:root {
  color-scheme: dark;
  --bg: #111316;
  --panel: #1a1d22;
  --line: #2a2e35;
  --text: #eef1f4;
  --muted: #9aa3ad;
  --accent: #7fd39a;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 'Pretendard', 'Malgun Gothic', system-ui, sans-serif;
}
a {
  color: var(--accent);
}
.top,
main,
footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 18px;
  padding-bottom: 18px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 20px;
  color: var(--text);
  text-decoration: none;
}
.top nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
}
.top nav a {
  color: var(--muted);
}
.hero {
  padding: 40px 0 28px;
}
.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1.3;
}
.hero p {
  max-width: 640px;
  color: var(--muted);
}
.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  font-size: 14px;
}
.button small {
  margin-left: 4px;
  font-weight: 600;
  opacity: 0.7;
}
.button {
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--accent);
  color: #0e1a12;
  font-weight: 700;
  text-decoration: none;
}
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
figure {
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
}
figure img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto 12px;
  border-radius: 6px;
}
figcaption {
  color: var(--muted);
  font-size: 15px;
}
figcaption b {
  display: block;
  color: var(--text);
}
.list {
  padding: 28px 0;
}
.list ul {
  padding-left: 20px;
}
.note {
  color: var(--muted);
  font-size: 14px;
}
.doc h1 {
  font-size: 28px;
}
.doc h2 {
  margin-top: 28px;
  font-size: 19px;
}
.doc p,
.doc li {
  color: #cfd5db;
}
footer {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
  padding-bottom: 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
footer a {
  color: var(--muted);
}
.guide-link {
  font-size: 14px;
}