CSS Grid with Flexbox

/* ===================================== 
    Grid & Flexbox Layout
 ======================================== */
 .main-content {
   width: 95%;
   max-width: 1000px;
 display: grid;
   grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
   grid-gap: 20px;
 }
 .card {
   display: flex;
   flex-direction: column;
 }
 .btn {
   margin-top: auto;
 }