:root {
  color-scheme: light dark;
  --page: #f9f9f7;
  --panel: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --line: #c3c2b7;
  --accent: #2a78d6;
  --error: #b42323;
}
@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d;
    --panel: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --line: #383835;
    --accent: #5598e7;
    --error: #f08080;
  }
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: var(--page); color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; padding: 16px; }
.login { width: 100%; max-width: 22rem; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.brand { margin: 0; color: var(--ink-2); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; }
h1 { margin: 2px 0 20px; font-size: 1.4rem; font-weight: 600; }
form { display: grid; gap: 8px; }
label { color: var(--ink-2); font-size: 0.9rem; }
input, button { font: inherit; min-height: 40px; border-radius: 8px; }
input { width: 100%; padding: 6px 10px; border: 1px solid var(--line); background: var(--page); color: var(--ink); }
button { margin-top: 8px; border: 0; background: var(--accent); color: #fff; font-weight: 600; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.error { margin: 0; color: var(--error); font-size: 0.9rem; }