style.css

*, ::before, ::after {
    box-sizing: border-box;
}
body {
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    background: rgb(207,207,207);
    font-family: 'Poppins',sans-serif;
}

.cartes {
    width: 300px;
    height: 530px;
    flex-shrink: 0;
    border-radius: 15px;
    background: #f1f1f1;
    display: flex;
    flex-direction: column;
    box-shadow: 0px 9px 9px rgba(0,0,0,0.5);
    margin: 60px 60px;
}

.deg {
    height: 50%;
    background:rgb(242,108,108,) ;
    background: linear-gradient(45deg,#fa3939, rgb(240,156,156));
    position: relative;
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
}
.cartes:nth-child(1) .deg img {
    width: 450px;
    position: absolute;
    top: -90px;
    left: -50px;
}
.cartes:nth-child(2) .deg img {
    width: 400px;
    position: absolute;
    top: -100px;
    left: -50px;
}
.cartes:nth-child(2) .deg {

    background: linear-gradient(45deg,#f09797, #fa3939);

}
.cartes:nth-child(3) .deg img {
    width: 350px;
    position: absolute;
    top: 0px;
    left: 0px;
}
.cartes:nth-child(3) .deg {

    background: linear-gradient(45deg,#f09797, #fa3920);

}
.titre {
    height: 5%;
    text-align: center;
    margin: 20px 0px 10px 0px;
}

.info {
    text-align: justify;
    height: 30%;
    padding: 10px 30px 0px 30px;
    line-height: 18px;
    font-size: 15px;
    margin: 0;
}

.btnBox {
    height: 15%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.btn {
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid #333;
    width: 120px;
    height: 30px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
}
.btn:hover {
    transition: all 0.2 ease;
    background: rgb(235, 237, 197);
    color: #f1f1f1;
}
a {
    text-decoration: none;
    color: #333;
}
a:link {
    color: #265301;
  }