.email-example {
    padding: 10px;
    border: 2px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
    width: 100%;
    max-width: 300px;
    transition: all 0.3s ease;
}

.email-example:valid {
    border-color: #28a745;
    background-color: #f8fff8;
    box-shadow: 0 0 5px rgba(40, 167, 69, 0.3);
}

.email-example:invalid {
    border-color: #dc3545;
    background-color: #fff8f8;
    box-shadow: 0 0 5px rgba(220, 53, 69, 0.3);
}

.email-example:focus {
    outline: none;
    box-shadow: 0 0 10px rgba(0, 123, 255, 0.3);
}