html, body {
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(circle at 20% 10%, #1a2233 0, #0f1623 60%) #0f1623;
  color: #e7ecf3;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  margin: 0;
}

.form-signin {
  width: 100%;
  max-width: 380px;
  padding: 28px 24px 24px;
  background: #1a2233;
  border: 1px solid #2a3550;
  border-radius: 14px;
  box-shadow: 0 1px 2px rgba(0,0,0,.4), 0 12px 32px rgba(0,0,0,.4);
}

.form-signin img { max-width: 220px; margin: 0 auto 16px; display: block; }

.form-signin h1 {
  font-size: 18px;
  font-weight: 600;
  color: #e7ecf3;
  margin-bottom: 16px;
  text-align: center;
}

.form-signin .form-control {
  background: #222c40;
  border: 1px solid #2a3550;
  color: #e7ecf3;
  padding: 10px 12px;
  font-size: 15px;
  border-radius: 8px;
  margin-bottom: 8px;
}

.form-signin .form-control:focus {
  border-color: #22c55e;
  box-shadow: 0 0 0 3px rgba(34,197,94,.18);
  background: #222c40;
  color: #e7ecf3;
}

.form-signin .form-control::placeholder { color: #6b7689; }

.btn-primary {
  background: #22c55e;
  border-color: #22c55e;
  color: #0f1623;
  font-weight: 600;
  border-radius: 8px;
  padding: 10px 14px;
}
.btn-primary:hover { background: #16a34a; border-color: #16a34a; color: #0f1623; }

.btn-link { color: #9aa6b8; }
.btn-link:hover { color: #e7ecf3; }

#err-msg {
  color: #ef4444;
  text-align: center;
  font-size: 14px;
  margin: 8px 0 12px;
}