:root {
  color-scheme: light dark;
  font-family: system-ui, sans-serif;
  background: #f4f5f7;
  color: #20232b;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 24px; }
main { width: 100%; max-width: 360px; padding: 32px; border: 1px solid #dce0e6; border-radius: 16px; background: #fff; }
h1 { margin: 0 0 24px; font-size: 26px; }
form { display: grid; gap: 10px; }
label { font-size: 14px; }
input, button { width: 100%; min-height: 44px; border-radius: 8px; font: inherit; }
input { padding: 10px 12px; border: 1px solid #b4bbc7; background: #fff; color: inherit; margin-bottom: 8px; }
button { border: 0; background: #2458cb; color: #fff; cursor: pointer; }
button:disabled { opacity: .65; cursor: wait; }
:focus-visible { outline: 3px solid #698fe2; outline-offset: 3px; }
#login-status { min-height: 40px; margin: 4px 0 0; font-size: 14px; line-height: 1.5; }
@media (prefers-color-scheme: dark) {
  :root { background: #14161c; color: #edf0f5; }
  main { background: #1d2028; border-color: #3e4452; }
  input { background: #14161c; border-color: #697184; }
}