:root{--bg:#f3f4f6;--card:#fff;--ink:#12161c;--muted:#6b7380;--acc:#007f74;--soft:#d9f3f0;--line:#e1e4e9}
@media (prefers-color-scheme:dark){:root{--bg:#0e1116;--card:#171b22;--ink:#f1f3f5;--muted:#8a93a0;--acc:#5ee0d2;--soft:#11332f;--line:#262b34}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Apple SD Gothic Neo","Noto Sans KR","Noto Sans JP","Noto Sans SC","Noto Sans TC",sans-serif}
a{color:var(--acc)}main{max-width:900px;margin:auto;padding:22px 18px 64px}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;background:var(--card);color:var(--ink);padding:10px;z-index:5}
.top{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;letter-spacing:-.01em;text-decoration:none;font-size:1.15rem}.brand img{border-radius:9px;width:34px;height:34px}
.language{font:inherit;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:12px;padding:9px 30px 9px 11px}
nav{display:flex;gap:18px;flex-wrap:wrap;margin:22px 0}nav a{font-weight:700;text-decoration:none;color:var(--ink)}nav a[aria-current=page]{color:var(--acc);text-decoration:underline;text-underline-offset:6px}
article{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:clamp(22px,5vw,52px)}
h1{font-size:clamp(1.9rem,5vw,3rem);line-height:1.15;letter-spacing:-.03em;margin:.15em 0 .4em}h2{font-size:1.2rem;margin:1.9em 0 .3em}
.lead{font-size:1.1rem;max-width:42rem}.date,.muted{color:var(--muted)}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;padding:0;margin:30px 0;list-style:none}.features li{background:var(--soft);border-radius:16px;padding:18px;font-weight:600}
.cards{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}.cards a{display:inline-block;padding:12px 18px;background:var(--soft);border-radius:14px;font-weight:700;text-decoration:none;color:var(--ink)}
.contact{margin-top:36px;padding:18px 20px;background:var(--soft);border-radius:16px}.contact h2{margin:0 0 .3em}
footer{margin-top:28px;color:var(--muted);font-size:.92rem;text-align:center}
@media (max-width:640px){.features{grid-template-columns:1fr}}