body {
    background-color: #f4f7f6;
    font-family: Arial, sans-serif;
}
.container {
    max-width: 1200px;
}
h2 {
    color: #333;
}
.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}
.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}
.alert {
    margin-bottom: 1rem;
}
.table {
    background-color: #fff;
    border-radius: 0.5rem;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
.modal-content {
    border-radius: 0.5rem;
}
.input-group {
    max-width: 400px;
}