#head ul li{
    display: inline;
    font-size: 30px;
    margin-right: 100px;
}
#head a{
    text-decoration: none;
}

#head ul{
    display: inline-block;
}

#head{
    display: inline;
    margin-left: 500px;
}

h1{
    text-align: center;
    margin-top: 100px;
    font-size: 50px;
    color: green;
    margin-bottom: 50px;
}

#padre .hijo{
    float: left;
    width: 20%;
    margin-right: 80px;
    border: 3px solid black;
    border-radius: 5px;
}

.hijo img {
    width: 100%;
}

#subtitulo{
    width: 75%;
    margin-bottom: 30px;
    margin-left: auto;
    margin-right: auto;
}

.hijo h2{
    color: red;
    text-align: center;
}

.hijo p{
    text-align: center;
}