body {
    text-align: center;
    color: #333;
    font-family: tahoma, sans-serif;
    font-size: 18px;
    background: #fff;
    line-height: normal;
}

.btn {
    display: inline-block;
    width: 320px;
    margin: auto;
    text-decoration: none;
    background: #4ad576;
    padding: 10px 0;
    text-align: center;
    color: #fff;
    font-size: 20px;
    border-radius: 10px;
    border: 0;
}
.btn.open {
    background: #E91E63;
}
.btn.scan {
    background: #E91E63;
    margin-top: 10px;
}
a.btn.exit {
    position: absolute;
    left: 50%;
    margin-left: -160px;
    bottom: 10px;
    background: #1f9d47;
}
#reader {
    width: 100% !important;
}
input.text {
    display: inline-block;
    width: 320px;
    margin: auto;
    text-decoration: none;
    padding: 10px 0;
    text-align: center;
    font-size: 20px;
    border-radius: 10px;
    border: 0;
    background: #f4f4f4;
    margin-bottom: 10px;
}
td {
    border: 1px solid #cecece;
    padding: 10px;
    margin: 0;
}
table {
    max-width: 1200px;
    margin: auto;
    margin-top: 20px;
    width: 100%;
}
.mt-3 {
    margin-top: 90px;
}