:root {
  color-scheme: light dark;
  --background: #f7f6f2;
  --ink: #171716;
  --muted: #55544f;
  --rule: #cfcec7;
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --background: #141414;
    --ink: #f5f3ed;
    --muted: #bbb9b1;
    --rule: #44433e;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--background); color: var(--ink); }
a { color: inherit; text-underline-offset: .24em; }
.shell { width: min(100% - 2.5rem, 64rem); margin-inline: auto; }
.masthead, .footer { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding-block: 1.3rem; }
.brand { font-size: 1.2rem; font-weight: 800; text-decoration: none; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(12rem, .8fr); align-items: center; gap: clamp(2rem, 7vw, 6rem); padding-block: clamp(3rem, 10vw, 7rem); }
.eyebrow { color: var(--muted); font-weight: 700; }
h1 { font-size: clamp(2.5rem, 7vw, 5rem); line-height: 1.06; letter-spacing: -.055em; margin: .65rem 0 1.35rem; }
h2 { margin-top: 0; font-size: 1.15rem; }
p, li { line-height: 1.7; }
.lead { max-width: 26rem; color: var(--muted); font-size: 1.12rem; }
.button { display: inline-block; margin-top: .6rem; border-radius: 2rem; background: var(--ink); color: var(--background); padding: .7rem 1.15rem; font-weight: 700; text-decoration: none; }
.cover { display: block; width: 100%; height: auto; border-radius: 22%; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; padding-block: 2rem 3rem; border-top: 1px solid var(--rule); }
.features p, .footer { color: var(--muted); }
.footer { flex-wrap: wrap; border-top: 1px solid var(--rule); font-size: .875rem; }
.footer nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.document { max-width: 44rem; padding-block: 3rem 4rem; }
.document h1 { font-size: clamp(2.25rem, 5vw, 3.25rem); }
.document h2 { margin: 2rem 0 .5rem; }
.document ul { padding-left: 1.35rem; }
.document li + li { margin-top: .45rem; }
@media (max-width: 40rem) {
  .hero, .features { grid-template-columns: 1fr; }
  .cover { max-width: 18rem; }
}