.flex-center{
    display: flex;
    align-items: center;
    justify-content: center;
}
.flex{
    display: flex;
}
.align-center{
    align-items: center;
}
.justify-center{
    justify-content: center;
}
.justify-end{
    justify-content: flex-end;
}
.red{
    border: 2px solid red;
}
.m-auto{
    margin: auto;
}
.lang-80{
    width: 80%;
}
.lang-90{
    width: 90%;
}
.lang-75{
    width: 75%;
}
.lang-85{
    width: 85%;
}