:root{--deep:#1f3d1c;--accent:#2f7d32;--paper:#f7f8f1;--ink:#1d2419;--muted:#5a6553;--line:#e1e6d8;--card:#fff}
@media (prefers-color-scheme:dark){:root{--accent:#7cc47f;--paper:#11160f;--ink:#e7ecdf;--muted:#9eab96;--line:#243021;--card:#182016}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans KR","Noto Sans JP","Helvetica Neue",Arial,sans-serif}
a{color:var(--accent)}img{max-width:100%;height:auto;display:block}
header{background:linear-gradient(135deg,#1f3d1c 0%,#2f6a2b 55%,#3b82c4 140%);color:#fff;padding:20px 16px 28px}
.wrap{max-width:820px;margin:0 auto}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:#fff;font-weight:700;font-size:18px}
.brand img{width:40px;height:40px;border-radius:10px}
header h1{margin:18px 0 6px;font-size:28px;line-height:1.25}
.meta{opacity:.85;font-size:14px;margin:0}
nav.lang{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px}
nav.lang a{font-size:13px;padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.14);color:#fff;text-decoration:none}
nav.lang a[aria-current=true]{background:#fff;color:var(--deep);font-weight:600}
main{padding:24px 16px 48px}
.callout{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:12px;padding:14px 16px;margin:0 0 24px}
h2{font-size:20px;margin:32px 0 10px;line-height:1.3}
p,li{margin:0 0 10px}ul{padding-left:20px}
.table-wrap{overflow-x:auto;margin:10px 0 16px}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:14px;background:var(--card)}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:rgba(47,125,50,.10)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px 12px 32px;margin:0 0 24px;font-size:14px;columns:2;column-gap:24px}
@media(max-width:520px){.toc{columns:1}}
.toc li{break-inside:avoid;margin:2px 0}.toc a{color:var(--ink);text-decoration:none}.toc a:hover{color:var(--accent)}
footer{border-top:1px solid var(--line);padding:24px 16px 40px;font-size:14px;color:var(--muted)}
footer .links{display:flex;flex-wrap:wrap;gap:6px 16px;margin-bottom:8px}
footer a{overflow-wrap:anywhere}
/* landing */
.hero{display:grid;grid-template-columns:1fr;gap:20px;align-items:center}
.hero .tagline{font-size:18px;opacity:.95;margin:0 0 18px}
.cta{display:inline-flex;align-items:center;gap:10px;background:#fff;color:var(--deep);font-weight:700;padding:12px 20px;border-radius:12px;text-decoration:none}
.cta small{font-weight:400;color:#5a6553}
.hero img.art{border-radius:20px;box-shadow:0 10px 30px rgba(0,0,0,.35);max-width:320px;width:100%}
@media(min-width:720px){.hero{grid-template-columns:1.2fr 1fr}.hero img.art{justify-self:end}}
.features{display:grid;grid-template-columns:1fr;gap:12px;margin:8px 0 8px}
@media(min-width:600px){.features{grid-template-columns:1fr 1fr}}
.feature{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.feature h3{margin:0 0 6px;font-size:16px;color:var(--accent)}
.feature p{margin:0;font-size:15px;color:var(--muted)}