#form_container {
    padding: 15px 15px;
    margin-top: 15px;
    background: rgba(13, 21, 0, 0.6);
    color: #ffffff;
}

body {
    background-image: url("images/stduio-2035349_1280.jpg");
    background-size: cover;
    background-repeat: no-repeat;
}

.upload-btn-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.upload-btn-wrapper input[type=file] {
    font-size: 100px;
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
}