* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  background: #f0f4ff;
  font-family: Arial, "Microsoft YaHei", sans-serif;
}


form {
  width: 100%;
  max-width: 360px;
  padding: 28px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

h1 {
  margin: 0 0 24px;
  text-align: center;
  font-size: 26px;
}

label {
  display: block;
  margin-bottom: 6px;
}

input {
  width: 100%;
  padding: 12px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 16px;
}

button {
  width: 100%;
  padding: 12px;
  background: #2563eb;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}