* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: #222;
  background: #f7f7f7;
  line-height: 1.7;
}

a {
  color: inherit;
}

.container {
  width: min(100% - 32px, 960px);
  margin-inline: auto;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
}

.site-header .container {
  padding: 18px 0;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  text-decoration: none;
}

main {
  padding: 48px 0 72px;
}

.hero {
  margin-bottom: 56px;
}

.hero h1 {
  margin-bottom: 8px;
  font-size: clamp(28px, 5vw, 42px);
}

.hero p {
  margin: 0;
  color: #555;
}

h2 {
  margin-bottom: 24px;
}

.tool-grid {
  display: grid;
  gap: 20px;
}

.tool-card {
  display: block;
  padding: 24px;
  background: #fff;
  border: 1px solid #e3e3e3;
  border-radius: 12px;
  text-decoration: none;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease;
}

.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.tool-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.tool-card p {
  margin-bottom: 16px;
  color: #555;
}

.tool-card span {
  font-weight: 600;
}

.site-footer {
  padding: 32px 0;
  background: #fff;
  border-top: 1px solid #e5e5e5;
  text-align: center;
  font-size: 14px;
  color: #666;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 16px;
}

.footer-links a {
  color: #555;
}

@media (max-width: 600px) {
  main {
    padding-top: 32px;
  }

  .tool-card {
    padding: 20px;
  }
}

.policy-page {
  max-width: 760px;
}

.policy-page h1 {
  margin-top: 0;
  margin-bottom: 32px;
  font-size: clamp(28px, 5vw, 38px);
}

.policy-page h2 {
  margin-top: 48px;
  margin-bottom: 16px;
  font-size: 22px;
}

.policy-page h3 {
  margin-top: 28px;
  margin-bottom: 12px;
  font-size: 18px;
}

.policy-page p {
  margin: 0 0 16px;
}

.policy-page a {
  text-decoration: underline;
}

.updated-date {
  margin-top: 48px !important;
  color: #666;
  font-size: 14px;
}

.contact-address {
  margin: 28px 0 !important;
  font-size: 20px;
  font-weight: 600;
}