:root {
    --primary-color: #004a8d;
    --secondary-color: #b38e5d;
    --light-color: #f5f5f5;
}

body {
    background-color: var(--light-color);
}

.card {
    border: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.card-header {
    background: var(--primary-color);
    color: white;
    padding: 1.5rem;
    border-bottom: 3px solid var(--secondary-color);
}

.card-header h3 {
    margin-bottom: 0.5rem;
}

.card-body {
    padding: 2rem;
}

h4 {
    color: var(--primary-color);
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--secondary-color);
}

.form-label {
    font-weight: 500;
    color: #495057;
}

.form-control {
    border-radius: 4px;
    border: 1px solid #ced4da;
    padding: 0.75rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 74, 141, 0.25);
}

.btn-secondary {
    border: none;
    padding: 0.8rem 2rem;
    font-weight: 500;
}

.btn-primary {
    background-color: var(--primary-color);
    border: none;
    padding: 0.8rem 2rem;
    font-weight: 500;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
}

.text-muted {
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .card-body {
        padding: 1rem;
    }
    
    .row {
        margin-right: -0.5rem;
        margin-left: -0.5rem;
    }
    
    .col-md-6, .col-md-12 {
        padding-right: 0.5rem;
        padding-left: 0.5rem;
    }
}

.form-control.is-invalid {
    border-color: #dc3545;
}

.form-control.is-valid {
    border-color: #198754;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 74, 141, 0.25);
}

.invalid-feedback {
    display: none;
    color: #dc3545;
    font-size: 0.875em;
    margin-top: 0.25rem;
}