body {
    background-color: #f4f4f4; /* Standard light grey background color */
}

.custom-card {
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: none;
}

.custom-card-header {
    background-color: #007bff; /* Standard Bootstrap primary color */
    color: white;
    padding: 15px;
    border-radius: 10px 10px 0 0;
}

.custom-card-body {
    padding: 30px;
    background-color: #ffffff;
}

.custom-label {
    font-weight: bold;
    font-size: 1rem;
    color: #333;
}

.custom-input {
    border-radius: 5px;
    border: 1px solid #ddd;
    padding: 10px;
    font-size: 1rem;
    background-color: #fff;
    transition: all 0.3s ease;
}

.custom-input:focus {
    border-color: #007bff;
    box-shadow: 0 0 8px rgba(0, 123, 255, 0.5);
}

.custom-btn {
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    border: none;
    transition: background-color 0.3s ease;
}

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

.card-header h4 {
    margin-bottom: 0;
    font-weight: 600;
    letter-spacing: 1px;
}