body {
    background-color: #f8f9fa;
}

.card {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
    border: none;
    margin-bottom: 20px;
}

.card-header {
    background-color: #fff;
    border-bottom: 2px solid #f0f0f0;
    font-weight: 600;
}

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

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}