html, body {
    margin: 0;
    height: 100%;
}
.text-center {
    text-align: center;
}

.text-white {
    color: white;
}

.text-gray {
    color: #f5f5f5;
}

.text-weight {
    font-weight: bold;
}

.border {
    width: 30vh;
    background-size: 100% 100%;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 10px;
}

.retcode {
    background: rgba(0, 0, 0, 0.075);
    border-radius: 5vw;
    width: 50vw;
    height: 13vh;
    padding: 10px 0px;
}
.footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    white-space: nowrap;
    line-height: 60px; /* Vertically center the text there */
}
.content {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.content div {
        width: 100%;
        text-align: center;
    }

.logo {
    width: 60px;
    height: 60px;
}

.name {
    font-size: 14px;
    color: #999;
}
.ercode {
    height: 13vh;
    width: 13vh;
    min-width: 23vh;
    min-height: 23vh;
    margin: 3vh;
}