:root{--bg:#fbfbfa;--fg:#1a1a1a;--muted:#5c5c5c;--line:#dedede;--error:#b42318;--item:8px;--block:16px;--section:32px;--gutter:20px;--frame:40rem}
@media(prefers-color-scheme:dark){:root{--bg:#141414;--fg:#ececec;--muted:#a6a6a6;--line:#333;--error:#ff8a80}}
*{box-sizing:border-box}html{color-scheme:light dark}
[hidden]{display:none!important}
body{margin:0;background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;font-size:16px;line-height:1.5;-webkit-text-size-adjust:100%}
a{color:inherit;text-underline-offset:3px}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--fg);outline-offset:4px}
h1,h2,p{margin:0}
h1{font-size:28px;letter-spacing:-.02em;font-weight:600;line-height:1.5;margin:var(--section) 0 var(--block)}
h2{font-size:20px;font-weight:600;margin:0 0 var(--item)}
header{border-bottom:1px solid var(--line)}
.header-inner,main,.footer-inner{max-width:var(--frame);margin-inline:auto;padding-inline:var(--gutter)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:56px}
.logo{display:inline-flex;align-items:center;gap:var(--item);min-height:44px;font-size:20px;font-weight:600;letter-spacing:-.02em;text-decoration:none}
.logo .mark{width:24px;height:24px;flex-shrink:0}
.language{font-size:13px;color:var(--muted)}
main{padding-bottom:var(--section)}
footer{border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.footer-inner{padding-block:var(--block) var(--section)}
footer nav{display:flex;gap:var(--block);margin-bottom:var(--item)}
footer nav a{display:inline-flex;align-items:center;min-height:32px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:8px 12px;border:1px solid var(--fg);border-radius:4px;background:var(--fg);color:var(--bg);font-size:13px;font-weight:600;white-space:nowrap;text-decoration:none}
.button.secondary{background:var(--bg);color:var(--fg)}