/
.doc-stamp {
  display: inline-block;
  margin: 0 0 22px;
  padding: 11px 22px;
  color: var(--on-accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 6px 18px var(--shadow-soft);
}

.doc-layout {
  display: grid;
  grid-template-columns: 216px minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  padding: clamp(28px, 4vw, 46px) 0 clamp(46px, 7vw, 84px);
  border-top: 1px solid var(--line);
}

.doc-nav {
  position: sticky;
  top: 20px;
  display: grid;
  gap: 1px;
  align-self: start;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  scrollbar-width: thin;
}

.doc-nav-label {
  margin: 18px 0 6px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 680;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.doc-nav-label:first-child {
  margin-top: 0;
}

.doc-nav a {
  padding: 5px 0;
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
}

.doc-nav a:hover,
.doc-nav a:focus-visible {
  color: var(--ink);
}

.doc-body {
  min-width: 0;
}

.doc-body [id] {
  scroll-margin-top: 22px;
}

.doc-section {
  padding-bottom: clamp(36px, 5vw, 56px);
}

.doc-section + .doc-section {
  padding-top: clamp(32px, 4.5vw, 48px);
  border-top: 1px solid var(--line);
}

.doc-h2 {
  margin-bottom: 16px;
  font-size: clamp(26px, 3.4vw, 40px);
}

.doc-h3 {
  margin: 30px 0 12px;
  color: var(--accent-soft);
  font-size: 15px;
  font-weight: 640;
}

.doc-section p {
  max-width: 780px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.doc-sources {
  font-size: 12.5px;
}

.doc-pre {
  margin: 0 0 20px;
  padding: 18px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--scrim-soft);
}

.doc-pre code {
  display: block;
  padding: 0;
  color: var(--accent-text);
  font-size: 12px;
  line-height: 1.8;
  white-space: pre;
  background: none;
  border-radius: 0;
}

.keys {
  width: 100%;
  margin: 0 0 8px;
  font-size: 13px;
  border-collapse: collapse;
}

.keys th {
  padding: 10px 14px 10px 0;
  color: var(--muted);
  font-size: 10px;
  font-weight: 680;
  letter-spacing: 0.12em;
  text-align: left;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line);
}

.keys td {
  padding: 12px 14px 12px 0;
  overflow-wrap: anywhere;
  color: var(--ink-soft);
  line-height: 1.6;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.keys td:nth-child(2) {
  color: var(--muted);
  font-size: 12px;
}

.keys tr {
  scroll-margin-top: 22px;
}

.keys tr:target td {
  background: var(--accent-wash-strong);
  box-shadow: inset 2px 0 0 var(--accent);
}

.keys code {
  white-space: normal;
}

.c-key {
  width: 30%;
}

.c-type {
  width: 13%;
}

.doc-cell-note {
  color: var(--ink-faint);
  font-size: 12px;
}

.doc-back {
  margin: 0;
}

.doc-back a {
  font-size: 13px;
}

/* Odkazy v běžném textu obou stránek; bez toho by zůstala výchozí modrá prohlížeče. */
.doc-section a,
.doc-back a,
.how-section .section-heading-row p a,
.how-section .note a,
.tuner a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

.doc-section a:hover,
.doc-section a:focus-visible,
.doc-back a:hover,
.doc-back a:focus-visible,
.how-section .section-heading-row p a:hover,
.how-section .section-heading-row p a:focus-visible,
.how-section .note a:hover,
.how-section .note a:focus-visible,
.tuner a:hover,
.tuner a:focus-visible {
  color: var(--accent-soft);
}

@media (max-width: 1080px) {
  .doc-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .doc-nav {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    align-items: baseline;
    max-height: none;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
  }

  .doc-nav-label {
    width: 100%;
    margin: 8px 0 0;
  }
}

@media (max-width: 900px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 76px;
    margin-bottom: 68px;
  }

  /* Tlačítka pod text, ne vedle něj: v jednom řádku by se popisky lámaly. */
  .tester-call {
    grid-template-columns: minmax(0, 1fr);
  }

  .phone-showcase {
    height: 590px;
    justify-self: center;
  }

  .tuner-grid,
  .tuner-out {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .c-key {
    width: 34%;
  }

  .c-type {
    width: 16%;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-heading-row {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .section-heading-row > p {
    max-width: 640px;
  }
}

@media (max-width: 700px) {
  .how-section {
    padding: 62px 0;
  }

  .how-figure {
    width: calc(100vw - 16px);
    margin-right: calc(50% - 50vw);
    border-radius: 0;
    border-left: 0;
    border-right: 0;
  }

  .tuner-grid {
    grid-template-columns: 1fr;
  }

  .field-wide {
    grid-column: auto;
  }

  .tuner-out {
    grid-template-columns: 1fr;
  }

  .tuner-out div,
  .tuner-out div + div {
    padding: 16px 0;
    border-left: 0;
  }

  .tuner-out div + div {
    border-top: 1px solid var(--line);
  }

  .keys,
  .keys tbody,
  .keys tr,
  .keys td {
    display: block;
    width: auto;
  }

  .keys thead {
    display: none;
  }

  .keys tr {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

  /* Ve sloupcovém rozpadu nese zvýraznění řádek; na buňkách by pruh přejel první znak. */
  .keys tr:target {
    padding-left: 12px;
    background: var(--accent-wash-strong);
    box-shadow: inset 2px 0 0 var(--accent);
  }

  .keys tr:target td {
    background: none;
    box-shadow: none;
  }

  .keys td {
    padding: 0 0 4px;
    border-bottom: 0;
  }

  .keys td:first-child {
    font-size: 13px;
  }

  main {
    width: min(100% - 32px, 1180px);
  }

  .topbar {
    gap: 14px;
    min-height: 80px;
  }

  .brand {
    gap: 9px;
    font-size: 13px;
  }

  .status {
    gap: 6px;
    max-width: 146px;
    padding: 6px 9px;
    font-size: 9px;
    line-height: 1.35;
  }

  .topbar-end {
    gap: 8px;
  }

  .lang-switch {
    padding: 6px 9px;
    font-size: 9px;
  }

  .hero {
    padding: 68px 0 78px;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 76px;
    margin-bottom: 58px;
  }

  .phone-showcase {
    width: min(100%, 430px);
    height: 540px;
    justify-self: center;
  }

  .phone-frame-left {
    left: 24px;
  }

  .phone-frame-right {
    right: 24px;
  }

  .eyebrow,
  .section-label {
    margin-bottom: 18px;
    font-size: 10px;
    line-height: 1.5;
  }

  h1 {
    margin-bottom: 24px;
    font-size: clamp(42px, 13.5vw, 68px);
    line-height: 0.96;
    letter-spacing: -0.055em;
  }

  h2 {
    font-size: clamp(36px, 11vw, 54px);
    letter-spacing: -0.045em;
  }

  .lede {
    margin-bottom: 30px;
    font-size: 17px;
  }

  .hero-actions {
    display: grid;
    margin-bottom: 0;
  }

  .button {
    width: 100%;
  }

  .facts,
  .split-section,
  .feature-grid,
  .privacy-section {
    grid-template-columns: 1fr;
  }

  .facts article,
  .facts article + article {
    padding: 18px 0;
    border-left: 0;
  }

  .facts article + article {
    border-top: 1px solid var(--line);
  }

  .split-section,
  .feature-section,
  .resources-section,
  .privacy-section {
    padding: 62px 0;
  }

  .split-section {
    gap: 42px;
  }

  .install-card {
    padding: 22px 18px;
  }

  .build-meta,
  .metrics {
    grid-template-columns: 1fr;
  }

  .build-meta div,
  .build-meta div + div,
  .metrics div,
  .metrics div + div {
    padding: 14px 0;
    border-left: 0;
  }

  .build-meta div + div,
  .metrics div + div {
    border-top: 1px solid var(--line);
  }

  .feature-grid article {
    min-height: 0;
    padding: 24px 22px;
  }

  .feature-grid h3 {
    margin-top: 24px;
  }

  .privacy-section .section-label {
    grid-column: auto;
    margin-bottom: -22px;
  }

  .whatsnew-head {
    gap: 10px 14px;
  }

  /* Na mobilu je čtení pohodlnější zespodu, kde má panel plnou šířku i palec na dosah. */
  .changelog-dialog {
    width: 100vw;
    max-height: 86vh;
    max-height: 86dvh;
    margin: auto 0 0;
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 18px 18px 0 0;
  }

  .resource-list a {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .resource-list strong {
    text-align: left;
  }

  footer {
    flex-direction: column;
    gap: 18px;
  }

  footer span {
    text-align: left;
  }
}


@media (max-width: 390px) {
  .tester-actions .button {
    width: 100%;
  }

  .brand > span:last-child {
    max-width: 92px;
    line-height: 1.15;
  }

  .status {
    max-width: 126px;
  }

  h1 {
    font-size: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

/* Návod v nápovědě: číslovaný postup a výčet mezí. Sedí do stejné šířky jako odstavce
   dokumentace, aby řádek nebyl širší, než se dá přečíst bez ztráty řádku. */
.doc-steps,
.doc-list {
  max-width: 780px;
  margin: 0 0 4px;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.doc-steps li,
.doc-list li {
  margin-bottom: 10px;
  padding-left: 4px;
}

.doc-steps li::marker {
  color: var(--accent-soft);
  font-variant-numeric: tabular-nums;
  font-weight: 640;
}

.doc-list li::marker {
  color: var(--accent-soft);
}

.doc-steps strong,
.doc-list strong {
  color: var(--ink);
}

/* --- Ceník licencí --- */

/*
    Tři karty vedle sebe na šířku, pod sebe na telefonu. Prostřední je zvýrazněná obtahem, ne
    plochou: plná barva by z ní udělala tlačítko a oko by na ni sáhlo dřív než na cenu.
*/

@media (max-width: 720px) {
}