/* data-msn-scheme="light" pins the light palette on pages that have no dark theme (the welcome shells). */
/* MERIDIAN shared site header (.msn). Single source: scripts/build_site_nav.py (welcome shells) and
   showLogin() in webapp/tenancy.js (sign-in overlay). Every selector here is scoped to .msn* so the
   file can load on any page without restyling it. Static, no motion. */
:root { --msn-h: calc(16px + 72px + 12px); }
.msn {
  --msn-page: #f5f7f5; --msn-surface: #ffffff; --msn-soft: #e9f1ee;
  --msn-ink: #173d45; --msn-ink2: #52696f; --msn-teal: #146b60;
  --msn-border: #c8d7d2; --msn-focus: #9a4b00; --msn-shadow: 0 6px 22px rgba(23, 61, 69, .12);
  position: sticky; top: 0; z-index: 60;
  padding: 16px 24px 12px; box-sizing: border-box;
  pointer-events: none; color: var(--msn-ink);
  font: 500 17px/1.3 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  .msn:not([data-msn-scheme="light"]) {
    --msn-page: #102126; --msn-surface: #172e34; --msn-soft: #1c3b40;
    --msn-ink: #e3efec; --msn-ink2: #aec4c4; --msn-teal: #81d6bf;
    --msn-border: #436067; --msn-focus: #ffcc83; --msn-shadow: 0 6px 22px rgba(0, 0, 0, .4);
  }
}
.msn *, .msn *::before, .msn *::after { box-sizing: border-box; }
.msn-bar {
  pointer-events: auto; position: relative;
  display: flex; align-items: center; gap: 8px;
  max-width: 1280px; min-height: 72px; margin: 0 auto; padding: 0 14px 0 18px;
  background: var(--msn-surface); border: 1px solid var(--msn-border);
  border-radius: 22px; box-shadow: var(--msn-shadow);
}
.msn a, .msn summary { color: var(--msn-ink); text-decoration: none; }
.msn a:focus-visible, .msn summary:focus-visible { outline: 3px solid var(--msn-focus); outline-offset: 2px; }
.msn-brand {
  display: inline-flex; align-items: center; gap: 10px; min-height: 44px; margin-right: auto;
  font-weight: 700; letter-spacing: .2em; font-size: .95em; white-space: nowrap; border-radius: 12px;
}
.msn-brand img { width: 28px; height: 28px; flex: none; }
.msn-links { display: flex; align-items: center; gap: 4px; margin: 0; padding: 0; list-style: none; }
.msn-link {
  display: inline-flex; align-items: center; min-height: 44px; min-width: 44px; padding: 0 16px;
  border-radius: 14px; font-weight: 600; border-bottom: 3px solid transparent;
}
.msn-link:hover { background: var(--msn-soft); }
.msn-link[aria-current="page"] { background: var(--msn-soft); border-bottom-color: var(--msn-teal); color: var(--msn-teal); font-weight: 700; }
.msn-action {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 20px; margin-left: 12px;
  border: 1px solid var(--msn-teal); border-radius: 14px; font-weight: 700; color: var(--msn-teal); white-space: nowrap;
}
.msn-action:hover { background: var(--msn-soft); }
.msn-menu { display: none; position: relative; }
.msn-menu > summary {
  display: inline-flex; align-items: center; min-height: 44px; min-width: 44px; padding: 0 16px;
  border: 1px solid var(--msn-border); border-radius: 14px; font-weight: 700; cursor: pointer; list-style: none;
}
.msn-menu > summary::-webkit-details-marker { display: none; }
.msn-menu[open] > summary { background: var(--msn-soft); }
.msn-menu-panel {
  position: absolute; right: 0; top: calc(100% + 12px); min-width: 220px;
  max-block-size: calc(100dvh - 120px); overflow: auto; padding: 8px;
  background: var(--msn-surface); border: 1px solid var(--msn-border); border-radius: 18px; box-shadow: var(--msn-shadow);
}
.msn-menu-panel .msn-links { flex-direction: column; align-items: stretch; gap: 2px; }
.msn-menu-panel .msn-link { width: 100%; }

@media (min-width: 1800px) {
  .msn { font-size: 19px; padding-left: 32px; padding-right: 32px; }
  .msn-bar { max-width: 1560px; }
}
@media (min-width: 3200px) { .msn-bar { max-width: 3000px; } }

@media (max-width: 720px) {
  :root { --msn-h: calc(max(8px, env(safe-area-inset-top)) + 64px + 8px); }
  .msn { padding: max(8px, env(safe-area-inset-top)) 12px 8px; font-size: 16px; }
  .msn-bar { min-height: 64px; border-radius: 18px; padding: 0 10px 0 14px; }
  .msn-bar > .msn-nav { display: none; }
  .msn-menu { display: block; }
  .msn-action { margin-left: 0; padding: 0 10px; font-size: 15px; }
  .msn-brand { min-width: 0; letter-spacing: .1em; gap: 8px; font-size: .85em; }
  .msn-brand img { width: 24px; height: 24px; }
  .msn-bar { gap: 6px; padding: 0 8px 0 12px; }
  .msn-menu > summary { padding: 0 12px; }
}
@media (max-width: 720px) and (max-height: 480px) {
  .msn-bar { min-height: 56px; }
}
@media print { .msn { display: none !important; } }

/* ── the pre-sign-in lockup (scripts/build_site_nav.py anon_header; the anonymous Home) ───────────
   Full-width bar in the New preview interface's own tokens (webapp/theme-helm.css), referenced by
   name and never copied. Needs html[data-interface="preview"], which the Home sets. No page links
   exist in this variant, so nothing below styles them. */
:root[data-interface="preview"] .msn.msn--home {
  --msn-surface: var(--pan); --msn-soft: var(--bg2); --msn-ink: var(--ink); --msn-ink2: var(--dim);
  --msn-teal: var(--brand); --msn-border: var(--edge); --msn-focus: var(--brand); --msn-shadow: none;
  position: relative; padding: 0; pointer-events: auto;
  background: var(--pan); border-bottom: 1px solid var(--edge); font: 500 16px/1.3 var(--disp);
}
:root[data-interface="preview"] .msn--home .msn-bar {
  max-width: none; min-height: 84px; padding: 10px 40px; gap: 14px;
  background: transparent; border: 0; border-radius: 0; box-shadow: none;
}
:root[data-interface="preview"] .msn--home .msn-brand { gap: 14px; letter-spacing: 0; font-size: inherit; font-weight: 500; }
:root[data-interface="preview"] .msn--home .msn-mark {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  width: 44px; height: 44px; border-radius: 10px; background: var(--pan2); color: var(--brand);
}
:root[data-interface="preview"] .msn--home .msn-lock { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
:root[data-interface="preview"] .msn--home .msn-word { font: 500 25px/1.1 var(--serif-disp); letter-spacing: 2px; color: var(--ink); }
:root[data-interface="preview"] .msn--home .msn-tag { font: 500 11px/1.2 var(--disp); letter-spacing: 1px; color: var(--dim); }
:root[data-interface="preview"] .msn--home .msn-theme { margin-left: 0; border-radius: 999px; font: 600 15px/1 var(--disp); padding: 0 18px; }
@media (max-width: 1023px) {
  :root[data-interface="preview"] .msn--home .msn-tag { display: none; }
}
@media (max-width: 720px) {
  :root[data-interface="preview"] .msn--home .msn-bar { min-height: 68px; padding: 10px 16px; }
  :root[data-interface="preview"] .msn--home .msn-word { font-size: 22px; letter-spacing: 1.5px; }
  :root[data-interface="preview"] .msn--home .msn-theme { padding: 0; }
}