style.css

html,
body {
    font-family: Arial, Helvetica, sans-serif;
}

.container {
    margin: 40px auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.wrap {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
}

.left-column,
.right-column {
    flex: 1;
    padding: 10px;
    box-sizing: border-box;
    max-height: 500px;
}

@media (max-width: 508px) {

    .left-column,
    .right-column {
        flex: 100%;
    }
}

.custom-file-select {
    display: flex;
    align-items: center;
    cursor: pointer;
    gap: 10px;
    border: 2px solid black;
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 6px;
}

#file-select {
    display: none;
}

#out-container {
    width: 400px;
    height: 500px;
}

img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border: 1px dashed rgba(128, 128, 128, 0.5);
}

.bounding-box {
    position: absolute;
    box-sizing: border-box;
    border-width: 2px;
    border-style: solid;
}

.bounding-box-label {
    color: white;
    position: absolute;
    font-size: 12px;
    margin-top: -16px;
    margin-left: -2px;
    padding: 1px;
}