:root{color-scheme:light dark;--bg:#fbf8f3;--fg:#1f1b16;--muted:#6b645b;--accent:#c4552d;--line:#e6dfd3}
@media (prefers-color-scheme:dark){:root{--bg:#171512;--fg:#f1ece4;--muted:#a79f93;--accent:#f08a5d;--line:#34302a}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:42rem;margin:0 auto;padding:1.5rem 1rem 4rem}
h1{font-size:1.9rem;line-height:1.2;margin:1.5rem 0 .25rem}
h2{font-size:1.2rem;margin:2rem 0 .5rem}
p,li{margin:.5rem 0}
ul{padding-left:1.25rem}
a{color:var(--accent)}
.meta,nav{color:var(--muted);font-size:.9rem}
nav{display:flex;justify-content:space-between;gap:1rem;border-bottom:1px solid var(--line);padding-bottom:.75rem}
details{border-bottom:1px solid var(--line);padding:.6rem 0}
summary{cursor:pointer;font-weight:600}
footer{margin-top:3rem;padding-top:1rem;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}

/* Primary button on the share-link pages (kept out of inline styles so the pages can run a strict CSP). */
.btn{display:inline-block;padding:14px 28px;border-radius:999px;background:#D4452F;color:#fff;font-weight:700;text-decoration:none}