*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  /* ヘッダーの下に、飛び先の見出しが潜り込まないようにする */
  scroll-padding-top: calc(var(--header-height) + 24px);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--color-ink);
  font-family: var(--font-ja);
  font-weight: 400;
  font-size: 16px;
  line-height: 2;
  letter-spacing: 0.06em;
  overflow-x: hidden;
}

h1, h2, h3, p, figure, dl, dd {
  margin: 0;
  padding: 0;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-glow);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  padding: 12px 20px;
  background: var(--color-ink);
  color: var(--color-abyss);
  transform: translateY(-100%);
}

.skip-link:focus {
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}