:root{
  --blue:#2563eb;--blue-dark:#1d4ed8;--blue-soft:#eff6ff;--navy:#0b1220;
  --ink:#172033;--muted:#5d6b82;--line:#dce3ed;--surface:#fff;--soft:#f6f8fb;--mint:#0f766e;
  --shadow-sm:0 8px 30px rgba(15,23,42,.07);--shadow-lg:0 24px 60px rgba(15,23,42,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--surface);
  font-family:Pretendard,"Apple SD Gothic Neo","Noto Sans KR",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;word-break:keep-all;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:3px;z-index:100;
  background:linear-gradient(90deg,var(--blue),#60a5fa,#14b8a6)}
a{color:inherit;text-decoration:none}
strong{color:var(--navy)}
.wrap{width:min(820px,calc(100% - 40px));margin-inline:auto}
.wrap.wide{width:min(1080px,calc(100% - 40px))}

/* header */
.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(220,227,237,.8);
  background:rgba(255,255,255,.9);backdrop-filter:blur(16px)}
.nav{display:flex;min-height:66px;align-items:center;justify-content:space-between;gap:20px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--navy);font-size:21px;font-weight:900;letter-spacing:-.04em}
.logo-mark{display:grid;width:32px;height:32px;place-items:center;border-radius:10px;color:#fff;background:var(--blue);
  box-shadow:0 8px 18px rgba(37,99,235,.24);font-size:16px}
.nav-links{display:flex;align-items:center;gap:22px;font-size:14px;font-weight:700;color:#445169}
.nav-links a:hover{color:var(--blue)}
.nav .btn{color:#fff;background:var(--blue);padding:9px 16px;border-radius:10px;box-shadow:0 8px 18px rgba(37,99,235,.22)}
@media(max-width:640px){.nav-links a:not(.btn){display:none}}

/* blog index */
.blog-hero{padding:64px 0 20px;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;color:var(--blue-dark);font-size:13px;font-weight:800;letter-spacing:.04em}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px rgba(37,99,235,.11)}
.blog-hero h1{margin:0;color:var(--navy);font-size:clamp(32px,5vw,46px);letter-spacing:-.04em;line-height:1.2}
.blog-hero p{margin:14px auto 0;max-width:560px;color:var(--muted);font-size:17px}
.post-list{display:grid;gap:18px;padding:36px 0 30px}
.post-card{display:block;padding:26px 28px;border:1px solid var(--line);border-radius:18px;background:#fff;
  box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.post-card .cat{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.04em}
.post-card h2{margin:8px 0 8px;color:var(--navy);font-size:clamp(20px,2.6vw,25px);letter-spacing:-.03em;line-height:1.35}
.post-card p{margin:0;color:var(--muted);font-size:15px}
.post-card .more{display:inline-block;margin-top:14px;color:var(--blue-dark);font-weight:800;font-size:14px}
.soon{opacity:.62;pointer-events:none}
.soon .more{color:var(--muted)}

/* article */
.article{padding:40px 0 20px}
.article .cat{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.04em}
.article h1{margin:10px 0 10px;color:var(--navy);font-size:clamp(28px,4.4vw,40px);letter-spacing:-.04em;line-height:1.24}
.article .meta{color:var(--muted);font-size:14px;border-bottom:1px solid var(--line);padding-bottom:20px}
.article-body{padding:26px 0 8px;font-size:17px;color:#28324a}
.article-body h2{margin:34px 0 10px;color:var(--navy);font-size:clamp(21px,2.8vw,26px);letter-spacing:-.03em}
.article-body p{margin:14px 0}
.article-body ul{margin:14px 0;padding-left:20px}
.article-body li{margin:7px 0}
.article-body a{color:var(--blue-dark);text-decoration:underline;font-weight:700}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:26px 0 6px}
.tags span{padding:5px 11px;border-radius:99px;background:var(--blue-soft);color:var(--blue-dark);font-size:12px;font-weight:700}
.cta-box{margin:34px 0 10px;padding:28px;border-radius:18px;color:#fff;text-align:center;
  background:linear-gradient(135deg,#163ca6,var(--blue) 60%,#3378f4);box-shadow:0 20px 50px rgba(37,99,235,.22)}
.cta-box h3{margin:0 0 8px;font-size:22px;letter-spacing:-.03em}
.cta-box p{margin:0 0 18px;color:#dbeafe;font-size:15px}
.cta-box .btn{display:inline-block;color:var(--blue-dark);background:#fff;padding:13px 24px;border-radius:12px;font-weight:800;box-shadow:0 12px 30px rgba(7,23,63,.18)}
.backlink{display:inline-block;margin:22px 0 0;color:var(--muted);font-weight:700;font-size:14px}

footer{margin-top:40px;padding:30px 0 44px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;text-align:center}