body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.card {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.result-card {
    background-color: #e9ecef;
    border: none;
    margin-top: 20px;
}
.result-card p {
    margin-bottom: 10px;
}
.iban-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}
.iban-form {
    flex: 1;
    margin-left: 20px;
}
.iban-info {
    flex: 1;
    margin-right: 20px;
}
.card-header {
    background-color: #007bff;
    color: white;
}
.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}
.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}