:root {
  --bg: #0b1220;
  --card: #121a2a;
  --border: #243047;
  --text: #e8eef7;
  --muted: #94a3b8;
  --accent: #3b82f6;
}

* {
  box-sizing: border-box;
}

body.login-body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Segoe UI", "Noto Sans SC", system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 20% 0%, #1e3a5f, var(--bg));
  color: var(--text);
}

.login-card {
  width: min(400px, 92vw);
  padding: 28px 26px 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

.login-card h1 {
  margin: 0 0 10px;
  font-size: 22px;
}

.login-sub {
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.55;
}

.login-card .hint {
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.login-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--muted);
}

.login-form input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0f1624;
  color: var(--text);
  font-size: 15px;
}

.login-form .error {
  color: #fecaca;
  font-size: 13px;
  margin: 0 0 8px;
}

.btn-primary {
  width: 100%;
  margin-top: 6px;
  padding: 12px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
}

.btn-primary:hover {
  filter: brightness(1.05);
}