:root{--fg:#1d2433;--muted:#5b6475;--bg:#ffffff;--card:#f6f7fb;--line:#d9dde7;--accent:#2f6fde;--accent-fg:#ffffff}
@media (prefers-color-scheme:dark){:root{--fg:#e7eaf0;--muted:#a3abba;--bg:#14171d;--card:#1d2129;--line:#343a46;--accent:#6b9bff;--accent-fg:#0d1016}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
nav{border-bottom:1px solid var(--line);padding:.75rem 1rem}
nav p{max-width:46rem;margin:0 auto}
nav a{color:var(--fg);font-weight:600;text-decoration:none;margin:0 .4rem}
nav a:first-child{margin-left:0}
main,body>h1,body>p,body>pre,body>form,body>section,body>footer{max-width:46rem;margin-left:auto;margin-right:auto;padding-left:1rem;padding-right:1rem}
main{padding-top:1.5rem;padding-bottom:3rem}
h1{font-size:1.75rem;line-height:1.2}
a{color:var(--accent)}
label{display:block;font-weight:600;margin:.75rem 0 .25rem}
input[type=text],input[type=email],input[type=password],textarea,select{width:100%;padding:.55rem .65rem;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--fg);font:inherit}
textarea{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9rem;min-height:12rem}
button,.button{display:inline-block;margin-top:.75rem;padding:.55rem 1.1rem;border:0;border-radius:6px;background:var(--accent);color:var(--accent-fg);font:inherit;font-weight:600;cursor:pointer;text-decoration:none}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
section[id^="plan-"]{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem 1.25rem;margin:1rem 0}
pre{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:.75rem;white-space:pre;overflow-x:auto;scrollbar-color:var(--line) var(--card)}
table{border-collapse:collapse;width:100%}
th,td{border-bottom:1px solid var(--line);padding:.4rem .5rem;text-align:left}
footer{color:var(--muted);font-size:.9rem;padding-top:1rem;padding-bottom:2rem}