*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans KR","Apple SD Gothic Neo",sans-serif;line-height:1.65;color:#1f1b4d;background:#f7f7fc}
a{color:#4a4ae0}
header{background:#5B5BF0;color:#fff;padding:20px 16px}
header .wrap{display:flex;align-items:center;gap:12px}
header img{width:48px;height:48px;border-radius:12px}
header a{color:#fff;text-decoration:none;font-weight:700;font-size:1.4rem}
nav{margin-left:auto;font-size:.95rem}
nav a{font-size:.95rem;font-weight:500;margin-left:14px}
.wrap{max-width:820px;margin:0 auto}
main{padding:24px 16px 48px}
h1{font-size:1.7rem;margin:.2em 0 .6em}
h2{font-size:1.25rem;margin-top:1.8em;border-bottom:2px solid #e3e3f5;padding-bottom:4px}
h3{font-size:1.05rem;margin-top:1.4em}
.card{background:#fff;border:1px solid #e3e3f5;border-radius:14px;padding:16px 18px;margin:12px 0}
.card h3{margin:0 0 4px}
.pkg{color:#6b6b8a;font-size:.85rem;font-family:ui-monospace,Menlo,monospace}
.btn{display:inline-block;margin-top:8px;padding:8px 14px;background:#5B5BF0;color:#fff;border-radius:8px;text-decoration:none;font-weight:600}
.lang{background:#fff;border:1px solid #e3e3f5;border-radius:14px;padding:4px 20px 16px;margin:20px 0}
.toc a{margin-right:14px}
.muted{color:#6b6b8a;font-size:.9rem}
footer{border-top:1px solid #e3e3f5;padding:20px 16px;color:#6b6b8a;font-size:.9rem;text-align:center}
@media(max-width:560px){header .wrap{flex-wrap:wrap}nav{margin-left:0;width:100%}nav a{margin:0 14px 0 0}h1{font-size:1.45rem}}