/* One navigation shell for home, About, IQB and Current. */
:root {
  --most-header-height: 88px;
  --most-header-gutter: var(--page-gutter, clamp(24px, 2.5vw, 64px));
  --most-header-paper: #ffffff;
  --most-header-ink: #0a0a0a;
  --header-height: var(--most-header-height);
}
html { scroll-padding-top: var(--header-offset, var(--most-header-height)); }
/* Shared keyboard entry, including Current which has no styles.css import. */
body.most6-page .skip-link {
  position: fixed;
  z-index: 200;
  top: 0;
  left: 0;
  background: var(--signal, #ff5f43);
  color: #0a0a0a;
  padding: 1rem;
  transform: translateY(-120%);
}
body.most6-page .skip-link:focus { transform: translateY(0); }
body[data-header-context="paper"] { padding-top: var(--header-offset, var(--most-header-height)); }
body[data-header-context].menu-open { overflow: hidden; }
body[data-header-context] .site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 28px;
  width: 100%;
  height: auto;
  min-height: var(--most-header-height);
  margin: 0;
  padding: 10px var(--most-header-gutter);
  border: 0;
  background: var(--most-header-paper);
  color: var(--most-header-ink);
  font-family: var(--most-font, "Inter", "Noto Sans JP");
  line-height: 1.4;
  box-sizing: border-box;
  transition: background-color .2s ease, color .2s ease;
}
body[data-header-context] .site-header > * {
  display: flex;
  align-items: center;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
  color: inherit;
  box-sizing: border-box;
}
body[data-header-context] .site-header a { color: inherit; text-decoration: none; }
body[data-header-context] .site-header .header-mark {
  flex: none;
  min-width: 0;
  padding: 0;
  white-space: nowrap;
}
body[data-header-context] .site-header .header-field { display: none; }
body[data-header-context] .site-header .desktop-nav {
  flex: 1;
  flex-wrap: wrap;
  justify-content: flex-end;
  order: 0;
  gap: 24px;
  margin-left: auto;
}
body[data-header-context] .site-header .desktop-nav a { white-space: nowrap; }
body[data-header-context] .site-header .desktop-nav a:hover,
body[data-header-context] .site-header .desktop-nav a[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-thickness: 1px;
}
body[data-header-context] .site-header .language-switch {
  flex: none;
  gap: 4px;
  padding: 0;
  margin: 0;
}
body[data-header-context] .site-header .language-switch .language-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  margin: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
}
body[data-header-context] .site-header .language-switch .language-link[aria-current="page"],
body[data-header-context] .site-header .language-switch .language-link[aria-pressed="true"],
body[data-header-context] .site-header .language-switch .language-link:hover {
  background: transparent;
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-thickness: 1px;
}
body[data-header-context] .site-header .header-meta {
  display: flex;
  flex: none;
  flex-wrap: nowrap;
  justify-content: flex-start;
  gap: 16px;
  white-space: nowrap;
}
body[data-header-context] .site-header .menu-toggle { display: none; }
body[data-header-context] .site-header :focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
}
body[data-header-context].menu-open .site-header {
  background: #0a0a0a;
  color: #ffffff;
}
body[data-header-context] .site-header :focus:not(:focus-visible),
body[data-header-context] .mobile-menu :focus:not(:focus-visible) {
  outline: none;
}
/* Light/dark refer to the foreground, independently of the headline accent. */
body[data-header-context="home"]:not(.opening-past):not([data-header-past="true"]):not([data-header-scrolled="true"]):not(.menu-open) .site-header,
body[data-header-context="iqb"]:not([data-header-past="true"]):not([data-header-scrolled="true"]):not(.menu-open) .site-header {
  background: transparent;
  color: #fff;
}
body[data-header-context="home"][data-opening-tone="dark"]:not([data-header-tone]):not(.opening-past):not([data-header-past="true"]):not([data-header-scrolled="true"]):not(.menu-open) .site-header,
body[data-header-context="home"][data-header-tone="dark"]:not(.opening-past):not([data-header-past="true"]):not([data-header-scrolled="true"]):not(.menu-open) .site-header {
  color: var(--most-header-ink);
}
/* Once the photograph moves under the fixed navigation, give links a stable field. */
body[data-header-context][data-header-scrolled="true"]:not(.menu-open) .site-header {
  background: var(--most-header-paper);
  color: var(--most-header-ink);
}
body[data-header-context] .mobile-menu {
  position: fixed;
  inset: var(--header-offset, var(--most-header-height)) 0 0;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin: 0;
  padding: 24px var(--most-header-gutter) max(24px, env(safe-area-inset-bottom));
  overflow: auto;
  overscroll-behavior: contain;
  background: #0a0a0a;
  color: #ffffff;
  font-family: var(--most-font, "Inter", "Noto Sans JP");
  box-sizing: border-box;
}
body[data-header-context] .mobile-menu[hidden] { display: none !important; }
body[data-header-context] .mobile-menu nav { display: grid; gap: 8px; }
body[data-header-context] .mobile-menu a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: .35rem 0;
  border: 0;
  color: inherit;
  text-decoration: none;
}
body[data-header-context] .mobile-menu a:hover { color: #a6a6a6; }
body[data-header-context] .mobile-menu > p { margin: auto 0 0; padding-top: 2rem; color: #a6a6a6; }
body[data-header-context] .mobile-menu :focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }
@media (max-width: 1100px) {
  body[data-header-context] .site-header { gap: 20px; }
  body[data-header-context] .site-header .header-meta { display: none; }
  body[data-header-context] .site-header .desktop-nav { gap: 18px; }
}
@media (max-width: 900px) {
  :root { --most-header-height: 72px; --most-header-gutter: 20px; }
  body[data-header-context] .site-header { gap: 12px; padding-block: 10px; }
  body[data-header-context] .site-header .header-mark { margin-right: auto; }
  body[data-header-context] .site-header .desktop-nav { display: none; }
  body[data-header-context] .site-header .language-switch .language-link { min-width: 44px; }
  body[data-header-context] .site-header .menu-toggle:not([hidden]) {
    display: flex;
    flex: none;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    min-width: 60px;
    min-height: 44px;
    padding: 0;
    border: 0;
    background: transparent;
    color: inherit;
    font-family: inherit;
    cursor: pointer;
  }
  body[data-header-context] .site-header .menu-icon { line-height: 1; }
}
@media (max-width: 900px) {
  body[data-header-context="home"][data-opening-tone="dark"]:not([data-header-tone]):not(.opening-past):not([data-header-past="true"]):not([data-header-scrolled="true"]):not(.menu-open) .site-header { color:#fff; }
}
@media (prefers-reduced-motion: reduce) {
  body[data-header-context] .site-header { transition: none; }
}
html[data-motion-preference="reduce"] body[data-header-context] .site-header { transition: none; }

body[data-header-context] .site-header .header-mark{display:inline-flex;align-items:center;min-height:2.75rem}

/* r22: primary navigation retains UI text metrics with a 44px tap area,
   including tablet widths that expose the desktop navigation. */
.most6-page .site-header .desktop-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  min-width: 2.75rem;
}