How to add row with columns in website/theme

Hi,

I’m super new on this, but I’m trying to edit the theme of my store, I made an row with columns or element (responsive) that I would like to add to the website but I have no idea how to do it.
(the element created was following steps on the internet, I’m open to new proposals or suggestions)

https://puzzlebrands-com.myshopify.com/?_ab=0&_fd=0&_sc=1

* { box-sizing: border-box; text-align: center; font-family: Roboto; font-size: 12px; max-height: 65px; margin-top: 3px; }

/* Create four equal columns that floats next to each other */
.column {
float: left;
width: 25%;
padding-top: 10px;
padding-bottom: 10px;
}

/* Clear floats after the columns */
.row:after {
content: “”;
display: table;
clear: both;
}

/* Responsive layout - makes a two column-layout instead of four columns */
@media screen and (max-width: 900px) {
.column {
width: 50%;
}
}

/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
.column {
width: 100%;
}
}

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