:root{color-scheme:light dark;--bg:#f7f9fb;--panel:#fff;--text:#17202a;--muted:#667085;--line:#d9e1e8;--accent:#1677c8;--danger:#b42318}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:var(--accent)}
.shell{width:min(100%,680px);margin:0 auto;padding:40px 18px 80px}
.brand{display:inline-flex;align-items:center;gap:9px;font-size:1rem;font-weight:700;color:var(--text);text-decoration:none}.brand img{width:34px;height:34px;display:block}.brand-only{width:44px;height:44px;display:grid;place-items:center}.brand-only img{width:36px;height:36px}
.panel{margin-top:24px;background:var(--panel);border:1px solid var(--line);padding:28px}
h1{margin:0 0 10px;font-size:1.65rem;line-height:1.3}
h2{font-size:1.12rem}
p{margin:8px 0;color:var(--muted)}
label{display:block;margin-top:16px;font-weight:650}
input,button{width:100%;min-height:46px;margin-top:7px;padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:var(--panel);color:var(--text);font:inherit}
button{margin-top:20px;border-color:var(--accent);background:var(--accent);color:#fff;font-weight:700;cursor:pointer}
button:disabled{opacity:.55;cursor:wait}
.secondary{background:transparent;color:var(--accent)}
.danger{width:auto;margin:0;border-color:var(--danger);background:transparent;color:var(--danger)}
.status{min-height:1.6em;margin-top:14px;color:var(--muted)}
.status.error{color:var(--danger)}
.nav{display:flex;gap:18px;align-items:center;justify-content:space-between}
.settings-links{display:flex;align-items:center;gap:15px}.settings-links a{min-height:40px;display:flex;align-items:center;color:var(--muted);font-size:13px;text-decoration:none}.settings-links a:hover,.settings-links a.active{color:var(--accent)}
.inline{display:inline}
.inline button{width:auto;margin:0;background:transparent;color:var(--accent)}
.credential{padding:16px 0;border-top:1px solid var(--line)}
.credential:first-of-type{border-top:0}
.credential-head{display:flex;align-items:start;justify-content:space-between;gap:16px}
.meta{font-size:.88rem;color:var(--muted)}
.notice{padding:12px;border:1px solid var(--line);background:var(--bg)}
.theme-choices{margin-top:14px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.theme-choice{width:auto;min-height:44px;margin:0;padding:8px;border-color:var(--line);background:var(--panel);color:var(--text);font-size:.88rem}.theme-choice.is-active{border-color:var(--accent);background:var(--accent);color:#fff}.theme-choice:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 35%,transparent);outline-offset:2px}
@media (prefers-color-scheme:dark){:root{--bg:#101418;--panel:#161c22;--text:#eef2f6;--muted:#a8b3bd;--line:#303a44;--accent:#5aa9e6;--danger:#ff8b82}}
:root[data-theme="light"]{color-scheme:light;--bg:#f7f9fb;--panel:#fff;--text:#17202a;--muted:#667085;--line:#d9e1e8;--accent:#1677c8;--danger:#b42318}
:root[data-theme="dark"]{color-scheme:dark;--bg:#101418;--panel:#161c22;--text:#eef2f6;--muted:#a8b3bd;--line:#303a44;--accent:#5aa9e6;--danger:#ff8b82}
@media(max-width:520px){.shell{padding-top:22px}.panel{padding:22px 18px}.credential-head{display:block}.danger{margin-top:12px}.theme-choices{grid-template-columns:1fr}.nav{align-items:flex-start}.settings-links{gap:9px;flex-wrap:wrap;justify-content:flex-end}.settings-links a{font-size:12px}}