.flex{
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
}

.flex.va{
    flex-direction: column;
}

.flex item{
    padding-right: 4px;
}
.flex item input{

}
.center{

    display: flex;
    align-items: center;
    justify-content: center;
    height: calc(100vh - 160px);
}

.center > section {
    width: 320px;
}

input{
    padding: 10px;
    margin: 8px 0;
    width: 100%;
}
select{
    padding: 10px;
    margin: 8px 0;
}

button{
    padding: 10px;
    margin: 8px 0;
}
hr{
    border: none;
    border-bottom: solid 1px #b0b0b0;
    margin-top: 20px;
}


.error{
    font-size: 14px;
    color: #aa2222;
}
.error li{
    padding: 2px;
    margin-left: 16px;
}
.err{
    border-color: #ff1d1d;
    background-color: #fff6a7;
}