:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #59636e;
  --line: #d1d9e0;
  --soft: #f6f8fa;
  --accent: #1f6feb;
  --accent-fg: #ffffff;
  --code-bg: #f3f4f6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #9198a1;
    --line: #30363d;
    --soft: #161b22;
    --accent: #4493f8;
    --accent-fg: #0d1117;
    --code-bg: #1e242c;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.7 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans KR", "Noto Sans JP", sans-serif;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
a { color: var(--accent); }
img { max-width: 100%; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

.top { border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--bg); z-index: 1; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; height: 56px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--fg); text-decoration: none; }
.brand img { border-radius: 7px; }
.top nav { display: flex; align-items: center; gap: 14px; }
.top nav > a:not(.btn) { color: var(--fg); text-decoration: none; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: var(--accent-fg);
  padding: 12px 20px; border-radius: 999px;
  font-weight: 700; text-decoration: none; line-height: 1.2;
}
.btn:hover { filter: brightness(1.08); }
.btn-sm { padding: 7px 12px; font-size: 14px; }
@media (max-width: 420px) { .btn-sm span { display: none; } .btn-sm { padding: 8px; } }

.hero { text-align: center; padding: 48px 0 32px; }
.hero img { border-radius: 22px; }
.hero h1 { font-size: clamp(28px, 6vw, 42px); line-height: 1.2; margin: 16px 0 12px; }
.lead { font-size: 19px; color: var(--muted); }
.hero small, .cta small { display: block; color: var(--muted); margin-top: 10px; font-size: 14px; }

h2 { font-size: 24px; line-height: 1.3; margin: 40px 0 12px; }
h3 { font-size: 18px; margin: 0 0 4px; }
.features { list-style: none; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.features li { background: var(--soft); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.features p { margin: 0; color: var(--muted); font-size: 15px; }
.privacy-box { background: var(--soft); border-radius: 12px; padding: 4px 20px 12px; margin-top: 32px; }

.guides { list-style: none; padding: 0; margin: 0; }
.guides li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.guides li a { font-weight: 600; }
.guides li span { display: block; color: var(--muted); font-size: 15px; }

.crumbs { font-size: 14px; color: var(--muted); margin-top: 20px; }
.crumbs a { color: var(--muted); }
.doc h1 { font-size: clamp(26px, 5vw, 36px); line-height: 1.25; margin: 12px 0 4px; }
.doc .meta { color: var(--muted); font-size: 14px; margin-top: 0; }
.doc h2 { font-size: 22px; }
.doc li { margin: 4px 0; }
.doc code { background: var(--code-bg); padding: 1px 5px; border-radius: 5px; font-size: 0.9em; }
.doc pre { background: var(--code-bg); padding: 14px; border-radius: 10px; overflow-x: auto; font-size: 14px; line-height: 1.5; }
.doc pre code { background: none; padding: 0; }
.doc table { border-collapse: collapse; display: block; overflow-x: auto; max-width: 100%; }
.doc th, .doc td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.doc blockquote { margin: 16px 0; padding: 4px 16px; border-left: 4px solid var(--accent); background: var(--soft); border-radius: 0 8px 8px 0; }
.inline-cta { text-align: center; margin: 28px 0; }

.cta {
  display: flex; gap: 16px; align-items: flex-start;
  border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin: 40px 0;
  background: var(--soft);
}
.cta img { border-radius: 12px; flex: none; }
.cta p { margin: 4px 0 12px; color: var(--muted); }
@media (max-width: 480px) { .cta { flex-direction: column; } }

.foot { border-top: 1px solid var(--line); margin-top: 48px; padding: 20px 0 32px; color: var(--muted); font-size: 14px; }
.langs a { margin-right: 12px; white-space: nowrap; }
.langs a[aria-current] { font-weight: 700; color: var(--fg); text-decoration: none; }