:root {
  --bg: #f7f5f1;
  --surface: #ffffff;
  --text-primary: #1c1c1c;
  --text-secondary: #4a4a4a;
  --text-muted: #8a8a8a;
  --border: rgba(0, 0, 0, 0.06);
  --shadow: 0 1px 6px rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text-primary);
  font-family:
    -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
    "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.page-title {
  font-family: "Source Serif 4", "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-weight: 600;
  font-size: 28px;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  text-align: center;
  color: var(--text-primary);
}

.meta {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin: 0 0 24px;
}

.card {
  background-color: var(--surface);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.card > section + section {
  margin-top: 28px;
}

.section-title {
  font-weight: 600;
  font-size: 16px;
  color: var(--text-primary);
  margin: 0 0 10px;
}

.card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0 0 10px;
  white-space: pre-line;
}

.card p:last-child {
  margin-bottom: 0;
}

.card strong {
  color: var(--text-primary);
  font-weight: 600;
}

.card a {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.footer a {
  color: var(--text-muted);
  text-decoration: none;
  margin: 0 8px;
}

.footer a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

@media (max-width: 480px) {
  .container {
    padding: 20px 16px 48px;
  }

  .page-title {
    font-size: 24px;
  }

  .card {
    padding: 20px;
    border-radius: 14px;
  }
}