:root {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #24292f;
  background: #fff;
  color-scheme: light;
}
* { box-sizing: border-box; }
body { margin: 0; }
[hidden] { display: none !important; }
.login {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 28px;
  border: 1px solid #1f2328;
  border-radius: 6px;
  background: #1f2328;
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
}
.login-button:hover { background: #363b42; }
.login-button:focus-visible { outline: 3px solid #0969da; outline-offset: 4px; }
.login-message {
  max-width: 320px;
  margin: 16px 0 0;
  color: #b42318;
  font-size: 14px;
  line-height: 1.6;
  text-align: center;
}