/* Base Styles */
body {
  font-family: Arial, sans-serif;
  background-color: #f8f9fa;
  color: #212529;
  font-size: 16px;
  line-height: 1.6;
}

/* Header */
header {
  background-color: #007bff;
}

/* Cards */
.card {
  border: none;
  border-radius: 8px;
}

.card-header {
  border-radius: 8px 8px 0 0 !important;
}

/* Forms */
form .form-control:focus {
  border-color: #007bff;
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* Buttons */
.btn-primary {
  background-color: #007bff;
  border-color: #007bff;
}

.btn-primary:hover {
  background-color: #0069d9;
  border-color: #0062cc;
}

.btn-secondary {
  background-color: #6c757d;
  border-color: #6c757d;
}

.btn-secondary:hover {
  background-color: #5a6268;
  border-color: #545b62;
}

.btn-danger {
  background-color: #dc3545;
  border-color: #dc3545;
}

.btn-danger:hover {
  background-color: #c82333;
  border-color: #bd2130;
}

/* Footer */
footer {
  background-color: #f8f9fa;
  border-top: 1px solid #dee2e6;
}

/* Responsive Design */
@media (max-width: 576px) {
  .container {
    padding: 0 15px;
  }
  
  .card-body {
    padding: 1rem;
  }
  
  .btn {
    margin-bottom: 5px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 1200px;
  }
}

/* Note List Items */
.list-group-item {
  border-radius: 8px;
  border: 1px solid #e9ecef;
}

.list-group-item:hover {
  background-color: #f8f9fa;
}

/* Utility Classes */
.shadow-sm {
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

.text-muted {
  color: #6c757d !important;
}

/* Animation */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}