body {
  background: linear-gradient(135deg, #0a3d62, #3c6382);
  font-family: "Segoe UI", Tahoma, sans-serif;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.card {
  border: none;
  border-radius: 20px;
  padding: 2rem;
  background: #fff;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

h4 {
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: #0a3d62;
}

label {
  font-weight: 500;
  color: #34495e;
}

.form-control {
  border-radius: 10px;
  padding: 0.75rem;
}

.btn-primary {
  background: #0a3d62;
  border: none;
  border-radius: 10px;
  padding: 0.75rem;
  font-weight: 600;
  transition: background 0.3s ease;
}

.btn-primary:hover {
  background: #3c6382;
}

.alert {
  border-radius: 10px;
}