:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --surface: rgba(255, 255, 255, 0.86);
  --surface-strong: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.1);
  --accent: #0071e3;
  --accent-soft: rgba(0, 113, 227, 0.09);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0d;
    --surface: rgba(28, 28, 30, 0.88);
    --surface-strong: #1c1c1e;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #2997ff;
    --accent-soft: rgba(41, 151, 255, 0.13);
    --shadow: 0 20px 56px rgba(0, 0, 0, 0.28);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(45% 34% at 8% 0%, rgba(80, 160, 255, 0.13), transparent 75%),
    radial-gradient(38% 32% at 96% 5%, rgba(255, 95, 150, 0.1), transparent 75%),
    var(--bg);
  font-family: "Pretendard Variable", "Pretendard", -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  line-height: 1.68;
  letter-spacing: -0.015em;
}

a { color: var(--accent); text-underline-offset: 3px; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 12px 16px;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.brand-logo, .brand-logo img { display: block; }
.brand-logo { width: 116px; }
.brand-logo img { width: 100%; height: auto; }

.legal-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  white-space: nowrap;
}

.legal-nav a { color: var(--muted); text-decoration: none; }
.legal-nav a[aria-current="page"] { color: var(--accent); font-weight: 700; }

main {
  width: min(920px, calc(100% - 32px));
  margin: 48px auto 72px;
}

.hero { margin: 0 0 28px; }

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 6vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

.lead {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.dates {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.notice {
  margin: 26px 0;
  padding: 18px 20px;
  border: 1px solid color-mix(in srgb, var(--accent) 32%, var(--line));
  border-radius: 18px;
  background: var(--accent-soft);
}

.document {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.toc {
  padding: 24px 28px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-strong) 62%, transparent);
}

.toc strong { display: block; margin-bottom: 8px; }

.toc ol {
  columns: 2;
  column-gap: 36px;
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
}

.toc li { break-inside: avoid; margin: 4px 0; }
.toc a { color: var(--muted); text-decoration: none; }

section {
  padding: 30px 32px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 84px;
}

section:last-child { border-bottom: 0; }

h2 {
  margin: 0 0 14px;
  font-size: 22px;
  line-height: 1.35;
  letter-spacing: -0.035em;
}

h3 { margin: 24px 0 8px; font-size: 17px; }
p { margin: 10px 0; }
ul, ol { margin: 10px 0; padding-left: 22px; }
li + li { margin-top: 5px; }

.table-wrap {
  overflow-x: auto;
  margin: 16px 0;
  border: 1px solid var(--line);
  border-radius: 14px;
}

table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: color-mix(in srgb, var(--surface-strong) 76%, transparent);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.01em;
}

tr:last-child td { border-bottom: 0; }

.callout {
  margin: 16px 0;
  padding: 15px 17px;
  border-left: 3px solid var(--accent);
  border-radius: 0 12px 12px 0;
  background: var(--accent-soft);
}

.small { color: var(--muted); font-size: 13px; }

footer {
  padding: 28px 16px 40px;
  color: var(--muted);
  text-align: center;
  font-size: 12px;
}

footer a { color: inherit; }

@media (max-width: 640px) {
  .topbar-inner { align-items: flex-start; }
  .legal-nav { gap: 10px; font-size: 12px; }
  main { margin-top: 34px; }
  .toc ol { columns: 1; }
  section { padding: 24px 20px; }
  .toc { padding: 22px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}