/* ============================================================
   アクセシビリティ共通補助
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.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 10000;
  max-width: calc(100vw - 20px);
  padding: 12px 18px;
  border: 2px solid #ffffff;
  border-radius: 10px;
  color: #ffffff;
  background: #0b3143;
  box-shadow: 0 8px 24px rgba(11, 49, 67, 0.28);
  font-weight: 900;
  line-height: 1.4;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 0.16s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 3px solid #00a7db;
  outline-offset: 3px;
}

:where(input, select, textarea):focus-visible {
  border-color: #007fae;
  box-shadow: 0 0 0 4px rgba(0, 167, 219, 0.16);
}

#main-content {
  scroll-margin-top: 110px;
}

@media (prefers-reduced-motion: reduce) {
  .skip-link {
    transition: none;
  }

  html:focus-within {
    scroll-behavior: auto;
  }
}