:root{--font:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,'Helvetica Neue',Arial,'Noto Sans',sans-serif;--maxw:68ch}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);margin:0;line-height:1.5;color:#222;background:#fff}
header,main,footer{padding:1rem}
header{background:#f6f7f9;border-bottom:1px solid #e6e8eb}
h1,h2{line-height:1.2;margin:0 0 .6rem}
main{max-width:var(--maxw);margin:0 auto;padding-top:1.25rem}
p,li{font-size:1.025rem}
a{color:#1a73e8;text-decoration:none}
a:hover{text-decoration:underline}
ul{padding-left:1.2rem}
figure{margin:1rem 0}
img{max-width:100%;height:auto;border-radius:.5rem}
footer{border-top:1px solid #e6e8eb;color:#555;background:#fafbfc}
.skip{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip:focus{position:static;width:auto;height:auto;background:#ffd;padding:.25rem .5rem}
nav ul{display:flex;gap:1rem;list-style:none;margin:0;padding:0}
kbd{background:#eee;border:1px solid #ccc;border-bottom-color:#bbb;border-radius:3px;padding:.1rem .25rem;font-family:ui-monospace,Menlo,Consolas,monospace}
code{background:#f3f4f6;padding:.1rem .25rem;border-radius:.25rem}
small{color:#666}