* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f4f5f7;
  color: #172b4d;
  margin: 0;
  padding: 40px 16px;
}
main { max-width: 560px; margin: 0 auto; }
h1 { font-size: 26px; margin: 0 0 4px; }
.brand { font-size: 34px; font-weight: 800; letter-spacing: -0.5px; color: #0c66e4; }
h2 { font-size: 17px; margin: 0 0 6px; }
.sub { color: #5e6c84; margin: 0 0 24px; }
.card {
  background: #fff;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 2px rgba(9,30,66,.12);
}
.row { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.status { margin: 0; color: #5e6c84; }
.status.ok { color: #216e4e; }
.hint { margin: 6px 0 0; font-size: 13px; color: #8993a4; }
.btn {
  display: inline-block;
  background: #0c66e4;
  color: #fff;
  text-decoration: none;
  padding: 9px 16px;
  border-radius: 6px;
  border: none;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
}
.btn:disabled { background: #a5adba; cursor: not-allowed; }
.ghost {
  background: transparent;
  border: 1px solid #c1c7d0;
  color: #42526e;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}
.alert {
  background: #ffeceb;
  color: #ae2a19;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  text-transform: capitalize;
}
.alert.ok { background: #dcfff1; color: #216e4e; text-transform: none; }
footer { margin-top: 24px; font-size: 12px; color: #8993a4; text-align: center; }
code { background: #ebecf0; padding: 1px 5px; border-radius: 4px; }