:root {
  color-scheme: light;
  --green: #16a34a;
  --green-dark: #0f5132;
  --text: #1a1a1a;
  --muted: #5b5b5b;
  --bg: #ffffff;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

header {
  background: var(--green);
  color: #fff;
  padding: 24px 20px;
}

header .inner {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

header a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
}

nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
}

nav a {
  color: #eafff0;
}

nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

h1 {
  font-size: 24px;
  margin: 0 0 4px;
  color: var(--green-dark);
}

.stand {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 28px;
}

h2 {
  font-size: 17px;
  margin: 28px 0 8px;
  color: var(--green-dark);
}

p {
  margin: 0 0 14px;
  white-space: pre-line;
}

a {
  color: var(--green);
}

footer {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding-top: 16px;
  color: var(--muted);
  font-size: 13px;
}

.index-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.index-list li {
  margin-bottom: 12px;
}

.index-list a {
  font-size: 17px;
  font-weight: 600;
}