/* =========================================================
   SIAŘ – prodejní jednostránka
   Plain CSS, bez build kroku a bez externích závislostí.

   Vizuál navazuje na latency.cz: stejná paleta (modrá #0071e3 na neutrální
   šedé škále), stejné písmo, plně zaoblená tlačítka, měkké stíny místo linek
   a poloprůhledná hlavička s rozostřením.
   ========================================================= */

:root {
  /* --- barvy (převzato z latency.cz) --- */
  --color-primary: #0071e3;
  --color-primary-hover: #0077ed;
  --color-primary-light: #e8f4fd;
  --color-primary-bright: #4ea3f5;
  /* Značková modrá má na bílé jen 4,41:1. Na ploše tlačítka to nevadí (bílý
     text na ní vychází 4,81:1), jako barva textu ale nesplňuje WCAG AA —
     odkazy, nadpisky a fajfky proto berou o stupeň tmavší odstín (5,6:1). */
  --color-primary-text: #0066cc;
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f7;
  --color-gray-200: #e8e8ed;
  --color-gray-300: #d2d2d7;
  --color-gray-400: #86868b;
  /* Oproti latency.cz o kousek tmavší: původní #6e6e73 má na světle šedém
     pozadí sekcí jen 4,40:1. Okem nepoznat, kontrast projde. */
  --color-gray-500: #64646a;
  --color-gray-600: #424245;
  --color-gray-700: #1d1d1f;
  /* Sekundární text na tmavých sekcích. Šedá 400 by tam měla jen 4,45:1. */
  --color-gray-on-dark: #a1a1a6;

  /* --- písmo --- */
  --font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --fs-xs: .75rem;
  --fs-sm: .875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 2rem;
  --fs-4xl: 2.5rem;
  /* Titulek je tu delší než na latency.cz, proto mírnější strop než tamní
     clamp(2.5rem, 8vw, 5.5rem) — jinak by na desktopu přetékal. */
  --fs-hero: clamp(2rem, 1.25rem + 2.2vw, 3.25rem);

  /* --- rozestupy --- */
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* --- tvary --- */
  --radius-sm: .375rem;
  --radius-md: .5rem;
  --radius-lg: .75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);

  --transition-fast: .15s ease;
  --transition-base: .3s ease;

  --maxw: 1200px;
  --maxw-narrow: 900px;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

html, body { overflow-x: hidden; }

body {
  margin: 0;
  background: var(--color-white);
  color: var(--color-gray-600);
  font-family: var(--font-family);
  font-size: var(--fs-base);
  font-weight: 400;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.is-locked { overflow: hidden; }

h1, h2, h3, h4 {
  color: var(--color-gray-700);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.02em;
  margin: 0 0 var(--space-4);
}
h1 { font-size: var(--fs-hero); font-weight: 700; line-height: 1.05; letter-spacing: -.03em; }
h2 { font-size: clamp(1.6rem, 1.15rem + 1.5vw, var(--fs-4xl)); font-weight: 700; }
h3 { font-size: var(--fs-xl); }

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

a { color: var(--color-primary-text); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary); }

img, svg { max-width: 100%; }
img { height: auto; display: block; }

.mono { font-family: var(--font-mono); font-size: .9em; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
.section-dark :focus-visible,
.section-demo :focus-visible { outline-color: var(--color-white); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 400;
  background: var(--color-white); color: var(--color-gray-700); font-weight: 600;
  padding: 10px 18px; border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-lg); transition: top var(--transition-fast);
}
.skip-link:focus { top: 0; }

.svg-sprite { display: none; }

.ico {
  width: 22px; height: 22px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.7;
  stroke-linecap: round; stroke-linejoin: round;
}
.ico-lg { width: 26px; height: 26px; }
.ico-inline { width: 17px; height: 17px; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container-narrow { max-width: var(--maxw-narrow); }

/* ---------- Hlavička ---------- */
.site-header {
  position: sticky; top: 0; z-index: 300;
  background: rgba(255, 255, 255, .8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, .04);
}
.header-inner {
  display: flex; align-items: center; gap: var(--space-6);
  height: var(--header-h);
}

.brand {
  display: flex; align-items: center; gap: var(--space-3);
  color: var(--color-gray-700); text-decoration: none; margin-right: auto;
}
.brand img { height: 22px; width: auto; }
.brand-text {
  display: flex; align-items: baseline; gap: var(--space-2);
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-gray-300);
}
.brand-text strong {
  font-size: var(--fs-lg); font-weight: 700;
  letter-spacing: -.02em; color: var(--color-gray-700);
}
.brand-sub { font-size: var(--fs-sm); color: var(--color-gray-400); }

.nav-toggle {
  display: none; align-items: center; gap: var(--space-2);
  background: transparent; border: 0; padding: var(--space-2);
  font: inherit; font-size: var(--fs-sm); font-weight: 500;
  color: var(--color-gray-600); cursor: pointer;
}
.nav-toggle-bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle-bars span {
  display: block; height: 2px; border-radius: 2px; background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
/* Otevřené menu: z hamburgeru se stane křížek. */
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-nav { display: flex; align-items: center; gap: var(--space-4); }
.nav-list {
  display: flex; align-items: center; gap: var(--space-1);
  list-style: none; margin: 0; padding: 0;
}
.nav-list a {
  display: block; padding: var(--space-2) var(--space-4);
  font-size: var(--fs-sm); font-weight: 500;
  color: var(--color-gray-600); border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}
.nav-list a:hover { color: var(--color-gray-700); background: var(--color-gray-100); }
.nav-list a[aria-current="true"] { color: var(--color-primary-text); background: var(--color-primary-light); }

/* ---------- Tlačítka ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: inherit; font-size: var(--fs-sm); font-weight: 500;
  line-height: 1; text-decoration: none; white-space: nowrap;
  border: 1px solid transparent; border-radius: var(--radius-full);
  cursor: pointer; transition: all var(--transition-base);
}
.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--fs-sm); }
.nav-cta { flex: none; }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--fs-base); }
.btn-block { display: flex; width: 100%; }

.btn-primary { background: var(--color-primary); color: var(--color-white); }
.btn-primary:hover { background: var(--color-primary-hover); color: var(--color-white); transform: scale(1.02); }

/* Hlavní akce je „Vyzkoušet demo“. Nese ji stejná modrá jako na latency.cz,
   jen ve větší velikosti; oranžový akcent původního návrhu se do téhle
   palety nehodil. */
.btn-accent {
  background: var(--color-primary); color: var(--color-white);
  padding: var(--space-4) var(--space-8); font-size: var(--fs-base);
}
.btn-accent:hover { background: var(--color-primary-hover); color: var(--color-white); transform: scale(1.02); }

.btn-outline { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: var(--color-white); }

.btn-ghost {
  background: transparent; color: var(--color-gray-700);
  border-color: var(--color-gray-300);
  padding: var(--space-4) var(--space-8); font-size: var(--fs-base);
}
.btn-ghost:hover { background: var(--color-gray-100); color: var(--color-gray-700); border-color: var(--color-gray-400); }

.section-dark .btn-ghost,
.section-demo .btn-ghost { color: var(--color-white); border-color: rgba(255, 255, 255, .35); }
.section-dark .btn-ghost:hover,
.section-demo .btn-ghost:hover { background: rgba(255, 255, 255, .1); color: var(--color-white); border-color: rgba(255, 255, 255, .6); }

/* ---------- Sekce ---------- */
.section { padding-block: var(--space-20); }
.section-alt { background: var(--color-gray-50); }
.section-dark,
.section-demo {
  background: linear-gradient(135deg, var(--color-gray-700) 0%, var(--color-black) 100%);
  color: var(--color-gray-300);
}
.section-dark h2, .section-dark h3,
.section-demo h2, .section-demo h3 { color: var(--color-white); }

.section-head { max-width: 720px; margin-bottom: var(--space-12); }
.section-head h2 { margin-bottom: var(--space-4); }
.section-sub { font-size: var(--fs-lg); color: var(--color-gray-500); margin: 0; }
.section-head-dark .section-sub { color: var(--color-gray-on-dark); }

.eyebrow {
  display: inline-block; margin: 0 0 var(--space-4);
  font-size: var(--fs-sm); font-weight: 600;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--color-primary-text);
}
.section-dark .eyebrow, .section-demo .eyebrow { color: var(--color-primary-bright); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-block: var(--space-20) var(--space-16);
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 113, 227, .10), transparent),
    radial-gradient(ellipse 60% 40% at 85% 40%, rgba(102, 126, 234, .07), transparent);
}
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--space-16); align-items: center;
}
.hero h1 { margin-bottom: var(--space-6); }
.hero-lead {
  font-size: var(--fs-lg); color: var(--color-gray-500);
  line-height: 1.7; max-width: 560px; margin-bottom: var(--space-8);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-8); }
.hero-facts { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); }
.hero-facts li {
  position: relative; padding-left: var(--space-6);
  font-size: var(--fs-sm); color: var(--color-gray-500);
}
.hero-facts li::before {
  content: "✓"; position: absolute; left: 0;
  color: var(--color-primary-text); font-weight: 700;
}

/* ---------- Snímky obrazovky ---------- */
.shot { margin: 0; }
.shot-frame {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden; background: var(--color-white);
  box-shadow: var(--shadow-lg);
}
.shot-bar {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-gray-100);
  border-bottom: 1px solid var(--color-gray-200);
}
.shot-bar .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--color-gray-300); flex: none;
}
.shot-url {
  margin-left: var(--space-3);
  font-family: var(--font-mono); font-size: var(--fs-xs);
  color: var(--color-gray-400);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.shot-frame img { width: 100%; display: block; cursor: zoom-in; }
.shot figcaption {
  margin-top: var(--space-3);
  font-size: var(--fs-sm); color: var(--color-gray-500);
}
.shot-hero .shot-frame { box-shadow: var(--shadow-xl); }

/* ---------- Mřížky a karty ---------- */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}
.card h3 { margin-bottom: var(--space-3); }
.section-alt .card { border-color: transparent; }

/* ---------- Problémy ---------- */
.problem {
  background: var(--color-gray-50);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}
.section-alt .problem { background: var(--color-white); }
.problem-now { color: var(--color-gray-600); margin-bottom: var(--space-4); }
.problem-fix {
  margin: 0; padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
  font-size: var(--fs-sm); color: var(--color-gray-500);
}
.fix-label {
  display: inline-flex; align-items: center; gap: var(--space-1);
  margin-right: var(--space-2);
  font-size: var(--fs-xs); font-weight: 600;
  text-transform: uppercase; letter-spacing: .06em;
  color: var(--color-primary-text);
}

/* ---------- Střídavé řádky s obrázkem ---------- */
.rows { display: grid; gap: var(--space-20); }
.row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--space-16); align-items: center;
}
.row-reverse .row-media { order: -1; }
.row-kicker {
  display: inline-block; margin-bottom: var(--space-3);
  font-size: var(--fs-xs); font-weight: 600;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--color-primary-text);
}
.row-text h3 { font-size: var(--fs-2xl); margin-bottom: var(--space-4); }
.row-text p { color: var(--color-gray-500); }

/* ---------- Odrážky s fajfkou ---------- */
.ticks { list-style: none; margin: var(--space-4) 0 0; padding: 0; }
.ticks li {
  position: relative; padding: var(--space-1) 0 var(--space-1) var(--space-6);
  font-size: var(--fs-sm); color: var(--color-gray-500);
}
.ticks li::before {
  content: "✓"; position: absolute; left: 0; top: var(--space-1);
  color: var(--color-primary-text); font-weight: 700;
}
.ticks-lg li { font-size: var(--fs-base); }
.ticks-lg li + li { margin-top: var(--space-2); }
.ticks-lg strong { color: var(--color-gray-700); font-weight: 600; }

.section-dark .ticks li, .section-demo .ticks li { color: var(--color-gray-on-dark); }
.section-dark .ticks-lg strong, .section-demo .ticks-lg strong { color: var(--color-white); }
.section-dark .ticks li::before, .section-demo .ticks li::before { color: var(--color-primary-bright); }
.section-dark .shot figcaption, .section-demo .shot figcaption { color: var(--color-gray-on-dark); }

/* ---------- Administrace ---------- */
.admin-lead { font-size: var(--fs-lg); color: var(--color-gray-500); max-width: 720px; }
.admin-shot-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-10); }
.admin-shot-card h3 {
  display: flex; align-items: center; gap: var(--space-2);
  font-size: var(--fs-lg); margin-bottom: var(--space-2);
}
.admin-shot-card h3 .ico { color: var(--color-primary-text); }
.admin-shot-card p { font-size: var(--fs-sm); color: var(--color-gray-500); margin-bottom: var(--space-4); }

/* ---------- Kroky ---------- */
.steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-8);
  list-style: none; margin: 0; padding: 0;
}
.step { position: relative; }
.step h3 { font-size: var(--fs-lg); margin-bottom: var(--space-2); }
.step p { font-size: var(--fs-sm); color: var(--color-gray-500); }
.step-num {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; margin-bottom: var(--space-4);
  border-radius: 50%; background: var(--color-primary); color: var(--color-white);
  font-weight: 600; font-size: var(--fs-base);
}
.step::before {
  content: ""; position: absolute; top: 20px; left: 52px; right: -20px;
  height: 1px; background: var(--color-gray-200);
}
.step:last-child::before { display: none; }

/* ---------- Bezpečnost ---------- */
/* Dvě sloupce, ne tři jako říká třída v HTML — popisky jsou dlouhé a ve třech
   sloupcích by se lámaly po dvou slovech. */
.sec-list {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6);
  list-style: none; margin: 0; padding: 0;
}
/* Ikona, nadpis a odstavec jsou přímí potomci <li>. Mřížka drží ikonu vlevo
   přes oba řádky, text pod sebou — prostý flex by je poskládal vedle sebe. */
.sec-item {
  display: grid; grid-template-columns: auto 1fr;
  column-gap: var(--space-4); row-gap: var(--space-1);
  padding: var(--space-6);
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius-xl);
}
.sec-item .ico-lg { grid-row: 1 / span 2; color: var(--color-primary-bright); flex: none; }
.sec-item h3 { font-size: var(--fs-base); margin-bottom: var(--space-1); }
.sec-item p { font-size: var(--fs-sm); color: var(--color-gray-on-dark); margin: 0; }

/* ---------- Nasazení ---------- */
.deploy { display: grid; grid-template-columns: 1.3fr 1fr; gap: var(--space-12); align-items: start; }
.deploy-aside h3 { font-size: var(--fs-lg); margin-bottom: var(--space-4); }
.plain { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); }
.plain li {
  display: flex; align-items: flex-start; gap: var(--space-3);
  font-size: var(--fs-sm); color: var(--color-gray-500);
}
.plain .ico { color: var(--color-primary-text); margin-top: 1px; }
.deploy-note {
  margin-top: var(--space-6); padding: var(--space-5);
  background: var(--color-primary-light);
  border-radius: var(--radius-xl);
  font-size: var(--fs-sm); color: var(--color-gray-600);
}

/* ---------- Pro koho ---------- */
.who h3 { font-size: var(--fs-lg); margin-bottom: var(--space-2); }
.who p { font-size: var(--fs-sm); color: var(--color-gray-500); margin: 0; }

/* ---------- Demo ---------- */
.demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; }
.demo-head { margin-bottom: var(--space-8); }
.demo-hint { font-size: var(--fs-sm); color: var(--color-gray-on-dark); }
.persona-list {
  display: grid; gap: var(--space-4);
  list-style: none; margin: 0 0 var(--space-8); padding: 0;
}
.persona {
  padding: var(--space-5);
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius-xl);
}
.persona h3 { font-size: var(--fs-base); margin-bottom: var(--space-1); }
.persona p { font-size: var(--fs-sm); color: var(--color-gray-on-dark); margin: 0; }
.persona-cred {
  display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-4);
  margin-top: var(--space-3); font-size: var(--fs-sm); color: var(--color-gray-300);
}
.persona-cred .mono { color: var(--color-gray-300); }
.demo-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: center; }
.demo-url { font-family: var(--font-mono); font-size: var(--fs-sm); color: var(--color-gray-on-dark); }

/* ---------- Časté dotazy ---------- */
.faq { display: grid; gap: var(--space-3); }
.faq details {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  font-weight: 500; color: var(--color-gray-700);
  cursor: pointer; list-style: none;
  transition: background var(--transition-fast);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { background: var(--color-gray-50); }
.faq-chevron { color: var(--color-gray-400); transition: transform var(--transition-base); }
.faq details[open] .faq-chevron { transform: rotate(180deg); }
.faq-body { padding: 0 var(--space-6) var(--space-5); }
.faq-body p { font-size: var(--fs-sm); color: var(--color-gray-500); }

/* ---------- Kontakt ---------- */
.contact { text-align: center; max-width: 700px; margin-inline: auto; }
.contact-lead { font-size: var(--fs-lg); color: var(--color-gray-500); margin-bottom: var(--space-8); }
.contact-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: center; margin-bottom: var(--space-6); }
.contact-mail { font-size: var(--fs-sm); color: var(--color-gray-500); }

/* ---------- Patička ---------- */
.site-footer {
  background: var(--color-gray-700);
  color: var(--color-gray-on-dark);
  padding-block: var(--space-12) var(--space-8);
}
.footer-inner { display: grid; gap: var(--space-4); }
.footer-brand {
  display: flex; align-items: center; gap: var(--space-3);
  color: var(--color-white); font-size: var(--fs-sm); margin: 0;
}
/* Logo je jednobarevné černé, na tmavé patičce se proto překlápí na bílé. */
.footer-brand img { height: 20px; width: auto; filter: brightness(0) invert(1); }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-6); margin: 0; }
.site-footer a { color: var(--color-gray-on-dark); font-size: var(--fs-sm); }
.site-footer a:hover { color: var(--color-white); }
.footer-note {
  margin: 0; padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: var(--fs-sm); color: var(--color-gray-on-dark);
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 500;
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-6);
  background: rgba(0, 0, 0, .8);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.lightbox[hidden] { display: none; }
.lightbox-inner { max-width: 1200px; width: 100%; }
.lightbox img {
  width: 100%; max-height: 80vh; object-fit: contain;
  border-radius: var(--radius-lg); background: var(--color-white);
  box-shadow: var(--shadow-xl);
}
.lightbox-caption { margin: var(--space-4) 0 0; text-align: center; font-size: var(--fs-sm); color: var(--color-gray-300); }
.lightbox-close {
  display: inline-flex; align-items: center; gap: var(--space-2);
  margin: 0 0 var(--space-4) auto;
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, .12); color: var(--color-white);
  border: 0; border-radius: var(--radius-full);
  font: inherit; font-size: var(--fs-sm); cursor: pointer;
  transition: background var(--transition-fast);
}
.lightbox-close:hover { background: rgba(255, 255, 255, .22); }

/* =========================================================
   Responzivita
   ========================================================= */
@media (max-width: 992px) {
  .hero-grid, .row, .demo-grid { grid-template-columns: 1fr; gap: var(--space-10); }
  .row-reverse .row-media { order: 0; }
  .hero-lead { max-width: none; }
  .deploy { grid-template-columns: 1fr; gap: var(--space-8); }
  .steps { grid-template-columns: repeat(2, 1fr); gap: var(--space-8) var(--space-6); }
  .step::before { display: none; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .admin-shot-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .rows { gap: var(--space-16); }
}

@media (max-width: 768px) {
  .section { padding-block: var(--space-16); }
  .nav-toggle { display: inline-flex; }
  /* Zavřené menu je jen odsunuté mimo obrazovku, takže by v něm odkazy
     zůstaly dosažitelné tabulátorem a čtečkou. Skrývá je proto visibility,
     která se na rozdíl od display dá animovat spolu s posunem. */
  .site-nav {
    position: fixed; inset: var(--header-h) 0 0;
    flex-direction: column; align-items: stretch; justify-content: flex-start;
    gap: 0; padding: var(--space-6);
    background: var(--color-white);
    overflow-y: auto;
    visibility: hidden;
    transform: translateX(100%);
    transition: transform var(--transition-base), visibility var(--transition-base);
    z-index: 299;
  }
  .site-nav.is-open { visibility: visible; transform: translateX(0); }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-list li { border-bottom: 1px solid var(--color-gray-100); }
  .nav-list li:last-child { border-bottom: 0; }
  .nav-list a { padding: var(--space-4); border-radius: 0; font-size: var(--fs-lg); }
  .nav-cta { margin-top: var(--space-6); }
  .grid-2, .grid-3, .grid-4, .sec-list { grid-template-columns: 1fr; }
  .hero-actions .btn, .contact-actions .btn { width: 100%; }
}

@media (max-width: 560px) {
  .container { padding-inline: var(--space-4); }
  .brand-sub { display: none; }
  .steps { grid-template-columns: 1fr; }
  .card { padding: var(--space-6); }
  .footer-links { gap: var(--space-4); }
}