:root{--bg:#f4f5f7;--card:#fff;--ink:#111827;--mut:#6b7280;--line:#e5e7eb;--brand:#c2410c;--brand-ink:#fff;
--head:#1f2937;--ok:#15803d;--okbg:#dcfce7;--grp:#fffbeb;--grpline:#fde68a;--link:#1d4ed8}
@media (prefers-color-scheme:dark){:root{--bg:#0f1115;--card:#181b22;--ink:#e5e7eb;--mut:#9ca3af;--line:#2a2f3a;--brand:#ea580c;
--head:#0b0d11;--ok:#4ade80;--okbg:#14301f;--grp:#2a2410;--grpline:#5b4a12;--link:#93c5fd}}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,'Apple SD Gothic Neo','Malgun Gothic','Noto Sans KR',sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}
a{color:var(--link)}
.in{max-width:760px;margin:0 auto;padding:0 16px}
header.site{background:var(--head);color:#fff}
header.site .in{display:flex;flex-wrap:wrap;gap:6px 18px;align-items:center;justify-content:space-between;padding-top:12px;padding-bottom:12px}
header.site a{color:#fff;text-decoration:none}
.brand{font-weight:800;font-size:17px}
header.site nav a{margin-left:14px;font-size:14px;opacity:.9}
header.site nav a:first-child{margin-left:0}
main{max-width:760px;margin:0 auto;padding:20px 16px 40px}
h1{font-size:24px;line-height:1.35;margin:.3em 0 .5em}
h2{font-size:19px;margin:1.8em 0 .5em}
p{margin:.6em 0}
.crumb{font-size:13px;color:var(--mut)}
.crumb a{color:var(--mut)}
.card{background:var(--card);border-radius:12px;padding:16px;box-shadow:0 1px 3px rgba(0,0,0,.08);margin:14px 0}
.hero{background:var(--card);border-radius:14px;padding:22px 18px;margin:6px 0 14px;box-shadow:0 1px 3px rgba(0,0,0,.08)}
.hero p{color:var(--mut)}
.btn{display:inline-block;background:var(--brand);color:var(--brand-ink);padding:12px 20px;border-radius:10px;font-weight:700;text-decoration:none;margin:6px 8px 6px 0}
.btn.alt{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.grid .card{margin:0}
.grid h3{margin:0 0 4px;font-size:16px}
.grid p{margin:0;font-size:14px;color:var(--mut)}
.qcard pre{white-space:pre-wrap;word-break:break-word;font-family:inherit;font-size:17px;margin:6px 0}
.qcard img{max-width:100%;height:auto;display:block;margin:12px auto;border:1px solid var(--line);border-radius:6px;background:#fff}
.qcard .grp{background:var(--grp);border:1px solid var(--grpline);border-radius:8px;padding:8px 10px;margin-bottom:10px;overflow-x:auto}
.qcard .grp pre{font-size:14px}
.qcard .no{color:var(--brand);font-weight:800}
details.ans{background:var(--card);border-radius:12px;padding:0;margin:14px 0;box-shadow:0 1px 3px rgba(0,0,0,.08)}
details.ans summary{cursor:pointer;padding:14px 16px;font-weight:700;list-style:none}
details.ans summary::-webkit-details-marker{display:none}
details.ans summary::before{content:"▸ ";color:var(--brand)}
details.ans[open] summary::before{content:"▾ "}
.ans-body{padding:0 16px 14px}
.ans-badge{display:inline-block;background:var(--okbg);color:var(--ok);font-weight:800;padding:6px 12px;border-radius:8px}
.ans-body pre{white-space:pre-wrap;font-family:inherit;background:var(--bg);padding:10px;border-radius:8px}
.pn{display:flex;gap:10px;margin:22px 0 8px}
.pn a{flex:1;text-align:center;padding:12px 6px;border-radius:10px;border:1.5px solid var(--line);text-decoration:none;color:var(--ink);background:var(--card);font-size:14px}
.pn a.off{visibility:hidden}
ol.ql,ul.ql{list-style:none;margin:0;padding:0}
.ql li{border-bottom:1px solid var(--line)}
.ql li:last-child{border-bottom:0}
.ql a{display:flex;gap:10px;padding:10px 4px;text-decoration:none;color:var(--ink)}
.ql .num{flex:none;min-width:3.4em;color:var(--brand);font-weight:700}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}
.chips a{padding:7px 12px;border:1.5px solid var(--line);border-radius:999px;text-decoration:none;color:var(--ink);background:var(--card);font-size:14px}
.ad{margin:34px 0;text-align:center;min-height:100px;position:relative}
.ad-label{display:block;font-size:11px;color:var(--mut);margin-bottom:4px}
.ad-demo div{border:2px dashed var(--mut);color:var(--mut);padding:34px 0;border-radius:8px}
footer.site{border-top:1px solid var(--line);margin-top:30px;padding:22px 0 40px;font-size:13px;color:var(--mut)}
footer.site nav a{margin-right:14px;color:var(--mut)}
footer.site .small{font-size:12px}
table{border-collapse:collapse;width:100%;font-size:14px}
td,th{border:1px solid var(--line);padding:8px;text-align:left;vertical-align:top}
.small{font-size:13px;color:var(--mut)}