:root{--bg:#faf7f1;--fg:#2b2620;--muted:#8a7f6e;--accent:#8a5d2b;--rule:#d8cfc0}
@media (prefers-color-scheme:dark){:root{--bg:#15171b;--fg:#e7e2d8;--muted:#9a917f;--accent:#d9b06a;--rule:#3a3f47}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:1.0625rem/1.75 Georgia,'Times New Roman',serif}
main{max-width:42rem;margin:0 auto;padding:0 1.15rem 4.5rem}
h1{font-size:1.85rem;line-height:1.25;margin:1.4rem 0 .3rem}
h2{font-size:1.3rem;margin:2.4rem 0 .8rem;line-height:1.35}
p{margin:0 0 1.05em}
em{font-style:italic}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
hr{border:0;border-top:1px solid var(--rule);margin:2.2rem auto;width:55%}
nav.story{display:flex;justify-content:space-between;align-items:center;gap:.8rem;
 font-family:system-ui,sans-serif;font-size:.88rem;padding:.7rem 0;border-bottom:1px solid var(--rule)}
nav.story.bottom{border-bottom:0;border-top:1px solid var(--rule);margin-top:3rem}
nav.story span{color:var(--muted)}
.lang{font-family:system-ui,sans-serif;font-size:.85rem;color:var(--muted);margin:.3rem 0 0}
header.hero{text-align:center;padding:2.5rem 0 1rem}
header.hero h1{font-size:2.1rem;margin:.2rem 0}
header.hero p{color:var(--muted)}
ol.toc{padding-left:1.6rem;margin:1rem 0 2.5rem}
ol.toc li{margin:.55rem 0}
.sub{display:block;color:var(--muted);font-size:.88em;font-style:italic;line-height:1.45}
footer{color:var(--muted);font-size:.85rem;font-family:system-ui,sans-serif;text-align:center;
 border-top:1px solid var(--rule);padding-top:1.4rem;margin-top:3.5rem;line-height:1.6}

.block{text-align:center;padding:2.4rem 0 1.2rem}
.block h1{font-size:2rem;margin:.2rem 0 .7rem}
.block p{margin:.3rem 0}
.muted{color:var(--muted)}
.btn{display:inline-block;font-family:system-ui,sans-serif;font-size:.95rem;
 padding:.55rem 1.05rem;border:1.5px solid var(--accent);border-radius:.55rem;margin:.5rem .25rem 0}
.btn:hover{text-decoration:none;background:var(--accent);color:var(--bg)}