:root{
    font-size: 16px;
    /* --background-color: rgb(136, 238, 189); */
    --card-color: pink;
}

/* here start the grid template */

.grid-container{
    display: grid;
    /* grid-template-columns: repeat(6, 1fr); */
    grid-template-columns: 1fr 1fr;
    /* border: 2px solid gold; */
    grid-auto-rows: 200px;
    align-items: center;
    gap: 5px;
    margin-bottom: 6em;
}

.header {
    grid-column: 1 / 3;
    grid-row: 1 / 2;
    /* border: 2px solid rgb(0, 255, 204); */
    align-self: flex-start;
    text-align: center;
    font-size: 1.5rem;
}

.article-html-lessons {
    /* border: 2px solid gold; */
    grid-column: 1 / 2;
    grid-row: 2 / 3;
    text-align: center;
}

.article-html-exercises {
    /* border: 2px solid rgb(0, 255, 106); */
    grid-column: 2 /3;
    grid-row: 2 / 3;
    text-align: center;
} 

.article-css-lessons {
    /* border: 2px solid rgb(255, 0, 106); */
    grid-column: 1 / 2;
    grid-row: 3 / 4;
    text-align: center;
}


.article-css-exercises {
    /* border: 2px solid rgb(0, 47, 255); */
    grid-column: 2 / 3;
    grid-row: 3/ 4; 
    text-align: center;
} 

.footer {
    /* border: 2px solid rgb(210, 34, 241); */
    grid-column: 1 / 3;
    grid-row: 4/ 5;
    align-self: flex-end;
    text-align: center;
}

.footer {
    /* color: rgb(110, 18, 18); */
    font-size: 1.1rem;


}

/* button {
    background-color: var(--background-color);
    padding: 40px;
    /* width: 60%; */
    /* border-radius: 20px; */
    /* align-self: center; */
    /* box-shadow: 5px 5px rgb(146, 164, 146, 0.5); */
    /* box-shadow: rgba(0, 0, 0, 0.25) 0px 54px 55px, rgba(0, 0, 0, 0.12) 0px -12px 30px, rgba(0, 0, 0, 0.12) 0px 4px 6px, rgba(0, 0, 0, 0.17) 0px 12px 13px, rgba(0, 0, 0, 0.09) 0px -3px 5px; */
    /* box-shadow: rgba(255, 255, 255, 0.1) 0px 1px 1px 0px inset, rgba(50, 50, 93, 0.25) 0px 50px 100px -20px, rgba(0, 0, 0, 0.3) 0px 30px 60px -30px;
} */
 




/* styling the font and color, button*/

.html-exercises, 
.html-lessons, 
.css-exercises, 
.css-lessons {
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 1px;
    /* padding: 43px 60px 43px; */
    padding: 23px 40px 23px;
    outline: 0;
    border: 1px solid black;
    cursor: pointer;
    position: relative;
    background-color: rgba(0, 0, 0, 0);
    user-select: none;
    touch-action: manipulation;
}


/* bg color for the buttons */
.html-exercises::after{
  content: "";
  background-color: #5ce9b8;
  width: 100%;
  z-index: -1;
  position: absolute;
  height: 100%;
  top: 10px;
  left: 10px;
  transition: 0.2s ease-in;
}

.html-lessons::after {
    content: "";
  background-color: #5ce9b8;
  width: 100%;
  z-index: -1;
  position: absolute;
  height: 100%;
  top: 10px;
  left: 10px;
  transition: 0.2s ease-in;

}

.css-lessons::after {
    content: "";
  background-color: #5ce9b8;
  width: 100%;
  z-index: -1;
  position: absolute;
  height: 100%;
  top: 10px;
  left: 10px;
  transition: 0.2s ease-in;

}

.css-exercises::after {
    content: "";
  background-color: #5ce9b8;
  width: 100%;
  z-index: -1;
  position: absolute;
  height: 100%;
  top: 10px;
  left: 10px;
  transition: 0.2s ease-in;

}

button:hover::after{
    top: 0px;
    left: 0px;
}


/* @media screen and (min-width: 768px) {
    button {
        padding: 23px 60px 23px;
        color: blue;
    }

} */