/* Shared responsive navigation for every public page. */
html { scroll-padding-top: 86px; }

body nav .wrap {
  width: 100%;
  max-width: none;
  min-height: 66px;
  height: auto;
  padding: 8px clamp(20px, 3.5vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

body nav .brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 46px;
  padding: 8px 14px;
  border-radius: 14px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

body nav .brand img { flex: 0 0 auto; width: 30px; height: 30px; }
body nav .nav-actions,
body nav .nav-primary-links { display: flex; align-items: center; }
body nav .nav-actions { min-width: 0; margin-left: auto; }
body nav .nav-primary-links { min-width: 0; gap: clamp(10px, 1.35vw, 20px); }

body nav .nav-actions .link {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
}

body nav .nav-actions .link:hover,
body nav .nav-actions .link:focus-visible { color: var(--text); }
body nav .page-menu,
body nav .lang-toggle { flex: 0 0 auto; }
body nav .page-menu__panel { right: 0; left: auto; }
body nav .lang-toggle { min-height: 34px; line-height: 1; }
body nav .lang-toggle button { min-height: 34px; }

/* Navigation language copies must never be visible at the same time. */
html:not([lang="en"]) body nav [data-en],
html[lang="en"] body nav [data-jp] {
  display: none !important;
}

@media (max-width: 900px) {
  html { scroll-padding-top: 150px; }

  body nav .wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px 14px;
    padding: 10px 18px 12px;
  }

  body nav .brand {
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
  }

  body nav .nav-actions {
    grid-column: 1 / -1;
    grid-row: 2;
    display: flex;
    width: 100%;
    min-width: 0;
    margin: 0;
  }

  body nav .nav-primary-links {
    width: 100%;
    min-width: 0;
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: clamp(4px, .9vw, 8px);
  }

  body nav .nav-primary-links > .page-menu {
    margin-left: auto;
  }

  body nav .nav-actions .link {
    display: inline-flex;
    flex: 0 1 auto;
    min-width: 0;
    min-height: 36px;
    padding: 0 clamp(7px, 1.2vw, 12px);
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, .56);
    font-size: clamp(10.5px, 1.55vw, 12.5px);
    line-height: 1;
    justify-content: center;
    text-align: center;
  }

  /* home.css displays English language anchors as blocks with !important.
     Keep direct navigation anchors as flex buttons so their labels stay centered. */
  html[lang="en"] body nav .nav-primary-links > a.link[data-en] {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  body nav .nav-actions .link:hover,
  body nav .nav-actions .link:focus-visible { background: var(--surface); }
  body nav .page-menu {
    flex: 0 1 auto;
    min-width: 0;
    min-height: 36px;
    max-width: 100%;
  }

  body nav .page-menu__primary,
  body nav .page-menu__button {
    min-height: 34px;
    display: inline-flex;
    align-items: center;
  }

  body nav .page-menu__primary {
    min-width: 0;
    max-width: none;
    overflow: visible;
    text-overflow: clip;
  }

  body nav .page-menu__panel {
    right: 0;
    left: auto;
    width: max-content;
    min-width: 190px;
    max-width: min(280px, calc(100vw - 32px));
  }

  body nav .page-menu__panel a { white-space: normal; line-height: 1.35; }

  body nav .lang-toggle {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    margin: 0;
    font-size: 12px;
  }

  body nav .lang-toggle button { min-height: 38px; padding: 6px 11px; }
}

@media (max-width: 480px) {
  html { scroll-padding-top: 180px; }
  body nav .wrap { gap: 9px 10px; padding: 9px 12px 11px; }

  body nav .brand {
    min-width: 0;
    min-height: 42px;
    padding: 7px 10px;
    border-radius: 12px;
    font-size: clamp(14px, 4.2vw, 16px);
  }

  body nav .brand img { width: 27px; height: 27px; }
  body nav .nav-primary-links { gap: clamp(3px, 1.8vw, 7px); }

  body nav .nav-actions .link {
    min-height: 34px;
    padding: 0 clamp(5px, 1.8vw, 9px);
    font-size: clamp(9.5px, 2.75vw, 11.5px);
  }

  body nav .page-menu { min-height: 34px; }

  body nav .page-menu__primary,
  body nav .page-menu__button {
    min-height: 32px;
    font-size: clamp(9.5px, 2.75vw, 12px);
  }

  body nav .page-menu__primary {
    padding-left: clamp(6px, 2vw, 10px);
    padding-right: clamp(4px, 1.2vw, 8px);
  }

  body nav .page-menu__button {
    padding-left: clamp(4px, 1.2vw, 7px);
    padding-right: clamp(5px, 1.8vw, 8px);
  }
  body nav .lang-toggle button { min-height: 36px; padding: 5px 8px; }
}

@media (max-width: 350px) {
  body nav .brand { font-size: 13px; }
  body nav .brand img { width: 25px; height: 25px; }
  body nav .lang-toggle button { padding-inline: 6px; }
}