:root[data-theme="light"]{--bg:#fff;--soft:#f5f6f8;--card:#fff;--ink:#15171c;--muted:#6b7280;--line:#e7e9ef}
:root[data-theme="dark"]{--bg:#0a0b0d;--soft:#15171c;--card:#101216;--ink:#e9ebf0;--muted:#888e9b;--line:rgba(255,255,255,.08)}
:root{--brand:#3b6cff;--brand2:#7a5bff;--mint:#16c79a}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Pretendard',system-ui,sans-serif;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;line-height:1.75}
a{color:var(--brand);text-decoration:none}
img{max-width:100%}
nav{border-bottom:1px solid var(--line);position:sticky;top:0;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(10px);z-index:20}
.nav-in{max-width:920px;margin:0 auto;padding:0 22px;height:62px;display:flex;align-items:center;gap:10px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:18px;color:var(--ink)}
.logo img{width:28px;height:28px;border-radius:8px}
.nav-r{margin-left:auto;display:flex;gap:8px;align-items:center}
.nav-r a{font-size:13.5px;color:var(--muted);border:1px solid var(--line);padding:8px 13px;border-radius:10px}
.nav-r a.cta{color:#fff;background:var(--brand);border-color:var(--brand)}
.nav-r a:hover{color:var(--ink)}
.nav-r a.cta:hover{color:#fff;opacity:.92}
.theme-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:transparent;color:var(--ink);cursor:pointer;font-size:15px}
.wrap{max-width:920px;margin:0 auto;padding:0 22px}
/* 블로그 홈 */
.bloghero{padding:54px 0 30px;border-bottom:1px solid var(--line);margin-bottom:38px}
.bloghero .ey{color:var(--brand);font-weight:800;font-size:13px;letter-spacing:.5px}
.bloghero h1{font-size:clamp(28px,5vw,40px);font-weight:800;letter-spacing:-1.2px;margin:10px 0 12px}
.bloghero p{color:var(--muted);font-size:16px;max-width:620px}
.posts{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;padding-bottom:70px}
.post-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;transition:.16s;color:var(--ink)}
.post-card:hover{transform:translateY(-3px);box-shadow:0 18px 40px -22px rgba(20,30,60,.4);border-color:color-mix(in srgb,var(--brand) 40%,var(--line))}
.post-card .tag{display:inline-block;font-size:11px;font-weight:800;color:var(--brand);background:color-mix(in srgb,var(--brand) 12%,transparent);padding:3px 9px;border-radius:20px}
.post-card h2{font-size:19px;font-weight:800;letter-spacing:-.4px;margin:14px 0 8px;line-height:1.4}
.post-card p{color:var(--muted);font-size:13.5px;line-height:1.65}
.post-card .meta{margin-top:14px;font-size:12px;color:var(--muted)}
/* 글 본문 */
article{padding:44px 0 30px;max-width:720px;margin:0 auto}
article .tag{display:inline-block;font-size:11.5px;font-weight:800;color:var(--brand);background:color-mix(in srgb,var(--brand) 12%,transparent);padding:3px 10px;border-radius:20px}
article h1{font-size:clamp(26px,4.4vw,36px);font-weight:800;letter-spacing:-1px;margin:14px 0 12px;line-height:1.28}
article .meta{color:var(--muted);font-size:13px;margin-bottom:30px;padding-bottom:22px;border-bottom:1px solid var(--line)}
article h2{font-size:21px;font-weight:800;letter-spacing:-.4px;margin:34px 0 12px}
article h3{font-size:17px;font-weight:700;margin:24px 0 8px}
article p{font-size:15.5px;color:var(--ink);margin:12px 0;line-height:1.85}
article ul,article ol{margin:12px 0 12px 22px}
article li{font-size:15.5px;margin:7px 0;line-height:1.8}
article strong{font-weight:700}
article .lead{font-size:17px;color:var(--muted);line-height:1.8}
.cta-box{background:linear-gradient(135deg,color-mix(in srgb,var(--brand) 12%,transparent),color-mix(in srgb,var(--brand2) 12%,transparent));border:1px solid color-mix(in srgb,var(--brand) 30%,var(--line));border-radius:18px;padding:28px;margin:34px 0;text-align:center}
.cta-box b{font-size:18px;display:block;margin-bottom:6px}
.cta-box p{color:var(--muted);font-size:14px;margin:0 0 16px}
.cta-box a{display:inline-block;background:var(--brand);color:#fff;font-weight:700;padding:12px 26px;border-radius:12px;font-size:15px}
.tablewrap{overflow-x:auto;margin:16px 0}
article table{border-collapse:collapse;width:100%;font-size:14px}
article th,article td{border:1px solid var(--line);padding:10px 12px;text-align:left}
article th{background:var(--soft);font-weight:700}
.rel{margin:40px 0 0;padding-top:26px;border-top:1px solid var(--line)}
.rel b{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}
.rel a{display:block;padding:8px 0;font-weight:600}
footer{border-top:1px solid var(--line);margin-top:40px;padding:26px;color:var(--muted);font-size:12.5px;text-align:center}
footer a{color:var(--muted);margin:0 8px}
footer a:hover{color:var(--ink)}