:root{color-scheme:dark;}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Noto Sans KR,Arial,sans-serif;background:#070b15;color:#e8ecf3}
.wrap{max-width:1100px;margin:0 auto;padding:18px 14px}
.card{border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.03);border-radius:16px;padding:14px}
h1{font-size:22px;margin:0 0 6px}
p{margin:0;color:#9aa3b2;line-height:1.6}
.row{display:grid;gap:14px;grid-template-columns:1.3fr .7fr;margin-top:14px}
@media(max-width:900px){.row{grid-template-columns:1fr}}
canvas{width:100%;height:auto;border-radius:16px;border:1px solid rgba(255,255,255,.08);background:linear-gradient(180deg,rgba(109,94,252,.08),rgba(0,0,0,.2))}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 12px;border-radius:14px;border:1px solid rgba(109,94,252,.55);background:rgba(109,94,252,.18);font-weight:900;cursor:pointer}
.btn:hover{background:rgba(109,94,252,.24)}
.kbd{font-family:ui-monospace,Menlo,Consolas,monospace;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);padding:2px 6px;border-radius:8px;font-size:12px}
.small{font-size:12px;color:#9aa3b2}