:root {
  --color-primary: #0b5c8e;
  --color-text: #1f2933;
  --color-muted: #6b7280;
  --color-bg: #ffffff;
  --color-border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP",
    "Segoe UI", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.nav a {
  margin-left: 24px;
  color: var(--color-text);
}

.hero {
  padding: 96px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2rem;
  margin: 0 0 16px;
}

.hero p {
  color: var(--color-muted);
  margin: 0;
}

.page {
  padding: 64px 0;
}

.page h1 {
  font-size: 1.75rem;
  margin: 0 0 24px;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  color: var(--color-muted);
  text-align: center;
}