#drop-area {
    border: 2px dashed #ccc;
    padding: 20px;
    text-align: center;
    cursor: pointer;
}

#drop-area.highlight {
    border-color: #333;
}

#file-info {
    margin-top: 20px;
    display: none;
}

#file-info p {
    margin: 5px 0;
}

#optimized-result img {
    margin-top: 20px;
    max-width: 100%;
    height: auto;
}