:root{color-scheme:light dark;--bg:#fff;--fg:#1a1a1a;--muted:#666;--line:#d0d0d0;--accent:#0b5fff}
@media (prefers-color-scheme:dark){:root{--bg:#161616;--fg:#eee;--muted:#aaa;--line:#444;--accent:#6aa0ff}}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,sans-serif}
main{max-width:640px;margin:0 auto;padding:24px 16px}
h1{font-size:1.4rem}h2{font-size:1.1rem;margin-top:1.6rem}
.muted{color:var(--muted)}
label{display:block;margin:12px 0}
input{display:block;width:100%;box-sizing:border-box;padding:8px;margin-top:4px;font:inherit;color:inherit;background:transparent;border:1px solid var(--line);border-radius:6px}
button{font:inherit;padding:8px 14px;border-radius:6px;border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer}
button.link{background:transparent;color:var(--accent);border-color:var(--line);padding:4px 10px}
ul{padding:0;list-style:none}li{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}
#msg.err{color:#c0392b}#msg.ok{color:#1e8449}