/* ==========================================================================
   Header / Navigation — sticky, glasige Elevation, verdichtet beim Scrollen
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(244, 245, 244, 0.72);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border-bottom: 1px solid var(--color-line);
  transition: box-shadow var(--dur-base) var(--ease-out), padding var(--dur-base) var(--ease-out);
}
.site-header.is-scrolled {
  box-shadow: var(--elevation-3);
  border-bottom-color: transparent;
}
/* .primary-nav lebt innerhalb von .site-header (eigener Stacking-Context durch
   position:sticky). Ohne diese Anhebung würde der außerhalb liegende
   .nav-scrim (z-index 30) den fixed positionierten Drawer trotz höherem
   eigenen z-index optisch verdecken. */
.site-header.nav-is-open { z-index: var(--z-modal); }

/* backdrop-filter erzeugt einen Containing-Block, der den fixed positionierten
   Mobile-Drawer kappt/verfälscht (Rendering-Falle) -> auf Mobile deaktivieren. */
@media (max-width: 900px) {
  .site-header {
    background: var(--color-bg);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1.1rem;
  transition: padding var(--dur-base) var(--ease-out);
}
.site-header.is-scrolled .site-header__inner { padding-block: 0.65rem; }

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-ink);
  text-decoration: none;
  line-height: 1.15;
}
.site-logo:focus-visible { outline-offset: 4px; }
.site-logo__mark {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border-radius: var(--radius-sm);
  background: linear-gradient(155deg, var(--color-primary), var(--color-primary-strong));
  box-shadow: var(--elevation-2);
  display: grid;
  place-items: center;
  color: #fff;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}
.site-logo:hover .site-logo__mark { transform: translateY(-2px) rotate(-4deg); box-shadow: var(--elevation-3); }
.site-logo__text small { display: block; font-family: var(--font-body); font-weight: 500; font-size: 0.72rem; color: var(--color-ink-soft); letter-spacing: 0.03em; }

.primary-nav { display: flex; align-items: center; gap: 0.4rem; }
.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.primary-nav a {
  display: inline-block;
  padding: 0.6em 1em;
  border-radius: var(--radius-pill);
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.96rem;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.primary-nav a:hover { background: var(--color-surface); box-shadow: var(--elevation-1); }
.primary-nav .current-menu-item > a,
.primary-nav .current_page_item > a {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

.header-actions { display: flex; align-items: center; gap: 0.9rem; }
.header-phone {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--color-ink);
  text-decoration: none;
  font-size: 0.94rem;
}
.header-phone .icon { color: var(--color-accent); }

.burger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-line-strong);
  background: var(--color-surface);
  cursor: pointer;
  position: relative;
  flex: 0 0 auto;
}
.burger span {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform var(--dur-base) var(--ease-in-out), opacity var(--dur-fast) var(--ease-out), top var(--dur-base) var(--ease-in-out);
}
.burger span:nth-child(1) { top: 15px; }
.burger span:nth-child(2) { top: 21px; }
.burger span:nth-child(3) { top: 27px; }
.burger[aria-expanded="true"] span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

@media (max-width: 900px) {
  .burger { display: block; }
  .header-phone span:not(.icon) { display: none; }
  .header-actions .btn-primary { display: none; }
  .header-actions { gap: 0.6rem; }

  .primary-nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(86vw, 360px);
    height: 100dvh;
    background: var(--color-surface);
    box-shadow: var(--elevation-4);
    padding: 6.5rem 1.75rem 2rem;
    transform: translateX(100%);
    transition: transform var(--dur-slow) var(--ease-in-out);
    z-index: var(--z-modal);
    overflow-y: auto;
  }
  .primary-nav.is-open { transform: translateX(0); }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0.15rem; }
  .primary-nav a { padding: 0.95em 1em; font-size: 1.05rem; }

  .nav-scrim {
    position: fixed;
    inset: 0;
    background: rgba(16, 21, 29, 0.45);
    z-index: var(--z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur-base) var(--ease-out);
  }
  .nav-scrim.is-open { opacity: 1; visibility: visible; }
}

@media (max-width: 380px) {
  .header-phone { display: none; }
}

@media (min-width: 901px) {
  .nav-scrim, .burger { display: none; }
}