style.css

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

.container {
    margin: 40px auto;
    width: max(50vw, 400px);
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

#file-upload {
    display: none;
}

.upload-icon {
    width: 30px;
}

#image-container {
    width: 100%;
    margin-top: 20px;
    position: relative;
}

#image-container>img {
    width: 100%;
}