/* Reset, typografia a rozloženie stránky. */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; }
h2 { font-size: clamp(30px, 4vw, 40px); }
h3 { font-size: 20px; }
p { margin: 0; }
a { color: inherit; }
a:hover { color: var(--accent-text); }
hr { border: 0; border-top: 1px solid var(--line); margin: 4px 0; }
pre { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

/* Rámik zamerania: tmavší jantár, aby mal kontrast aspoň 3 : 1 aj na bielom (WCAG 1.4.11). */
:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 3px; border-radius: 4px; }

/* Odkaz „Preskočiť na obsah“ – viditeľný len pri ovládaní klávesnicou. */
.skip-link {
  position: absolute; left: 12px; top: -100px; z-index: 10; padding: 10px 16px; border-radius: var(--radius-sm);
  background: var(--ink); color: var(--bg); font-weight: 600; text-decoration: none;
}
.skip-link:focus { top: 12px; color: var(--bg); }

.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: 88px; display: flex; flex-direction: column; gap: 40px; }
.section__head { display: flex; flex-direction: column; gap: 12px; max-width: 44em; }
.band { background: var(--bg-alt); border-block: 1px solid var(--line); }

.grid { display: grid; gap: 20px; }
.grid--cards { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--demo { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); align-items: stretch; }
.grid--steps { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.kicker { font-size: 15px; font-weight: 600; color: var(--accent-text); }
.lead { font-size: 19px; color: var(--muted); }
.lead--ink { color: var(--ink); }
.muted { color: var(--muted); }
.small { font-size: 14px; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0; padding: 0; margin: -1px;
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding-block: 64px; }
}