/* ナビはbackdrop-filterのあるヘッダーの外に置き、画面全体を基準に開く。 */
.mobile-menu-toggle { display: none; }

@media (max-width: 1119px) {
  #header { height: 76px; }
  .h_inner { align-items: center; gap: .5rem; padding: .75rem var(--hGutter); }
  .h_logo { margin-top: 0; }
  .h_logo .logo_ja { font-size: 1.5rem; }
  .h_logo .logo_en { font-size: .62rem; }
  .h_inner > .ruler, .hand { display: none; }
  .h_logo { flex-shrink: 0; }
  .h_items { margin-left: auto; }
  .h_items .btn { white-space: nowrap; }

  .mobile-menu-toggle {
    display: flex;
    order: 1;
    flex: 0 0 48px;
    width: 48px;
    height: 48px;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    padding: 10px;
    appearance: none;
    border: 0;
    border-radius: 0;
    background: none;
    color: inherit;
    cursor: pointer;
  }
  .mobile-menu-toggle span { display: block; width: 100%; height: 2px; background: currentColor; transition: transform .35s ease-out, opacity .35s ease-out; }
  .mobile-menu-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(8px) rotate(35deg) scaleX(1.1);
  }
  .mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .mobile-menu-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-8px) rotate(-35deg) scaleX(1.1);
  }

  .h_nav[hidden] { display: none; }
  .h_nav:not([hidden]) {
    inset: 0;
    z-index: 99;
    flex-direction: column;
    gap: .5rem;
    overflow-y: auto;
    padding: calc(76px + var(--gap)) var(--hGutter) var(--gap);
    background: var(--bc);
    color: var(--tx);
    mix-blend-mode: normal;
    opacity: 0;
    transform: translateY(-.5rem);
    transition: opacity .35s ease-out, transform .35s ease-out;
    pointer-events: none;
    overscroll-behavior: contain;
  }
  .h_nav.is-menu-open {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }
  .h_nav:not([hidden]) a,
  .h_nav:not([hidden]) a:first-child {
    flex: 0 0 auto;
    flex-direction: row;
    align-items: baseline;
    justify-content: flex-start;
    gap: 1rem;
    width: 100%;
    min-height: 44px;
    margin: 0;
    padding: .75rem 0;
    font-size: 1.25rem;
  }
  .h_nav:not([hidden]) a {
    position: relative;
    --menu-index: 0;
  }
  .h_nav:not([hidden]) a::after {
    position: absolute;
    right: 0;
    bottom: .5rem;
    left: 0;
    height: 1px;
    background: var(--metal-edge);
    content: "";
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .6s linear;
    transition-delay: 0ms;
  }
  .h_nav.is-menu-open a::after {
    transform: scaleX(1);
    transition-delay: calc(var(--menu-index, 0) * 80ms);
  }
  .h_nav:not([hidden]) .num,
  .h_nav:not([hidden]) .label {
    clip-path: inset(0 0 100% 0);
    transform: translateY(-.75em);
    transition: clip-path .5s ease-out, transform .5s ease-out;
    transition-delay: 0ms;
  }
  .h_nav.is-menu-open .num,
  .h_nav.is-menu-open .label {
    clip-path: inset(0);
    transform: none;
    transition-delay: calc(100ms + var(--menu-index, 0) * 80ms);
  }
  .h_nav .num { font-size: .875rem; }

  @media (prefers-reduced-motion: reduce) {
    .mobile-menu-toggle span,
    .h_nav:not([hidden]),
    .h_nav:not([hidden]) a::after,
    .h_nav:not([hidden]) .num,
    .h_nav:not([hidden]) .label {
      transition: none;
      transition-delay: 0ms;
    }
  }
}

/* スマホ幅でもロゴ・予約ボタン・メニューボタンを1行に収める */
@media (max-width: 400px) {
  .h_items .btn { gap: .375rem; padding: .5rem .75rem; font-size: .75rem; }
  .h_items .btn svg { width: 14px; height: 14px; }
}
@media (max-width: 359px) {
  .h_items .btn svg { display: none; }
}