#rightBox {
    position: fixed;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    width: 250px;
    padding: 15px;
    color: white;
    z-index: 1000;
}

#rightBox img {
    width: 100%;
    height: auto;
    display: block;
}

/* Close button */
.close-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 28px;
    height: 28px;
    background: white;
    color: #1976d2;
    border-radius: 50%;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    line-height: 28px;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.3);
    transition: all 0.2s ease;
}

.close-btn:hover {
    transform: scale(1.2);
    background: #f0f0f0;
}

/* 📱 Mobile */
@media (max-width: 768px) {
    #rightBox {
        width: 180px;
        right: 10px;
        top: 75%;
        bottom: 20px;
        transform: none;
    }
}

/* 📱 Very small devices */
@media (max-width: 480px) {
    #rightBox {
        width: 150px;
        right: 5px;
        bottom: 10px;
    }
}