:root{--ink:#0b1220;--mute:#586273;--bg:#fbfcfe;--card:#fff;--accent:#0e6b4a;--line:#e6e8ef}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Inter,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:780px;margin:0 auto;padding:0 24px}
header{padding:28px 0;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}
.logo{font-weight:700;font-size:20px;letter-spacing:-.01em}
.logo span{color:var(--accent)}
nav a{margin-left:24px;color:var(--ink);font-size:14px}
article{padding:40px 0 24px}
article h1{font-size:34px;letter-spacing:-.02em;margin:0 0 6px}
article .meta{color:var(--mute);font-size:14px;margin-bottom:28px}
article h2{font-size:20px;margin:32px 0 8px;letter-spacing:-.01em}
article h3{font-size:16px;margin:20px 0 6px}
article p,article li{color:#1a2233}
article ul{padding-left:20px}
article a{word-break:break-word}
.callout{background:#f4f7fb;border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:18px 0;font-size:15px;color:#1a2233}
footer{padding:32px 0 56px;color:var(--mute);font-size:14px;border-top:1px solid var(--line);margin-top:32px}
footer a{color:var(--mute);margin-right:18px}
@media (max-width:520px){nav a{margin-left:14px;font-size:13px}article h1{font-size:28px}}