html, body {
    width: 100%;
    height: 100%;
    margin: 0;
}
body {
    font-family: Roboto, Arial, Helvetica, sans-serif;
    background: url('../src/background.jpg');
}
*{
    box-sizing: border-box;
}
.row {
    width: 100%;
    float: left;
}
.card {
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 1px 4px #0005;
    padding: 25px;
}
.txt-center {
    text-align: center;
}
.center {
    display: table;
    margin: auto;
}
.auto-w {
    width: 100%;
}
.top-spc {
    margin-top: 15px;
}
.top-spc-lg {
    margin-top: 45px;
}
.top-spc-xl {
    margin-top: 90px;
}
@media only screen and (min-width: 768px) {
    .auto-w {
        width: 30%;
    }
}
@media only screen and (max-width: 767px) {
    #logo {
        width: 80% !important;
    }
}