:root{--bg:#f6f7f9;--card:#fff;--ink:#1d2129;--muted:#5d6675;--line:#e3e6ea;--accent:#2563eb;--accent-ink:#fff}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:"Pretendard","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;line-height:1.6}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
header.top{background:var(--card);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{font-weight:700;font-size:18px;color:var(--ink)}
nav.menu a{margin-left:16px;color:var(--muted);font-size:14px}
main{padding:28px 0 48px}
h1{font-size:26px;margin:0 0 8px}h2{font-size:20px;margin:28px 0 8px}
p.lead{color:var(--muted);margin:0 0 20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin:16px 0}
.drop{border:2px dashed #b9c2d0;border-radius:12px;padding:36px 16px;text-align:center;background:#fbfcfe;cursor:pointer}
.drop.on{border-color:var(--accent);background:#eef3ff}
.drop strong{display:block;font-size:17px;margin-bottom:6px}
.drop span{color:var(--muted);font-size:14px}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);border:0;border-radius:8px;padding:10px 16px;font-size:14px;cursor:pointer;margin:4px 6px 4px 0}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn:disabled{opacity:.5;cursor:default}
.tools{display:flex;flex-wrap:wrap;align-items:center;gap:4px;margin:12px 0}
.status{font-size:14px;color:var(--muted);margin:8px 0}
.status.err{color:#b91c1c}
#viewer{min-height:200px;background:#e8eaed;border-radius:8px;overflow:auto;max-height:80vh}
#viewer:empty{display:none}
#textout{width:100%;min-height:200px;max-height:60vh;font:14px/1.6 inherit;border:1px solid var(--line);border-radius:8px;padding:12px;white-space:pre-wrap}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.grid .card{margin:0}
.grid .card h3{margin:0 0 6px;font-size:16px}
.grid .card p{margin:0;color:var(--muted);font-size:14px}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding:20px 0}
footer a{color:var(--muted);margin-right:12px}
.faq dt{font-weight:600;margin-top:14px}.faq dd{margin:4px 0 0;color:var(--muted)}
.ad{min-height:90px;margin:16px 0}
article p{margin:0 0 14px}article ul,article ol{padding-left:22px}article li{margin:4px 0}
@media (max-width:600px){nav.menu a{margin-left:10px;font-size:13px}h1{font-size:22px}}
@media print{header.top,footer,.card.intro,.tools,.status,.ad,.drop,.grid,h1,p.lead{display:none!important}body{background:#fff}#viewer{max-height:none;overflow:visible;background:#fff}}