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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text-body);
  background-color: var(--color-surface-main);
  background-image: var(--paper-noise, var(--texture-washi));
  background-repeat: repeat;
  background-size: 180px 180px;
  line-height: 1.75;
  font-size: 1rem;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-link-hover);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-focus-on-light);
  outline-offset: 2px;
}

.site-footer a:focus-visible,
.btn-primary:focus-visible {
  outline-color: var(--color-focus-on-dark);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  color: var(--color-text-heading);
  line-height: 1.45;
  font-weight: 700;
  margin: 0 0 0.85rem;
  letter-spacing: 0.04em;
}

h1 {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  font-weight: 700;
  letter-spacing: 0.05em;
}

h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  letter-spacing: 0.06em;
}

h3 {
  font-size: 1.125rem;
  letter-spacing: 0.03em;
}

p {
  margin: 0 0 1rem;
}

ul,
ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--color-brand-navy);
  color: var(--color-dark-text);
  padding: 0.5rem 1rem;
  z-index: 100;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.provisional {
  /* 制作側起草の暫定文マーカー用クラス（見た目は通常） */
}

/* フォーム要素の基本（コントラスト維持） */
input,
select,
textarea {
  font: inherit;
  color: var(--color-text-body);
  background: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.65rem 0.85rem;
}

input:disabled,
select:disabled,
textarea:disabled,
button:disabled {
  color: var(--color-disabled-text);
  background: var(--color-disabled-bg);
  cursor: not-allowed;
}