:root {
  --green: #2f654d;
  --green-soft: #e2efe7;
  --ivory: #f8f6ef;
  --surface: #ffffff;
  --text: #22302a;
  --muted: #7c8a82;
  --border: #e7e3d8;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ivory);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Pretendard',
    'Noto Sans KR', sans-serif;
  font-size: 17px;
  line-height: 1.75;
  word-break: keep-all;
}

header {
  background: var(--green);
  color: var(--ivory);
  padding: 56px 24px 44px;
  text-align: center;
}

header .mark {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  display: block;
}

header h1 {
  margin: 0 0 6px;
  font-size: 30px;
  letter-spacing: -0.5px;
}

header p {
  margin: 0;
  opacity: 0.85;
  font-size: 16px;
}

nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 16px 24px 0;
  flex-wrap: wrap;
}

nav a {
  color: var(--green);
  background: var(--green-soft);
  text-decoration: none;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
}

nav a[aria-current='page'] {
  background: var(--green);
  color: var(--ivory);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 24px 80px;
}

.card {
  background: var(--surface);
  border-radius: 20px;
  padding: 28px;
  margin-bottom: 20px;
}

h2 {
  font-size: 21px;
  margin: 32px 0 10px;
  letter-spacing: -0.3px;
}

h2:first-child {
  margin-top: 0;
}

p,
li {
  margin: 0 0 12px;
}

ul {
  padding-left: 20px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 20px;
  font-size: 15px;
  display: block;
  overflow-x: auto;
}

th,
td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-weight: 600;
}

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

.muted {
  color: var(--muted);
  font-size: 15px;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  padding: 0 24px 56px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ivory: #141d18;
    --surface: #1d2922;
    --text: #edf1ec;
    --muted: #94a39a;
    --border: #2b382f;
    --green-soft: #22362b;
  }
  nav a {
    color: #6fb58f;
  }
  a {
    color: #6fb58f;
  }
}