:root {
  --font-sans: "Helvetica Neue", Arial, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif;
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #555555;
  --color-text-tertiary: #767676;
  --color-border-tertiary: #e6e4e0;
  --color-accent: #598a87;
  --color-accent-strong: #44706d;
  --border-radius-lg: 12px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: #fff; }
a { color: inherit; }
.page { font-family: var(--font-sans); background: #ffffff; color: var(--color-text-primary); }

/* トップページ */
.hero { text-align: center; padding: 96px 48px 88px; }
.hero-logo { width: 240px; height: 240px; margin: 0 auto 20px; display: block; }
.hero-name { font-size: 52px; font-weight: 600; letter-spacing: 0.14em; line-height: 1.2; margin-bottom: 64px; }
.hero-meaning { font-size: 18px; color: var(--color-text-secondary); line-height: 1.9; letter-spacing: 0.01em; }
.hero-meaning::after { content: ""; display: block; width: 32px; height: 2px; background: var(--color-accent); margin: 36px auto; }
.hero-mission { font-size: 34px; font-weight: 600; color: var(--color-text-primary); letter-spacing: 0.02em; line-height: 1.3; }
.divider { border: none; border-top: 1px solid var(--color-border-tertiary); margin: 0 48px; }
.section { padding: 64px 48px; }
.section-label { font-weight: 500; letter-spacing: 0.1em; margin-bottom: 24px; }
.section h2 { font-size: 22px; font-weight: 500; margin-bottom: 16px; }
.section p { font-size: 15px; color: var(--color-text-secondary); line-height: 1.8; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 32px; }
.card { background: #f9f8f6; border-radius: var(--border-radius-lg); padding: 24px; }
.card h3 { font-size: 15px; font-weight: 500; margin-bottom: 8px; }
.card p { font-size: 13px; color: var(--color-text-secondary); line-height: 1.7; }
.contact-link { display: inline-block; margin-top: 16px; font-size: 16px; color: var(--color-accent-strong); text-decoration: none; text-underline-offset: 4px; }
.contact-link:hover { text-decoration: underline; }

/* 下層ページ（プライバシーポリシー・404） */
.subpage-header { padding: 24px 48px; }
.subpage-home { display: inline-flex; align-items: center; gap: 8px; font-size: 16px; font-weight: 600; letter-spacing: 0.08em; text-decoration: none; }
.document { max-width: 760px; padding: 48px 48px 80px; }
.document h1 { font-size: 28px; font-weight: 500; margin-bottom: 24px; }
.document h2 { font-size: 17px; font-weight: 500; margin: 40px 0 12px; }
.document p, .document li { font-size: 15px; color: var(--color-text-secondary); line-height: 1.8; }
.document ul { padding-left: 1.4em; margin-top: 8px; }
.document a { color: var(--color-accent-strong); text-decoration: none; text-underline-offset: 3px; overflow-wrap: anywhere; }
.document a:hover { text-decoration: underline; }
.document p + p, .document p + ul, .document ul + p { margin-top: 12px; }
.document .document-date { margin-top: 48px; }
.notfound { text-align: center; padding: 96px 48px 120px; }
.notfound-code { font-size: 64px; font-weight: 600; letter-spacing: 0.1em; margin-bottom: 16px; }
.notfound p { font-size: 15px; color: var(--color-text-secondary); line-height: 1.8; }
.notfound .contact-link { margin-top: 32px; }

/* フッター */
.footer { border-top: 1px solid var(--color-border-tertiary); margin: 0 48px; padding: 32px 0; text-align: center; }
.footer-links { list-style: none; margin-bottom: 12px; }
.footer-links a { font-size: 13px; color: var(--color-accent-strong); text-decoration: none; text-underline-offset: 3px; }
.footer-links a:hover { text-decoration: underline; }
.footer p { font-size: 13px; color: var(--color-text-tertiary); }

@media (max-width: 600px) {
  .hero { padding: 64px 24px 56px; }
  .hero-logo { width: 160px; height: 160px; }
  .hero-name { font-size: 36px; margin-bottom: 48px; }
  .hero-meaning { font-size: 16px; }
  .hero-meaning::after { margin: 28px auto; }
  .hero-mission { font-size: 26px; }
  .divider { margin: 0 24px; }
  .section { padding: 48px 24px; }
  .cards { grid-template-columns: 1fr; gap: 12px; margin-top: 24px; }
  .subpage-header { padding: 20px 24px; }
  .document { padding: 32px 24px 64px; }
  .document h1 { font-size: 24px; }
  .notfound { padding: 64px 24px 96px; }
  .footer { margin: 0 24px; padding: 24px 0; }
}