.ssnvt-wrapper {
    max-width: 520px;
    margin: 30px auto;
    text-align: center;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

.ssnvt-input {
    width: 100%;
    padding: 16px;
    font-size: 16px;
    border-radius: 18px;
    border: 2px solid #ccc;
    outline: none;
    -webkit-text-size-adjust: 100%;
}

.ssnvt-input:focus {
    border-color: #6a5cff;
}

/* Prevent mobile zoom */
@media screen and (max-width: 768px) {
    .ssnvt-input {
        font-size: 16px;
    }
}

.ssnvt-btn {
    margin-top: 14px;
    padding: 14px 34px;
    border-radius: 30px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    background: linear-gradient(45deg, #ff0080, #7928ca, #2afadf);
    color: #fff;
}

.ssnvt-spinner {
    display: none;
    width: 40px;
    height: 40px;
    margin: 20px auto;
    border: 4px solid #ddd;
    border-top: 4px solid #7928ca;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.ssnvt-result {
    display: none;
    margin-top: 20px;
}

.ssnvt-card {
    padding: 20px;
    border-radius: 20px;
    font-weight: 600;
    color: #fff;
}

.ssnvt-card.valid {
    background: linear-gradient(135deg, #00c851, #007e33);
}

.ssnvt-card.invalid {
    background: linear-gradient(135deg, #ff4444, #cc0000);
}

@media screen and (max-width: 480px) {
    .ssnvt-card {
        font-size: 14px;
    }
}