:root{--bg:#edf0f5;--surface:#fff;--line:#dde3ec;--ink:#16213a;--muted:#68748c;--accent:#2452d6;--accent-ink:#fff;--bad:#b3243a;--bad-soft:#fbe5e8;--ok:#17744a;--bar:#0e1c38;color-scheme:light}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0b1120;--surface:#131b2c;--line:#253049;--ink:#e6ebf5;--muted:#8d9ab3;--accent:#7d9bff;--accent-ink:#0b1120;--bad:#ff8090;--bad-soft:#3b1820;--ok:#5fd39a;--bar:#070d1a;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0b1120;--surface:#131b2c;--line:#253049;--ink:#e6ebf5;--muted:#8d9ab3;--accent:#7d9bff;--accent-ink:#0b1120;--bad:#ff8090;--bad-soft:#3b1820;--ok:#5fd39a;--bar:#070d1a;color-scheme:dark}
*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;display:flex;flex-direction:column}
header{background:var(--bar);color:#eef2fc;padding:14px 20px;font-weight:700;display:flex;gap:10px;align-items:center}header b{background:linear-gradient(135deg,#2452d6,#17a2b8);border-radius:6px;padding:2px 6px;font-size:13px}
main{flex:1;display:flex;align-items:center;justify-content:center;padding:24px 16px}
form{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:28px;width:100%;max-width:380px;display:flex;flex-direction:column;gap:14px;box-shadow:0 6px 20px rgba(16,28,56,.07)}
h1{font-size:20px;margin:0}p{margin:0;color:var(--muted);font-size:14px}label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600}
input{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--ink)}input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(36,82,214,.25)}
button{font:inherit;font-weight:600;padding:11px;border:0;border-radius:8px;background:var(--accent);color:var(--accent-ink);cursor:pointer}button:disabled{opacity:.6}
.err{background:var(--bad-soft);color:var(--bad);border-radius:8px;padding:9px 12px;font-size:14px}.err:empty{display:none}
a{color:var(--accent)}
header .sp{flex:1}header a{color:#cfd9f5;font-weight:500;font-size:14px}
main.stack{flex-direction:column;justify-content:flex-start;gap:16px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:28px;width:100%;max-width:380px;display:flex;flex-direction:column;gap:14px}
.panel form{padding:0;border:0;box-shadow:none;max-width:none}
.ok{background:#e3f4ea;color:var(--ok);border-radius:8px;padding:9px 12px;font-size:14px}.ok:empty{display:none}
.banner{background:#fff4d6;color:#6b4a00;border-radius:8px;padding:10px 14px;max-width:380px;width:100%;font-weight:600}
.qr{background:#fff;padding:8px;border-radius:8px;width:200px;align-self:center}.qr svg{display:block;width:100%;height:auto}
.mono,pre{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px}pre{background:var(--bg);padding:12px;border-radius:8px;margin:0;line-height:1.7}
button.quiet{background:transparent;color:var(--bad);border:1px solid var(--line)}
[hidden]{display:none!important}
.small{font-size:13px}