/* menu-v2 (proposal 2026-11-06): mobile menu as frosted glass with a staged reveal,
   plus an always-visible EN switch in the mobile header. Loaded after components.css. */

.site-page .header-lang { display: none; }

@media (max-width: 760px) {
  /* --- EN switch in the header (first screen) --- */
  .site-page .header-lang {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: none;
    height: 28px;
    padding: 0 9px;
    margin-left: auto;
    border: 1px solid rgba(247, 245, 242, .36);
    border-radius: 999px;
    color: var(--text);
    font: 500 11px/1 "Helvetica Neue", Arial, sans-serif;
    letter-spacing: .14em;
    text-indent: .14em;
    text-decoration: none;
    background: rgba(7, 24, 43, .16);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    transition: background .25s, border-color .25s;
  }
  .site-page .header-lang:active { background: rgba(247, 245, 242, .14); }
  .site-page .site-header { gap: 12px; }
  .site-page .site-header .header-cta { flex: none; white-space: nowrap; margin-left: 2px; }

  /* --- Menu panel: full screen glass under the header --- */
  .site-page .mobile-menu:not([hidden]) {
    position: fixed;
    inset: 0;
    top: 0;
    height: 100dvh;
    max-height: none;
    padding: calc(var(--header) + 10px) var(--gutter) calc(36px + env(safe-area-inset-bottom, 0px));
    gap: 0;
    background: linear-gradient(180deg, rgba(5, 17, 33, .50) 0%, rgba(5, 17, 33, .66) 55%, rgba(5, 17, 33, .78) 100%);
    -webkit-backdrop-filter: blur(26px) saturate(150%);
    backdrop-filter: blur(26px) saturate(150%);
    opacity: 0;
    transition: opacity .38s cubic-bezier(.22, .61, .24, 1);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .site-page .mobile-menu.is-open { opacity: 1; }
  .site-page .mobile-menu.is-closing { transition-duration: .24s; }

  /* --- Rows: name left, arrow right, hairline drawn from the left --- */
  .site-page .mobile-menu a {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 19px 0;
    font-size: 28px;
    font-weight: 300;
    letter-spacing: -.02em;
    line-height: 1.2;
    opacity: 0;
    transform: translate3d(0, 14px, 0);
    transition: opacity .5s cubic-bezier(.22, .61, .24, 1), transform .62s cubic-bezier(.22, .61, .24, 1);
  }
  .site-page .mobile-menu a::after {
    content: "↗";
    font-size: 16px;
    opacity: .55;
  }
  .site-page .mobile-menu a::before {
    content: "";
    position: absolute;
    inset: auto 0 0 0;
    height: 1px;
    background: rgba(247, 245, 242, .16);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform .7s cubic-bezier(.22, .61, .24, 1);
  }
  .site-page .mobile-menu.is-open a { opacity: 1; transform: none; }
  .site-page .mobile-menu.is-open a::before { transform: scaleX(1); }

  /* Second group: Works and contact, quieter */
  .site-page .mobile-menu a[data-group-start] { margin-top: 30px; }
  .site-page .mobile-menu a[data-group-start],
  .site-page .mobile-menu a[data-group-start] ~ a {
    font-size: 17px;
    padding: 16px 0;
    letter-spacing: 0;
  }
  .site-page .mobile-menu a.mobile-contact { color: var(--mint, #84d6bd); }
  .site-page .mobile-menu a.mobile-contact::after { content: ""; }

  /* Staggered arrival (opening only) */
  .site-page .mobile-menu.is-open a:nth-child(1) { transition-delay: .06s; }
  .site-page .mobile-menu.is-open a:nth-child(2) { transition-delay: .10s; }
  .site-page .mobile-menu.is-open a:nth-child(3) { transition-delay: .14s; }
  .site-page .mobile-menu.is-open a:nth-child(4) { transition-delay: .18s; }
  .site-page .mobile-menu.is-open a:nth-child(5) { transition-delay: .24s; }
  .site-page .mobile-menu.is-open a:nth-child(6) { transition-delay: .28s; }
  .site-page .mobile-menu.is-open a:nth-child(1)::before { transition-delay: .12s; }
  .site-page .mobile-menu.is-open a:nth-child(2)::before { transition-delay: .16s; }
  .site-page .mobile-menu.is-open a:nth-child(3)::before { transition-delay: .20s; }
  .site-page .mobile-menu.is-open a:nth-child(4)::before { transition-delay: .24s; }
  .site-page .mobile-menu.is-open a:nth-child(5)::before { transition-delay: .30s; }
  .site-page .mobile-menu.is-open a:nth-child(6)::before { transition-delay: .34s; }
  .site-page .mobile-menu.is-closing a { transition-duration: .18s; transition-delay: 0s; }

  /* Page behind stays still while the menu is open */
  html.menu-open, html.menu-open body { overflow: hidden; }
}

/* Small phones: keep 「お問い合わせ」 on one line by dropping its arrow */
@media (max-width: 400px) {
  .site-page .site-header .header-cta > span { display: none; }
}

@media (max-width: 760px) and (prefers-reduced-motion: reduce) {
  .site-page .mobile-menu:not([hidden]) { transition-duration: .15s; }
  .site-page .mobile-menu a,
  .site-page .mobile-menu a::before { transform: none !important; transition-delay: 0s !important; }
}