:root {
  color-scheme: dark;
  font-family: "Noto Sans KR", system-ui, sans-serif;
  color: #f5f3ed;
  background: #111719;
  line-height: 1.8;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
a {
  color: #efc476;
  text-underline-offset: 4px;
}
header,
main,
footer {
  width: min(920px, 100% - 40px);
  margin: auto;
}
header {
  padding: 24px 0;
  border-bottom: 1px solid #344043;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
  font-weight: 800;
  font-size: 20px;
}
.brand img {
  border-radius: 12px;
}
main {
  padding: 48px 0 64px;
}
h1 {
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.3;
  margin: 0 0 20px;
  letter-spacing: -0.04em;
}
h2 {
  font-size: 21px;
  line-height: 1.5;
  margin: 36px 0 12px;
}
h3 {
  font-size: 18px;
  line-height: 1.5;
  margin: 28px 0 8px;
}
p {
  margin: 12px 0;
}
.intro {
  font-size: 19px;
  color: #d4dedc;
  max-width: 680px;
}
.tag {
  color: #efc476;
  font-size: 14px;
  font-weight: 700;
}
.button {
  display: inline-block;
  padding: 12px 22px;
  margin: 18px 0 8px;
  background: #e9b75b;
  color: #171c1e;
  border-radius: 12px;
  font-weight: 800;
  text-decoration: none;
}
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 36px 0;
}
.features section {
  border: 1px solid #344043;
  border-radius: 16px;
  padding: 20px;
  background: #1a2326;
}
.features h2 {
  margin: 0 0 10px;
  font-size: 19px;
}
.features p {
  color: #d4dedc;
  margin: 0;
}
ul,
ol {
  padding-left: 24px;
}
li {
  margin: 6px 0;
}
.document {
  max-width: 760px;
}
.document h1 {
  font-size: 32px;
}
footer {
  border-top: 1px solid #344043;
  padding: 24px 0 36px;
  font-size: 14px;
  color: #b6c6c3;
}
footer nav {
  display: flex;
  gap: 12px 24px;
  flex-wrap: wrap;
}
.note {
  color: #b6c6c3;
  font-size: 14px;
}
@media (max-width: 620px) {
  header,
  main,
  footer {
    width: calc(100% - 32px);
  }
  main {
    padding-top: 32px;
  }
  .features {
    grid-template-columns: 1fr;
  }
  header {
    gap: 12px;
  }
  .brand {
    font-size: 18px;
  }
  header > a:last-child {
    font-size: 14px;
  }
  h2 {
    margin-top: 28px;
  }
}