.tbg-member-registration {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

.tbg-member-registration h2 {
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

.tbg-member-registration h4 {
    color: #2980b9;
    margin-top: 20px;
    margin-bottom: 15px;
}

.form-check {
    margin-bottom: 10px;
}

.invalid-feedback {
    display: none;
    color: #e74c3c;
}

.is-invalid ~ .invalid-feedback {
    display: block;
}

.is-valid ~ .valid-feedback {
    display: block;
}

.card {
    margin-top: 30px;
    border: 1px solid #ddd;
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #ddd;
}

.btn-primary {
    background-color: #3498db;
    border-color: #3498db;
}

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}

.alert-info {
    background-color: #d1ecf1;
    border-color: #bee5eb;
    color: #0c5460;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: #ffeeba;
    color: #856404;
}