:root {
  color-scheme: light dark;
  --bg: #0b1020;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-border: rgba(17, 24, 39, 0.08);
  --text: #111827;
  --muted: #4b5563;
  --accent: #ef4444;
  --accent-soft: rgba(239, 68, 68, 0.12);
  --link: #d92d20;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #050816;
    --panel: rgba(17, 24, 39, 0.9);
    --panel-border: rgba(255, 255, 255, 0.08);
    --text: #f9fafb;
    --muted: #cbd5e1;
    --accent-soft: rgba(248, 113, 113, 0.18);
    --link: #fca5a5;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(239, 68, 68, 0.18), transparent 28%),
    radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.16), transparent 26%),
    var(--bg);
  color: var(--text);
  line-height: 1.7;
}
main {
  width: min(920px, calc(100vw - 32px));
  margin: 48px auto 80px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  backdrop-filter: blur(20px);
  padding: 32px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.18);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.02em;
}
h1 {
  margin: 18px 0 10px;
  font-size: clamp(32px, 5vw, 46px);
  line-height: 1.15;
}
h2 {
  margin-top: 40px;
  margin-bottom: 12px;
  font-size: clamp(20px, 2.6vw, 28px);
}
h3 {
  margin-top: 28px;
  margin-bottom: 8px;
  font-size: 18px;
}
p, li, td, th {
  color: var(--muted);
  font-size: 16px;
}
a { color: var(--link); }
nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}
nav a {
  text-decoration: none;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid var(--panel-border);
  background: rgba(255,255,255,0.5);
  color: var(--text);
  font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  nav a { background: rgba(15,23,42,0.65); }
}
.meta {
  margin-top: 18px;
  display: grid;
  gap: 8px;
}
.meta span {
  color: var(--muted);
  font-size: 14px;
}
.section-note {
  margin: 20px 0;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(148, 163, 184, 0.12);
}
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}
th, td {
  border-bottom: 1px solid var(--panel-border);
  text-align: left;
  vertical-align: top;
  padding: 14px 10px;
}
ul { padding-left: 20px; }
.footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--panel-border);
  font-size: 14px;
  color: var(--muted);
}
@media (max-width: 640px) {
  main { width: min(100vw - 20px, 920px); margin-top: 20px; }
  .card { padding: 22px 18px; border-radius: 22px; }
  nav a { width: 100%; text-align: center; }
}