/* Minimal, readable placeholder styling */
:root{--max:980px;--fg:#111;--muted:#555;--bg:#fff;--line:#e8e8e8;}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--fg);background:var(--bg);line-height:1.55}
header{border-bottom:1px solid var(--line);background:#fafafa}
.wrap{max-width:var(--max);margin:0 auto;padding:18px}
nav a{margin-right:14px;color:var(--fg);text-decoration:none}
nav a:hover{text-decoration:underline}
h1{margin:0 0 10px;font-size:28px}
h2{margin:24px 0 10px;font-size:20px}
p{margin:10px 0;color:var(--fg)}
small,.muted{color:var(--muted)}
.card{border:1px solid var(--line);border-radius:12px;padding:16px;margin:14px 0;background:#fff}
footer{border-top:1px solid var(--line);background:#fafafa}
ul{padding-left:18px}
code{background:#f2f2f2;padding:2px 6px;border-radius:6px}