/* ============================================================
   LAYOUT – header, navigácia, footer. HTML generuje js/layout.js.
   Header je priehľadný nad hero (ako v koncepte); po odscrollovaní
   dostane tmavé pozadie (.is-scrolled pridáva js/main.js).
   ============================================================ */

/* --- Header --- */
.site-header {
  position: sticky; top: 0; z-index: 80;
  height: var(--header-h);
  color: var(--on-dark);
  background: transparent;
  transition: background var(--dur), box-shadow var(--dur);
}
.site-header.is-scrolled {
  background: rgba(11, 16, 32, .86);
  -webkit-backdrop-filter: blur(14px) saturate(140%); backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 1px 0 rgba(255,255,255,.08);
}
/* hero je pod headerom – posunie sa hore o výšku headeru (pages.css) */
.site-header .container { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.logo { display: inline-flex; align-items: center; gap: 11px; color: #fff; }
.logo:hover { color: #fff; }
.logo img { width: 30px; height: 30px; border-radius: 50%; }
.logo .brand { font-size: 21px; }
.logo .brand em { font-style: normal; font-weight: 400; color: var(--flow); }

/* Navigácia: mono, 12.5px, bez rámčekov – iba zmena opacity */
.nav { display: flex; align-items: center; gap: 34px; margin: 0 auto; padding: 0; list-style: none; }
.nav > li { position: relative; }
.nav ul { list-style: none; margin: 0; padding: 0; }
.nav-link {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 0;
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .04em; color: #fff;
  background: none; border: 0; opacity: .82; transition: opacity var(--dur);
}
.nav-link:hover, .nav-link[aria-expanded="true"], .nav-link.is-active { opacity: 1; }
.nav-link svg { width: 10px; height: 10px; transition: transform var(--dur); }
.nav-link[aria-expanded="true"] svg { transform: rotate(180deg); }

/* Dropdown „Produkty“ – tmavý skosený panel */
.dropdown {
  position: absolute; top: calc(100% + 14px); left: -18px; min-width: 300px; z-index: 5;
  background: var(--navy-800); padding: 8px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.14);
  clip-path: polygon(var(--cham-s) 0, 100% 0, 100% calc(100% - var(--cham-s)), calc(100% - var(--cham-s)) 100%, 0 100%, 0 var(--cham-s));
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
}
.dropdown.is-open { opacity: 1; visibility: visible; transform: none; }
.dropdown a { display: grid; gap: 3px; padding: 12px 14px; color: #fff; }
.dropdown a:hover { background: rgba(255,255,255,.07); color: #fff; }
.dropdown a strong { font-weight: 600; font-size: 14.5px; display: flex; align-items: center; gap: 10px; }
.dropdown a span { font-size: 12.5px; color: var(--on-dark-faint); }
.dropdown .tag { font-size: 9.5px; padding: 3px 8px; }
.dropdown .tag--soon { background: rgba(210,153,34,.2); color: #f2c25c; }

/* Pravá časť: jazyk + CTA */
.header-actions { display: flex; align-items: center; gap: 26px; }
.lang-switch { display: inline-flex; gap: 14px; font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .04em; }
.lang-switch button { background: none; border: 0; padding: 4px 0; color: #fff; opacity: .55; border-bottom: 1px solid transparent; transition: opacity var(--dur); }
.lang-switch button:hover { opacity: .9; }
.lang-switch button[aria-pressed="true"] { opacity: 1; border-bottom-color: var(--flow); }

/* Hamburger */
.nav-toggle { display: none; background: none; border: 0; padding: 8px; color: #fff; }
.nav-toggle svg { width: 26px; height: 26px; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; order: 3; }
  .header-actions { order: 2; }
  .header-actions .btn { display: none; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0; z-index: 79;
    flex-direction: column; align-items: stretch; gap: 0; margin: 0;
    background: var(--deep); box-shadow: 0 1px 0 var(--line-dark), 0 20px 40px rgba(0,0,0,.4);
    padding: var(--space-3) var(--gutter) var(--space-5);
    max-height: calc(100dvh - var(--header-h)); overflow-y: auto;
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
  }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav-link { width: 100%; justify-content: space-between; padding: 16px 0; font-size: 14px; border-bottom: 1px solid var(--line-dark); }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; clip-path: none; background: transparent; padding: 0 0 0 12px; display: none; }
  .dropdown.is-open { display: block; }
  .nav .mobile-cta { display: block; margin-top: var(--space-5); }
  .nav .mobile-cta .btn { width: 100%; }
}
@media (min-width: 901px) { .nav .mobile-cta { display: none; } }

/* --- Footer --- */
.site-footer { background: var(--deep); color: var(--on-dark-muted); padding: var(--space-8) 0 var(--space-6); font-size: 14px; border-top: 1px solid var(--line-dark); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: var(--space-7); margin-bottom: var(--space-7); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: var(--space-6); } }
.site-footer .tagline { margin-top: var(--space-4); max-width: 38ch; color: var(--on-dark-faint); }
.footer-col h4 { font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 400; letter-spacing: .14em; text-transform: uppercase; color: var(--on-dark-faint); margin-bottom: var(--space-4); }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .6em; }
.footer-col a, .footer-col button { color: var(--on-dark-muted); background: none; border: 0; padding: 0; font: inherit; text-align: left; }
.footer-col a:hover, .footer-col button:hover { color: #fff; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-5); justify-content: space-between; align-items: center; padding-top: var(--space-5); border-top: 1px solid var(--line-dark); color: var(--on-dark-faint); font-family: var(--font-mono); font-size: 12px; letter-spacing: .02em; }