body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: linear-gradient(135deg, #1a2454, #0b1020);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.container { width: 100%; max-width: 420px; padding: 16px; }
.panel {
  background: rgba(255,255,255,0.06);
  padding: 28px;
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}
h1 { text-align: center; margin-bottom: 20px; }
.form { display: grid; gap: 14px; }
input {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.1);
  color: #fff;
}
input::placeholder { color: #ccc; }
.btn {
  padding: 12px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(90deg, #5b9dff, #9c7bff);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}
.alert.error {
  background: rgba(255,92,92,0.25);
  padding: 10px;
  border-radius: 8px;
  margin-bottom: 14px;
}