:root{color-scheme:light dark;--bg:light-dark(#f4f5f7,#141518);--card:light-dark(#fff,#1d1f23);--ink:light-dark(#1d2129,#e8eaed);--muted:light-dark(#4e5969,#c3c8cf);--line:light-dark(#e5e6eb,#363a42);--accent:light-dark(#2563eb,#7aa2ff);--accent-ink:light-dark(#fff,#101621);--bad:light-dark(#b72e39,#ffa1a8)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font:15px/1.6 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
body{display:grid;place-items:center;min-height:100vh;padding:16px}
.box{width:min(360px,100%);background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px 24px;box-shadow:0 10px 30px -18px rgb(0 0 0/.25)}
h1{margin:0 0 18px;font-size:20px}
label{display:grid;gap:6px;margin-bottom:14px;color:var(--muted);font-size:13px}
input{font:inherit;color:var(--ink);background:transparent;border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:16px}
input:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
button{width:100%;font:inherit;font-weight:600;border:0;border-radius:8px;padding:11px;background:var(--accent);color:var(--accent-ink);cursor:pointer}
button:disabled{opacity:.6;cursor:wait}
#msg{color:var(--bad);margin:0 0 12px;font-size:13px}