style.css

 @import url('https://fonts.googleapis.com/css2?family=Roboto+Mono&display=swap');
 html ,body{
     width: 100%;
     height: 100%;
 }
body{
  font-family: 'Roboto Mono', monospace;
  text-align: center;
  margin: 0;
  background-color: #cbcccc;
}
*{
    box-sizing: border-box;
}
h2{
    margin-top: -1rem;
    color:#0a0d26 ;
}
 h5{
    color: white;
   
}
p , a {
    color:#cfd2d3;
}
a{
     font-family: 'Roboto Mono', monospace;
     font-size: 1rem;
    text-decoration: none;
}
.container{
    padding: 5%;
    position: relative;
}
.cards-container{
    position: relative;
    margin-top: 3rem;
    width: 100%;
    height: 300px;
    display:flex;
    flex-direction: row;
    justify-content: space-evenly;
}

.card-container{
   background: rgb(32,38,97);
background: linear-gradient(39deg, rgba(32,38,97,1) 45%, rgba(11,13,33,1) 100%);
    border-radius: 1rem;
    box-shadow: 5px 5px 10px #6a77ed;
    border: 2px solid white;
    width: 20rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.card {
    position: relative;
    padding: 0 5%;
    max-width: 18rem;
    max-height: 10rem;
}
.card-container:hover{
    transform: scale(1.05);
    transition: .3s ease-in-out;
}
.card h5{
    font-size: 120%;
}
button {
    background: transparent;
    width: 100px;
    height: 50px;
    border: 2px solid white;
}
button:hover{
    outline: none;
  
  background-color: transparent;
  border-color: #6a77ed;
}
button:hover a {
    color: #6a77ed;
}
@media (max-width: 769px){
    .container{
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    h5{
         margin-top: -1rem;
    }
   .cards-container{
       margin-top: 0;
    display:flex;
    width: 70%;
    height: 700px;
    flex-direction: column;
    justify-content: center;
   }
   .card-container{
     margin: 2rem 0;
    border-radius: 1rem;
    border: 2px solid white;
    width: 100%;
    height: 50%;
    display: flex;
    flex-direction: column;
      justify-content: center;
}
.card {
    
    position: relative;
    padding: 0 5%;
    max-width: 95%;
    max-height: 18rem;
}
}
@media (max-width: 369px){
    .cards-container{
       margin-top: 0;
    display:flex;
    width: 90%;
    height: 800px;
    flex-direction: column;
    justify-content: center;
   }
}