/* Shared header geometry for every MindAgo page. Load after page styles. */
:root {
  --header-height: 84px;
  --header-padding-x: 20px;
  --logo-height: 48px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  height: var(--header-height);
  min-height: var(--header-height);
  padding: 0;
  box-sizing: border-box;
  background: #fff;
  border-bottom: 1px solid rgba(0,0,0,.06);
  box-shadow: none;
  backdrop-filter: none;
}
.site-header__inner {
  position: relative;
  width: 100%;
  max-width: 1200px;
  height: 100%;
  min-height: 0;
  margin: 0 auto;
  padding: 0 var(--header-padding-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  box-sizing: border-box;
}
.site-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  text-decoration: none;
  line-height: 0;
}
.site-brand img {
  display: block;
  width: auto;
  height: var(--logo-height);
  max-width: 100%;
  object-fit: contain;
}
.site-header .links { flex-wrap: nowrap; }
@media (max-width:1024px) {
  :root { --header-height:76px; --logo-height:44px; --header-padding-x:18px; }
}
@media (max-width:768px) {
  :root { --header-height:70px; --logo-height:40px; --header-padding-x:16px; }
  .site-header .links { gap:0; max-width:none; }
  .site-header .links a { padding:.5rem; font-size:.85rem; }
}
@media (max-width:480px) {
  :root { --header-height:64px; --logo-height:36px; --header-padding-x:14px; }
}
/* Keep the existing homepage/books menu below the fixed-height bar. */
@media (max-width:52.99rem) {
  .site-header .site-nav {
    position:absolute;
    top:100%;
    left:0;
    width:100%;
    padding:1rem var(--header-padding-x);
    box-sizing:border-box;
    background:#fff;
    border-bottom:1px solid rgba(0,0,0,.06);
  }
}