* {
    box-sizing: border-box;
}

body {
    padding: .5rem;
    font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background-color: whitesmoke;
}

html {
    font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif;
}  
  
.header {
    background-image: linear-gradient(to right,rgb(153, 21, 204) , rgb(255, 165, 0));    
    color: #ffffff;
    padding: 8px;    
}

h1 {color: white; font-weight: 600; padding-right: 30px; text-shadow: 0 0 20px white;
    font-family: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 200%;
    font-weight: bold;
}

h4 {
  text-align: left;
}

.botonera_libro  {
    display: inline-block;
    justify-content: space-around;
    padding: 10px 0;    
  }
  .botonera_libro .btn {
    color: white;
    font-size: small;
    font-weight: 600;
    border: 2px orange solid;
    margin: 3px;
  }  

.button {
    background-color: #88dffc; 
   border: none;
   color: white;
   padding: 15px;
   text-align: center;
   text-decoration: none;
   display: inline-block;
   font-size: 16px;
   margin: 4px 2px;
   cursor: pointer;

      
}
 
.button1 {border-radius: 20px;}
 

h2 {
    color: darkblue;
}

h5, h3{
    color: darkblue;
}
p { 
    color: blueviolet;
    font-size: 130%;
}
h6 {
    color:black;
}

h3:hover {
    cursor: pointer;
    color:#ff0000;  
}

main {   
    float: left;
    width: 40%;
    padding: 0 30px;
    box-sizing: border-box;
}
aside {
    
    float: right;
    width: 60%;
    
    color: #fff;
    padding: 0 30px;
    box-sizing: border-box;
}

.car {
    border-radius: 10%;
    box-shadow: #7a00ff;
}
.car:hover {
    cursor: pointer;
    opacity: 50%;    
}

.cielo {
    box-shadow: 3px 5px;
}

.cielo:hover {
    transform: scale(1.1);    
    transition: transform .2s; 
}



.card {
    box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2);
    transition: 0.3s;
    border-radius: 5px; /* 5px rounded corners */
}

.glow-on-hover {
    width: 110px;
    height: 35px;
    border: none;
    outline: none;
    color: #fff;
    background: rgb(1, 181, 64);
    cursor: pointer;
    position: relative;
    z-index: 0;
    border-radius: 10px;
}

.glow-on-hover:before {
    content: '';
    background: linear-gradient(45deg, #ff0000, #ff7300, #fffb00, #48ff00, #00ffd5, #002bff, #7a00ff, #ff00c8, #ff0000);
    position: absolute;
    top: -2px;
    left:-2px;
    background-size: 400%;
    z-index: -1;
    filter: blur(5px);
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    animation: glowing 20s linear infinite;
    opacity: 0;
    transition: opacity .3s ease-in-out;
    border-radius: 10px;
}

.glow-on-hover:active {
    color: rgb(6, 168, 41)
}

.glow-on-hover:active:after {
    background: transparent;
}

.glow-on-hover:hover:before {
    opacity: 1;
}

.glow-on-hover:after {
    z-index: -1;
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgb(2, 181, 26);
    left: 0;
    top: 0;
    border-radius: 10px;
}

@keyframes glowing {
    0% { background-position: 0 0; }
    50% { background-position: 400% 0; }
    100% { background-position: 0 0; }
}

@media (max-width: 600px) {
    main, aside {
        width: 100%;
        float: none;      
    }
}

@media (max-width: 480px) {
    ul li{
        display:inside;
        align-content:space-between;
        margin-right: 80px;
        width:  50%;
        height: auto;
        float: none;
    }
    main .cielo {
        width: 250px;
        height: auto;
        margin: 10px 45px;       
    }
}

.cielo {
    width: 250px;
    height: auto;
}
@media (max-width: 480px) {
    ul li{
        width:  100%;
        height: auto;
    }
}