:root {
  color-scheme: dark light;
  --bg: #0c0c0e;
  --surface: #16161a;
  --text: #f2f2f4;
  --muted: #9a9aa3;
  --border: #2a2a32;
  --link: #8ab4ff;
  --accent: #c4b5fd;
  --max: 40rem;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f7f8;
    --surface: #ffffff;
    --text: #141418;
    --muted: #5c5c66;
    --border: #e2e2e8;
    --link: #1a5fb4;
    --accent: #5b4bdb;
  }
}

* {
  box-sizing: border-box;
}

html {
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR",
    "Apple SD Gothic Neo", Helvetica, Arial, sans-serif;
  line-height: 1.65;
  background: var(--bg);
  color: var(--text);
}

a {
  color: var(--link);
  text-underline-offset: 0.15em;
}

header,
main,
footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem 1.25rem 0;
}

header {
  padding-top: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.brand {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 0.35rem;
}

h1 {
  font-size: 1.65rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
  font-weight: 700;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

.lang-switch {
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

main h2 {
  font-size: 1.1rem;
  margin: 2rem 0 0.6rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  font-weight: 700;
}

main h2:first-of-type {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

main p,
main li {
  color: var(--text);
}

main ul {
  padding-left: 1.2rem;
  margin: 0.4rem 0 0.8rem;
}

main li {
  margin-bottom: 0.35rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin: 1rem 0;
}

.card strong {
  color: var(--accent);
}

.callout {
  border-left: 3px solid var(--accent);
  padding-left: 0.9rem;
  margin: 1rem 0;
  color: var(--muted);
}

footer {
  padding: 2rem 1.25rem 3rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 2.5rem;
}

.home-links {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.home-links li {
  margin-bottom: 0.75rem;
}

.home-links a {
  display: block;
  padding: 0.9rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}

.home-links a:hover {
  border-color: var(--accent);
}

.home-links span {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.2rem;
}