* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #e6eefc, #f7fbff);
  display: grid;
  place-items: center;
}

.wrap {
  width: 100%;
  max-width: 420px;
  padding: 16px;
}

.card {
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 28px rgba(13, 71, 161, 0.12);
}

h1 {
  margin: 0 0 8px;
  font-size: 24px;
}

p {
  margin: 0 0 18px;
  color: #5d6d84;
}

form {
  display: grid;
  gap: 12px;
}

input {
  width: 100%;
  border: 1px solid #c6d4eb;
  border-radius: 10px;
  padding: 12px;
  font-size: 16px;
}

button {
  border: none;
  border-radius: 10px;
  padding: 12px;
  font-size: 16px;
  color: #fff;
  background: linear-gradient(140deg, #0d47a1, #1565c0);
}

#msg {
  margin-top: 12px;
  min-height: 22px;
  color: #c62828;
  font-size: 14px;
}