:root {
  color-scheme: light;
  --bg: #f6f5f2; --panel: #fcfcfb; --ink: #0b0b0b; --quiet: #52514e; --muted: #898781; --line: #e1e0d9;
  --accent: #2a78d6; --accent-tint: #e6effb; --wash: #f0efec; --good: #0ca30c; --good-text: #006300; --critical: #d03b3b; --warning: #fab219;
}
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --bg: #0d0d0d; --panel: #1a1a19; --ink: #fff; --quiet: #c3c2b7; --muted: #898781; --line: #2c2c2a; --accent: #3987e5; --accent-tint: #1b2a40; --wash: #24241f; --good-text: #0ca30c; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--ink); }
a { color: var(--accent); }
.shell { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
.brand { margin-bottom: 24px; font-size: 18px; display: flex; align-items: center; }
.brand .logo-img { height: 38px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 24px; margin-bottom: 16px; }
h1 { font-size: 22px; margin: 0 0 6px; }
h2 { font-size: 17px; margin: 0 0 6px; }
p { margin: 6px 0 12px; }
.meta { color: var(--quiet); font-size: 13px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--quiet); margin-bottom: 12px; }
input, select, textarea { font: inherit; padding: 9px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); width: 100%; }
button { font: inherit; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 9px 16px; border-radius: 8px; cursor: pointer; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button:disabled { opacity: .5; cursor: progress; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
@media (max-width: 560px) { .grid2 { grid-template-columns: 1fr; } }
.err { color: var(--critical); font-size: 14px; min-height: 1.2em; }
.ok { color: var(--good-text); font-size: 14px; }
.note { background: var(--wash); border-radius: 8px; padding: 10px 12px; font-size: 13px; color: var(--quiet); }
ol.how { padding-left: 20px; margin: 8px 0 14px; font-size: 14px; }
ol.how li { margin-bottom: 4px; }
code { background: var(--wash); padding: 1px 6px; border-radius: 4px; font-size: 13px; word-break: break-all; }
.logo-os { font-weight: 700; letter-spacing: .06em; font-size: .8em; color: var(--quiet); margin-left: 8px; }
.logo-img { display: block; height: 30px; width: auto; border-radius: 4px; }
.logo-link { display: flex; align-items: center; }
@media (prefers-color-scheme: dark) { .logo-img { box-shadow: 0 0 0 1px #3a3a37; } }