:root { --fg:#0b1220; --muted:#51607a; --accent:#2563eb; --bg:#ffffff; --line:#e5e7eb; }
*{box-sizing:border-box}
body{font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;color:var(--fg);background:var(--bg)}
.container{max-width:960px;margin:40px auto;padding:0 20px}
.hero{padding:16px 0;border-bottom:1px solid var(--line)}
h1{font-size:2.2rem;margin:8px 0}
h2{font-size:1.2rem;color:var(--muted);margin:0 0 10px}
.section{margin:28px 0}
.cta{display:inline-block;padding:12px 18px;background:var(--accent);color:#fff;text-decoration:none;border-radius:8px}
.grid{display:grid;grid-template-columns:1fr;gap:14px}
.card{border:1px solid var(--line);border-radius:10px;padding:16px}
.footer{margin:40px 0;color:var(--muted);font-size:.9rem}
kbd{background:#f3f4f6;border:1px solid #e5e7eb;border-bottom-width:2px;border-radius:4px;padding:2px 6px;font-family:ui-monospace,Menlo,Consolas,monospace}
.small{font-size:.9rem;color:var(--muted)}
.copy{margin-left:10px;padding:10px 12px;border:1px solid var(--line);background:#fff;border-radius:8px;cursor:pointer}
.notice{background:#f8fafc;border:1px dashed var(--line);padding:12px;border-radius:8px}
ul{margin:8px 0 0 18px}