:root{--blue:#2457f5;--ind:#4f46e5;--ink:#111318;--sub:#5b6478;--mute:#8a92a6;--line:#e7eaf3;--soft:#f3f6ff}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Pretendard Variable',Pretendard,-apple-system,'Malgun Gothic',sans-serif;color:var(--ink);background:#fff;letter-spacing:-0.2px;word-break:keep-all;line-height:1.75;-webkit-text-size-adjust:100%}
a{color:inherit}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
header.top{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:8px;font-weight:900;font-size:20px;text-decoration:none}
.logo img{display:block;width:auto;height:40px}
header nav{display:flex;gap:22px;font-size:15px;font-weight:600;color:var(--sub)}
header nav a{text-decoration:none}header nav a.on{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;background:#111318;color:#fff;border-radius:999px;padding:11px 20px;font-weight:800;font-size:15px;text-decoration:none;white-space:nowrap}
.btn.blue{background:linear-gradient(90deg,var(--blue),var(--ind))}
main.post{max-width:760px;margin:0 auto;padding:40px 20px 80px}
.crumb{font-size:13.5px;color:var(--mute);margin-bottom:18px}.crumb a{text-decoration:none}
.cat{display:inline-block;background:var(--soft);color:var(--blue);font-weight:800;font-size:13px;border-radius:999px;padding:5px 12px;margin-bottom:14px}
h1{font-size:34px;line-height:1.3;font-weight:900;letter-spacing:-1px;margin-bottom:14px}
.meta{font-size:14px;color:var(--mute);margin-bottom:28px}
.summary{background:var(--soft);border:1px solid #dfe7ff;border-radius:18px;padding:22px 24px;margin-bottom:30px}
.summary strong{display:block;font-size:15px;color:var(--blue);margin-bottom:8px}
.summary ul{padding-left:18px}.summary li{margin:4px 0;font-size:16px}
.toc{border:1px solid var(--line);border-radius:16px;padding:18px 22px;margin-bottom:34px;font-size:15px}
.toc b{display:block;margin-bottom:6px}.toc ol{padding-left:18px}.toc a{text-decoration:none;color:var(--sub)}
article h2{font-size:24px;line-height:1.4;font-weight:900;margin:44px 0 14px;letter-spacing:-0.6px;scroll-margin-top:80px}
article h3{font-size:19px;font-weight:800;margin:26px 0 8px}
article p{font-size:17px;margin:0 0 14px;color:#262a33}
article ul,article ol{padding-left:22px;margin:0 0 16px}article li{font-size:17px;margin:6px 0}
article table{width:100%;border-collapse:collapse;margin:8px 0 18px;font-size:15px;display:block;overflow-x:auto}
article th,article td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top;white-space:nowrap}
article th{background:#f7f8fb;font-weight:800}
article td{white-space:normal;min-width:90px}
figure{margin:6px 0 26px}figure img{display:block;width:100%;height:auto;border-radius:16px;border:1px solid var(--line)}figure.cover{margin:0 0 28px}figcaption{font-size:13.5px;color:var(--mute);margin-top:8px;text-align:center}
.card img{display:block;width:100%;height:auto;border-radius:12px;margin-bottom:6px;border:1px solid var(--line)}
.faq{margin-top:48px}.faq h2{margin-top:0}
.faq details{border:1px solid var(--line);border-radius:14px;padding:14px 18px;margin-bottom:10px}
.faq summary{font-weight:800;font-size:16.5px;cursor:pointer}
.faq details p{margin:10px 0 0;font-size:16px}
.cta{margin-top:48px;border-radius:22px;padding:30px 28px;background:linear-gradient(135deg,#0e1430,#1d2b6b);color:#fff}
.cta h2{font-size:24px;margin:0 0 8px;color:#fff}.cta p{color:rgba(255,255,255,.85);font-size:16px;margin-bottom:18px}
.cta .row{display:flex;gap:10px;flex-wrap:wrap}.cta .btn{background:#fff;color:#111318}.cta .btn.ghost{background:rgba(255,255,255,.12);color:#fff}
.cta small{display:block;margin-top:12px;color:rgba(255,255,255,.6);font-size:13px}
.related{margin-top:44px}.related h2{font-size:20px;margin-bottom:12px}
.related a{display:block;padding:12px 0;border-bottom:1px solid var(--line);text-decoration:none;font-weight:700}
.author{margin-top:36px;padding:18px 20px;border-radius:14px;background:#f7f8fb;font-size:14.5px;color:var(--sub)}
footer{border-top:1px solid var(--line);padding:28px 0 40px;font-size:13px;color:var(--mute);line-height:1.8}
.bloghead{padding:56px 0 24px}.bloghead h1{font-size:38px}.bloghead p{color:var(--sub);font-size:17px}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;padding-bottom:80px}
.card{display:block;border:1px solid var(--line);border-radius:20px;padding:24px;text-decoration:none;transition:box-shadow .15s}
.card:hover{box-shadow:0 12px 30px rgba(20,30,80,.08)}
.card h2{font-size:20px;line-height:1.45;font-weight:900;margin:10px 0 8px}
.card p{font-size:15px;color:var(--sub);line-height:1.6}.card .d{font-size:13px;color:var(--mute);margin-top:12px}
@media (max-width:760px){header nav{display:none}h1{font-size:27px}article h2{font-size:21px}.grid{grid-template-columns:1fr}.bloghead h1{font-size:30px}}