body {
  background: #f4f4f4;
  font-family: Arial, sans-serif;
}

.box {
  width: 300px;
  padding: 20px;
  margin: 80px auto;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 0 10px #999;
  text-align: center;
}

input {
  width: 90%;
  padding: 10px;
  margin: 10px 0;
}

button {
  width: 95%;
  padding: 10px;
  background: #000;
  color: #fff;
  border: none;
}

.msg {
  color: red;
  font-size: 14px;
}