#sia-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999999;
    display: none;
}

.sia-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sia-box {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    max-width: 90%;
    animation: siaFadeIn 0.3s ease;
}

.sia-header h3 {
    margin: 0 0 15px 0;
    color: #333;
    font-size: 20px;
}

.sia-ad {
    width: 340px;
    height: 280px;
    margin: 0 auto 20px;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    overflow: hidden;
}

.sia-button {
    background: #ff5722;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

.sia-button:hover {
    background: #e64a19;
}

@keyframes siaFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive */
@media (max-width: 480px) {
    .sia-ad {
        width: 280px;
        height: 250px;
    }
    
    .sia-box {
        padding: 15px;
    }
}