:root{color-scheme:dark;--paper:#101c18;--panel:#172820;--ink:#eff4f1;--muted:#b9c9c0;--accent:#a0e0bc;--line:#385145;font:18px/1.75 system-ui,-apple-system,"Noto Sans",sans-serif;background:var(--paper);color:var(--ink)}
*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-underline-offset:.2em}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid var(--accent);outline-offset:5px;border-radius:3px}p,li{overflow-wrap:anywhere}h1,h2,h3{line-height:1.25;text-wrap:balance}h1{font-size:clamp(2rem,5vw,3.1rem);letter-spacing:-.025em;margin:.5em 0 .75em;max-width:22ch}h2{font-size:1.5rem;margin-top:2em}h3{font-size:1.1rem;margin-top:1.6em}ul,ol{padding-left:1.4em}li+li{margin-top:.65em}strong{font-weight:650}.public-header,.public-footer{padding:24px max(24px,calc((100vw - 1000px)/2));background:var(--panel)}.public-header{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;border-bottom:1px solid var(--line)}.brand{font-size:1.4rem;font-weight:650;letter-spacing:-.02em;text-decoration:none;color:var(--ink)}.brand span{font-weight:400;margin-left:10px}.reader-link{display:inline-block;padding:10px 18px;border:1px solid var(--line);border-radius:12px;text-decoration:none;font-size:.9rem;font-weight:600;background:var(--panel)}.public-content{max-width:820px;margin:auto;padding:38px 24px 64px}.language-nav{font-size:.85rem;margin-bottom:42px}.eyebrow{letter-spacing:.12em;font-size:.7rem;color:var(--muted)}.lead{font-size:1.15rem;color:var(--ink)}.next-read{margin-top:3rem}.public-footer{border-top:1px solid var(--line);font-size:.85rem;color:var(--muted)}.public-footer nav{display:flex;gap:12px 24px;flex-wrap:wrap}.skip{position:absolute;left:16px;top:-100px;background:var(--paper);padding:10px;z-index:5}.skip:focus{top:10px}section{margin-top:2rem}code{font-size:.9em}img{max-width:100%;height:auto}
@media(prefers-color-scheme:light){:root{color-scheme:light;--paper:#f7faf8;--panel:#edf3ef;--ink:#14251b;--muted:#4b6254;--accent:#1b633c;--line:#a5b9ae}}
@media(max-width:420px){:root{font-size:16px}.public-header,.public-footer{padding:20px}.public-content{padding:28px 20px 48px}.language-nav{margin-bottom:32px}}
@media print{.public-header,.public-footer,.language-nav,.skip,.next-read{display:none}:root{background:white;color:black}.public-content{max-width:none;padding:0}a{color:inherit}}
/* Prepared CJK fonts also work without JavaScript or a device Chinese font. */
:root{font-family:system-ui,-apple-system,"Noto Sans TC","Noto Sans SC",sans-serif}:lang(zh-Hans){font-family:system-ui,"Noto Sans SC","Noto Sans TC",sans-serif}:lang(zh-Hant){font-family:system-ui,"Noto Sans TC","Noto Sans SC",sans-serif}