:root{--fg:#14202b;--muted:#5a6b7a;--bg:#fbfcfd;--accent:#0f7b5f;--card:#fff;--line:#e3e8ee;--warn:#fff7e6}
*{box-sizing:border-box}body{margin:0;font:17px/1.65 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--fg);background:var(--bg)}
a{color:var(--accent)}header,footer{border-bottom:1px solid var(--line);background:#fff}footer{border-top:1px solid var(--line);border-bottom:0;margin-top:4rem;font-size:14px;color:var(--muted)}
.wrap{max-width:820px;margin:0 auto;padding:1rem 1.25rem}nav a{margin-right:1rem;text-decoration:none;font-weight:500}
.brand{font-weight:800;font-size:1.25rem;color:var(--fg);text-decoration:none;margin-right:1.5rem}.brand span{color:var(--accent)}
h1{font-size:2.1rem;line-height:1.2}h2{margin-top:2.2rem}code{background:#eef2f5;padding:.1em .35em;border-radius:4px;font-size:.92em}
pre{background:#14202b;color:#e8eef3;padding:1rem;border-radius:8px;overflow:auto}pre code{background:none;color:inherit}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem 1.25rem;margin:1rem 0}
.note{background:var(--warn);border:1px solid #f1d9a6;border-radius:8px;padding:.75rem 1rem;font-size:15px}
.cta{display:inline-block;background:var(--accent);color:#fff;padding:.6rem 1.1rem;border-radius:8px;text-decoration:none;font-weight:600}
input[type=email]{padding:.55rem;border:1px solid var(--line);border-radius:6px;width:min(320px,100%)}button{padding:.58rem 1rem;border:0;border-radius:6px;background:var(--accent);color:#fff;font-weight:600}
ul.check{list-style:none;padding-left:0}ul.check li{padding:.25rem 0 .25rem 1.8rem;position:relative}ul.check li:before{content:"☐";position:absolute;left:0}
.meta{color:var(--muted);font-size:14px}