styles.css

body {
    padding: 10px;
}

h1 {
    margin-bottom: 25px;
    font-size: 2.2rem;
    display: inline-block;
}

.h1-wrapper {
    text-align: center;
}

hr {
    margin-top: 100px;
}

.transmitted-vec {
    display: none;
}

.readonly-transmitted-vec {
    overflow: hidden;
    white-space: nowrap;
}

.container-err-prob {
    margin: 20px auto 10px;
}

.vec-btn-group {
    text-align: center;
    padding-top: 30px;
}

.vec-btn-group > * {
    width: 80%;
}

.container-vec-code .form-check {
    margin-top: 10px;
}

.container-vec-code .row {
    margin-top: 20px;
}

#textInputArea {
    resize: vertical;
    max-height: 200px;
    min-height: 80px;
}

.container-text .row {
    margin-top: 20px;
}

.text-btn-group {
    text-align: center;
}

.text-btn-group > * {
    width: 70%;
}

#uploadedImg {
    margin-top: 20px;
}

.img-with-placeholder {
    margin: auto;
    width: auto;
    border: dotted gray 2px;
    height: 300px;
}

.img-cont {
    text-align: center;
}

.img-cont .custom-file {
    text-align: left;
}

.img-btn-group {
    text-align: center;
}

.img-btn-group > * {
    width: 70%;
}

.container-img .row {
    margin-top: 20px;
}

.red-color {
    color: #dc3545;
}