style.css

@import url('https://fonts.googleapis.com/css?family=Poppins&display=swap');

body {
    font-family: 'Poppins', sans-serif;
    font-size: 1.2rem;
    font-weight: 400;   
}

.container{
    margin-top: 5%;
    text-align: center;
}

.heading{
  font-size: 30px;
  font-weight: 200;  
    
}

.subheading{
    font-size: 30px;
    font-weight: 600;
}

.tagline{
    font-size: 14px;
    font-weight: 200;
}

/* cards */
.cards {
    display: flex;
    margin-left: 10%;
    margin-right: 10%;
}

.card-text {
    width: 75%;
    color: hsl(229, 6%, 66%);
}

.card1{
    flex-direction: column;
    justify-content: center;
}

.card-body1{
    border-top: 3px solid hsl(0, 78%, 62%);
    padding: 8%;
    border-radius: 2%;
    background-color: whitesmoke;
    margin-right: 10%;
}
.card-body2{
    border-top: 3px solid hsl(180,62%,55%);
    padding: 8%;
    border-radius: 2%;
    background-color: whitesmoke;
    margin-right: 10%;
}
.card-body3{
    border-top: 3px solid hsl(34, 97%, 64%);
    padding: 8%;
    border-radius: 2%;
    background-color: whitesmoke;
    margin-right: 10%;
}
.card-body4{
    border-top: 3px solid hsl(212, 86%, 64%);
    padding: 8%;
    border-radius: 2%;
    background-color: whitesmoke;
    margin-right: 10%;
}

@media (max-width: 375px) {

    body{
        padding: 5%;
    }
    .cards1{
        flex-direction: column;
    }

    .card-text{
        width: 100%;
    }
}