:root{--bg:#f7f8fb;--card:#fff;--ink:#17202a;--muted:#5c6b7a;--brand:#2f6df6;--brand2:#1e4fc2;--line:#e4e8ef}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",sans-serif;line-height:1.65;font-size:16px}
header{background:var(--card);border-bottom:1px solid var(--line)}
.wrap{max-width:720px;margin:0 auto;padding:0 20px}
nav{display:flex;align-items:center;justify-content:space-between;height:56px}
nav a.logo{font-weight:800;color:var(--ink);text-decoration:none;font-size:18px}
nav .links a{color:var(--muted);text-decoration:none;margin-left:14px;font-size:14px}
main{padding:32px 0 64px}
h1{font-size:28px;line-height:1.3;margin:0 0 12px}h2{font-size:20px;margin:32px 0 8px}h3{font-size:16px;margin:20px 0 6px}
p{margin:8px 0}.lead{font-size:18px;color:var(--muted)}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:14px 22px;border-radius:12px;text-decoration:none;font-weight:700;margin-top:16px}
.btn:hover{background:var(--brand2)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:12px 0}
.grid{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:640px){.grid{grid-template-columns:repeat(3,1fr)}}
table{border-collapse:collapse;width:100%;font-size:14px;margin:8px 0}
th,td{border:1px solid var(--line);padding:8px;text-align:left;vertical-align:top}th{background:#f0f3f8}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding:20px 0}
footer a{color:var(--muted)}
ul{padding-left:20px}.small{font-size:13px;color:var(--muted)}
.hero{text-align:center;padding:24px 0 8px}.hero .emoji{font-size:56px}
details{margin:8px 0;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 14px}summary{cursor:pointer;font-weight:700}