body {
  background: #f4f7fb;
  font-family: "Segoe UI", Arial, sans-serif;
}

.navbar {
  background-color: #2c3e50 !important;
}

.navbar-brand, .nav-link {
  color: #ecf0f1 !important;
}

.card {
  margin-top: 50px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.btn-primary {
  background-color: #2980b9;
  border: none;
}

.btn-success {
  background-color: #27ae60;
  border: none;
}

h3 {
  margin-bottom: 20px;
}