.neo-cf-smtp-form {
    max-width: 500px;
    margin: 20px auto;
    padding: 15px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.neo-cf-smtp-field {
    margin-bottom: 15px;
}

.neo-cf-smtp-field label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.neo-cf-smtp-field input,
.neo-cf-smtp-field textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

.neo-cf-smtp-submit {
    background-color: #0073aa;
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.neo-cf-smtp-submit:hover {
    background-color: #005c86;
}

.neo-cf-smtp-errors {
    max-width: 500px;
    margin: 0 auto 20px auto;
    padding: 10px 15px;
    border-left: 4px solid #dc3232;
    background-color: #fbeaea;
    color: #a00;
}

.neo-cf-smtp-popup {
    display: none;
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.neo-cf-smtp-popup--visible {
    display: block;
}

.neo-cf-smtp-popup-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.neo-cf-smtp-popup-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #ffffff;
    padding: 20px 25px;
    border-radius: 6px;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.25);
}

.neo-cf-smtp-popup-close {
    margin-top: 15px;
    padding: 8px 14px;
    border: none;
    background-color: #0073aa;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
}

.neo-cf-smtp-popup-close:hover {
    background-color: #005c86;
}