/* Sticky section navigation. Desktop exposes the home page's primary beats;
   only the narrow layout uses a disclosure. */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--paper) 84%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  transition: border-color 0.2s var(--ease);
}
.nav.is-stuck { border-bottom-color: var(--border); }
.nav__in {
  max-width: var(--maxw);
  height: 66px;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav__links { display: flex; align-items: center; gap: 25px; margin-left: 12px; }
.nav__links a {
  position: relative;
  color: var(--muted);
  font-size: 14px;
  transition: color 0.16s var(--ease);
}
.nav__links a:hover,
.nav__links a[aria-current='location'] { color: var(--ink); }
.nav__links a[aria-current='location']::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 1px;
  background: var(--ink);
}
.nav__right { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.icon-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.icon-btn:hover { color: var(--ink); border-color: var(--border-2); }
.icon-btn svg { width: 16px; height: 16px; }
[data-theme='dark'] .ico--moon,
.ico--sun { display: none; }
[data-theme='dark'] .ico--sun { display: block; }

.nav__menu-toggle,
.nav__mobile-demo { display: none; }
.nav__menu-toggle {
  height: 36px;
  padding: 0 14px;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font: 500 13.5px / 1 var(--font-sans);
  cursor: pointer;
}

@media (max-width: 820px) {
  .nav__in { gap: 18px; }
  .nav__links { gap: 17px; margin-left: 0; }
  .nav__links a { font-size: 13px; }
}

@media (max-width: 980px) {
  .nav__in { gap: 12px; }
  .nav__links {
    position: fixed;
    top: 66px;
    right: var(--gutter);
    left: var(--gutter);
    max-height: calc(100dvh - 82px);
    margin: 0;
    padding: 12px;
    overflow-y: auto;
    display: none;
    align-items: stretch;
    gap: 2px;
    border: 1px solid var(--border);
    border-radius: var(--r-card);
    background: var(--panel);
    box-shadow: var(--shadow-card);
  }
  .nav__links.is-open { display: grid; }
  .nav__links a {
    padding: 13px 12px;
    border-radius: var(--r-chip);
    color: var(--body);
    font-size: 15px;
  }
  .nav__links a:hover { background: var(--sunk); }
  .nav__links a[aria-current='location'] { background: var(--sunk); }
  .nav__links a[aria-current='location']::after { display: none; }
  .nav__menu-toggle { display: inline-flex; align-items: center; }
  .nav__demo { display: none; }
  .nav__mobile-demo {
    display: flex;
    justify-content: center;
    margin-top: 8px;
    background: var(--ink);
    color: var(--paper) !important;
    font-weight: 500;
  }
}

@media (max-width: 440px) {
  .nav__right { gap: 8px; }
}