/*
  New Header (v5), applied site-wide across all pages.
  Renamed from Astra's .header-inner to .site-header-inner because
  ../style.css already defines .header-inner for the legacy header.
  On regular pages the header is always the solid/frosted variant
  (matches the legacy header's always-opaque behaviour so the hardcoded
  "margin-top: 68px" offsets throughout style.css keep working).
  body.is-top (index.html only) switches it to the transparent-over-FlowLight
  variant from the approved v5 screenshots.
*/
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(24,43,84,.04);
  transition: background var(--duration-hover), box-shadow var(--duration-hover), height var(--duration-hover);
}
body.is-top .site-header {
  position: absolute;
  background: transparent;
  backdrop-filter: none;
  box-shadow: none;
}
body.is-top .site-header.scrolled {
  position: fixed;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(24,43,84,.04);
}
.site-header-inner {
  height: 100%;
  margin-inline: clamp(26px,4.5vw,76px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}
.site-header .wordmark { flex: none; }
.site-header .wordmark img { display: block; width: 200px; height: auto; }
.site-header .desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(25px,3.1vw,49px);
  font-family: var(--font-latin);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: .01em;
  color: var(--primary-text);
}
.site-header .desktop-nav a { color: inherit; padding-block: 14px; transition: color var(--duration-hover); }
.site-header .desktop-nav a:hover,
.site-header .desktop-nav a.active { color: #5f72cd; }
.site-header .contact-link { display: flex; align-items: center; gap: 11px; }
.site-header .arrow { font-size: 17px; transition: transform var(--duration-hover) var(--easing); }
.site-header .contact-link:hover .arrow { transform: translate(2px,-2px); }
.site-header .menu-toggle { display: none; }
.site-header .mobile-nav[hidden] { display: none; }

@media (max-width: 1120px) {
  .site-header .wordmark img { width: 180px; }
}
@media (max-width: 900px) {
  .site-header .desktop-nav { gap: 19px; font-size: 12px; }
  .site-header-inner { gap: 22px; }
  .site-header .wordmark img { width: 170px; }
}
@media (max-width: 760px) {
  .site-header-inner { margin-inline: 24px; }
  .site-header .wordmark img { width: 177px; }
  .site-header .desktop-nav { display: none; }
  .site-header .menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 7px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: none;
    border: 0;
    cursor: pointer;
  }
  .site-header .menu-toggle span {
    height: 1px;
    width: 24px;
    background: var(--primary-text);
    transition: transform var(--duration-hover);
  }
  .site-header .menu-toggle[aria-expanded=true] span:first-child { transform: translateY(4px) rotate(45deg); }
  .site-header .menu-toggle[aria-expanded=true] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .site-header .mobile-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255,255,255,.98);
    padding: 12px 26px 28px;
    box-shadow: 0 18px 24px rgba(25,35,65,.05);
    z-index: 999;
  }
  .site-header .mobile-nav a {
    display: flex;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid var(--op-border);
    font-family: var(--font-latin);
    font-size: 15px;
    color: var(--primary-text);
  }
  .site-header .mobile-nav a.active { color: #5f72cd; }
}