:root {
  color-scheme: light dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  display: grid;
  min-height: 100vh;
  margin: 0;
  place-items: center;
  background: #f4f6fa;
  color: #172033;
}

main {
  box-sizing: border-box;
  width: min(100% - 32px, 440px);
  padding: 32px;
  border: 1px solid #dce2ec;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 16px 48px #17203312;
}

h1 { margin: 0 0 8px; font-size: 1.6rem; }
p { line-height: 1.5; color: #566176; }

#providers {
  display: grid;
  gap: 10px;
  margin: 24px 0;
}

button {
  width: 100%;
  min-height: 46px;
  padding: 10px 14px;
  border: 1px solid #c9d1df;
  border-radius: 9px;
  background: #fff;
  color: inherit;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:hover { background: #f0f4fa; }
button:disabled { cursor: wait; opacity: .65; }
#notice { min-height: 1.5em; color: #9a3412; }

#account {
  padding: 14px;
  border-radius: 9px;
  background: #f4f6fa;
  overflow-wrap: anywhere;
}

#account p { margin: 4px 0; }
a { color: #2457c5; }

@media (prefers-color-scheme: dark) {
  body { background: #111827; color: #e8edf6; }
  main { background: #1b2433; border-color: #344054; box-shadow: 0 16px 48px #0004; }
  p { color: #b2bdcf; }
  button { background: #222d3e; border-color: #43516a; }
  button:hover { background: #2d3a4f; }
  #account { background: #222d3e; }
  a { color: #9db9ff; }
}