:root {
  color-scheme: light;
  --background: #fcfcfa;
  --text: #171714;
  --text-soft: #454540;
  --text-muted: #8c8b84;
  --line: #e4e4de;
  --accent: #b79258;
}

* {
  box-sizing: border-box;
}

body {
  background: var(--background);
  color: var(--text);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  line-height: 1.8;
  margin: 0;
  min-height: 100vh;
}

a {
  color: var(--text-soft);
}

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

.page {
  margin: 0 auto;
  max-width: 680px;
  padding: 48px 24px 80px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
  padding-bottom: 24px;
}

.logo {
  color: var(--text);
  font-size: 14px;
  letter-spacing: 0.35em;
  margin: 0;
  text-decoration: none;
}

.lead {
  color: var(--text-muted);
  font-size: 13px;
  margin: 12px 0 0;
}

h1 {
  font-size: 28px;
  font-weight: 500;
  line-height: 1.5;
  margin: 0 0 12px;
}

h2 {
  border-top: 1px solid var(--line);
  font-size: 15px;
  font-weight: 600;
  margin: 32px 0 12px;
  padding-top: 24px;
}

h2:first-of-type {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

p,
li {
  color: var(--text-soft);
  font-size: 14px;
  margin: 0 0 12px;
}

ul {
  margin: 0 0 12px;
  padding-left: 1.2em;
}

.meta {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 32px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 20px;
}

.nav a {
  font-size: 13px;
  text-decoration: none;
}

.button {
  background: var(--text);
  border: none;
  border-radius: 999px;
  color: var(--background);
  display: inline-block;
  font-size: 13px;
  margin-top: 20px;
  padding: 12px 24px;
  text-decoration: none;
}

.button:hover {
  color: var(--background);
  opacity: 0.92;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-top: 28px;
  padding: 20px 22px;
}

.card-title {
  color: var(--text);
  font-size: 14px;
  margin: 0 0 8px;
}

.card-body {
  font-size: 13px;
  margin: 0;
}

@media (max-width: 640px) {
  .page {
    padding: 32px 20px 64px;
  }

  h1 {
    font-size: 24px;
  }
}