header {
    width: 100%;
    height: 500px;
    position: relative;
    background-image: url("images/apple-pie.jpg");
    background-size: cover;
    display: inline-block;
    margin-top: 10px;
    margin-left: 30px;
    margin-right: 30px;
   
}
body {
    font-family: sans-serif
}

h1 {color: rgb(255, 255, 255);
text-align: center;
line-height: 500px;
font-size: 50px;
;
}
.contenedor{
    margin-left: 30%;
    margin-right: 30%;
    margin-top: 30px;
}
img {
    
    position: relative;
    width: 45%;
    height: 45%;
    margin-top: 30px;
    margin-bottom: 30px;  
    margin-left: 30%; 
}
h2{
    font-size: 20px;
    margin-top: 30px;
    margin-bottom: 30px;
}
main, ul{
    font-size: 20px;
    color: grey;
}
footer {
    position: relative;
    width: 100%;
    height: 100px;
}
.linea {
    background-color: black;
    width: 100%;
    height: 3px
}
.ingr :before{
    content: "-"
}
.tiempo ol{
    counter-reset: df;
}
.tiempo>li{
    list-style-type: none;
    counter-increment: df;
}
.tiempo li::before{
    content:  counter(df) ")";
}