.border-red{
    border: 1px solid red;
}
.border-green{
    border: 1px solid green;
}
.border-black{
    border: 1px solid black;
}
.border-yellow{
    border: 1px solid yellow;
}
.border-blue{
    border: 1px solid blue;
}

.f{
    display: flex;
}
.center{
    justify-content: center;
    align-items: center;
}
.column{
    flex-direction: column;
}
.row{
    flex-direction: row;
}

.h-100{
    height: 100%;
}
.w-60{
    width: 60%;
}
.ml-2{
    margin-left: 2rem;
}
.mt-0-5{
    margin-top: 0.5rem;
}
.mt-1{
    margin-top: 1rem;
}
.mb-1{
    margin-bottom: 1rem;
}