*,
*::before,
*::after {
    box-sizing: border-box;
    font-family: Poppins, sans-serif;
    margin: 0;
    padding: 0;
}

:root {
    --Red: hsl(0, 78%, 62%);
    --cyan: hsl(180, 62%, 55%);
    --orange: hsl(34, 97%, 64%);
    --blue: hsl(212, 86%, 64%);
    --light-gray: hsl(0, 0%, 98%);
    --grayish-blue: hsl(229, 6%, 66%);
    --dark-blue: hsl(234, 12%, 34%);
}

body {
    min-height: 100vh;
    background-color: white;
    font-size: 15px;
    margin: 2rem 1.5rem;
}

img {
    max-width: 100%;
    display: block;
}

header p {
    opacity: .8;
    color: var(--grayish-blue);
    /* letter-spacing: -1px; */
    text-align: center;
}

h1 {
    text-align: center;
    margin-bottom: 10px;
    font-weight: lighter;
}

h1 span {
    color: var(--dark-blue);
    font-weight: 600;
}

.cards-holder {
    position: relative;
    margin-top: 70px;
    display: flex;
    justify-content: center;
    align-items: center;

}

.cards-holder .card {
    background-color: white;
    box-shadow: 0px 5px 15px var(--grayish-blue);
    padding: 30px;
    width: 350px;
    border-radius: 5px;
}
.cards-holder .card h2{
color: var(--dark-blue);
}
.cards-holder .card  p{
color: var(--grayish-blue);
margin-top: 10px;
}
.cards-holder .col .card img{
    margin:35px 0 0 auto;
}
.cards-holder .col:first-child .card{
    border-top: 5px solid var(--cyan);
    margin-right: 40px;
}
.cards-holder .col:nth-child(2) .card:nth-child(1){
    margin-bottom:30px;
    border-top: 5px solid var(--Red);
}
.cards-holder .col:nth-child(2) .card:nth-child(2) {
    border-top: 5px solid var(--orange);
}

.cards-holder .col:nth-child(3) .card {
    border-top: 5px solid var(--blue);
    margin-left: 40px;
}
@media (max-width:767px) {
    .cards-holder{
    flex-direction: column;
    }
    .cards-holder .col:first-child .card{
    margin-right: 0;
    }
    .cards-holder .col:nth-child(3) .card{
    margin-left: 0;
    }
    .cards-holder .col .card{
    margin-bottom: 20px;
    }
}