:root {
  color: #f6f3ec;
  background: #090a0c;
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  line-height: 1.65;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 85% 5%, rgba(92, 220, 244, .12), transparent 30rem),
    #090a0c;
}

main {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 48px;
}

header { margin-bottom: 48px; }

.eyebrow {
  color: #5cdcf4;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .36em;
}

h1 {
  margin: 8px 0 12px;
  font-size: clamp(2.25rem, 8vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: -.04em;
}

.lede { color: #b8bac1; font-size: 1.05rem; }

section {
  margin: 18px 0;
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 20px;
  background: rgba(255, 255, 255, .035);
}

.summary { border-color: rgba(92, 220, 244, .3); }
h2 { margin: 0 0 16px; font-size: 1.25rem; }
h3 { margin: 24px 0 6px; font-size: 1rem; color: #5cdcf4; }
p, li { color: #c7c8ce; }
a { color: #5cdcf4; }
.fine { color: #92949c; font-size: .88rem; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 32px;
  color: #777a82;
  font-size: .82rem;
}

@media (max-width: 560px) {
  main { width: min(100% - 24px, 760px); padding-top: 40px; }
  section { padding: 20px; }
  footer { flex-direction: column; }
}