*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body{
   background: url(https://64.media.tumblr.com/214581716cb4700891fee981197f0ff0/tumblr_ov3rmh2IuN1t1uzxmo1_400.gif);
   background-size: cover;
}

.main{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    align-content: center;
    text-align: center;
    padding: 50px;
}

.cards{
    display: grid;
    grid-template-columns: repeat(4, 200px); 
    gap: 15px;
    justify-content: center;
}

.card1,.card2,.card3,.card4,.card5,.card6,.card7, .card8{
   display: flex;
   justify-content: center;
   align-items: center;
   text-align: center;
   flex-direction: column;
   height: 50%;
   border: 3px solid black;
   margin: 5px;
}


h1{
    color: white;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-weight: bolder;
}

h2{
    color: white;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-weight: bolder; 
}

h3{
    color: white;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-weight: bolder;
}

h4{
    color: white;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-weight: bolder;
}

h5{
    color: white;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-weight: bolder;
}

img{
    height: 200px;
    width: 200px;
}

.card1,.card2,.card3,.card4,.card5,.card6,.card7,.card8{
    perspective: 1000px;
}

.card1, .card2, .card3, .card4, .card5, .card6, .card7, .card8 {
    transition: transform 0.6s;
    transform-style: preserve-3d;
    cursor: pointer;
}

.card1 img, .card2 img, .card3 img, .card4 img,
.card5 img, .card6 img, .card7 img, .card8 img {
    backface-visibility: hidden;
}

.card1 img, .card2 img, .card3 img, .card4 img,
.card5 img, .card6 img, .card7 img, .card8 img {
    display: none;
}

.card1, .card2, .card3, .card4,
.card5, .card6, .card7, .card8 {
    background-image: url(./verso\ de\ carta.png);
    background-size: cover;
    cursor: pointer;
}

img {
    display: none;
}

.card1,.card2,.card3,.card4,.card5,.card6,.card7,.card8{
    width: 200px;
    height: 200px;
    border-radius: 10px;
    transition: transform 0.2s;
}

.card1:hover, .card2:hover, .card3:hover, .card4:hover,
.card5:hover, .card6:hover, .card7:hover, .card8:hover{
    transform: scale(1.05);
}

button{
    width: 60px;
    height: 30px;
    border-radius: 5px;
    background-color:#8b890b;
    border: none;
    font-weight: bolder;
    margin: 3px;
}

button:hover{
    background-color: red;
    cursor: pointer;
    font-weight: bolder;
    font-style: italic;
}