/* Shared navigation: destinations lead; imagery supports the reading path. */
.top-navigation {
  --nav-width: 1320px;
  --nav-inset: 64px;
  --nav-space-small: 12px;
  --nav-space-group: 24px;
  --nav-space-panel: 32px;
  --nav-muted: color-mix(in oklab, var(--color-base-content) 76%, var(--color-base-100));
  position: relative;
  z-index: 45;
  background: var(--color-base-100);
  border-block: 1px solid var(--color-base-300);
  color: var(--color-base-content);
}
.top-nav-inner {
  width: min(var(--nav-width), calc(100% - var(--nav-inset)));
  min-height: 88px;
  margin: auto;
  display: flex;
  align-items: center;
  gap: var(--nav-space-group);
}
.nav-brand { display: flex; align-items: center; gap: var(--nav-space-small); white-space: nowrap; text-decoration: none; font-size: 1rem; font-weight: 650; letter-spacing: -.025em; }
.top-navigation .nav-brand { color: var(--color-base-content); }
.nav-brand img { border-radius: 50%; width: 36px; height: 36px; flex-shrink: 0; }
.nav-domain { color: var(--color-secondary); }
.top-navigation .site-megamenu { flex: 1; gap: 4px; position: static; min-width: 0; }
.site-megamenu > [popovertarget] { font: inherit; font-size: .88rem; font-weight: 600; min-height: 48px; white-space: nowrap; padding-inline: var(--nav-space-small); background: none; border-radius: var(--radius-field); color: inherit; }
.site-megamenu > [popovertarget]:hover, .site-megamenu > [aria-expanded=true] { background: var(--color-base-200); color: var(--color-secondary); }
.top-navigation .megamenu-active { display: none; }
.top-navigation .nav-panel {
  position: fixed;
  position-area: none;
  position-anchor: auto;
  inset: var(--nav-panel-top, 100px) 0 auto;
  width: min(var(--nav-width), calc(100% - var(--nav-inset)));
  margin: 0 auto;
  max-height: calc(100dvh - var(--nav-panel-top, 100px) - 16px - env(safe-area-inset-bottom));
  max-block-size: calc(100dvh - var(--nav-panel-top, 100px) - 16px - env(safe-area-inset-bottom));
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--color-secondary) var(--color-base-200);
  background: var(--color-base-100);
  border: 0;
  border-radius: 12px;
  box-shadow: 0 20px 64px color-mix(in oklab, var(--color-base-100) 88%, transparent);
  color: var(--color-base-content);
  padding: 0;
}
.nav-panel-grid { display: grid; grid-template-columns: 1fr 1fr .88fr; gap: var(--nav-space-panel); padding: var(--nav-space-panel); }
#nav-action .nav-panel-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.nav-column { min-width: 0; }
.nav-column h2 { margin: 0 0 var(--nav-space-small); padding: 0 var(--nav-space-small) var(--nav-space-small); border-bottom: 1px solid var(--color-base-300); font: inherit; font-size: .88rem; line-height: 1.5; font-weight: 650; letter-spacing: 0; color: var(--color-secondary); }
.nav-column .menu { padding: 0; width: 100%; gap: 4px; font-size: .94rem; flex-wrap: nowrap; }
.nav-column .menu li > a, .nav-column .menu li > button { display: flex; align-items: center; justify-content: space-between; gap: var(--nav-space-small); border-radius: var(--radius-field); padding: var(--nav-space-small); min-height: 48px; text-decoration: none; font: inherit; line-height: 1.5; background: none; color: var(--color-base-content); white-space: normal; cursor: pointer; border: 0; text-align: left; }
.nav-column .menu li > a > span, .nav-column .menu li > button > span { min-width: 0; overflow-wrap: anywhere; }
.nav-column .menu li > a:hover, .nav-column .menu li > button:hover { background: var(--color-base-200); color: var(--color-secondary); }
.nav-column .menu small { display: block; color: var(--nav-muted); font-size: .8rem; margin-top: 4px; line-height: 1.55; }
.top-navigation .nav-icon { width: 18px; height: 18px; flex-shrink: 0; display: inline-block; vertical-align: middle; }
.nav-column .nav-icon { color: var(--color-secondary); opacity: .65; }
.nav-column a:hover .nav-icon, .nav-column button:hover .nav-icon { opacity: 1; }
.nav-feature { display: flex; flex-direction: column; align-items: start; justify-content: start; align-self: stretch; gap: 18px; border-radius: 12px; padding: var(--nav-space-group); background: var(--color-base-200); text-decoration: none; min-width: 0; }
.top-navigation .nav-feature { color: var(--color-base-content); }
.nav-feature strong { font-family: Georgia, 'Times New Roman', serif; font-size: 1.55rem; line-height: 1.25; letter-spacing: -.02em; font-weight: 400; text-wrap: balance; }
.nav-feature p { font-size: .84rem; line-height: 1.65; margin: 0; color: var(--nav-muted); }
.nav-feature > a, .nav-feature > span { display: flex; align-items: center; gap: var(--nav-space-small); margin-top: auto; min-height: 44px; font-size: .82rem; color: var(--color-secondary); text-decoration: none; line-height: 1.5; }
.nav-feature-dryas { background: linear-gradient(180deg, color-mix(in oklab, var(--color-base-100) 91%, transparent), color-mix(in oklab, var(--color-base-100) 80%, transparent)), url('/assets/dryas-hero-storm.jpg') 70% center / cover; }
.nav-feature-dryas:hover > span, .nav-feature > a:hover { text-decoration: underline; text-underline-offset: .25em; }
.nav-panel-footer { display: flex; justify-content: space-between; align-items: center; gap: var(--nav-space-group); padding: var(--nav-space-small) calc(var(--nav-space-panel) + var(--nav-space-small)); border-top: 1px solid var(--color-base-300); font-size: .8rem; line-height: 1.5; }
.nav-panel-footer > a { display: inline-flex; align-items: center; gap: var(--nav-space-small); min-height: 44px; color: var(--color-secondary); text-decoration: none; }
.nav-panel-footer > a:hover { text-decoration: underline; text-underline-offset: .25em; }
.nav-panel-footer > span { color: var(--nav-muted); }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: var(--nav-space-small); padding-left: var(--nav-space-small); }
.top-navigation .nav-actions .btn { min-height: 48px; font-size: .82rem; white-space: nowrap; padding: 10px var(--nav-space-small); line-height: 1.4; gap: 8px; }
.top-navigation .nav-actions .nav-ask { color: var(--color-secondary); background: transparent; border-color: transparent; }
.top-navigation .nav-actions .nav-ask:hover { background: var(--color-base-200); }
.top-navigation .nav-actions .nav-review { background: var(--color-primary); color: var(--color-primary-content); border-color: var(--color-primary); }
.top-navigation :focus-visible { outline: 2px solid var(--color-secondary); outline-offset: 3px; }
.top-navigation ::selection { background: var(--color-secondary); color: var(--color-secondary-content); }
.top-navigation .nav-mobile-toggle { display: none; }
@media(max-width: 1200px) {
  .top-navigation { --nav-inset: 36px; }
  .top-nav-inner { flex-wrap: wrap; justify-content: space-between; gap: 0; min-height: 80px; padding-block: var(--nav-space-small); }
  .nav-brand { font-size: 1rem; }
  .nav-brand img { width: 32px; height: 32px; }
  .top-navigation .nav-mobile-toggle { display: flex; gap: 8px; padding-inline: var(--nav-space-small); min-height: 48px; font-size: .88rem; background: transparent; color: var(--color-base-content); border-color: var(--color-base-300); }
  .nav-mobile-toggle svg { width: 20px; height: 20px; }
  .top-navigation .site-megamenu { width: 100%; flex: none; flex-wrap: wrap; padding-top: var(--nav-space-small); gap: 4px; }
  .nav-ready .site-megamenu:not(.is-expanded) { display: none; }
  .site-megamenu > [popovertarget] { flex: 1; justify-content: center; font-size: .92rem; padding-inline: 8px; }
  .nav-actions { width: 100%; margin: 8px 0 0; padding: 0; gap: var(--nav-space-small); }
  .top-navigation .nav-actions .btn { flex: 1; min-width: 0; min-height: 56px; white-space: normal; font-size: .88rem; }
  .nav-panel-grid, #nav-action .nav-panel-grid { gap: var(--nav-space-group); padding: var(--nav-space-group); grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nav-feature { grid-column: 1 / -1; gap: var(--nav-space-small); }
  .nav-feature-dryas { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: var(--nav-space-group); }
  .nav-feature > span { margin: 0; }
  .nav-panel-footer { padding-inline: calc(var(--nav-space-group) + var(--nav-space-small)); flex-wrap: wrap; gap: 4px var(--nav-space-small); }
}
@media(max-width: 600px) {
  .top-navigation { --nav-inset: 24px; }
  .site-megamenu > [popovertarget] { min-width: 0; flex-basis: 0; font-size: .85rem; gap: 6px; padding-inline: 4px; }
  .nav-brand { font-size: .88rem; gap: 8px; }
  .nav-brand img { width: 28px; height: 28px; }
  .nav-panel-grid, #nav-action .nav-panel-grid { grid-template-columns: minmax(0, 1fr); padding: var(--nav-space-group) var(--nav-space-small); gap: var(--nav-space-group); }
  .nav-column .menu { font-size: 1rem; }
  .nav-column h2 { font-size: .88rem; }
  .nav-column .menu small { font-size: .85rem; }
  .nav-feature { margin-inline: var(--nav-space-small); padding: var(--nav-space-group); }
  .nav-feature-dryas { display: flex; }
  .nav-feature strong { font-size: 1.45rem; }
  .nav-panel-footer { padding-inline: var(--nav-space-group); }
  .top-navigation .nav-actions .btn { font-size: .85rem; gap: 8px; }
  .nav-actions .nav-icon { display: none; }
  .nav-panel-footer > span { display: none; }
}
@media(prefers-reduced-motion: reduce) { .top-navigation * { transition: none !important; } }
@media print { .top-navigation { display: none !important; } }