button {
    transition: 
        all        1.2s 1.5s,
        border     0.5s 1.2s,
        box-shadow 0.3s;
    &:hover {
        transition: 
            all        1.2s,
            border     0.5s 1.2s,
            box-shadow 0.3s 1.5s;
    }
}