.drop-zone {
    padding: 20px;
    width: 60%;
    min-height: 200px;
    border: 2px dashed #0087f7;
    border-radius: 8px;
}

    .drop-zone.hover {
        border-style: solid;
        border-width: 4px;
        border-color: #00C853;
    }

.error-message-container {
    color: red;
    text-align: center;
    font-weight: bold;
}