/*Colores*/
:root {
    --adown: #3771d754;
    --rojo: #9c0312;
    --azul: #1d3968;
    --rdown: #c11627;
    --gris: #515151;
}

/*Reset*/
* {
    margin: 0;
    padding: 0;
    /*box-sizing: border-box;*/
    font-family: 'Times New Roman', Times, serif;
}

/* Main */
main {
    /*Tamaño de Altura*/
    height: auto;
    padding: 20px 10px;
    position: relative;
    min-width: 660px;
    display: block;
    align-items: center;
}

main .container {
    display: block;
    height: auto;
    width: 100%;
}

main .container img {
    height: 80vh;
    margin: 20px 0 15px;
    box-shadow: 10px 10px 20px 3px black;
    transition: 0.5s;
}

main .container img:hover {
    transform: scale(1.05);
}

main .opc {
    display: flex;
    justify-content: space-evenly;
    padding: 0;
    margin: 0;
}

main .back {
    width: 13%;
    margin: 20px 520px;
    font-size: 4vh;
    background-color: var(--rojo);
    border-radius: 10px;
    border: 2px solid black;
  }
  
  main .back a {
    color: white;
    text-align: center;
    text-decoration: none;
  }
  
  main .back :hover {
    color: black;
    background-color: white;
    box-shadow: 0 0 5px 5px black;
    border-radius: 10px;
  }

/*Responsive 'Main'{769px}*/
@media screen and (max-width: 1000px) {

    /*Main*/
    main {
        width: 83vh;
        padding: 20px 10px;
        background-color: white;
    }

    main .container {
        padding: 25px 0;
        margin: 0;
        justify-content: space-around;
    }

    main .container img {
        height: 35vh;
        margin: 5px 0 0;
    }

    main .container img:hover {
        transform: scale(1.04);
    }

    main .back {
        width: 28%;
        margin: 50px 280px 0;
        padding: 1vh;
    }
}

/*Responsive 'Header' {430px}*/
@media screen and (max-width: 550px) {

    /*Main*/
    main {
        width: 50vh;
        padding: 20px 15px;
        margin: 0;
        background-color: white;
    }

    main .container {
        height: auto;
        width: 100%;
    }

    main .container img {
        width: 40vh;
        height: 50vh;
    }

    main .container img:hover {
        transform: scale(1.03);
    }

    main .back {
        width: 25%;
        margin: 70px 250px 0;
        font-size: 3vh;
    }
}