body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: #f5f5f7;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
.card {
  background: #fff;
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  width: 320px;
  text-align: center;
}
h1, h2 { margin-top: 0; color: #1a1a1a; }
input {
  width: 90%;
  padding: 12px;
  margin: 8px 0;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 15px;
}
button {
  width: 96%;
  padding: 12px;
  background: #2563eb;
  color: white;
  border: none;
  border-radius: 6px;
  margin-top: 12px;
  font-weight: bold;
  font-size: 15px;
  cursor: pointer;
}
button:hover { background: #1d4ed8; }
.error { color: #dc2626; font-size: 14px; margin-top: 8px; }
.message { color: #16a34a; font-size: 14px; margin-top: 8px; }
a { color: #2563eb; text-decoration: none; font-size: 14px; }
.links { margin-top: 16px; display: flex; justify-content: space-between; }