:root {
  color: #173b28;
  background: #f5faf4;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-kerning: normal;
}

* { box-sizing: border-box; }

body {
  width: min(calc(100% - 32px), 760px);
  margin: 40px auto;
  padding: clamp(28px, 6vw, 52px);
  border: 1px solid #d9e9db;
  border-radius: 24px;
  color: #173b28;
  background: #fff;
  box-shadow: 0 16px 45px #173b2812;
}

a { color: #17633c; text-underline-offset: 3px; }
body > a:first-child { display: inline-block; margin-bottom: 20px; font-size: .9rem; font-weight: 700; }
h1, h2, h3 { line-break: strict; text-wrap: balance; word-break: normal; }
h1 { margin: 0 0 24px; color: #123923; font-size: clamp(2rem, 7vw, 3rem); line-height: 1.2; letter-spacing: -.04em; }
h2 { margin: 36px 0 10px; color: #173b28; font-size: 1.2rem; }
p, li { color: #486052; line-height: 1.85; text-wrap: pretty; }
.notice { padding: 16px 18px; border: 1px solid #b9d3bf; border-radius: 12px; color: #14532d; background: #f2f8f2; font-weight: 700; }
footer { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 44px; padding-top: 24px; border-top: 1px solid #e1ece3; font-size: .85rem; }
.not-found .eyebrow { margin: 0 0 12px; color: #247449; font-size: .85rem; font-weight: 800; letter-spacing: .08em; }
.not-found .button-link { display: inline-block; margin-top: 12px; padding: 12px 18px; border-radius: 10px; color: #fff; background: #17633c; font-weight: 800; text-decoration: none; }
.not-found .button-link:hover { background: #124f30; }

@media (max-width: 520px) {
  body { width: 100%; margin: 0; padding: 28px 20px 40px; border: 0; border-radius: 0; box-shadow: none; }
}