:root {
  --color-bg: #ffffff;
  --color-text: #2b2f36;
  --color-muted: #5a6270;
  --color-accent: #2b5faa;
  --color-accent-dark: #1f4680;
  --color-border: #e3e8ef;
  --color-footer-bg: #f4f7fb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic",
    "Meiryo", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 40px 0;
}

.site-header h1 {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.5;
}

main {
  padding: 48px 24px 64px;
}

section {
  margin-bottom: 40px;
}

section:last-child {
  margin-bottom: 0;
}

h2 {
  font-size: 1.15rem;
  color: var(--color-accent-dark);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 10px;
  margin-bottom: 16px;
}

p {
  margin: 0 0 12px;
  color: var(--color-text);
}

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

ul {
  margin: 0 0 12px;
  padding-left: 1.4em;
}

li {
  margin-bottom: 6px;
}

.contact-email {
  display: inline-block;
  background-color: var(--color-footer-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 10px 16px;
  font-weight: 600;
  color: var(--color-accent-dark);
}

.site-footer {
  background-color: var(--color-footer-bg);
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  margin-top: 0;
}

.site-footer p {
  margin: 0;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
}

@media (max-width: 480px) {
  .site-header {
    padding: 28px 0;
  }

  .site-header h1 {
    font-size: 1.3rem;
  }

  main {
    padding: 32px 16px 48px;
  }

  h2 {
    font-size: 1.05rem;
  }
}