* { box-sizing: border-box; }
body {
  min-height: 100vh;
  margin: 0;
  padding: 16px;
  display: grid;
  place-items: center;
  color: #172033;
  background: linear-gradient(145deg, #f6f4ff 0%, #eef4ff 52%, #f7f8fd 100%);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
}
.login-card {
  width: min(390px, 100%);
  padding: 38px;
  background: #fff;
  border: 1px solid #e9ebf1;
  border-radius: 20px;
  box-shadow: 0 22px 55px rgba(50, 66, 120, .13);
}
.login-logo {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(145deg, #6677e8, #9b73dc);
  border-radius: 14px;
  font-size: 22px;
}
h1 { margin: 20px 0 6px; font-size: 25px; }
p { margin: 0 0 24px; color: #858d9f; }
label { display: grid; gap: 7px; margin-top: 16px; font-size: 14px; font-weight: 650; }
input {
  height: 44px;
  padding: 0 13px;
  border: 1px solid #dfe3ec;
  border-radius: 10px;
  outline: none;
}
input:focus { border-color: #6677e8; box-shadow: 0 0 0 3px rgba(102, 119, 232, .12); }
button {
  width: 100%;
  height: 44px;
  margin-top: 24px;
  color: #fff;
  background: #5367d4;
  border: 0;
  border-radius: 10px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.login-message { margin-top: 14px; padding: 10px 12px; border-radius: 9px; font-size: 13px; }
.login-message.error { color: #b93636; background: #fff0f0; }
.login-message.success { color: #087b58; background: #eafaf4; }

@media (max-width: 480px) {
  .login-card { padding: 28px 22px; }
  h1 { font-size: 22px; }
}