how to split a column values into separate columns?

I have a txt file details.txt like this

name class school

a 1 sec

b 2 pri

c 3 hrsec

I want the values separated by space as diffenent columns.
so column 1 should be
name

a

b

c

column 2 should be
class

1

2

3

By the end I want the file to be a .csv file.

I used

awk -F " " ‘OFS="\t" {print $1,$2,$3 > ("output.csv")}’ details.txt

When I open the output file in excel all the values are in the same column. Please help with this. I am new to this. Thanks.

>Solution :

Use , (for the CSV(

awk -vOFS=, '{print $1,$2,$3}' details.txt > output.csv

and Excel would take the columns