/* Wspólny nagłówek: strona główna i poradnik */

:root { --header-h: 72px; }

.site-header {
  position: sticky; top: 0; z-index: 1000;
  height: var(--header-h);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.site-header.is-scrolled, .site-header.is-solid { border-bottom-color: var(--line); }
.header-inner { height: 100%; display: flex; align-items: center; gap: 32px; }

.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand img { width: 44px; height: 44px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 1.125rem; font-variation-settings: "wdth" 118; }
.brand-text small { font-size: .8125rem; color: var(--steel); }

.main-nav { display: flex; gap: 26px; margin-left: auto; }
.main-nav a { color: var(--ink); text-decoration: none; font-size: .9375rem; font-weight: 500; padding: 6px 0; position: relative; white-space: nowrap; }
.main-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: var(--cobalt); transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
.main-nav a:hover::after, .main-nav a.is-active::after, .main-nav a[aria-current="page"]::after { transform: scaleX(1); }
.main-nav a[aria-current="page"] { color: var(--cobalt); }

.header-cta {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 42px; padding: 0 18px;
  font: 600 .9375rem/1 var(--font);
  color: #fff; background: var(--cobalt);
  border-radius: 999px; text-decoration: none; white-space: nowrap;
  transition: background-color .2s;
}
.header-cta:hover { background: var(--cobalt-dark); color: #fff; }

.nav-toggle { display: none; }

@media (max-width: 1180px) {
  .header-cta { display: none; }
}

@media (max-width: 920px) {
  :root { --header-h: 64px; }

  .nav-toggle {
    display: grid; place-items: center; margin-left: auto;
    width: 44px; height: 44px; padding: 0;
    background: transparent; border: 1px solid var(--line); border-radius: 10px; cursor: pointer;
  }
  .nav-toggle-bars, .nav-toggle-bars::before, .nav-toggle-bars::after {
    display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 1px;
    transition: transform .25s, background-color .25s;
  }
  .nav-toggle-bars { position: relative; }
  .nav-toggle-bars::before, .nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
  .nav-toggle-bars::before { top: -6px; }
  .nav-toggle-bars::after { top: 6px; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; gap: 0; margin: 0;
    padding: 8px var(--gutter) 24px;
    background: #fff; border-bottom: 1px solid var(--line);
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: transform .25s, opacity .25s, visibility .25s;
  }
  .main-nav.is-open { transform: none; opacity: 1; visibility: visible; }
  .main-nav a { padding: 14px 0; font-size: 1.0625rem; border-bottom: 1px solid var(--line); }
  .main-nav a::after { display: none; }
}

@media (max-width: 560px) {
  .brand-text small { display: none; }
}