:root {
  --bg: #fafaf9;
  --text: #1c1c1a;
  --muted: #6b6b66;
  --accent: #2a5d4c;
  --border: #e2e0da;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Pretendard", "Apple SD Gothic Neo", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header {
  border-bottom: 1px solid var(--border);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
}

.logo {
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
  font-size: 18px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 24px;
  font-size: 15px;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--accent);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px;
}

h1 {
  font-size: 32px;
  margin-bottom: 8px;
}

p.lead {
  color: var(--muted);
  font-size: 17px;
}

footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  margin-top: 64px;
}