/* ============================================================
 *  Location: /pages/shared/header/shared.header.css
 *  Function: Globalne style + style headera
 *  Version:  1.0.0
 *  Build:    2026-05-06.1
 * ============================================================ */

:root {
  --mu-primary: #1B1F3B;
  --mu-accent:  #FF4D2E;
  --mu-warm:    #F4EFE9;
  --mu-ink:     #0E1020;
  --mu-paper:   #FFFFFF;
  --mu-mute:    #5A5F75;
  --mu-line:    #E6E1DA;

  --mu-radius:  12px;
  --mu-shadow:  0 1px 0 rgba(14, 16, 32, 0.04), 0 8px 24px -8px rgba(14, 16, 32, 0.08);

  --mu-font-display: 'Bricolage Grotesque', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mu-font-body:    'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mu-font-serif:   'Fraunces', Georgia, serif;
}

* { box-sizing: border-box; }

body {
  font-family: var(--mu-font-body);
  color: var(--mu-ink);
  background: var(--mu-paper);
  line-height: 1.55;
  margin: 0;
  font-feature-settings: 'ss01', 'cv11';
}

h1, h2, h3, h4, h5 {
  font-family: var(--mu-font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
}

a { color: var(--mu-ink); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--mu-accent); }

.bg-default { background: var(--mu-paper); }
.bg-warm    { background: var(--mu-warm); }
.bg-dark    { background: var(--mu-ink); color: var(--mu-paper); }
.bg-accent  { background: var(--mu-accent); color: var(--mu-paper); }

.section { padding: clamp(3rem, 8vw, 6rem) 0; }

/* ----- Header ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--mu-line);
}

.navbar { padding-block: 1rem; }

.navbar-brand .brand-mark {
  font-family: var(--mu-font-display);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--mu-primary);
}

.navbar-nav { gap: .25rem; }

.nav-link {
  position: relative;
  font-weight: 500;
  font-size: .95rem;
  padding-block: .5rem !important;
  color: var(--mu-ink) !important;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -.25rem;
  height: 2px;
  background: var(--mu-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}

.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }

.visually-hidden-focusable {
  position: absolute;
  padding: .5rem 1rem;
  background: var(--mu-ink);
  color: var(--mu-paper);
  z-index: 9999;
  top: -10rem;
  left: 1rem;
}
.visually-hidden-focusable:focus { top: 1rem; }