.aec-form {
    max-width: 700px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fff;
    border: 2px solid #58b754;
    border-radius: 12px;
    font-family: Arial, sans-serif;
}
.aec-form select, .aec-form input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #58b754;
    border-radius: 6px;
}
.aec-form button {
    background-color: #58b754;
    color: white;
    padding: 12px;
    width: 100%;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}
.aec-result {
    background-color: #c5f2b9;
    padding: 1rem;
    margin-top: 1rem;
    border-radius: 6px;
    font-weight: bold;
}
@media (min-width: 768px) {
    .aec-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
}