/* Shared geometry for every entry point; page content widths never move the navigation. */
html { scrollbar-gutter: stable; scroll-padding-top: 88px; }
.site-navigation-slot { height: 76px; min-height: 76px; width: 100%; position: relative; z-index: 100; }
.site-navigation-slot nav.site-navigation {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  height: 76px;
  min-height: 76px;
  margin: 0 auto;
  padding: 0;
  gap: 12px;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
  isolation: isolate;
}
.site-navigation::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0 calc((1180px - 100vw) / 2);
  min-width: 100%;
  background: var(--navigation-surface, var(--paper, rgba(244, 245, 247, .86)));
  backdrop-filter: blur(16px);
  pointer-events: none;
}
[data-theme="dark"] .site-navigation::before { background: var(--navigation-surface, var(--paper, rgba(8, 12, 18, .86))); }
.site-navigation-slot .site-navigation .brand { display: flex; align-items: center; gap: 12px; font-size: 16.8px; font-weight: 800; letter-spacing: -.168px; white-space: nowrap; text-decoration: none; color: inherit; }
.site-navigation-slot .site-navigation .brand__mark { display: block; width: 44px; height: 44px; border: 1px solid rgba(128,128,128,.3); border-radius: 50%; overflow: hidden; padding: 0; flex-shrink: 0; box-shadow: none; }
.site-navigation-slot .site-navigation .brand__mark img { display: block; width: 100%; height: 100%; object-fit: cover; }
.site-navigation-slot .site-navigation .topbar__links { display: flex; align-items: center; gap: 4px; font-size: 14.72px; font-weight: 700; color: inherit; }
.site-navigation-slot .site-navigation .topbar__links a { display: inline-flex; align-items: center; justify-content: center; height: 38px; min-height: 38px; padding: 8px 14px; border: 0; border-radius: 999px; font-size: inherit; color: inherit; text-decoration: none; white-space: nowrap; }
.site-navigation-slot .site-navigation .topbar__links a:hover,
.site-navigation-slot .site-navigation .topbar__links a.is-active { color: inherit; background: rgba(128,128,128,.16); }
.site-navigation-slot .site-navigation .theme-toggle { display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; width: 36px; height: 36px; margin: 0 0 0 4px; padding: 0; border: 0; border-radius: 50%; background: transparent; font: inherit; cursor: pointer; }
.site-navigation-slot .site-navigation .theme-toggle__icon { font-size: 20px; line-height: 1; }
.site-navigation a:focus-visible, .site-navigation button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
@media (max-width: 1220px) { .site-navigation::before { inset-inline: -20px; } }
@media (max-width: 760px) {
  html { scroll-padding-top: 80px; }
  .site-navigation-slot { height: 68px; min-height: 68px; }
  .site-navigation-slot nav.site-navigation { width: calc(100% - 28px); height: 68px; min-height: 68px; gap: 8px; }
  .site-navigation::before { inset-inline: -14px; }
  .site-navigation-slot .site-navigation .topbar__links { gap: 0; font-size: 13.12px; }
  .site-navigation-slot .site-navigation .topbar__links a { padding-inline: 8px; }
}
@media (max-width: 520px) { .site-navigation-slot .site-navigation .brand > span:last-child { display: none; } }
@media (max-width: 460px) {
  .site-navigation-slot .site-navigation .topbar__links { font-size: 12.16px; }
  .site-navigation-slot .site-navigation .topbar__links a { padding-inline: 6px; }
}

/* The App section opens with its story; feature details remain a secondary destination. */
.app-section-navigation { display: flex; align-items: center; gap: 28px; border-bottom: 1px solid var(--line); font-size: 13px; line-height: 1.6; }
.app-section-navigation a { display: inline-flex; align-items: center; gap: 7px; padding: 0 0 13px; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; text-decoration: none; }
.app-section-navigation a:hover { color: var(--accent); }
.app-section-navigation a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); font-weight: 650; }
.app-section-navigation--showcase { width: min(1120px, calc(100% - 64px)); margin: 36px auto 0; }
@media (max-width: 620px) { .app-section-navigation--showcase { width: calc(100% - 36px); margin-top: 24px; } }
@media print { .app-section-navigation { display: none !important; } }

/* Let the map continue underneath the header instead of stopping at a solid strip. */
.hero:not(.hero--atlas):not(.hero--stats-full) .site-navigation::before {
  background: linear-gradient(to bottom, rgba(8,12,18,.92), rgba(8,12,18,.65) 72%, rgba(8,12,18,0));
  bottom: -22px;
  backdrop-filter: none;
}
[data-theme="light"] .hero:not(.hero--atlas):not(.hero--stats-full) .site-navigation::before {
  background: linear-gradient(to bottom, rgba(246,248,250,.96), rgba(246,248,250,.74) 72%, rgba(246,248,250,0));
}
.hero--atlas { --navigation-surface: var(--atlas-bg); }