:root {
  --bg: #071b33;
  --panel: #0f2d52;
  --line: #2d5f8f;
  --text: #d6e7ff;
  --muted: #94b6dd;
  --accent: #18d6ff;
  --accent2: #1ce2c7;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: "IBM Plex Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 10%, #11407a, var(--bg)) fixed;
}
.login-shell { width: min(460px, 92vw); }
.login-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  background: linear-gradient(180deg, #0c2646, #0a1f3b);
  box-shadow: inset 0 0 0 1px #52a8ff18, 0 12px 30px #00000055;
}
h1 { margin: 0 0 6px; font-size: 24px; }
.meta { margin: 0 0 14px; color: var(--muted); font-size: 13px; }
form { display: grid; gap: 10px; }
label { display: grid; gap: 5px; color: var(--muted); font-size: 12px; }
input {
  border: 1px solid #376390;
  border-radius: 8px;
  padding: 10px;
  color: var(--text);
  background: #102b4a;
}
button {
  margin-top: 6px;
  border: none;
  border-radius: 10px;
  padding: 10px 12px;
  color: #fff;
  cursor: pointer;
  background: linear-gradient(90deg,var(--accent),var(--accent2));
}
.status { min-height: 18px; margin: 10px 0 0; color: #ffb295; font-size: 12px; }

@media (max-width: 768px) {
  .login-shell {
    width: calc(100vw - 20px);
  }

  .login-card {
    padding: 16px 14px;
    border-radius: 12px;
  }

  h1 {
    font-size: 28px;
    line-height: 1.2;
  }

  .meta {
    font-size: 14px;
  }

  label {
    font-size: 13px;
  }

  input,
  button {
    min-height: 42px;
    font-size: 16px;
  }
}