*,:before,:after{box-sizing:border-box}:root{--bg:#000;--fg:#fff;--fg-muted:#aaa}:root.light{--bg:#fff;--fg:#000;--fg-muted:#555}body{max-width:640px;color:var(--fg);background:var(--bg);margin:2rem auto;padding:0 1rem;font-family:monospace;font-size:1rem;line-height:1.6}nav{margin-bottom:2rem}a{color:var(--fg)}a:visited{color:var(--fg-muted)}h1,h2,h3{line-height:1.2}article{margin-top:1rem}small{color:var(--fg-muted)}button.theme-toggle{color:var(--fg);cursor:pointer;background:0 0;border:none;padding:0;font-family:monospace;font-size:1rem}