.doi-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

.doi-popup {
    background: #fff;
    padding: 30px 20px;
    max-width: 400px;
    width: 90%;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0,0,0,0.2);
    text-align: center;
}

.doi-title {
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 600;
}

.doi-input {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    text-align: center;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.doi-btn {
    background-color: #0073aa;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

.doi-btn:hover {
    background-color: #005f8d;
}

.doi-result {
    margin-top: 10px;
    font-size: 14px;
}

.elementor-form .elementor-message {
    display: none;
}