.captcha-box {
    width: 302px;
    border: 1px solid #dcdcdc;
    padding: 15px;
    font-family: Arial, sans-serif;
    font-size: 14px;
    color: #333;
    display: flex;
    align-items: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin: 50px auto;
    background-color: #f9f9f9;
    transition: background-color 0.3s, border-color 0.3s;
}

.checkbox {
    width: 25px;
    height: 25px;
    border: 2px solid #c1c1c1;
    margin-right: 10px;
    position: relative;
    cursor: pointer;
    transition: background-color 0.3s, border-color 0.3s;
}

.checkbox.checked {
    background-color: #4CAF50;
    border-color: #4CAF50;
}

.checkbox.checked::after {
    content: '✔';
    position: absolute;
    top: -2px;
    left: 3px;
    font-size: 18px;
    color: white;
}

.captcha-text {
    flex: 1;
    transition: color 0.3s;
}

.loading-spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid #ccc;
    border-top: 3px solid #4CAF50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.captcha-box.verified {
    background-color: #e6ffe6;
    border-color: #4CAF50;
}

.captcha-logo {
    width: 30px;
    height: auto;
    margin-left: 10px;
    opacity: 0.7;
}