/* OSCloud sdílená navigace — oscloud.cz, blog.oscloud.cz, docs.oscloud.cz
   Jeden zdroj pravdy: https://oscloud.cz/assets/nav.css (+ nav.js) */

.os-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #E2E8F0;
  font-family: var(--os-body, 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif);
  line-height: 1.4;
  text-align: left;
}
.os-nav, .os-nav *, .os-nav *::before, .os-nav *::after { box-sizing: border-box; }

/* na blogu a v docs je lišta nad stránkou a nelepí se (jejich vlastní hlavička je sticky) */
.os-nav--static { position: relative; }

.os-nav__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.os-nav--static .os-nav__inner { height: 52px; }

.os-nav .os-logo { display: inline-flex; align-items: center; text-decoration: none; }
.os-nav .os-logo img { display: block; height: 24px; width: auto; max-width: none; margin: 0; }

.os-nav .os-links { display: flex; gap: 24px; align-items: center; margin: 0; padding: 0; }
.os-nav .os-links a {
  color: #334155;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  box-shadow: none;
  border: 0;
  background: none;
  padding: 0;
}
.os-nav .os-links a:hover,
.os-nav .os-links a[aria-current] { color: #2563EB; }

.os-nav .os-links a.os-cta {
  background: #2563EB;
  color: #fff;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.85rem;
  transition: background 0.2s;
}
.os-nav .os-links a.os-cta:hover { background: #1D4ED8; color: #fff; }

.os-nav .os-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
  margin: 0;
}
.os-nav .os-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #0F172A;
  margin: 5px 0;
  transition: 0.3s;
}
.os-nav .os-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.os-nav .os-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.os-nav .os-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.os-nav a:focus-visible, .os-nav button:focus-visible { outline: 3px solid #3B82F6; outline-offset: 2px; }

@media (max-width: 768px) {
  .os-nav .os-links { display: none; }
  .os-nav .os-links.open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    padding: 20px 16px;
    border-bottom: 1px solid #E2E8F0;
    gap: 16px;
  }
  .os-nav .os-toggle { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  .os-nav .os-toggle span, .os-nav .os-links a.os-cta { transition: none; }
}