.postal-code-container {
    max-width: 1000px;
    margin: 0 auto;
}

.tool-section {
    background-color: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

.search-form {
    background-color: white;
    border-radius: 8px;
    padding: 1rem;
}

.result-container {
    background-color: white;
    border-radius: 8px;
    padding: 1rem;
}

.address-form {
    background-color: white;
    border-radius: 8px;
    padding: 1rem;
}

.validation-result {
    background-color: white;
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1rem;
}

.validation-result.valid {
    border-left: 4px solid #198754;
}

.validation-result.invalid {
    border-left: 4px solid #dc3545;
}

@media (max-width: 768px) {
    .tool-section {
        padding: 1rem;
    }
}