:root {
  color-scheme: dark;
  --background: #07130f;
  --surface: #10241c;
  --surface-soft: #183126;
  --text: #f1f7f2;
  --muted: #b7c9bd;
  --accent: #c9ff62;
  --line: #2d4a3b;
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -10%, rgba(201, 255, 98, 0.14), transparent 36rem),
    var(--background);
  color: var(--text);
  line-height: 1.7;
}

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

.shell {
  width: min(760px, calc(100% - 36px));
  margin: 0 auto;
  padding: 44px 0 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 38px;
  color: var(--text);
  text-decoration: none;
}

.brand img {
  width: 68px;
  height: 68px;
  border-radius: 18px;
}

.brand strong {
  display: block;
  font-size: 1.65rem;
  letter-spacing: -0.04em;
}

.brand span { color: var(--muted); }

.hero {
  padding: 44px 0 32px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(2.45rem, 9vw, 4.75rem);
  line-height: 1.05;
  letter-spacing: -0.065em;
}

h2 {
  margin: 42px 0 10px;
  font-size: 1.25rem;
  letter-spacing: -0.025em;
}

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

.lead {
  max-width: 620px;
  font-size: 1.12rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
}

.card {
  min-height: 170px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, var(--surface-soft), var(--surface));
  color: var(--text);
  text-decoration: none;
}

.card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.15rem;
}

.card span { color: var(--muted); }

.document {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(16, 36, 28, 0.82);
}

.document h1 {
  font-size: clamp(2rem, 7vw, 3.35rem);
}

.document ul { padding-left: 1.3rem; }

.note {
  padding: 18px 20px;
  border-left: 3px solid var(--accent);
  border-radius: 0 14px 14px 0;
  background: rgba(201, 255, 98, 0.08);
}

footer {
  margin-top: 42px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 620px) {
  .shell { padding-top: 26px; }
  .cards { grid-template-columns: 1fr; }
  .document { padding: 22px; }
}